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【英文标准名称】:Plastics-Determinationofburningbehaviourbyoxygenindex-Part2:Ambient-temperaturetest
【原文标准名称】:塑料通过氧指数测定其燃烧性第2部分:室温试验
【标准号】:ISO4589-2-1996
【标准状态】:现行
【国别】:国际
【发布日期】:1996-07
【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/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:氧指数;易燃性;定义;试验;燃烧试验;塑料
【英文主题词】:Ambienttemperature;Burningbehaviours;Burningtests;Combustion;Concentration;Definitions;Determination;Determinationprocedures;Firetests;Flammability;High-temperaturetechniques;High-temperaturetesting;Materials;Oxygen;Oxygenconcentration;Oxygenindex;Physicaltesting;Plasticfilms;Plastics;Surfacespreadofflame;Temperature;Testequipment;Testperformance;Testing
【摘要】:ThispartofISO4589specifiesmethodsfordeter-miningtheminimumconcentrationofoxygen,inad-mixturewithnitrogen,thatwillsupportcombustionofsmallverticaltestspecimensunderspecifiedtestconditions.Theresultsaredefinedasoxygenindexvalues.Methodsareprovidedfortestingmaterialsthatareself-supportingintheformofverticalbarsorsheetupto10,5mmthick.Thesemethodsaresuitableforsolid,laminatedorcellularmaterialscharacterizedbyanapparentdensitygreaterthan100kg/m.Themethodsmayalsobeapplicabletosomecellularma-terialshavinganapparentdensityoflessthan100kg/m.Amethodisprovidedfortestingflexiblesheetorfilmmaterialswhilesupportedvertically.Forcomparativepurposes,aprocedureisprovidedfordeterminingwhetherornottheoxygenindexofamaterialliesabovesomespecifiedminimumvalue.OxygenindexresultsobtainedusingthemethodsdescribedinthispartofISO4589canprovideasen-sitivemeasureoftheburningcharacteristicsofma-terialsundercertaincontrolledlaboratoryconditions,andhencemaybeusefulforqualitycontrolpurposes.Theresultsobtainedaredependentupontheshape,orientationandisolationofthetestspecimenandtheconditionsofignition.Forparticularmaterialsorappli-cations,itmaybenecessaryorappropriatetospecifydifferenttestconditions.Resultsobtainedfromtestspecimensofdifferingthicknessorbyusingdifferentignitionproceduresmaynotbecomparableandnocorrelationwithflammabilitybehaviourunderotherfireconditionsisimplied.ResultsobtainedinaccordancewiththispartofISO4589-2mustnotbeusedtodescribeorappraisethefirehazardpresentedbyaparticularmaterialorshapeunderactualfireconditions,unlessusedasoneelementofafireriskassessmentthattakesintoac-countallofthefactorspertinenttotheassessmentofthefirehazardofaparticularapplicationforthematerial.NOTES1Itmaynotbepossibletoapplythesemethodssatisfac-torilytomaterialsthatexhibithighlevelsofshrinkagewhenheated,e.g.highlyorientedthinfilm.2Forassessingtheflamepropagationpropertiesofcellu-larmaterialsofdensity<100kg/m,attentionisdrawntothemethodofISO3582:1978,Cellularplasticandcellularrubbermaterials—Laboratoryassessmentofhorizontalburningcharacteristicsofsmallspecimenssubjectedtoasmallflame,fortestinghorizontalburningcharacteristics.
【中国标准分类号】:G31
【国际标准分类号】:13_220_40;83_080_01
【页数】:21P.;A4
【正文语种】:英语