Table of Content

15 July 2011, Volume 32 Issue 7

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Study on the Correlation between Contact Angle and Radical Concentration on the Surface of Polymeric Materials Generated by Cold Plasma Irradiation

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  1-7. 

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Polypropylene (PP) and polytetrafluoroethylene (PTFE) film were treated by cold oxygen plasma for surface modification. The effects of plasma treatment parameters, chemical structure of materials and gas species on water contact angle (WCA) and peroxide concentration were investigated, respectively. An optimum treatment condition was found as 4 min, 400W and 100SCCM, by which the WCA of PP film decreased from original 99刟 to 7刟. By comparison of the influence of plasma parameters, chemical structure of materials and gas species on WCA and peroxide concentration, the correlation between WCA and peroxide concentration was found, which indicates a correlation between WCA and radical concentration on the film surface generated by plasma treatment.

Influence of extension on the side-glowing properties of POF

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  8-12. 

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In this paper two kinds of polymer optical fiber (abbreviate POF) were stretched with different elongation at different temperature to investigate the effects of axial tension on the side-glowing properties of POF. Luminance colorimeter BM-5A was used to measure the side-glowing luminance of POF after stretching, and the surface morphology of POF was tested by SEM. The results showed that light emitting fabric with good brightness and uniformity could be prepared by virtue of the extension during weaving process.

Antibacterial Property and Mechanism of Copper Alginate Fiber

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  13-16. 

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To apply copper alginate fibers in medical as a new alginate fiber, copper alginate fiber was researched and evaluated against Escherichia coli (E.coli) and Staphylococcus aureus (S.aureus), using antibacterial zone and flash shaking method, and analyzed anti-bacterial mechanism by the scanning electron microscopy (SEM). The result showed that copper alginate fibers had antibacterial effects, the antibacterial rate was 97.4% against E.coli, 66.2% against S.aureus; SEM images indicated that bacteria obviously changed after contacting with fibers, the main reason was that copper ion had a damaging effect on pericellular and cell wall. Furthermore, bacterial osmotic pressure was changed and protein synthesis were impeded, and then the normal metabolism of bacteria was destroyed, and finally, bacteria died.

Preparations and oil absorptivities of polymethacrylate sandwich oil-absorptive materials

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  17-22. 

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Hydroxyethyl methacrylate (HEMA) as post-crosslinker, semi-IPN polymethacrylate sandwich composite oil-absorptive materials were attained via suspension polymerization, its structure and thermal properties were analyzed by using Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), dynamic mechanical thermal analyzer (DMA), while its oil-absorptive properties, including oil absorbency, oil retention ratio, gel fraction, the polymer-solvent interaction parameter, were tested and analyzed. These data and analysis indicated that there was physical cross-linking structure in the feeds. As the proportion of HEMA increasing, more perfect crosslinking structure was formed. There was an excellent oil-absorptive performance when the content of HEMA was appropriate, oil absorbency, to toluene, trichloroethylene were respectively up to about 750% and 800%.

Characterization of PEK-C ultra-fine non-woven fabric-films prepared by electrospining

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  23-28. 

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Phenolphalein Polyetherketone（PEK-C）ultra-fine non-woven fabric-films was prepared by electrospinning in the solvent of DMF.The micro morphologies and tensile properties of the films were investigated by SEM and constant rate of extension testing machine (CRE). Besides,from the process, conditions of surroundings and parameters of the machine have been investigated in this paper,which may influence the morphologies of PEK-C ultra-fine fibers. The results indicated that temperature,humidity,and concentration of the solution are the decisive factors in spining,and free-defect ultra-fine fiber could be produced in suitable condition.The diameter of ultra-fine fiber mainly range from 300 to 600 nm,and the breaking strength range from 0.35-0.39N•m2/g.

The stain method for determining blending ratio of cellulose fibers and its influence factors

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  28-34. 

