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【英文标准名称】:StandardTestMethodsforWaterVaporDiffusionResistanceandAirFlowResistanceofClothingMaterialsUsingtheDynamicMoisturePermeationCell
【原文标准名称】:使用动态透湿单元法测试布质材料耐水蒸气扩散性和耐气流性的标准试验方法
【标准号】:ASTMF2298-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:F23.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airflowresistance;dynamicmoisturepermeationcell;watervapordiffusion;watervapordiffusionresistance;watervaporflux;watervaportransmissionrate
【摘要】:Thewatervaportransportpropertiesoftextilematerialsareofconsiderableimportanceindeterminingthecomfortpropertiesofclothingsystems.Watervaportransportthroughporoustextilesmayoccurduetobothdiffusion(drivenbyvaporconcentrationdifferences)andconvection(drivenbygaspressuredifferences).Forairpermeableporousmaterials,averysmallpressuregradientcanproducelargeconvectiveflowsthroughtheporesinthestructure.Inmanystandardwatervaporpermeabilitytestmethods,whenusedformaterialswithhighairpermeability,slightvariationsinpressuregradientacrossaspecimenwillgreatlyinfluencethemeasuredwatervaportransportproperties.Therefore,thewatervaportransportpropertiesoftheporousandnon-poroustextilematerialscannotbedirectlycomparedwhenthemethodhasnoprovisionforcontrollingthepressuregradient.Thistestmethoddeterminesthediffusionandconvectionpropertiesfromthesametestandgeneratesdatathatallowsdirectcomparisonoftheresultsobtainedbetweenmaterials.1.1Thistestmethodcoversthemeasurementofthemoisturevaportransportandgasflowpropertiesoffabrics,membranes,andmembranelaminatesusedforprotectivematerials.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:61_020
【页数】:10P.;A4
【正文语种】: