ASTM D2816-2005(2009) 开士米毛线中粗毛节含量的标准试验方法

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【英文标准名称】:StandardTestMethodforCashmereCoarse-HairContentinCashmere
【原文标准名称】:开士米毛线中粗毛节含量的标准试验方法
【标准号】:ASTMD2816-2005(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:D13.13
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:animalfibers(exceptwool);content;Animalfibers;Cashmere;Microprojection
【摘要】:Thistestmethodmaybeusedfordeterminingcompliancewithaspecificationformaximumcashmerecoarse-haircontentandisrequiredtobeusedfordeterminingcompliancewithSpecificationD2817.IncaseofadisputearisingfromdifferencesinreportedtestresultswhenusingTestMethodD2816foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.Whentheproductbeingtestedhasacashmerecoarse-haircontentthatdepartssignificantlyeitherwayfromthespecifiedamount,thesequentialtestproceduredescribedhereinwillresultinasubstantialreductioninthenumberofobservationsrequiredforadecisionatthestatedlevelofconfidence.Ontheotherhand,whentheproductbeingtestedhasacashmerecoarse-haircontentthatapproachesthespecifiedamount,thesequentialprocedureensuresthatthenecessaryincreasednumberofobservationsshallbemadetosecureacorrectdecisionatthestatedlevelofconfidence.1.1Thistestmethodcoversasequentialprocedurefordeterminingwhetherornotthecashmerecoarse-haircontentofasampleexceedsaspecifiedvalue.Note18212;Forthemaximumallowablecashmerecoarse-haircontentincashmere,refertoSpecificationD2817.Note28212;Forthequantitativeanalysisofcashmerehairandblendsofcashmerehairandotherfibers,refertoTestMethodsD629.1.2Thistestmethodisapplicableonlytocashmerehairintheformofroving,yarn,orfabric,andtothecashmerehaircontentofblendswithotherfibers,wheretheexpectedcashmerecoarse-haircontentisnotmorethanfivemasspercent(seeFootnoteCofTable1).Forgreaterexpectedmasspercentagesofcashmerecoarse-hair,seeTestMethodsD629.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.TABLE1SequentialAccept-RejectNumbersforSelectedSpecificationsANumberofFi-bersCountedSpecification,Length%B0.20.30.40.5