ASTM D3882-2008 机织和针织织物中弓纬和纬斜的标准试验方法

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【英文标准名称】:StandardTestMethodforBowandSkewinWovenandKnittedFabrics
【原文标准名称】:机织和针织织物中弓纬和纬斜的标准试验方法
【标准号】:ASTMD3882-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bow;knittedfabric;skew;wovenfabric;Bow/skewness;Fillingyarns;Knittedtextilefabrics;Plaids;Printedgeometricdesigns;Skew;Woventextilefabrics
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipments.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,thetestsamplestobeusedareashomogeneousaspossible,aredrawnfromthematerialfromwhichthedisparatetestresultswereobtained,andarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Otherfabricswithestablishedtestvaluesmaybeusedforthispurpose.Thetestresultsfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsmustbeadjustedinconsiderationoftheknownbias.Individualrollsarenormallyacceptedorrejectedonthebasisofthemaximumamountofboworskewinaspecificrolloffabric.Theaverageboworskewinarollorlotortherangeofboworskewinarollmaybedeterminedbutarenotnormallyusedinthetradeforacceptanceorrejection.Boworskewcanbeinducedduringfabricmanufacturing,dyeing,tentering,finishing,orotheroperationswhereapotentialexistsforunevendistributionoftensionsacrossthefabricwidth.Bowandskewaremorevisuallydispleasingincolored,patternedfabricssuchasplaidsandhorizontalstripesratherthaninsolidcolorsbecausethecontrastmakesthedistortionmoreprominent.Thesedefectsmaycausesewingproblemsinsuchfabricsanddrapingproblemsinfinishedproducts.Insomecases,aspecifiedamountofskewisneeded,forexample,topreventtwistingofpantlegsmadeoftwillfabric.Matchingplaidsfromdistortedpatternsmaycreateseriousproblemsforthegarmentmanufacturerorhomesewer.Wavyorsharpbreaksinthebowlinearemoredetrimentaltotheappearanceofsmallpartsofagarment(suchascollars,pockets,andsoforth)thanagradualslopefromastraightline.5.3.1Automotiveinteriortextilesusedforseatbolsters,cushions,headrestsanddoorpanelsmaybesusceptibletobowandskew,especiallywhenvisuallypatternedfabricsarejoinedormatedtoastraightedgesurface.1.1Thistestmethodcoversthedeterminationofbowandskewoffillingyarnsinwovenfabricsandthecoursesinknittedfabrics.1.2Thistestmethodcanalsobeusedtomeasurethebowandskewofprintedgeometricdesigns.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W60
【国际标准分类号】:59_080_30
【页数】:5P.;A4
【正文语种】:英语