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In order to identify cotton and ramie and determine blending ratio of cellulose fibers based on stain and image process method, a new method for staining cellulose fibers and its preprocess condition is researched. It is found that swelling process before staining sample and testing under low temperature environment is necessary to maximize the color difference between cotton and ramie. Color forming mechanism and its influence factors are also researched. It is found that color stability in cotton is better than in ramie because of cellulose-iodine compound formed in cotton and color difference between cotton and ramie is narrowed with time elapsing under atmospheric temperature. It is also found that color stability for cotton and ramie is good and color difference among regenerated fibers, cotton and ramie is maximized under low temperature. In addition, focusing play an important role in determine stained color of fiber. The result will play a important role in determining blending ratio of cotton/ramie textile automatically.

Research on cotton blending optimization based on improved differential evolution algorithm

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  35-39. 

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For optimizing the cotton blending problem, an improved differential evolution algorithm is proposed. Firstly, a constrained optimization model for cotton blending problem is built. Then the differential evolution algorithm is improved to solve this model, which uses the penalty function to handle multi-constraints, and dynamically adjusts control parameters in the evolution process. Finally, the experiment is carried out to verify the proposed method using the actual raw cotton data from a textile enterprise. The results show that this method is superior to classifying and queuing method and genetic algorithm, which could effectively reduce cotton blending costs for an enterprise, with a high practical application value.

The dynamic regulation of winding ratio to prevent unparalleled yarn overlapping

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  40-43. 

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The yarn separation angle decreases with the spindle diameter increasing which may make yarn overlapping, edge collapsing and other problems in yarn winding. The relationship between the winding ratio and yarn separation angle were analyzed using geometrical and mathematical methods, it was found that the dynamic regulation of winding ratio can weaken the decreasing of yarn separation angle and prevent unparalleled yarn overlapping.

Circular Weaving Method for 3D Tubular Fabric

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  44-48. 

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The production methods for 3D fiber textile composites are 3D-braiding, 3D-weaving, 3D-stitching etc, but they are still not very competent at making 3D tubular fabric due to lacking of standardizing and successive production. This article presents a 3D circular weaving method which can produce 3D tubular fabric of orthogonal weave structure. Weft yarns and binder yarns are put into the tubular fabric circumferentially by shuttles, connect the warp yarns both within weaving plane and through thickness of the fabric. By this method, warp yarns could be supplied continually and 3D tubular fabrics can be produced as a standard series with high continuity and efficiency, which may have a great prospect.

Automatically fabric defect detection based on bidimensional empirical mode decomposition

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  49-53. 

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In this paper, an adaptive and multidirectional method for fabric defect detection based on bidimensional EMD was proposed. Delaunay triangular partition, radial basis function interpolation and bidimensional cubic spline interpolation were used and combined to implement the algorithm of bidimensional EMD, which was applied to decompose digital images of fabric into a set of sub-images, then sub-images contained defect features were selected to reconstruct a new image, and finally the defects could be distinguished from the binaryzation of the reconstructed image. Several different defective fabric images captured by an industrial line scan camera were analyzed using the proposed approach and the results demonstrated that features of defect contained in reconstructed images were distinguishing and had strong contrast against the background; defects could be recognized and located from binary results without other processes such as noise eliminating. This detecting method could be qualified to fabric defects.

Construction and Optimization of Heat-Moisture Transfer Model of Plain Knitted Fabric

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  54-59. 

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Based on the heat-moisture transfer mechanism and heat-moisture comfort, a heat-moisture transfer mathematical model of plain knitted fabric is established and optimized with regression analysis method in order to illustrate the relationship between heat-moisture comfort and process parameters; With surface maps and contour maps,the main factors which affect heat-moisture comfort of plain knitted fabric are discussed.With unified objective function, a thermal comfort performance evaluation system is established.This study may provide important technical references for knitting enterprises to enhance the heat-moisture comfort of knitted fabrics.

Prediction of Fabric Thermal-wet Comfort Properties based on Least Squares Support Vector Machines

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  60-64. 

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We investigate 36 kinds of knitted fabrics and their thermal-wet comfort objective evaluation indices and their subjective in-wear evaluation indices. Based on the least squares support vector machines (LSSVM), we create regression models to predict the subjective evaluation using objective evaluation indices as input. We systematically evaluate the learned regression model using statistical learning methods. Moreover, we compare the regression model based on LSSVM with the regression model based on the back propagation neural network (BP). According to the experimental results, the LSSVM model yields more accurate predictions on subjective thermal-wet evaluations than the BP model.

