ASTM_D_7267_-_13.pdf

Designation:D726713Standard Test Method forEdge Ravel Resistance of Finished Loop Pile,Pile YarnFloor Covering1This standard is issued under the fixed designation D7267;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 covers the determination of the forcerequired to ravel a straight sewn yarn from the edge of a looppile,textile floor covering.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 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 Coverings3.Terminology3.1 For definitions of terms relating to pile floor coverings,refer to Terminology D5684.3.2 The following terms are relevant to this standard:carpet,constant-rate-of-extension,finished,finished pile yarn floorcovering,floor covering,loop pile yarn floor covering,pile,pile yarn floor covering,textile floor covering,tuft,tuft leg,tufted fabric,edge ravel.3.3 For definition of other terms related to textiles,refer toTerminology D123.4.Summary of Test Method4.1 A yarn end is raveled from a straight sewn,loop piletextile floor covering using a tensile testing machine.The forcerequired to pull the tufted yarn from the edge of a tufted looppile floor covering is measured and recorded.The required loador force to remove the yarn from the specimen is calculated anddefined as“edge ravel strength.”Floor covering installationexperts recommend using a seam sealer to secure the cut edgesof a textile floor covering.5.Significance and Use5.1 The satisfactory performance of a loop pile floor cover-ing depends,to a considerable extent,on the installation andmaintenance of the product.A loop pile floor covering withinadequate edge ravel strength may result in loops pulling outfrom the backing,resulting in an aesthetically displeasingappearance.Tuft rows located at the seam of a loop pile floorcovering are the most susceptible to raveling.6.Apparatus6.1 Tensile Testing MachineA constant-rate-of extension(CRE)type conforming to Specification D76,a constant rate ofspeed of 12 6 0.5 in./min(300 6 10 mm/min)is required.Full-scale loads range from 1 to 10 lb(0.545 to 4.53 kg)aregenerally adequate.A constant rate of traverse(CRT)typetensile testing machine conforming to the Specification D76and operated at the same speed is permitted.There may be nooverall correlation with CRE-type and CRT-type testing ma-chines.Consequently,the two machines cannot be used inter-changeably.In the case of controversy,the CRE-type testingmachine shall prevail.6.2 Clamps and Jaw FacesThe use of hydraulic orpneumatic,serrated or padded face,clamping systems with aminimum of 1 by 3 in.(25 by 75 mm)are recommended toreduce specimen slippage.The faces shall be parallel and havematching centers with respect to one another(in the sameclamp)and to the corresponding jaw face of the other clamp.7.Sampling,Test Specimens,and Test Units7.1 Lot SampleWhen performing acceptance testing for asample lot,take at random the number of rolls or pieces of pileyarn floor covering as directed on an applicable material1This 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 2006.Last previous edition approved in 2012 as D726712.DOI:10.1520/D7267-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 specification or other agreement between the purchaser and thesupplier.Consider the rolls or pieces of pile yarn floor coveringto be the primary sampling units.In the absence of suchagreement,take one roll or piece from the lot to be tested.7.2 Laboratory SampleFor acceptance testing,take a“laboratory sampling unit”that is a minimum of 18 in.(460mm)in the machine direction by full width(cross machinedirection)from each roll or piece in the lot sample.7.3 Test SpecimensFrom eac