Table of Content

15 June 2013, Volume 34 Issue 6

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Effect of oxygen plasma pre-treatment on electroconductive property of UHMWPE/PANI composite fibers

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  1-7. 

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UHMWPE/PANI composite fibers were prepared by in-situ polymerization in this paper. In order to improve the electrical conducting property of composite fibers, UHMWPE fibers were pretreated by oxygen plasma. The relationships between electrical conducting property of composite fibers and plasma conditions(i.e. exposure time, discharge power and oxygen pressure) were analyzed, and the influence of plasma treatment on the surface morphology of the fibers after treatment was investigated by scanning electron microscope(SEM). The results indicated that oxygen plasma treatment improved the electrical conductivity of the composite fibers due to the increased surface roughness and surface energy of UHMWPE fibers after plasma treatment. The electrical conductivity of the composite fibers reached to 0.18S/cm with the base fibers treated by oxygen plasma in discharge power of 90W, and oxygen pressure of 40Pa for 2min. The electrical conductivity of composite fibers increased firstly and then decreased with the increase of exposure time, discharge power and oxygen pressure of oxygen plasma.

Rheological property of cellulose diacetate spinning dope

YU QIN

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  8-12. 

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In order to study on the molding process of cellulose diacetate fibers, we used Physica MCR101 rheoviscometer to investigate the relationship between concentrations and temperatures of spinning dope and shear rates, and thus the flowing curves of spinning dope were acquired. The rheological parameters including non-newtonian index, structural viscosity and flow activation energy were obtained by simulative analysis from the curves. The results demonstrated that the spinning dope of cellulose diacetate was a typical non-newtonian fluid. The apparent viscosity and structure viscosity index decreased, and non-newtonian index increased while elevating the dope temperatures. And as the dope concentrations increased, the apparent viscosity and structure viscosity index increased, non-newtonian index and flow activation energy reduced.

Rheological properties during capillary extrusion of linear low density polyethylene

FENG SONG

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  13-15. 

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A series of studies on the rheological behavior of LDPE melt were carried on, so as to provide the optimal spinning parameters to prepare the LDPE fiber. The study used RHEOGRAPH 25 75 of by GOETTFERT company of the Germany. The influences of shear rate，shear stress and temperature on the flow properties of LDPE pipe were investigated by using capillary rheometer at different temperature． The research result is that: the melt shear flow obeyed roughly the power law; the dependence of the melt apparent shear viscosity on the temperature corresponded approximately with the Arrhenius equation; The non-Newton exponent of LDPE is 0.498 when extrusionspinning is carried out at the temperature of 205 oC , which is most close to the Newton liquid . The activation energy of LDPE is between 10 and 13 J/P mol, when spinning performed at 150~250 oC , which decreases with the increasing of the shear rate. the melt apparent shear viscosity of LDPE pipes decreased nonlinearly with the increase of shear rate and shear stress?.

 Identification of wool and cashmere based on decision tree algorithm

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  16-20. 

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The identification of wool and cashmere is not only a difficult point in the fields of fiber detection but also the research mainly based on traditional statistical methods. So the classification research of wool and cashmere was made from the perspective of data mining here for the first time. By using multiple indicators on a single fiber as the characteristic attributes for the classification research, the fiber classification was explored from a new perspective. And the classification research was done between sheep wool and cashmere by using four main algorithms among the classical decision tree. And the relative mathematical modeling and evaluation was also completed. Experimental results show that the average relative error of built models is less than 6%. Through comparison, the C5.0 algorithm is more accurate and stable than other algorithms, and it can be used for practical classification and detection of wool and cashmere.

Preparation of absorbent CMC gauze and analysis of its absorbent kinetics

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  21-25. 

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The ability of absorbing liquid can be improved greatly as introducing carboxymethyl group into fiber structure. Carboxymethyl cellulose (CMC) hydrophilic gauze of different substitution degrees (DS) were prepared by controlling the amount of chloroactic acid (MCA). The moisture absorption capacity and kinetic of sample with different DS were analyzed. The results indicated that the optimized product had a large degree of substitution (DS) of 43.10% as nMCA: nAGU=2:1.The moisture absorption capacity of samples increased while DS values increased. Moisture absorption rate and the equilibrium adsorption amount of samples with DS 43.10% at RH=81% were 18% and 182.39 mg/g , respectively. Kinetic analysis of absorption showed that the second-order model of adsorption kinetic equation could characterize the absorption process well, as the relation coefficient was higher than 0.999. The calculated values of equilibrium moisture content agree well with the experimental values.

Processing technology of Apocynum venetum stalk viscose fiber

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  26-29. 

