ASTM_D_6571_-_22.pdf

Designation:D657122Standard Test Method forDetermination of Compression Resistance and RecoveryProperties of Highloft Nonwoven Fabric Using Static ForceLoading1This standard is issued under the fixed designation D6571;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 measurement of compres-sion resistance and recovery properties of any type of highloftnonwoven fabric using a simplistic and economical appliedstatic weight loading technique.1.2 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This test method offers two options for the measurementof compression resistance and recovery properties.Option 1contains fewer steps and is,therefore,simpler.Option 2 makesmore measurements and provides more details about thebehavior of a fabric under these test conditions.1.5 This international standard was developed 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 Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)33.Terminology3.1 Definitions:3.1.1 applied static force,nin testing,the application of afixed force by action of gravity on a fixed mass.3.1.2 batting,na textile filling material consisting of acontinuous web of fibers formed by carding,garnetting,airlaying,or other means.3.1.3 compression force,nthe perpendicular force appliedto surface(s)of a material in compaction.3.1.4 compression recovery,nthe property of a material toregain its original dimensions after release from compaction.3.1.5 compression resistance,nthe property of a materialto oppose its change in dimension under compaction.3.1.6 dead-weight loading,nin testing,a method of load-ing in which a mass is supported solely by the specimen andhas no other mechanical connection to the test machine.Staticloading may be considered a synonym of dead-weight loading.3.1.7 elastic loss,nthe permanent loss of specimensoriginal dimension after the compression or tension force isapplied and then subsequently removed.3.1.8 highloft nonwoven fabric,na low-density fiber net-work structure characterized by a high ratio of thickness tomass per unit area.3.2 For definitions of other textile terms,refer to Terminol-ogy D123.4.Summary of Test Method4.1 A specimen(one piece of or a stack of pieces)is placedbetween two plates and the height of the stack measured.Aweight of specified mass is placed on the top plate for aspecified period of time.The height of the specimen with themass in place is measured at specified time intervals.The massis removed and the height of the stack is measured at specified1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.90 on Executive.Current edition approved March 1,2022.Published April 2022.Originallyapproved in 2005.Last previous edition approved in 2001 as D6571-011whichwas withdrawn October 2008 and reinstated in March 2022.DOI:10.1520/D6571-22.2For 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 historical 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.1time intervals.Compression resistance and recovery propertiesare calculated using the height measurements.5.Significance and Use5.1 The ability of a highloft nonwoven fabric to resistcompression and recovery and elastic loss after compressionare two basic physical properties that are measured to setspecifications for certain end-u