Search

Experiments using pineapple leaf fiber as raw material in paper production have been conducted to assess the advantages in terms of mechanical properties, especially tensile strength, tearing strength and thickness of the paper. In this paper, samples of pineapple leaf fiber is mixed with a recycle newspapers in different composition of which is, 25%, 35%, 45%, 55%, 65% and 75% pineapple leaf fibers mixed with 75%, 65%, 55% , 45%, 35% and 25% of the recycle newspapers. The mixtures have been tested for mechanical properties and thickness by using the Universal Testing Machine (UTM) and micrometers. The results from tensile and tearing tests were then compared with data obtained from previous experiments. Through the observation of the experiment, it was found that the data obtained with similar experiments conducted previously. The results have been proved in tears testing and stress testing. Tearing test data shows that the longer the beating time imposed on the mixture, the lower the tearing force required to tear the paper samples. On the other hand, the tensile test results shows, the longer time beating the bear on the mix, the higher the tensile force should be imposed on the sample. The experimental results can help in the formulation of the pineapple leaf fiber-based paper production in accordance to the usage.

A kind of composite filler was prepared by using talc, 85。SR softwood pulp and CPAM. The effects of talc-fiber composite fillers on paper were investigated. The results showed that the composite fillers mainly adsorbed onto the surface of external fibrillatioed fibrils. Compared with commercial talc, the paper wih composite fillers addition had higher tensile index. It also showed that the composite fillers had some negative influence on drainage effect, when compared with the blank samples. Composite fillers which were prepared at CPAM dosage 0.6% had better effects on preparation of high filler paper.

AKD is an important internal size for paper pulp fiber. With recycled economy development, regenerated paper fiber becomes an important resource. In this paper, AKD is used as a modification aid by internal sizing method. It shows that the change of the dosage of AKD influences regenerated paper fiber Cobb value, but has no influence to paper surface strength. The proper pH value is from 7 to 9. The temperature has no influence to regenerated paper fiber Cobb value and paper surface strength. Appropriate modified starch is good for AKD modification fiber and increase of the surface strength of paper made from modified fiber by AKD. Amphoteric starch is better than cationic starch. Other added substances such as PEI, MPEI and PAE can improve the modification of paper fiber modified by AKD. So the adsorption of modified paper fiber decrease and the surface strength of paper modified fiber increase.

Different degrees of high degree of substitution cationic starch (HCS) were prepared and applied in paper coating. Effects of HCS on coating properties and coated paper properties were investigated, and the comparison of effects of HCS and PDMDAAC was made. The results show that the best amount of HCS in coating formula is between 2% and 4%. When the amount of HCS is 4%, whiteness of coated paper was the highest. The color density was the highest when the amount of HCS is about 4% and the degree of substitution is 0.64. HCS with degree of substitution 0.849 is better than PDMDAAC in some respects, and the print image density achieved satisfactorily.

Carbon fiber paper was coated with multiple layers coating composed by conductive and magnetic fillers. The electromagnetic shielding and conductive properties of the coating were investigated. The effluencing factors such as the ratio of conductive and magnetic fillers, the composition of magnetic fillers, the contrast of coating method, the structure of shielding layer were assessed according with effectiveness. The results showed the best component for the coating layer was: conductive substrate, conductive coating layer and magnetic coating layer sequently. The compound of magnetic fillers with differenet electromagnetic interaction mechanism would produce a complementary magnetic loss, and display a high absorption in broader frequency band. The shielding effectiveness of multi-layer coated carbon fiber paper at 1.5 GHz was shown up to 45 dB.

The main objective of this study was to investigate the effect of drying condition on the binder distribution and characterize the binder migration in the method of numerical and visual analysis by Scanning Electrical Microscopy (SEM), Atomic Force Microscopy (AFM), and Laser Scanning Confocal Microscope (LSCM). In this study, Rhodamine B was used to stain the binder and as the probe to characterize z-directional distribution of the binder using LSCM. The results implied that it was reliable and effective method using LSCM to characterize the z- directional distribution of binder and analyze the influence of dry condition on binder migration. It could be concluded that the dry temperature played an important effect on binder distribution in coated paper and high dry temperature accelerated binder migration to the coating surface, however low drying temperature made binder migrate towards the interior of base paper. Moderate drying is good to binder distribution and coating layer forming.

