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Table of Content

    15 May 2018, Volume 39 Issue 05
    • Preparation and characterization of microfluidic spinning alginate-based composite fibrous dressings
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  1-7.  doi:10.13475/j.fzxb.20170700507
      Abstract ( 359 )   PDF (2786KB) ( 206 )   Save
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      To fabricate alginate-based fibrous dressings for wound healing, the alginate-silica and alginate-hydroxyapatite composite fibrous dressings were fabricated by blending nano-silica/hydroxyapatite with alginate as core flow and calcium chloride water solution as cortical flow by microfluidic spinning. The characterization of biotoxicity, in vitro biomineralization and degradation behavior, mechanical performances were carried out. Results demonstrate that the incorporation of silica particle in alginate fibers exhibited the mineral deposition in the process of degradagion and porosity  struture appears on the surface benificial for nutrient transportation and tissue regeneration. The prompt proliferation of fibroblast and keratinocytes cells indecate no significant cytotoxicity of prepared dressings. Furthermore, the reinforced composite alginate fibrous dressings containing silica and hydroxyapatite particle decreases the degradation degree by about 20% and increases the breaking stress by about 18%, compared with the pure alginate fibers.

      Preparation and properties of collagen/high-molecular weight chitosan composite fibers
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  8-13.  doi:10.13475/j.fzxb.20170709506
      Abstract ( 434 )   PDF (1960KB) ( 198 )   Save
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      In order to improve the strength of pure collagen fibers, and based on the compatibility analysis, collagen/chitosan composite fibers with different chitosan contents were prepared by blending high-molecular weight chitosan and collagen, and wet spinning. The samples were characterized by scanning electron microscopy, X-ray diffraction, Foourier transform infrared spcetroscopy, et al. The results show that good compatibility exists between collagen and chitosan in a certain range because of the hydrogen bond interactions therebetween. In the composite fibers, the rod-like structure and certain self-assemble structure of collagen molecules change with the content of chitosan molecules. The ordered alignment degree of collagen molecules decreases with the increase of the chitosan content. Meanwhile thes,crystallinity of the composite fibers decreased, compared with the pure collagen to chitosan fibers. and the diffraction peaks of the distance between the colecular chains of collagen fibers are shifted between 6.7° and 7.5°. When the mass ratio of collagen and chitosan is 8:2, the tensile strength of the composite fibers is improved by 31.3%, compared with the pure collagen fibers while their compatibility is the best.

      High-performance polyimide fiber and its weavability
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  14-19.  doi:10.13475/j.fzxb.20170601506
      Abstract ( 976 )   PDF (1998KB) ( 227 )   Save
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      In order to develop applications of textile structure materials based on high-performance polyimide (PI) fibers, the microstructure and mechanical properties of five commercial PI fibers were analyzed. The weavability was studied by automatic rapier sample loom.  The microstructure and properties of PI fibers were characterized by Fourier transform infrared spectroscopy,  X-ray diffraction, scanning electron microscopy, the tensile testing machine and the yarn hugging testing machine, respectively. The results show that the imide degree of the high-performance PI fiber with the highest strength and modulus is up to 97.26 %, crystallinity is 19.27 % and  orientation degree is 0.92, which determine the excellent mechanical properties of PI fiber. The strength is 2 239.24 MPa and the modulus is 56.62 GPa, but the elongation rate at break is only 4.03 %. Moreover, the PI fiber has the smooth surface, dense microstructure and obvious fibrillar feature, but its abrasion resistance is very poor, which difficult itsweavbility and surface morphology of textile fabrics.

      Novel desalination process and application of regenerated silk fibroin solution
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  20-24.  doi:10.13475/j.fzxb.20170604805
      Abstract ( 546 )   PDF (1604KB) ( 121 )   Save
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      In order to improve the efficiency and reduce the energy consumption in the desalination of fibroin solution, the diffusion dialysis and electrodialysis membrane separation technique was applied to the desalination process, and the application properties of the silk fibroin solution were preliminarily explored. Factors affecting the desalting efficiency and energy, such as the concentration of silk fibroin and the pre-desalination rate were investigated. Moreover the insoluble silk fibroin powder was prepared by adding anhydrous ethanol to the silk fibroin solution, the amino acid composition of the product was determined and the silk fibroin powder was characterized by scanning electron microscopy. The results show that the optimal parameters for desalting is 5% of the concentration of silk fibroin and  40% of the pre-desalination rate. Under this condition, the desalination time is shortened to 9 h and the energy consumption (except dynamic power consumption) is 3.81x10-2 kw?h/L;the total content of serine and glycine in the product is close to 50%, and scanning electron microscopic results show that the particle size of the powder is smaller and the distribution is uniform.

      Fabrication, structure and properties of vortex core-spun yarn containing a metal wire
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  25-31.  doi:10.13475/j.fzxb.20170607507
      Abstract ( 422 )   PDF (2468KB) ( 313 )   Save
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      In order to improve the characteristics of metal wire-based conductive traces on fabrics, a modified vortex spinning method was proposed for fabricating conductive traces-oriented core-spun yarns with an ultra-fine metal wire of 50 μm in diameter as the core. The structure and electro-mechanical properties of the core-spun yarns were analyzed. The results show that the proposed vortex spinning apparatus and method are capable of continuously fabricating core-spun yarns containing the ultra-fine metal wire at a speed up to 250 m/min. The fabricated vortex core-spun yarn containing metal wire is composed of the metal wire, the untwisted parallel fibers, and the wrapper fiber from the interior to the exterior of the yarn. The positions of the metal wire in the cross-section of the core-spun yarn are mainly two types, the area between central point and 1/3 radius of the yarn, and the area between 1/3 radius and 2/3 radius of the yarn. The breaking strength of the vortex core-spun yarn containing metal wire is increased by 100%-200% compared to the metal wire. Wrapping characteristics and amount of the short-staple fibers have insignificant effects on the resistance variation-elongation relations of the metal wire core in core-spun yarn, indicating that the vortex core-spun yarn containing metal wire has similar electrical properties to that of the original metal wire.

      Color prediction of double channel digital ring spinning melange yarn based on Stearns - Noechel model
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  32-37.  doi:10.13475/j.fzxb.20170709306
      Abstract ( 628 )   PDF (1788KB) ( 136 )   Save
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      In order to study the color fiber matching rules of the melange yarn spun by digital ring spinning, three kinds of solid color yarn and two colors melange yarn were spun by gradient configuring the blend ratio of magenta, yellow and cyan fibers. On the basis of the structural characteristics of melange yarns produced by digital ring spinning, the blending effect was explored and predicted by Stearns-Noechel model. Two methods of the minimum chromatic aberration and the wavelength was put forward and compared to optimize the Stearns-Noechel model parameter M. The results show that the Stearns-Noechel model is suitable for melange yarns spun by digital ring spinning. The average color difference of the sample is 1.80 with the minimum chromatic aberration. The average color difference of the sample is 1.46 by the wavelength method. The two methods are superior to the classical color matching model, and the method based on the wavelength is better because the proportion of the average color gradient of all samples increased. It is more suitable for the color prediction of the digital ring spinning melange yarn.

      Design on printing parameters of flexible polylactic acid used in 3D printing fabric texture
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  38-42.  doi:10.13475/j.fzxb.20170701505
      Abstract ( 324 )   PDF (1619KB) ( 150 )   Save
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      In order to apply the polylactic acid (PLA) material to the3D printing clothing and study the optimum print parameter of flexible polylactic acid material, fused deposition modeling technology was used. By setting the different printing temperature, ambient temperature, layer thickness, filling speed and extrusion speeds, the effects of flexible PLA filaments were compared.The optimal printing parameters of the flexible PLA materials were as follows. The printing temperature is 205℃, the ambient temperature is 23 ℃, the layer thickness is 0.2 mm, the filling speed was 80 mm/s and the extrusion speed is 130 mm/s. The weft plain stitch is printed under the optimal printing parameters. The printed three-dimensional weft plain stitch has good printing effect and high printing precision. The relationship between loops of printed weft plain stitch could be found. The printed weft plain stitch is suitable for 3D printing clothing.

      Strain sensing of carbon nanotube yarn embedded into woven fabric
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  43-48.  doi:10.13475/j.fzxb.20170706906
      Abstract ( 484 )   PDF (1815KB) ( 187 )   Save
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      In order to study the strain sensing of the smart fabric with carbon nanotube (CNT) as the sensing element, CNT yarn was embedded into woven fabric and the  relationship between the resistance changing rate of CNT yarn and the strain of fabric was tested. The results show that the gage factor of the original CNT yarn is 1.02, the gage factor of the composite yarn treated by 5% polyvinyl alcohol(PVA) is improved to 1.43. Embedding the CNT yarn and CNT/PVA yarn into woven fabric in warp and weft direction and appling 3% strain along the warp direction, and the gage factor of CNT/PVA yarn is 0.67 in warp direction and 0.27 in weft direction, and the gage factor of CNT yarn is 0.33 in warp direction and 0.1 in weft direction. Change the warp float length of CNT/PVA yarn into woven fabric, the longer the float is, the higher the gage factor of the fabric is, and the gage factor of 6 consecutive floating lengths is 0.81. Change the length of CNT/PVA yarn embedded into woven, within a certain range, the longer the length of embedded yarn, the higher of  the gage factor of the fabric is. The experimental results show that embedded the CNT yarn of 3 cm into woven along the warp direction, the gauge factor is about 1.07 when applying the stretch of 7% to the woven fabric. The sensing woven fabric embedded the CNT yarn into plain with great sensing in small strain shows great peospect in the application of CNT yarn.

      Simulation of steady heat transfer on fabrics system embedded with heating unit in electrically heated clothing
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  49-55.  doi:10.13475/j.fzxb.20170710107
      Abstract ( 612 )   PDF (1946KB) ( 317 )   Save
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      In order to provide reference for the design and optimization of electrically heated clothing in winter, a three-dimensional finite element model combined with heating units, an air layer and fabrics was established using ANSYS system. The temperature distribution in the cross section and surface of the fabrics system were simulated and analyzed under different conditions of the fabrics, the heat units and the air layer thickness. Meanwhile, the effective thermal conductivity of the air layer was introduced and its influence on the heat transfer along the plane direction and the thickness direction was also analyzed. The results show that with the increase of the fabric thermal resistance or the thickness of air layer, the heat transferring along the thickness direction is decreased gradually and the decreased gradient becomes smaller. The heat along the plane direction transfer longer distance. By dispersing the heating area, the heat transferring along the plane direction can be increased because of the longer boundaries. With the increase of the effective thermal conductivity, both the heat transferalong the plane direction and the thickness direction in the model are increased. Finally, the heat transfer simulation results were werified by experiments, the results indicate that the outside surface temperature from simulations and experiments show a good consistency, and the maximum relative error is 9.7%.

      Preparation and properties of bicomponent spunbond-spunlance nonwoven materials with gradient structure
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  56-61.  doi:10.13475/j.fzxb.20170802206
      Abstract ( 765 )   PDF (2070KB) ( 232 )   Save
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      In order to study the influence of gradient structure on the properties of microfiber nonwoven materials, bicomponent spunbond-spunlance nonwoven materials with different weight (80, 120, 160 g/m2) were prepared by bicomponent spunbond technology and spunlace technology under different hydroentangling pressure. The influences of hydroentangling pressure on air permeability, water vapor permeability, mechanical properties and filtration performance were investigated. The results showed that the thickness, mean pore size, air permeability and water vapor permeability decreased with increase hydroentangling pressure of from 15 MPa to 28 MPa at the same weight. The tensile strength increased with the increase of hydroentangling pressure and then decreased, and the elongation at break was in opposite trend. The filtration efficiency and filtration resistance increased with the increase of hydroentangling pressure. When the weight is 80 g/m2 and hydroentangling pressure is 22 MPa, the filtration efficiency (paticle size with 0.85 μm ) and filtration resistance were 66.8% and 25.1 Pa, respectively.

