Designation:F736−95(Reapproved2011)StandardTestMethodforImpactResistanceofMonolithicPolycarbonateSheetbyMeansofaFallingWeight1ThisstandardisissuedunderthefixeddesignationF736;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheenergyrequiredtoinitiatefailureinmonolithicpolycarbonatesheetmaterialunderspecifiedconditionsofimpactusingafreefallingweight.1.2Twospecimentypesaredefinedasfollows:1.2.1TypeAconsistsofaflatplatetestspecimenandemploysaclampedringsupport.1.2.2TypeBconsistsofasimplysupportedthree-pointloadedbeamspecimen(Fig.1)andisrecommendedforusewithmaterialwhichcannotbefailedusingtheTypeAspecimen.Foramaximumdropheightof6.096m(20ft)andamaximumdropweightof22.68kg(50lb),virginpolycar-bonategreaterthan12.70mm(1⁄2in.)thickwillprobablyrequireuseoftheTypeBspecimen.NOTE1—SeealsoASTMMethods:D1709,D2444andD3029.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1Exception—Theinch-poundunitsinparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatement,SeeSection7.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD790TestMethodsforFlexuralPropertiesofUnreinforcedandReinforcedPlasticsandElectricalInsulatingMateri-als3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1failure(oftestspecimen)—failureissignifiedbythepresenceofanycrackorsplitintheimpact-deformedareathatwascreatedbytheimpactofthefallingweightandthatcanbeseenbythenakedeye.4.SummaryofTestMethod4.1Thetestproced...
