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5. Circular textiles: building business case scenarios through stakeholder dialogue

Author

Matthes, André, Schneider, Katja, Cebulla, Holger, Marlen Gabriele, Arnold, Schumann, Anton, Hall, Nicholas, Boiten, Valérie, Matthes, André, Schneider, Katja, Cebulla, Holger, Marlen Gabriele, Arnold, Schumann, Anton, Hall, Nicholas, and Boiten, Valérie

Abstract

This book illustrates key sustainability issues in global textile and fashion value chains, by examining individual types of fibers either at a single step in or along the entire value chain.

Published
2019

7. Microoptical telescope compound eye

Author

Duparré, Jacques, primary, Schreiber, Peter, additional, Matthes, André, additional, Pshenay-Severin, Ekaterina, additional, Bräuer, Andreas, additional, Tünnermann, Andreas, additional, Völkel, Reinhard, additional, Eisner, Martin, additional, and Scharf, Toralf, additional

Published
2005
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8. Analysis and simulation of yarn feeding at high dynamic circular knitting machines.

Author

Matthes, André, Pusch, Thomas, and Cherif, Chokri

Subjects
KNITTING machines, HOSIERY, YARN, INDUSTRIAL productivity, PRODUCT quality
Abstract

In the area of fine gauge hosiery, machines are available that can operate up to speed of 1,500 rpm. This potential is often not utilized because of quality problems occurring on such high machine and yarn speeds. Especially at the start and stop of the machines, and also due to the small disturbances in the yarn feeding system, it is difficult to maintain controlled conditions. This paper describes an approach to optimize the yarn feeding system on small circular knitting machines. The practical implications of this procedure lead to higher productivity through higher machine speed and better quality of the produced fabrics. [ABSTRACT FROM AUTHOR]

Published
2010

9. Machines for technical textiles.

Author

Hausding, Jan, Abdkader, Anwar, Trümper, Wolfgang, Matthes, André, Pietsch, Kathrin, Shayed, Mohammed A., Heidrich, Tina, Siegmund, Jana, Hoffmann, Gerald, and Cherif, Chokri

Subjects
TEXTILE industry, TEXTILES, CHEMICAL bonds, WARP knitting
Abstract

The article discusses the highlights of the 2011 International Textile Market Association fair held in Barcelona, Spain. Over 100,000 professionals from 138 countries attended the booths of 1,350 companies and research groups from 45 states. Stoll GmbH & Co. KG presented concepts aimed at an increased productivity. Karl Mayer Malimo Textilmaschinenfabrik GmbH and Liba presented their multi-axial stitch-bonding machines parallel to warp-knitting machines.

Published
2012

11. Optimization of feeder parameter on small-diameter knitting machines.

Author

Matthes, André and Cherif, Chokri

Subjects
KNITTING machines, STRUCTURAL optimization, YARN, TEXTILES, MACHINERY testing, QUALITY assurance, EQUIPMENT & supplies
Abstract

The variations in yarn tension occurring on small-diameter knitting machines can be clearly minimized by a feeder and its adjustable parameter that are optimally adapted to the used yarn material. The results show practical approaches for the optimization of the supply quality of the feeder. This leads to a productivity increase in production of circular knitting fabrics due to higher machine speeds and to quality improvements in the fabric. [ABSTRACT FROM AUTHOR]

Published
2011

12. Dynamic analysis of yam supply at circular knitting machines.

Author

Matthes, André, Pusch, Thomas, and Cherif, Chokri

Subjects
YARN, KNITTING machines, PRODUCT quality, KNITWEAR, KNITTING, TEXTILE industry
Abstract

Tension peaks and fluctuations caused by yarn supply devices at yarn speed above 20 m/s on high speed circular knitting machines result in low quality knitwear. The systematic analysis of yarn supply system at a test setup allows the measurement of high dynamic effects on the yarn tension caused by the parts of supply equipment like yarn, bobbin, eyelet, yarn brake (tensioner) and yarn feeder, as well as the whole system. The reduction of yarn tension peaks and fluctuations which result in the improvement of knitwear quality have been achieved from the outcome of the investigations. Selected results of the investigations and basic approaches for the optimization of the supply system are presented. [ABSTRACT FROM AUTHOR]

Published
2010

13. Natural fibers reinforced plastics made of friction spinning hybrid yarns.

Author

Paul, Christian, Diestel, Olaf, Matthes, André, and Cherif, Chokri

Subjects
SPINNING (Textiles), YARN, TEXTILE fibers, FRICTION, THERMOPLASTICS, INDUSTRIAL textiles
Abstract