Traditional cast coated glossy photo paper production process due to its characteristics that the water evaporates from non-coated cast side, so the coating speed is slow, ground paper is non-waterproof paper, therefore the paper products are easy to transmutative, as the cast shows that the formation of dense coatings membrane, the lower ink absorption. To solve such the problems, a novel porous ink receiving layer constituted by a litter amount of a hydrophilic binder(PVA) and a cross-linking agent, a large amount of inorganic pigment(SiO2) and a hollow structural plastic pigment. In this paper, the effects of the hollow structural plastic pigment rheological properties of the color and the printing and preservation properties of ink jet paper were investigated. Because of the thermoplasticity of the plastic pigment the calendering and dry technology were also studied. From the viewpoint of water-fastness and preventing the penetration of binder, the resin coated paper(being so-called RC paper) is selected as the substrate.

Coating pore structure of low gloss coated paper based on different pigment blends was analyzed using mercury intrusion method in this paper. The results show that pore size of coating layer structure of low gloss coated paper ranges from 20nm-500nm, and the range from 500nm-5000nm is mainly from base paper and interactions between coating color and base paper. Printability of coated paper can be well related with coating pore structure. Print gloss is strongly influenced by pore size and pore volume. Large pore diameters and small pore volume of coating layer structure can improve print gloss. Ink density increases with the increasing of pore diameter while the pore volume is kept constant. The increasing of pore volume of coat layer structure will improve capillary absorption and then improve ink absorption. The control of coating pore structure is very important for producing low gloss coated paper.

The physical structure and chemical properties of coating layer have an important influence on transferring and setting of the printing ink. The typical objective of coating is to improve the appearance and printing properties of paper. In this study, the effect of drying condition on coating layer structure, surface properties, and print quality was investigated. The relationship between surface topography and drying condition was explored using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The conclusions were drawn that high and low drying temperature were not good to the paper properties, which resulted in high roughness, low paper gloss, high ink absorption, low print gloss and paper surface efficiency. The findings indicated that the coating drying temperature affected the pore size, depth and distribution of the coated paper surface. Moderate temperature was benefit to pigment particles and binder arranging orderly, which made the coating surface had high smoothness, gloss, paper surface efficiency, and modest ink absorption.

This article studied on these factors which influences the surface strength of packing paper. Through a series of tests, a model has been found. This model could guide the adjustment about fiber composition and beating process. And then a pilot scale test about this model has been carried out in Henan. The conclusion indicated that surface strength, printability and other strength indexes have been improved by adjustment of fiber composition and beating process scientifically. The ratio of softwood pulp has been reduced from 28% to 23%~25%. And the surface strength has been increased from 0.8~1.2m/s to 1.5~1.8m/s. Furthermore, when the ratio of softwood pulp is 23% and chemical-mechancial pulp is 7%, the packing paper still has a good printability.

Fluorescent whitening agent is relatively small dosage in the coating, but it has great influence on the properties of the coating and ink-jet printing qualities. With the increase of fluorescent whitening agent dosage, the PH of the coating rose but the viscosity was hardly to change. The brightness of coated ink-jet printing paper and color density of the printing image firstly presented the trend of increasing then decreasing. What’s more, when the brightness of the coated paper achieved to the maximum, color density and contact angle properties were the largest. Chromatic aberration property of the image reduced from 1.87 to 1.75, when the addition of fluorescent whitening agent rose from 0.1% to 0.5%. While the dosage was rose to 0.9%, chromatic aberration increased to 2.15. The gloss of coated paper decreased with the dosage of fluorescent whitening agent increasing. In sum, fluorescent whitening agent can enhance the brightness of the coated paper as well as the printing properties. The results show that the best brightness and printing qualities of coated ink-jet printing paper are obtained, when the fluorescent whitening agent is 0.5%( relative to pigment).

It is very important to measure paper fiber density and equivalent diameter for pulp suspension as solid-liquid two-phase flow in fluid dynamics study. There are some kinds of ways to measure fiber density，but not be suit for pulp fiber density because of their limitations. By using kajaaniFS300 fiber analyzer provided by Mesto ltd company to compare and measure all kinds of fiber length, fiber coarseness, weight average fiber length can more accurately show the actual length of fiber. The results shows that it is apparently more appropriate to calculate fiber density by using fiber coarseness, weight-average fiber length and weight-average fiber width, and fiber equivalent diameter should also be calculated according to the same weight-average fiber length and weight-average fiber width.

