ASTM D2816-2005 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
【标准状态】:现行
【国别】:
【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】:动物纤维;开士米;含量测定;试验;纺织纤维;纺织材料
【英文主题词】:animalfibers(exceptwool);content
【摘要】:Thistestmethodmaybeusedfordeterminingcompliancewithaspecificationformaximumcashmerecoarse-haircontentandisrequiredtobeusedfordeterminingcompliancewithSpecificationD2817.5.1.1IncaseofadisputearisingfromdifferencesinreportedtestresultswhenusingTestMethodD2816foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent’t-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.Whentheproductbeingtestedhasacashmerecoarse-haircontentthatdepartssignificantlyeitherwayfromthespecifiedamount,thesequentialtestproceduredescribedhereinwillresultinasubstantialreductioninthenumberofobservationsrequiredforadecisionatthestatedlevelofconfidence.Ontheotherhand,whentheproductbeingtestedhasacashmerecoarse-haircontentthatapproachesthespecifiedamount,thesequentialprocedureensuresthatthenecessaryincreasednumberofobservationsshallbemadetosecureacorrectdecisionatthestatedlevelofconfidence.1.1Thistestmethodcoversasequentialprocedurefordeterminingwhetherornotthecashmerecoarse-haircontentofasampleexceedsaspecifiedvalue.Note1Forthemaximumallowablecashmerecoarse-haircontentincashmere,refertoSpecificationD2817.Note2Forthequantitativeanalysisofcashmerehairandblendsofcashmerehairandotherfibers,refertoTestMethodsD629.1.2Thistestmethodisapplicableonlytocashmerehairintheformofroving,yarn,orfabric,andtothecashmerehaircontentofblendswithotherfibers,wheretheexpectedcashmerecoarse-haircontentisnotmorethanfivemasspercent(seeFootnoteCof).Forgreaterexpectedmasspercentagesofcashmerecoarse-hair,seeTestMethodsD629.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W22
【国际标准分类号】:59_060_10
【页数】:3P.;A4
【正文语种】: