Cheng Yan Zhu

Research on the Relationship between Color Thread Coverage Rate on the Surface of Yarn Dyed Fabric and its Color Saturation of Mixed Colors

In order to study the saturation control of space juxtaposition mixed colors of yarn dyed fabrics with different warp and weft colors, this paper takes the fabric variety with 6-color warp and 3-color weft for example, designed 7 kinds of weaves with gradual change of floating length with red, green and blue and makes them into fabric samples; then, puts forward the methods of posterization of digital fabric pictures and histogram statistics for counting the coverage rate of color thread on yarn dyed fabric surface, through which a more accurate result can be obtained than theoretical calculation; In the end, conducts color test on 21 fabric samples with Digieye digital color measurement system, which shows that the saturation (C*) of mixed colors of fabric samples has a good linear relationship with the coverage rate of color thread on yarn dyed fabric surface, with the linear correlation coefficient of 0.90333.

Research on the Porosity and Pore Size of Spun-Bonded Fabrics Based on Matlab7.0 Image Processing Technology

The image with high resolution was obtained through scanning the spun-bonded fabric, and processed with the help of Matlab7.0 software to calculate the pore structure of the spun-bonded fabric. On the basis of the relationship between number of pixels and area, the porosity and average pore size of spun-bonded fabric were analyzed; pore size and porosity were calculated by using the equation method and the air bubble test method as well. By comparing the data of the two methods, the correlation between them was gotten. Finally, it was shown that using the image processing technology to research the pore structure of spun-bonded fabric was a feasible way. There are various factors affecting the performance of textile filtering materials, and the porosity and pore size of the fabrics play an important role in filtration. As is known to all, fabric porosity and pore size are indicators to measure the size of fabric pore volume, one is the ratio of pore volume with the total fabric volume, and the other one refers to the average diameter of the holes in the textile filter material. They directly affect the permeability, the hydraulic conductivity of the fabric and the ability to prevent the particles getting through. Generally speaking, the bigger the porosity and pore size, the greater the permeability coefficient and the better the permeability of the filter material. Porosity and pore size directly affect the products function and application. Therefore, the pore structure has a great impact on textile filter performance [1]. Nowadays, the formula method was generally used to calculate the porosity, and the bubble method was always used in testing pore size.

The Wearability Research of New Environmentally Friendly Acrylic Fiber

The subject of interwoven fabric for trial used new environment acrylic fiber with different fiber materials. The warp thread of fabric has two groups, one group of 111.1dtex/36 polyester and the other group of 194.88dtex/ polyester/ rayon (80/20). Weft of raw materials can be categorized to seven kinds of blended yarn. A total of 24 experimental small sample trials were tested. 6 wear ability analyses of breathable, anti-wrinkle, anti-pilling, drape, stiffness and warmth of fabric were done. And reached some conclusions.

Design and Development of Cool Multifunctional Composite High-Grade Fabrics

In order to develop the multi-functional high-end apparel fabrics, the paper used materials, organization, patterns and colors to achieve a reasonable design to make cool fabrics, and when using Honeycomb UV fiber/ Tencel/ honeycomb jade fiber (50/30/20) blended yarn and machine warp density is 40 root/cm, weft density is 33 root/cm, fabrics havemost cool nature. This project combined with todays Fabric trends and used a sense of cool colors such as green and blue, has designed cool multifunctional composite high-end fabrics and showed the appearance of cool fabrics more comprehensively in the form of clothing simulation results.

Effects of Fiber Component on Tensile Properties of Composites

In the present work, authors have studied the effects of different fiber component on tensile properties of bi-component fiber reinforced composites. The plain preforms were woven. Basalt/polypropylene wrapped yarn and glass fiber/polypropylene wrapped yarns with different component were used as warp and wefts, respectively. The unified molding process was used to form fibre reinforced composites.The tensile properties of composites were tested and analyzed. Results show that the average fracture stress and elastic modulus of composites in weft direction tend to be the best when the volume ratio of glass fiber to polypropylene in the wrapped yarns is 55/45. The maximum fracture stress is 74.79 MPa. The maximum modulus of elasticity is 2.399 GPa.

