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Table of Content

    15 May 2010, Volume 31 Issue 5
    • Amino acid profiles and tensile behaviors of egg case silk of spider Nephila clavata
      JIANG Ping;WU Mengling;XIAO Yonghong;ZHOU Bing;LIAO Xinjun;GUO Cong;
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  1-5. 
      Abstract ( 1213 )   PDF (218KB) ( 485 )   Save
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      Electronic single-fibre tensile instron and amino acid auto-analyser were used to test the amino acid compositions and mechanical properties of two types of egg case silk of spider with distinct functions, i.e. , inner cover and scaffolding egg case silks in order to investigate the relationship between the structure, mechanical properties and bio-function of these unique materials. The results demonstrate that when compared with scaffolding egg case silk, the egg case inner silk has less Gly and Proline but higher Ser and polar amino acid. Its initial modulus is smaller and the value of LC: SC is higher. Its tensile curve displays an increase in the elastic region, small extent in the yield region, and buffering state in the reinforcing region, indicating very good tenacity and reproducibility of tensile behavior.
      纤维材料
      Preparation and characterization of nylon6/TiO2 ultrafine fibers
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  6-9. 
      Abstract ( 1146 )   PDF (568KB) ( 511 )   Save
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      The electrospinning technique was adopted to fabricate nylon6/TiO2 ultrafine fibers. Scanning electron microscope (SEM), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FTIR) were used to characterize the morphology and microstructure of the resultant nanofibers. Furthermore, in order to develop a novel functional composite material for filter film and protective clothing, the antibacterial performance of the nonwoven mats against escherichia coli was also measured. It indicates that the TEOS additives are useful for modifying TiO2 nanoparticles which can be evenly dispersed in the solution, and this is very important for the preparation of nylon6/TiO2 fibers with fine morphology. When the mass fraction of TiO2 is 6% and 8%, the fibers are uniform with the least beads. As the fraction is increased to 10% and 12%, the antibacterial efficiency of the nylon6/TiO2 membrane is over 80%.

      Surface electrical properties of electrospun PVDF fiber mats
      Zhang Chuanwen;YAN Yurong
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  10-14. 
      Abstract ( 1392 )   PDF (699KB) ( 923 )   Save
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      The effects of mass concentration and nature of spinning solution, polarities and ways of applied voltage during electrospinning of polyvinylidene fluoride(PVDF)on the resulting ultrafine fiber morphology, fiber diameter and the surface electrical properties of the fiber mat were investigated, and the feasibility of preparing PVDF electret by electrospinning was also discussed. The results showed that there was certain amount of residual charge stored on the surface of the electrospun fiber mats, and it was positively correlated to the mass concentration of solution, However,the charge dissipated very quickly, which could not be used to prepare electret directly. It was found through comparison that substrates (such as tinfoil, non-woven, plastic film) with different dielectric constants had direct effect on the surface residual potential.

      Effect of heat treatment on structure and properties of PET BSY
      TANG ChengTan;Xue Yuan;YAN Zhiyong;CHEN Jianyong
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  15-18. 
      Abstract ( 1244 )   PDF (398KB) ( 502 )   Save
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      The length-wise structure, boiling water shrinkage and tensile properties of bi-shrinkage yarns (BSY) are examined before and after boiling water treatment. The bi-shrinkage yarns (BSY) is composed of preorientted yarn (POY)/fully drawn yarn (FDY) which is produced by one-step spinning process. The results show that the high-shrinkage yarn FDY constructs the skeleton of BSY, and the low-shrinkage POY forms filament loops on the surface of BSY. There are two peaks in tensile curves of BSY, which means that the two components do not break at the same time, FDY breaks first, and then POY. BSY breaking processes are different before and after being treated in boiling water. The breaking tenacity of BSY is mainly determined by FDY, and the initial modulus of BSY is mainly determined by POY.

