Investigation on the Dimensional Properties of Relaxed Plain Knitted Fabrics

A geometric model of relaxed plain-nitted fabric isproposed.A method based on the model for predictingthe loop length from the course spacing,wale spacing offabric and the diameter of yarn is deduced,as well as a computer program is developed to graphically represent the structures of plain knitted fabric with various struc-tural parameters.     

丝光对棉平针织物线圈结构形态的影响

本文就烧碱浓度、浸碱时间、丝光张力和丝光前线圈长度对丝光后棉平针织物的圈高、圈距、厚度、线圈长度和线圈形态系数等线圈结构参数的影响进行了探讨。实验表明,丝光后棉平针织物线圈长度缩短,圈高变大,圈距变小,厚度变薄,线圈形态系数变小。通过分析可以定性地得出其特性的变化。     

Tensile Properties of Weft Knitted Fabric Reinforced Composites

Seven kinds of weft knitted fabrics from glass fiber yarns were used as reinforcement to make fabric/epoxy composite laminates. Tensile tests were carried out to examine and compare the mechanical properties in course and wale direction of these composites. On the basis of experimental results, attempts have been made to analyze some main factors influencing stress-strain curve, ultimate tensile strength and initial elastic modulus of specimens.     

机织针织复合结构增强复合材料的拉伸性能

经纬纱和针织纱分别使用玻璃纤维和高强涤纶编织新型机织针织复合织物作为增强体,采用真空辅助树脂传递模塑(VARTM)工艺制作聚乙烯树脂复合材料.对该新型复合材料的横向、纵向和斜向拉伸性能进行测试,并对拉伸应力-应变特征曲线及其拉伸断裂形态进行分析.研究表明:该类复合材料具有较好的拉伸性能,横向和纵向的拉伸性能均优于斜向,...     

单梳经平织物增强复合材料拉伸性能试验研究

在拉舍尔舌针经编机上编织了6种玻璃纤维单梳经平织物,采用手糊工艺将其与不饱和聚酯树脂复合.在万能材料试验机上测试了单梳经平织物增强复合材料试样的拉伸性能,并对其纵向、横向与斜向应力-应变曲线、弹性模量、断裂强度等进行了分析.结果表明,单梳经平织物增强复合材料的拉伸性能具有明显的正交各向异性特征;织物结构参数的变化,导致了线圈形态、延展线的长度和取向等的差异,使复合材料的拉伸性能不同.     

Analysis of the Porosity Changing after Moisture Absorption in Functional Knitted Fabrics

The paper analyses the effect of stitch geometricalmodality changing after moisture absorption on the porosityof knitted fabrics, and educes the formulas between porosityand stitch parameters. Regarding as the cell stitch, theincreasing of yam diameter brings the porosity decreasingand the fabric shrinking in the wale direction. While thediameter keeps invariability, the yarn elongating brings thefabric humping up as well as the increasing porosity. Theair-permeability experiments have been conducted to validatethe theoretical analysis, and there is reasonable agreementbetween the theories and experiments.     

基于几何模型的纬编提花织物结构计算机辅助设计

通过对构成纬编提花针织物的基本线圈单元进行几何结构分析,建立几何模型,开发了一套纬编提花针织物计算机辅助设计系统。利用该系统,通过输入花型信息及圈高、圈宽、纱线直径等参数,不仅能以图形方式直观地显示针织物的线圈结构形态,还能计算线圈长度等织物结构参数。     

Studies of Stability in Electrical Property and Sensitivity of Polypyrrole Conductive Fabrics Used for Intelligent Flexible Sensors

Electrically conducting fabrics used as flexible sensors can be produced by vacuumed vapor deposition. The research of what impacts the wide and reliable application of the flexible sensors shows that the stability of flexible sensors is one of the critical issues. The electrical performance of weft knitted fabrics in course and wale direction does not show significant differences underdifferent ambient conditions,which include time,temperature,and relativehumidity. Tests of stimuli responding sensitivity of conductive fabrics indicate that the sensitivity keeps at a constant level and the average sensitivity is stable over 38 days.     

双喷平绒织机气路改造实践

分析了普通喷气织机的气路系统.通过在该气路系统上加设辅助气包、加接快接插头等增引气路分支;通过三通阀和电磁阀对各气路分支的气流进行整合和通断控制使其适应双层织造的需要.应用虚拟仪器编程对有关数据进行测试分析后可知,该新气路完全适合双层织造的需要.     

信息论原理在织物手感评定中的应用

本文应用信息论原理,探索经验在织物手感评定过程中的作用,对专家组和非专家组评定的结果进行了分析。用数据说明专家组处理信息能力强,即对织物的物理机械性能的变化敏感;专家组在处理信息时引进的主观因素少,即评定的结果客观性强或较为可靠。     

亲水性疏水性织物动态热湿舒适性比较研究

以纯毛织物作为亲水性织物的代表、以纯涤纶织物作为疏水性织物的代表，利用织物动态热湿舒适性能测试仪，采用定量汗液蒸发的方法，研究了两类织物的动态热湿舒适性能，并对两者的差异进行了理论分析。研究表明：在动态条件下由于皮肤要经历干燥—出汗—蒸发—干燥、织物要经历干燥—吸湿—放湿—干燥的过程，此时，亲水性的吸湿性好的织物对汗液的蒸发起了阻碍作用，因此动态条件下使用疏水性的织物比使用亲水性的织物更趋合理。     

夏季服用织物动态热湿舒适性的影响因素研究

利用自制的织物动态热湿性能测试仪测定了不同透气性和不同原料的夏季服用织物在皮肤干燥-出汗-蒸发-干燥的过程中的皮肤热损失、微气候区温湿度变化的情况,研究了影响夏季服用织物动态热湿舒适性的因素,指出在外界风速较大或织物的透气量较大时,汗液蒸发是通过紊流扩散进行,由于汗液的快速蒸发,可能使人体产生冷感,此时不同织物的微气候区温湿度差别很小,当外界风速小或织物的透气性小时,汗液的蒸发通过分子扩散进行,此时微气候区的湿度主要受织物吸湿能力的影响,吸湿能力较强时湿度低,纯涤织物在出汗后,由于微气候区湿度较高,将使人产生闷热感,在出汗结束后降温较多可能产生冷感,不宜作为夏季服用织物,纯毛织物因吸湿放热多在出汗初期升温较高,不利于散热,夏季以穿着纯棉、涤棉、毛涤混纺织物的服装为宜.     

KNIT FABRIC SURFACE PROPERTY AND MOISTURE TRANSFER

This paper deals with the properties of the fabric such as surface compression energy, the thick,ness, surface hairness, compressional resilience and effect of these factors on the moisture transport.In the course of the present investigation, the possibility of expressing the relationship between thethickness and the pressure as a hyperbolic function is considered, and compressional resilience is al-so described by relative compression energy loss. The vapor resistance of fabric in terms of still air layer and mathematical model of vaportranspiration are elucidated and ten samples from various double knit fabrics made on the same ma-chine are tested in this study and a multivariate linear regression model is suggested. It is found thatthe thickness of fabric is the strongest factor in the mathematical model of vapor evaporation.     

论丝绺在现代服装工业制板中的重要作用

在服装工业制板过程中，正确运用不同丝绺的性能、对于提高服装成品的质量起着重要作用。本文对服装丝绺的性能进行全面研究分析，论述丝绺在服装中的重要作用及应用方法。     

Study on the Factors to Influence Dynamic Heat - moisture Comfort of Summer Clothing Fabrics

