ISO 812硫化橡胶或热塑性橡胶--低温脆性的测定
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橡塑低温脆性测定仪(普通型)
ISO812硫化橡胶或热塑性橡胶--低温脆性的测定ThisInternationalStandardspecifiesamethodfordeterminingthelowesttemperatureatwhichrubbermaterialsdonotexhibitbrittlefailureorthetemperatureatwhichhalfofthetestpiecesusedinatestfailwhenimpactedunderspecifiedconditions.Thetemperaturesthusdetermineddonotnecessarilyrelatetothelowesttemperatureatwhichthematerialcanbeusedsincethebrittlenesswillbeaffectedbytheconditionsoftestandespeciallybytherateofimpact.Dataobtainedbythismethod首ld,therefore,beusedtopredictthebehaviourofrubbersatlowtemperaturesonlyinapplicationsinwhichtheconditionsofdeformationaresimilartothosespecifiedinthetest.Threeproceduresaredescribed:procedureA,inwhichthebrittlenesstemperatureisdetermined;procedureB,inwhichthebrittlenesstemperaturefor50%failureisdetermined;procedureC,inwhichthetestpieceisimpactedataspecifiedtemperature.ProcedureCisusedintheclassificationofrubbermaterialsandforspecificationpurposes.NOTEAsimilartestforrubber-coatedfabricsisdescribedinISO4646,Rubber-orplastics-coatedfabricsLow-temperatureimpacttest.
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