Table of Content

15 July 2016, Volume 37 Issue 07

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Effect of temperature conditions on antioxidant activity of pigment of naturally green-colored cotton fiber

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  1-6. 

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Abstract Based on polyphenols pigment of natural green cotton and its structural instability, the scavenging 1- diphenyl - 2 –picrylhydtazyl (DPPH) radical method was used to study the effects of temperature, light irradiation, acid-base condition on the antioxidant activity of green cotton pigment. The results showed that high alkali conditions had great influence on the antioxidant stability of natural green cotton. The DPPH radical scavenging activity of green cotton pigment fell to 2.97% ,when the pigment was treated in the alkali solution with the pH value of 13.When adjusted to neutral, green cotton pigment recovered to 81.38% of its original radical scavenging ability, indicating that most of radical scavenging ability lost resulted from the alkaline condition was recoverable. The ultraviolet spectra measurements demonstrated that the main structure of pigment was unchanged when in the alkaline condition, but the structure of some components of the pigment had changed irreversibly .Light irradiation had significant effect on antioxidant activity of the pigment of naturally green cotton. The radical scavenging ability of green cotton pigment dropped to 57.10% when the pigment was exposed to the sun light for 5 days. It was found that on significant change in radical scavenging ability of green cotton pigment was caused, when treating the pigment at 150 ℃ for 1 h.

Structure and performance of corn bracts and its fiber

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  7-12. 

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The corn bracts and their fiber were tested in structure and properties with digital fabric thickness meter, electronic fabrics strength tester, Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray crystal diffraction (XRD) in order to develop their application. Experimental results show that the thickness, horizontal and longitudinal strength of corn bracts all reduce gradually from outer layer to inner layer. Corn bract is mainly composed of cellulose, hemicellulose and lignin, and after chemical treatment the content of cellulose increases to 43.79% and that of hemicellulose and lignin decrease. The microscope images show that the surface of corn bract is rough and randomly distributed with holes. The single fiber in corn bract has irregular cross-section and high hollowness. In addition, its longitudinal surface is smooth. X-ray diffraction analysis show corn bract and its fiber both have the crystal structure of celluloseⅠ, with crystallinity of 38.9% and 57.85%, respectively.

Effect of cotton mechanical picking on fiber qualities in Xinjiang

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  13-17. 

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The multi-site plots were chosen on the Farms of Xinjiang, to compare the difference of fiber qualities between machine picking and hand picking, explicit the effect of cotton picker on cotton fiber qualities, to explore the strategy for improving cotton fiber. The results showed that there was a significant difference of machine picking on fiber quality. Fiber length and micronaire had no significant changes between machine picking and hand picking, and little changes in multi-site plots and varieties. Compared hand picked cotton, fiber strength, uniformity index and spinning consistency index decreased significantly. Especially, changes of fiber strength and spinning consistency index were lager, at less than 11.3 % and 25.8 % separately, and 62.5 % of varieties decreased significantly. Change of short fiber index was most significance among six fiber quality indicators, short fiber index of cotton picker increased 51 % than it of hand picking cotton, at more than 90 % and 130 % separately in multi-site plots and varieties. Therefore, to explore the changes of fiber quality on cotton picker, choosing suitable varieties and reasonable layout were main means for improving fiber quality.

Factors influencing current relaxation of cotton fiber assembly

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  18-21. 

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in this paper, by means of self-made fiber compression device and current testing system based on LabVIEW, effect of volume density, voltage, relative humidity and temperature on random cotton fiber assembly current relaxation was experimentally investigated. It was found that: with volume density increasing, time of random cotton fiber assembly current from peak to stable value reduces to some extent; with the increase of voltage, time of current from peak to stable value decreases; with relative humidity and temperature raising, the time of current from peak to stable value shortens. In order to obtain the accurate fiber conductance, the testing time is considerably selected by cotton assembly status, testing voltage, relative humidity and temperature.

Moisture absorption of wild Calotropis gigantea fiber in Yunnan

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  22-27. 