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In order to make full use of wild resource apocynum venetum stalk, it made dissolved the stalk into pulp to produce the viscose fiber. Using apocynum venetum stalk as raw material from Aletai,Xinjiang, the pulping of apocynum venetum stalk was made by the method of kraft. The viscose fiber was made of pulp by dissolving, alkalizing, etiolating, curing and other processes. By testing property of lop pulp and regenerated fiber, pulp was up to first-class standard of FZ/T 51001-2009 《pulp board for viscose fiber》,the fiber up to first-class of GB/T 14463-2008 《viscose staple fiber》. The optimization of spinning process was been further optimized, by industrial pilot operation, industrial manufacture could be implemented.

Effect of back zone draft on physical properties of segment colored cotton yarn with constant linear density

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  30-33. 

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Segment color yarn is a kind of fancy yarn which color segmentation regularly change in Yarn length direction. The main production processes produce slubby yarn effect. So these processes can not achieve mass promotion. In this paper, draft system of ring spinning machine was improved to produce equal linear density segment color cotton yarn. The effect of segment time and two component ratio on physical properties of equal linear density segment color yarn is investigated. Results indicate that high performance equal linear density segment color yarn can be produced by proper control of back zone draft processes. Improvement projects are also been supplied. The results provide reference for industrial production.

Experiment research of vortex tube’s jet orifice technology in jet vortex spinning

Yu Chongwen

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  34-39. 

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It is well known that jet vortex yarn is formed by high speed air vortex in vortex tube to entangle the fibers. In order to study the influence of the vortex tube’s jet orifice parameters on the spinning, the vortex tube’s jet orifice parameters (jet orifice diameter, jet orifice obliquity, jet orifice number) were discussed. The two jet orifice diameters (0.5 mm, 0.6 mm) were chosen, seven jet orifice obliquities (30.0°, 32.5°, 35.0°, 37.5°, 40.0°, 45.0°, 50.0°), three jet orifice numbers (4, 5, 6) were selected based on the two diameters, with viscose as raw material for spinning experiments in small sample machine of jet vortex spinning, experimental results indicate that: the quality of the yarn is good and the energy consumption is small under the condition of jet orifice obliquity is 45.0°, jet orifice diameter is 0.5mm, jet orifice number is 4.

 Inverse problem of thickness design for bilayer textile materials combined with particle swarm algorithm

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  40-45. 

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This paper deals with an inverse problem of estimating bilayer textile fabrics thickness based on a one-dimensional steady-state heat and moisture transfer model. We first present a model of heat and moisture transfer for bilayer textile materials, which are two ordinary equations of temperature and humidity. We transform them into two two-point initial and boundary values problems by decoupling and solve them by finite difference method. According to the requirement of thermal and moisture comfort of clothing, we formulate this inverse heat and moisture transfer problem that estimate the thickness of inner fabric as an optimization problem with least square solution. Furthermore, we use particle swarm algorithm to solve this inverse problem. Numerical experiments show that our inverse problem is quiet acceptable, and the proposed numerical method is validity and robust.

Analyzing properties of insulating layer of spunlaced nonwovens of aramid and polysulfonamide fiber at different blended ratios

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JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  46-50. 

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The thermal insulation layer is one of the most important to firefighter uniform, and its performance directly affect the effects of flame burning. In order to better develop the insulating layer spunlaced nonwovens of light thin type, high temperature and flame resistant, which is used in the retardant fire protective clothing. This paper analyzes the thermostability and flame retardant performance, mechanics performance, air permeability, bending length ,moisture regain and washing performance of spunlaced nonwovens mixed with aramid1313, aramid1414 and polysulfonamide fiber at different blended ratio. The results show that: polysulfonamide spunlaced nonwovens has poor strength. And with the increasing content of polysulfonamide, the flame retardant performance of the nonwoven is better. Meanwhile, after being dealt with the high temperature, the appearance color of the nonwoven has a little change, and the stability of dimension is better. With the rising of temperature, fabric vertical and horizontal breaking strength shows the increasing tendency generally. And the breaking elongation decreases firstly and then increases, but the general trend declines in shock. Analyse comprehensive performances of all fabric, the third fabric is the optimum matching craft.

Production and performance of chitosan / viscose spun-laced nonwoven

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  51-57. 

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To develop a new generation of antibacterial hygiene materials, chitosan and viscose fiber mixture be produced kinds of new spunlace nonwovens. Then it compares the mechanical properties, soft, absorbent, brathable and the antibacterial properties of different weight and different proportions of chitosan / viscose spunlace nonwoven . It shows that the chitosan / viscose spunlaced nonwoven has a good biomedical performance, and its breaking strength increased with the increase of areal density, while flexibility, water permeability have downward trend; at same time, the spunlace nonwoven which has more chitosan fiber has more softness, better water permeability and a more significant inhibitory effect, but the strength has declined.

Properties and new product developement of automobile air filter filtration material

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  58-66. 

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This paper is mainly regarding to the structure and performance changes of automobile air filter and its two different stage of filtration material before filtration and after filtration. The purpose of experiment is to research the influence of impurity particles on filtration property. Firstly collected a group of same automobile air filter from market and taken off the filtration material, then adopted SEM、FT-IR、DTA and TG to analyze the internal structure, respectively. Meanwhile, other instruments were applied to characterize the performance change of this two different filtration material, for instance, the weight, thickness, air permeability, breaking strength and elongation, average pore diameter, maximum pore diameter, filtration accuracy and the changes of flow and pressure drop. The results show that there is an obvious difference between structure and performance of the new filtration material and second-hand material. The deposition of impurity particles on internal pore space surface pore space of filtration material has an important influence on internal structure, physical property and filtration property. And base on these results, we developed the new filtration materials and to make a deep comparison of filtration properties among them.

Printing of polyester cotton fabrics by one paste of disperse and reactive dyes

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  67-72. 

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Printing process in one paste with disperse dye and reactive dye on the polyester/cotton blend fabrics was investigated. The main factors, including drying temperature, baking time and temperature, urea and alkali consumption, were analyzed, and the optimum technology was determined. Mixed alkali washing, the Peregal O and anti-staining agents used may very well prevent background contamination. By testing the fastness and background contamination situation of the T/C fabric, the experimental process can meet the requirements of production.

Preparation and controlled release effect of soybean protein/multicarboxylic acids modified cotton fabric

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  73-78. 

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Abstract: For exploiting the ecological multifunctional cotton fabric, the citric acid, maleic acid and soybean protein were used to treat the cotton fabric so that the chemical bonding between soybean protein and cotton fabric was formed through the bridging function of multicarboxylic acids. Effects of treating conditions on the weight gain of cotton fabric were analyzed and the optimized process parameters were also obtained. The characterization of infrared spectra and X-ray photoelectron spectrometry showed that the esterification crosslinking between multicarboxylic acids and macromolecules of cotton fiber according to ring-anhydride mechanism, while the soybean protein was combined on cotton fabric with the amido bond by the bridging function of multicarboxylic acids. The breaking strength of soybean protein modified cotton fabric slightly decreased, whereas the anti-ultraviolet property of modified cotton fabric after cactus extract treatment improved remarkably. Furthermore, the experiment of controlled release drugs suggested that the efficacy for controlled release cactus extract of soybean protein modified cotton fabric as a drug carrier was good.

Shrink-proofing finish of cashmere fibers using potassium permanganate

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  79-82. 

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In this paper, potassium permanganate was used for oxidizing shrink-proofing of cashmere fiber. The effect of oxidizing factors on cashmere fibers felting volume and fiber strength was analyzed through orthogonal experimental. Through intuitive analysis, variance analysis and F test, experimental results showed that potassium permanganate content was main factor influencing cashmere felting volume and fiber strength. When temperature was 50℃, time 20min, potassium permanganate content was 3%, and pH=3, the fibers felting volume of oxidized cashmere was almost two times as big as that of original cashmere fibers, and tensile breaking strength of single oxidized cashmere fiber was almost as big as that of single original cashmere fiber.

Experimental study of grating phase-shifting profilometry for body measurement

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  83-87. 

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This study was based on grating phase-shifting algorithm, a low-cost body measurement experiment system was constructed by digital projector and digital camera. The parallel axis system which can avoid the nonlinear error caused by general crossed- axes system were adapted with projector axis shift and camera local area shooting techniques to expand the effective measurement area, simultaneously the detailed description of the calibration of the system as well as the design principle of the projection grating were given. The four-phase algorithm experiment was carried out for measuring a dummy in this paper, The obtained fringe images were processed and calculated, and unwrapping phases was conducted by a second difference region-growing anti-noise algorithm to avoid the noise, finally, the virtual dummy has been constructed by splicing the front and back cloud data.

Relationship between shape of A-line skirt and properties of fabric

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  88-92. 

