纱线截面面积与纱线质量参数的相关性分析

许多纺织专家都在研究如何提高纱线质量和生产速度。为提高纱线质量,要么需要高质量的原材料,要么要求生产设备的加工参数设置最为合适。而截至目前,生产设备已做出许多改进,生产商们现在都希望通过改进纺纱工艺的加工参数来提高纱线质量。因纱线线密度和捻系数对纱线截面面积有显著的影响,通过对纱线加工中纱线线密度和捻系数这两项重要参数的改变,分析了影响纱线质量的因素,并尝试比较纱线截面面积与纱线质量参数之间的相关性。     

降低纱线毛羽的研讨

毛羽数是高速无梭织机中影响织造的重要参数。过多的毛羽会影响正常上浆,织造过程因相邻毛羽粘贴缠绞,开口不清造成断头,在织物中形成三跳、吊经、纬档等织疵,影响织造效率。纱线毛羽的多少还影响产品的手感风格,布面光洁及质量。因此,毛羽与织物外观光洁、清晰、滑爽密切相关,特别是对外观要求较高的织物影响更加明显。     

基于芳纶平纹织物微观几何结构的纱线抽拔力学性能分析

为研究芳纶平纹织物纱线抽拔力学性能及各参数的影响规律,建立纱线抽拔数学模型,为后续数值模型提供理论基础.采用数字单元法模拟芳纶平纹织物织造过程,获得其微观几何模型,并计算得出纱线轮廓.在此基础上,使用ABAQUS模拟单纱抽拔过程,建立纱线厚度方向单层网格划分准则和纱线材料属性,获得横向预紧力、纱线间摩擦因数对纱线抽拔力...     

毛羽与钢领,钢丝圈型号的关系

1　概述随着纺织品向细号、高密方向发展,成纱的毛羽直接影响到织造效率及织物的风格,毛羽较多已成为我国纱线与国际上优质纱线的主要差距之一,因此减少毛羽已成为进一步提高成纱质量的关键之一。由于纱线毛羽的60%以上是在细纱机加捻过程中产生的,而细纱工序加捻是通过钢领、钢丝圈来完成的,它们对纱线的强制摩擦导致大量毛羽的形成。纱线毛羽给织造过程与布面风格带来的直接影响,对涤棉织物来讲尤为突出。布面的毛羽将使涤棉织物显示不出滑爽、光洁、清晰的布面风格,在织造过程中经向毛羽的纠缠还会使织机开口不清而产生疵点。故本文主要…     

玻璃纤维织物的自动几何建模研究

织物的组织结构与其性能有很大的关系。通过设计并织造了四种不同组织(二维方平组织、3/1斜纹组织、双层斜纹组织,以及三维角连锁组织)、不同厚度的玻璃纤维织物,并对它们的几何形态进行模拟。结果表明,根据纱线的物理结构参数和织物的实际照片创建织物几何模型可行,且模型能够反映纱线的空间结构。     

中低密度机织平纹织物中纱线压扁变化规律

摘 要 为了探讨真实描述平纹织物结构中纱线截面的几何形状,需要测量沿纱线中心线方向的压扁程度。设计并织造了经向紧度和纬向紧度分别为34.72%、43.4%、52.08%的9块中低紧度布样,用Keyence数码显微镜获得布样上经或纬组织点图片,非破坏性地实际测量组织点不同位置处纱线直径。利用Excel和Origin软件对测量数据的输入与处理、绘制测量位置与压扁系数的点线图,分析沿纱线中心线方向纱线截面的变化规律和不同紧度的织物中经纱或纬纱的压扁程度。发现纱线截面的压扁系数与组织点的中心位置距离呈现高度线性相关,距离越近,压扁程度越大;中低织物紧度条件下,紧度对纱线压扁系数影响不明显。     

纱线截面形状对经编弹力织物特性及工艺制定的影响

纱线截面形状对经编弹力织物的延伸性、回弹性和模量等特性有较大的影响。本语从理论上分析了这些影响,就实际织造工艺和后整理工艺提出了注意点。并且介绍了几种常见弹力织物受截面形状影响的情况。     

用变截面纱线模型模拟平纹织物的研究

为了逼真模拟平纹织物,采用变化尺寸大小的锯齿形椭圆截面的纱线模型,结合B样条曲面造型技术,利用Peirce机织物模型构造平纹织物的几何立体结构.根据VC程序运行结果来看,该纱线模型结合捻度结构用于模拟平纹织物的效果逼真.     