Mechanical Property for the Combining Yarn of BF/GF and Polypropylene

In order to study the mechanical property for the combining yarn of BF/GF and polypropylene, 8 groups of combining yarn were designed and prepared. Through testing the mechanical property of the yarns, the affection of some parameters on the property of the yarns was analyzed. And following conclusions can be gotten. For BF/polypropylene combining yarn, when the fiber content of basalt is about 50.7%, the mechanical property of the yarn is the best. When the fiber content of basalt is about 43.7%, the mechanical property of the yarn is the worst. For GF/polypropylene combining yarn, the optimal and worst ratio is 55.42% and 44.4%, respectively.

Functional Studies on Coffee Yarn Knitted Clothing Fabrics

To study functionality of coffee yarn knitted clothing fabrics, use five different proportion of coffee yarn: 70% viscose/30% coffee yarn; 67.5% viscose/32.5% coffee yarn; 65% viscose/35% coffee yarn; 62.5% viscose/37.5% coffee yarn; 60% viscose/40% coffee yarn, knit five kinds of fabrics on computerized flat knitting machine.Test and analysis odor removal performance, hygroscopic, heat accumulation function of trial fabrics. The results show that: to coffee yarn and viscose blended knitted fabrics, along with coffee yarn content increases, the odor removal rate of the fabric has increased significantly, the fabric hygroscopic enhance, better performance of heat accumulation. 40% coffee yarn content of the fabric has a good heat accumulation.

Study on Light Fastness of Natural Yellow Silk Fabric

In this paper, the light fastness and glossiness of natural yellow silk fabric were analyzed. The test items included the mechanical property, light color fastness, perspiration color fastness, and rubbing color fastness. The relation between the glossiness and different specification of the silk fabric was discussed. Finally, the glossiness of fabric with different degumming rate was observed. The experimental results reveal that the fracture strength of fabric reduces significantly. The fabrics light fastness runs up to 1~2 degree, perspiration color fastness can reach 5 degree as well as rubbing color fastness. For the 8/5 satin fabric, the glossiness is low. Glossiness of the plain weave is less than the one of the twill fabric. After 48h lighting, the glossiness decreases while the reflectivity increases. When the lighting time increases from 48h to 96h, the glossiness increases gradually. After degumming finishing, glossiness of the fabric decreases, while the reflectivity increases. The fabric can achieve a relatively fine glossiness at degumming rate of 17.34%.

Influence of Structure Parameters on Moisture Permeability of Fabric Woven by Fine PP Fiber with Star Section

To study the influence of structure parameters on moisture permeability of fabric woven by fine pp fiber with star section, nine fabrics with different structure and tightness had been woven for experiment, and a moisture permeability test with moisture absorbtion method was performed and compared for these fabrics. Some conclusions are obtained: the moisture permeability showed direct correlation with fabric texture and tightness. It will be improved as the the float of weave get longer. Moreover it will decline with the increasing of fabric tightness and showed significant correlation with Polynomial function when the results fitted with it.

Comparison of Color Measuring Methods for Yarn Dyed Woven Fabrics

The color appearance mode of yarn dyed woven fabric is different from that of color addition mixture and color subtraction mixture. In order to test and verify the differences of different color measuring methods applied to yarn dyed woven fabrics, 16 samples of yarn dyed woven fabrics made of the threads of different colors in different permutation and combination were tested by human eye evaluation, spectrophotometer and digital image processing system in this paper. The results showed that both the spectrophotometer and digital image processing methods were not accurately approximated to the results of human eye evaluation. Relatively, the results of digital image processing method were closer to that of the human eye evaluation. The work of this paper may contribute to promoting the color measurement in yarn dyed fabrics.