细旦丙纶针织物湿舒适性研究——常规客观试验方法测试研究

针对国内新近研制开发的细旦丙纶纤维,本文依据服装舒适性理论,运用常规客观测试方法,对细旦丙纶针织物的液态水传递能力、液态水保持能力、透气性能,放湿干燥性能进行了探讨,最后用灰色聚类判别分析法进行了综合评价。     

A STUDY OF FINE DENIER POLYPROPYLENE FIBER KNITTED FABRICS'''' WET COMFORT——THE WET COMFORT STUDIED BY THE NORMAL OBJECTIVE TEST

Based on the theory of moisture vapor permeability and liquid moisture transmission through fabric, this paper is mainly concerned with the wet comfort of the fine denier polypropylene fiber knitted fabrics. The liquid water transport property the liquid water retention property, the moisture permeability property, the moisture releasing and drying property of these fabrics are tested by normal objective ways and discussed. At last, according to these properties these fabries are classified by grey model synthetic evaluation method.     

基于倾斜矫正算法的针织物图像研究

倾斜的针织物图像在图像处理前需要对其倾斜进行矫正预处理,但由于针织物图像的特殊性,使其不能采用机织物等倾斜图像的矫正方法。针对这一难题,利用一维傅里叶变换求针织物纵密频谱和横密频谱。计算,然后根据各自频谱的峰值特性进行自动旋转倾斜矫正。给出了算法细节,同时还得到针织物的拉密度。实际研究表明,所采用的方法在针织物行业里尚属独有,运算量小,实时性高,具有很大的普适性,非常适合于在针织物的图像检测领域推广,具有广泛的实际应用价值。     

带花纹的平针针织物密度检测方法研究

在纺织工业中针织物的密度检测是必要的,而对带花纹的针织物密度检测却存在很大困难,针对这一问题,提出对带花纹的针织物的平针部分进行识别筛选后再进行计算。先将预处理后的图像进行分块,采用灰度共生矩阵分析法,求出最佳标准平针图块拉密度,根据比例可以求出整幅图的拉密度。实际研究表明,所提出的方法在针织物行业里是尚属独有的,运算量小、实时性高,具有很大的普适性,非常适合于在针织物的图像检测领域大量推广,具有广泛的实际应用价值。     

Wet Permeability and Moisture Vapor Transmission Characteristics of Soybean Knitted Fabrics

Wet permeability of fibrous assembly is mainly influenced by the properties of liquid and the configurations of the fiber which consist of diameter of fiber, twist angle and fiber alignment in a yarn. It can be seen from experimental results that the knitted fabric made of soybean (SB) fiber has good properties both in wet permeability and vapor transmission so that the knitting technology and fabric characteristics can be improved.     

Tensile Property of Bi-axial Warp Knitted Structure

The tensile property of bi-axial warp knitted fabrics is tested and compared with that of the plain weave fabric. The results show that there are obvious differences between the tensile property of a bi-axial warp knitted fabric and that of a plain weave fabric. The former can give fuller play to the property of a high modulus yarn than the latter. The tensile strength of a bi-axial warp knitted fabric is linear with the number of yarns in the direction of force.     

Web-Based Interactive Simulation of Weft Knitted Fabric

In order to realize parametric simulation of three- dimensional (3D) fabric structure based on web,a 3D model describing a plain knitted fabric,in which the cross- section of the yarn is circular shape and the path of the yarn is cubic B-spline curve,is proposed in this paper. With this model,the 3D simulation of the loop and of the basic structures of the knitted fabrc is realized by using Virtual Reality Modeling Language (VRML). The virtual simulation scene is suitable for network transmission with freely available VRML browsers and can be translated,scaled and rotated quite arbitrarily. By using Java and External Authoring Interface (EAI) technology,the web- based interactive simulation platform of weft knitted fabric is established. The user can input type of structures,basic fabric parameters,and yarn colors interactively to obtain a more realistic simulation result in real-time. A new approach is provided to imitate the knitted fabric 3D appearance on network.     