纱线截面参数测试及截面形状系数计算方法研究

基于光学测量技术,设计可快速测量纱线截面参数的试验装置。通过测试不同线密度、不同捻度的长丝束样本,分析线密度及捻度对截面参数的影响,并给出截面测试直径、截面测试面积与截面当量直径、截面当量面积,以及截面形状系数的计算方法。测试结果表明,该测试装置可测得包含结构因素在内的纱线截面参数,能为产业用纱线力学性能的预测和质量控制提供更精确的纱线截面信息。     

平纹织物纱线截面形态经典理论探析及其泛化

平纹机织物内部纱线的截面一直被业界视为某种固定的形态，但应用可视化技术发现，基于经典的双凸截面模型存在问题，即使用微积分思路解决问题过程中，发现纱线截面变化的规律。研究结果表明，无论是单层机织物还是多层机织物，其纱线截面均呈现出多元性，而非单一形态。特别是对于接结多层纬纱的经纱，其截面沿纱线长度方向按凹凸交变的规律呈周期性变化。这一研究成果对“织物纱线恒定截面论”提出了异议，对研究纱线的真实截面形态及织物外观模拟具有参考价值。     

The effect of core-sheath proportion on the characteristics of hollow yarns: part I mechanical properties

In the scope of this study, core yarns in the yarn count of 59 tex were produced by using cotton, viscose, wool, and polyester fibers in the sheath and different ratios of polyvinyl alcohol (PVA) in the core. After completion of yarn production on ring spinning frame, winding process was performed in order to get packages. These yarns in the form of packages were washed during a time period in order to remove PVA from the yarn structures to obtain hollow yarn structure. Yarn irregularity and yarn tensile tests were performed in the form of packages before and after washing process. As a result of these tests; it was observed that values of yarn unevenness and tensile tests were significantly influenced by the core-sheath proportion and washing process.     

A comparative study on properties of dual-core yarns

Core-spun yarns containing Spandex have been widely used for the production of elastic textile materials. However, it has been encountered various problems not only during the usage but also during textile processes due to its high recovery property. In order to solve these problems, multicomponent core-spun yarns called as dual-core (DC) yarns, have been developed. DC yarns can be produced on the modified ring spinning machine in two different ways. In the first method, previously combined two core yarns are fed simultaneously, whereas in the second method, two core yarns are given separately into the centre of sheath fibre bundle. In present study, it was aimed to research the effect of these production methods on yarn features. Polyester and Spandex core components and cotton wrapping fibres were brought together in both two ways and the properties of multicomponent core-spun yarns were compared with cotton ring counterparts for three different yarn counts.     

涤纶长丝纺花式线及其结构性能研究

对涤纶长丝纺制花式线进行花样设计,主要是螺旋纱、结子纱、圈圈纱,并对纺制出的花式纱线的细度、拉伸断裂强度、断裂伸长率及捻度等性能进行测试,为后期的面料设计提供了材料性能依据。     

减少纯棉精梳针织纱棉结的体会

从原棉选用、清梳联工艺调整和设备状态等方面叙述了减少棉精梳针织纱棉结的体会。使用人工采摘的棉花、保证针布锋利和隔距正确、选配合理的梳理部件速比可减少棉结的产生。     

竹节纱的检测方法

介绍了竹节纱的常用测试方法,认为电容式条干仪检测方法能对竹节作出较准确的判断,此法可加以推广。     

Effect of polyester and elastane linear density on the physical and mechanical properties of dual-core-spun cotton yarns

ABSTRACT

The use of single-core elastic spun cotton yarns is well established in textiles and denim industry but interest in the use of dual-core-spun yarns has started to grow only recently. The aim of this study was to investigate the effect of polyester and elastane linear density on the physical and mechanical properties of dual-core-spun cotton yarns. Yarn samples were prepared on industrial-scale spinning machines using cotton as the sheath fibers and two different linear densities of polyester and three different linear densities of elastane filaments in the core. Statistical analysis of the results revealed that yarn tenacity, elongation, uniformity, and hairiness are significantly affected by the linear densities of both the polyester and elastane filaments in the core, with statistically significant interaction between them. Yarn imperfections (IPI), however, are affected mainly by the polyester denier, while the elastane linear density did not show statistically significant effect on the IPI. Regression equations for different yarn properties were also developed which showed fairly high values of coefficient of determination (R-sq).     

集棉器对成纱质量影响的研究

探讨在EJM128K型环锭细纱机上集棉器对成纱质量的影响情况。本文分析了集棉器的数学模型,在EJM128K型环锭细纱机上加上不同型号的集棉器分别纺制CJ9.7tex、CJ7.3tex纱,测试纱线的毛羽、强力、条干等各项指标并进行对比分析。结果表明：集棉器对成纱强力和成纱毛羽提高较明显。     

提高棉纱质量创针织用纱名牌

介绍了近年世界棉纱质量的发展现状及趋势,指出了针织用纱的质量要求日益提高。并结合我省针织用纱的质量状况,阐述了我省创针织用纱名牌应解决的生产技术关键及措施、建议。从而进一步稳定、提高针织用纱质量,赢得市场,争创名牌。     

纯棉精梳色纺纱生产实践

叙述了纯棉精梳色纺纱生产中的原料选配、工艺优选问题，介绍了防止色差和减少棉结的措施，认为应进一步提高色纺纱的质量和档次。     

新型带子纱与睫毛纱的纺纱研究

主要介绍了应用小针筒织带机采用不同工艺开发生产一些新型花式纱线，如睫毛纱、包芯带子纱、彩色麦穗纱等，并详细介绍了纺纱工艺过程。同时指出小针筒织带机的调节方法，提出了生产新型花式纱时应注意的问题。