ASTM_D_1335_-_12.pdf

Designation:D133512Standard Test Method forTuft Bind of Pile Yarn Floor Coverings1This standard is issued under the fixed designation D1335;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()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 test method covers the measurement of forcerequired to pull or break a tuft from a pile floor coveringsample.1.2 This test method is applicable to both cut and loop pileyarn floor covering.1.3 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 information onlyand are not considered standard.1.4 This standard 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD5684 Terminology Relating to Pile Floor CoveringsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 For all terminology related to Pile Floor Coverings,D13.21,refer to Terminology D5684.3.1.1 The following terms are relevant to this standard:carpet,constant-rate-of-extension,cut pile yarn floor covering,finished,finished pile yarn floor covering,floor covering,looppile yarn floor covering,pile,pile yarn floor covering,textilefloor covering,tuft,tuft bind,tuft leg,tufted fabric.3.2 For all other terminology related to textiles see Termi-nology D123.4.Summary of Method4.1 Atest sample is mounted in a special clamping fixture tothe base of a tensile testing machine.A hook(for loopsspecimen)or a tuft clamp(for cut pile specimen)are used toremove a specimen from the sample.The force to pull thespecimen free from the test sample is measured as the tuft bind.5.Significance and Use5.1 Test Method D1335 for tuft bind of pile yarn floorcoverings is being used for acceptance testing of commercialshipments.Comparative tests as directed in 5.1.1 may beadvisable.5.1.1 In case of a dispute arising from differences inreported test results using this test method,the purchaser andthe supplier should conduct comparative tests to determine ifthere is a statistical bias between their laboratories.Competentstatistical assistance is recommended from the investigation ofbias.As a minimum,the two parties should take a group of testsamples that are homogeneous as possible and are from a lot ofmaterial of the type in question.The test samples should thenbe randomly assigned in equal numbers to each laboratory fortesting.The average results from the two laboratories should becompared using appropriate statistical analysis,and a probabil-ity level chosen by the two parties before testing begun.If abias is found,either its cause must be found and corrected orthe purchaser and the supplier must agree to interpret futuretest results with consideration to the known bias.5.2 The satisfactory performance of a pile yarn floor cover-ing depends to a considerable extent on the maintenance of itsoriginal appearance.In a cut pile yarn floor covering aninadequate tuft bind may result in complete loss of pile in areasexposed to severe wear.In a looped pile yarn floor coveringwith inadequate tuft bind the pile loops may be pulled out toform unsightly long loops which may be hazardous.6.Apparatus6.1 Tensile Testing Machine,Constant-rate-of-extension(CRE)type,conforming to Specification D76,with a capacity1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 1954.Discontinued in November 1995 and reinstated as D1335 98.Last previous edition approved in 2011 as D1335 11.DOI:10.1520/D1335-12.2For 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,PO Box C700,West Conshohocken,PA 19428-2959.United States1 selected such that the force required to complete the test fallswithin 15 to 85%of full scale.A full scale ranging from 1 to25 lbf(4.45 to 111 N)is generally adequate.For constant-rate-of-extension(CRE)type and constant-rate-of-traverse(C