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In order to find out the quantitative relationship between the shape of A-line skirt and the fabric properties, fifteen common fabrics were chosen to test the physical and mechanical properties and made into the A-line skirts with the same pattern. Then digital camera was used to take photos of the skirt from different angles, and the photos were processed with Photoshop to get their different pixel areas, parameters of the skirt width, skirt thickness and flare number. Finally, the data were processed with correlation analysis and regression analysis. The result indicated: bending rigidity, extensibility, fabric density and drapability show significant impact on the objective evaluation parameters of A-line skirt. The fabric density has positive correlation with skirt thickness and area of side panel, and the weft bending rigidity has positive correlation with the area of front side panel and back side panel. The A-line skirts made of lower weft extensibility tend to show the A-line silhouette more obviously, and those made of stiff fabric with high drapability have less skirt flares.

Western elements in molding of modern modified cheongsam

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  93-97. 

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This paper takes Shanghai textile museum and jiangnan university's ChuanXiGuan Chinese dress as the research object, discussed the basic shape of the modern Chinese dress , and then by the modern Chinese dress modelling structure and detail breakdown structure for "basic" and "modern" type.And through the collection "fashionable" type improved the basic form, structure qipao modelling and detail design analysis, and points out that the modern Chinese dress is improved to western foreign clothing modelling method results. Specific it is through the western provinces, division, modelling such as cut sleeve method, has realized the outer profile on modelling from the traditional "A" to "H" type again to western-style "X" type of change. By the use of the shoulder pads, zipper, western-style clothing accessories, conspicuous clothing three-dimensional effect, finally finish from the body to tighten body, from the plane of the surface to change,show the modern chinese dress is the product of chinese and western culture collision and fusion.

Influence of sewing needle on fiber projecting-out srsistance of winter woolen garment

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  98-101. 

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There are some wool fibers drilling out of the winter coat filled with wool during wearing process. The more obvious one is coming from sewing needles, and the capability of beauty and wearing are debased. The fabrics-testing method for anti-penetration capability of feather and down ( GB / T12705—2009) was referred, and the tested parameter was adjusted. simulating all kinds of extrusion, knead, collision force of the wool winter coat during wearing process, the quantities of wool fibers drilling out were counted, and the disciplinarian distributing of wool fibers drilling out based on different fabric density and sewing needles were analyzed .The result shows that using smaller and round shape sewing needle is an effective way to reduce the quantities of wool fibers drilling out. This technique method can be used in the manufacture practice and advance the anti-penetration capability of winter coat filled with wool.

Primary of yarn hairiness based on digital image processing

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  102-106. 

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In order to detect the length and root number of yarn hairiness more accurately, based on the combination with video microscope and image processing technology, a novel hairiness detection method was proposed. The yarn images that captured with a MOTIC SME-140 video microscope were processed with grayscale conversion, image segmentation, morphology opening and image thinning sequentially in order to generate both the images of yarn core and thinned hairiness. Then considering the yarn core edge as the measurement baseline to judge the hairiness cut-point, hairiness root numbers of different lengths were finally obtained. The detection result of hairiness root number in each piece shows a significant stability, and is close to the result of visual counting. Therefore, the proposed approach of hairiness detection in this study is more accurate and reliable than the traditional photoelectric method.

Empirical analysis of effect of environmental regulation on export of China’s textile and garment

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  107-112. 

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Along with the hot issue of “low-carbon economy” and “green economy”, the discussion of trade and environmental protection issues aroused the concern in the international scope. As the government's social intervention, the impact of environmental regulation on industrial economy and trade is an important and worthy discussion issue. In this paper, we will take textile and garment industry as an example to explore the impact of domestic environmental regulation on their trade. Build the strength index system of environmental regulation, on the theoretical basis of the role mechanism analysis on environmental regulation and trade, we use the econometric models to investigate the impact of environmental regulation on textile and garment export trade. Studies suggest that impact of environmental regulation on textile and garment export trade is the negative effect currently. In view of this situation, policy makers and policy executor need to work together to forward to the positive role of the environmental regulation.

Research progress of textile carbon footprint

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  113-119. 

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As an important method in accounting and assessing the greenhouse gases emissions that caused by the manufacture of products, the research and demonstrate on carbon footprint have gained many attentions. Based on the introduction of the carbon footprint concept, this paper reviewed the research results of textiles’ carbon footprints. Key problems, such as boundary, carbon emissions coefficients, dividing principle and quality criterions, in accounting and assessing of textiles’ carbon footprints were discussed and investigated. In view of the superiority on industrial production of textiles in China’s textile industry, suggestions on industrial carbon footprint research were given for the further promotion of textiles’ carbon footprints accounting and assessing.

 Spinning principle, structure and properties of low torque ring spun yarns

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  120-125. 

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This paper reviews the spinning principle of low torque ring spinning technology by studying the modified spinning triangle and yarn twist and tension in the modified spinning zone. Furthermore, the 3D fiber configuration in low torque ring yarns and conventional ring yarns was analyzed using the tracer fiber technique. The results revealed the unique features of fiber helixes in low torque ring yarn, such as deformed non-concentric helix and local reversion phenomena. Those features experimentally offer useful explanations for the improved properties of low twist ring yarns and resultant fabrics. A systematical comparison was then made between low torque ring spun yarns and conventional yarns and their resultant fabrics, which show that low torque ring yarns have high yarn strength at low twists, low residual torque and less hairiness. The resultant knitted fabrics produced by low torque ring yarns have soft handle feeling and low spirality angles after several washing cycles, while the resultant woven fabrics possess better tearing strength, tensile strength and abrasion resistance. In addition, the 5th low torque ring spinning technology shows great improvement on the properties of the finer cotton yarn.

Effect of fiber length on spinning and yarn quality

Yu Chongwen

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  126-130. 

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In order to discuss the effect of fiber length on both spinning process and quality of resultant yarn, this paper provides proper theoretical analysis combined with a series of experimental researches. The results show that the over long fiber length will impede the fiber arrangement in yarn and require long procedure of spinning, and the evenness of yarn and yarn strength decreased. On the other hand, short length of fiber is expected to affect the tenacity of yarn. Therefore, reasonable length of fiber is expected to benefit both for processing and quality of the yarn.

Current status and development trend of quality inspection technique of ring spun yarns

WANG Jun

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  131-136. 

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This paper introduces the current development status of quality detection technique on ring spinning. By analyzing the off-line detection techniques and related instruments according to the phases of raw cotton, semi-processed and yarn, and a development tendency for off-line detection towards instrumentation, automatization, high-speeding and differentiation is proposed. A discussion about the developing state of on-line quality detection is made by taking auto-leveling, foreign fiber detection and electronic clearing as examples, considering the features of full range, informationize and systematization for on-line detection will be embedded into the whole yarn-spinning procedures including ginning. The means of combining on-line and off-line detection and devising and utilizing various expert systems, will facilitate the monitor for the entire ring spinning process, raising the quality of ring yarn and stability to a new level.

Novel complete condensing spinning system with strip groove structure

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  137-141. 

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In this paper, a new kind of Hollow Roller Compact spinning system with strip groove structure-Complete condensing Spinning was presented. The structure composition of the spinning system and spun yarn qualities were introduced in detail. Finally, the spinning experiments in Complete condensing Spinning and lattice apron compact spinning systems were given, and corresponding spun yarn qualities were measured. It is shown that comparing with spun yarn in lattice apron compact spinning system, the spun yarn in Complete condensing Spinning system has a little better evenness, less hairiness above 3mm, more hairiness below 2mm, and slightly poor yarn strength. Meanwhile, the Complete condensing Spinning system has less operation and maintenance cost, and lower energy consumption. Therefore, the Complete condensing Spinning system presented in this paper will have good marketing value.

Research on condensed spinning draft system

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  142-146. 

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Based on systematic study of the convenitional drafting system with double apron flexible nips of the ring spinning machine, a condensed spinning draft system characterized by negative pressure organization, stable gripping and echelon drawing was designed and developed, and the condensed spinning drafting system mechanism and practical applicattion effect were described. When raw cotton and preparation spinning conditions were identical, experimental results revealed that the condensed spinning drafting system is remarkably superier to the ordinary ring spinning or compact spinning in yarn evenness, so it is worthy to carry out a large-scale promotion of the system.

Review of staple yarn spinning technology and analysis of its key features

JOURNAL OF TEXTILE RESEARCH. 2013, 34(6):  147-154. 

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Based on the modern staple yarn spinning principles, developments were overviewed for the methods including ring spinning, rotor spinning and vortex spinning; the factors and means promoting the staple yarn spinning development were summarized; key features restricting staple yarn spinning further development were also studied extensively. Results indicated that such factors as high efficiency, energy saving and high quality yarn production were main motivations, and process optimization, equipment improvement as well as multi-technical combination were the most common methods for staple yarn spinning development. Since reinforcing fiber control via external mechanical forces such as pneumatic jet or suction, separation, condensing and false twisting has been sufficiently applied during spinning, it is necessary for staple spinning further development and improvement to investigate and apply online fiber property improvement and material multi-functional composite spinning technologies in synergic when new technical problems and bottlenecks appear during the staple spinning development. Key Words Staple Spinning; Yarn Formation Principle; Technical Development; multi-functional composition