      Factors influencing printing accuracy of digital printing for knitted polyester fabric
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  62-66.  doi:10.13475/j.fzxb.20170707705
      Abstract ( 658 )   PDF (1693KB) ( 185 )   Save
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      In order to solve problem of low printing accuracy of digital printing for knitted polyester fabric, cationic modification agent, sodium alginate and polyvinyl alcohol were used to pretreat fabrics, respectively, and the influence of fabric structure, type and amount of pretreatment agents and baking conditions on printing accuracy were studied. The results show that fabric structure influences diffusion and bleeding of ink droplet on the fabric. The effective porosity of fabrics is higher, the diffusion area of ink droplet on the fabric is smaller, which illustrated that fabric wettability and capillary effect of fibre or yarn are poor. A certain linear correlation exists among diffusion distance of ink droplet on the fabric, printed actual line width and the effective porosity of fabrics. Cationic modification agent pretreated fabric has the best printing accuracy compared with that of sodium alginate and polyvinyl alcohol pretreated fabric. The printing accuracy is optimum when the baking temperature is 200 ℃ and baking time is 1 min.

      Preparation of weak-light-driven TiO2 composite photocatalysts by adsorption phase synthesis
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  67-73.  doi:10.13475/j.fzxb.20170705107
      Abstract ( 437 )   PDF (2603KB) ( 201 )   Save
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      In order to expand the practical application of photocatalysis and meet the increasingly stringent environmental requirements, weak UV light-driven TiO2 composite photocatalysts with high performance were prepared by adsorption phase synthesis. Transmission electron microscopy, high resolution transmission electron imcroscopy and X-ray diffraction were employed to characterize the morphology of different catalysts. Combining the results by photoluminescence spectra with the degradation of methyl-orange excited by weak UV light, the influence of the catalyst structure on the recombination of photogenerated carriers and its photocatalytic activity was expolred. The results indicate that Ce3+ doping with low doping content (less than 0.10%) leads to the lattice expansion of TiO2 and introduced some shallow capture sites for photogenerated carriers, thus enhancing the activity of the catalyst. At high doping content (≥ 0.20%), Ce3+ doping greatly inhibites the crystallization of TiO2 and caused a large amount of amorphous TiO2 in the catalysts, which significantly depressed the photocatalytic activity illuminated under weak UV light. The higher the calcination temperature is, the more obvious the effect of Ce3+ doping on the structure and activity of the catalysts is. For photodegradation for methyl-orange with high concentration, the degradation efficiency of the optimum catalyst is two times higher than that of the commercial photocatalyst P25.

      Antibacterial and hydrophilic finishing of moisture absorption and sweat transport polyester knitted fabric
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  74-79.  doi:10.13475/j.fzxb.20170704906
      Abstract ( 518 )   PDF (1737KB) ( 261 )   Save
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      In order to facilitate the industrial production of antibacterial, moisture absorption and swea transport polyester knitted fabric, organic silicon quaternary ammonium salt AEM 5700 was used for antibacterial finishing, and hydrophilic reagent SE was applied to improve moisture absorption and swea transport of the fabric. The performances of AEM 5700 were analyzed by infrared spectrometer and thermogravimeter. By testing the bacteriostatic rate and contact angle of the fabrics, the influences of baking temperature, baking time and drying temperature to the finishing effect were discussed. Moisture management tester was used to measure the moisture absorbency and sweat transport property of the fabrics. The results indicated that the optimum heat treatment process for AEM 5700 treating moisture absorption and sweating polyester knitted fabric is. drying at 80 ℃ and curing at 160 ℃ for 1 min. The bacteriostatic rate of the fabrics finished by the process is still 93.40% after 10 cycles of strong washing (equal to 50 times home laundering), and hydrophilic reagent SE could offset the declination of hydrophilicity of the fabrics.

      Moisture absorption and sweat transport finishing o meta-aramid fabrics
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  80-86.  doi:10.13475/j.fzxb.20170406007
      Abstract ( 514 )   PDF (2226KB) ( 270 )   Save
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      In order to improve the poor performance of moisture absorption and sweat transport affecting comfortability of meta-aramid fabrics, two methods of modification with acidic potassium permanganate and plasma were used, respectively, and after that moisture absorption and sweat transpont finishing were operated. treatment,and then we made moisture wicking finishing. The results show that the surface cracks of the modified fibers bu acidic potassium permanganate are deeper and more, and the loss of weight is higher. The surface of the modified fibers by plasma contains more oxygen elements and polar groups. The content is further increased after finishing, and the largest increment occurs in hydroxyl. The strength and elongation at break decrease slightly after modification, and then increase slightly after finishing. The moisture regain increases, and the moisture conductivity, moisture permeability, air permeability and antistatic peoperty are all improved after finishing. Washability of modified fabrics is obviously better than of unmodified fabrics. Modification and finishing don’t damage the flame retardancy of fabrics. On the whole, the whole, the flame retardancy is improved. 

