涡流纺粘胶纱用梳理针布优选实践

为了提高涡流纺粘胶纱成纱质量,介绍涡流纺粘胶纱特点及其梳理用针布选配原则;简述涡流纺粘胶纱梳理工艺流程及VORTEX 870型涡流纺纱机主要工艺参数;对比分析了VORTEX 870型涡流纺机纺R 19.5 tex～R 9.8 tex品种时,梳棉机使用不同型号针布的出条速度、切疵和效率,并对针布进行优选。指出:选用适度齿密的直齿锡林针布,配套MCH45型、MCH52(78°)型横向加密弹性盖板针布、直齿横纹道夫针布,薄齿大齿距刺辊针布和矮浅、加密固定齿条盖板针布,能够提高涡流纺粘胶纱梳理效率,改善涡流纺粘胶纱质量。     

梳棉双齿锡林针布的使用实践

探讨梳棉双齿锡林针布的工艺效果和使用实践。介绍了双齿锡林针布的分梳机理及性能特点,在DK760型和C51型两种梳棉机上进行了实际使用,就针布使用时间、出条速度等方面与常规新型针布做了对比试验;对使用双齿锡林针布后的有关梳棉工艺选择、盖板针布配套以及双齿锡林针布管理工作等进行了探讨。实践表明:双齿锡林针布在降低生条棉结杂质、成纱十万米纱疵,提高成纱条干、成纱强力等质量指标方面效果较为理想。认为:选用双齿锡林针布,并相应做好梳棉工艺优化及盖板针布配套工作,可有效提高生条质量和成纱品质。     

从梳棉机锡林针布的优选看主梳理区齿密比对JC7.3tex纺纱质量的影响

针对高支纯棉品种，从梳理效果入手，探讨锡林针布与盖板针布的齿密比、锡林针布的纵横向齿密比值，以期对改善成纱的毛羽、细节、粗节和棉结，对老机改造、高效工艺有所借鉴。     

新型梳棉针布的选型实践

为了提高纺J 5.83 tex纱和R9.8 tex纱的梳棉质量,分析两种纱线的原料性能、纺纱质量要求及生产难点,确定梳理用针布的选型原则,并对不同纺纯棉、化纤针布型号做了半成品质量试验。通过对比分析,表明应根据纤维性能、纺纱质量要求合理配置针布;纺J 5.83 tex纱应选择浅齿、大工作角、齿密大的锡林针布齿条;纺纯粘胶纤维应比纺化纤针布总高小、工作角大;针布选型时,应重视配套工艺参数并保持针布状态良好。     

FA227A型梳棉机针布使用创新

为降低成本,解决纺纱厂因梳棉机台少、纺纱品种多、针布不能及时更换的问题,经调整盖板针布、锡林针布、刺辊针布速度,用纺棉针布纺棉型化纤,并对比用此方法生产CJ/TSM 50/50 11.7 KSJ、纯博拉莫代尔Blm 11.8 KSJ和CJ/TSM 50/50 18.24 KSJ三个棉型化纤品种的成纱质量;详细分析纺化纤的针布不能用来纺棉的原因。指出：纺棉盖板针布随着使用周期延长,工作角变大,直齿型锡林金属针布齿条包卷在锡林滚筒上,工作角也会变大,增加了针布的释放性,可缓解纺化纤时产生的静电,故纺棉针布可用来纺制棉型化纤品种,且成纱质量较好;纺化纤的针布工作角较大,故不能用于纺棉品种。     

梳棉机用双齿型锡林金属针布的实践

为了进一步提升梳棉机梳理质量和梳理效率,介绍梳棉机用双齿型锡林金属针布在处理含杂高、轧工质量差、疵点多的原料时的优势,并对比分析梳棉机用单齿型、双齿型锡林针布在梳理机采棉、粘胶纤维以及色纺纤维时的棉条质量、成纱质量,表明双齿型针布随着梳棉机输出速度的提高,棉条质量、成纱质量都有所提高,为未来梳理器材、梳理模式、梳理工艺的变化发展奠定了新的基础。指出:梳棉机用双齿型锡林金属针布有利于提高梳棉机锡林与盖板对纤维的梳理、握持和转移,加强对纤维首尾端的握持,提高了盖板针布对短绒、杂质、未成熟纤维的清除效率,更适应高速、高产的需要;未来其应用将会被拓展到多种化学纤维、色纺、混纺等更广阔的领域,适应多种纤维和超细纤维梳理的要求,重点解决杂质类带纤维籽屑疵点对棉纱、面料风格的影响。     

纺细特化纤用四配套针布探讨

为了提高纺细特纤维的生条及成纱质量,介绍了金轮公司研发的纺细特纤维的四配套针布,并与通用型纺化纤针布的4因子进行水平正交对比试验,表明除MCZH35盖板针布针密过高、强度不足且易嵌花外,应用锡林、道夫、刺辊针布均能改善生条和成纱质量,可供纺细特化纤的企业选用。     

色纺纱关键纺纱器材的选用分析

探讨色纺纱生产特性,分析胶辊、针布对色纺纱成纱质量的影响,通过对环锭纺细纱胶辊、梳棉机针布选型试纺,根据成纱质量对比结果决定器材的选用。结果表明:聚氨酯胶辊具有极其优良的弹性,较佳的耐磨性和抗粘附功能,满足色纺纱多品种、少批量、高品质的要求,能有效改善色纤维可纺性,提高成纱条干水平;使用基厚较薄和双曲面锡林针布,可提高锡林表面的纤维从锡林到道夫间的转移能力,避免过度梳理和减少梳理对纤维的损伤,有利于提高成纱强力和条干水平,横向齿密加大,可增强对纤维的分梳效果,降低成纱棉结、色结,特别是明显色结。     