In order to evaluate the practical application effect of the self-made water-based coated paper inkjet ink and to study the influence factors, their printing performance and the influence of the printed material for printing performance is studied. The drying time of coated paper ink and ordinary water-based inkjet ink are measured and compared. Drying process of ink droplet is recorded by video contact angle tester. It is found that the drying rate of the coated paper ink is higher than the ordinary ink and the diffusion of the ordinary ink is severe. The coated paper ink and ordinary ink are printed, and it is found that the former can get better image detail and color reproduction for the picture of human’s face and inanimate object. The coated paper ink can also obtain a better reproduction of tone levels. Coated paper inkjet ink is printed on different coated papers, and the color densities are measured through red, green and blue color filter. The color strength and hue error are obtained to evaluate the color characteristics on different papers. It is concluded that the coated paper inkjet ink can obtain better color on the Henglian gloss coated paper, Sunbrite gloss coated paper and SPCO matt coated paper.

A proprietary in situ chemical vapor deposition (CVD) process was developed to grow a layer of pyrocarbon on carbon paper preform for proton exchange membrane fuel cells (PEMFC). The carbon paper preform is continuously manufactured by dry method. The characteristics of the carbon paper such as surface morphology, polarized light characteristics, and cross-section morphology were characterized using electron microscope, polarized light microscope, respectively. Fuel cell performance of the carbon paper was evaluated using single cell with hydrogen/air at various relative humidity (RH) conditions. The carbon paper with in situ growth of pyrocarbon showed significant improvement in lowering in-plane electrical resistance as well as fuel cell performance at dry condition. The carbon paper as seen under scanning electron microscope showed excellent surface morphology with pyrocarbon connecting carbon fibers tightly by CVD process.

Effect of wood pulp fiber and filler on the mechanical properties and harmful substance of reconstituted tobacco sheet were investigated. Experiments result showed that added lower lignin content pulp reduced phenols produced by reconstituted tobacco sheet combustion. As addition of bleached hardwood kraft pulp and precipitated calcium carbonate (PCC) increased, the amount of phenols release was dropped dramatically, but in order to ensure the normal operation of papermaking mechine, wood pulp and PCC addition should not be more than 20%. If wood pulp addition was above 20%, it had negative effect on the bulk, carbon monoxide and cigarette smoke flavor of reconstituted tobacco sheet; when PCC addition was more than 20%, it has negative effect on the normal operation of papermaking mechine.

The beating characteristic of PPTA fiber and its influence on the performance of paper-based functional materials based on PPTA fiber and resin has been investigated in this study. The results show that the morphology of PPTA-pulp had significant influences on the mechanical and electrical properties of the composites. The sample contained with PPTA fiber of 35 °SR showed the increase in tensile strength, tearing strength and dielectric strength by 147.7%, 119.3% and 69.9% as compared with the untreated PPTA fiber.

Oil palm frond pulp (OPF) was blended with activated carbon for the purpose of active packaging in this preliminary study. It was aimed to investigate the effect of in-situ activated carbon on physical and mechanical properties of the pulp handsheets made from OPF. Testing of property performances of the resulted handsheets included density, moisture content, thickness swelling, folding, tensile strength, %elongation, stiffness, and modulus of rupture. Ultimately, the intention is to use for prospected active packaging for fresh produce. OPF pulp was prepared by the kraft process. The pulp stock was mixed with different proportions of activated carbon (0, 10, 20, and 30% w/w). The results showed that an increased proportion of activated carbon decreased density and thickness selling, but had no effect on moisture content.

A material was made from cement/waste paper/sludge mixture and tests were carried out on it to ascertain its suitability as a ceiling board material. The tests included water absorption, drying shrinkage, flexural strength, thermal conductivity, and compressive strength. The results showed that the material possesses good properties as a ceiling board material.

The wettability of the carbon composite electrode on paper substrate was studied using contact angle measurement. Y-Shield HSF54 carbon composite material were coated on paper substrates with a mask using squeegee coating technique. Contact angles of the ten polar probe liquids with the HSF54 electrodes were measured using a customed-built image acquisition system. With the contact angles obtained for each probe liquid placed on the electrodes, the surface tension of the electrodes was determined using Fox-Zisman theory. The result showed that the critical surface tension of HSF54 carbon composite electrodes was 37.2 mN/m which is considered to be moderately hydrophobic.

Relaxation function can well reflect the microscopic polarization mechanism of dielectric. In order to analyze the influence of moisture and temperature on relaxation function of oil-paper insulation, building a physical model of the oil-paper insulation system containing moisture and obtaining the expression of relaxation function. Setting up a testing device for the oil paper insulation dielectric spectroscopy in the laboratory, the parameter values of relaxation function expression were obtained according to test result by Fourier inverse transformation. The results show that the relaxation function containing three relaxation factors are more suited for the relaxation of oil-paper insulation containing moisture content and microscopic polarization mechanism, moisture and temperature have a significant effect on relaxation function.

