【英文标准名称】:StandardTestMethodforBrittlenessTemperatureofPlasticsandElastomersbyImpact
【原文标准名称】:用冲击法测定塑料及弹性材料的脆化温度的标准试验方法
【标准号】:ASTMD746-2007
【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(US-ASTM)
【起草单位】:D20.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:脆化;弹性材料;冲击试验;塑料;密封件;测试;轮胎
【英文主题词】:brittlefailure;brittlenesstemperature;elastomer;impactplastics
【摘要】:Thistestmethodestablishesthetemperatureatwhich50%ofthespecimenstestedfailwhensubjectedtotheconditionsspecifiedherein.Thetestprovidesfortheevaluationoflong-timeeffectssuchascrystallization,orthoseeffectsthatareintroducedbylow-temperatureincompatibilityofplasticizersinthematerialundertest.Plasticsandelastomersareusedinmanyapplicationsrequiringlow-temperatureflexingwithorwithoutimpact.Usedataobtainedbythismethodtopredictthebehaviorofplasticandelastomericmaterialsatlowtemperaturesonlyinapplicationsinwhichtheconditionsofdeformationaresimilartothosespecifiedinthistestmethod.Thistestmethodhasbeenfoundusefulforspecificationpurposes,butdoesnotnecessarilymeasurethelowesttemperatureatwhichthematerialissuitableforuse.FIG.1DimensionalRequirementsBetweenSpecimenClampandStrikingEdge(TypeA)FIG.2TypicalClamp(TypeA)Note8212;Dimensionsareinmillimetres.FIG.3DimensionalDetailsofStrikingEdgeandClampingDevice,TypeB(PositioningofUnnotchedTestSpecimen)FIG.4AssembledClampwithTestSpecimens,TypeB1.1Thistestmethodcoversthedeterminationofthetemperatureatwhichplasticsandelastomersexhibitbrittlefailureunderspecifiedimpactconditions.Tworoutineinspectionandacceptanceproceduresarealsoprovided.Note18212;WhentestingrubbersforimpactbrittlenessuseTestMethodsD2137.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Duetothepotentialsafetyandenvironmentalhazardsassociatedwithmercury-filledthermometers,theuseofalternativetemperaturemeasuringdevices(suchasthermocouplesandRTDs)isencouraged.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note28212;ThistestmethodandISO974(E)aretechnicallyequivalentwhenusingtheTypeBfixtureandtheTypeIIIspecimen,however,theminimumnumberofspecimensthatarerequiredtobetestedissignificantlydifferentwhenusingthistestmethod.TheISOmethodrequiresthataminimumof100specimensbetested.
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:


【英文标准名称】:Safetyofhouseholdandsimilarelectricalappliances-Part1:generalrequirements.
【原文标准名称】:家用和类似用途电器的安全.第1部分:一般要求
【标准号】:NFC73-800-1995
【标准状态】:现行
【国别】:法国
【发布日期】:1995-05-01
【实施或试行日期】:1995-05-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:一般条件;耐火性;家用电器;家用电器;介电强度;电动机;防电击;材料力学性能;防火安全;家庭安全;接线端;加热器;火灾危险;螺钉;安全措施;抗湿;加热条;组件;材料强度;跟踪系数;设备安全;家用的;容许的;安全工程;保护(装置);检验;安全要求;试验;规范(验收);电气器具;家用;试验条件;热稳定性;安全;家用设备;连接;电气安全;常规检验;电气元件;电气工程;电气设备;(电网)电源;接地导线;定义;电缆
【英文主题词】:mechanicalbehaviourofmaterials;generalconditions;safetyengineering;safetyrequirements;electricalappliances;electricalengineering;screws(bolts);strengthofmaterials;definitions;electricappliances;fireresistance;electricalsafety;domesticsafety;householdequipment;protection;electriccables;electricmains;equipmentsafety;firesafety;protectionagainstelectricshocks;firerisks;electricalhouseholdappliances;heaters;testingconditions;safetymeasures;definition;routinechecktests;safety;thermalstability;dielectricstrenght;components;connections;specification(approval);trackingindex;inspection;firebars;permissible;householduse;moistureresistance;testing;electrichouseholdappliances;motors;domestic;earthconductors;electricterminals;electricalcomponents;electrichouseholdappliance
【摘要】:
【中国标准分类号】:Y60
【国际标准分类号】:97_030
【页数】:136P.;A4
【正文语种】:其他