【英文标准名称】:StandardTestMethodsforDegreeofFilamentYarnEntanglementbyNeedleInsertionMethods
【原文标准名称】:用针入法测试线纱缠结度的标准试验方法
【标准号】:ASTMD4724-1999(2005)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:
【英文主题词】:entanglement;yarn
【摘要】:Option1ofthistestmethodforthedeterminationofthedegreeoffilamentyarnentanglement,asmeasuredinstrumentally,isusedforacceptancetestingofcommercialshipments;however,cautionisadvisedbecauseinformationonbetween-laboratoryprecisionislacking.Comparativetests,asdirectedin5.1.1,maybeadvisable.5.1.1Iftherearedifferencesofpracticalsignificancebetweenthereportedtestresultsfortwoormorelaboratories,comparativetestsshouldbeperformedbythoselaboratoriestodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,samplesusedforeachcomparativetestshouldbeashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultsindisparateresultsduringinitialtesting,andrandomlyassignedinequalnumberstoeachlaboratory.Otherfabricswithestablishedtestvaluesmaybeusedforthispurpose.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedappropriatestatisticalanalysisandaprobabilitylevelchosenbythetwopartiesbeforetestingbegins,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorfuturetestresultsmustbeadjustedinconsiderationoftheknownbias.Option2forthistestmethodisintendedforusewhenthesupplyofyarnislimited.Theinstrumentaloptionofthistestmethodisbasedonthetotalrandomizationoftheentanglementsintheyarn;therefore,thedistancemeasuredbetweenthepointofinsertionofapininthemiddleoftheyarnandthepointatwhichanentanglementisencountered,bymovementoftheyarnorthepinuntilitisstoppedatapresetlevelofforce,isrepresentativeofthedistancebetweentwoentanglementsatsomelocationintheyarn.Entanglementsareusedfrequentlyinsteadoftwisttoensuretheintegrityoffilamentyarns.Suchentanglementsgenerallygivesomewhatlessprotectionduringweavingorknittingthantwist,butwithpropercare,willperformquitesatisfactorily.1.1Thistestmethodcoverstwooptionsforthemeasurementofentanglementsinfilamentyarnsusingneedleinsertionoptionsforinstrument(A)andmanual(B)techniques.1.2ThevaluesstatedineitherSIorinch-poundunits(inparentheses)aretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheotherwithoutcombiningvaluesinanyway.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:6P.;A4
【正文语种】:
基本信息
标准名称: | 钛及钛合金化学分析方法 硫酸亚铁铵容量法测定铬量(含钒) |
中标分类: |
冶金 >>
金属化学分析方法 >>
稀有金属及其合金分析方法 |
替代情况: | 被GB/T 4698.10-1996代替 |
发布日期: | |
实施日期: | 1985-08-01 |
首发日期: | |
作废日期: | |
出版日期: | |
页数: | 3页 |
适用范围
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所属分类: 冶金 金属化学分析方法 稀有金属及其合金分析方法