Table of Content

15 August 2013, Volume 34 Issue 8

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Relationship between morphology of electrospun thick/thin composed fibers and performance and structure of membranes

Dan-Fei WANG lei-gen liu PAN Zhi-Juan

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  1-0. 

Abstract ( 744 )   PDF (1531KB) ( 544 )   Save

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In this study, PSU nanofiber membranes were produced by dissolving PSU particles in a mixed solution of DMF and acetone through electrostatic spinning. PSU nanofibers with different diameters were fabricated by adjusting the concentration of spinning solution to investigate their influence on pore structure, permeability, and filtration performance. As a result, the permeability, mechanical property, pore structure and porosity of thick/thin composed nanofiber membranes were in the middle of PSU-18 and PSU-22. Furthermore, PSU-18 has the highest filtration efficiency and pressure drop and PSU-22 has the lowest, while thick/thin composed nanofiber membrane has higher than 99% filtration efficiency and lower pressure drop. Composite nanofiber membranes produced with the concentration of 18% 、22% 、22% in three nozzles respectively have the best capability in filtration due to denser arrangement of the fibers comparing with other membranes in different formation.

Antibacterial mechanism and performance of PLA/TP composed nanofiber membrane

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  6-0. 

Abstract ( 803 )   PDF (1936KB) ( 457 )   Save

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The electrospinning is conducted with Polylactic acid (PLA) mixed with Tea polypheno (TP) so that the PLA/TP composite nanofiber films have high antibacterial function. An investigation into the composition, antibacterial performance and mechanism of this composite nanofiber films using infrared spectroscopy (FT-IR), inhibition zone method, oscillation flask method and Transmission Electron Microscope (TEM). IR spectra results showed that the TP and PLA composited well by combing valence bonds in PLA/TP nanofiber films. The result of antibacterial experiment indicated that the antibacterial perfoemence increases as TP content increases. The width of inhibition zone and against Escherichia coli and Staphylococcus aureus are increased from 3.67 and 3.71cm to 5.17and 5.67cm respectively. The inhibitory rate increased from 20.6% and 21.3% to 96.9%and 97.6% respectively. The result of TEM indicated that PLA/TP composite nanofiber films lead to the death of bacterium according to the destroy the integrity of cell membrane.

 Adsorption kinetics and thermodynamics of copolymethacrylate fibers to  trichloroethylene

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  12-0. 

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The copolymethacrylate fiber with oil-absorbing properties which is prepared by using poly n-butyl methacrylate (PBMA) as monomer and hydroethyl methacylate (HEMA) as potential crosslinking agent is used in this paper to explore the Adsorption kinetics and adsorption thermodynamics of oily organic compounds ( such as trichlorethylene).The results show that : the capacity of the TCE adsorption on the copolymethacrylate fiber increases with the high temperature ;the adsorption reaction of the TCE adsorption on the copolymethacrylate fiber was consistent with a pseudo second order kinetic equation , and the adsorption isotherm could be described with Langmuir and Freundlich equations; the adsorption of TCE is a spontaneous and decalescence adsorption process.

Effect of slow coling temperature on structure and properties of PPS fibers

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  17-0. 

Abstract ( 604 )   PDF (1047KB) ( 322 )   Save

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The brittle of Polyphenylene sulfide (PPS) is strong, and it affects the spinnability of fibers. The slow cold device is added to change the state of aggregation structure, then to improve the toughness of PPS fiber. Effect of slow cold temperature on the structure and properties of PPS fiber is studied,the results show that slow cold temperatures have a greater impact on the degree of crystallinity of the PPS fiber, among them, with the slow cold temperature increased, PPS UDY crystallinity decreased, the reduced rate was 29.8%; but the crystallinity of PPS DT also increased , the rate of increase was 12.0%; with the slow cold temperature increased, the orientation degree of UDY decreased gradually, the reduced rate was 7.8%, orientation degree of DT yarn increased gradually, the increase was 15.3%,when the temperature was 175℃,it decreased; with the slow cold temperature increased, The breaking strength of PPS DT wire increased gradually, the maximum increase was 9.9%,it began to decrease at 175 ℃, the breaking elongation had the opposite trend, the largest decline was 31.2%; with the slow cold temperature increased, the drying shrinkage of the PPS fiber reduced gradually, the largest drop was 46.6%, when the temperature was over 175℃, the drying shrinkage began to increase, the initial modulus increased gradually with increasing slow cold temperature, the maximum increase was 12.7%.

High temperature resistant PTFE membrane filter  prepared by adhesive-free hot-pressing

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  22-0. 

Abstract ( 854 )   PDF (1203KB) ( 377 )   Save

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Polytetrafluoroethylene（PTFE） membrane filter material was fabricated by hot lamination process which was pretreated with self-developed PTFE foam coating agent. SEM analysis showed that surface filtering is the main mechanism for the dust removal, the results of fastness test and the study on filtering properties indicated that PTFE membrane combined firmly with the PPS based filter media. The advantages of PTFE membrane filter media were high dust removal efficiency, high filtering precision, low run resistance, easily to remove the dust and long natural life and so on. It can effectively control the emissions of super fine dust such as PM2.5, and it could be widely applied in coal fired power plant, cement industry, garbage incineration, chemical plant and other relative areas for the removal of high temperature dust.

Structure and filtration performance of automobile engine oil filter materials

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  27-0. 

Abstract ( 838 )   PDF (1432KB) ( 526 )   Save

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It is used the fiber diameter of 3.42 and average pore diameter and porosity of 23.6 and 95.07% of glass fiber nonwoven as the filter material, then use the grain diameter of 13.076 A3 powder as impurity particles, and the dynamic viscosity for 1.275×10-2 Pa ? S of YH-15 engine oil as the testing liquid. So the D-30 multiple-experiment equipment was used to simulate the automobile engine oil filtration process and filter performance. According to the test results, firstly establishing impurities particle interception model and calculating the filtration efficiency of nonwoven and fiber and QF. The experimental results indicate that the pressure drop of glass fiber nonwoven increases as the increasing of time and particle mass. Additionally, the filtration efficiency of nonwoven is higher than fiber, and have the same change trend. The QF value can be used to express the filtration effect of glass fiber nonwoven, and the QF decreases as the decreasing of impurity particle diameter and the increasing of filtering time.

Movement law of nep in electrostatic field

Ji-Peng CAO

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  33-0. 

Abstract ( 605 )   PDF (1446KB) ( 371 )   Save

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Movement law of nep in electrostatic field was studied. Some fiber neps and seed coat neps (SCN) were randomly selected from different materials and placed in a self-made electrostatic device, and their state of charging and take-off was observed by adjusting static voltage. The volatages of different neps when they take off electrostatic plate were recorded and the ranges were also obtained. The results show average electric field intensity of SCN is bigger than that of fiber nep when they take off electrostatic plate. The average electric field intensity had a positive linear correlation with their average size. These conclusions laid the theoretical foundations for applying of electrostatic web-cleaner on carding machine.

Prediction for effect of environmental factors on silk fabric mechanical property by BP neural network

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  39-0. 

Abstract ( 681 )   PDF (818KB) ( 354 )   Save

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For the problem of humidity, temperature, PH value and their interaction can accelerate the aging of silk fabrics, the BP neural network model can predict the mechanical properties of silk fabrics in the different environmental factors. First, using L9(34) orthogonal experimental to design the interactive environment and begin the aging treatment of silk fibers for about 24h. Second, using the type 3365 Instron universal material testing machine to test the breaking strength of silk fabrics, and using the breaking strength value of silk fibers as the BP neural network training sample, then establish three-layer neural network to train and predict. The result show that the relative errors of the training output values and the actual experimental values are less than 0.005%, and BP neural network can predict the mechanical properties of silk fabrics effectively.

Influence of intertexture on construction and elasticity of seamless underwear fabrics

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  42-0. 

Abstract ( 684 )   PDF (1353KB) ( 401 )   Save

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16 kinds (4 groups) of intertexture fabrics were designed and knitted with plain plating stitch and N6 looming densities in the program, using cooldry, theermolite, tencel and core-spun spandex/nylon yarns as the face yarn and the ground yarn respectively. The course count, wale count, surface density and thickness, elongation rate, and elastic recovery were tested. The influence of intertexture on the construction, specification and elasticity of seamless underwear fabric was investigatek by analysis of variance. The results showed that intertexture has significant influence on the course count, wale count, surface density, thickness, and elongation rate but little effect on the elastic recovery of the fabrics. For ovtaining fabric with greater surface density, thickness, and elongation rate, it is suggested that the way of intertexture be: core-spun spandex yarn and non-spandex yarn are arranged in an interval of 1 strand as the face yarn and the ground yarn, or non-spandex yarn as the face yarn and core-spun spandex yarn as the ground yarn. The research results provide certain reference for the design and development of seamless underwear.

Evaluation of hand for terry towels based on PhabrOmeter

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  48-0. 

Abstract ( 964 )   PDF (1008KB) ( 469 )   Save

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A novel approach called Fabric Evaluation System PhabrOmeter 3 was used to quantify the hand of terry towels. In order to explore the applied value of new instrument in softening effect evaluation, the test data was compared with the subjective evaluation. The terry towels, which were used to subjective and objective fabric performance test, were treated by 3softeners with high and low concentration firstly, and then conditioning in a constant temperature and humidity environment. Results showed that PhabrOmeter not only provides a convenient and efficient way to test fabric hand, including stiffness, softness, smoothness, draping values and relative hand value, but also reveal the effect of different softeners on fabric hand and the difference finishing effect of concentrations. If sorting the samples by softness , the order was consistent with the subjective evaluation.

Testing and analysis of phase change textile thermo-regulated performance

Hai-Xia ZHANG xichang zhang

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  52-0. 

Abstract ( 537 )   PDF (976KB) ( 375 )   Save

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In order to test and analyze the thermo-regulated performance of phase change textiles, cooling test and heating test were respectively designed, and the thermo-regulated performance of some phase change textiles was investigate by two methods (i.e. temperature change velocity and temperature change time ). The results show that the experimental results of cooling test and heating test have basically the same. The temperature change velocity method can get more comprehensive information, and the temperature change time method is relatively simple and fast. The test results of two methods are basically the same and can be chosen according to need. Compared with the normal textiles, the temperature change of phase change textiles during the process of cooling and heating is more slowly, so the thermo-regulated performance is better. The fabric specifications, such as thickness and tightness, have an effect on the thermo-regulated performance of phase change textiles to a certain extent.

Design of sand washed like semi-formed denim fabric based on digital jacquard

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  56-0. 

Abstract ( 604 )   PDF (1557KB) ( 346 )   Save

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Based on the problem caused by a large amount of consumptions for water, energy, and labor from fancy denim products, this study proposed a new fabric design approach and technology to circumvent this type of problem. The paper proposes the design concept to imitate semi-formed jeans with washing and grinding effects through digital jacquard design. A type of digitalized and fixed imitation image on typical denim jeans needs to be processed through computer-aided design. Variable shade structures respectively based on some typical denim weave are studied, and then innovative fabrics directly produced by the jacquard weaving can be shown and present certain denim washing and grinding effects. The paper gives design pattern which is especially for the integrated and semi-formed denim fabrics and clothing style, and presents a successful design experiment and methodology. The experiments ultimately have proven that this approach can not only achieve the eco-design and production of the denim without washing and grinding, but also improve the realization of the denim fabric and garment production efficiency and high value-added.

Transition design of multi-bar raschel cotton-lace fabrics

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  61-0. 

Abstract ( 794 )   PDF (2505KB) ( 534 )   Save

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As the cotton is shorter and its intensity is lower, transition design of multi-bar raschel cotton-lace fabrics has some restricted factors. Via systematically analyzing large amounts of multi-bar raschel cotton-lace fabrics and combining characteristics of cotton yarn, this paper elaborates the significance of transition design in cotton-lace fabric design. Also, the corresponding transition elements and its application methods are summarized. Moreover, the influence of different arrangements of patterns on the transition design of the main patterns is analyzed. Simultaneously, the restriction of transition design on raw materials selection and the corresponding solutions are further investigated. This research provides the ideas and methods for multi-bar raschel cotton-lace fabrics, which is beneficial to improve its overall level.

Compressive properties of three-dimensional full five-directional braided composites

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  68-0. 

Abstract ( 684 )   PDF (1193KB) ( 394 )   Save

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High strength alkali-free glass fibers were used as raw materials in the paper, and three-dimensional five-direction and full five-directional braided fabrics were both prepared on full-automatic modular braided machine by using braided craft of four-step rule 1×1. Three-dimensional five-direction and full five-directional braided composites were prepared by combined braided fabrics with resin matrix, which including epoxy resin E51 and firming agent 70＃ (tetralin phthalic anhydride). Compressive properties of above braided composites were tested by using Instron universal testing machine, and influence of structure parameters, like axis yarns, braided angles and fiber volume fraction, on compressive properties was studied too. The results shows that compressive properties increased with the increase of axis yarns and fiber volume fraction, and decreased with the increase of braided angles. Compressive property of three-dimensional full five-directional composites were better than that of three-dimensional five-directional ones.