A plastic deformation analysis for PVC coated fabric membrane material of 2/2 plain weave

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  65-69. 

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The uniaxial tension creep tests for PVC coated fabric membrane material of 2/2 plain weave were executed on the warp and weft direction, while plastic deformation of the specimen were measured after 1 year. Using multiple functions from the product of both the stress difference power function and the time power function, the experiment data was studied on a multiple regression analysis. It was concluded that the model had better fitting results. At the same time, an instantaneous plastic and a transient plastic terms of the total plastic deformation were analyzed. It was showed that the instantaneous deformation was the main part of the plastic deformation, that the transient plastic terms was a minor part of the plastic deformation and the transient plastic terms would become smaller and smaller with time extension.

Morphology and Performance Properties of Polyether Block Aminopolysiloxane

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  70-74. 

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Morphology and chemical structure of linear polyether block aminopolysiloxane (BPEAS) assembled on the silicon were investigated by atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS) and its performance properties on the fabric were studied comparatively. The results indicate that BPEAS can form a film with a nonuniform microstructure, the morphology of which was mainly composed of continuous phase with a nonuniform structure attributed to polysiloxane backbone in BPEAS and clusters of vertical spikes assigned to the aggregation of the polyether groups resulted from water absorption in the air. Roughness analysis of the film surface shows that the root mean square roughness of the film surface is 0.419 nm in 2×2 μm2 scanning region with scale data (SD) of 20 nm. Application experiments results show that the softness of fabric treated by BPEAS has been improved obviously, and the cotton fabric treated by BPEAS exhibited the best performance properties compared with that of N-β-aminoethyl-γ-aminopropyl polydimethylsiloxane (ASO-1) and polyether silicone oil, such as Epoxy / polyether modified silicone oil (CGF).

The study of microbial and steam explosion united technique in hemp degumming

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  75-79. 

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To shorten the duration of hemp degumming and increase the fiber quality, microbial and steam explosion united degumming technique was studied. In this study, hemp was treated by fast retting using Dm111 strain and followed by steam explosion treatment. Different parameters of this technique were tested. The results indicated the best united-degumming conditions were: during the microbial retting, hemp was incubated with Dm111 strain at 35℃ shaking-flask 180 rpm（revolutions per minute）for 6 hours; And the steam explosion was performed in a holding-time of 120 seconds and a pressure of 2.5MPa. After treated by this technique, the analysis data showed that the cellulose of hemp was 77.01%, and the pectin, hemicelluloses and lignin were removed by 89.15%, 33.75% and 30.64%, respectively. The degree of fiber separation was 689 mm/mg and the strength of fiber was 80N.

The ramie fiber treated by Supercritical co2 fluid

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  80-83. 

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Components, dyeing property, whiteness, strength and permeability were measured to investigate the changes in components and performance of ramie fiber by supercritical co2 fluid. The results indicated that the pectin content of the hemp fiber decreased after treated by supercritical CO2. but led to an increase in the permeability and dyeing property, increase the wearing performance of ramie fabric.

The Mechanism Study of Dye-free Coloration on Wool based on Tryptophan

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  84-89. 

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In this article, According to the theory of the tryptophan reacted with the benzaldehyde derivative, 3,4- dihydroxy benzaldehyde was chemically reacted with the wool fabric under the acid condition, to achieve the coloration purpose. The results showed that the fastness of treated fabric was up to 4 grade or above. Meanwhile, the surface of fiber had not been changed, with the breaking strength not being affected, and the reacting time had been also reduced greatly. The optimal condition for wool coloration with non-dyestuff was: the concentration of 3,4- dihydroxy benzaldehyde solution and concentrated nitric acid 2.5% and 1.5% respectively, reacting temperature 70℃ and reacting time 2 min, bath ratio 1:25.

Research on antimicrobial finishing of cotton knitted fabrics with nano-silicone acrylate emulsion containing silver

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  90-93. 