In this paper, the factors to influence the dynamic heat - moisture comfort of summer clothing fabrics have been studied. It is pointed out that, when the wind speed outside is high, or the air permeability is very good, the sweat of human body will evaporate mainly through turbulent diffusion. Because of the rapid sweat evaporation, human body will feel cold, and then, the difference in temperature and humidity of the micro - climatic section will be very slight. On the contrary, when the wind speed outside is slow or the air permeability is unsatisfactory, the sweat of human body will evaporate mainly through molecular diffusion, and in this case, the humidity of the micro - climatic section will be depended on the hygroscopicity of the fabric, that' s to say, the better the hygroscopicity, the lower the humidity. It is difficult for pure wool fabric to loss heat because of its giving out much heat during the course of moisture - absorption in the initial stages of sweating. For pure polyester fabric,     

Study on Properties of Dynamic Heat-Moisture Transfer of Summer Fabrics

The skin heat loss(heat flow)of summer fabrics duringthe course of sweating--evaporating--drying is mea-sured by an apparatus specially made for the purpose.Itis pointed out that:the dynamic heat-moisture comfortcan be described by evaporating rate or time required fordrying out of a certain amount of sweat.The evaporat-ing rate is influenced by the hygroscopic property andthickness of the fabric,the larger the hygroscopicity ofthe fabric with the same thickness,the smaller the evap-orating rate of the perspirated sweat.     

Effect Factors on Measurement Precision of the Embedded Temperature Sensing Fabric

The embedded temperature sensing fabric was designed and woven according to the heat transmission model of the fabric.The temperature sensors were embedded into the multi-layered fabric that weft yarns were high-shrinkage polyester filaments.And the fabric was treated by a self-designed partial heat device,which can make the sensor be fixed in the fabric.The effects of yarn type,yarn linear density,fabric warp density,fabric structure,fabric layer numbers where the sensor is located,and the ambient temperature on the temperature measured value were investigated.The results demonstrated that when the higher thermal conductivity of yarns and lower density yarns were applied in the fabric as rawmaterials,they were favored to improve the measurement precision.Meanwhile,there were many factors that could make the measured values closer to the real value of the body,such as the plain fabric,the increased warp density of the fabric,the multiple-layer fabric where the sensor was located,the raised ambient testing temperature and the prolonged test time in the certain range.     

织物湿传导理论与实际的研究第一报:织物的湿传导过程与结构的研究

提出了织物湿传导通道的三种型式.指出了织物中透湿孔洞有多种多层次结构,横向尺寸相差甚大,在湿传导过程中的表现和作用各不相同.提出了描述织物中各层次透湿孔洞的物理量并给出了相应的计算公式.     

机织物悬垂屈曲的数值模拟

开发虚拟服装试衣系统需模拟织物的悬垂和屈曲，而采用正交异性力学模型不适合织物．为此，笔者基于织物的细观力学模型，用有限元方法来模拟方形织物片铺在圆桌面上的悬垂和屈曲，该细观模型描述了织物由于其细观编织结构而特有的力学性质．织物片用8结点壳单元离散，这种壳单元被特别设计，能描述织物片在悬垂中发生的大转动．对织物片的屈曲模态进行了分析，对其后屈曲变形进行了计算，也进行了方形织物片的悬垂和屈曲实验．模拟结果和实验的观测结果很一致．该研究为虚拟服装试衣系统的开发奠定了基础．     

Investigation in Longitudinal Compression of Wool Based Suiting Fabrics

This paper describes an investigation in the fabric longi-tudinal compressibility of thirty-one suiting and trouse-ring materials using a newly developed device attached to the advanced Instron extensometer Model4466.The at-tachment was designed mainly to ensure a correct align-meat of fabric plane at the start of compression.Usingthe newly developed testing method,fabric longitudinalcompression curve was obtained and the results of longi-tudinal compressibility measured by two different com-pression load ranges(from 0 to 0.5 N/m width and 0 to1 N/m width)were examined.In addition,their rela-tionships with the fabric low-stress mechanical proper-ties measured by the KES-F system were investigatedusing statistical analysis.The results clearly indicatedthat significant differences existed when substituting fab-ric longitudinal compressibility with fabric extensibilitymeasured using the KES-F system under a low-load.Significant infiuence of yarn rotational movement in fab-ric on the longitudinal compressibi