梳棉机用双齿型锡林金属针布使用实践

为了探究梳棉机用双齿型锡林金属针布的使用效果,详细介绍其分梳机理及性能特点,对比分析不同纺纱品种在不同梳棉机、不同针布配置、不同工艺参数等条件下的双齿型与单齿型针布所纺生条质量和成纱质量;优化梳棉机工艺参数、优选与双齿型针布相配套的弹性盖板针布;探讨双齿型针布的使用管理及维修保养的方法。指出:双齿型针布能降低生条棉结杂质、短绒率、成纱10万m纱疵,提高成纱条干水平和强力;在原棉品级较低、含杂较高情况下,其成纱质量和稳定性较好;在质量要求不变时车速可提高约20%;纺织企业要探索双齿型针布的管理方法,优选配套针布,使之更好地发挥分梳作用。     

梳棉机针布参数的相关分析

应用多元回归方法对国外七家公司的梳棉机锡林针布齿条参数和国内锡林针布齿条参数的数据进行了回归分析，得出国外梳棉机梳棉高、中、低产锡林针布的齿密与前角、纵向齿距、纵／横齿密比之间的回归方程和国内梳棉机锡林针布齿条参数的回归方程。这些方程可作为针布制造厂在设计针布时的参考，也可为梳棉机针布参数理论的研究提供依据。     

库思玛纤维/精梳棉赛络纺针织纱的开发

库思玛纤维是一种十字型截面、具有吸湿快干功能的涤纶纤维,用其制成的面料穿着挺刮,高雅华丽,色彩鲜艳,还具有吸湿快干的特点,被广泛应用于运动服装.但其质量比电阻大,易起静电,生产难度高,在开清棉前需进行特殊预处理;与精梳细绒棉混纺时采用条混工艺,严格控制混纺比;赛络纺产品在细纱工序要注意牵伸通道的两根须条必须平行,保证库思玛纤维与精梳细绒棉混纺针织纱质量的稳定.     

低配棉纺制JC 14.5 tex纱的实践

介绍了利用配棉等级2．5级细绒棉纺Jc14．5tex纱的实践,为降低强力cy,稳定提高强力,保证成纱质量,优化了工艺参数。开清工序适当降低打手速度,硫棉工序合理选用针布,精梳工序适当增加落棉,并粗工序合理牵伸分配,优化配置卷绕机构和牵伸机构专件器材。通过优化工艺、选配器材和加强生产管理,JC14．5tex纱强力CV、平均强力均稳定提高。     

Impacts of yarn twist and staple length on UV protection of plain-knitted cotton fabrics

Yarn construction is an important attribute in knitting and end use performance of knitwear. Holistically, yarn construction affects fabric thickness and weight, and thereby influences ultraviolet (UV) protection of fabrics. Although impact of yarn construction on UV protection of fabrics is apparent, there appears to be limited research on it. This paper studied the UV protection of plain-knitted fabrics made of three types of ring-spun cotton yarns varying in yarn twist level and staple length. The results show that these yarn properties affect UV protection of fabrics differently before and after laundering. The modified low-twisted yarn possesses a bulky feature which creates a porous fabric structure for more ultraviolet radiation (UVR) transmission. The extra-long staple yarn offers uniform fabric appearance for higher UVR reflection. However, the regularity of yarn also restricts the fabric shrinkage in laundering and thus improvement in UV protection by shrinkage is not as obvious as that provided by the conventional short-staple yarn.     

利用废弃聚酯生产棉型涤纶短纤维工艺探讨

文章介绍利用废弃聚酯生产棉型涤纶短纤维的可行性,生产设备工艺流程,工艺参数选择与效果分析.     

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).     

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。     

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。     

麻棉涤竹节弹力牛仔布的设计与工艺

文章介绍了麻棉涤纶竹节弹力牛仔布的设计理念和风格特征,并就该品种的工艺设计及生产实践要点等进行了详细阐述。     

棉纱条干不匀的检测分析和应用

阐述了棉纱条干用表观粗细和物理质量表达的不同涵义及两者的关系,介绍了分析条干不匀常用的检测方法、仪器和发展趋势。叙述了电容式和光电式条干仪的特点和特性,在线检测的长处及发展方向,指出条干不匀必须按产品分析要求的CV值结合波谱图、曲线图、DR值等指标组合分析,认为条干优劣应有客观的考核标准和评定依据。     

A Study on Wicking in Natural Staple Yarns

In this study, natural staple yarns of cotton and wool were investigated for wicking properties. Fibre packing density reflected by yarn wicking rates was measured in ply cotton yarns. It was seen that with the samples measured in this work, both twist level and number of ply in a yarn can affect yarn wicking behavior. When twist and yarn count remained unchanged, wool yarns with different fibre diameters were measured for wicking rates and the best wicking was found on the yarn with the coarsest fibre diameter. Comparison was made in this work on the treatment methods, and on both synthetic continuous filament yarns and the natural staple yarns. While prewash treatment could improve yarn wicking by changing fibre surface condition, plasma treatment was a more effective way in increasing yarn wicking rate for both filament yarns and staple yarns.