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In order to prepare antibacterial cotton knitted fabric,In this paper,use nano-silicone acrylate emulsion whice contain silver ions to finish cotton knitting fabric,study on liquor ratio、pH、curing temperature and time which affect antibacterial effect of finfished cotton knitted fabric,use the rate of antibacterial as a measure of antibacterial effect,Obtained better antimicrobial finishing conditions by single-factor test: liquor ratio1︰50、pH=5、curing temperature 160℃、curing time 180s.And then whiteness、mechanical properties、permeability、antibacterial effect and washing durability of finfished cotton knitted fabric were tested，whiteness was down 20.6%, bursting strength keep at 81%,the rate of permeability has dropped 15%, the rate of antibacterial against S.aureus and E.coli is more than 98%, and the rate of antibacterial of antibacterial Fabric maintained above 80% after washed 30 times.

Effect of enzymatic pretreatment on flame-retardant finishing of wool

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  94-98. 

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Wool fabrics were pretreated with proteases, followed by zirconium flame retardant finishing. The enhancement of flame-retardant effect of wool via Savinase pretreatment was studied and the performance of finished wool fabrics was determined. Compared with FT-IR of the fabrics before and after flame-retardant finishing, scanning electron microscopy (SEM) analysis of the ignition residues and thermogravimetric analysis, it was confirmed that Savinase protease pretreatment of wool can destroy the surface structure to some extent, and facilitate the adsorption of flame retardants onto wool fibers. Enzymatic pretreatment efficiently decreased the char length of flam-retardant finished fabrics after vertical burning, and increased 5.6 percent of the limiting oxygen index (LOI). These results showed that protease pretreatment further improve the flame-reatardant effect of wool fabrics. improve the flame retardance of wool.

The Study on electroless of copper on polyester/polyaniline composite fabric with ultrasonic

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  99-105. 

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Polyester/polyaniline composit fabric were metallized through electroless plating of copper uniformly with the ultrasonic. The effects of depositing conditions of polyaniline, the sensitization and the activation condition of the electroeless plating and ultrasonic on the square resistance surface resistivity, the weight gain rate of PANI and fastness were discussed. The corrosion resistance of polyester/polyaniline, the polyester/copper and the polyester/polyaniline/copper composite fabric were compared by dipping and anodic polarization.The surface properties of the different samples were characterized by scanning electron microscope (SEM). It was indicated that the intermediate polyaniline layers can reduce square resistance of the metallized fabric, at the same time enhanced bond properties between the metal and fabric and increase the corrosion resistance of conductive composite fabric. Also, the ultrasonic can promote copper depositing on the surface of composite fabric uniformly.

Research on Pilling Resistance of Cashmere Knitting Finished with Sericin

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  106-110. 

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The cashmere knitting was finished with sericin solutions in order to improve its pilling resistance. The relationship between the finishing processing parameters and the propensity to pilling was analyzed and the laundry-proof property of the finished cashmere knitting and the unfinished one was compared too. The results show that, under the condition of the concentration of the sericin solution 8%(on the weight of fabric), the pH value 6, the temperature 50℃, and the impregnating time 30 minutes, the pilling property of the cashmere knitting can be improved in great degree. The pilling grade of the finished cashmere knitting can also be enhanced by more than one grade. The perfect laundry-proof property can keep the pilling grade of the finished cashmere knitting after washing 20 times the same as the unwashed. The properties such as moisture regain, shrinkage and fabric bursting strength were tested and compared. It shows that these properties of cashmere knitting were improved after finished, and the feeling of the finished one that decreased slightly is pretty soft.

Forecast of women's SS fashion color based on BP neural network

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  111-116. 

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This paper aims to deeply explore and intuitionally express the changes of fashion color characters with the application of scientific CIELab color measurement and Women’s SS fashion color Card released by domestic authority from 2001 to 2011. The Partial statistics and chart analysis of color card Quantitative sample show that there is Triple Features of Women’s SS fashion color, constant, gradation and mutation. On the basis of this, fashion color hue and tone number, as well as the tone distribution of red color corresponding to the min and max value of L*, a*and b*, are Forecasted and estimated in 2011 and re-forecasted in 2012 by the use of the BP neural network. The results of each forecast in 2011 are basically coincident with the actual fashion trends release, which shows that a scientific, comprehensive, continuous fashion color forecast is done and the fashion color forecast theories are enriched.

Application of denim designs of the post-modern period

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  117-121. 

