Weigang Cui

Embeddable and locatable spinning

A novel spinning method: embeddable and locatable spinning, is reported for the first time in this paper. Analysis of the key restrictions of the conventional and some novel ring-spinning were studied; evolvement and principles of embeddable and locatable spinning were then introduced. Analysis indicated that embeddable and locatable spinning could overcome the existing restrictions of ring spinning and improve the spinning performance of fiber strands as well as the quality of the resulting yarn. Super-fine and colorful figured yarns could be produced successfully, and most fibers shorter than can be spun in traditional spinning could be well embedded into a yarn by embeddable and locatable spinning method; even staple fibers of low qualities could be used to produce a fine yarn of high qualities in the novel spinning system. This novel spinning method shows huge application potentials in textile industry by improving the yarn quality, developing super-fine yarn, and increasing fiber utilization rate.A novel spinning method: embeddable and locatable spinning, is reported for the first time in this paper. Analysis of the key restrictions of the conventional and some novel ring-spinning were studied; evolvement and principles of embeddable and locatable spinning were then introduced. Analysis indicated that embeddable and locatable spinning could overcome the existing restrictions of ring spinning and improve the spinning performance of fiber strands as well as the quality of the resulting yarn. Super-fine and colorful figured yarns could be produced successfully, and most fibers shorter than can be spun in traditional spinning could be well embedded into a yarn by embeddable and locatable spinning method; even staple fibers of low qualities could be used to produce a fine yarn of high qualities in the novel spinning system. This novel spinning method shows huge application potentials in textile industry by improving the yarn quality, developing super-fine yarn, and increasing fiber utilization rate.

Dynamic analysis on the thermal and electrical properties of fabrics in the process of moisture absorption and liberation

Purpose – The purpose of this paper is to present a dynamic analysis on the thermal and electrical properties of fabrics under wet conditions.Design/methodology/approach – A purpose‐built apparatus is applied to test the thermal and electrical properties of textiles in moisture absorption and liberation process. Relation between temperature and resistance of a cotton/polyester double‐layer fabric is also analysed.Findings – The surface temperature of textiles shows three different stages in the process. The electrical resistance is linearly related to the reciprocal of the moisture regain of fabrics. In the moisture absorption and liberation process, surface temperature of cotton layer is higher than that of polyester layer. And the electrical resistance of cotton layer decreases more quickly than that of polyester layer. The electrical resistance changes earlier than surface temperature in the moisture‐liberation process.Practical implications – The paper is helpful in not only the designing of sportswea...

Snippet Counting for Cotton Length Distribution Measurement Using Image Analysis

This paper presents a new method of measuring the number-length distribution of cotton fibers using a snippet-counting method and image analysis techniques. The test samples were aligned at the baseline and combed to form a tuft web, or beard, which was cut into a number of segments of a specific length by a fiber cutter. The snippets in different cut segments were collected and distributed on separate black glossy papers, and then they were digitized and scanned in order into a computer for image analysis. The scanning order indicated the distance of each segment from the cutting baseline, and the number of the snippets on a glossy paper was the frequency of fibers present in the current segment. A specially designed image analysis program was used to trace all snippets in a scanned image, so that the number of snippets could be calculated. After all of the images were analyzed, the fiber numbers in different segments could be summarized, and from these number-length data the distribution, maximum length...This paper presents a new method of measuring the number-length distribution of cotton fibers using a snippet-counting method and image analysis techniques. The test samples were aligned at the baseline and combed to form a tuft web, or beard, which was cut into a number of segments of a specific length by a fiber cutter. The snippets in different cut segments were collected and distributed on separate black glossy papers, and then they were digitized and scanned in order into a computer for image analysis. The scanning order indicated the distance of each segment from the cutting baseline, and the number of the snippets on a glossy paper was the frequency of fibers present in the current segment. A specially designed image analysis program was used to trace all snippets in a scanned image, so that the number of snippets could be calculated. After all of the images were analyzed, the fiber numbers in different segments could be summarized, and from these number-length data the distribution, maximum length, mean length, and other fiber statistics could be derived.

Dyeing Properties of Silk Super Fine Powder

In this paper, silk powder around 1.5 micrometer average in size was developed and its dyeing property was compared with normal silk fiber. The results show that silk powder has a very high dye uptake property and can be dyed at room temperature; it can also be used to improve the dyeing property of some materials when it acts as a kind of additive agent. The K/S value of silk fiber is higher than that of silk powder. Their K/S value of silk fiber and silk superfine powder are influenced largely by the dye concentration. The WXRD diffraction curves showed that the crystallinity of silk powder is lower than that of silk fiber. FTIR spectra of silk powder showed that the intensity peak of CH2-antisymmetrical stretching vibration largely decreased, and the peak of C=O symmetrical stretching vibration of amid bond moved to the high wave-number. TG patterns of samples showed that water (moisture) could be easily removed from the powder when the temperature was over 70°C, and the initial decomposition temperatu...

Bleaching and Dyeing of Superfine Wool Powder / Polypropylene Blend Film

Fibers based regenerated protein draw much attention for recycling discarded protein resources and can produce biodegradable and environmental friendly polymers. In this study, superfine wool powder is blended with polypropylene (PP) to produce wool powder/PP blend film through extrusion and hot-pressing. Hydrogen peroxide is used to bleach the black colored surface of the blend films. The effects of peroxide concentration, bleaching time and powder content on the final whiteness and mechanical properties of the blend films are investigated. The bleached films are dyed with acid red dyes and the dyed color is evaluated using a Computer Color Matching System. Color characters of dyed films, such as L * , a * , b*, ∆E * ab, C*ab and K/S values are measured and analyzed. The study not only reuses discarded wool resources into organic powder, widens the application of superfine wool powder on polymers, but also improves the dyeing properties of PP through the addition of protein content.