Analysis of the Thermohydro - comfort Durability for Microfil - polypropylene Knitted Fabric under Grey System

Thin microfll - polypropylene knitted fabric that is knitted to use new single plated theory on large diameter circular weft knitting machine is a new functional fabric. After military use, the reflective opinions are that it is light, thin, soft, smooth - touch, and it has excellent elasticity, good air perviousness, large water vapor permeability . In this paper, an analysis is held to use grey system theory, and the thermohydro - comfort durability of this microfil - polypropylene knitted fabric is compared with that of common knitted fabrics. The analytical result proves the microfil - polypropylene knitted fabric is satisfactory under the climatic conditions that human body needs to eliminate or retain the quantity of heat. It can be use to seam up not only physical ability training uniform of serviceman but also civil sporty and sportswear et cetera.     

超细纤维在针织面料上的应用

本文阐述了超细纤维的生产工艺、性能特点，介绍了超细纤维原料在针织服用面料上的广泛应用。利用超细纤维可制成仿真丝、仿桃皮绒及麂皮、高导湿面料等织物，风格独特，并指出发展超细纤维技术，提高针织产品开发能力存在的一些技术难点，有待进一步研究。     

大豆蛋白复合纤维针织面料舒适性能的研究

测试了大豆蛋白复合纤维针织物与棉针织物物理性能,同时对其针织内衣进行了穿着对比实验,并主观评价了两种面料的穿着舒适性能.认为大豆蛋白弹性针织物的服用舒适性能良好,其优良的接触舒适性和热湿舒适性都在一定程度上好于棉针织物,是加工贴身针织内衣的理想面料.     

双轴向经编结构拉伸特性的研究

对机织平纹及双轴向经编织物的拉伸性能进行了测试分析与比较，对双轴向经编织物的拉伸强力与受力方向上的衬经（或衬纬）纱密度的关系进行了回归分析，探讨了双轴向经编织的拉伸特性及优势。     

反应性阳离子聚氨酯对羊绒针织物起球性能的影响

以自制的反应性阳离子水性聚氨酯对纯羊绒针织物进行抗起毛起球整理,研究整理剂对纯羊绒针织物整理效果及其服用性能的影响。研究结果表明：在整理剂最佳的应用工艺下（整理剂质量浓度50g/L、浴比1：35、整理液pH5.5、40℃下处理20min、100℃烘干）,可显著提高羊绒针织物的抗起毛起球性能,其起毛起球等级从2.0级提高到4.0级,且织物的手感和白度等风格不受整理剂的影响。     

增强用罗纹针织物的性质研究

针织物增强涂层复合材料的性质与其增强用针织物的性质有着密切的关系.本文对增强用罗纹针织物的结构参数与其性质的关系进行了探讨,通过实验和分析了解了它们内在的联系,并导出了它们之间的计算式,给出了利用针织物的结构参数来控制其性质的途径.     

针织物密度在线检测算法研究

针织物的密度、线圈长度、面积孔隙率、未充满系数等组织结构参数的检测是针织物的一个重要指标。但是,目前针织物的密度参数通常是以人工手拉目测为主,严重降低了生产效率和产品质量。针对实际需求,研究开发了针织物密度算法。首先对针织物图像进行中值滤波和直方图均衡化,再根据提出的密度算法进行计算。实际研究表明,该算法运算量小、实时性高,非常适合于在针织物的图像检测领域大量推广,具有广阔的发展及应用空间。     

针织物外观平整度的小波分析与等级评定

引入二维小波分析方法,分析针织物的外观平整度,提取了较为精细的针织物图像信息.图像首先经过中值滤波,再利用小波变换分解并从中提取高频信息,然后结合4种表征织物折皱的特征参数,计算不同平整度等级模板的特征值.并以此为依据,运用最小距离判别法,确定16种不同针织物类型的平整度等级.为了定量描述评定结果,通过计算客观评定与主观评定结果的相关系数,验证该方法的可行性.     

