【英文标准名称】:StandardTestMethodforPredictingLong-TermThermalResistanceofClosed-CellFoamInsulation
【原文标准名称】:闭室泡沫塑料绝缘的长期热阻预测用标准试验方法
【标准号】:ASTMC1303-2007
【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(ASTM)
【起草单位】:C16.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:变化;泡沫塑料;长期的;硬质泡沫塑料;试验;热阻;时间
【英文主题词】:aging;long-termthermalresistance;LTTR;rigidclosed-cellplasticfoams;scalingfactors;thermalinsulation;thermalresistance;time-averagedthermalresistance;
【摘要】:1.1Thistestmethodcoversaprocedureforpredictingthelong-termthermalresistance(LTTR)ofunfacedorpermeablyfacedrigidgas-filledclosed-cellfoaminsulationsbyreducingthespecimenthicknesstoaccelerateagingundercontrolledlaboratoryconditions().1.2Rigidgas-filledclosed-cellfoaminsulationincludesallcellularplasticinsulationsmanufacturedwiththeintenttoretainablowingagentotherthanair.1.3Thistestmethodislimitedtounfacedorpermeablyfaced,homogeneousmaterials.Thismethodisappliedtoawiderangeofrigidclosed-cellfoaminsulationtypes,includingbutnotlimitedto:extrudedpolystyrene,polyurethane,polyisocyanurate,andphenolic.Thistestmethoddoesnotapplytoimpermeablyfacedrigidclosed-cellfoamsortorigidclosed-cellbunstockfoams.Note1SeeNote0formoredetailsregardingtheapplicabilityofthistestmethodtorigidclosed-cellbunstockfoams.1.4Thistestmethodutilizesreferencedstandardtestproceduresformeasuringthermalresistance.Periodicmeasurementsareperformedonspecimenstoobservetheeffectsofaging.Specimensofreducedthickness(thatis,thinslices)areusedtoshortenthetimerequiredfortheseobservations.Theresultsofthesemeasurementsareusedtopredictthelong-termthermalresistanceofthematerial.1.5Thetestmethodisgivenintwoparts.ThePrescriptiveMethodinPartAprovideslong-termthermalresistancevaluesonaconsistentbasisthatcanbeusedforavarietyofpurposes,includingproductevaluation,specifications,orproductcomparisons.TheResearchMethodinpartBprovidesageneralrelationshipbetweenthermalconductivity,age,andproductthickness.1.5.1TousethePrescriptiveMethod,thedateofmanufacturemustbeknown,whichusuallyinvolvesthecooperationofthemanufacturer.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundvaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G32
【国际标准分类号】:83_100;83_100
【页数】:17P.;A4
【正文语种】:


MIL-STD-1285D (W/ CHANGE 1), DEPARTMENT OF DEFENSESTANDARD PRACTICE: MARKING OF ELECTRICAL AND ELECTRONIC PARTS (10 NOV 2010)., This standard establishes requirements for the physical marking of electrical and electronic parts. This standard should be implemented by incorporating suitable requirements directly in acquisition documents.