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To investigate the moisture absorption property of the seed fibers of the wild Calotropis gigantea (C.gigantea) growing in Yunnan, China, the moisture regain of C.gigantea in standard atmosphere and water absorptive capacity were measured and compared with cotton fiber. The moisture adsorption/desorption curves and the moisture adsorption/desorption rate curves were analyzed. Experiment results articulate that C.gigantea fiber exhibits superior hygroscopicity compared to that of cotton; and under standard atmospheric conditions, the equilibrium moisture regain of C.gigantea is 11.4 %. The hysteresis between the sorption and desorption isotherms of C.gigantea fiber is higher than that of cotton across all relative humidity range. The C.gigantea fiber’s moisture adsorption-desorption behavior can also be described using an exponential model. Its moisture desorption rate and the difference of the moisture absorption and desorption equilibrium time are significantly larger than that of cotton fiber. The hygroscopic capacity and moisture absorption/desorption rate of C.gigantea fibers are higher compared with cotton fibers. Thus, C.gigantea fabric is more wearing comfort than cotton fabric. Both C.gigantea fiber and cotton fiber exhibit poor infiltration property, but the adsorption capacity of C.gigantea fiber, being 133.62 %, is significantly higher compared with cotton (74.98 %). It concludes that fibers extracted from C.gigantea pod can be an ideal source of absorbent materials.

Effect of ultrasonic time on property and structure of polyvinylidene fluoride/SiO2 flat membrane

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  28-33. 

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SiO2 nanoparticles and non-ionic surfactant tween 80 were filled into PVDF so that PVDF ultrafiltration membranes were prepared through the phase inversion method, SiO2 emulsion was dispersed by ultrasonic and nanoparticles were uniformly dispersed through ultrasonic cavitation. The effect of different ultrasonic time on the degree of crystallinity was measured by differential scanning calorimetry (DSC) and X-ray diffraction (XRD), using total reflection Fourier transform infrared spectroscopy (ATR-FTIR) studied the crystal structure of the membranes. Surface and cross-section morphology of the membranes were observed through scanning electron microscope (SEM). The results showed that different ultrasonic time did not change the crystalline state of the membranes and the microstructure was different with the ultrasonic time. At last, hydrophilic, mechanical strength and permeability of membranes were also characterized. The experimental datas showed that the hydrophilic and mechanical properties with the increasing of ultrasonic time appeared the best values, but after that, the properties were becoming weaken. The result of pure water flux was the same as above, but the ultrasonic time had no significant effect on the retention of bovine serum albumin.

Thermal degradation properties of polyethylene terephthalate and polybutylene terephthalate

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  34-38. 

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Non-isothermal degradation properties of polyethylene terephthalate and polybutylene terephthalate were studied and compared by multiple linear regressions (MLR). Kinetic parameters, such as activation energy Ea, pre-exponential factor Z and reaction order n, were calculated by kinetic analysis software. And on this basis, relations between the extent of conversion, temperature and time of polyethylene terephthalate and polybutylene terephthalate were predicted. The results show that polyethylene terephthalate exhibits good thermal stability, which initial degradation temperature is higher than polybutylene terephthalate at the same heating rate. However, its rate in thermal decomposition is faster. All of those are related with the chain structure and the oligomers produced in thermal degradation.

Heat-moisture performance of cool polyamide filament

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  39-43. 

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In order to analyze the heat-moisture performance of cool polyamide filament, the basic performance such as fiber fineness unevenness, tensile performance, friction performance, shrinkage rate in boiling water and oil content were tested and analyzed first. Based on this, the thermal performance, cooling performance, moisture absorption and liberation performance of cool polyamide filament were studied respectively by differential scanning calorimeter, thermal gravimeter analysis, cooling test, moisture absorption and liberation test on the basis of basic performance test and analysis. The results show that the fineness unevenness, tensile performance and friction performance of cool polyamide filament is relatively poor compared with ordinary polyamide filament, but the shrinkage rate in boiling water and oil content are close to ordinary polyamide filament. Differential scanning calorimetry curve of cool polyamide filament has some difference with ordinary polyamide filament. During the process of weaving, dyeing and finishing, the control temperature of cool polyamide filament should be lower than 370 ℃. The cooling performance, moisture absorption and liberation performance of cool polyamide filament are better than ordinary polyamide filament.

