77 results on '"meltblown"'
Search Results
2. Nanoval Technology—An Intermediate Process between Meltblown and Spunbond.
- Author
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Höhnemann, Tim, Schnebele, Johannes, Arne, Walter, and Windschiegl, Ingo
- Subjects
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METAL powders , *POLYPHENYLENE sulfide , *INJECTION molding of metals , *INJECTION molding , *AIR flow , *TURBULENT flow , *TURBULENCE - Abstract
The idea of "Nanoval technology" origins in the metal injection molding for gas atomization of metal powders and the knowledge of spunbond technologies for the creation of thermoplastic nonwovens using the benefits of both techniques. In this study, we evaluated processing limits experimentally for the spinning of different types of polypropylene, further standard polymers, and polyphenylene sulfide, marked by defect-free fiber creation. A numerical simulation study of the turbulent air flow as well as filament motion in the process visualized that the turnover from uniaxial flow (initial stretching caused by the high air velocity directed at the spinning die) to turbulent viscoelastic behavior occurs significantly earlier than in the melt-blown process. Modeling of the whole process showed that additional guide plates below the spinneret reduce the turbulent air flow significantly by regulating the inflow of secondary process air. The corresponding melt flow index of processible polymer grades varied between 35 g·10min−1 up to 1200 g·10min−1 and thus covering the range of extrusion-type, spunbond-type, yarn-type, and meltblown-type polymers. Hence, mean fiber diameters were adjustable for PP between 0.8 and 39.3 μm without changing components of the process setup. This implies that the Nanoval process enables the flexibility to produce fiber diameters in the typical range achievable by the standard meltblown process (~1–7 μm) as well as in the coarseness of spunbond nonwovens (15–30 μm) and, moreover, operates in the gap between them. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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3. 水驻极母粒对熔喷聚丙烯流变与结晶性能的影响.
- Author
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赵义侠, 钱子茂, 崔宪峰, 王素玉, 程可为, and 康卫民
- Abstract
Copyright of Journal of Tiangong University is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
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4. THE INFLUENCE OF CONSTRUCTION OF NON-WOVEN TEXTILES ON AIR PERMEABILITY FOR THEIR APPLICATION IN THE COMMUNITY FACE MASKS.
- Author
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ĽUDMILA, BALOGOVÁ and KAMILA, HULJAKOVÁ
- Subjects
NONWOVEN textiles ,MEDICAL masks ,PERMEABILITY ,SPUNBOND textiles ,SURFACE finishing ,HUMIDITY - Abstract
The article is aimed at evaluating the air permeability of various types of non-woven fabrics prepared by Spunbond, Spunbond-Meltblown-Spunbond technology and non-woven fabrics reinforced mechanically by needling and thermal calendering. These are commercially available non-woven fabrics with various mass per unit area and thickness made of 100 % polypropylene, without special surface finish. By combining individual types of non-woven fabrics, three-layer and four-layer textile materials were prepared, meeting the minimum requirement of technical standardization information TNI CWA 17553 for air permeability, intended for application in the community face masks. As part of the experimental works, the effect of increased humidity on the air permeability of three-layer non-woven fabrics was verified as well. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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5. 新型熔喷非织造材料研究进展.
- Author
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程可为, 刘 亚, 于 雯, and 赵义侠
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POLYPHENYLENE sulfide ,POLYURETHANES ,POLYPROPYLENE - Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
6. The Combination of Hydrogels with 3D Fibrous Scaffolds Based on Electrospinning and Meltblown Technology
- Author
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Jakub Erben, Radek Jirkovec, Tomas Kalous, Marketa Klicova, and Jiri Chvojka
- Subjects
electrospinning ,meltblown ,bioprinting ,scaffold ,hydrogels ,nanofibers ,Technology ,Biology (General) ,QH301-705.5 - Abstract
This study presents the advantages of combining three-dimensional biodegradable scaffolds with the injection bioprinting of hydrogels. This combination takes advantage of the synergic effect of the properties of the various components, namely the very favorable mechanical and structural properties of fiber scaffolds fabricated from polycaprolactone and the targeted injection of a hydrogel cell suspension with a high degree of hydrophilicity. These properties exert a very positive impact in terms of promoting inner cell proliferation and the ability to create compact tissue. The scaffolds were composed of a mixture of microfibers produced via meltblown technology that ensured both an optimal three-dimensional porous structure and sufficient mechanical properties, and electrospun nanofibers that allowed for good cell adhesion. The scaffolds were suitable for combination with injection bioprinting thanks to their mechanical properties, i.e., only one nanofibrous scaffold became deformed during the injection process. A computer numerical-control manipulator featuring a heated printhead that allowed for the exact dosing of the hydrogel cell suspension into the scaffolds was used for the injection bioprinting. The hyaluronan hydrogel created a favorable hydrophilic ambiance following the filling of the fiber structure. Preliminary in vitro testing proved the high potential of this combination with respect to the field of bone tissue engineering. The ideal structural and mechanical properties of the tested material allowed osteoblasts to proliferate into the inner structure of the sample. Further, the tests demonstrated the significant contribution of printed hydrogel-cell suspension to the cell proliferation rate. Thus, the study led to the identification of a suitable hydrogel for osteoblasts.
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- 2022
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7. Evaluation of polypropylene melt blown nonwoven as the interceptor for oil.
- Author
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Alassod, Abeer, Abedalwafa, Mohammed Awad, and Xu, Guangbiao
- Subjects
SOY oil ,POLYPROPYLENE ,EDIBLE fats & oils ,LUBRICATING oils ,SORBENTS - Abstract
The present study aims to evaluate PolyPropylene meltblown nonwoven sorbents as interceptor barrier for oils (motor oil – soybean oil). Experiments carried out in oil-water bath under both static and dynamic conditions. Among tested sorbents, sorbent P3 with porosity 85.93% show high sorption capacity. In which it achieves the highest absorption values 13.13 and 11.91 g/g for motor oil and soybean oil, respectively. Followed by sorbent P2 with porosity 88.30% and sorbent P1 with porosity 91.46%. Besides, results show that sorbent P1 registered the highest oil retention rate followed by sorbent P2 and sorbent P3, respectively. The SEM observation indicates that pore size and porosity play a significant role in deciding oil sorption and retention. At static condition, oil interception performance was evaluated. oil begins to break through the interceptor barrier in sorbent P3 at 29 min for motor oil with intercepting efficiency 98.00% and at 22 min for soybean oil with intercepting efficiency 96.57%. As the thickness of the interceptor barrier increases the time for initial leakage prolonged. After oil leakage, steady oil spillage took place. The typical oil leaking rate was divided into three phases in which oils leaks sharply increased rate, decrease rate and finally gently. Under dynamic conditions, quickly oil leakage happens compared to a static condition. With water flow rate 166 ml/s, the initial oil leakage for sorbent P3 shortens at 16 min for motor oil and 7 min for soybean oil, with Interception efficiencies at 93.42% and 90.00%, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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8. Respiratory mask using a combination of spunbond, meltblown, and activated carbon materials for reducing exposure to CO: an in vivo study.
- Author
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Khayan, Khayan, Anwar, Taufik, Wardoyo, Slamet, and Puspita, Widyana Lakshmi
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MATERIALS testing ,ENVIRONMENTAL management ,IN vivo studies ,CARBON monoxide ,AIR pollution - Abstract
Air pollution is a serious health problem in almost all developing and developed countries around the world. One component of air pollution dangerous for health is carbon monoxide (CO). The largest source of carbon monoxide is the burning of fossil fuels and peatland fires. The government continues to control pollution through both environmental management and summer pollution control. However, the resulting impact is less than optimal. We conducted a study to test the material used as an alternative respiratory protector in absorbing CO gas. The protective material comprised of a combination of spunbond, meltblown, and activated carbon materials. We carried the study out on a laboratory scale using experimental animals that were subjected to different stages of treatment. The results showed that respiratory protective masks with a combination of activated carbon and spunbond/meltblown materials were better able to inhibit CO exposure (p ≤ 0.001) than respiratory masks without activated carbon. The combination material is thus effective in absorbing CO; it can carry further research out on other harmful gases such as NO and NO
2 . [ABSTRACT FROM AUTHOR]- Published
- 2021
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9. Polipropilen esaslı meltblown nonwoven kumaşların üretim koşullarının değiştirilmesi ile bazı özelliklerinin incelenmesi.
