Advanced Materials Research Vols. 332-334

Abstract: Dyeing cellulosic fibres with reactive dyes wastes great quantities of salt and water. The objective of this work is to dye cellulosic fibers using colored nanoparticles (CNPs) as an alternative to dyeing with reactive dyes, without salt and without washing off at the end of dyeing. Samples of cotton were dyed by exhaustion with CNPs at medium to dark colours. Build-up of colour compared to samples from previous work is given and shows a big improvement. Washfastness results are given. Washing-off after dyeing was not necessary for the red and yellow colours. The blue colour needs some washing off since the fastness is lower than for the other colours even though soaping is not necessary, saving energy and time relative to dyeing with reactive dyes.

Abstract: By extracting five kernel principal components of fabric FAST (Fabric Assurance by Simple Testing) low mechanical data, this paper proposed a supervised fuzzy clustering radial basis function neural network to construct fabric sewability prediction system. Our experimental results demonstrate that the proposed system could efficiently be used as an objective seam pucker evaluation system with high accuracy and is robust for various structures and mechanical properties of middle-thickness woolen fabric.

Abstract: In order to find the appropriate method to appraise the wear resistance of coated fabrics, Ti film was manufactured on the nylon fabric in different process conditions through magnetron sputtering, and then methods of breakage, mass loss, transmissivity and the changes of grey value were used to analyze the wear resistance of coated fabric. The results show that: the test data of sample breakage method can not be easily collected. The weight loss method has a very small difference before and after rubbing, and the static electricity attracts dust during the friction process that adds the error of experimental results. The Gaps between the fabric yarns result in large fluctuations in the method of transmissivity. The change of grey value method reflects well with the wear of coated fabric after rubbing and is suitable for evaluating the wear resistance of magnetron sputtering coated fabric.

Abstract: Fiber diameter is one of the most important identification indexes in distinguishing wool and cashmere. After analyzing shortcomings of existing measurement methods of the fiber diameter, an improved algorithm of measuring the diameter, in which the medial axis was extracted through the fiber morphology, was proposed. Experimental results show that this fiber diameter extraction algorithm achieves higher reliability and accuracy.

Abstract: The flammability is one of the most important features about safety for automotive interior material. This paper summarized the testing standards for flammability performed testing on a type of interior textile material made by one of domestic manufacturers, in accordance with the Chart 571.302 Standard No. 302 of the National Highway Traffic Safety Administration of U.S. The complete introduction of national mandatory standard of China in flammability of interior material was introduced and domestic test standards of flammability with those of foreign countries all over world were compared. Finally, this paper proposed possible and would-be necessary parameters based on comprehensiveness of this kind of test due to safer requirement in future.

Abstract: At present, the work to analyze fabric structure still depends on artificial visual measurement, which is easily influenced by personal sight, mood, mental state as well as light condition. With the development of image processing technology and artificial intelligence, automatic analysis on fabric structure as a replacement of manual labor is of great possibility. In this study, features of fabric-image have been extracted by GLCM (Gray Level Co-occurrence Matrix). These features were analyzed by employing a three layer BP neural network. Three kinds of fabric structures such as plain, twill and satin was verified and the accurate recognition rate is very high to 93.45%.

Abstract: An experimental method was developed in this work to study the PET fibers by synchrotron small-angle X-ray scattering (SAXS). Compared with the traditional measurement in air, the new method measured in the glycerin is helpful to eliminate edge scattering arising from the fiber edge. The results showed that intensity from edge scattering is so high as to cover the microstructure information. PET fiber with a diameter of 25 μm was measured by the new experimental method, and a lobed shape can be seen clearly on the meridian which didn't emerge in traditional measurement. The SAXS data were evaluated to extract parameters of lamellar structure and microvoids. In addition, the effect of fiber diameter on edge scattering was also investigated.

Abstract: The clothing pressure was mainly occurred on the shoulder, arm, back, underarm, elbow. It was tested by using the AMI clothing physiological comfort testing system. Arm moved from 0º to 140º positions in experiment when the clothing pressure was tested. The changes of clothing pressure of loosely fitted clothing are analyzed and discussed in this paper. The largest clothing pressure was occurred on the arm. The experiment results could explain the feelings of pressure properly.

Abstract: This paper presents the design and implementation of an image-capturing device with the function to focus on multiple images synchronously. This installation is a key subassembly of a close-range photogrammetric system (CRP) which is a camera-based device for the development of 3D profiling of cloth appearance and/or human body. This image capturing system consists of a set of USB cameras with geometric design, a supporting programme and a personal computer. In order to enable the synchronous image capturing function of 8 cameras within the limited space, a USB camera with 5 million effective pixels was developed. A programme for simultaneous image capture and a database of captured images have been developed using Visual Basic 6.0 and DirectShow.

Abstract: This paper pay attention to the piezoresistive effect of Carbon Nanotubes (CNT) on the 3D Braided Composite Material . CNT as a piezoresistive sensor, can be braided in the 3D Braided Composite Material. The resistance of the sensor will be changed with the correspondent stress and strain on the 3D Braided Composite Material. The resistance of the Carbon Nanotubes can be detected by computer. So, the stress and strain on the 3D Braided Composite Material can be obtained betimes.