1、Designation:D249413Standard Test Method forCommercial Mass of a Shipment of Yarn or ManufacturedStaple Fiber or Tow1This standard is issued under the fixed designation D2494;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provides a measurement of the com-mercial mass of a shipment of yarn or manufactured staplefiber or tow.T
3、his test method applies to(1)yarn of all fibertypes except silk,glass,asbestos,and bast;(2)tops and sliversof all fiber types except wool,silk,glass,asbestos,and bast;and(3)manufactured fibers or tow,except glass and otherfibers used for special purposes such as flock(Note 1).NOTE1For other test met
4、hods for measuring mass of fibrousmaterials,refer to Practice D2720.1.1.1 Sampling in this test method is primarily for use inacceptance testing rather than production control.manufac-tured fiber producers usually sample for the commercial“mass”of product on an on-going basis rather than eachshipmen
5、t to a customer.1.2 Commercial mass has been traditionally based on one ofthree options depending on the state of the material:(1)dried,unscoured yarn,staple fiber,tow,and so forth,using commer-cial moisture regain in the calculations;(2)dried,scoured yarn,staple fiber,tow,and so forth,using commerc
6、ial moistureregain values in the calculations;and(3)dried,scoured yarn,staple fiber,tow,and so forth,using a defined allowance in thecalculations.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purp
7、ort 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 Standards:2D123 Te
8、rminology Relating to TextilesD629 Test Methods for Quantitative Analysis of TextilesD1909 Standard Table of Commercial Moisture Regains forTextile FibersD2257 Test Method for Extractable Matter in TextilesD2258 Practice for Sampling Yarn for TestingD2720 Practice for Calculation of Commercial Weigh
9、t andYield of Scoured Wool,Top,and Noil for Various Com-mercial CompositionsD3333 Practice for Sampling Manufactured Staple Fibers,Sliver,or Tow for TestingD3888 Terminology for Yarn Spinning SystemsD3990 Terminology Relating to Fabric DefectsD4849 Terminology Related to Yarns and Fibers2.2 AATCC St
10、andard:150 Dimensional Changes in Automatic Home Launderingof Woven Garments33.Terminology3.1 Definitions:3.1.1 commercial mass,nbilled mass(weight)as deter-mined by a generally accepted method or as agreed uponbetween the purchaser and the seller.3.1.1.1 DiscussionThe basis for determining the comm
11、er-cial mass of a shipment of yarn or manufactured fibers isgenerally one of the following:(1)CAS Basis(commercial allowance with scouredmaterial)the mass of oven-dry fiber or yarn after scouring bydefinite prescribed methods plus the mass corresponding to itscommercial allowance.(2)CMRS Basis(comme
12、rcial moisture regain with scouredmaterial)the mass of oven-dry fiber or yarn after scouring by1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved July 1,2013.Published Septem
13、ber 2013.Originallypublished as D2494 66 T.Last previous edition approved in 2010 asD2494 02(2010)1.DOI:10.1520/D2494-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to
14、the standards Document Summary page onthe ASTM website.3Available from the American Association of Textile Chemists and Colorists,P.O.Box 12215,Research Triangle Park,NC 27709.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 definite presc
15、ribed methods plus the mass corresponding to itscommercial moisture regain.(3)CMRU Basis(commercial moisture regain with un-scoured material)the mass of unscoured oven-dry fiber oryarn plus the mass corresponding to its commercial moistureregain.(4)UN Basis(unadjusted net)the mass of unscouredfiber
16、or yarn with no adjustment for the amount of moisture orfinish,or both.3.1.2 commercial moisture regain,(CMR),na formallyadopted,arbitrary value,to be used with the oven-dried mass oftextile fibers,when calculating the commercial mass of ashipment or delivery.3.2 For definitions of the textile terms shipment and tareused in this test method,refer to Terminology D4849.3.3 For the terms laboratory sampling unit,moisturecontent,and oven-dry,refer to Terminology D123.3.4 For other terms used in this