The OE-friction spinning technology DREF 3000 offers the possibility to manufacture yarns, made of natural fibers and fibrous matrix material in different configurations across the hybrid yarn section. For the industrial fabrication of yarns for natural fibers reinforced plastics with reinforcement fibers aligned in load direction and thermoplastic matrix can therefore close the exciting gap in the field of production of natural fibers reinforced products and the impact properties of parts in combination with glass filaments can also be improved. [ABSTRACT FROM AUTHOR]

Published
2006

14. Naturfaserverstärkte Verbundwerkstoffe aus Friktionsspinnhybridgarnen.

Author

Paul, Christian, Diestel, Olaf, Matthes, André, and Cherif, Chokri

Abstract

Copyright of Technical Textiles / Technische Textilen is the property of dfv Mediengruppe 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
2006

37. Sustainable Chemistry - Path and Goal for a More Sustainable Textile Sector

Author

Kümmerer, Klaus, Keßler, Lisa, Matthes, André, Beyer, Katja, Cebulla, Holger, Arnold, Marlen Gabriele, and Schumann, Anton

Subjects
Textile sectorq, Chemistry, Green Chemistry, Chemicals management, sustainability challenges, Sustainable chemistry
Abstract

This chapter aims to portray the concepts of green chemistry (GC) and sustainable chemistry (SC) with regard to the textile sector and in response to the increasing challenges of the sector in terms of sustainability. It highlights potentials and pitfalls and offers concrete examples and practices of SC relevant for the textile industry. The textile sector is one of the most polluting industries in the world, contributing 20% to total industrial pollution of the water resources. In total, 5 billion kg of dyes, pigments and finishing chemicals are currently in use in the textile industry, adding up to more than 8000 different chemicals utilized for garment production. Moreover, extensive resource use (e.g., fossil fuels, processing chemicals, water etc.) in combination with unhealthy, exploitative working conditions pose a myriad of challenges involving all dimensions of sustainability. Once introduced into a process or product, chemicals and their products of unwanted side reactions and of incomplete mineralization in effluent treatment, so-called transformation products (TPs), are likely to remain a concern throughout the product’s lifecycle and even beyond. For example, textiles at their life’s end, so-called post-consumer textiles, still contain up to 90% of the chemicals that were initially introduced during manufacturing or finishing. This high amount of chemical residues on textiles (only partly washed out during laundry) is not only problematic in terms of resource use, but it is also an environmental threat. Residues are continuously released due to limitations in conventional wastewater treatment and form waste and dump sites affecting human health and well-being. The aforementioned sustainability issues arising during textile production, distribution, use and disposal are inextricably linked to societal and cultural systems. The complex, dynamic and highly intertwined nature of these sustainability challenges in the textile sector calls for both a focus on input prevention of chemicals and a strong normative premise of intentionally beneficial design of chemicals that are not harmful to the environment and human health. Sustainable chemistry has become an emerging concept in response to various sustainability challenges associated with the production, distribution, use and discharge of chemicals and products. It has been acknowledged by UNEP as an important cornerstone in achieving the Sustainable Development Goals (SDGs) and servers as a core concept within the Global Chemical Outlook II. Whilst green chemistry mainly addresses the synthesis of chemicals and some of their properties, SC reaches beyond the disciplinary boundaries of chemicals and their usage by a systems thinking approach. Being both a path and a goal, SC can act a beneficial umbrella concept for addressing the highly complex sustainability challenges regarding chemicals in the textile sector. Its specific potentials for the textile sector have not been studied hitherto and lie in its focus on input prevention, which influences not only production or wet processing of textiles, but the entire supply chain—including up- and downstream users—even beyond the product’s end of life. Practiced of SC within the textile industry addresses spatial as well as temporal scales, flows and dynamics of chemicals, materials and products and hence addresses drivers of highly complex and currently unsustainable practices. Specific examples and practices of SC within the textile sector will be described in-depth such as new business models (e.g. chemical leasing).

Published
2020
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38. Circular textiles: building business case scenarios through stakeholder dialogue

Author

Hall, Nicholas, Boiten, Valérie, Matthes, André, Schneider, Katja, Cebulla, Holger, Marlen Gabriele, Arnold, and Schumann, Anton

Abstract

This book illustrates key sustainability issues in global textile and fashion value chains, by examining individual types of fibers either at a single step in or along the entire value chain.

Published
2019

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