1、Designation:D129422Standard Test Method forTensile Strength and Breaking Tenacity of Wool FiberBundles 1-in.(25.4 mm)Gage Length1This standard is issued under the fixed designation D1294;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,the year of 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 covers the determination of the break-ing force(or load)and estimation of the tensile streng
3、th andtenacity of wool fiber bundles with a 1-in.(25.4 mm)gagelength.A procedure for preparation of the fiber bundle isincluded.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for inform
4、ation onlyand are not considered standard.Because the instrument iscalibrated in inch-pound units,inch-pound units are shownfirst,contrary to Committee D13 policy.NOTE1For other methods of measuring breaking tenacity of fiberbundles,refer to Test Methods D1445 and D2524.NOTE2This test method can be
5、used for other fibers that lendthemselves to the same kind of preparation but the difference in densitymust be taken into account when calculating the tensile strength.It is notnecessary to know or correct for the density of a fiber when calculatingbreaking tenacity.1.3 This standard does not purpor
6、t 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 international standard was d
7、eveloped 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(TBT)Committee.2.Referenced Docu
8、ments2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD1445 Test Method for Breaking Strength and Elongation ofCotton Fibers(Flat Bundle Method)D1776 Practice for Conditioning and Testing TextilesD2524 Test Method for Breaking Tenaci
9、ty of Wool Fibers,Flat Bundle Method18-in.(3.2-mm)Gage Length(Withdrawn 2022)3D2525 Practice for Sampling Wool for Moisture(Withdrawn2022)3D4845 Terminology Relating to Wool3.Terminology3.1 For all terminology related to Wool and Wool Felt,D13.13,refer to Terminology D4845.3.1.1 The following terms
10、are relevant to this standard:gagelength;recycled wool;tenacity;tensile strength;wool(asdefined in the Wool Products Labeling Act of 1939).3.2 For all other terminology related to textiles see Termi-nology D123.4.Summary of Test Method4.1 The strength determination is based on the load requiredto br
11、eak a bundle of fibers which had been parallelized andheld under uniform tension with masking tape.A 1-in.(25.4mm)spacing between the tapes(and clamps at the zero setting)makes possible the cutting and weighing of this amount of fiberfor use in calculating the strength expressed as breakingtenacity
12、in grams-force per tex or tensile strength in pounds-force per square inch.5.Significance and Use5.1 Test Method D1294 for the determination of tensilestrength may be used for the acceptance testing of commercialshipments of wool,but caution is advised since techniciansmay fail to get good agreement
13、 between results.Comparativetests as directed in 5.1.1 may be advisable.5.1.1 If there are differences of practical significance be-tween reported test results for two laboratories(or more),comparative test should be performed to determine if there is a1This test method is under the jurisdiction ofA
14、STM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.13 on Wool and Felt.Current edition approved June 1,2022.Published July 2022.Originally approvedin 1953.Last previous edition approved in 2013 as D1294 05(2013)which waswithdrawn in January 2022 and reinstated in June
15、2022.DOI:10.1520/D1294-22.2For 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.3The last approved version of this histo
16、rical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,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 issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1statistical bias between them,usi
