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【英文标准名称】:Ageingofthermalinsulationmaterials-Determinationofthelong-termchangeinthermalresistanceofclosed-cellplastics(acceleratedlaboratorytestmethods)
【原文标准名称】:绝热材料老化闭孔泡沫塑料热阻的长期变化测定(实验室加速法)
【标准号】:ISO11561-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-07
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC163
【标准类型】:()
【标准水平】:()
【中文主题词】:隔热;实验室试验;定义;测定;建筑物;热阻;老化试验;绝热材料;热力学性质;加速度试验
【英文主题词】:Acceleratedtesting;Ageingtests;Buildings;Definitions;Determination;Laboratorytesting;Plastics;Thermalinsulatingmaterials;Thermalinsulation;Thermalresistance;Thermodynamicproperties
【摘要】:ThisInternationalStandardspecifiestwolaboratorytestmethods,basedonslicingandscalingtechniques,todeterminethelong-termchangesinthethermalresistanceofclosed-cell(normally90%)cellularplasticmaterialsthatcontaingaseswhich,throughdiffusionprocesses,affectthepropertiesofafoamwithtime.Usingstandardmethodsforthemeasurementofthermalresistance,methodAconsistsofperiodicmeasurementsperformedoverashorttimeintervalonthinspecimensconditionedinacontrolledambienttemperatureenvironment.Theresultsofrelativechangewithtimeareusedinconjunctionwithamathematicaltechniquetoderivethethermalresistanceofgreaterthicknessesofthematerialasafunctionoftime.MethodBdescribesasimpletesttodetermineaconservativedesignlife-timevalue(25yearsandlonger)foranunfaced,closed-cell,cellularplasticproduct.Thismethodislimitedcurrentlytounfacedhomogeneousmaterials.Forthismethod,multiplespecimensofthecoreandsurfacesofmaterialswithvariationsintheslopeoftheprimarystagethermalresistivityandatimerelationshipoflessthan10%withinasampleareconsideredtobehomogeneous.Generally,productswithnaturalskinsorwithdensitydeviationsnormallyfoundwithsuchproductsmaybeconsideredacceptablefortestbythistechnique.
【中国标准分类号】:Q25
【国际标准分类号】:91_100_60
【页数】:19P.;A4
【正文语种】:英语