1.1 本规程涵盖了使用特克斯系统来指定纤维和由任何类型的纤维或纤维组合制成的纱线的线密度（数量或计数）。它也适用于其他纺织材料，包括纱线中间体（条子、粗纱、毛条等）、单纱或合股纱、绳索和线。 注1: 线密度的单位长度质量概念适用于长度与横截面之比很高的任何材料。 1.2 各种间接和直接纱线编号到精确特克斯当量的转换系数可以在标准表中找到 D2260 . 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 特克斯系统已被国际标准化组织纺织品技术委员会38（ISO/TC 38）批准普遍使用，该委员会还推荐了一份用于纤维和所有类型纱线的圆形特克斯编号列表。表中给出了不同传统系统中各种数字对应的四舍五入的tex数字的转换表 D2260 以及ISO 2947。 4.2 用于指定纤维和纱线线密度的tex系统是基于单位长度质量的直接系统， M/L， 并采用公制长度和质量单位。 特克斯单位，克每公里（1000米）已获得ISO/TC 38的批准，可用于所有纤维和所有类型的纱线。委员会还批准了粗结构使用千特和十特数，纤维使用分特和毫特数。 4.3 特克斯系统与纱线的粗度或反细度有关，因为特克斯数随着纱线单位长度尺寸或质量的增加而增加。特克斯系统适用于所有国家纺织业的所有分支，用于由所有类型的纤维或纤维混合物制成的纱线。

1.1 This practice covers the use of the tex system to designate the linear density (number, or count) of fibers and of yarns made from any type of fiber or combination of fibers. It is also applicable to other textile materials, including yarn intermediates (slivers, rovings, tops, and so forth), single or plied yarns, cords, and threads. Note 1: The mass per unit length concept of linear density is applicable to any material which has a high ratio of length to cross section. 1.2 Conversion factors for various indirect and direct yarn numbers to exact tex equivalents can be found in Standard Tables D2260 . 1.3 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. 1.4 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 ====== 4.1 The tex system has been approved for general use by the International Organization for Standardization, Technical Committee 38 on Textiles (ISO/TC 38), which has also recommended a list of rounded tex numbers for use with fibers and all types of yarns. Conversion tables showing the rounded tex numbers corresponding to various numbers in different traditional systems are given in Tables D2260 and ISO 2947. 4.2 The tex system for designation of the linear density of fibers and yarns is a direct system based on mass per unit length, M/L, and employs metric units of length and mass. The tex unit, grams per kilometre (1000 m) has been approved by ISO/TC 38 for use with all fibers and all types of yarn. The committee has also approved the use of kilotex and decatex numbers for coarse structures and decitex and millitex numbers for fibers. 4.3 The tex system relates to the property commonly associated with coarseness, or inverse fineness of a yarn because the tex numbers increase with an increase in the size or mass per unit length of the yarn. The tex system is intended for use by all branches of the textile industry, in all countries, for yarns made from all types of fibers or mixtures of fibers.