- Author
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DÖNMEZ, Utkay, SEVİM, Murathan, NOZOĞLU, Hacer, NACAR, Cuma Yaşar, AKGÜL, Doğan, and ERSOY, Abdulkadir
- Subjects
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POLYMER melting , *WEIGHT (Physics) , *PERMEABILITY , *ATMOSPHERIC temperature , *FILTERS & filtration - Abstract
Polypropylene meltblown fabrics, thanks to their properties, their use in sorbent, filtration, hygiene and other sectors are increasing day by day. Thanks to the advantages of the process variety in meltblown production, different values can be obtained in physical properties such as weight, thickness, strength, air permeability and oil absorption. Meltblown fabrics of the same weight can be produced with different thickness or different strength values. This gives a great advantage to meltblown fabrics. In this study, it was observed how the physical properties of meltblown fabric produced at 29 m / min belt speed and 29 rpm pump speed change depending on meltblown production parameters such as blower hot air, beltmold distance, blower temperature, polymer melting temperature and belt air suction. Strength, air permeability, oil absorption and filtration efficiency tests were applied to the Meltblown fabrics and the results were analyzed. Changes in production parameters affected the performance of meltblown fabrics. Oil absorption value was determined between 1115-1451%, air permeability between 417-668 l / m2 / hr, and filtration efficiency value between 20.11% -30.63%. The production parameters of the best performing fabrics according to the test results are proposed as reference for their respective usage areas. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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10. 纺丝成网技术新进展及其在医用领域的应用.
- Author
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芦长椿
- Subjects
SARS-CoV-2 ,PERSONAL protective equipment ,CELLULOSE ,FILTERS & filtration ,TECHNOLOGY - Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
11. Estudio experimental de los campos de velocidades de dos diseños de boquillas de melt blown
- Author
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Ignacio Formoso, Alejandro Rivas, Gorka Sanchez, Juan Carlos Ramos, and Raúl Antón
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Meltblown ,textilno tejido ,anemometría de hilo caliente ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Se han realizado mediciones de los campos de velocidades del aire en dos diseños de boquillas de melt blown utilizando anemometría de hilo caliente, obteniéndose resultados para dos componentes de la velocidad. En este artículo se presentan y se comparan los principales resultados obtenidos para cada diseño de boquilla. También se analiza el efecto que producen los distintos parámetros geométricos de las boquillas en los campos de velocidades generados por las mismas. Las conclusiones emergentes de este trabajo ayudan a profundizar la comprensión acerca del funcionamiento de las boquillas de melt blown destinadas a aplicaciones de cola caliente.
- Published
- 2018
12. Influence of rheology and surface properties on morphology of nanofibers derived from islands-in-the-sea meltblown nonwovens.
- Author
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Soltani, Iman and Macosko, Christopher W.
- Subjects
- *
RHEOLOGY , *SURFACE properties , *NANOFIBERS , *MELTBLOWN textiles , *POLYMER blends , *POLYBUTYLENE terephthalate - Abstract
Melt blowing is the most common technique to directly produce nonwovens from polymeric resins without any demand for extra bonding steps. The relatively low diameter of meltblown fibers, 1–2 μm, makes them superior in separations performance to the competing melt processing technique, spun-bonding. To further decrease meltblown fiber diameter, the islands-in-the-sea approach was investigated in this study. Immiscible blends of a water-soluble polymer, sulfonated poly(ethylene terephthalate) (SP), and hydrophilic polybutylene terephthalate (PBT) and hydrophobic polyvinylidene fluoride (PVDF) were meltblown and the SP washed away to produce nanofibers of less than 200 nm diameter. Despite a significant increase in blend drop size upon increasing the minor phase fraction, ϕ , the nanofiber diameter increased only slightly. Thus, we conjecture that nanofiber diameter is mainly controlled by fiber pinch-off, induced by quick stretching during the melt blowing process, rather than being affected by initial drop size. At a high shear viscosity ratio, η minor /η matrix > 3, nanofibers showed a higher level of irregularities, particularly when the polymer flow rate decreased. At ϕ ≥ 0.2 fiber bundling was observed but with nanofibers from PVDF, due to its lower surface energy, compared with PBT, bundling decreased. Our work shows that using polymers with relatively low surface energy, and thus low tendency for coalescence, coupled with low viscosity can result in nonwoven mats of fibers with very low average diameter, low bundling, and an acceptable fiber regularity. With PVDF we achieved a record low average diameter of 36 nm. By using a water-soluble polymer matrix, such as sulfonated poly(ethylene terephthalate), concerns about cost and environmental problems related to chemical solvents are alleviated. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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13. ERİYİK ÜFLEME TEKNİĞİYLE ÜRETİLMİŞ, FARKLI TİPTE DİATOMİT İÇEREN POLİPROPİLEN DOKUSUZ YÜZEYLERİN YAĞ EMİCİLİK ÖZELLİKLERİNİN İNCELENMESİ
- Author
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ÖZEN, İlhan
- Abstract
Copyright of Journal of Textiles & Engineers / Tekstil ve Mühendis is the property of Union of Chambers of Turkish Engineers & Architects, Chamber of Textile Engineers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
14. 熔体纺丝成网非织造技术及装备的最新进展.
- Author
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徒元舜
- Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
15. Porosity and barrier properties of polyethylene meltblown nonwovens.
- Author
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Yesil, Yalcin and Bhat, Gajanan S.
- Subjects
POLYETHYLENE ,POROSITY ,MELTBLOWN textiles ,NONWOVEN textiles ,STRUCTURAL equation modeling - Abstract
There are several areas in which textiles have been highly desirable due to their specific and high performance for many industries and sectors including in civil engineering, automobile, medicine, filtration, and electronics. Polymer used has a significant effect on the properties of meltblown nonwovens. Polypropylene being the most commonly used polymer, very limited data have been reported on the polyethylene meltblown nonwovens which are desired due to their unique processing and performance advantages. In this study, we have investigated the effects of process variables, die temperature, air pressure, and die-to-collector distance on some characteristics of polyethylene meltblown nonwovens such as pore size, air permeability, hydrostatic head, and SEM analysis. It was observed that the variables have significant effects on the produced nonwovens, and many of the properties are comparable to those obtained with that of polypropylene meltblown webs. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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- View/download PDF
16. Annealing studies on a thermotropic liquid crystalline polyester meltblown fabric.
- Author
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Kocer, Hasan B., Cerkez, Idris, and Broughton, Royall M.
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MELTBLOWN textiles ,POLYESTERS ,LIQUID crystals ,TENSILE strength ,TEMPERATURE effect - Abstract
Meltblown fabrics composed of a thermotropic liquid crystalline polyester were subjected to heat conditioning at various temperatures. Physical effect of the treatment was investigated by tensile testing of the fabrics and the individual fibers. The fabrics exhibited increased tensile strength by more than 100% after the heat conditioning due to inter-fiber bonding in the fabric structure and morphological reorganization of the thermotropic polymer. The calorimetric behavior of the polymer was further investigated to obtain information about the internal structure. Structural change during the annealing was also visually observed under a polarized light microscope. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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17. Oil absorbency of diatomite-embedded polypropylene meltblown composite structures.