      Characteristic differences of Lyocell fiber longitudinal image in different textiles
      WANG Jun;WANG Rongwu;WU Xiongying;;XIE Huosheng
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  19-23. 
      Abstract ( 1211 )   PDF (591KB) ( 369 )   Save
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      To improve the identification rate of Lyocell fiber in different textiles when using Fiber Image Automatically Captured and Identified System, the longitudinal images of Lyocell fiber in bulk, yarn and fabric were automatically captured and identified. Four longitudinal characteristic parameters of the fiber, including diameter variation coefficient, change ratio in skeleton direction, the luster tropism coefficient and distributing curves, were analyzed and extracted to express their longitudinal differences. It was shown that Lyocell fiber’s micro-images in bulk, yarn or fabric changed obviously in the four characteristic parameters when they were processed through spinning, knitting, weaving, dyeing and finishing. This study provides a basis for automatic identification algorithm.

      A discussion on properties of white powders yielded during package dyeing of polyester yarns
      JIANG Yuan;Ju-Fang PAN;Zhi-Jun LIAN;Jing XU
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  24-29. 
      Abstract ( 1250 )   PDF (154KB) ( 586 )   Save
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      Modern analytical technologies such as FTIR spectroscopy, 1H NMR, thermal analysis (DSC), gel permeation chromatography (GPC) in combination with conventional dissolving experiment were used to carry out a systematic study of the properties of white powders yielded during package dyeing of polyester yarns. The chemical composition, stereo structure, and crystalline properties were investigated. The results of dissolving experiment show that the white powders can be dissolved in chloroform, but not in carbon tetrachloride and ethyl ether. The results of thermal analysis reveal that the melting temperature of the white powders is around 319℃, not around 265℃ as normal PET. The results of FTIR and 1H NMR study further deduce that the main composition of the white powders is cyclictrimer of polyethylene terephthalate oligomers.

      纺织工程
      Mathematical characterization of fiber morphology in yarn assembly
      XUE Wenliang;WEI Mengyuan;CHEN Ge;CGENH Longdi
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  30-33. 
      Abstract ( 1234 )   PDF (264KB) ( 586 )   Save
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      According to the basic principle of space geometry, the fiber morphology is characterized by the curvature, torsion and relative rotation for measuring the bend deformation and torsion deformation of fiber. In doing so, the limitation of previous researches of fiber morphology only considering the characteristics of space curve is changed, and the space elastic rod model of fiber is built. At the same time, the yarn twist angle and the fiber twisting number are studied by mathematical deduction, and their relationship is analyzed. As a result, the twist angle is the integrated reflection of bend deformation and torsion deformation, but the twisting number can be used to distinguish the bend deformation and the torsion deformation, so the importance of torsion performance of fiber itself can be emphasized.

      Effect of let-off ratio in looms with double beams on warp contraction of check fabrics
      LIU Shuainan;LU Yuhua;TAN Wei;SHI Peipei;HE Xiaodong;ZHANG Yugao;ZHU Chengyan
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  34-37. 
      Abstract ( 1157 )   PDF (125KB) ( 563 )   Save
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      Check fabrics are always woven on looms with double beams because of the weave difference. For the different weaves, the warp contraction and the appearance are both directly affected by the let-off ratio of the upper beam to the bottom one. This article mainly discussed the relationship between the let-off ratio of the loom with double beams and warp contraction of check fabrics woven with pure cotton. Trial weaving showed that when compared with the weaves with low interweave frequency, the weaves with higher interweave frequency have larger warp contraction and fit for basic stitch. Whatever for gray or finished fabric, there is an excellent liner relationship between let-off ratio and fabrics warp contraction margin of basic and fancy. Through regression analysis, the liner equation for the relationship can be obtained and the correlation factor is high enough. It provides a basis for quick respond in setting let-off ratio in practice.

      Theoretical analysis of slipping property of plain silk fabrics
      Qian Youqing;ZHAO Juan;ZUO Baoqi
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  38-43. 
      Abstract ( 1231 )   PDF (213KB) ( 432 )   Save
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      Slipping of silk fabric during serviceability is a critical factor which influences fabric style and garment wearability. The slipping has a close relationship with such factors as fiber, yarn and fabric structures. Peirce’s Rigid-thread Model of the woven fabric was used to analyze the strength being subjected at the crossing point of single warp and weft during the process of stretching, and a mathematical model for calculating the slippage resistance of yarns of plain silk fabric was proposed. The relationship between structural parameter and slipping property of silk fabric was established both in theoretical and practical aspects for estimation of slippage resistance of yarns in silk fabric, thus providing a theoretical basis for the development and design of silk fabrics.

      Fabric defect detection based on fractal feature of time series
      TIAN Chengtai;BU Honggang;WANG Jun;CHEN Xia;
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  44-47. 
      Abstract ( 933 )   PDF (430KB) ( 561 )   Save
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      In order to reduce the amount of computation, fabric features were extracted after the gray value of fabric texture image was projected on one-dimensional time series along vertical and lateral direction. Fisher’s criterion was used to evaluate the discrimination between the defect samples and the normal samples. Two features of certain complementarity and great discrimination were chosen to detect defects on seven fabrics of different texture background. The experimental result showed that the false alarm rate and missing rate could be controlled below10% within a certain range of threshold values,which indicated the proposed method was efficient in reducing the amount of fractal dimension computation greatly as well as differentiating normal and defect texture.

      Knitting time forecasting of computerized flat knitting machine
      WANG Jiman;SONG Guangli
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  48-54. 
      Abstract ( 1036 )   PDF (164KB) ( 434 )   Save
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      In order to give a more reasonable knitting hours for the production and trading for the woolen knitting industry, the knitting action and process of computerized flat knitting machine were analyzed, the action elements of the knitting processes were decomposed, the time needed for every action element was measured, and their impact on knitting hours were found. From this, a mathematical model of knitting time forecasting was established, and its feasibility was verified by the comparison between the actual knitting time and forecasted time of a piece of sweater. Hence the knitting hours forecasting of the computerized flat knitting machine was realized and an objective basis was provided for cost accounting in production and market price.

      Experimental research on influential factors of binder warp shrinkage of 2.5-D woven fabric
      LI Shanshan;CHEN Li;JIAO Ya'nan;SUN Fei;
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  55-58. 
      Abstract ( 1247 )   PDF (407KB) ( 387 )   Save
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      Due to the high costs of high performance fiber, it is important to determine fiber consumption before manufacture. As the advantages of 2-2 layer-layer orthogonal angle-interlock fabric with lining, ten different kinds of fabrics were woven and the binder warp shrinkages were tested to analyze the influence of weft count, weft fineness, fabric layers and binder warp yarn fineness on the binder warp shrinkage. The results showed that weft fineness and weft count have remarkable effect on binder warp shrinkage, and fabric layers and binder warp yarn fineness have little effect. Also, the fiber volume fraction was calculated with the tested shrinkages, the data was coincident with the results of weight method. Results of this experiment provide a reference for calculating the fiber quantity in production.

      Tensile properties affected by magnetron sputtering on nylon yarn and surface morphology observation
      XIAO Hui;GUO Xingfeng;WANG Xishan
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  59-62. 
      Abstract ( 1244 )   PDF (481KB) ( 344 )   Save
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      In order to assess the effect of magnetron sputtering on textile materials, nanometer aluminum thin film was deposited onto nylon fabric by DC magnetron sputtering at room temperature. Sample fabrics were obtained under different parameters including sputtering power and working pressure. By testing the breaking strength and breaking work of the yarn of the coated fabric, the influence of magnetron sputtering power and working pressure on the tensile properties of the yarn of the coated fabric was investigated. Compared with the original yarn’s tensile properties, all the coated yarn’s breaking tenacity was improved and its CV value was reduced, the breaking work is sensitive to the breaking elongation. With the increasing of sputtering power, both breaking work and breaking elongation decreased. At about 0.8 – 0.9Pa, the breaking work and elongation reaches their maximum values. The surface morphology of sputter coated fabric were observed by atomic force microscopy (AFM), it revealed that a complete and uniform nanometer aluminum film was formed on the nylon fabric surface.

      染整与化学品
      Preparation and property of epoxy based nano- SiO2/TiO2/polyimide hybrid enhanced size for carbon fibers
      YANG Hongxiang;ZHOU Cun;XU Jinyun
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  63-68. 
      Abstract ( 1229 )   PDF (890KB) ( 583 )   Save
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      An epoxy based nano-SiO2/TiO2/polyimide hybrid enhanced size for carbon fibers was prepared by in-situ modification of SiO2/TiO2 precursor in PAA collosol with silane couple agent(WD-50) and proper surfactant through sol-gel technique, and during the preparation the ultrasonic cavitation and compounding technologies were utilized. The properties of PAA-SiO2-TiO2 hybrid sizing and micro-morphology of its film formed on carbon fiber surface were analyzed by FTIR, DSC, particle size instrument and STM. The results indicated that nanoscale SiO2•TiO2 particles dispersed in the hybrid sizing film homogeneously, and a layer of nano particles was formed on carbon fiber surface after sizing by the hybrid enhanced size, the surface of the carbon fiber looked more rough and its interfacial property was improved. Mechanical test demonstrated that both tensile strength and interlaminar shear strength of the carbon fiber sized with this product were significantly enhanced.

      Isolation and screening of microbial strains for biological degumming of ramie and evaluation of its effects
      CHEN Yangdong;CHEN Ting;LI Lijiong;CAO Zhangjun;ZHANG Xingqun;
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  69-73. 
      Abstract ( 1158 )   PDF (310KB) ( 381 )   Save
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      For screening and obtaining microbial strains for biological degumming of ramie, 38 microbial strains, including 21 bacteria, 13 fungi and 4 actinomycetes were isolated from randomly selected putrid ramie by enrichment cultivation in combination with diluted coating. Identification of the strains was performed by morphology observation, physiological and biochemical reactions, and sequence analysis of 16S rRNA. Through screening with a method of transparent zones, 9 microbial strains were obtained,which had high and stable degradation ability to gum. Among them, the bacteria were indentified as Bacillus, Acinetobacter, Paenibacillus and Burkholderia. The degumming effects of the strains indicated that the bacillus subtilis strain isolated from putrid ramie is the best, with the residual gum content only 13.82%.

      Dyeability of cotton fabric modified with dye-site improver
      LIU Lijun;YAO jinbo;LI Xuke;LIANG Fenghua
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  74-79. 
      Abstract ( 1058 )   PDF (182KB) ( 421 )   Save
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      To reduce the amount of salt in dyeing cotton with reactive dyes, the dye-site improver was used to impart cotton fibers with increased dye-sites. The effects of modification with dye-site improver on the dyeability of cotton fabric were investigated, including effects on alkaline concentration and adding time, salt concentration, dye-uptake rate, color fastness, level dyeing property and hue of the dyed fabric. The results show that the absorptive behavior of the modified cotton during dyeing with Reactive Red R02 was conformed with Langmuir-type adsorption curve, and adsorption constant(K) and saturated adsorbing capacity(S) decreased along with rising of the temperature. The dye-site improver modified cotton needed less alkaline, less salt (reduced by 40% - 60% on weight), exhibited accelerated dye uptake rate, improved color fastness and level dyeing without affecting the shade. As to adding time of alkali, it was simile to traditional dyeing process.

      Dyeing performance of anti-ultraviolet cotton fabric treated with nano TiO2
      ZHANG Nanzhe;LUI Yuexian
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  80-85. 
      Abstract ( 1134 )   PDF (143KB) ( 449 )   Save
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      Cotton fabric was treated by nano TiO2 with different crystalline structures to obtain anti-ultraviolet performance, and then subjected to dyeing with Safflower red dye. The light fastness of the dyed fabric was observed. The results indicated that the K/S value of cotton fabric treated with nano TiO2 is less than that of untreated sample. The cotton fabric treated with Rutile-nano TiO2 had higher K/S value, and less photo-aging color difference than the cotton fabric before treatment. Increasing the molecular weight of polyethylene glycol (PEG) and TiO2/PEG content, the K/S value decreased and photo-aging color difference increased. In CIE and Munsell Systems, they showed the same dyeing performance.

      Influence of dyeing and finishing process on breaking strength of cotton MVS yarn
      LIU Deju;WU Huanling;WANG Yiqun
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  86-90. 
      Abstract ( 1096 )   PDF (130KB) ( 362 )   Save
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      In order to improve the breaking strength and weaving performance of cotton MVS yarn in color weaving,the influences of dyeing and finishing process on breaking tenacity of cotton MVS yarn were investigated. The results indicated that the maximum improvement of the yarn strength was obtained when pretreated by one bath NaOH scouring and H2O2 bleaching with concentration of NaOH 5 g/L (I) and one bath enzyme scouring and H2O2 bleaching with concentration of enzymes 10 g /L (II) that made the yarn strength increased 9.0% and 13.7% respectively. Four types of reactive dyes including X, KN, K and B were selected to dye the pretreated yarns. The results showed that the strength of the dyed yarns was better than that of the sample before dyeing. Among them, B type reactive got the best results with dosage of 2% (o.w.f) in the case of (I) with yarn strength increased by 15.9% and, in the case of (II), increased by 24.5%. Data analysis shows that the appropriate wet processing can improve the yarn strength.

      Anti-bacterial and anti-UV properties of silk treated with nano-super (AB) microcrystalline dispersion
      Su Yanmeng;ZHANG Min
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  91-96. 
      Abstract ( 1162 )   PDF (1478KB) ( 422 )   Save
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      The main aim of this paper is to research the effect of nano-super (AB) microcrystalline dispersion, a kind of novel functional finishing reagent, on the anti-bacterial and anti-UV properties of silk. Silk fabric was treated with self-prepared nano-super (AB) microcrystalline dispersion through dipping-padding-baking process to render it with excellent and durable anti-UV and anti-bacterial functions. SEM and XRD were used to characterize the microstructure of the surface of silk fabrics before and after treatment. The results indicates that small and uniform nano-particles with size of 10 nm were observed on the surface of the finished silk fabric. XRD analysis shows that nano-particle on the surface of silk is standard wurtzite zinc oxide. The ultraviolet protection factor (UPF) of the treated silk fabric attains 50 + when the mass concentration of nano-super(AB)is 16 g/L. The antibacterial rate reaches more than 99% for Staphylococcus and Bacillus coli. The standard washing (soaping) test shows that the anti-UV property increases with the increase of washing times, and the anti-bacterial property is not affected.

      Trace analysis of perfluorinated compounds in textile goods by LC/MS/MS method
      LIU Huiting;JIANG Qinting;CHEN Xiaomei;ZHENG Ziqiang;ZHU Xiaoyu;YING Yibin
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  97-101. 
      Abstract ( 860 )   PDF (152KB) ( 569 )   Save
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      Ultrasonic method was used to extract PFCs from textiles, and the pretreatment process is convenient. The ten kinds of target compounds, i. e. PFHxA,PFOA,PFNA,PFDA,PFuDA,PFDoA,PFBS,PFHxS,PFOS,and PFDS were separated on C18 reversed phase column in 13 min with step methanol-5 mmol/L ammonium acetate as the mobile phase. Monitor and qualitative analysis of PFHxA,PFOA,PFNA,PFDA,PFuDA,PFDoA,PFBS,PFHxS,PFOS,PFDS were undertaken at 313.1/268.9, 412.9/368.9, 462.9/418.9, 512.7/468.9, 562.7/518.9, 612.8/568.9, 298.8/99, 399.2/99, 498.8/99, 599/99 respectively. Isotope-labeled internal standard method was used to carry out such tests as the limit of detection, linear range, and recovery range. The results showed they were 0.5 µg/m2, 0.5 ~ 10 µg/m2, and 84.6% ~ 111.8%, respectively. It should be pointed out that the limit of detection is 0.5 µg/m2 by this method which is lower than 1 µg/m2 regulated for textiles by EU. This method was accurate and swift, which has been successfully applied to analyzing 20 real textile samples.

      服装工程
      Establishment of mathematic model of flat collar band width
      Zou ping;WU Shigang;SUN Ning
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  102-106. 
      Abstract ( 1036 )   PDF (377KB) ( 618 )   Save
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      Flat collar is a kind of special structure of lapel, which has a smaller collar band width. This article mainly analyzes the quantity of overlapped shoulder line based on Japan cultural block in terms of collar band, band curvature and breast. 54 samples of flat collar were made, and their band width was measured. Factors influencing the width of flat collar band were analyzed, and a math model for design the structure and width of flat collars band was developed. The change rule of the structure and width of flat collars band was obtained through the model.

      Description and classification of young men’s body type in the west China
      QI Jing;LI Yi;ZHANG Xin
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  107-111. 
      Abstract ( 1252 )   PDF (118KB) ( 554 )   Save
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      This article introduced young men’s body description and classification method based on 3D interactive body scanning. 236 young men’s measurements were obtained through 3D body scanning and the measurement data were analyzed by using SPSS software. The results showed the young men’s body types have taken a great change when compared with the figures before two decades ago, and the current national garment standards should be ameliorated imperatively to adapt to the marketing apparel’s fitness requirements. This study divided the males’ bodies into 7 types through factor and cluster analysis, which looks more reasonable. It provides a theoretical reference for gaining new insight into Chinese young male’s body situation and benefits for modification of garment specifications.

      机械与器材
      Factors influencing compacting effect of compact spinning with perforated rollers
      GAO Jinxia;HUA Zhihong;CHENH Longdi
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  112-116. 
      Abstract ( 1001 )   PDF (1023KB) ( 402 )   Save
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      For complete understanding the factors influencing the compacting effect of compact spinning with perforated roller, the effect of negative pressure and surface friction of perforated rollers on the compacting effect was investigated by using CFD and MatLab software. The results indicated that compacting effect becomes better with deceasing of the surface friction coefficient when the negative pressure is fixed, and the critical friction can be obtained. There is a positive correlation between the critical friction and the changing negative pressure. Therefore, it is necessary to choose reasonable negative pressure and surface friction of rollers for low energy consumption, low cost, and high quality of compact yarns.

      Numerical simulation on drag reduction of rotor with non-smooth bionic surface
      SUN Zhihong;SHAN Hongbo;SHI Tingting;SUN Xuejun
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  117-121. 
      Abstract ( 1005 )   PDF (661KB) ( 586 )   Save
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      In view of the idea that bionic non-smooth surface can reduce drag, different sizes and shapes of grooves are arranged on the surface of high-speed rotors. With RNG k-ε turbulence model, the 3D flow field of the models has been simulated to calculate the drag coefficients of both smooth and non-smooth rotors respectively. In comparison with the wall shear stress of rotors and velocity field, the result shows that high-speed rotors with tiny non-smooth groove can reduce drag force of high-speed air flow on the wall of rotors, thereby decreasing energy consumption of rotor spinning machines. In addition, both depth and shape of grooves have an influence on drag force. Compared to smooth rotors, the maximum drag reduction of triangle groove rotor, semi-circle groove rotor and the rectangle groove rotor, is up to 1.271%, 1.261%, 1.385% respectively.

      Influence of supply gas pressure on air flow centerline of assistant nozzle
      LIU Lei;CHEN Xueshan;TIAN Wei;MA Leilei;WANG Xiaolin;ZHU Chengyan
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  122-125. 
      Abstract ( 1339 )   PDF (325KB) ( 353 )   Save
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      In order to avoid happening of the false intersection phenomenon, it is necessary to analyze the influence of the supply gas pressure on the air flow centerline of assistant nozzle. This paper carries out theoretical analysis of the reason leading to false intersection phenomenon of two sets of airflow jetting from the assistant nozzle and the main nozzle. Then taking Taitan TT-800 air jet loom as a test platform, the actual flow beam centerline of the Tsudakoma model HTS1-9D assistant nozzle was tested through changing the supply gas pressure. It was found by analyis that increasing the supply gas pressure, the distance from the center of the assistant nozzle to the central air jet in the inside reed canal is increased. Therefore, in practical weaving, we can adjust the installation height of the assistant nozzles to avoid "false intersection" phenomenon, and improve weaving efficiency according to the change of the distance from the center of the assistant nozzle to the central air jet in the inside reed canal.