Digital spinning method devoloped from ring spinning

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  44-48. 

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In order to extend the product variety of ring spinning system, the mechanical structure of back rollers on ring spinning system was creatively redesigned. This new design increases the feeding nip of back rollers in one spinning unit from single to multiple, and each back roller is driven by a servo motor. The feeding speed of each nip can be respectively adjusted to realize the asynchronous feeding of several rovings. The linear density or blending ratio of the yarn spun by this system is varying along the lengthwise direction, and this spinning method is defined as Digital Spinning. Based on the Digital Spinning of three rovings, for the colored spun yarn, the digital spun yarns could be classify as melange yarn, gradient color yarn, section color yarn, slub yarn, slub color yarn and bivariate yarn, and the characteristics of these yarns were also analyzed. The advantages in flexible processing and product diversification of this spinning method are well shown.

Optimum oxidation bleaching condition and spinnability of black yak wool

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  49-54. 

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In order to investigate the influence of the oxidation bleaching condition on black yak fiber properties and spinnabilities. Firstly, the oxidation bleaching condition of black yak fibers was optimized by orthogonal experiment, and the optimum oxidation bleaching condition were presented, hydrogen peroxide concentration 25 g/L, sodium pyrophosphate concentration 5 g/L, temperature 75 ℃, time 90 min and PH value of the solution 8.5. Secondly, by comparing the bleached fiber properties with unbleached fibers, 20.83 tex yak fiber yarns was spun on the condensed compact spinning system and the four rollers lattice apron compact spinning system, and the spinnabilities of bleached yak fibers were studied further. The results show that after bleaching, the physical and mechanical properties of yak fibers decreased and the scales of bleached yak fibers were damaged. When the same count yarns were spun on the same spinning system, the evenness, strength and elongation performances of bleach yak fiber yarns were poorer than unbleached. When the same count yarns were spun on different spinning systems, the evenness of bleached yak fiber yarns spun on the condensed compact spinning system were better that spun on the four rollers lattice apron compact spinning system, but the strength and elongation performances were poorer.

Effect of warp knitting on mechanical properties of spun yarn

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  55-60. 

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Simulation design of digital jacquard fabric based on separated color gamut of Red-Green-Blue

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  61-65. 

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For the Red-Green-Blue(RGB)color separation mode can't be used as a method to get color information for the design of the digital jacquard fabric directly, this paper studied the weft color selection range to match the color of three channels separately, according to the analysis of color field of the single color channel. The experiment of jacquard fabric design was carried out by utilizing triple-weft combination weave structure with full-color effect, then the solution to optimize the color effect of the jacquard fabric was studied. The results prove that, according to the rule of R,G,B corresponding to blue, red and yellow weft color, the monochrome image can be applied directly for the design of digital jacquard fabric. To increase the bright parameter of the three gray picture respective reasonably, which can meet the demand of three color simulation design for digital jacquard fabric. The experiment results provide the references for taking advantage of the design value of the RGB color channel separation mode.

Knitting processes and properties of three-dimensional comprter flat-dnitted spacer fabrics

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  66-70. 

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In order to make curved composites, this paper designed a innovative curved three-dimensional(3-D) spacer structure. First introduces a knitting technique of computer flat-knitted innovative 3-D spacer fabrics with double rib connection by using aramid fibers, then the aramid reinforcement yarns are integrated into two surface layers of 3-D spacer fabrics in the weft direction to enhance the tensile properties. By changing the weaving process, flat-knitted 3-D speacer fabrics curved in different angles(in the warp direction)were developed. Tensile tests on the universal material testing machine are carried out in the weft and warp directions of the two spacer fabrics(with reinforcement yarns and without), and their stress-strain curves are compared. The results revealed that reinforcement yarns reduced deformation, and improved tensile stress and dimensional stability of 3-D spacer fabrics when other experimental conditions being equal.

Numerical simulation of tensile properties of polytetrafluoroethylene/Kevlar broken twill fabric liner

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  71-76. 

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The properties of the fabric liner for self-lubricating spherical plain bearings include tension property, compression property and wear property, and numerical simulations and experiment verification of the tensile properties were investigated in present article. First of all, the section testing was done, and Laser Scanning Confocal Microscope (LSCM) was used to observe the section morphology of fibers. By measuring and calculating for the profile, the geometry parameters of the fibers were obtained. The reinforcement unit-cell model of the fabric liner was built using ANSYS finite element software. Then, based on the mesomechanics of composite materials and the periodic boundary conditions, the tensile properties of the fabric liner were studied and the tensile elastic constants of the hybrid Polytetrafluoroethylene (PTFE)/Kevlar broken twill fabric liner were obtained using ANSYS. At last, comparison of the experimental results and the simulated ones shows that the error is about 20%, which is within the allowed range.

Preparation and sound absorption properties of waste wool nonwoven material

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  77-81. 

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In order to study the sound absorption properties of discarded wool fiber, a novel wool nonwoven material was prepared by a traditional non-woven technique with discarded wool fibers as the main raw material. Using the transfer-function method and standing wave tube method, the sound absorption properties of wool nonwoven materials in a frequency range of 250–6300 Hz were studied by changing the thickness, density, and cavity depth. Results indicated that wool nonwoven materials exhibit excellent sound absorption properties, which at high frequencies are better than that at low frequencies; at the sound waves of low frequencies, as thickness, density and cavity depth increase, sound absorption properties improve. The thickness and cavity depth are the main factors affecting the sound absorption properties of the material, moreover, it is an economic and reasonable way to increase the sound absorption properties of the material by enhancing the cavity depth.

Preparation of n-eicosane/ sodium alginates phase change microcapsules by hole-coagulation bath

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  82-87. 

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Microcapsules containing n-eicosane with sodium alginates as shell were prepared by hole-coagulation bath. Surface morphology and thermal properties of N-eicosane/ sodium alginates phase change microcapsules were characterized using optical microscope (OM), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). The results indicate that the optimum preparation conditions of n-eicosane/ sodium alginates microcapsules as follow: the mass fraction of sodium alginate is 2.5 %, the mass fraction of CaCl2 is 7.0 % and the mass ratio of core and shell materials is 1:3. Under the optimal conditions, spherical microcapsules have smooth surfaces. The average diameter of microcapsule is 56.7 μm and the latent heat of phase change is 117.3 J/g. The microcapsules have excellent thermal properties, and thermoregulation performance of the fabric is remarkable improved.

Synthesis of peroxide activator for low-temperature bleaching of cotton fabric

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  88-92. 

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To overcome the drawbacks of conventional peroxide bleaching of cotton fabric such as high energy consumption and extensive fiber damage, N-[4-(triethylammoniomethyl)benzoyl]caprolactam chloride (TBCC) was synthesized for use as a peroxide bleach activator in this paper by one-pot method, which allowed cotton fabric to be bleached under near-neutral pH conditions at low temperatures. TBCC synthesized by the one-pot method was confirmed with proton nuclear magnetic resonance spectroscopy (1H NMR). Experimental results showed that, compared to the conventional synthesis method, the one-pot synthesis method could increase the final yield of TBCC by 35.2%. TBCC prepared by the one-pot synthesis method had the same bleaching effect as the the one synthesized by the conventional synthesis methods. Compared to the conventioal peroxide bleaching, the TBCC-activated peroxide system could provide cotton fabric withh equivalent degree of whiteness and slightly inferior water absorbency, but caused no apparent damage to cotton fibers. The one-pot synthesis of TBCC had advantages such as simplified operation, shortened process, reduced energy consumption, increased product yield, and as such lowered cost.

Properties and application of wet rubbing fastness improver assisted by copper particles

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  93-98. 