- Author
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Özen, İlhan, Okyay, Gamze, Şimşek, Süleyman, and Duran, Deniz
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MELTBLOWN textiles ,FATS & oils ,ABSORPTION ,POLYPROPYLENE ,DIATOMACEOUS earth ,COMPOSITE materials - Abstract
In this study, optimized conditions were established for diatomite grinding, which is a natural inorganic mineral with inherently high oil absorption capacity. Diatomite surface was modified with a fluorocarbon chemical and stearic acid via facile methods for enhancing compatibility between polypropylene and diatomite. Polypropylene/diatomite composites were generated in a twin screw extruder with/without using compatibilizer, and nonwoven structures were produced via meltblown technique. Pore size and void content analyses showed that addition of diatomite led to thicker fibers (1–17 µm (the neat polypropylene) vs. 1–32 µm (2 wt.% diatomite containing polypropylene)). Diatomite incorporation into polypropylene resulted in a rigid and brittle structure and a worsened oil absorption property (rust inhibitor oil absorption capacity: 1184% ± 105% (the neat polypropylene) vs. 718% ± 78% and 1089% ± 136% (2 wt.% diatomite containing polypropylene)). Increasing oil viscosity resulted in increased discrepancy among the oil absorption capacities of the neat polypropylene and diatomite containing polypropylene. Analysis of variance tests showed no changes or statistically insignificant differences in oil absorbency. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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18. СПАНБОНД И КОМПОЗИТНЫЕ НЕТКАНЫЕ МАТЕРИАЛЫ ТИПА СМС: ОСОБЕННОСТИ ПРОИЗВОДСТВА, ДИАГНОСТИЧЕСКИЕ ПРИЗНАКИ И ПРАКТИКА ИССЛЕДОВАНИЯ
- Subjects
optical microscopy ,сканирующая электронная микроскопия ,оптическая микроскопия ,meltblown ,структура ,СМС ,SMS ,spunbond ,нетканые материалы ,structure ,спанбонд ,мельтблаун ,scanning electron microscopy ,nonwovens - Abstract
В статье рассмотрен технологический процесс изготовления нетканых материалов, получаемых методом экструзии с последующим термоскреплением, таких как спанбонд и СМС. Подобные материалы широко применяются при производстве одноразовой медицинской одежды и белья, а также одноразовых средств индивидуальной защиты. Приведены отличительные особенности процессов изготовления данных полотен, описаны их возможные модификации, обусловленные различной конфигурацией производственных линий. С целью возможной дифференциации полотен, изготовленных по технологии спанбонд и СМС, при производстве экспертиз проведено исследование экспериментальных образцов комплексом инструментальных и химических методов. Установлено, что отличительной особенностью материалов типа СМС является наличие нескольких слоев, причем средний слой образован более тонкими волокнами, не превышающими 5 мкм в поперечнике. Кроме того, определено, что для всестороннего исследования термоскрепленных нетканых полотен необходимо дополнительно прибегать к использованию инструментальных методов, таких как инфракрасная спектроскопия с целью изучения молекулярного состава объекта, а также сканирующая электронная микроскопия для более углубленного изучения их структуры., The article discussed the technological process of manufacturing nonwovens obtained by extrusion with subsequent thermal bonding, such as spunbond and SMS. Similar materials are widely used in the production of disposable medical clothing and underwear, as well as disposable personal protective equipment. The distinctive characteristics of the manufacturing processes of these nonwovens are given, as well as possible modifications of nonwovens due to different configurations of production lines are described. Examinations of experimental samples by a complex of instrumental and chemical methods had carried out for possible differentiation of nonwovens made using the spunbond and SMS technology. It had established that a distinctive characteristic of SMS materials is the presence of several layers, while the middle layer had formed by thinner fibers that do not exceed 5 microns. Also had determined that for a high-quality and full-fledged study of such nonwovens, it is necessary to use instrumental methods such as infrared spectroscopy to study the molecular composition of the object, as well as the method of scanning electron microscopy for a more in-depth study of the structure., Судебная экспертиза, Выпуск 4 (72) 2022, Pages 102-117
- Published
- 2022
- Full Text
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19. Controlled Degradation of Commercial Resin for Meltblown Nonwoven Fabric Sheet Production
- Author
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Kentaro Taki, Kaho Osada, Yuya Sasai, and Yoshio Iizuka
- Subjects
Polypropylene ,high-shear rate ,Materials science ,Polymers and Plastics ,Nonwoven fabric ,Plastics extrusion ,Organic chemistry ,Rotational speed ,General Chemistry ,meltblown ,simulation ,Nusselt number ,Article ,Stress (mechanics) ,chemistry.chemical_compound ,Viscosity ,QD241-441 ,chemistry ,extruder ,Composite material ,controlled degradation ,thermal decomposition ,Melt flow index ,polypropylene - Abstract
Manufacturing meltblown nonwoven fabrics requires special grades of resin with very low viscosity, which are not dealt with so much on market and cost quite high compared to the standard grades. We propose a high-shear rate processing method that can quickly and easily produce such low-viscosity resin from the commercial one without using organic peroxides. In this method, we apply high-shear stress to molten resin by using a high-shear extruder, which is a single screw extruder with high screw rotation speed, and the resin is thermally decomposed of its shear-induced heat which is quickly generated. We found that polypropylene with a value of melt flow rate over a thousand, which was required for the meltblown process, was produced from the standard grade with the high-shear extruder at the screw rotation speed of 3600 min−1 and the barrel temperature over 300 ∘C. Using the degradated polypropylene, a meltblown nonwoven fabric sheet was successfully fabricated. We also developed a numerical simulator of the high-shear extruder which can handle a wide range of the screw rotation speed and barrel temperature by the Nusselt number modulated with the operational conditions. The experimental values of the zero-shear viscosity and temperature at the exit of the extruder agreed well with the simulation results. Our high-shear rate processing method will enable us to quickly and easily produce various meltblown nonwoven fabric sheets at low costs.
- Published
- 2021
20. Fabrication of micro-meltblown filtration media using parallel plate die design.
- Author
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Hassan, Mohammad Abouelreesh, Khan, Saad A., and Pourdeyhimi, Behnam
- Subjects
MELTBLOWN textiles ,NONWOVEN textiles ,MICROFABRICATION ,POLYMER melting ,MICROFIBERS - Abstract
ABSTRACT Meltblown fibers are typically produced using a die technology based on the slot concept, an extension of the sheet die technology with a series of holes substituting the center rectangular slot of the sheet die. While this prevalent technology has met with considerable success, an economical, facile design would be desirable. In this study a new parallel plate die concept to fabricate micro-meltblown fibers that offers simplicity, ease of use, and low cost was examined. The new die concept had parallel plates forming channels for polymer melt to flow through with a set of air holes surrounding them. This die design produced meltblown fibrous media with fibers in the range of 3-10 μm with pore size between 20 and 60 microns. The underlying mechanisms leading to such large fiber size formation and its implication in air filtration performance has been discussed. While conventional meltblown die generates fibers of smaller diameter and webs with higher filtration efficiency than the parallel plate geometry, design modifications could enhance the parallel plate meltblown die performance and make it a viable alternative. These die adaptations that include reducing air flow resistance, increasing the number of air nozzles around the polymer nozzles, recessing the polymer spinnerets above the die face, and having inclined air channels to increase the drag force on the fibers has been discussed. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42998. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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21. Polylactic acid face masks: Are these the sustainable solutions in times of COVID-19 pandemic?
- Author
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Zibiao Li, Chee Chuan Jayven Yeo, Xi Ping Ni, Kun Xue, Xian Jun Loh, Xunchang Fei, Jiuwei Li, Xiang Yun Debbie Soo, Qiang Zhu, Lu Jiang, and Suxi Wang
- Subjects
Environmental Engineering ,Materials science ,Hydrolytic degradation ,Polyesters ,Article ,law.invention ,chemistry.chemical_compound ,Polylactic acid ,law ,Ultimate tensile strength ,Non-woven ,Environmental Chemistry ,Humans ,Meltblown ,Waste Management and Disposal ,Pandemics ,Filtration ,chemistry.chemical_classification ,SARS-CoV-2 ,Masks ,COVID-19 ,Polymer ,Biodegradation ,Microplastic pollution ,Pollution ,Biodegradable polymer ,chemistry ,Chemical engineering ,Carbon dioxide ,Degradation (geology) ,PLA ,Plastics - Abstract
The global massive consumption of disposable face masks driven by the ongoing COVID-19 pandemic has emerged as a blooming disaster to both the land and marine environment that might last for generations. Growing public concerns have been raised over the management and control of this new form of plastic pollution, and one of the proposed sustainable solution is to use renewable and/or biodegradable resources to develop mask materials in order to minimize their environmental impacts. As a representative biodegradable polymer, polylactic acid (PLA) has been proposed as a promising candidate to produce non-woven face masks instead of those fossil-based polymers. To further explore the feasibility of this alternative mask material, the present work aims to study both the hydrolytic and bio-degradation behaviors of pure PLA-derived 3-ply disposable face masks at ambient temperature. Hydrolytic degradability was investigated at different pH conditions of 2, 7 and 13 with the whole piece of face mask soaked for regular timed intervals up to 8 weeks. Weight loss study showed neutral and acidic conditions had minimal effect on PLA masks, but rapid degradation occurred under basic conditions in the first week with a sharp 25% decrease in weight that slowly tapered off, coupled with solution pH dropping from 13 to 9.6. This trend was supported by mechanical property, bacterial filtration efficiency (BFE) and particulate filtration efficiency (PFE) studies. Masks soaked in basic conditions had their modulus and tensile strength dropped by more than 50% after 8 weeks where the middle layer reached 68% and 90% respectively just after 48 h, and BFE and PFE decreased by 14% and 43% respectively after 4 weeks, which was much more significant than those in neutral and acidic conditions. Base degradation was also supported by nuclear magnetic resonance (NMR) and fourier transform infrared (FTIR), which disclosed that only the middle layer undergo major degradation with random chain scission and cleavage of enol or enolate chain ends, while outer and inner layers were much less affected. Scanning electron microscopy (SEM) attributed this observation to thinner PLA fibers for the middle layer of 3–7 μm diameter, which on average is 3 times smaller. This degradation was further supported by gel permeation chromatography (GPC) which saw an increase in lower molecular weight fragment Mw ~ 800 Da with soaking duration. The biodegradation behavior was studied under OECD 301F specification in sewage sludge environment. Similarly, degradation to the middle meltblown layer was more extensive, where the average weight loss and carbon loss was 25.8% and 25.7% respectively, double that of outer/inner spunbond layer. The results showed that the face masks did not completely disintegrate after 8 weeks, but small solubilized fragments of PLA formed in the biodegradation process can be completely mineralized into carbon dioxide without generation of secondary microplastic pollution in the environment. PLA masks are therefore a slightly greener option to consider in times of a pandemic that the world was caught unprepared; however future research on masks could be geared towards a higher degradability material that fully breaks down into non-harmful components while maintaining durability, filtration and protection properties for users., Graphical abstract Unlabelled Image
- Published
- 2021
22. Erratum to: Chapters 2 and 9 of Polyolefin Compounds and Materials
- Author
-
Al-Ali AlMa’adeed, Mariam, Krupa, Igor, Kalia, Susheel, Series editor, Al-Ali AlMa'adeed, Mariam, editor, and Krupa, Igor, editor
- Published
- 2016
- Full Text
- View/download PDF
23. Mitigation of microfibers release from disposable masks – An analysis of structural properties.
- Author
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Rathinamoorthy, R. and Raja Balasaraswathi, S.
