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Neps not only adversely affect the appearance of cotton yarns and fabric but are also usually associated with lower yarn strength, ends down in spinning and less-uniform yarn. Depending on the type and size of the nep, the appearance of dyed or printed fabrics is negatively influenced by the presence of these blemishes, which appear as white or dark spots on the surface, resulting in downgrading or rejection.Although neps have been identified as a major quality issue in cotton production and processing as far back as the late 1700s, no comprehensive review has been published on the formation, composition, measurement, consequences and ways to reduce the effects of neps, only a limited review has been published in 1999 [1]. Given the adverse effects on quality arising from neps, it was considered important to compile and publish a comprehensive and definitive review of published work and knowledge to date relating to cotton neps for this issue of Textile Progress. 相似文献
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为了减少并条后的棉结以提高棉条质量,从牵伸工艺不符合纤维弯钩伸直理论、生条中纤维分离度和平行伸直度差、生条中短绒高等方面,分析了并条后棉结增加的主要因为.通过大量试验分析,提出有效降低并条后棉结增加的措施:普梳头并、精梳预并、普梳粗纱牵伸工艺应符合前弯钩纤维伸直理论;普梳二并、精梳卷或条并卷、普梳细纱牵伸工艺应符合后弯... 相似文献
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针对当前精梳棉结的问题,分析了棉结产生的几种原因,并提出了减少精梳条棉结、杂质,提高精梳纱质量的一些方法和措施。 相似文献
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采用优化工艺、试验对比、效果跟踪的方法,探索了加大精梳机锡林针密对纤维进行充分梳理的效果,达到降低针织纱棉结、杂质的目的。 相似文献
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