      Preparation and properties of photo-catalytic self-cleaning coated fabrics
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  87-91.  doi:10.13475/j.fzxb.20170703405
      Abstract ( 414 )   PDF (1628KB) ( 279 )   Save
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      Polyvinylidene fluoride (PVDF) resin and nano-TiO2 were used to treat polyester fabric as raw materials to prepare the durable textiles with the photo-catalytic self-cleaning properties. The self-cleaning properties of the coated fabric, the abrasion resistance of the self-cleaning coating and the aging resistance of the self-cleaning coating were tested by digital image colorimetric system, scanning electron microscopy and energy dispersive spectrometer. Result reveal that with the increase of the amount of TiO2, the self-cleaning effect of coated fabric is enhanced, but the rheological property of the coating pulp is deteriorated, the integrity of the self-cleaning coat is reduced, the bonding effect of PVDF to TiO2 is reduced, the abrasion resistance effect and aging resistance of self-cleaning coating are deteriorated. When the adosage of TiO2 is 33.3%, the rheological property of the coating pulp is better, the self-cleaning coat is even, the self-cleaning properties, the aging resistance and the  abrasion resistance of the self-cleaning are also better.

      Influence of clothing styles on local thermal transfer performance
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  92-96.  doi:10.13475/j.fzxb.20170704705
      Abstract ( 610 )   PDF (1790KB) ( 277 )   Save
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      To investigate the distributio features of air gaps of different clothing styles, and their influence on local heat transfer from human body to environment, three experiment shirts were designed and made with fabric the same size but different style (H-shaped, A-shaped and X-shaped). The research used the thermal infrared camera to detect the temperature distribution of the naked and the clothing surface woth high precision. Meanwhile, in order to charaacterize the local thermal transfer performance of clothing, the human body was divided into different segments, and the temperature idfference between the local clothing surface and the skinof each section was quantified. The results show that the local body characteristics influences the local thermal transfer performance along with the clothing styles. On one hand, the local thermal transfer performance of clothing has difference among the body segments;on the other hand, A-shaped shirt has the best thermal insulation performance, and its surface temperatures in the abdomen, waist, lower back, front buttock and back buttock area are significant higher than those of other two shirts, while in the upper chest, lower chest and upper back area, no sognificant differences exist in local heat transfer performance among three shirts because of the apophysis of skeletal muscles.

      Application of double pleat in apparel modeling
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  97-102.  doi:10.13475/j.fzxb.20170702606
      Abstract ( 1038 )   PDF (2430KB) ( 352 )   Save
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      Aim at the problem that the applications of spatial sculpt of double pleat in fashion design and technology were inflexible and simple, the basic forms and components of double pleat were analyzed, and the characteristics of double pleat classification and modeling are summarized. The methods for styling changes and innovation of double pleat were stated based on experiments and demonstrations. The influences of form change, aggregation change, twisting change and rotation change were elaborated. The idea expressions and application effects of using double pleat in draping for fashion were further investigated based on an application cases of double pleat. The key points, application law and skills of craft making when using double pleat in fashion design are summarized, and the constitute technology and derivative forms for double pleat application in fashion design were discussed in detail. The modeling method and design thinking of double pleat are interpreted from the innovation practice. The application rules and techniques of ruffles aresummarized, and its application field is expanded.

