ASTM_D_6119_-_12.pdf

Designation:D611912Standard Practice forCreating Surface Appearance Changes in Pile Yarn FloorCovering from Foot Traffic1This standard is issued under the fixed designation D6119;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 practice covers the trafficking of pile yarn floorcoverings in a laboratory in order to effect a change in surfaceappearance as a result of exposure to foot traffic undercontrolled conditions.A separate test method covers theassessment of surface appearance change using the CRIReference Scales.1.2 This practice is applicable to most changes in surfaceappearance observed in all types of carpet that are intended forresidential or commercial use.It eliminates change in appear-ance associated with soiling by focusing on appearance changedue to matting,flattening,or change in pile fiber configuration.Although“pile reversal”or“watermarking”is occasionallyvisible,this practice is not a reliable method for producing thisphenomenon.1.3 This practice may be used by mutual agreement betweenthe purchaser and supplier to set purchasing specifications.1.4 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.1.5 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.Specific precau-tionary statements are given in Section 7.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD5684 Terminology Relating to Pile Floor Coverings2.2 TM-101 CRI Technical Bulletin:Assessment of Carpet Surface Appearance Change UsingCRI Reference Scales33.Terminology3.1 For definitions of terms relating to Pile Floor Coverings,D13.21,refer to Terminology D5684.3.1.1 The following terms are relevant to this standard:carpet,change in surface appearance,crush,finished,finishedpile yarn floor covering,floor covering,foot traffic units,lossof tuft definition,matting,pile,pile reversal,pile yarn floorcovering,textile floor covering,tufted fabric.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Practice4.1 Specimens are exposed to a specified number of foottraffics under controlled conditions.5.Significance and Use5.1 By exposure to sufficient traffic,this practice can beapplied to any pile yarn floor covering which undergoeschanges in surface appearance.5.1.1 This practice does not simulate surface appearancechanges due to soiling,pivoting,or rolling traffic,or traffic onstairs.6.Apparatus6.1 Area for Foot TraffcA room that meets the followingconditions:6.1.1 The floor must be level,rigid,and free of high and lowareas.Tile,concrete,or wood are satisfactory.This area shouldbe kept free of pedestrian traffic other than the designatedwalkers.6.1.2 The length of the test area shall be adequate for thespecimens plus the carpet walk-off areas at both ends of eachrow of specimens.These areas are necessary to align thewalkers to avoid twisting motion while stepping on thespecimens,and shall be a minimum of 2 yards(2 m)long.1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.Current edition approved Feb.1,2012.Published March 2012.Originallyapproved in 1997.Last previous edition approved in 2005 as D611905.DOI:10.1520/D6119-12.2For 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.3Available from CRI,P.O.Box 2048,Dalton,GA 30722.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.1.3 The width of the test area shall be adequate to layouta pattern with an odd number of lanes of specimens that requirethe walkers to automatically reverse their direction with eachpass through the course.See Fig.1 for typical traffic pattern.6.1.4 Physical Barriers,such as pylons,are suggested toensure straight-line entry and exit of the test area.6.1.5 Suitable Walk-Off Mats,used to eliminate tracking ofcontaminants.6.2 Double-Faced,Pressure Sensitive Tape,or other meanswhich will hold the specimens in place and yet permit easyremoval.6.3 Traffc Counting DeviceAn accurate means of count-ing foot traffic units.Photoelectric or hand held manualcounting devices are satisfactory.Install