1.1 本实施规程涵盖了纱线结构的指定说明，适用于单根纱线、合股纱线、电缆纱线或长丝或纺纱线。通过实例说明了实践在具体案例中的应用。本规程不包括对各种新型纱线或包芯纱的描述。 1.2 本实践的主要目的是建立一个参考系统，用于行业，尤其是通信和出版物。为了确保简化符号，可以省略某些部分，前提是对省略的部分没有疑问。 1.3 以英寸-磅为单位的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 6.1 提出两种符号顺序是为了满足纺织工业和纺织技术中遇到的两种不同需求。单层到层符号满足纱线制造商的需求，主要根据其制造规范来描述单纱、合股纱或电缆纱。基于合成纱线数量的层数到单纱表示法满足了对单纱组分的线密度或捻度兴趣相对较小但主要对最终产品感兴趣的纱线用户的需求。 这两种符号之间的主要区别在于信息的呈现顺序。在这种实践中，两种符号使用相同的符号，并保留其通常的数学含义。 6.2 对于直接和间接纱线编号系统中编号的纱线，规定了单层到层的表示法，并符合纺织工业大部分领域的当前使用情况。对于直接纱线编号系统中编号的纱线，规定了单层到单层的表示法，其使用得到了文件N362中ISO/TC 38的批准。 后一种表示法以前未包含在实践中 D1244 . 对于间接纱线编号系统中编号的纱线，不建议使用层到单符号，因为当符号在不同的符号中具有不同的含义时，或使用时与其既定的数学意义相冲突时，可能会产生混淆。 6.3 乍一看，推荐的符号可能看起来相当复杂，但实际上它是一种描述复杂结构的简明方法。例如，比较以下对纱线的描述: “由3股合股纱线制成，每英寸Z捻的总棉数为1.4和5圈，每英寸S捻9圈，每股由5股24支棉纱合股，每英寸Z捻15圈，从1 1. / 16 在里面主食，分级严格中低，马克隆值为 4.3 “根据实施例23中对相同纱线的描述， 东北24 c Z 15 tpi（棉，1 1. / 16 在里面SLM，4.3马克隆 读数）/5 S 9 tpi/3 Z 5 tpi；R 1.4 c.c。 (23) 6.4 ASTM建议（见实践 D861 )，一般使用tex通用纱线编号系统。 6.5 编号系统的指定，例如棉支、毛纺和亚麻革，不会将纱线成分限制为指定的纤维。参见示例5。 6.6 用于指定不同纱线编号系统的术语经常缩写。看见 4.13 – 4.16 . 6.7 各种纱线编号 单位 （棉花计数、tex等）应与 所有物 它被指定为线密度。最后一个术语涵盖了尺寸或细度的概念。 这种区别与使用 单位 ，（升或加仑），表示 所有物 例如对象的体积。

1.1 This practice covers instructions for the designation of yarn construction and is applicable to single yarns, plied yarns, and cabled yarns or cords of filaments or spun fibers. The application of the practice to specific cases is illustrated with examples. This practice does not cover the description of novelty yarns or core spun yarns of various types. 1.2 The primary purpose of this practice is to establish a reference system for use in the trade and particularly for use in correspondence and publications. To secure a simplified notation, certain portions may be omitted provided there is no doubt as to the omitted parts. 1.3 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 6.1 The two orders of notation are presented to satisfy two separate needs encountered in the textile industry and in textile technology. The single-to-ply notation meets the needs of yarn manufacturers to describe a single yarn, or a plied or cabled yarn primarily in terms of its manufacturing specifications. The ply-to-single notation, based on the resultant yarn number, meets the needs of users of yarn who have relatively little interest in the linear density or twist of the single yarn component(s) but are interested mainly in the final product. The chief difference between the two notations is the order in which the information is presented. In this practice the same symbols are used for both notations and retain their usual mathematical meanings. 6.2 The single-to-ply notation is prescribed for yarns numbered in both direct and indirect yarn numbering systems and conforms with current usage in large sections of the textile industry. The ply-to-single notation is prescribed for yarns numbered in a direct yarn numbering system and its use is approved by the ISO/TC 38 in Document N362. This latter notation has not been included previously in Practice D1244 . The ply-to-single notation has not been recommended for use with yarns numbered in indirect yarn numbering systems because of possible confusion when symbols are used with different meanings in different notations or used in conflict with their established mathematical significance. 6.3 At first glance, the recommended notation may appear rather involved, but in actuality it is a concise method for describing complex structures. For example, compare the following description of a yarn: “A cabled yarn or cord with a resultant cotton count of 1.4 and 5 turns per inch of Z twist made from 3 strands of plied yarn with 9 turns per inch of S twist each plied from 5 strands of 24 cotton count yarn with 15 turns per inch of Z twist and spun from 1 1 / 16 in. staple, graded strict low middling, and having a Micronaire reading of 4.3 ” with the description of the same yarn stated in Example 23, 24 Ne c Z 15 tpi (cotton, 1 1 / 16 in., SLM, 4.3 Micronaire Reading) /5 S 9 tpi/3 Z 5 tpi; R 1.4 c.c. (23) 6.4 ASTM recommends (see Practice D861 ), the general use of the tex universal yarn numbering system. 6.5 The designation of a numbering system, for example, cotton count, woolen run, and linen lea, does not restrict the yarn composition to the named fiber. See Example 5. 6.6 The terms used to designate different yarn numbering systems are frequently abbreviated. See 4.13 – 4.16 . 6.7 The various yarn numbering units (cotton count, tex, etc.) should be carefully distinguished from the property which has been designated as linear density. This last term covers the concept of size or fineness. The distinction is comparable to the use of the units , (litres or gallons), to express a property such as the volume of an object.