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1、Designation:D5736–95(Reapproved2001)StardTestMethodfThicknessofHighloftNonwovenFabrics1ThisstardisissuedunderthefixeddesignationD5736thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofr

2、evisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon(e)indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethoddescribesthemeasurementofthicknessofhighlof

3、tnonwovenfabrics.FthicknessofnonwovenfabricsotherthanhighloftseeTestMethodD5729.1.2ThevaluesstatedinSIunitsaretoberegardedasthestard.Theinchpoundunitsgiveninparenthesesmaybeapproximate.1.3Thisstarddoesnotpurpttoaddressal

4、lofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:

5、D123TerminologyRelatingtoTextiles2D1776PracticefConditioningTextilesfTesting2D1777TestMethodfMeasuringThicknessofTextileMaterials2D2904PracticefInterlabatyTestingofaTextileTestMethodthatProducesNmallyDistributedData3D572

6、9TestMethodfThicknessofNonwovenFabrics33.Terminology3.1Definitions:3.1.1highloftnonwovenfabricn—alowdensityfiberwkstructureacterizedbyahighratioofthicknesstomassperunitarea.(Syn.highloft).3.1.2nonwovenfabricn—atextilestr

7、uctureproducedbybondinginterlockingoffibersbothaccomplishedbymechanicalchemicalthermalsolventmeanscombinationthereof.3.1.3pressuren—thefceperunitarea.3.1.3.1Discussion—Pressuremaybeexpressedinanyappropriatespecifiedunits

8、suchaspals(Pa)newtonspersquaremetre(Nm2)poundfcepersquareinch(psi).3.1.4thicknessn—thedistancebetweenonesurfaceitsopposite.3.1.4.1Discussion—Intextilesthedistancebetweentheupperlowersurfacesofthematerialmeasuredunderaspe

9、cifiedpressure.Thicknessisusuallydeterminedasthedistancebetweenananvilbaseapresserfootusedtoapplythespecifiedpressure.3.1.5FdefinitionsofothertextiletermsusedinthistestmethodrefertoTerminologyD123.4.SummaryofTestMethod4.

10、1Thethicknessofahighloftnonwovenfabricisdeterminedbyobservingthelineardistancethatamovableplaneisdisplacedfromaparallelsurfacebythespecimenwhileunderaspecifiedpressure.5.SignificanceUse5.1Thistestmethodisusedinthetradefa

11、cceptancetestingofcommercialshipmentshowevercomparativetestsasdirectedin5.1.1maybeadvisable.5.1.1Incaseofadisputearisingfromdifferencesinreptedtestresultswhenusingthistestmethodfacceptancetestingofcommercialshipmentsofno

12、nwovenfabricsthepurchaserthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlabatories.Competentstatisticalassistanceisrecommendedftheinvestigationofbias.Asaminimumthetwopartiesshould

13、takeagroupoftestspecimensthatareashomogeneousaspossiblethatarefromalotofmaterialofthetypeinquestion.Testspecimensshouldthenberomlyassignedinequalnumberstoeachlabatyftesting.Theaverageresultsfromthetwolabatiesshouldbecomp

14、aredusingtheappropriatestudent’sttestanacceptableprobabilitylevelchosenbythetwopartiesbefetestingisbegun.Ifabiasisfoundeitheritscausemustbefoundcrectedthepurchaserthesuppliermustagreetointerpretfuturetestresultswithconsi

15、derationtotheknownbias.5.2Thicknessisoneofthebasicphysicalpropertiesofhighloftnonwovenfabrics.Incertainindustrialapplicationsthethicknessmayrequirerigidcontrolwithinspecifiedlimits.Bulkwarmthpropertiesofhighloftnonwovenf

16、abricsareoftenestimatedfromtheirthicknessvaluesthicknessisalsousefulinmeasuringperfmanceacteristicssuchasbefeafterabrasionshrinkage.1ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextilesisthedirectresponsibili

17、tyofSubcommitteeD13.64onNonwovenFabric.CurrenteditionapprovedJune151995.PublishedSeptember1995.2AnnualBookofASTMStardsVol07.01.3AnnualBookofASTMStardsVol07.02.1Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestCons

18、hohockenPA194282959UnitedStates.in.)asreaddirectlyfromthedatacollectionsystemunlessotherwisespecifiedinamaterialspecificationcontractder.10.2AverageValues—Calculatetheaveragethicknessfeachofthelabatysampleunitsthelot.10.