      Preparation of skin of thermal manikin Walter with human sweating ratio
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  103-107.  doi:10.13475/j.fzxb.20170703305
      Abstract ( 644 )   PDF (1594KB) ( 250 )   Save
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      In order to make thermal manikin Walter perspiration have the same rate as human body's, a non-uniform skin with self-similarity structure was perpared by silicone coating. According to the water vapor permeability of different components and thickness of silicone coatings the optimal coating technology was determined. Fractal dimension of three self-similarity structure coatings were calculated. The optimal coating structure was determined by analysis of the fractal dimension, thermal insulation and evaporative resistance. The non-uniform skin was made by this optimal coating structure. The evaporative resistance and thermal insulation were measured in the nude mode and clothing mode by using two kinds of skin. The results show that optimal thermal-wet comfort properties are obtained when the coating method has a fractal dimension close to the Golden Mean. The statistics indicate that the thermal insulation and the evaporative resistance measured by the non-uniform skin is higher than that measured by the uniform skin.

      Reducing yarn hairiness by wetting in ring spinning
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  108-112.  doi:10.13475/j.fzxb.20170604205
      Abstract ( 414 )   PDF (1447KB) ( 99 )   Save
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      In order to reduce yarn hairiness, a contacting wetting device between the front roller nip and guider in ring spinning frame was presented to wet the fiber strands. High speed camera was used to shoot the triangle section of water, the data shows the device with the bigger diameter guide wheel has a longer length of water triangle contacted with the yarn. By the tests of water consumption in spinning process, the data shows the device the bigger diameter guide wheel has more water consumption when the yarn count is the same. In the meantime, the bigger yarn count would increase the water consumption during the spinning process. Under these conditions, after the observation of yarn appearance and the data comparison of the harmful hairiness, the appearance of yarns in wet spinning is obvious improved, and the harmful bobbin hairiness of combed xotton yarn (JC) of 14.6 tex and JC 19.5 tex decreases by 35.9% and 41.1% compared with ring spinning, and the cone hairiness of JC 14.6 tex reduces by 41.6% comppared with ring spinning. The results show that the device with the guide wheel which could wet the fiber strand can both satisfy the good hairiness reduction effect and good yarn quality.

      Simulation and experiment on transverse dynamic vibration characteristics of yarn bundle
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  113-118.  doi:10.13475/j.fzxb.20170603006
      Abstract ( 306 )   PDF (1534KB) ( 144 )   Save
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      Yarn bundle vibration noise is one of the noise sources of tufted carpet loom. In order to identify the noise of the yarn bundle and realize the noise control of the carpet production environment, the transverse dynamic vibration characteristics of the yarn bundle of carpet loom were studied. Burger four-element constitutive model was applied to establish transverse vibration equation of axial motion of viscoelastic yarn bundle. Galerkin method was used to discretize the partial differential equations of lateral vibration, and then the Runge-Kutta method was used to solve this equation numerically. By setting different jacquard wheel speeds, respectively, the vibration equation was solved to acquir different transverse vibration frequency of yarn bundle. Under the same conditions as the simulation solution, the transverse vibration characteristics of the yarn bundle were measured by laser vibration meter. The simulation results are matched with the experimental ones in frequency multiplication while the latter is low. The results show that the vibration equation is suitable for studying the transverse dynamic vibration characteristics of the yarn bundle, and the simulation signal is the fundamental frequency signal of the yarn bundle vibration. At the same time, the transverse dynamic vibration characteristics of the yarn bundle are low frequency vibration.

      Key technologies of interconnection of circular knitting machine
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  119-124.  doi:10.13475/j.fzxb.20170900206
      Abstract ( 575 )   PDF (1741KB) ( 145 )   Save
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      In order to adapt to the production scale, network, intelligent, unmanned development trend, according to the production process requirements of knitting ciucular knitting machine, the application of internet of things technology, the brand of knitting circular knitting machine equipment interconnection key technology research, a networking solution for knitting circular knitting machines and multi-plant and multi-equipment was presented. Networking core technology issues were studied in depth including networking communication media, equipment side networking hardware module, equipment and cloud server network communication protocol and so on. The machine networking system was developed to meet the knitting circular knitting machine interconnection requirements, and the verification platform for a long-term test was done. Results show that the epuipment side network module works normally, the network link is stable, and machine network system is running well, achieved a long-range real-time monitoring of knitting circular machine.

      Segmentation of fabric defect images based on improved frequency-tuned salient algorithm
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  125-131.  doi:10.13475/j.fzxb.20170704007
      Abstract ( 523 )   PDF (2636KB) ( 122 )   Save
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      In order to improve the precision of fabric defects segmentation, an improved frequency-tuned salient (FT) algorithm is proposed for the preprocessing of fabric image. Firstly, the light source and camera are placed on both sides of the fabric to obtain the image, and the contrast ratio of defect area was strengthened by the difference of transmittance between normal area and defect area. Secondly, the non-local mean filter (NLM) was used instead of the Gauss filter in the FT method to enhance the cap ability of texture smoothing and denoising; and it is found that the NLM filter parameter has great influence on the accuracy of image segmentation. A method of parameter optimization using the average of inter-class maximum variance was proposed. Then, the improved FT algorithm was applied to the prepocessing of images to strengthen the contrast ratio of fabric defect area. Finally, OTSU algorithm was used to segment salient image of fabric defect. The experiments of image segmentation were carried out for two different fabric. The experimental result shows that the segmentation precision of fabric defects, including slab yarn, knot, broken warp, oil stain, hole and so on, can significantly increased with the improved FT algorithm.

      Design system for knitting shaped sweater based on internet
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  132-136.  doi:10.13475/j.fzxb.20170709605
      Abstract ( 276 )   PDF (1642KB) ( 140 )   Save
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      In order to realize the design knitting shaped sweater on the Internet using HTML5, ASP.NET technology based on B/S framework for the development of web applications, by research of knitting shaped sweater design method and principle analysis of sweater shaping, a calculation method was established based on parametric design process. The starting from the shaping of data structure, according to the law of shaping tablet segment, a shape shaping segment data were obtained, and a data model was established combined with the bottom shaping, organizing process, shaping complete data transformation. Using Canvas elements the system of pattern editing was achieved, according to the shaping process flow chart to achieve the design of shaping sweater. JAC, SET, SIN files after pattern compile can be exported. Taking jacquard knitting sweater design as an example, the feasibility and practicability of shaping sweater on Internet are verified.

      Printed fabric pattern retrieval based on edge and color features
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  137-143.  doi:10.13457/j.fzxb.20170711007
      Abstract ( 800 )   PDF (2206KB) ( 192 )   Save
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      The same shape filled with different solors or the same external shape comprising different intrenal shape is wery common in fabric printing. Aiming at precisely retrieval printed fabric patterns, a retrieval algorithm based on pattern edge and color features was proposed. Firstly, pattern edge image was obtained from the pretreated result with an image median filter process, and the mean value of all the edge points of the edge image from canny operate result was calculated and set as its center, then the edge points were divided into some equidistant ring regions from the center for extracting edge distance histogram as the image edge feature. Based on the line fitting results from the edge pixels, the edge direction histogram was extracted too. Secondly, the color edge was quantized in the HSV color space, and the edge color histogram was extracted as the image color feature. Finally, edge and color features were combined with different weights after normalization. Experiment results show that the algorithm has influence proposed of image translation, scaling and rotation, and the influence of edge and color features can clearly reflect in the retrieval results, so that patterns with the same shape but different colors, or patterns with the same external shape but different internal structures, can be accurately distinguished. The average precision of the algorithm is higher than 93.17%.

      Research progress of protection properties of protective clothing against steam and hot liquid spray
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  144-149.  doi:10.13475/j.fzxb.20170709806
      Abstract ( 618 )   PDF (2058KB) ( 342 )   Save
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      To properly evaluate the protective performance of protective clothing against hot water spray and pressurized steam, the current domestic and foreign studies using simulated laboratory tests were comprehensively reviewed. The potential factors influencing the protective performance against hot liquid spray and steam were analyzed from the perspective of “human-protective clothing-environment” system. The present test technologies and evaluation standards were introduced. Then, the effects of influencing factors on the protective performance were summarized. These factors were consisted of three factors, i.e., clothing factor such as basic properties of protective material and static air gap size, human factor such as body shape, sweating status, garment deformation and abrasion caused by body movement, and environmental factor, including types of thermal hazards, temperature, distance, pressure, impingement angle, etc. Finally, the drawbacks of current studies were pointed out and the development trends of protective performance evaluation were predicted. It is imperative to establish a comprehensive evaluation system to improve the accuracy of protective performance against hot liquid spray and steam.

