ASTM_D_5793_-_13.pdf

Designation:D579313Standard Test Method forBinding Sites per Unit Length or Width of Pile Yarn FloorCoverings1This standard is issued under the fixed designation D5793;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.1.Scope1.1 This test method describes the measurement of thenumber of binding sites per unit length or width of machine-made,woven,knitted,and tufted pile yarn floor covering bothbefore and after adhesive backing application.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 information onlyand are not considered standard.1.3 Determination of the number of binding sites per unitlength or width of pile floor covering previously was containedwithin Test Methods D418.NOTE1For user convenience,Subcommittee D13.21 has subdividedTest Method D418 into separate standards,of which this test method isone.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ASTM Standards:2D123 Terminology Relating to TextilesD418 Test Method for Testing Pile Yarn Floor CoveringConstruction(Withdrawn 1998)3D1776 Practice for Conditioning and Testing TextilesD1909 Standard Table of Commercial Moisture Regains forTextile FibersD2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)3D2906 Practice for Statements on Precision and Bias forTextiles(Withdrawn 2008)3D5684 Terminology Relating to Pile Floor CoveringsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 For definitions terms relating to Pile Floor Coverings,D13.21,refer to Terminology D5684.3.1.1 The following terms are relevant to this standard:backcoating,backing,backing fabric,binding site,buried pile yarn,carpet,components,finished,finished pile yarn floor covering,floor covering,lengthwise direction,needles per unit width,pile,pile heights,pile yarn floor covering,pile yarn mass,pitch,stitches,stubble,textile floor covering,tuft,tufted fabric,widthwise direction.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Test Method4.1 The length of pile floor covering containing 40 bindingsites is measured in either the lengthwise or widthwise direc-tion as required and the number of binding sites per unit lengthis calculated.5.Significance and Use5.1 This test method is useful in quality and cost controlduring manufacture.Both appearance and performance of pileyarn floor coverings can be affected by the number of bindingsites per length and width.5.2 This test method is considered satisfactory for accep-tance testing of commercial shipments because current esti-mates of between-laboratory precision are acceptable and themethod is used extensively in the trade for acceptance testing.5.2.1 If there are differences of practical significance be-tween reported test results for two laboratories(or more),comparative tests should be performed to determine if there isstatistical bias between them using competent statistical assis-tance.As a minimum,use test samples for such comparativetests that are as homogeneous as possible,drawn form the samelot of material as the samples that resulted in the disparate1This 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 1,2013.Published August 2013.Originallyapproved in 1995.Last previous edition approved in 2005 as D5793 05.DOI:10.1520/D5793-13.2For 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 the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 results during initial testing,and that are randomly assigned inequal numbers to each laboratory for testing.The test resultsfrom the laboratories should be compared using a statistical testfor unpaired data at a probability level chosen prior to thetesting series.If a bias is found either its cause must be foundand corrected,or future test results for that material must beadjusted in consideration of the know bias.6.Apparatus6.1 Shears or Clippers,capa