1、Designation: D2497 07 (Reapproved 2018)Standard Tolerances forManufactured Organic-Base Filament Single Yarns1This standard is issued under the fixed designation D2497; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st 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 These tolerances cover first-quality, manufactured,organic-base filament single yarns (namely, bright, semi-dull,dull, s
3、olution-dyed, bleached, unbleached, etc.) regardless ofthe package type. These tolerances cover permissible varia-tions in linear density, tenacity, elongation, twist, and commer-cial weight.1.1.1 These tolerances do not apply to rubber yarns, span-dex yarns, metal-covered yarns, nor to bulk yarns s
4、ince testmethods for these types of yarn are not available. Thesetolerances do not apply to industrial filament yarns.NOTE 1Tolerances for inorganic glass yarns are given in Specifica-tions and Methods D578/D578M.1.2 This standard covers only tolerances. It does not coverspecifications or quality le
5、vels, for yarns to be used for anypurpose. Specifications for specific properties are subject toagreement by the purchaser and the supplier.NOTE 2While the tolerances specified may be applied to yarn takenfrom fabric, the properties of such yarns will likely differ from the originallevel.1.3 This st
6、andard does not 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This i
7、nternational standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TB
8、T) Committee.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD578/D578M Specification for Glass Fiber StrandsD1423/D1423M Test Method for Twist in Yarns by Direct-CountingD1907/D1907M Test Method for Linear Density of Yarn(Yarn Number) by the Skein MethodD2256_D2256 T
9、est Method for Tensile Properties of Yarnsby the Single-Strand MethodD2258/D2258M Practice for Sampling Yarn for TestingD2494 Test Method for Commercial Mass of a Shipment ofYarn or Manufactured Staple Fiber or TowD4849 Terminology Related to Yarns and Fibers3. Terminology3.1 For all terminology rel
10、ating to D13.58, Yarns andFibers, refer to Terminology D4849.3.1.1 The following terms are relevant to this standard:tolerances.3.2 For all other terminology relating to textiles, refer toTerminology D123.4. Significance and Use4.1 These tolerances may be used as a guide in purchaser/supplier disput
11、es, or to assist in assigning nominal values forlinear density and twist. The tolerances listed for each propertyrepresent the maximum variations deemed acceptable in thetrade.5. Test Methods5.1 Take a sample of yarn as directed in Practice D2258/D2258M. Make the indicated tests as directed in Test
12、MethodD1907/D1907M for Yarn Number, Test Method D1423/D1423M for Direct Twist, Test Method D2256_D2256 forSingle Strand Breaking Strength, and Test Method D2494 forCommercial Mass.6. Tolerances6.1 Linear DensityThe average linear density shall con-form to the average linear density agreed upon betwe
13、en thepurchaser and the supplier with the tolerances specified inTable 1.6.2 StrengthThe average breaking force of the yarn deter-mined in single strand tests or the average force at a specificlevel of elongation, in each packing case of ten or more yarn1These tolerances are under jurisdiction of AS
14、TM Committee D13 on Textilesand are the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved July 1, 2018. Published July 2018. Originally approvedin 1963 replacing D1235, D1236, and D1237. Last previous edition approved in2012 as D2497 07 (2012). DOI: 10.1520/D2
15、497-07R18.2For 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 the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive
16、, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issu
17、ed by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1packages or on a beam, shall be equal to or exceed thepreviously agreed upon level.6.3 ElongationThe average elongation of the yarn at thebreaking force or at a specified force, in each packing case often or more yarn pa
18、ckages or on a beam, shall conform to thelimits: specified elongation 620 % of the specified averageelongation.6.4 Twist:6.4.1 DirectionThe direction of twist shall be S or Z asspecified.6.4.2 Number of TurnsThe average number of turns perunit length of yarn, in each packing case of ten or more yarn
19、packages or on a beam, shall conform to the tolerancesspecified in Table 2.6.5 Commercial MassCommercial mass shall conform tothe limits: invoice mass 61.0 % of the invoiced mass.NOTE 3Particular attention is drawn to the results of an interlabora-tory test described in Section 10 of Method D2494.7.
20、 Conformance7.1 The purchaser and the supplier may agree on a proce-dure to establish conformance, including control charts fur-nished by the supplier, a sequential-sampling plan, or thedouble-sampling plan outlined in 7.2.7.2 In the absence of a control-chart or sequential-samplingplan, proceed as
21、directed in 7.2.1 7.2.3.7.2.1 If the test results for the lot conform to the tolerancesfor all characteristics specified in Section 6, consider the lot avalid delivery.7.2.2 If the test results for one or more characteristics do notconform to the tolerances, take a new laboratory sample fromeither t
22、he original lot sample or a new lot sample. Retest the lotfor the characteristic(s) that did not conform to the tolerancesin the first test, and average the results of the first and secondsamples as if all results were from one test of double theoriginal number of specimens. If the new average(s) co
23、n-form(s) to the specified tolerances, consider the lot a validdelivery.7.2.3 If the test results obtained as directed in 7.2.2 do notconform to the specified tolerances, consider the lot a nonvaliddelivery.8. Keywords8.1 breaking strength; cellulose-base man-made fibers;commercial mass; elongation
24、strand; man-made-fibers; organicbase; strand; synthetic base; tolerances; twist; yarn; yarnnumberASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determi
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26、thdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that y
27、our comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (si
28、ngle or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright
29、Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Average Linear Density TolerancesTolerance ofAverageLinearDensity,%Each Individual Yarn Package, Except Beams:All yarns with linear density of 4.4 tex and above or 40 denierand above4.0All yarns with linear density
30、 below 4.4 tex or 40 denier 6.0Each Beam, or Each Case Comprising 10 or More Packages:All yarns 3.0TABLE 2 Twist TolerancesTolerancesTurns per Metre:From zero to 40, incl 10 turns per metreOver 40 and up to and including 400 20 turns per metreOver 400 5.0 % of the specified averagetwistTurns per Inch:From zero to 1, incl 0.25 turn per inchOver 1 and up to and including 10 0.5 turn per inchOver 10 5.0 % of the specified averagetwistD2497 07 (2018)2
