ASTM D1447-2007 用光电测量棉纤维的长度和长度均匀度的标准试验方法

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【英文标准名称】:StandardTestMethodforLengthandLengthUniformityofCottonFibersbyPhotoelectricMeasurement
【原文标准名称】:用光电测量棉纤维的长度和长度均匀度的标准试验方法
【标准号】:ASTMD1447-2007
【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】:D13.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:棉花;长度;线性测量;测试;纺织纤维;纺织材料
【英文主题词】:cotton;length;Cottonfabrics/fibers;Fiberlength;Fibrographmethod
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingwhenthelevelsofthelaboratoriesarecontrolledbytheuseofthesamereferencestandardcottonsamplesbecausethecurrentestimatesofbetween-laboratoryprecisionareacceptableundertheseconditions.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,ensurethetestsamplestobeusedareashomogeneousaspossible,aredrawnfromthematerialfromwhichthedisparatetestresultswereobtained,andarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Thetestfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Fibrographmeasurementsprovidearelativelyfastmethodfordeterminingthelengthandlengthuniformityofthefibersinasampleofcottoninareproduciblemanner.ResultsoftheFibrographlengthtestsdonotnecessarilyagreewiththoseobtainedbyothermethodsformeasuringlengthsofcottonfibersbecauseoftheeffectoffibercrimpandotherfactors.Fibrographtestsaremoreobjectivethancommercialstaplelengthclassificationsandalsoprovideadditionalinformationonfiberlengthuniformityofcottonfibers.Thecottonqualityinformationprovidedbytheseresultsisusedinresearchstudiesandqualitysurveys,incheckingcommercialstaplelengthclassifications,inassemblingbalesofcottonintouniformlots,andforotherpurposes.Fibrographmeasurementsarebasedontheassumptionsthatafiberiscaughtrandomlyalongitslength.1.1Thistestmethodcoversthemeasurementofthelengthandlengthuniformityofcottonfibersbyuseofphotoelectricmeasurement.Thetestmethodisapplicabletofiberstakenfromraworpartiallyprocessedcotton(uptocardmat)orsometypesofcottonwaste,butnottofibersfromblendsofcottonwithotherfibersortofibersrecoveredfromcottonyarns,fabricsorto100%systheticfibers.1.2ThistestmethodisespeciallyadaptedfordeterminingthelengthandlengthuniformityofcottonfibersbymodelsoftheDigitalFibrograph,hereafterreferredtoasFibrograph.Note18212;InstructionsfortheuseofManualandServoFibrographModelswereincludedinthetextofTestMethodD1447in1971andpreviouseditions.Note28212;ForothermethodscoveringthemeasurementofthelengthofcottonfibersrefertoTestMethodD1440.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:59_060_10(NATURALFIBRES)
【页数】:6P.;A4
【正文语种】: