ASTM D4226-2010 刚性聚(氯乙烯)建筑产品的耐撞击性能的标准试验方法

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【英文标准名称】:StandardTestMethodsforImpactResistanceofRigidPoly(VinylChloride)(PVC)BuildingProducts
【原文标准名称】:刚性聚(氯乙烯)建筑产品的耐撞击性能的标准试验方法
【标准号】:ASTMD4226-2010
【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】:D20.24
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:brittlefailureenergy;buildingproducts;failureenergy;fallingweight;impacttest;Impactresistance--plastics;Impacttesting--plastics;Plasticsheetandfilm;Rigidplastics
【摘要】:Theimpactstrengthvaluesobtainedontheflatsectionsofabuildingproductprofilearerelevantonlytotheflatsectionthathasbeentestedandthesevaluesdonotnecessarilyindicatetheimpactresistanceofthewholeproduct,whichisaffectedbytheconfigurationoftheprofile(thatis,corners,ribs,etc).Constantweightandvariableheight,employedinthesetestmethods,allowthevelocityofimpacttovaryand,therefore,byProcedureB,candeterminetheenergyofductile-to-brittletransition,whichcannotbedeterminedifavariableweightisdroppedfromaconstantheight.Thesetestprocedureshavebeenfoundtobeusefulelementsinrigidpoly(vinylchloride)(PVC)buildingproductcharacterization.Compoundqualification,finishedproductqualitycontrol,environmentalandweatherabilityresearchanddevelopmentstudies,andfabricationtolerancepredictionconstituteusefulapplications.Choiceofthespecificimpactorheadconfigurationusedisrelatedtoavarietyofproductattributes,suchasspecimenthicknessandproducttoughnessaswellasabstractfactors,suchastheanticipatedmodeoffailureinaspecificapplication.Thegeometricuniquenessoftheimpactorheadconfigurationspreventsanycomparisonorcorrelationoftestingresultsonsamplestestedwithdifferingimpactorheadconfigurations.Ingeneral,theconicalimpactor,C.125,isusefultoensurefailureofthickerspecimenswheretheH.25impactorcausednofailure.Note28212;Equivalentsurfaceconditionsaremorelikelytooccurwhenspecimensarepreparedbycompressionmoldingorextrusionthanbyinjectionmolding.Whencomparingdifferentsamplestestedwiththesameimpactorheadconfiguration,impactresistanceshallbepermittedtobenormalizedforaveragespecimenthicknessoverareasonablybroadrange(forexample,1to3mm).However,thisshouldonlybedonewhenthesurfaceconditionslistedin6.1areessentiallyequivalent.1.1Thesetestmethodscoverthedeterminationoftheenergyrequiredtocrackorbreakrigidpoly(vinylchloride)(PVC)plasticsheetingandprofileflatsectionsusedinbuildingproducts,aswellasextrudedormoldedtestsamples,underspecifiedconditionsofimpactfromafreefallingstandardweightstrikinganimpactorwitheitheroftwoconfigurationsincontactwiththespecimen.1.2Twotestproceduresareincluded:1.2.1ProcedureA,usedtodetermineminimumimpactenergyrequiredtocausefailure(hole,crack,split,shatter,ortear).1.2.2ProcedureB,usedtodetermineminimumimpactenergyrequiredtocausebrittlefailure.1.3Thevaluesininch-poundunitsaretoberegardedasthestandard.Note18212;ThereisnosimilarorequivalentISOstandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excluding,thoseintablesinfigures)shallnotbeconsideredasrequirementsofthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection8.
【中国标准分类号】:Q22
【国际标准分类号】:83_080_20
【页数】:8P.;A4
【正文语种】:英语