- Subjects
- *
MICROFIBERS , *POLYPROPYLENE fibers , *SPUNBOND textiles , *NONWOVEN textiles , *MEDICAL masks , *ABRASION resistance - Abstract
The use of disposable face masks increased rapidly among the general public to control the COVID-19 spread. Eventually, it increased the disposal of masks and their associated impacts on environmental pollution. Hence, this study aims to analyze the impact of nonwoven fabric structural parameters and weathering on the microfiber release characteristics. Spunbond polypropylene nonwoven with four different weights and meltblown nonwoven with two different weights were used in this study to analyze microfiber release at dry, and wet conditions to simulate improper disposal in the environment. Exposure to sunlight significantly increases the microfiber release from 35 to 50% for spunbond fabric and 56–89% for meltblown fabric. Weathering in sunlight structurally affected the tensile properties of the polypropylene fibers due to photodegradation. The study showed that each mask can produce 1.5 × 102 and 3.45 × 101 mg of microfiber/mask respectively in dry and wet states. In the case of structural parameters, a higher GSM (grams per square meter), abrasion resistance, bursting strength, and thickness showed a positive correlation with microfiber release in both fabrics. Significantly a higher microfiber release was reported with meltblown fabric than the spunbond for a given GSM. The presence of finer fibers and more fibers per unit area in meltblown fabric was noted as the main cause. Nonwoven fabric GSM and the number of fibers in a specific area showed a higher influence on microfiber release. Based on the mask consumption reported in the literature, India alone can produce around 4.27 × 102 tons of microfibers/week as an average of dry and wet conditions. The study suggests that the proper selection of physical parameters can significantly reduce the microfiber fiber release at all stages. [Display omitted] • Disposable masks can release microfibers upto 145.0 & 34.5 mg at dry & wet states. • Microfiber release can increase 2.9–4.9 times rafter natural weathering. • Manufacturing method, structural & physical properties affects microfiber release. • Melt-blown fabrics release more microfibers than spun-bonded fabrics. • India alone can release approximately 430 tons of microfibers from mask disposal. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
24. Determination of mineral content in polymelt nonwoven fabrics.
- Author
-
Yan, Yurong, Xu, Weihong, and Tsai, Peter P.
- Subjects
POLYPROPYLENE fibers ,NONWOVEN textiles ,MINERALS ,TEXTILE chemistry ,BUOYANCY - Abstract
Minerals have been widely added to polyolefins during film- or fiber-manufacturing process to improve the processibility as well as to enhance the product properties such as thermal conductivity, surface roughness, fabric filtration efficiency, and fabric capacity of oil absorbency. Titanium dioxide has been traditionally added in PET fibers as a delustrant to reduce their transparency for some applications, e.g. clothing materials. Calcium carbonate has recently been added in polymelt – spunbond and meltblown – fibers to increase the fiber processibility and to improve the fiber properties and hence to achieve their final performance. It is crucial that the adding quantity should be controlled so the fabric strength will not be adversely reduced. Calcium carbonate is frequently over-added in polymelt fibers to take the advantage in business trading by weight. A method is essential to determine the mineral content in the polymeric materials. While trying to use the volume of the fabrics displaced by liquid to determine the density of fibers fails, we successfully used buoyant force of the fabrics in a liquid to precisely determine the volume of the fibers and to use it to calculate the mineral content in spunmelt PP fabrics. A gadget was designed to incorporate with a balance to form a density balance for this research. It was observed that only a single layer but not multiple layers of fabric is a key point to accurately determine its buoyancy in the liquid. Multiple layers contributed to a relaxation of the bending forces at the folding lines of the fabric, which attributed to an error in measuring the buoyancy of the fabric. [ABSTRACT FROM PUBLISHER]
- Published
- 2015
- Full Text
- View/download PDF
25. Soil Degradation of Polylactic Acid/Polyhydroxyalkanoate-Based Nonwoven Mulches.
- Author
-
Dharmalingam, Sathiskumar, Hayes, Douglas, Wadsworth, Larry, Dunlap, Rachel, DeBruyn, Jennifer, Lee, Jaehoon, and Wszelaki, Annette
- Subjects
POLYLACTIC acid ,POLYHYDROXYALKANOATES ,SOIL degradation ,POLYMER blends ,MOLECULAR weights - Abstract
The soil degradation of fully biobased agricultural mulches prepared from polylactic acid (PLA) and blends of PLA and poly3-hydroxybutyrate-co-4-hydroxybutyrate (polyhydroxyalkanoate, or PHA) using nonwoven textile technology was compared to that of a commercial biodegradable mulch film, BioTelo (Dubois Agrinovation, Waterford, Canada). The addition of PHA to PLA to the feedstock blend produced nonwovens that possessed lower tensile strength and molecular weight and increased the average fiber diameter of mulches. A meltblown (MB) nonwoven mulch prepared from a PLA-PHA 72/28 w/w blend underwent the greatest degradation, achieving a 78 % loss of tensile strength and a 25.9 % decrease of weight-averaged molecular weight during 10 and 30 week of soil burial, respectively. The mass fraction of PHA decreased during soil burial, suggesting the preferential microbial assimilation of PHA over PLA. BioTelo underwent a 29 % loss of tensile strength but no appreciable change of molecular weight for its chloroform-soluble components. In contrast, spunbond (SB) PLA mulches did not undergo any appreciable degradation during the 30 week soil burial studies. The results suggest that the MB-PLA + PHA nonwoven may serve as a potentially valuable biodegradable agricultural mulch, and that SB-PLA may be useful as a compostable material for long-term agricultural applications, such as row covers and landscape fabrics. A soil degradation study of MB-PLA + PHA that directly compared untreated compost-enriched soil to sterilized soil-compost mixture demonstrated that the loss of tensile strength occurred only in the unsterilized soil, suggesting this event is directly associated with soil microorganisms. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
26. The combination of meltblown and electrospinning for bone tissue engineering.
- Author
-
Erben, Jakub, Pilarova, Katerina, Sanetrnik, Filip, Chvojka, Jiri, Jencova, Vera, Blazkova, Lenka, Havlicek, Jiri, Novak, Ondrej, Mikes, Petr, Prosecka, Eva, Lukas, David, and Kuzelova Kostakova, Eva
- Subjects
- *
ELECTROSPINNING , *TISSUE engineering , *BIOMATERIALS , *HYDROXYAPATITE in medicine , *PHARMACEUTICAL powders , *TISSUE scaffolds , *CELL proliferation - Abstract
Materials combining meltblown and electrospinning products with hydroxyapatite powder as potential scaffolds for bone tissue engineering are presented here. The combination of these technologies and parameters and final micro-nanofibrous products are introduced too. The in-vitro testing compared meltblown material, meltblown material with sputtered particles, meltblown material combined with electrospun fibers, meltblown material combined with electrospun fibers and sputtered particles. All the fibrous materials are produced from polycaprolactone. The first in-vitro tests showed the high potential of developed composite materials in bone tissue engineering. The structure of the tested materials allows osteoblasts to proliferate into the sample inner structure with the significant contribution of nanofiber content to cell proliferation. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
27. Spunbond and Meltblown Nonwoven Machinery in ITMA ASIA + CITME 2014.
- Subjects
SPUNBOND textiles ,MELTBLOWN textiles ,HIGH-speed machining ,ENERGY conservation ,TEXTILE industry - Abstract
Based on major spunbond and meltblown nonwoven technologies showed in ITMA ASIA+CITME 2014, the status-quo and developing trend of spunlaid nonwoven machinery worldwide are introduced in this article. Furthermore, the author points out that large-scale, high-quantity, high-speed and energy-saving are still the key words for this industry. [ABSTRACT FROM AUTHOR]
- Published
- 2014
28. Air-Filtering Masks for Respiratory Protection from PM2.5 and Pandemic Pathogens
- Author
-
Jinwei Xu, Xin Xiao, Wenbo Zhang, Rong Xu, Sang Cheol Kim, Yi Cui, Tyler T. Howard, and Esther Wu
- Subjects
Air filtration ,business.product_category ,Coronavirus disease 2019 (COVID-19) ,Fine particulate ,air pollution ,Review ,PM2.5 ,law.invention ,law ,Pandemic ,Earth and Planetary Sciences (miscellaneous) ,Respirator ,Process engineering ,electrospinning ,Filtration ,General Environmental Science ,business.industry ,pandemic ,respirator ,air filtration ,Research opportunities ,meltblown ,mask ,Key factors ,Environmental science ,business - Abstract
Air-filtering masks, also known as respirators, protect wearers from inhaling fine particulate matter (PM2.5) in polluted air, as well as airborne pathogens during a pandemic, such as the ongoing COVID-19 pandemic. Fibrous medium, used as the filtration layer, is the most essential component of an air-filtering mask. This article presents an overview of the development of fibrous media for air filtration. We first synthesize the literature on several key factors that affect the filtration performance of fibrous media. We then concentrate on two major techniques for fabricating fibrous media, namely, meltblown and electrospinning. In addition, we underscore the importance of electret filters by reviewing various methods for imparting electrostatic charge on fibrous media. Finally, this article concludes with a perspective on the emerging research opportunities amid the COVID-19 crisis., Considering that air pollution will continue to be a major health concern in newly industrialized countries and the ongoing COVID-19 pandemic may create lasting cultural shifts around the world to increase mask usages, the pursuit of more efficient and cost-effective masks will be a cornerstone to maintaining public health. This review provides a comprehensive picture of the historic development of air-filtering masks, identifies remaining knowledge gaps, and envisions emerging research opportunities amid the pressing challenges of air pollution and COVID-19.
- Published
- 2020
- Full Text
- View/download PDF
29. Modeling and experimental study of pore structure in melt-blown fiber assembly.
- Author
-
Sun, Guangwu, Chen, Yu, Ruan, Yanwen, Li, Guanzhi, Hu, Wenfeng, and Xin, Sanfa
- Subjects
POROSITY ,AIR jets ,AIR pressure - Abstract
It is widely known that the pore size of a meltblown fiber assembly extensively affects the final applications of its products. We have developed a model for simulating melt-blowing production to investigate the formation mechanism of a fiber assembly. In this study, we calculated the pore size under different production conditions using the model. The predicted results reveal the relationship between the pore size and the production conditions, namely, the air jet pressure, suction pressure, die temperature, polymer flow rate, die to collector distance, and collector speed. The predicted results also verified the experimental trends reported in previous studies. High air jet pressure and die temperature tend to generate smaller pores, while a large polymer flow rate, die to collector distance, and collector movement speed contribute to the production of larger pores in the fiber assembly. In addition, the circularity was predicted in this study to describe the pore shape. The numerical investigation of virtual production is a novel method in which the expected pore size and corresponding production conditions can be easily obtained using a computer with a few keystrokes and mouse clicks. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
30. Investigation of sound transmission loss of natural fiber/rubber crumbs composite panels.
- Author
-
El Messiry, Magdi and Ayman, Yasmin
- Subjects
CRUMB rubber ,TRANSMISSION of sound ,NATURAL fibers ,WASTE tires ,TEXTILE fibers ,POLYLACTIC acid ,WOOL - Abstract
Natural fibers and their waste are widely used all over the world, and their production has been increasing continuously. But, the rubber crumbs from used tire disposal are nonbiodegradable and present significant problems about their end-of-life given a critical environmental impact. These problems require recycling policies to provide the collection and recycling of used clothing, textile wastes, and rubber crumbs. In this work, the acoustic properties of insulator panels from the combination of textile fibers and rubber crumbs material were analyzed. Insulator panels demonstrated a good sound transmission loss (STL) characteristic, especially at high frequencies. The STL of the manufactured panels from a combination of fiber (cotton, wool, and Kapok) and rubber crumbs was investigated at the different sound frequencies. Results indicated that the fiber/rubber crumbs panel had a significant STL profile of 47 dB, 40 dB, and 35 dB, for Kapok, wool, and cotton, respectively. The addition of polylactic acid meltblown nonwoven fabric on the surface of the rubber crumbs side considerably increases the STL by 20%. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
31. INVESTIGATION OF THE PHYSICAL PROPERTIES OF MELTBLOWN NONWOVENS FOR AIR FILTRATION.
- Author
-
DURAN, Kerim, DURAN, Deniz, OYMAK, Gülşah, KILIÇ, Kevser, ÖNCÜ, Ezgi, and KARA, Mehmet
- Abstract
Copyright of Journal of Textile & Apparel / Tekstil ve Konfeksiyon is the property of Tekstil ve Konfeksiyon and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
32. Liquid sorption behaviour of nonwovens.
- Author
-
Rengasamy, Raju Seenivasan, Kothari, Vijay Kumar, Bele, VijayS., and Khanna, Rajesh
- Subjects
NONWOVEN textiles ,SPUNBOND textiles ,POLYPROPYLENE ,THERMOPLASTICS ,EXPERIMENTS ,POROSITY - Abstract
In this paper, spunbond, meltblown and spunbond–meltblown–spunbond (SMS) nonwovens made from polypropylene are analysed for liquid transport behaviour. The thickness, grams per square metre (GSM), porosity, fibre diameter, fibre orientation distribution and water contact angles of these nonwovens are measured. Vertical wicking with decane using tensiometry and water absorbency and spreading using gravimetric absorbency tester are reported. The equivalent pore radii of the nonwovens are deduced from the vertical sorption experiments using tensiometry. The sorption rate under vertical wicking and water spreading rates are faster along machine direction compared with that in cross‐direction due to preferential fibre orientation. The thickness of the nonwoven, fibre diameter and porosity play a vital role in transporting liquid. Thin nonwovens have poor vertical wicking and spreading rate. SMS web has poor absorbency behaviour mainly due to the inability of its top S‐layer to pull the liquid from the middle M‐layer. The measured water spreading lengths with respect to time are compared to the theoretical ones using a model developed by earlier researchers. This model reasonably predicts the spreading behaviour of nonwovens. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
- Full Text
- View/download PDF
33. Polylactic acid face masks: Are these the sustainable solutions in times of COVID-19 pandemic?
- Author
-
Soo, Xiang Yun Debbie, Wang, Suxi, Yeo, Chee Chuan Jayven, Li, Jiuwei, Ni, Xi Ping, Jiang, Lu, Xue, Kun, Li, Zibiao, Fei, Xunchang, Zhu, Qiang, and Loh, Xian Jun
- Published
- 2022
- Full Text
- View/download PDF
34. Bicomponent Meltblown Nonwovens and Fibre Splitting.
- Author
-
Sun, Christine (Qin), Dong Zhang, Yanbo Liu, and Jihua Xiao
- Subjects
MELTBLOWN textile manufacturing ,POLYPROPYLENE fibers ,POLYETHYLENE ,THERMOPLASTICS ,TEXTILES ,WATER - Abstract
Side-by-side bicomponent meltblown fibre webs are produced on Reicofil® bicomponent (bico) meltblown line at TANDEC using polypropylene (PP), polyethylene (PE), polyethylene terephalate (PET), polybutylene terephthalate (PBT), polyamide (PA), polytrimethylene terephthalate (PTT), polylactide (PLA), etc. In this study, fibre splitting of the bico meltblown webs is investigated by several approaches, including hydroentanglement, hot water treatment, benzoic acid treatment, and alkali treatment. The web properties and the interfacial adhesion within the bico fibre are also discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
35. One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal
- Author
-
Ching-Wen Lou, Fei Sun, Hai-Tao Ren, Jia-Horng Lin, Ting-Ting Li, Xixi Cen, and Qi Lin
- Subjects
Materials science ,Fabrication ,Polymers and Plastics ,bark-like imitated ,filtration performance ,One-Step ,Article ,law.invention ,lcsh:QD241-441 ,chemistry.chemical_compound ,lcsh:Organic chemistry ,law ,one-step ,Thermal stability ,Polycarbonate ,Filtration ,Polypropylene ,chemistry.chemical_classification ,nanofibrous ,General Chemistry ,Polymer ,meltblown ,Membrane ,chemistry ,Chemical engineering ,visual_art ,visual_art.visual_art_medium - Abstract
A bark-like imitated polypr opylene (PP)/polycarbonate (PC) nanofibrous membrane was constructed by one-step meltblown technique for efficient particulate matter (PM) removal. The effects of PC content (0%, 1%, 3%, 5%, and 7%) on membrane thermal stability, microscopic characteristics, filtration performance, hydrophilicity, and water vapor transmission were investigated. The results demonstrated that using facile design of incompatibility and viscosity difference between PC and PP polymers decreases average fiber diameter, creating a bark-like groove appearance and increasing surface potential, making a new PP/PC membrane with high filtration performance. The resultant PP/PC membrane had finer average fiber diameter of 0.63 &mu, m, which was nearly 89.41% lower than PP membranes (5.95 &mu, m), and its quality factor (0.036 Pa&minus, 1) was nearly 2.12 times than that of PP membranes (0.017 Pa&minus, 1) with the die hole diameter of 0.5 mm. This fabrication technique of a special meltblown filter membrane saves the cost of die retrofitting and post-processing, which provides an innovative method for particulate efficient removal of high efficient filters.
- Published
- 2019
36. Non-woven textiles for medical implants: mechanical performances improvement.
- Author
-
Lequeux A, Maze B, Laroche G, and Heim F
- Subjects
- Tensile Strength, Prostheses and Implants, Textiles
- Abstract
Non-woven textile has been largely used as medical implant material over the last decades, especially for scaffold manufacturing purpose. This material presents a large surface area-to-volume ratio, which promotes adequate interaction with biological tissues. However, its strength is limited due to the lack of cohesion between the fibers. The goal of the present work was to investigate if a non-woven substrate can be reinforced by embroidery stitching towards strength increase. Non-woven samples were produced from both melt-blowing and electro-spinning techniques, reinforced with a stitching yarn and tested regarding several performances: ultimate tensile strength, burst strength and strength loss after fatigue stress. Several stitching parameters were considered: distance between stitches, number of stitch lines (1, 2 or 3) and line geometry (horizontal H, vertical L, cross X). The performance values obtained after reinforcement were compared with values obtained for control samples. Results bring out that reinforcement can increase the strength by up to 50% for a melt-blown mat and by up to 100% for an electro-spun mat with an X reinforcement pattern. However, after cyclic loading, the reinforcement yarn tends to degrade the ES mat in particular. Moreover, increasing the number of stitches tends to fragilize the mats., (© 2022 Walter de Gruyter GmbH, Berlin/Boston.)
- Published
- 2022
- Full Text
- View/download PDF
37. Controlled Degradation of Commercial Resin for Meltblown Nonwoven Fabric Sheet Production.
- Author
-
Sasai, Yuya, Iizuka, Yoshio, Osada, Kaho, and Taki, Kentaro
- Subjects
- *
NONWOVEN textiles , *NUSSELT number , *SCREWS , *MARKETING costs , *POLYPROPYLENE , *BARRELS , *ROTATIONAL motion , *POLYMER melting - Abstract
Manufacturing meltblown nonwoven fabrics requires special grades of resin with very low viscosity, which are not dealt with so much on market and cost quite high compared to the standard grades. We propose a high-shear rate processing method that can quickly and easily produce such low-viscosity resin from the commercial one without using organic peroxides. In this method, we apply high-shear stress to molten resin by using a high-shear extruder, which is a single screw extruder with high screw rotation speed, and the resin is thermally decomposed of its shear-induced heat which is quickly generated. We found that polypropylene with a value of melt flow rate over a thousand, which was required for the meltblown process, was produced from the standard grade with the high-shear extruder at the screw rotation speed of 3600 min − 1 and the barrel temperature over 300 ∘ C. Using the degradated polypropylene, a meltblown nonwoven fabric sheet was successfully fabricated. We also developed a numerical simulator of the high-shear extruder which can handle a wide range of the screw rotation speed and barrel temperature by the Nusselt number modulated with the operational conditions. The experimental values of the zero-shear viscosity and temperature at the exit of the extruder agreed well with the simulation results. Our high-shear rate processing method will enable us to quickly and easily produce various meltblown nonwoven fabric sheets at low costs. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
38. 熔喷非织造技术的新发展.
- Author
-
杨康, 吴丽莉, and 陈廷
- Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2015
39. Effect of Process Control Parameters on the Filtration Performance of PAN–CTAB Nanofiber/Nanonet Web Combined with Meltblown Nonwoven.
- Author
-
Kang, Hyo Kyoung, Oh, Hyun Ju, Kim, Jung Yeon, Kim, Hak Yong, and Choi, Yeong Og
- Subjects
- *
PRESSURE drop (Fluid dynamics) , *AIR flow , *AIR filters , *THERMAL properties , *SURFACE area - Abstract
Nanofibers have potential applications as filters for particles with diameters <10 μm owing to their large specific surface area, macropores, and controllable geometry or diameter. The filtration efficiency can be increased by creating nanonets (<50 nm) whose diameter is smaller than that of nanofibers. This study investigates the effect of process conditions on the generation of nanonet structures from a polyacrylonitrile (PAN) solution containing cation surfactants; in addition, the filtration performance is analyzed. The applied electrospinning voltage and the electrostatic treatment of meltblown polypropylene (used as a substrate) are the most influential process parameters of nanonet formation. Electrospun polyacrylonitrile–cetylmethylammonium bromide (PAN–CTAB) showed a nanofiber/nanonet structure and improved thermal and mechanical properties compared with those of the electrospun PAN. The pore size distribution and filter efficiency of the PAN nanofiber web and PAN–CTAB nanofiber/nanonet web with meltblown were measured. The resulting PAN–CTAB nanofiber/nanonet air filter showed a high filtration efficiency of 99% and a low pressure drop of 7.7 mmH2O at an air flow rate of 80 L/min. The process control methods for the nanonet structures studied herein provide a new approach for developing functional materials for air-filtration applications. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
40. The role of pKa, log P of analytes, and protein matrix in solid-phase extraction using native and coated nanofibrous and microfibrous polymers prepared via meltblowing and combined meltblowing/electrospinning technologies.
- Author
-
Raabová, Hedvika, Erben, Jakub, Chvojka, Jiří, Solich, Petr, Švec, František, and Šatínský, Dalibor
- Subjects
- *
SOLID phase extraction , *EXTRACELLULAR matrix proteins , *POLYMERIC sorbents , *POLYMERS , *TANNINS , *METOPROLOL , *ASPIRIN , *POLYAMIDES - Abstract
Effect of physicochemical properties including dissociation constant (pKa) and partition coefficient (log P) of the compounds on their extraction efficiency in sample preparation using fibrous polymer sorbents has been demonstrated. Poly-ε-caprolactone as meltblown/electrospun composite fibers, and polypropylene, polyethylene, poly(3-hydroxybutyrate), poly(lactic acid), and polyamide 6 in the meltblown fiber format were used as sorbents in solid-phase extraction. In addition, the polycaprolactone fibers were coated with dopamine, dopamine combined with heparin, and tannin, respectively, to modify their extraction properties. These fibers that were not yet used for extractions and the unique combination of sorbents and analytes significantly extends the scope of nanofibrous extraction. The extraction efficiency was determined using model pharmaceuticals including acetylsalicylic acid, moxonidine, metoprolol, propranolol, propafenone, diltiazem, atorvastatin, and amiodarone. These model compounds displayed the widest differences in both pKa and log P values. The extraction efficiency of some of the fibers reached 96.64%. Coating of polycaprolactone fibers with dopamine significantly improved extraction efficiency of slightly retained metoprolol while moxonidine was not retained on any sorbent. The fibrous sorbents were also tested for extraction of pharmaceuticals in bovine serum albumin and human serum, respectively, to demonstrate their capability to extract them from a complex protein-containing matrix. The clean-up efficiency of our fibers was compared with that of a commercial restricted access media (RAM) C-18 alkyl-diol silica column. Our technique is in accordance with the requirements of modern sample preparation techniques. [Display omitted] • Various fibrous polymers were used for on-line solid-phase extraction of drugs. • Polyphenol-coated micro-/nanofibers were fabricated. • Effect of analyte log P and pKa on their retention was studied. • The application of fibrous sorbents for proteinaceous matrixes was discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
41. Nonwoven polyolofin ve doğal keten/jüt takviyeli hibrit kompozitlerde iki farklı nonwoven üretim yönteminin malzemenin mekanik özelliklerine etkisi
- Author
-
Kocamış, Uğur Ömer, Sayer, Sami, Malzeme Bilimi ve Mühendisliği Anabilim Dalı, and Fen Bilimleri Enstitüsü
- Subjects
Polipropilen ,Composite ,PP ,Spunbond ,Hybrid ,Hibrit ,Mühendislik Bilimleri ,Mekanik Özellik ,Polyethylene ,Nonwoven ,Polietilen ,Mechanical Properties ,Meltblown ,Engineering Sciences ,PE ,Polypropylene ,Kompozit - Abstract
Bu çalışmada doğal lif takviyeli hibrit kompozitlerin mekanik özellikleri üzerinde hibrit liflerin ve matris malzemesi olan nonwoven kumaşların farklı üretim yöntemi ile imal edilmiş olmasının etkisinin analizine odaklanmıştır. Doğal hibrit takviyeli ve polimer matrisli kompozit numuneler üretilerek mekanik özellikleri incelenmiştir. Takviye elemanları olarak jüt ve keten kumaşları kullanılırken, matris elemanı olarak polietilen (PE) film ve polipropilen (PP) nonwoven kumaşlar seçilmiştir. Polipropilen nonwoven kumaşların üretim yöntemleri meltblown ve spunbond olarak farklı iki kategoriden seçilmiştir. Deney sonuçlarının sağlamasını daha güvenilir yapmak adına farklı yoğunluk seviyelerindeki nonwoven kumaşlar kullanılarak deney farklı seviyelerde mukayese edilmiştir ve ayrıca farklı kütle/alan özelliğine sahip nonwoven kumaşların da kompozit malzemeye olan etkisi incelenmiştir. Jüt ve keten kumaşlarının yüzeyi, matrisi ile uyumluluğu arttırmak için alkali işlemle modifiye edilmiştir. Hibrit kompozitleri karakterize etmek için ASTM ve DIN standartlarına göre deneysel çekme, eğilme ve darbe testleri yapılmıştır. Son olarak, test edilen numunelerin kırılma yüzeyini incelemek için bir taramalı elektron mikroskobu (SEM) kullanılmıştır. Bulgular üretilen kompozit numunelerin saf HDPE ile kıyaslandığında dayanımı arttırtığını göstermektedir. Fakat kompozit numunelerin kendi içersinde kıyaslanması, Spunbond yöntemi ile üretilen nonwoven yüzeyli hibrit kompozitlerin Meltblown ile üretilenlerden daha mukavim olduğu ve sonuçlarının daha stabil olduğunu ortaya koymaktadır. Ayrıca gramaj farkının SB numunelerinde ters orantılı bir etkiye sebep olduğu, MB numunelerinde ise ayırt edici bir özellik olmadığı gözlemlenmiştir., The present study is focused on the analysis of the effect of hybridization and the effect of two different manufacturing methods for nonwoven polymer matrix on the mechanical properties of natural fiber-reinforced hybrid composites. Natural fiber-reinforced hybrid composite samples with polymer matrix were manufactured and mechanical properties were investigated. Reinforcement materials were jute and flax, matrix polymers were polyethylene films and nonwovens made of polypropylene. PP nonwovens were manufactured by two different method which were meltblown and spunbond. Several densities of nonwovens were used for reliable experiment results and also effect of different mass/area ratio nonwovens on mechanical properties of composite material was investigated. The surface of jute and flax reinforcements has been modified by alkali treatment in order to enhance the compatibility with the matrix. Experimental tensile, flexural and impact tests were performed according to ASTM and DIN standards to characterize the new intralaminar hybrid composites. Finally, a scanning electron microscopy (SEM) was used to examine the fracture surface of the tested specimens. The results indicates that the composite samples increase the strength compared to pure HDPE. However, the comparison of composite samples among themselves shows that hybrid composites by Spunbond nonwoven method are more durable and stable than those produced by Meltblown. In addition, it was observed that the weight difference caused an inversely proportional effect in the SB samples, but it was not a distinguishing feature in the MB samples.
- Published
- 2019
42. Meltblown technology for high efficiency air filtration
- Author
-
Anonymous
- Subjects
Meltblown - Published
- 2018
- Full Text
- View/download PDF
43. Study and development of new fibrous medias : application to aerosol filtration
- Author
-
Rungiah, Selven, Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Génie et Matériaux Textiles (GEMTEX), Ecole nationale supérieure des arts et industries textiles de Roubaix (ENSAIT), Université de Lorraine, Dominique Thomas, Jean-Christophe Appert-Collin, and Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)
- Subjects
Nonwoven ,Meltblown ,Nontissé ,[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering ,Islands-in-the sea fiber ,Spunbond ,Filtration ,Submicron fiber ,Fibres submicroniques ,Fibres îles-en-mer - Abstract
The goal of the thesis is the study and development of fibrous media with ultrafine fibers through the use of nano-meltblown technology as well as the use of bicomponent islands-in-sea fibers. This approach involves dual work, both on obtaining ultrafine fibers and on the homogeneity of fibrous media. Indeed, for each technology, the elaboration of a fibrous media induces heterogeneities. The origin of this heterogeneity is multiple: distribution of filament diameters, local variation in thickness, packing density or basis weight. This led us to carry out a study and a modeling of the filtration performance in order to better understand the impact of ultrafine fibers and the heterogeneity of fibrous media in air filtration. Most of filtration models (permeability and efficiency) consider an ideal fibrous media with monodisperse fibers and a homogeneous distribution of matter within the fibrous media. In reality, these conditions are rarely met, so understanding the influence of different heterogeneities on filtration performance can be an important issue to improve the performance of filtering media. The modeling of this heterogeneity is based on the correction of the models of effectiveness of the literature from the experimental data; L’objectif de la thèse est l’étude et le développement de médias fibreux avec des fibres ultrafines à travers l’utilisation de la technologie nano-meltblown ainsi que de l’utilisation de fibres bicomposantes îles-en-mer. Cette approche implique un double travail, à la fois sur l’obtention de fibres ultrafines et sur l’homogénéité des médias fibreux. En effet, pour chaque technologie, l’élaboration d’un média fibreux induit une certaine hétérogénéité. L’origine de cette hétérogénéité est multiple : distribution des diamètres des filaments, variation locale de l’épaisseur, de compacité ou de la masse de fibres. Ce qui nous a conduit à mener, en parallèle des travaux d’élaboration de médias, une étude et une modélisation des performances de filtration afin de mieux comprendre l’impact des fibres ultrafines et de l’hétérogénéité des médias fibreux en filtration de l’air. La majorité des modèles de filtration (perméabilité et efficacité) considèrent, en effet, un média fibreux idéal avec des fibres monodisperses et une répartition de matière homogène au sein du média fibreux. Or, en réalité, ces conditions sont rarement réunies, ainsi comprendre l’influence des différentes hétérogénéités sur les performances de filtration peut s’avérer un enjeu important pour améliorer les performances des médias filtrants. La modélisation de cette hétérogénéité se fonde sur la correction des modèles d’efficacité de la littérature à partir des données expérimentales
- Published
- 2017
44. Farklı yöntemlerle üretilmiş dokusuz yüzeylerin akustik özelliklerine etki eden faktörlerin araştırılması
- Author
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Çelikel, Dilan Canan, Babaarslan, Osman, Çukurova Üniversitesi, Fen Bilimleri Enstitüsü, Tekstil Mühendisliği Anabilim Dalı, and Tekstil Mühendisliği Anabilim Dalı
- Subjects
Nonwovens ,Tekstil ve Tekstil Mühendisliği ,Textile and Textile Engineering ,Dokusuz Yüzeyler ,Ses Absorbsiyonu ,Meltblown ,Geçirgenlik Özelliği ,Bicomponent Fibers ,Sound Absorption ,Spunbond ,Sonsuz Elyaf Serme Yöntemi ,Permeability ,Bikomponent Lifler - Abstract
Bu tez çalışması ile ses yalıtımında kullanılmak üzere, özellikle otomotiv sektörü için, ticari tekstil ürünlerine alternatif olarak birim ağırlığının düşük olması, performans ve üretim aşamalarının kısa olması avantajlarıyla ideal ses absorbe edici özellikte, SMS tipi katmanlı dokusuz yüzey malzemenin niteliklerini belirlemek amaçlanmıştır. Bu amaçla; polyester ve polipropilen hammaddeden üretilmiş, homokomponent ve bikomponent yapıdaki yuvarlak ve trilobal lif kesitlerinde, düz veya noktalı kalenderleme uygulanmış, 7 farklı kumaş gramajına sahip toplamda 49 adet katmanlı dokusuz yüzey numunesi elde edilmiştir. Bu numunelerin, ses yalıtım performansını değerlendirmek üzere hava geçirgenliği, ses absorbsiyonu ve gözenek boyutu ölçümlerinin yanında patlama mukavemeti, kopma mukavemeti gibi mekanik performans özellikleri de incelenmiştir. Design Expert 9 paket programı kullanılarak istatistiksel analizler yapılmıştır. Çalışmanın sonucunda bikomponent yapılı liflerin filament serme yöntemine göre üretilen dokusuz yüzeylerde ses absorbsiyonunu iyileştirdiği, bu durumun yüzeylerin hava geçirgenliği ve gözenek yapısı ile ilişkili olduğu belirlenmiştir. Yüksek frekanslar için artan gramajlarda azalan gözenek boyutu ve hava akımına karşı direncin artmasıyla birlikte akustik özelliklerin geliştiği saptanmıştır. Bu durumu lif kesit şekli ve lif yapısının bikomponent veya homokomponent oluşunun etkilediği belirlenmiştir. Anahtar Kelimeler: Dokusuz Yüzeyler, Sonsuz Elyaf SermeYöntemi, Bikomponent Lifler, Ses Absorbsiyonu, Geçirgenlik Özelliği In this thesis work, it is aimed to investigate the properties of SMS type multilayer nonwovens for sound insulation as an alternative product to commercially used materials with the production and short production line advantages. For this purpose; flat and point calendered, in round and trilobal fiber cross-sectional shapes of homocomponent and bicomponent structures produced from polyester and polypropylene fibers, totally 49 multilayer nonwoven samples with 7 different fabric weights were obtained. In order to evaluate the sound insulation performance of these samples, mechanical performance characteristics such as air permeability, sound absorption coefficient and pore size measurements as well as bursting strength resistance and breaking strength were determined with standart test procedures. All test results obtained from the tests were analyzed statistically by using Design Expert 9 package program. As the result, the sound absorption properties were improved by bicomponent fibers in spunmelt nonwovens, and it had a high correlation with air permeabilty and pore sizes. For high frequency ranges, sound absorbing performance of nonwovens became better with the increase of fabric weight per unit area, decrease of air flow resistance and pore sizes. It was effected by the fiber cross-sectional shape and the fiber type of homocomponent or bicomponent type.Key Words: Nonwovens, Spunbond, Meltblown, Bicomponent Fibers, Sound Absorption, Permeability 294
- Published
- 2017
45. Medikal dokusuz yüzey yapılarının geliştirilmesi ve özelliklerinin incelenmesi üzerine bir araştırma
- Author
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Aktekeli, Hatice, Duran, Deniz, Tekstil Mühendisliği Anabilim Dalı, and Fen Bilimleri Enstitüsü
- Subjects
Medikal Tekstiller ,Medical Nonwovens ,Tekstil ve Tekstil Mühendisliği ,Textile and Textile Engineering ,Çok Katlı Dokusuz Yüzeyler ,Eriyik Üfleme Yöntemi ,Medikal Dokusuz Yüzeyler ,Multilayer Nonwovens ,Needle Punching ,Meltblown ,İğneleme Yöntemi ,Medical Textiles - Abstract