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In order to improve the wet rubbing fastness of fabrics in dark shade, the wet rubbing fastness improver assisted by copper particles was synthesized with butyl acrylate, methyl methacrylate and sodium dodecyl benzene sulfonate. Morphology and dispersion distribution of the wet rubbing fastness improver assisted by copper particles was analyzed by scanning electron microscope and particle size analyzer. It was found that the modified copper particles were assembled like a pomegranate in water. Mean particle diameter of the wet rubbing fastness improver assisted by copper particles is around 2472nm. Thus, application of the wet rubbing fastness improver on cotton fabrics dyed with reactive dyes was investigated. It was found that the wet rubbing fastness of cotton fabrics dyed with reactive dyes had increased 1～1.5 grades after the treatment of wet rubbing fastness improver, when reactive dyes concentration was at 6% and 8%(o.w.f) respectively.

Hydrophobic modification of cotton fabric by helium low temperature plasma inducing graft polymerization

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  99-103. 

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Helium plasma inducing graft polymerization of 1, 3, 5, 7-Tetravinyl-1, 3, 5, 7-tetramethylcyclotetrasiloxane (D4Vi) was investigated on cotton fabrics to prepare hydrophobic materials. The effects of plasma treatment parameters, such as RF power, treatment pressure and time on the graft ratio were investigated. Moreover, morphological, structural and hydrophobic properties of cotton before and after plasma treatment were characterized using field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and water contact angle analysis respectively. The results showed that the treated cotton fibers were coated by uniform, dense films which perform and cotton fabric presents an excellent hydrophobicity with a water contact angle of 150° under a load pressure of 20Pa, RF power of 80W and time of 2min. Infrared and XPS spectra indicated that after initiation by the He plasma, the surface of cotton fabrics introduced new Si-O bonds and Si element.

Influence of nano-ZnO to finishing on anti-UV properties of silk fabrics

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  104-108. 

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Nano-ZnO was modified by titanate coupling agent and then used as UV resistance finishes for improving the UV resistance property of silk fabrics. Then using Lambda 900 UV spectrophotometer to measure the UV transmissions in the wavelength range from 280 nm to 400 nm，The UV transmittance and UPF values of the finished fabrics were used to evaluate UV resistance. Moreover orthogonal experiments were designed to determine the optimum process. The results showed that the optimum finishing conditions were: nano-ZnO concentration has remarkable effect on the UPF value, followed by coupling agent concentration and ultrasonic treatment time; .nano-ZnO concentration 18 g/L, coupling agent concentration 12 g/L, and ultrasonic treatment time 20 min; The average UV transmittance reduced from 27.09 % to 2.46 %, the UPF value increased from 2.624 to 35.428; the treated silk fabric had good laundering durability.

Influence of benzotriazole UV absorber on photostability of silk

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  109-114. 

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To enhance the photostability, silk fabric was treated with the benzotriazole structure ultraviolet absorber UV-FAST W (UVFW for short). The photoyellowing course of silk was measured and analyzed during the ultraviolet irradiation. Effects of concentration of UVFW on photoyellowing and on phototendering of silk fabric were analyzed. Then, the wet fastness of silk treated with UVFW was discussed. At last, the UVFW was used to the dyed silk with acid dye and its impact on the color index and light fastness was discussed. The results show that the photostability of silk treated with 1% (owf) UVFW was improved obviously, but the photostability was no longer improved obviously when the UVFW concentration continued to increase, and the whiteness of treated silk will be reduced with the increasing of UVFW concentration. The wet fastness of silk treated with UVFW need to be improved further, because the photostability of silk treated with UVFW was reduced significantly after washing same times. The color index and light fastness of dyed silk will be affected by UVFW, but effects were different and related to dye structure.

Relation between fabric force at specified elongation and fitness of elastic clothing

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  115-0120. 

