BS EN ISO 2061:2015规定了测定纱线捻度方向的方法， 扭转量，以单位长度的圈数表示，以及松开时长度的变化，由 直接计数法。本国际标准适用于单纱（细纱和长丝）、股线和缆线。每种纱线都有单独的程序。这种方法主要是为纱线设计的 包装，但如果采取特殊预防措施，该程序可用于从织物中提取的纱线。它是 不适用于测定单丝的捻度。注:另见ISO 1890，该标准专门为玻璃纤维纺织技术的需要而制定，以及 ISO 7211-4。本国际标准涵盖了对成股纱线和成股纱线捻度的测定，具体如下:成股纱线:成股纱线的最终捻度和成股前单纱的原始捻度 飞行；成缆纱线:纱线的最终成缆捻度；合股后，但在最后一个加工阶段之前，合股纱线的原始捻度；合股前单纱的捻度。如果需要，单股纱线和股线纱线的捻度，因为它们位于最终结构中，可以调整 根据10.5.7中给出的特殊程序确定。除非经协议，否则本国际标准不适用于拉伸超过 当纱线的单位线密度从0.5cn增加到1.0cn时，张力为0.5% 这种纱线可以在各方接受的特殊张力条件下进行测试 对测试结果感兴趣。本国际标准不适用于开口纺纱和混合纺纱的产品 （交织）复丝纱线。本国际标准不适用于太大而无法放置的纱线 在试验装置的夹具中，没有严重到足以影响试验的挤压或变形 后果交叉引用:ISO 2ISO 139ISO 1890ISO 7211-4购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS EN ISO 2061:2015 specifies a method for the determination of the direction of twist in yarns, the amount of twist, in terms of turns per unit length, and the change in length on untwisting, by the direct counting method.This International Standard is applicable tosingle yarns (spun and filament),plied yarns, andcabled yarns.Separate procedures are given for each type of yarn. The method is designed primarily for yarns in packages, but, with special precautions, the procedures can be used for yarns taken from fabrics. It is not suitable for the determination of twist in a monofilament.NOTE See also ISO 1890, which was prepared especially for the needs of glass textile technology, and ISO 7211-4.This International Standard covers the determination of twist in plied and cabled yarns as follows:in plied yarns: the final twist of the plied yarns and the original twist of the single yarn before plying;in cabled yarns:the final cabling twist of the yarn;the original twist of the plied yarn after plying, but prior to the last stage of processing;the twist of the single yarn before plying.If desired, the twist of single and plied yarn components, as they lie in the final structure, can be determined by the special procedure given in 10.5.7.This International Standard is not applicable, except by agreement, to yarns which stretch more than 0,5 % when the tension increases from 0,5 cN to 1,0 cN per unit linear density of the yarn expressed in tex. Such yarns can be tested under special conditions of tension which are accepted by all parties interested in the test results.This International Standard is not suitable for products of open-end spinning and intermingled (interlaced) multifilament yarns.This International Standard is not applicable to yarns which are too large to permit their being placed in the clamps of the testing apparatus without crushing or distortion severe enough to affect the test results.Cross References:ISO 2ISO 139ISO 1890ISO 7211-4All current amendments available at time of purchase are included with the purchase of this document.