ASTM_D_6571_-_01.pdf

Designation:D 6571 01Standard Test Method forDetermination of Compression Resistance and RecoveryProperties of Highloft Nonwoven Fabric Using Static ForceLoading1This standard is issued under the fixed designation D 6571;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(e)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 and health practices and determine the applica-bility of regulatory limitations prior to use.1.3 The values stated in SI units are to be regarded as thestandard.The values stated in parentheses are for informationonly.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.2.Referenced Documents2.1 ASTM Standards:D 123 Terminology Relating to Textiles2D 5796 Test Method for Thickness of Highloft NonwovenFabrics32.2 ASTM Adjuncts:D 2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data2D 2906 Practice for Statements on Precision and Bias forTextiles2Adjunct TEX-PAC3.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 D 123.4.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 specifiedtime 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-use applications.This testmethod provides an inexpensive alternative for highloft pro-ducers,their suppliers and customers to determine compressionresistance,and recovery properties thus better predicting theirperformance in the finished product.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.64 on Nonwoven Fabrics.Current edition approved September 10,2001.Published December 2001.Originally published as D 657100.Last previous edition D 657100.2Annual Book of ASTM Standards,Vol 07.01.3Annual Book of ASTM Standards,Vol 07.02.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.5.2 Compression resistance and recovery performance re-quirements of highloft nonwovens will vary according to theend-use application.Furniture,bedding apparel,and industrialapplications do not require the same property values to satisfytheir individual consumers.They will require resistance tocompression and the ability to recover to some degree.5.3 Option 1 of this test method is used in the trade for theacceptance testing of commercial shipments.Compressionrecovery graphs from Option 2 can be helpful in comparingperformance of different highloft nonwoven fabrics.5.3.1 In case of a dispute arising from differenc