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In order to study calculating fitness of elastic knitted clothing, 20 types of elastic knitted fabrics were selected. First the force at 10%,20%,30%,40%,50% and 60% elongation and clothing pressure at 10%,20%,30%,40%,50% elongation were tested and analyzed respectively. Then correlation between the force at specified elongation of elastic knitted fabrics and clothing pressure，and between the force at specified elongation and elongation percentage of elastic knitted fabrics were analyzed. The results show that correlation between the force at specified elongation of elastic knitted fabrics and clothing pressure，and between the force at specified elongation and elongation percentage of elastic knitted fabrics are highly significant and linear regression is highly significant. The clothing fitness range of different elastic knitted fabric will be calculated by testing the force at specified elongation of elastic knitted fabrics, and by means of regression equation between the force at specified elongation of elastic knitted fabrics and clothing pressure，and between the force at specified elongation and elongation percentage of elastic knitted fabrics, and by means of regression equation between the elongation percentage of elastic knitted fabrics and the clothing fitness. The research results can provide theoretical basis and practical reference for rapid calculating fitness of elastic clothing and for the design and development of elastic clothing.

Shape and structure research of trousers of Liangshan Yi minority men

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  121-125. 

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In order to help Yi minority dress’ cultural inheritance, studying the shape and structure characteristics of Liangshan Yi minority men's trousers may summarize Yi dress art scientifically and systematically. The analysis is based on the field work in Zhaojue County, Ganluo County, Meigu County, Yuexi County, Butuo and other places, and the collection of real pictures and related parameters of small, medium and big types of Yi minority men's trousers distributed at the cultural areas which in Yi language are called Suodi, Yinuo and Shizha, and then the characteristics of the shape and structure, style diagrams and structure exploded view of the three kinds of Yi trousers by the way of garment dismantling. This modest work may record Liangshan Yi people’s wisdom, and benefit future generations for their reference.

Analysis of trimming art of traditional pouch

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  126-130. 

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Trimming art of traditional Chinese pouches, which mainly contains three basic forms: braid-strip welt, cloth-strip rolloff and embroidering trimming, is an integration of pattern design, color design, weaving art and embroidery art. The first one commonly used in cucurbit pouch, fan cover, glasses bag and such; the second widely used in waist pouch from South of Yangtze River; the third craft is the most complex and always used in highly decorated square or round purse. Different pouch category, decorating style and materials affect the trimming type and appearance. The traditional pouch production process has long been forgotten, thus its academic research and protective development are necessary, and the various concerning processes need further study.

Vibration characteristics of wallboard and four-bar linkage beating-up mechanism of air-jet loom

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  131-136. 

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Abstract In view of the questions of strong vibrations and noise caused by the four-bar linkage beating-up mechanism of the air-jet loom with the speed increasing, vibration characteristics are studied by means of the theoretical analysis, the numerical simulation and the experiment. Firstly, the dynamic characteristics of the four-bar linkage beating-up mechanism are analyzed. And the influence of the four-bar linkage beating-up mechanism on the vibration of the loom wallboard is analyzed based on the finite element method. Through analysis, the relationship of the crank angle of rotation and the forces of beating-up mechanism, the maximum vibration stress and acceleration of loom wallboard are established. Lastly, the location of the maximum vibration and the maximum stress are determined. The results show that the resonance frequency of the wall wallboard is about , which is very close to the main vibration frequency of the air jet loom. The maximum vibration of the loom wallboard is mainly concentrated near the beating-up mechanism. However, the maximum stress is mainly concentrated near the middle and lower part of the loom wallboard, not the largest vibration of the loom wallboard.

Detection method of warp tension in multilayer loom for carbon fiber fabric

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  137-141. 

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The warp tension, which is the let-off mechanism of carbon fiber multilayer loom, for the study object, the article expounds the composition and distribution of tension sensor, and analysis the detection principle of warp tension, thus design a detection scheme of warp tension. Through the study of neural network, fuzzy control theory and multi sensor information fusion, the authors propose a comprehensive algorithm, which contains neural network, fuzzy control theory and multi sensor information fusion. The weights, which function are obtained by the neural network, and are obtained by the chaos optimization method, then are fused by fuzzy comprehensive evaluation. Experimental results show that the recognition accuracy of multi sensor information fusion better than single sensor, and the accuracy of the tension control of carbon fiber multi-layer fabric loom is improved.

Prediction of vortex yarn properties based on hybrid genetic algorithm and support vector regression

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  142-148. 

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Abstruct: In order to make a primary research in the relationship between the quality of drawing sliver and the quality of vortex spinning yarn. Support vector regression machine prediction model optimized by GA is built up. 19.7tex and 11.8tex vortex spinning blended yarn of polyester and viscose（the blending ratio is 67:33）is selected as the experiment object. Yarn strength and CV of yarn unevenness are predicted while four quality parameters of drawing sliver (CV of yarn unevenness, moisture regain, quantification of sliver and unevenness of quantification) are used as the input parameters of prediction model. BP neural network model is also built to make a comparison with the aforementioned model. After a comparison between these two models, the result shows that the model of the optimized support vector regression machine performed a more powerful reliability and accuracy and it can describe the non-linear relationship between the quality of sliver and the quality of vortex spinning yarn more appropriately than BP model.

Worsted spinning process parameters inversion model using mixed population genetic neural network

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  149-154. 

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Inversion model of traditional worsted spinning process parameters is defective because of unsatisfactory convergence and stability, poor generalization performance and low inversion accuracy. Besides, standard genetic algorithm (SGA) shows premature convergence in the application of complicated optimization problem. Therefore, the paper put forward an inversion model of mixed population genetic-artificial neural network (MPG-ANN) on the basis of BP neural network. First of all, the author established the prediction model by optimizing the weights and threshold of BP neural network through mixed population genetic algorithm. On this basis, the author created the inversion model of mixed population genetic algorithm according to the CV value of yarn and used it for the inversion of process parameters during worsted spinning production. Next, by taking lots of test data of field process in spinning workshops as the object, the author conducted inversion verification with the wool top oil content and spinning draft multiple of process parameters. The results show that the inversion accuracy of MPG-ANN model reaches 97% and increases by 4% relatively to SGA-ANN model. In addition, the fluctuating margin of the inversion results of MPG-ANN model reduces by 6.28% at most relatively to SGA-ANN model. Finally, the author predicted the CV value of yarn on the basis of inversion results. The average prediction accuracy increases by 4.25% relatively to SGA-ANN model, showing MPG-ANN model is superior to SGA-ANN model in terms of generalization performance.

Computer simulation and system realization of 3-D weft knitted jacquard fabric

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  155-161. 

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Aiming at solving the shortage of weft knitted facquard fabric in 3-D simulation speed and realistec simulation aspects, a computer simulation system of 3-D weft knitted jacquard fabric is established based on the 3-D virtual fabric Unity3D platform with curved surface model. Firstly, the estalishment and import of 3-D model and textuer data were realized by data acquisition and union for the curved fabric surface. Secondly, a three factors simulation algorithm for complex jacquard fabric was put forward to control the effect of the fabric model.Three factors including subsidence depth, number of iterations and sphere of influence were determined to maximize fitting with the real data of actual fabric. Based on this and combined 3-D engine Unity3D platform, the integration of 3-D model data woth2-D spatial data and 3-D virtual simulation was realized. In comparison with the simulation of the loop model, this experiment based on the real data of fabric and could be proved to be more effective for the prediction and simulation of 3-D weft knitted jacquard fabric.

Research progress of wound dressing based on silk fibroin

JOURNAL OF TEXTILE RESEARCH. 2016, 37(07):  162-168. 

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The silk fibroin degumming from silk, which have the advantages of good biocompatibility, high biodegradable, weak inflammation after implanted into body, is a natural polymer fiber protein. Thus, wound dressing based on SF would have broad application prospects. However, wound dressings made of native silk fibroin are insufficient to meet the several functional requirements of ideal wound dressing, limiting its clinical application. Therefore, many research focus on improving its function nowdays. This paper reviews the research progress of different functional dressing types based on silk fibroin at home and abroad in recent years and the application prospects of wound dressing based on fibroin have also been expected, in order to provide beneficial reference for the research on the clinical application of wound dressings.