      Integration and innovation of fiber materials and wearable technology
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  150-154.  doi:10.13475/j.fzxb.20171205805
      Abstract ( 777 )   PDF (1586KB) ( 527 )   Save
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      Aiming at the problems of the flexible and smart wearable field including single function, low battery lefe, poor wearing comfort and poor fittness to human body under three dimensional distortion etc. , the multi-interdisciplinary flexible and smart wearable fabrics based on textiles, materials, electronics, communication, biology, energy and other disciplines were researched. Meanwhile, the preparation method and the relationship between compositions and structures, the three-dimensional deformations and the performances of the fiber-based flexible smart wearable devices were researched.  The research progress of wearable technology and products in recent years were summarized, including the latest applications of fibers in flexible strain sensors, organic electrochemical transistors (OECTs), super capacitor, microbial fuel cells and other flexible and smart wearable fields. It illuminates that the integration of wearable technology and materials is an inevitable trend and objective demand for the development of wearable products.

      Laser de-bonding solution for ultra-thin flexible device processing
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  155-159.  doi:10.13475/j.fzxb.20180101205
      Abstract ( 978 )   PDF (1505KB) ( 600 )   Save
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      In order to solve the machining accuracy problem of flexible thin devices, as well as to improve the manufacturing yield, a strategy was peoposed that de-bonded thin flexible device from carrier at room temperature and stress free. Thermal stability, chemical resistance and ultraviolet transmittance of two materials were studied by characterization using thermo-gravimetric anslysis, UV-visible spectrophotometer and so on. The results show that the 5% weightlessness of laser response material and temporary bonding material were hhgher than 597 °C in nitrogen gas and 412 °C in air, respeectively. The temporary bonding pair with these glues has good chemical resistance. The UV transmittance of the laserresponse material with 566 nm thickness at 355 nm is 4.96%. Finally, basedon the 20 cm silicon wafer, a complete set of process validation and good results have been obtained, which provides a high and reliable solution for future flexible ultra-thin chip or device processing.

      Integrating of soft intelligent textile and functional fiber
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  160-169. 
      Abstract ( 892 )   PDF (3161KB) ( 765 )   Save
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      Into the 21st century, soft intelligent wearable textile products became popular. However, after several years’ development, the definition and the market requirements on this technology and products are blur and outdated currently. Low-end products with insignificant value-added products entered the market freely while the latest soft wearable intelligent textile technology is limited in the research lab, which could not be applied into the new prototype research and development. It can be forecasted that there will be a huge market demand on this high value-added textile products. Therefore, focusing on this problem and the conflicts between the upstream manufacturers and the downstream consumers, the current art-of-state and the latest technic breakthrough of functional fiber science were reviewed, and the concept of soft wearable intelligent textiles was redrfined. The characters of soft and flexible connection among electric components, the interaction between clothing and human through textile media, and electric textile components are considered as the three keystones for the further development. Additionally, when transferring lab-research result into commercial products, various design and technic factors are evaluated and comprehensively integrated and a comprehensive design strategy is come up, which can facilitate the industrial transformation of traditional textile industries.

      Recent progress of textile-based flexible mechanical sensors
      JOURNAL OF TEXTILE RESEARCH. 2018, 39(05):  170-176.  doi:10.13475/20171203607
      Abstract ( 1138 )   PDF (2282KB) ( 504 )   Save
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      In order to clarify the principle of preparation, sensing properties and applications of textile-based flexible mechanical sensors, the most recent progress of textile-based flexible mechanical sensors were described, including fabrication, properties and applications. The novelty and advantages of textile-based piezoresistive and capacitive sensors in the field of human-activity monitoring, personal healthcare and user interface were investigated. The results indicated that the sensors with one-dimensional fibrous and two-dimensional fabric structures are main structures, and the sensors with tunable substrates and devisable combinations exhibited remarkable sensing properties (linearity, non-hysteresis, repeatability, sensitivity and durability). The textile-based flexible mechanical sensors with high electrical conductivity, sensitivity and durability are the most desirable properties in the near future.