Designation:D4802−16StandardSpecificationforPoly(MethylMethacrylate)AcrylicPlasticSheet1ThisstandardisissuedunderthefixeddesignationD4802;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoversmonolithicmethacrylatesheetsproducedbyvariousprocesses.Forthisspecification,meth-acrylatesheetshallbecomposedofpolymerizedacrylicmonomersofwhichatleast80%shallbemethylmethacrylate.NOTE1—ThisspecificationisintendedtoconsolidatetherequirementsoftheCastMethacrylatePlasticSheetsportionofdiscontinuedFed.Spec.L-P-391D,discontinuedSpecificationD702.CastMethacrylatePlasticSheets,Rods,TubesandShapes,anddiscontinuedSpecificationD1547,ExtrudedAcrylicPlasticSheet.1.2Thisspecificationisintendedtocoveracrylicsheetforgeneral-purposeapplications.Forspecialtyapplicationscon-sulttheappropriateusestandards.1.3Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportion,Section8,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.1.4Acrylicsheetisusedfrequentlyinapplicationsinwhichextremeclarity,lackofopticaldistortionandabsenceofanyforeignparticulatematterareofprimarysignificance.Re-groundmaterialissuitableforuseaslongascarefulcontrolisusedtoeliminateadverseeffectsontheseproperties.TheuseofrecycledmaterialintypeB-1andB-2sheet,isnotsuitableforusewhenthesepropertiesareadverselyaffected.TheuseofrecycledorregroundmaterialisnotpossiblefortypeA-1andA-2materialssincethesheetisproduceddirectlyfrommonomerNOTE2—ThisstandardandISO7823-1addressthesamesubjectmatter,butdifferintechnicalcontent...