Son yıllarda nonwoven tekstillerin tıp alanındaki uygulamaları, kullanımlarının kolay olması ve hijyene verilen önemin artması gibi sebeplerden dolayı artmıştır. Bu çalışmada, kırık tedavisinde çok kullanılan alçıların ya da ortopedik bandajların altında kullanılmak üzere çok katlı nonwoven yapılar geliştirilmiştir. Bu geliştirmenin amacı kişiye daha iyi konfor ve kullanım kolaylığının sağlanmasıdır. Yün, viskon, polipropilenin hammadde olarak kullanılmasıyla meltblown ve iğnelenmiş nonwoven yapılar geliştirilmiş, daha sonra bu yapıların bazıları spunbond katmanlar ile de birleştirilmiştir. Geliştirilen çok katlı nonwoven yapılara gramaj, kalınlık, hava geçirgenliği, eğilme direnci ve su buharı geçirgenliği testleri yapılmıştır. Sonuçlar daha sonra SPSS yazılımı kullnılarak tek yönlü varyans analizi ile istatistiksel olarak değerlendirilmiştir. Elde edilen sonuçlar; çok katlı nonwoven yapıların kırık tedavisinde alçı ve ortopedik bandajların altında pamuk ya da sentetik pedin yerine kullanılmaya uygun olduğunu göstermiştir., During the last decades, nonwoven textiles have become widely used in the medical field due to their ease of use and due to the recent increase in the importance given to hygiene. In this study, multilayer nonwoven structures were developed in order to be used under the orthopedic bandages and plaster casts which are widely used in the fracture treatment. The aim of this development is to give more comfort and ease in use to the wearer. Wool, viscose and polypropylene were used as raw materials and multilayer nonwoven structures were produced by using meltblown and needling methods, then some samples were also combined with spunbond layers. Basis weight, thickness, air permeability, bending rigidity and water wapor permeability tests were applied to the multilayered nonwovens and the results were evaluated statistically by One Way Anova Test, using SPSS software. The obtained results have shown that; multilayer nonwoven structures which can be used in the fracture treatment are good candidates to be replaced by cotton or syntetic pads since they provide better comfort to the user.
- Published
- 2017
46. Migration Effects of Fluorochemical Melt Additives for Alcohol Repellency in Polypropylene Nonwoven Materials.
- Author
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Lavoie JH, Rojas OJ, Khan SA, and Shim E
- Abstract
The use of bulk polymer melt additives provides a facile, industrially relevant approach to tailor properties of polymer surfaces for many different applications. These melt additives, when blended with polymers prior to melt spinning, migrate to the fiber surface and influence surface functionality. While the use of bulk polymer melt additives to impart hydrophilicity or oleophobicity is well studied, the impact of the fiber formation process on additive migration and resultant repellency of nonwoven media products remains largely unexplored. In this study, we produce fluorochemical melt additive containing meltblown nonwovens, and establish methods for characterization of fiber mat surface composition and repellency. Repellency of low surface tension fluids is a significant challenge and is of particular importance in the creation of medical garments such as surgical gowns and masks which must perform as liquid barriers even when exposed to alcohol based solutions. Similarly, melt additives are also used in the production of electret air filtration devices. Electret filters are imbued with charges to enhance particle capture performance, but this charge can be negated through wetting by low surface tension fluids. To address this challenge, the changing composition of fiber surfaces due to the migration of additives is monitored via X-ray Photoelectron Spectroscopy, then related to repellency of alcohol solutions by contact angle analysis. We demonstrate that for the samples tested a fluorine to carbon (F/C) ratio of 0.35 is sufficient to prevent wicking of isopropanol droplets, and higher surface tension fluids could be repelled by fiber mats with lower fluorine content. Through the use of cross-sectional ToF-SIMS analysis, we find that migration of additives is key to the performance of samples with low additive loadings, and that these phenomena are heavily influenced by many nonwoven manufacturing parameters including fiber size, die-to-collector distance, and polymer resin melt flow rates.
- Published
- 2020
- Full Text
- View/download PDF
47. One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal.
- Author
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Li, Ting-Ting, Cen, Xixi, Ren, Hai-Tao, Sun, Fei, Lin, Qi, Lou, Ching-Wen, and Lin, Jia-Horng
- Subjects
- *
PARTICULATE matter , *MEMBRANE separation , *POLYPROPYLENE , *MEMBRANE filters , *SURFACE potential , *POLYCARBONATES - Abstract
A bark-like imitated polypr opylene (PP)/polycarbonate (PC) nanofibrous membrane was constructed by one-step meltblown technique for efficient particulate matter (PM) removal. The effects of PC content (0%, 1%, 3%, 5%, and 7%) on membrane thermal stability, microscopic characteristics, filtration performance, hydrophilicity, and water vapor transmission were investigated. The results demonstrated that using facile design of incompatibility and viscosity difference between PC and PP polymers decreases average fiber diameter, creating a bark-like groove appearance and increasing surface potential, making a new PP/PC membrane with high filtration performance. The resultant PP/PC membrane had finer average fiber diameter of 0.63 μm, which was nearly 89.41% lower than PP membranes (5.95 μm), and its quality factor (0.036 Pa−1) was nearly 2.12 times than that of PP membranes (0.017 Pa−1) with the die hole diameter of 0.5 mm. This fabrication technique of a special meltblown filter membrane saves the cost of die retrofitting and post-processing, which provides an innovative method for particulate efficient removal of high efficient filters. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
48. Investigation of Hydrostatic Pressure and Blood Penetration of a Nonwovens Material.
- Author
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Tsai, Peter P. and Yurong Yan
- Abstract
Disposable materials receive an annually steady growth in the field of medical applications as surgical gowns, isolation gowns, and medical drapes to avoid the cross contamination from the repeated use of a durable protective apparel in a hospital. There are four levels of liquid barrier performance according to ANSI/AAMI PB70:2012¹ in terms of liquid impact penetration, hydrostatic pressure, and blood penetration. SMS (spunbond, meltblown, spunbond) materials and porous membranes are widely used as medical protective clothing. SMS materials are usually made to achieve up to Level 3, which requires a hydrostatic pressure of greater than 50 cm. Above that, Level 4 requires the liquid barrier property that resists to the penetration by blood, in which a porous membrane is employed to laminate with a substrate. The objective of this paper is to use the pore size to estimate the hydrostatic pressure, and further to correlate the hydrostatic pressure with the resistance to blood penetration. Theories were successfully applied to calculate the pore size and the hydrostatic pressure of a fibrous material and to correlate the hydrostatic pressure with the blood penetration. The requirement of the fiber fineness capable of resisting to the penetration of blood was also calculated. [ABSTRACT FROM AUTHOR]
- Published
- 2015
49. 可降解聚乳酸熔喷超细纤维空气滤材的制备.
- Author
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常敬颖, 李素英, 张旭, 仇何, 黄婷婷, and 张瑜
- Abstract
Copyright of China Textile Leader is the property of China Textile Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2016
50. 3D Micro-Nano Fibrous Scaffold for Bone Tissue Engineering.
- Author
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Erben, Jakub, Pilařová, Kateřina, Sanetrník, Filip, Chvojka, Jiří, Horáková, Jana, Blažková, Lenka, Košťáková, Eva, Havlíček, Jiří, Mikeš, Petr, Lukáš, David, and Jenčová, Věra
- Abstract
This study aims to a novel composite material for tissue engineering consisting of microfibers produced by meltblown technology ensuring optimal threedimensional porous structure and sufficient mechanical properties, electrospun nanofibers for good cell adhesion and particles enhancing increasing the biological activity and mineralization of regenerated bone tissues. The preliminary in-vitro tests showed the high potential of developed composite materials in TE - good porosity of the tested materials allows osteoblasts to proliferate into the sample inner structure with the significant contribution of nanofibers content to the cell proliferation rate. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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