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Since the post-modern period, the fashion design has emerged varied forms. The design methods on denims are springing up one after another. Besides of constantly updated techniques of after-finishing on ready-to-wear, the abundant decoration process have also become important design links, which include worn, dyeing, printing, patching, decoration, stitch etc. With hundred years of cultural tradition, jeans keep staying ahead of the fashion, emit a brand new charm..

Implications To Modern Home Textile On The Basis of Folk Costume Symbol of Shengpu Watery Region

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  127-131. 

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The Numerical Simulation Research of The Cross Abnormity Fibre With The Extrusion Process Based on PolyFlow

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  132-136. 

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The numerical simulation of the cross abnormity fibre with the extrusion process was researched based on polyflow software in this paper. The simulation results indicate: The reorder of the extrusive velocity and the extrusion swell of the polymer melt are arised after the spinneret. And the surface tension is the main factor of the transformation of the fibre section. So the tension factor to the fibre spinnability should be considered to the design of the spinneret. To obtain the accurate section of abnormity fibre, the numerical simulation of the antidromic extrusion process of polymer melt should be accomplishec before the design of spinneret. The research results will have the important effect to the exploiture of abnormity fibre.

The effect of yarn trajectory cross-sectional shape of cyclone on yarn properties

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  137-141. 

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In order to further optimize the inside structure of cyclone setting and improve the quality of yarn, in this research, two cyclones with different yarn trajectory cross-sectional shape were designed and used to reduce hairiness of the ring spinning. The performance indexes of yarn such as filoplume, fracture strength and unevenness were tested, and the effects of yarn trajectory cross-sectional shape on yarn properties were analyzed in comparison with the traditional ring spinning. The results showed that the two cyclones with different yarn trajectory cross-sectional shape both had great effects on the ring yarn qualities. Due to the difference of the state of air flow in the two yarn trajectories, their effects on the yarn properties were different. Under the same spinning parameters, the properties including the 3mm and more hairiness number, breaking strength and unevenness of yarn by cyclone with circular yarn trajectory were better than the oval one.

Appearance simulation of yarn based on NURBS surface

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  142-145. 

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In view of the appearance simulation of the yarn, this paper established the yarn cross-section model to determine the control points of yarn. Non-uniform rational B-spline (NURBS) algorithm to fit the points form the appearance surface of the yarn, by modifying the power factor, anti-insert node, modify the control points of the method to modify the yarn surface. In the modified method of control points has been improved, can also modify the number of control points to modify the shape of the yarn surface. The experimental results show that: use this algorithm for yarn simulation, and ensure the appearance of the yarn surfaces are relatively stable; of these three methods can simulation of yarn appearance, the third method simulation effect best in the improved, achieve the expected purpose.

Automatic Recognition of Arbitrary Pieces for Wool Knitted Clothing

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  146-149. 

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This paper proposes a new automatic recognition algorithm for wool knitted clothing based on fuzzy theory. This new algorithm can recognize arbitrary clothing pieces by computer and provide evidences for continue process sheet calculation, size parts recognition and process formulation. Firstly, it does digitized description for clothing pieces by clothing pieces’ data model based on key points, and proposes a contrast method between arbitrary and standard clothing pieces. Secondly, it gives a membership function between two arbitrary and standard clothing pieces based on key points and contour points according to equal proportion transformation of clothing pieces. After normalization processing by this membership function, a general membership function for determining the classification of arbitrary clothing pieces is obtained. Finally, we compile some programs to verify above algorithm and obtain an experimental result that the recognition accuracy of arbitrary clothing pieces can reach more than 95%. From these results, we conclude that the classification of arbitrary clothing pieces can recognized more accurately by this algorithm.

Evaluation and Optimization of Apparel Supplying - Purchasing Process

JOURNAL OF TEXTILE RESEARCH. 2011, 32(7):  150-154. 

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The paper is based on the evaluation of procurement process between apparel suppliers and purchasers. It analyzes the evaluation indicators between the two sides through questionnaire survey in enterprises, depth interviews, AHP and SPSS statistical software. It also focuses on the main factors, which are extracted from principal component analysis of the suppliers and purchasers, and to improve the optimization of apparel procurement process.