Three-Dimension Parametric Simulation of Knitted Fabric Based on the Twisted Loop Model

To enhance the realistic simulation effect of knitted fabric, a new three-dimension （3D） twisted loop model was proposed. This model was constructed by using Non-uniform Rational B-Spline （NURBS） surface. The control points of this surface were generated through rotating the cross-section along the center path of yarn. The cross-section of yarn was generated based on the two-level hexagonal ~lose packing model. Both of the center path and the cross-section were fitted by NURBS. With this twisted loop model, 3D parametric simulation of knitted fabric was realized in 3DS MAX by utilizing MAXScript and analyzing the relationships between structure parameters （including the wale-spacing, the course-spacing, the yarn diameter, .and the fabric thickness） and geometric model. The simulation of knitted fabric has 3D realistic twist effect dearly. Furthermore, the structure parameters and the twist parameters of fabric can be modified interactively.     

基于均匀化理论的针织物拉伸形变有限元模拟

针对针织物形变规律问题,以纬平针织物为研究对象,通过均匀化理论建立宏细观线弹性数学模型,确定针织物的周期性边界条件及载荷边界条件,采用数值模拟方法对织物等效弹性刚度求解,并结合有限元方法计算两种纬平针织物在双向拉伸下的应力应变响应值。与试验数据相比,当织物拉伸的应变小于5%时,基于均匀化理论的方法可准确模拟形变的应力应变关系,而当应变超过15%时,该模拟方法存在一定误差,但误差均可控制在9.7%之内。     

STUDY ON THE METHOD FOR EFFECTIVELY QUICK DETECTING THE EVENNESS OF A KNITTED FABRIC

In this paper,the relations between the parameters of stitch structure and the needle penetra-tion force,and the method by using the needle penetration force detected to evaluate the looplength and evenness of knitted fabric indirectly are analysed and discussed.A microcomputer system with a needle sensor and author's program are used as a pick up setcombined with a data analysis system,for sampling and analysing the needle penetration forcedata.A lot of experimental research work has been done for knitted fabric of some kinds of knittedstitch and loop length.As a summary of this study,some conclusions can be drawn from the linearregression between the needle penetration force and the loop length.Then,the size and evenness ofthe loop length of knitted fabric can be indicated indirectly by detecting the value and variance ofneedle penetration force.It offers an effective method to detect and evaluate the evenness of knit-ted fabric with an efficiently high speed.     

用计算机建立棉针织物的线圈模型

介绍了目前国际上有关建立针织物线圈模型的几种观点，叙述了从生产实际中取样，利用计算机建立实用型线圈模型的方法，同时，也分析了棉针织物的平衡状态。     

Influences of Cotton Fabric Treatments on Human Physical Responses during Exercise and Recovery

We investigated the influences of liquid water transfer property of cotton fabric on human physiological responses, such as ear canal temperature, heart rate, blood pressure, stress hormone, during exercise and recovery. Long sleeves cotton knitted sportswear treated to have special liquid water transfer property were prepared; （1） Hydrophilic; （ 2 ） Hydrophobic; and （ 3 ） Moisture Management （MM）. Wearing these garments, human subjects ran on treadmill according ＂to a pre-designed experimental protocol. It was found that during exercise hydrophilic cotton caused significantly higher mean skin temperature than MM and hydrophobic cotton fabrics, while during recovery, hydrophilic and MM cotton fabrics caused significantly higher mean skin temperature than hydrophobic cotton fabric. Hydrophilic cotton fabric caused significantly lower heart rate than MM cotton fabric, lower systolic blood pressure than MM and hydrophobic cotton fabrics. Hydrophobic cotton fabric caused significantly higher urinary catecholamine volume than hydrophilic and MM cotton fabric, indicating stronger physical stress. Hydrophilic cotton fabric caused significantly stronger thermal and humidity sensations than MM and hydrophobic cotton fabrics at the end of first and second exercise sessions. Hydrophilic cotton fabric caused significantly stronger discomfort sensation than hydrophobic cotton fabric at the end of first session of exercise. In the end of wear trial, MM cotton fabric caused significantly higher tiredness sensation than hydrophilic and hydrophobic cotton fabrics.