19、3StardDeviationCoeff?cientofVariation—Calculatewhenrequested.11.Rept11.1Reptthatthethicknesswasdeterminedasdirectedinthistestmethod.Describethematerialproductsampledthemethodofsamplingused.11.2Reptthefollowinginfmationfb

20、oththelabatysamplingunitthelotasapplicabletoamaterialspecificationcontractder:11.2.1Thickness11.2.2Whencalculatedthestarddeviationthecoefficientofvariation11.2.3Anymodificationofthetestmethod.12.PrecisionBias12.1Summary—

21、Interlabatytestdatahaveshownthatthevarianceinthicknesstestingisdependentuponthenominalthicknessofthematerialunderevaluationtherefenogeneralstatementcanbemadeconcerningleastcriticaldifferences.Thefollowingdataweregenerate

22、dduringtheinterlaboratytestarepresentedfreference.Incomparingtwoaveragesoffiveobservationsthedifferencebetweenaveragesshouldnotexceedthefollowingvaluesin95outof100caseswhenalltheobservationsaretakenbythesamewelltrainedop

23、eratusingthesamepieceofequipmentspecimensareromlydrawnfromthesamesamplehavinganominalthicknessintherangeindicated:NominalThicknessmmThicknessmm6.35to12.700.2512.70to25.400.5325.40to63.501.3763.50to101.602.39Largerdiffere

24、ncesarelikelytooccurunderallothercircumstances.12.2InterlabatyTestData5—Aninterlabatytestwasrunin1992inwhichromlydrawnsamplesofsixmaterialsweretestedineachoffivelabaties.Twooperatsineachlabatytestedfivespecimensofeachmat

25、erial.Thesixmaterialsusedinthisevaluationwereresinbondedpolyesterhighloftnonwovensproducedatnominalthicknessesof:6.35mm(0.250in.)12.70mm(0.500in.)19.05mm(0.750in.)38.1mm(1.500in.)69.85mm(2.750in.)101.60mm(4.000in.).Dataw

26、ascollectedininchpoundunitsasshownintheresearchrepttheresultsofstatisticalanalysiswerethenconvertedtoSIunitsfinclusioninthistestmethod.AnalysisofthedatausingtheadjuncttoPracticeD2904suggestedgroupingofthematerialsbasedon

27、residualvariances.ThecomponentsofvarianceexpressedasstarddeviationsfeachgrouparelistedinTable2(seeNote3).12.3Precision—FthecomponentsofvariancelistedinTable2theaverageoftwoobservedvaluesshouldbeconsideredsignificantlydif

28、ferentatthe95%probabilitylevelifthedifferenceequalsexceedsthecriticaldifferenceslistedinTable3(seeNote4).12.4Bias—Theprocedureinthistestmethodfdeterminingthethicknessofhighloftnonwovenfabricshasnotbeencheckedagainstaccep

29、tedreferencematerialsbutcontainsnoknownbiasotherthantheeffectofnominalthicknessasnoted.Thistestmethodisacceptedasarefereemethod.NOTE3—ThesquarerootsofthecomponentsofvariancearelistedinTable2sothatthevariabilityisexpresse

30、dintheappropriateunitsofmeasureratherthanasthesquareofthoseunitsofmeasure.NOTE4—Thevaluesofthetabulateddifferencesshouldbeconsideredtobeageneralstatementparticularlywithrespecttobetweenlabatyprecision.Befeameaningfulstat

31、ementcanbemadeabouttwospecificlabatiestheamountofstatisticalbiasifanybetweenthemmustbeestablishedwitheachcomparisonbeingbasedonrecentdataobtainedonspecimenstakenfromalotofmaterialofthetypebeingevaluatedsoastobeashomogene

32、ousaspossiblethenromlyassignedinequalnumberstoeachofthelabaties.13.Keywds13.1nonwovenfabricthicknessTABLE2ComponentsofVarianceasStardDeviationsNOTE1—Thicknessexpressedinmillimetres.NominalThicknessRangeSingleOperatCompon

33、entWithinLabatyComponentBetweenLabatyComponent6.35to12.700.2000.2012.70to25.400.4301.0725.40to63.501.0901.4563.50to101.601.9300.71TABLE3CriticalDifferencesfConditionsNoted95%ProbabilityLevelNOTE1—Thicknessexpressedinmill

34、imetres.NominalThicknessRangeObservationsinEachAverageSingleOperatPrecisionWithinLabatyPrecisionBetweenLabatyPrecision6.35to12.7010.560.560.7950.250.250.61100.180.180.5812.70to25.4011.191.193.1850.530.532.97100.380.382.9

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