ASTM D6720-2007 评估弹力丝(绞纱样品)可复原弹性用标准试验方法
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【英文标准名称】:StandardTestMethodforEvaluationofRecoverableStretchofStretchYarns(SkeinMethod)
【原文标准名称】:评估弹力丝(绞纱样品)可复原弹性用标准试验方法
【标准号】:ASTMD6720-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:评估;试验方法;纱线
【英文主题词】:crimp;elastomericyarns;recoverablestretch;stretchyarns;texturedyarncrimp;elastomericyarns;recoverablestretch;stretchyarns;texturedyarns
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsbecausecurrentestimatesofbetween-laboratoryprecisionareacceptableandthemethodisusedextensivelyinthetradeforacceptancetesting.5.1.1Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,usesamplesforsuchcomparativeteststhatareashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtesting,andrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifbiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Thistestdiffersfromothercrimpcontractiontestmethodsinthatitmeasurestherecoverablestretchduringtheunloadcycleoftheyarn.1.1Thistestmethodcoversthedeterminationoftherecoverablestretchofcommercialtexturedyarns,coveredelastomericyarnsandotherstretchyarnsusingskeins.Thistestmethodisparticularlyvaluableforyarnsthatdevelopadditionalcrimpuponexposuretohot,wetconditions.Therecoverablestretchisarelativemeasureoftherecoverypowertheyarncanbeexpectedtoprovideinafinishedfabric.1.2Thistestmethodisapplicabletocontinuousfilamentyarnsandissuitableforyarnsthatdevelopadditionalstretchpotentialuponexposuretoheat.1.3Thismethodisapplicabletoyarns500denierorfiner.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:3P.;A4
【正文语种】:
【原文标准名称】:评估弹力丝(绞纱样品)可复原弹性用标准试验方法
【标准号】:ASTMD6720-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:评估;试验方法;纱线
【英文主题词】:crimp;elastomericyarns;recoverablestretch;stretchyarns;texturedyarncrimp;elastomericyarns;recoverablestretch;stretchyarns;texturedyarns
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsbecausecurrentestimatesofbetween-laboratoryprecisionareacceptableandthemethodisusedextensivelyinthetradeforacceptancetesting.5.1.1Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,usesamplesforsuchcomparativeteststhatareashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtesting,andrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifbiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Thistestdiffersfromothercrimpcontractiontestmethodsinthatitmeasurestherecoverablestretchduringtheunloadcycleoftheyarn.1.1Thistestmethodcoversthedeterminationoftherecoverablestretchofcommercialtexturedyarns,coveredelastomericyarnsandotherstretchyarnsusingskeins.Thistestmethodisparticularlyvaluableforyarnsthatdevelopadditionalcrimpuponexposuretohot,wetconditions.Therecoverablestretchisarelativemeasureoftherecoverypowertheyarncanbeexpectedtoprovideinafinishedfabric.1.2Thistestmethodisapplicabletocontinuousfilamentyarnsandissuitableforyarnsthatdevelopadditionalstretchpotentialuponexposuretoheat.1.3Thismethodisapplicabletoyarns500denierorfiner.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:3P.;A4
【正文语种】:
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