ASTM D2644-2012 Standard Tolerances for Yarns Spun on the Woolen System 《毛织品系统的细纱标准公差》.pdf
《ASTM D2644-2012 Standard Tolerances for Yarns Spun on the Woolen System 《毛织品系统的细纱标准公差》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2644-2012 Standard Tolerances for Yarns Spun on the Woolen System 《毛织品系统的细纱标准公差》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2644 12Standard Tolerances forYarns Spun on the Woolen System1This standard is issued under the fixed designation D2644; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These tolerances are applicable to all yarns spun on thewoolen system and composed of any fiber or mixture of fibers,even though there might not be any wo
3、ol present in the yarn.NOTE 1For tolerances for other spun yarns, see Tolerances D2645 .2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1422 Test Method for Twist in Single Spun Yarns by theUntwist-Retwist MethodD1423 Test Method for Twist in Yarns by Direct-Counting
4、D1578 Test Method for Breaking Strength of Yarn in SkeinFormD1907 Test Method for Linear Density of Yarn (YarnNumber) by the Skein MethodD2256 Test Method for Tensile Properties of Yarns by theSingle-Strand MethodD2257 Test Method for Extractable Matter in TextilesD2258 Practice for Sampling Yarn fo
5、r TestingD2494 Test Method for Commercial Mass of a Shipment ofYarn or Manufactured Staple Fiber or TowD2645 Tolerances for Yarns Spun on the Cotton or WorstedSystemsD4849 Terminology Related to Yarns and Fibers3. Terminology3.1 For terminology related to yarn test methods, refer toTerminology D4849
6、.3.2 For definitions of other terms, refer to TerminologyD123.4. Sampling4.1 Take samples as directed in the applicable materialspecification, or as agreed upon by the purchaser and thesupplier. In the absence of an applicable specification or otheragreement, proceed as directed in Practice D2258.5.
7、 Tolerances5.1 StrengthThe average breaking force of each lot shallbe equal to or greater than the specified minimum average.5.2 Yarn NumberThe average yarn number shall be withinthe following tolerances:Deviation fromthe SpecifiedYarn Number, %500 tex or 0.6 woolen run to 165 tex or 1.86 woolen run
8、 6 7.5Finer than 165 tex or 1.86 woolen run 6 5.05.3 Twist:5.3.1 The direction of twist in each package or end shall beS or Z, as specified.5.3.2 The average twist shall conform to the limits: speci-fied value 6 7.5 % of the specified value.5.3.3 The average twist of the package containing thehighes
9、t average twist shall not be higher than that of thepackage containing the lowest average twist by more than15.0 % of the lower average.5.4 Extractable MatterThe average percent extractablematter shall not exceed the following values:%Dry-spun 2.0Oil-spun, semi-scoured 15.0Oil-spun scoured:Blends, 5
10、0 % wool or less 4.0All wool or more than 50 % wool 10.05.5 Commercial MassIn the absence of other contractualagreements, the invoice mass, that is the commercial mass asadopted in a specific branch of the textile trade and asdetermined by the supplier, shall not exceed the commercialmass as determi
11、ned by the purchaser, by more than 1 %. Inbranches of the textile trade which use the net mass as thecommercial mass, the latter is subject to the same limitation.NOTE 2Particular attention is drawn to the results of an interlabora-tory test described in Section 10 of Test Method D2494.6. Test Metho
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD26442012STANDARDTOLERANCESFORYARNSSPUNONTHEWOOLENSYSTEM 毛织品 系统 细纱 标准 公差 PDF

链接地址:http://www.mydoc123.com/p-513225.html