1.范围1。1本国际标准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，以及松开时的长度变化 计数方法。1.2本国际标准适用于a）单纱（细纱和长丝）、b）股线和c）缆线。每种纱线都有单独的程序。该方法主要用于包装中的纱线， 但是，在采取特殊预防措施的情况下，这些程序可以用于从织物中提取的纱线。它不适用于 单丝捻度的测定。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 7211-4.1.3本国际标准涵盖了对股线和缆线捻度的测定，具体如下:a）股线中:股线的最终捻度和股线前单纱的原始捻度；b） 在电缆纱线中:-纱线的最终电缆捻度-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。1.4如果需要，可以在最终结构中调整单纱和股线的捻度 根据10.5.7.1.5中给出的特殊程序确定，本国际标准不适用于拉伸超过 当张力从0.5cn增加到1.0cn时，单位纱线线密度为0.5%。 这种纱线可以在特殊的张力条件下进行测试，该条件为所有相关方所接受 测试结果。1.6本国际标准不适用于开口纺纱和混合纺纱产品 （交织）复丝纱线。1.7本国际标准不适用于太大而无法放入纱线中的纱线 试验装置的夹具没有挤压或变形，严重程度足以影响试验结果。

1 Scope1.1 This International Standard 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.1.2 This International Standard is applicable toa) single yarns (spun and filament),b) plied yarns, andc) cabled 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 7211-4.1.3 This International Standard covers the determination of twist in plied and cabled yarns as follows:a) in plied yarns: the final twist of the plied yarns and the original twist of the single yarn before plying;b) 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.1.4 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 10.5.7.1.5 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.1.6 This International Standard is not suitable for products of open-end spinning and intermingled (interlaced) multifilament yarns.1.7 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.