Advanced Materials Research Vols. 332-334

Abstract: Since the present researches on pollution control for textile printing & dyeing industry are mainly focused on qualitative description up to now, instead of special quantitative analysis, based on the census data of pollution sources, this paper adopts literature collection method and single-factor variance components method for continuous variables to identify the factors influencing cost for pollution control, and then establishes a function of investment and operation cost for textile printing & dyeing industry by MLE (maximum likelihood estimation) method on the basis of normal distributional hypothesis, so as to calculate pollution control cost for the textile industry and provide a quantitative basis for pollution control of the textile printing & dyeing industry. The research result shows that nature of enterprise, pollution-control method, regional distribution and industry type are all important factors which influence cost control of textile industry, there are significant variations of pollution control cost for textile industry between among different regions, treatment processes, or industry types.

Abstract: 3D spacer fabrics have obviously better performance compared with ordinary fabrics due to their special "sandwich" structures. The paper is to investigate the structures and their compression performances, tensile properties and bending performances on 20 kinds of 3D spacer fabrics. The experimental results showed the relationship between mechanical properties and structures of spacer fabric, and obtained the correlation between each mechanics index and fabric, stiffness. It is useful in expressing the special behaviors of spacer fabrics.

Abstract: Mechanical indexes, including tension, shearing, bending, compression, and surface friction characteristics, for the two super-fine-sheep wool gabardine fabrics which are treated by calendering finish or not in a low stress were obtained by using Kawabata’s Evaluation System (KES-FB-AUTO-A). Results showed that different fabrics have their own style characteristics. Calendering finish can endow a thin wool gabardine fabric high count fabric with a better style characteristic. However, it will also affect the sewability of fabric when it is made to be a garment.

Abstract: In this study, carbon fiber/ polypropylene (PP) complex braiding yarn, with its different breaking strength, was prepared. It was designed by braiding polypropylene (PP) wrapped yarn and carbon fiber core yarn using eight and sixteen spindles braiding machines, with change of take-up gear number. Environmental factors, such as pH, temperature and time, were also changed to produce geo-grids with high strength, high modulus and better weather resistance. In order to make stable structure for complex braiding yarn, the heat treatment was also considered. Finally, geo-grids braiding by optimal treatment parameters were cut into single rib and junction specimens for tensile test.

Abstract: A 3D finite element model of three-point flexure test of carbon fiber/epoxy composite laminates is developed and analyzed with the finite element software ANSYS. Based on the Hashin criterion, a stiffness degradation method is adopted to predict the progressive failure properties of the carbon fiber/epoxy composite laminates. For carbon fiber/epoxy composite, five failure modes: fiber tensile failure, fiber compressive failure, matrix tensile cracking, matrix compressive cracking and fiber-matrix shear-out failure are included in the present model. The calculated load-displacement curve and the final flexural failure strength are compared with the experimental result, and the finite element results are in good agreement with the experimental values.

Abstract: In this paper, three oxidation processes were employed in kenaf degumming. The properties of degummed fibers such as fineness, residual lignin content were tested, and the degumming effects were analyzed by XRD and IR spectroscopy. The crystallinity of kenaf fiber increased after being treated. The addition of the strong oxidizing agents including potassium peroxymonosulfate and peracetic acid (plan CT2) in the later process of caustic soda and hydrogen peroxide scouring (plan CT1), as well as the usage of the sulfate method after above treatments (plan CT3), resulted in the gradual increase of relative integral area value Ai/As calculated by the characteristic peaks of the cellulose in IR spectra and the gradual decrease in the sum of those of lignin and hemicellulose. At the same time, the content of lignin gradually decreased, while the fineness gradually increased. The results indicated that the three oxidation treatments adopted in degumming had obvious effects. As a new oxidant, the mixed liquid of potassium peroxymonosulfate and peracetic acid was effective on delignification.

Abstract: Based on the analysis of the PLA/Tencel knitted fabric structure parameters, this paper, with the double screening stepwise regression analysis method, analyzes the influential PLA/ Tencel knitting fabric moisture absorption of quick dry, eliminates the insignificant factors and keep the distinctive factors. In terms of the quick dry effect of moisture absorption in different time, this thesis set up four optimal regression models. The analysis shows that the knitted fabric properties of moisture absorption and quick dry can be forecasted with the regression models, which use the correlation index of fabric specification structure parameter as input parameter: the wet transmission of PLA/tencel knitted fabric was corelated with the PLA content, weft density, warp density, yarn diameter, but the relationship with the fabric thickness is not obvious. The drying rate of 30 min and 60 min are related with the tencel content and weft density, the 30 min drying rate is bound up with the thickness of the fabric and the 60 min drying rate was related with square meters grams and linear modulus of stitch. Meanwhile, the correlation coefficient of predicting model after the adjustment is high and the maximum fitting error of predicted values and measured values of the maximum fitting error is small.

Abstract: To study the influence of negative oxygen ions fiber content on the released negative oxygen ions concentration of the fabric and the effect of different organizational structures on wearability of negative oxygen ions fabrics, the blended yarns of modified polyester negative oxygen ions fiber and viscose fiber in different blending ratio were selected, two series of fabrics were manufactured for the experiment. The released amount of negative oxygen ions and wearability of the blended fabrics were tested and analyzed in this paper. The results showed that with the increasing of negative oxygen ions fiber content in fabrics, the released negative oxygen ions concentration had increased. When the blended ratio of negative oxygen ions fiber and viscose fiber in fabric was 50/50, the released negative oxygen ions concentration of the fabric reached up to 4810/cm3 and was close to that of the field. Wearability of honeycomb weave fabric was best and suitable for home textiles through comprehensive analysis, followed by satin fabric. The conclusion from this research can be used as a reference to design and develop negative oxygen ions home textiles.

Abstract: Different percentage of cashmere/yakwool was blended and spun into single yarn, then woven into fabric. 16 indicators were measured by KES and the basic style value of stiffness, smoothness and fullness of fabrics were calculated with the analysis software. The results showed that the stiffness reached the highest value of 3.76 at the cashmere /yakwool blending ratio of 8/92, the smoothness reached the highest value of 18.13 at the cashmere /yakwool blending ratio of 25/75 and the fullness reached the highest value of 8.03 at the cashmere /yakwool blending ratio of 50/50. From all the basic style value of stiffness, smoothness and fullness, it showed that the cashmere /yakwool ratio of 50/50 was the best one.

Abstract: This paper begin with the structural characterization of down and feather of the duck and goose.The surface morphological structure and the composition group structure of down and feather fibers were investigated by using FESEM, FTIR. The results showed there are many differences in the down and feather fibers such as the morphological structure of nodes, the content of -SH group. The study conclusion provide a useful reference for the further research and quality inspection.