ASTM D861-2007 Standard Practice for Use of the Tex System to Designate Linear Density of Fibers Yarn Intermediates and Yarns《用Tex系统命名纤维、纱半成品和纱线的线性密度标准实施规程》.pdf
《ASTM D861-2007 Standard Practice for Use of the Tex System to Designate Linear Density of Fibers Yarn Intermediates and Yarns《用Tex系统命名纤维、纱半成品和纱线的线性密度标准实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM D861-2007 Standard Practice for Use of the Tex System to Designate Linear Density of Fibers Yarn Intermediates and Yarns《用Tex系统命名纤维、纱半成品和纱线的线性密度标准实施规程》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 861 07Standard Practice forUse of the Tex System to Designate Linear Density ofFibers, Yarn Intermediates, and Yarns1This standard is issued under the fixed designation D 861; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice co
3、vers the use of the tex system todesignate the linear density (number, or count) of fibers and ofyarns made from any type of fiber or combination of fibers. Itis also applicable to other textile materials, including yarnintermediates (slivers, rovings, tops, etc.), single or plied yarns,cords, and t
4、hreads.NOTE 1The mass per unit length concept of linear density is appli-cable to any material which has a high ratio of length to cross section.1.2 Conversion factors for various indirect and direct yarnnumbers to exact tex equivalents can be found in StandardTables D 2260.1.3 This standard does no
5、t purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standard
6、s:2D 123 Terminology Relating to TextilesD 2260 Tables of Conversion Factors and Equivalent YarnNumbers Measured in Various Numbering SystemsD 4849 Terminology Relating to Yarns and Fibers2.2 ISO Standards:ISO 2947 TextilesIntegrated Conversion Table for Re-placing Traditional Yarn Numbers by Rounde
7、d Values inthe Tex System33. Terminology3.1 For all terminology relating to D13.58, Yarns andFibers, refer to Terminology D 4849.3.1.1 The following terms are relevant to this standard:linear density, tex.3.2 For all other terminology relating to textiles, see Termi-nology D 123.4. Significance and
8、Use4.1 The tex system has been approved for general use by theInternational Organization for Standardization, TechnicalCommittee 38 on Textiles (ISO/TC 38), which has alsorecommended a list of rounded tex numbers for use with fibersand all types of yarns. Conversion tables showing the roundedtex num
9、bers corresponding to various numbers in differenttraditional systems are given in Tables D 2260 and ISO 2947.4.2 The tex system for designation of the linear density offibers and yarns is a direct system based on mass per unitlength, M/L, and employs metric units of length and mass. Thetex unit, gr
10、ams per kilometre (1000 m) has been approved byISO/TC 38 for use with all fibers and all types of yarn. Thecommittee has also approved the use of kilotex and decatexnumbers for coarse structures and decitex and millitex numbersfor fibers.4.3 The tex system relates to the property commonly asso-ciate
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