      测试分析
      Research on energy-consumption of air-jet loom and decrease in air-consumption of relay nozzle
      XU haoyi
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  126-130. 
      Abstract ( 1248 )   PDF (137KB) ( 652 )   Save
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      Energy-saving and consumption-decreasing has been a long-standing problem to be solved in textile enterprises. By testing and analyzing the energy-consumption of air-jet loom of Picanol DELTA-190,this paper draws the conclusion that the air-consumption of relay nozzle is an important part of energy-consumption of air-jet loom, and explores the chief factors influencing the air-consumption of relay nozzle. It expounds the factors that affect the air-consumption, such as relay-nozzle pressure, the number of solenoid valve which controls relay nozzle, installation of the space of relay nozzle, allocation of the gas-storage, selection of relay-nozzle pass, structure of auxiliary-jet and adjustment of α、β、γ angle, and believes that an overall and systematic steps must be taken. Among them, the rational determination of the relay-nozzle pressure and proper selection of the energy-saving relay nozzle play the key role in energy saving and lowering air consumption.

      管理与信息化
      Inventory control policy for apparel retailing sector based on Kalman filter
      LI Jingyi;WANG XiaoFeng
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  131-136. 
      Abstract ( 1137 )   PDF (160KB) ( 386 )   Save
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      In order to help apparel retailers get accurate market information and make quick response to customers’ demand, this paper suggests Kalman filter for forecasting and discuses related inventory control policies with different lead time and order cycle time. Meanwhile, simulation is carried out to compare the effect of different inventory control policies on the profit of an enterprise level under certain service level. The results indicate that under the replenishment mode with high-frequency and small quantity can bring more profits to an apparel retailer under certain service level.

      Segmenting color region of textile printing pattern image based on the algorithem of JSEG
      LI Pengfei;WANG Gang;JING Junfeng;JIAO Ke
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  137-140. 
      Abstract ( 1165 )   PDF (337KB) ( 400 )   Save
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      In view to the problem of accurate detection of printed patterns of textiles based on the machine vision, this paper presented a method of applying the JSEG algorithm to the image segmentation of the textile printing pattern image, and completion of image region segmentation included image filtering, color vector, regional growth, and merger. The impact of the threshold value of color quantization and the threshold value of region merging on image segmentation and method selection was investigated by experiments. Finally, the results of image segmentation of textile printing pattern by using this algorithm were demonstrated, indicating that the algorithm which uses color information and regional information is efficient in image segmentation of weave information contained textile printing pattern, and shows certain inhibiting effect to some interference caused by the sun light.

      Forecasting model for apparel demand based on improved least squares support vector machine (LS-SVM)oriented to mass customization
      ZHANG Xiumei;SUN Yongjian;GUO Liangwei
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  141-145. 
      Abstract ( 1044 )   PDF (142KB) ( 384 )   Save
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      For improving forecast accuracy of apparel demand, this paper, having given full its consideration of affecting factors such as season, climate conditions, price, gender etc. developed a forecast model mainly based on least squares support vector machine, including processing the above factors with fuzzy theory and using these factors as input variables. A forecasting model mainly based on improved least square support vector machine (LS-SVM) and other methods was constructed. Dynamic forecast of apparel demand is achieved, and practical applications show that this intelligent forecasting model has high accuracy.

      综合述评
      Structure of high strength organic synthetic fibers
      YOU Xiulan;HU Panpan;LIU Zhapfeng
      JOURNAL OF TEXTILE RESEARCH. 2010, 31(5):  146-152. 
      Abstract ( 1190 )   PDF (746KB) ( 580 )   Save
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      Structure characteristics and formation processes of the typical rigid structure of p-aramid (PPTA) fibers and the typical flexible structure of ultra-high molecular weight polyethylene (UHMWPE) fibers are analyzed, in particular, the effect of spinning and heat treatment process on fiber structures. It is considered that for obtaining high-strength synthetic fibers, two conditions in structure should be satisfied: high degree of orientation and crystallinity; polymer molecular chain can be fully extended to form straight-chain crystallization. The current progress of PPTA fibers and UHMWPE fiber is also introduced. It is proposed that the polymer which can form a highly oriented structure with high crystallinity and full extension of molecular chain can be used to produce high strength fibers by controlling the spinning and heat treatment process.