In this paper, a kind of fibrous TiO2 has been prepared through hydrothermal synthesis and a paper fabricated from the fibrous TiO2 has been obtained. The composition, morphology, and size of the fibrous TiO2 were characterized by using X-ray diffraction (XRD) and scanning electron microscope (SEM) respectively. And the morphology of the paper was characterized by polarizing microscope. The thickness, softness, and writing properties of the paper were detected by a vernier caliper and a pen. The results indicate that the diameter of the fibrous TiO2 is ~ 200 nm, the thickness of the fabricated paper is ~ 0.35 mm, and the paper can be tolerated writing by a UM-100 ball pen. The excellent properties of the prepared paper may change the applications of fibrous TiO2 in papermaking industry.

By applying sodium hydroxide/urea and a sample freeze drying method, we successfully synthesized green cellulose aerogel from paper waste for the first time. We adjusted the cellulose concentration from 1.5 percents to 4 percents in the initial hydrogel. They yielded densities changing from 0.03-0.1 g/cm3.The absorption capacities varied from 9 to 20 times of their own weight. To investigate the water absorption capacity in relationship with the initial chemical dosage, we changed the input amount of urea and sodium hydroxide, which is the first study ever. The thermal conductivity of the 2 percents sample ranged from 0.029-0.032 W/mK. Besides, the material has a high potential to be used in diaper industry as it is biodegradable which is better than most super absorbent polymers.

Antibacterial paper for packaging was sprayed by nanochitosan as antibacterial ingredients. The bacteriostatic circle method was adopted to evaluate its antibacterial effect on E.coli and Staphylococcus aureus. We investigated the effects of different concentrations of nanochitosan on antibacterial paper thickness, tensile strength, bursting strength, folding strength and antibacterial properties.The results showed that: tensile strength, bursting strength and folding strength of the antibacterial paper is better than the control paper and the thickness has no obvious change. The antibacterial paper enhanced the antibacterial effect following the increasing concentration of nanochitosan. The same concentration of nanochitosan antibacterial paper, its inhibitory effect on E.coli was greater than that of Staphylococcus aureus.

Fluorocarbons were added into the mixture of modified starch and sodium alginate to get uniform coating solution, and the solution was then coated on the surface of transparent paper. The color as well as grease barrier property of paper at different coating weight were studied. The results showed that color under different coating weights were not significantly different from base paper. The scanning electron microscopy (SEM) diagram showed the surface of paper became smoother and more homogeneous as the coating weight increased. The grease barrier property of coated papers were significantly improved compared with base paper according to Tappi-559 kit test. A highest grease rating number of 12 was obtained when the coating weight became 3.3 g/m2. The dynamic changes in contact angle studies revealed that the contact angle of the base paper was continuously decreased from 29.41 °minutes to 23.46 °within 20, the contact angles of coated papers were significantly increased, and reaching a steady state within 2min with the maximum rate of contact angle change was of merely 0.06 ° / min.

Four kinds of thermal transfer paper with different paper characteristics were chosen, main properties including absorbability, air permeability, roughness, whiteness, formation and ash content were tested. Same ink color pieces were printed on these samples through colour printer, then these ink color pieces were transferred onto the same fabric based on the magnetic heat press machine, contrasting color transfer rate, gloss, adhesion and other indicators, the general law of paper performance on transfer quality was discussed. Research shows absorbability, roughness and air permeability will directly affect the quality of thermal transfer quality. Lower roughness and absorbability as well as moderate permeability have a significant role to improve the heat transfer quality. The result offers a certain theoretical reference and practical guidance to the selection, research and development of thermal transfer paper.

The analysis of all kinds of selected chemicals, mixed starch was donethrough a specific process and orthogonal experiments. The best proportion ofthe new type of surface sizing agent was prepared through the glue applicationexperiments, testing paper physical properties. The results showed that thebest formula of surface sizing agent including borax, sodium silicate,anhydrous sodium sulfate, ferrous chloride which ratio is 3:4:2:1. At the sametime modifying agent was added so that the stable performance can be obtainedfrom the solid surface sizing agent. Homemade solid surface sizing agent canmake paper greatly improve the sizing degree, increased by 50.9%, the stiffnessof the tear strength increased by 56.7%, folding degrees increased by 53.0%.Compared with the surface sizing agent market, various aspects index improvedsignificantly.

Waterbased phenol-formaldehyde (PF) resin was prepared and applied to enhance the mechanical strength of aramid paper in this paper. The water dilution stability of prepared PF resin was studied. The chemical structure and the thermal stability of prepared PF resin were characterized. The comprehensive performances of aramid paper before and after strengthen by PF resin were tested. The Micro-morphology of aramid paper was observed by Scanning electron microscopy (SEM0. The results shows that the comprehensive performances of aramid paper were greatly enhanced after being strengthen by PF resin. Its expected that the prepared PF resin has promising application in aramid paper industry.

In order to analyze the ageing mechanism of oil-paper, the Atomic Force Microscope (AFM), which is one of the important instruments in nanometer area, was used in this paper for the analysis of the micro surface morphology, and a 3-D surface roughness analysis on the AFM image was presented. The AFM figures indicates that the molecular arrangement of the initial cellulose paper is close and ordered, some of the hexagonal mesh structures of the D-glucopyranose units were broken down after 100 days accelerated thermal ageing. The roughness analysis indicates that he fiber surface roughness parameter Sa increases with the deepening of ageing degree. Special attention should be paid on the increase in the surface roughness of insulation paper, as it will aggravate the oil streaming electrification when the paper is applied to the power transformers.

In this experiment, we use corn starch as the main raw material and use Mid-Temperature a-amylase to modifie it. The influnce of temperature and time to viscosity of the enzymatic starch were discussed. In this way, we can get the optimal conditions about enzymatic modification. According to testing properties of the paper ,we know about its surface sizing effect. At last,we explored the influnce of AKD to surface sizing. The results showed that the optimal conditions are as follows: the optimal enzyme reaction temperature of 65 °C and the ptimal enzyme reaction time of 20min under the condition that the substrate concentration of 20%, the dosage of enzyme of 0.02%, the dosage of calcium chloride of 0.04%, pH 6, gelatinization temperature of 95 °C, and gelatinization concentration of 10%.Under this condition, the viscosity of starch paste is 11mPas. Compared with original paper, sizing increased by 16.20%, burst index increased by 10.50%, tensile index increased by 12.60%. The AKD can significantly improve the degree of sizing, compared with the original paper, the degree of sizing increased by 26.5%.

In order to know the coating effect and application of color ink-jet paper, the coating formula and printing quality of ink-jet paper were deeply studied. First of all, the coating liquid was prepared by dispersing and mixing the nanometer pigment, the adhesive and the other additives. Then the properties of ink-jet paper were tested and their surface profiles were characterized and evaluated with scanning electron microscope. Finally, the coating paper samples and the base papers were all printed with color ink-jet printer and measured with a spectrodensitometer. The study result showed that it can gain well coating and printing quality when the ratio of SiO2and TiO2is 3:1 and the content of PVA adhesive is 50%, especially paper whiteness is obviously higher than that before the coating.

nanofibrillation of the oil palm empty fruit bunches, EFB, by synergizing the alkaline peroxide chemicals and a subsequent refining process was found to liberate useful fibrous mass. Of these, the nanofiber web materials were found to render smoothing effect by covering the trough between bound fibers and thus, hiding the true morphology of fibers on the paper surface. Apart from smoothing, which is one of the important paper properties requiring expensive furnishing, the thin nanofiber webs (tn-webs) also held the paper structure firmly by plunging of the nanofibers into the gaps between the micro-fibers. This is mainly due to their dimensional (10 nm < Diameter < 100 nm) compatibility. The smorgasbord shapes of the liberated tn-webs have a relatively lighter structures, found in the range of 2400-121500 μm2 areas, could be abundantly produced by adjustment of refiner blade type with a specific alkaline peroxide chemical level. The maximal level of paper smoothness was measured by the laser toner spread (fusion or otherwise). Analysis reveals more extensive toner fusion on Waldron-4 sample, suggesting surface uniformity anfd better leveling of fibers on paper surface. It turns out that, this corresponds to the fibers detected with more evidence of delamination and thus, more count of nanofiber web. Not only is this a proof of correlation of nanofiber web intensity with paper smoothness but also a possible promise for an alternative measure for paper printability enhancement.

Porous composite ceramics was manufactured from ordinary paper by sol-gel techniques, and SiC/Si ceramics composite with laminated or tubular structure were also prepared by biomimetic design. The results show that the amorphous carbon remained after carbonizing of the ceramic paper had changed into β-SiC after silicon infiltrating in the vacuum environment. The bending strength of SiC/Si ceramic composite was up to 200MPa, and it behaved as non-catastrophic fracture behavior.

A mulberry paper has been used to produce many consumer products such as lantern, card, packaging and decorating articles. Similar to other cellulosic materials, the mulberry paper bears abundant hydroxyl groups on its surface. Besides easily ignited, it can absorb water or humidity. To improve its thermal stability and to reduce deterioration caused by moisture adsorption, the mulberry paper was coated with a flame-retardant substance which was monoammonium phosphate (MAP) and a hydrophobic substance which was poly (methylhydrogen siloxane) (PMHS). The coating was conducted by immersing the mulberry paper in coating solution for 2 min followed by drying at 50 °C for 30 min. By varying a weight ratio of the PMHS and MAP, the PMHS:MAP weight ratio of 10:10 was found to be the optimum coating solution. The coated mulberry paper had good thermal property according to the thermogravimetric analysis. The uncoated mulberry paper showed residue of about 21% while the coated mulberry paper showed the increased residue of more than 50%. The burning test revealed that the coated mulberry paper was self-extinguished after removal of the ignition source while complete burning was observed on the uncoated paper. Moreover, it was water repellent with a water contact angle of 101.48 ± 5.81 degrees.

The meta-aramid fibrids were prepared by precipitation in this paper. The meta-aramid solution dissolved in the solvent system DMAc/LiCl was injected into the high shearing coagulant at room temperature and the mixture of water and N, N-dimethylacetamide(DMAc) was used as coagulant. The shearing rate, viscosity of the solution and the concentration of water in coagulant were the main factors on effecting the formation of fibrids. The meta-aramid fibrid has a gradual weight loss process when the temperature increases from 100°C to 400°C, lower thermal property of meta-aramid fibrid was due to the hydrogen bonding and crystalline structure were broken during dissolving process, however, a flexible and easy dispersing property of meta-aramid fibrid in fluid is due to its amorphous structure, which are very important that the meta-aramid fibrid has a better binding and adhesive property with the aramid short fiber in aramid paper, then yield a high mechanical and insulation property for aramid paper. Then, the properies of aramid paper were investigated. The results indicated that the proportion of meta-aramid fibrid in the aramid paper and the length of shorten aramid fiber are the main factors for affecting the strength and the other properties of aramid paper.

Response Surface Methodology (RSM) was used to study the relationship between the strength properties of poly ( p-phenylene terephthalamide)-PPTA paper and the preparation parameters, such as hot pressing temperature, hot pressing pressure, proportion of PPTA short-cut fiber and beating degree of PPTA-pulp. The results showed that: hot pressing temperature, hot pressing pressure have highly significant influences on the tensile strength and wet strength. The proportion of PPTA short-cut fiber has significant effects on the tensile strength and wet strength. The beating degree of PPTA-pulp also affected the tensile strength significantly. At the same time, the tensile strength was significantly influenced by the interaction between hot pressing temperature and the proportion of PPTA short-cut fiber as well as the interaction between hot pressing temperature and the beating degree of PPTA-pulp. The interaction between hot pressing temperature and hot pressing pressure has significant influences on wet strength, whereas the other factor interactions were not significant. The quadratic formula was established by optimizing the results of multiple regressions. And the model was highly consistent with the experiment. This model could be used to analyze and predict the main strength properties of PPTA paper and also might be used to optimize the production process of PPTA paper and control its quality.

Aluminium silicate fiber is an excellent high-temperature material which is widely used in special paper industry in recent years. Due to its property of hardly interweave into the paper and the low strength of the single inorganic fibers paper, it is difficult to make a general basis weight paper. In response to these issues, the strength of the paper was improved by adding some plant fibers. This study takes advantage of good resistance to high temperature of inorganic adhesive and bonding capacity of organic intensifier. Meanwhile two inorganic adhesives (waterglass and ludox) and one organic adhesives carboxymethy starch (CMS) were used in the process of preparing the aluminium silicate paper. The physical properties and insulation properties of the paper which prepared from the difference conditions were studied. The experiment results showed that the adhesive of waterglass and ludox can improve the properties of resistant to high temperature. The adding dosages were 10% and 7.5ml, respectively. The best ratio of alumina silicate fiber to conifier fiber is 7 to 3.The using of CMS can decrease the amount of the plant fiber and its best usage is 10%.

The effect of calendering temperature, speed and linear load on the properties of opacity, brightness, smoothness, paper thickness, gloss and ink absorption of art paper were studied by orthogonal experiment. The art paper coating formulations were as follows: GCC-60 100 pph, solid content 64.6% for precoating; GCC-95 40 pph, Kaolin 60 pph, and solid content 61.3% for top coating. Bar coater was involved to coat by hand in the lab and the coating weight was controlled at 20±2g/m2. After calendering in different conditions, the optical properties and printability of paper were analyzed. Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties. The results showed that linear load was the dominant one, followed by the calendering temperature and calendering speed. After calendering, smoothness and gloss increased, while the brightness and opacity decreased.

Bamboo paper sludge is a kind of industrial solid wastes and it is difficult to deal with it. In this study, the spectrum of bamboo paper sludge and the relationship between sludge with two different adhesives were investigated. Besides, the contents of C, H, O, N, S were measured by elemental analysis instrument of Vario Ⅲ. The results showed that: bamboo paper sludge FTIR spectrum was composed of five regions; kaolin and benzene derivatives were contained in sludge. UF was covered the surface of sludge forming a thick glue line and spectra was covered. But, the phenomenon did not appear in PF. The content of C, H, O, N, S in bamboo paper sludge was 35.68%, 6.4%, 18.48%, 3.27%, 1.21% respectively.

In order to predict and control the ink penetration depth, The base properties of 5 offset paper were firstly measured, namely, tightness、smoothness and K&N ink absorbency, etc. Then the penetration depth when offset magenta ink of the same volume entered into these papers was tested after printing. It was analyzed on the influences of offset paper and print processes on ink penetration depth. Finally, the relationships between the ink penetration depth under pressure and that under no pressure were studied. The results showed that both the tightness and smoothness of offset papers had impact on ink penetration into the paper internal structure, and the total ink penetration depth was about 1/5~1/3 of the thickness of the offset papers. In addition, the ink penetration depth under pressure was obviously lager than that under no pressure.

In order to know the application of bentonite in color ink-jet paper, an acid bentonite was prepared by modifying with sulphuric acid. Both of sodium bentonite and acid bentonite were characterized and evaluated with scanning electron microscope. The study result from printing quality testing showed that if the formulation of acid bentonite, under the dosage of 35% PVA and PDMDAAC 3% respectively, was used as the pigment, the print effect could be better.

The transfer paper used in novel silk transfer printing with reactive dyes was prepared by coating pastes. Water-soluble polyester named ES-1, carboxymethyl cellulose (CMC), alkali and hygroscopic agent were used according each function and mixed to prepare the pastes. The solid content of ES-1 and CMC in the pastes plays a crucial role in the face K/S value of prints. The color fastness of washing and rubbing for prints are above grade 4~5 and ES-1 is hardly adhered on printed fabrics.

Our presentation develops the study of cement mortars manufactured with melamine waste, either in the form of powder or cellulose paper, taken from the industrial production of particle boards, characterizing all of their properties and comparing them with traditional cement mortars. The objective is to determine in what way the addition of melamine powder and melamine paper will modify traditional mortar, once these materials have been subjected to a polymerization process under pressure and under increased temperature, in order to assess the possibility of using these new materials for applications in the construction industry. The behaviour of mortar in the fresh state is studied, determining the variations produced with the addition of melamine powder and melamine paper on the workability and the on-site use of these mortars. Likewise, their mechanical properties under flexion, compression, and adherence to a ceramic surface are studied and compared with those obtained from the reference mortar. Water absorption by capillary action and vapour permeability are also studied, in order to understand the interaction of the polymerized melamine in the capillary network of the mortar. Dosages were prepared for a reference mortar and a further two series of mortars with different quantities of melamine powder and melamine paper, together with cement, sand and water. In this first phase, the use of additives in the mixtures was not considered. The process of selecting the materials and the dosage criteria of the mixtures are subsequently described. The results of the study show that the use of powder melamine and paper cellulose melamine can be used to manufacture mortars with properties that are equivalent to traditional mortars, although further studies with greater precision will be needed on the contribution of the melamine polymerization process to the internal structural cohesion of the mortar.

Polyaniline-paper composite is prepared on a paper template by interfacial polymerization. Using SEM and FESEM, the morphology of PANI on fiber and pores between fibers are inspected based on different polymerization. The flake shape of PANI is formed on fiber surface at the beginning due to electrostatic attraction, while the granular is growing on the pores freely. This flake shape on fiber is changed with 3rd polymerization into granular. When the resistivity is below 100cm/S, linear PANI in pores is growing to the fiber nearby, and PANI network formed. The morphology also confirmed that PANI on fiber only remains on the upside not fully covered surface of fiber. Very few PANI is found inside paper substrate by cross section SEM. The method is discussed also with polyaniline-fiber composite polymerization and in-site paper polymerization.

Using Poplar P-RC APMP as raw materials for culture paper making, the effect of conventional papermaking process and P-RC APMP fines-calcium carbonate co-flocculation process on the P-RC APMP culture paper properties were studied. The result showed that, comparing to the conventional papermaking process, co-flocculation process can supply paper with better strength properties, bulk and whiteness. When precipitated calcium carbonate (PCC) or ground calcium carbonate (GCC) were added respectively in conventional papermaking process, the PCC supplied handsheets with better bulk and whiteness, while GCC supplied handsheets with better strength properties. In the co-flocculation process, the effects of PCC and GCC were nearly the same in strength properties and bulk of handsheets, but PCC was more beneficial for whiteness. SEM images showed that PCC distributed more evenly in the fiber network, and well-bonded with fiber network. The particle size of GCC is relatively small, mainly filled in the fiber network and wrapped on the fiber.

After the treatment of the ultrasound, the paper sizing agent preparation process with emulsion copolymerization of methyl methl acrylate and butylacrylate under microwave irradiation is discussed. To research the synthesis of sizing agent, the change of emulsion polymerization products of monomer conversion, particle size, and centrifugal stability were observed under types of conditions such as microwave power and dosage of emulsifiers. This synthetic method is due to use the microwave irradiation so that its response is very fast, and it can provide a new approach to prepare efficiently a paper sizing agent in the paper making.

The ink transfer rate and ink absorption rate directly affects the quality of printing matter, so it is very important to know the influence factors of the ink transfer rate and ink absorption rate. This paper studied on the impact of offset paper smoothness and offset paper absorbency on the ink transfer rate, the impact of offset paper compactness and offset paper absorbency on the ink absorption rate. The results show that ink transfer rate is affected by offset paper smoothness within a certain range. The ink transfer rate is affected greatly by offset paper absorbency. The ink absorption rate is greatly affected by offset paper compactness and absorbency.

Different fiber materials were modified and the effects of modified fiber on paper performance were evaluated. It’s shown that the strength of paper can be promoted by modified fiber. When the mixing ratio of modified NBKP fiber was 5%, the tensile index was increased from 38.28 N•m/g to 47.21 N•m/g. When the addition ratio of modified HYP fiber was 1.5%, the internal bond strength of paper was increased from 49.41 J/ m2 to 55.30 J/ m2, and the tensile index was increased by 48.06%. When the addition ratio of modified fiber of sawdust was 1.5% and mixed with OCC, the tensile index of paper was increased from 18.89N•m/g to 27.55N•m/g, and the ring crush index was increased by 13.99%.

Sepiolite has good adsorptivity due to their high surface area and structural channels. During the process of making aluminium silicate fiber paper, inorganic binders retaintion was little because of the smooth surface of aluminium silicate fibers. In this study, sepiolite was used to improve tensile strength of the sheet by increasing inorganic binders retaintion rate through its high adsorptivity. The effect of sepiolite on the tensile strength of alimunium silicate fiber paper was investigated. The results showed that the best mass ratio of aluminium silicate fibers to spiolite was 7:3. Under this condition, the tensile strength of the sheet was 4.79 N•m/g, which increased by 24.2% from the one without sepiolite.

In this paper, we proposed the method to synthesize the modified polyamide polyamine enhancer, which takes PAE, styrene and acrylic as raw materials. Factors that would affect the preparation of the modified polyamide polyamine enhancer, such as monomer amount, reaction time, initiator amount and emulsion concentration, were discussed in detail. Experimental results showed that the modified polyamide polyamine enhancer achieved optimum effect the strength of tube roll base paper under the conditions: the amount of acrylic is 6%, the ratio of styrene and PAE is 2:1, holding time 4h, and the amount of initiator 0.7%. The modified polyamide polyamine enhancer applied to tube roll base paper. The optimum amount of modified polyamide enhancer was 1%. The ring crush strength of paper prepared in this condition can be increased by 44% and the stiffness can be increased by 46%.

Paper plays an important role in determining image quality in inkjet printing. For high print quality, halftone dots should have minimal dot gain and sharp, circular edges, the receiving surface must have a line, high-porosity structure and be hydrophilic. Paper structure and surface chemistry requirements for good inkjet print quality are so unconventional that new paper grades for inkjet printing should be specially designed. This paper discuses the impact of coating adhesive on printability of inkjet paper.