Method of computer union color measuring and matching for PA/cotton fabric

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  72-0. 

Abstract ( 572 )   PDF (1280KB) ( 313 )   Save

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Considering the staining concept, the union color formula of PA/cotton fabric was established based on the theory of computer measuring and matching color. The influence degree of acid dye staining on cotton and reactive dye on PA were studied, and the results showed that the influence of acid dye staining on cotton could be neglected but the influence of reactive dye on PA could not be neglected. The union color formula was simplified according to this result. The matching union color method of PA/cotton fabric was established and the accuracy of this method was tested. The result showed the union dyed PA/cotton fabric was available. The staining concept was implanted in the theory of measuring and matching color, and the method of matching union color on PA/cotton fabric was established in this paper. It provided reference for the application of computer measuring and matching union color on two-component fabric.

Study on hydrolysis kinetics of reactive dye in dye/D5 suspending system

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  77-0. 

Abstract ( 784 )   PDF (1296KB) ( 441 )   Save

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Hydrolysiskinetics of reactive dye in dye/D5 suspending system has been investigated using HPLC. In order to explore the mechanism that dyeing in reactive dyes/D5 suspending system can get high fixation ratio since just a little water was used. Hydrolysis kinetics was studied using C.I. reactive195, at pH11, temperature interval of 60,70 and 80℃, in simulation hydrolysis conditions. This study has shown that hydrolysis of dye in dye/D5 suspending system was very lower to that in aqueous system. The amount of complete hydrolysis dye reduce 27.8% at 60℃, 57.8% at 70℃, 51.1%at 80℃, hydrolyzed 90min at pH11. And at the same temperature, the rate constantswas1.8 times lower than the rate constant in aqueous system. When hydrolysis performed in the presence of fabric in dye/D5 suspending system, the amount of complete hydrolysis dye reduced while the rate constants also decreased.

Absorption performance of acid dyes on soybean/casein/polyvinyl alcohol blend fibers

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  83-0. 

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C.I. Acid Blue 113 and C.I. Acid Blue 168 were applied to dyeing of soybean/casein/polyvinyl alcohol blend fiber (short for double protein fiber) and soybean/polyvinyl alcohol blend fiber (short for soybean protein fiber). The absorption thermodynamics performance of acid dyes on double protein fiber and soybean protein fiber were compared by Langmuir and Langmuir+Nerst absorption equations. The thermodynamics parameters of Langmuir+Nerst equation were also investigated. The difference of absorption properties between double protein fiber and soybean protein fiber were also analysed. It was found that Langmuir+Nerst equation can better fitted the absorption of acid dyes on double protein fiber and soybean protein fiber. The equilibrium absorption of acid dyes on double protein fibers was higher than that of soybean protein fibers. The electrostatic interaction force between C.I. Acid Blue 113 and regenerated protein fiber was stronger than C.I. Acid Blue 168.

Influence of novel thickening system EcopO-2 on hand feeling of pigment printing fabrics

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  89-0. 

Abstract ( 608 )   PDF (1337KB) ( 355 )   Save

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The impacts of the new thickening paste EcopO-2 and other common synthetic thickening pastes on the hand-feel of pigment printing were compared, and the mechanism for the significant hand-feeling improvement of the new thickening system in pigment printing was explored. The results showed that: the application of new thickening paste EcopO-2 with the high-quality adhesive, can significantly improve hand-feeling of pigment printing, the stiffness test and PhabrOmeter determination indicated that the printed cotton fabric as well as silk fabric showed a hand-feeling with corresponding level of the dye printing. The weight change test of the printing paste film, EDS elemental analysis and TG analysis showed that EcopO-2 plays an important role in the hand–feel improvement of the pigment printing. The basic reason could be that not only the EcopO-2 thickening system has very low solid content, but also the small molecules of its inner phase material could get into the adhesive film to plasticize and soften the film.

Performance evaluation of novel thermo color-change and energy-storage materials

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  95-0. 

Abstract ( 713 )   PDF (1294KB) ( 392 )   Save

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The self-made thermo color-change and energy-storage materials were finished onto the fabric with waterborne polyurethane(PU) by conventional coating method. The main processing conditions such as curing temperature, curing time and coating weighy were studied. When the curing temperature was 140°C, curing time was 3 min and coating weight was 50 g/m, the good discoloration performance and nice energy-storage property of the fabric treated with thermo color-change and energy-storage materials were obtained. Images of scanning electron microscopy (SEM) tests showed the thermo color-change and energy-storage materials were fixed firmly on the fabric, which ensured the durability of the performance of treated fabric. The DSC test of the treated fabric demonstrated obvious thermoregulatory performance, with the initial phase change temperature 32.5°C, enthalpy up to 7.388J/g, and thermoregulatory value up to 1137.752J/m².   

Antibacterial in -situ treatment of silk fabrics with nano silver

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  100-0. 

Abstract ( 1050 )   PDF (1386KB) ( 344 )   Save

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The influences of silver ammonia solution concentration, reaction temperature and treatment time on the adsorption capacity of the silver were investigated. The suitable processing of loading silver for silk fabrics was achieved. The silks prepared with this method had good antibacterial effect for Escherichia coli and Staphylococcus. The antibacterial silk fabrics prepared had good washingfastness.

 Development and ergonomic evaluation of overall for oil tank cleaner

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  105-0. 

Abstract ( 606 )   PDF (1085KB) ( 413 )   Save

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According to the results of the field study and the principle of protection priority, a new protective overall which is specially improved in waist, knees and openings of sleeve and leg was designed and made of selected material. Ergonomic trials were used to evaluate the properties of the garment. The contraction of cartridge peats in waist makes the overall fitted when halting and squatting with straight body. When slightly bending over, the cartridge peats make an average elongation of 2.5cm for this part and a maximum elongation of 4.6cm when crouching. And all of these elongations are limited to the controlled variable. In terms of sleeve and leg openings, the new overall is designed with triangle cut piece and sealed by zip. Its function is same as the common elastic sealing in skin cover and much better in comfort. Also in limb activity limited, the new overall makes a difference in all the parts in the related experiment, which means it can provide a better motility for the users. This investigation provides a better overall which can satisfy the needs of protection, functional, fit and comfort of oil tank cleaners specially.

Construction of female’s bottoms size grading model based on neural network ensemble

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  110-0. 

Abstract ( 752 )   PDF (1225KB) ( 338 )   Save

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How to achieve fast and precise size-archiving in large numbers is a key issue to constructing the digital mass customization system of garments. Combining with sizes of the designed pivotal parts of women pants，this paper expanded the control parts of bottoms into 10 items based on the national standard; Taken female trousers as an example, after constructing simple size classification model with BP neutral network, the five control parts that have a major impact on the result of archiving could be screened through Mean Impact Value (MIV), and they were then conducted as the input layer of ensemble clothes size classification model. In the model, Height, waist circumference, hip circumference, waist height and back gore length worked as input variables of height model and waist circumference, hip circumference, thigh circumference, waist length , height were waist circumference model input variables. Then, after integrating 10 simple BP neural networks through Adaboost algorithm, it achieved the size-archiving model with high precision and strong generalization ability.

Study of skin stretching based on running sports status

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  115-0. 

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Compression garment, which have important roles to reduce sport injury and improve athletic ability, is focused on the 21st century functional sportswear. As a research direction of skin stretching under running status, a new method for the study of human dynamic skin stretching is proposed. By analyzing the running cycle of action and Lower limb angle, running cycle will be broken down into three static action—running stride, fall, backswing. This paper focuses on studying both transversal and longitudinal extension differences when human is running, through the use of the VITUS SMART three-dimensional scanning system. Thereby, data of lower limb skin extension under different postures have been collected and preliminarily find out the regularity of skin changes during running, and that also provides the theoretical basis for optimize structural design of sports tight pants.

Comparative analysis of paper-cut design and stencil design of blueprint colth 

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  120-0. 

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Traditional blue printed cloth and paper-cut are treasures of folk art in our country and have a long history. According to the comparison analysis of the Traditional blue printed cloth in Nantong and paper-cut in Jiaodong ,I found that some of the similarities and differences among the use of tools, the pattern ,conception, composition and modeling .The biggest differences are on the techniques. The printing plate of Nantong is composed by the unconnected boorish pattern which including point, short string and face.Jiaodong paper-cut is composed exquisitely by the strings which look like a net. The results of the comparative analysis could offer a broader space for the two ancient folk arts’ innovation development and modern design ,and let more people to understand the two kinds of folk arts and put them in better inheritance and development.

Fuzzy PID control design of electronic yarn let-off system on knitting machine

Fenglin XIA ZHANG Qi

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  127-0. 

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Abstract In view of the electronic yarn let-off system response lag and obvious stripe when high-speed switching on warp knitting , A kind of fuzzy PID algorithm for electronic yarn let-off system had been developed by combined fuzzy control and common PID control, the fuzzy PID technology is introduced to revise the warp beam motor running speed real-time ,and the PID parameters of yarn let-off system were adjusted online. Therefore, the system dynamic performance is greatly improved. By use of MTLAB, PID control and fuzzy PID control are simulated ,by the contrast and analysis of the outcomes of simulations, that the fuzzy PID control could effectively raise the response speed of warp beam motor, reduce overshoot and steady-state errors, and have powerful ability of restraining external disturbance ,optimize the overall performance of the electronic yarn let-off system.

Measuring method of yarn diameter and hairiness based on linear array

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  132-0. 

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Based on linear array technology for measuring diameter, use the method of measuring yarn diameter with linear CCD laser sensor and estimating hairiness, to propose algorithm of filtering process on recursive averaging for Line Profile signal of yarn diameter and linear interpolation on acquiring the diameter pixel coordinates. This article also plotted a contactless real-time measuring system and experiment scheme. Verified the algorithm of recursion average filtering by the experimental simulation, and analyzed the influence of diameter pixels with different fluctuation threshold and the variation of sub segments hairiness and diameter. The results confirm the validity of the algorithm of obtaining the yarn diameter, the feasibility of the measurement system and the good reproducibility of the test results. And the system can accurately measure the yarn diameter and estimate hairiness, The data now can be analysed automatically on real-time, thus this article provide certain theoretical reference and experiment data for the textile process parameters monitoring.

Dynamic measurement model of contact tension sensor for yarn

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  138-0. 

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Accurate measurement and effective control of the yarn tension which changes rapidly are important factors in textile manufacturing process. Hall-type Contact tension sensor detects the cantilever’s deflection induced by the tension of yarn. The error of the sensor increases due to the vibration of cantilever under quicker yarn tension variation. This paper established a mathematical model for the contact tension sensor based on dynamics principle. A numerical algorithm to restrain errors caused by vibration from sensor’s signal was developed according to the mathematical model. Then a test bench which includes a microprocessor and a high Accuracy A/D convert module was set for verifying the effect of the algorithm. The results show that error suppression algorithm based the dynamic model on can eliminate error of vibration caused by the rapid changes in tension effectively. This paper provides theoretical references for application of contact tension senor under dynamic conditions.

Test method for shielding effectiveness of clothing fabrics by shield box method

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  143-0. 

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Based on shielding theory of electromagnetic wave, a new device -shield box- was designed to test electromagnetic shielding effectiveness of polyamide 6 (PA6) fabric treated on the surface by electroless silver plating. The results indicated that the distance between emitter and person could be simulated by the distance between the transmitting antenna and shielding material; the fabric shielding effectiveness increased with the increased rate of mass gain at the beginning, then did not change any more when the rate continuously increased, which meant that test data can directly showed the change of fabric performance. Shielding box meathod with good testing repeatability was cost saving and effective to evaluate fabric shielding effectiveness.

Fabric seam detection based on image processing in calendaring process

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  147-0. 

Abstract ( 766 )   PDF (1026KB) ( 338 )   Save

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To realize the fabric seam in calendaring process, a detection method is proposed to recognize the seam of image based on digital image processing. Taking down-proof fabric in calendaring process as example, the down-proof fabric images are processed into gray image and filtered with a median kernel firstly; and then the mean value, standard value and coefficient of variation (CV value) are extracted as the feature parameters; by comparing and analyzing the three feature parameters, CV value can be used to recognize the seam of fabric image at last. The experimental results show that the CV value is better suited to recognize the fabric seam which has a small amount of calculation with a high detection rate.

Research on 2-D image-based non-contact anthropometric technology

LUO shunhua

JOURNAL OF TEXTILE RESEARCH. 2013, 34(8):  151-0. 

Abstract ( 858 )   PDF (1241KB) ( 517 )   Save

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Anthropometry is an important component element of fashion design, pattern research and clothing production. Anthropometric technology has gone through from contact to non-contact and from manual anthropometry to 2D image and 3D anthropometry. The thesis separates 2D image-based non-contact Anthropometry into three steps: image silhouette extracting and characteristic body measurement, girth calculation, analysis of error and accuracy, and analyses the methods of every step. The trait of the anthropometry operating simply helps it applying to apparel e-commerce---clothing MTM online.