减少布面纱的清纱工艺和络筒机效率分析

本文就出口布的实物质量对管纱的纱疵控制要求，建立在电清清纱工艺设定下的纱疵剪切数与自动络筒机效率和布面竹节数之间的关系，并对清纱工艺进行了优化选择，对降低布面竹节纱疵、提高出口布实物质量具有显著效果。     

USTER QUANTUM 2型电子清纱器清纱参数的优化

为提高细号纱成纱质量,减少细号纱织物布面疵点,对USTER QUANTUM 2 型电子清纱器的清纱参数进行了优化.指出:相同的纱疵在不同经纬密度的织物上显现率不同,对清纱工艺的设定必须考虑织物的经纬密度和布面质量要求,同时应避免影响自动络筒机高效性能的发挥.通过优化清纱工艺参数,使筒纱10万 m纱疵控制在6个以下,生产效率保持在80%左右.     

粗节纱疵分析与控制

为了更好地控制粗节纱疵,介绍纱疵的概念与分类;从原料、工艺设计、设备状态、运转操作、环境、检测等方面分析粗节纱疵产生原因;从布面、数据对比、切割、纱体4方面探讨粗节纱疵的分析方法;强调防止突发性密集型粗节和偶发性随机型粗节、优化电清清除功能,建立纱疵样卡档案,树立无疵管理理念,建立粗节纱疵防控机制。指出:影响粗节纱疵的因素多且复杂,其控制工作应长期坚持;掌握纱疵系统控制的方法,保持纱疵在较好水平,就是保持高效率与高质量。     

优选清纱参数减少异性纤维的实践

探讨异性纤维的控制措施。阐述了异性纤维的来源和控制方法,重点介绍了络筒工序采用电子清纱器对异性纤维进行控制的方法,并对异性纤维纱疵清纱参数进行了优化。指出:运用电子清纱器的清除异性纤维功能,并对异性纤维的清纱参数进行合理设置和优化,不仅能够较好的控制产品中的异性纤维含量,而且还能在一定程度上达到提高生产效率的目的。     

T/CJ 13 tex清纱工艺参数的设定

为充分发挥电子清纱器的清疵功能,提高筒纱质量,对LOEPFE FR-700型电子清纱器的工艺参数进行了三种方案的试验对比.通过对筒纱10万m纱疵情况进行统计对比,确定了优选的工艺参数:N通道D=5倍;Short通道L=1.0 cm,D=2.4倍;Long通道L=60 cm,D=1.4倍;Line通道L=20 cm,D=-50%.指出:电子清纱器工艺参数的设定应综合考虑纱疵分级规定和后道工序的要求及生产效率来制定.     

电子清纱与纱疵分级的最新发展

介绍了国外最近推出的能清除有色异纤电子清纱器以及国内这一领域研究所取得的最新成果－－能清除外来有色及无色的异纤电子清纱器；提出了应根据清纱工艺，针织需要及细节弱环断头进行“全纱疵分级”的概念。     

电子清纱与纱疵分级技术的最新发展

本文阐述了九十年代末电子清纱与纱疵分级技术的最新发展。讨论了应按信号处理技术来划分“普及型”和“提高型”电子清纱器;介绍了国外最近推出的能清除有色异纤的电子清纱器以及国内在这一领域所研究的最新成果-能清除外来 有色和无色的异纤电子清纱器;提出了“全纱疵分级”概念,并研制完成了首台全纱疵分级仪。     

电子清纱器参数设定及布面纱疵控制

通过对纱疵分级、电子清纱器清纱参数的设定及10万m纱疵数与布面纱疵评分之间关系的研究，提出建立纱疵分级仪专家分析系统的构思，运用纱疵分级仪测出的10万m纱疵数，预测布面匹扯分质量，指导电子清纱器参数的设定，从而使布面纱疵得到控制。     

减少纱线纱疵的方法探讨

介绍了纱线纱疵产生的原因、检测方法以及在纱线中的表现形式,分析了原料性能、加工工艺条件以及设备条件对纱线纱疵的影响,提出了减少纱线纱疵的方法并介绍了控制纱疵的方法.     

偶发性粗节纱疵的形成原因及降低措施

偶发性纱疵是指成纱在生产过程中所产生的粗节、细节、双纱等长短、粗细程度较常发性纱疵严重的一种纱疵。分级仪将偶发性纱疵按照粗细、长短的不同分为２３级，其中粗节纱疵１６级，称为偶发性粗节纱疵。一般以１０万ｍ纱疵中九级有害纱疵之和Ｓ（Ａ３＋Ｂ３＋Ｃ３＋Ｄ２...     

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。     

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。     

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).     

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。