【英文标准名称】:StandardTestMethodforOpenCellContentofRigidCellularPlastics
【原文标准名称】:硬质泡沫塑料的开孔含量的标准试验方法
【标准号】:ASTMD6226-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:cellwall;cellularplastics;closedcell;opencell;pycnometer;Cellularplastics;Cellwall;Closedcell;Opencellcontent;Pycnometer/pycnometry
【摘要】:Thistestmethodisintendedtobeusedinspecificationswhereporosityofcellularplasticshasadirectbearingontheirenduse.Forexample,forthermalinsulationapplications,ahighpercentageofclosedcellsisnecessarytopreventescapeofgasesandtopromotelowthermalconductivity.Inflotationapplications,highclosed-cellcontentgenerallyreduceswaterabsorption.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,ordimensions,orboth,andtestingparameterscoveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1Thistestmethodcoverscellularplastics,whicharecomposedofmembranesorwallsofpolymerseparatingsmallcavitiesorcells.Thesecellsmaybeinterconnecting(opencell),non-connecting(closedcell),oranycombinationofthesetypes.Thistestmethoddeterminesnumericalvaluesforopencells.Itisaporositydetermination,measuringtheaccessiblecellularvolumeofamaterial.Theremainingvolumeisthatoccupiedbyclosedcellsandcellwalls.Sinceanyconvenientlysizedspecimencanonlybeobtainedbysomecuttingoperation,afractionoftheclosedcellswillbeopenedbyspecimenpreparationandwillbeincludedasopencells,(seeNote2).1.2Thistestmethodprovidesgoodaccuracyonpredominantlyhighlyopen-celledmaterials.Bynotaccountingforclosedcellsthatwereopenedduringspecimenpreparation,theaccuracydecreasesastheclosedcellcontentincreasesandasthecellsizeincreases.1.3ThevaluesasstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesaregivenforreferenceonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThistestmethodandISO4590usethesamebasicprinciplesbutaresignificantlydifferentinexperimentaldetail.Note28212;TwoproceduresforcorrectingforcellsopenedduringspecimenpreparationaredescribedinAppendixX1.1.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:7P.;A4
【正文语种】:英语