【英文标准名称】:StandardSpecificationforPolytetrafluoroethylene(PTFE)ResinProducedFromDispersion
【原文标准名称】:由分散体制得的聚四氟乙烯(PTFE)树脂标准规范
【标准号】:ASTMD4895-2010
【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】:D20.15
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:coagulateddispersionpolytetrafluoroethylene;fluoropolymers;polytetrafluoroethylene;PTFE;PasteextrudedPTFE;Plastics--specifications;Pressuretesting--plastics;Specimenpreparation(fortesting)--plastics;Stretchingvoidindex(SVI);PTFE(po
【摘要】:1.1Thisspecificationcoversdry-powderresinsofpolytetrafluoroethylene(PTFE)thathavebeenpreparedfromdispersionsofPTFEbymanufacturingtechniquesthatinvolvecontrolledcoagulationofthedispersion.Theseresinsaregenerallyknownasx201C;fine-powderx201D;resinsorx201C;coagulated-dispersionpowderx201D;resins.Theconversionoftheseresinstofinishedproductsnormallyinvolvesaprocesscalledx201C;pasteextrusion,x201D;andsometimesinvolvesformativeprocessessuchascalendering.Avolatileliquidispresentasaprocessingaidduringtheseformativestagesofconversion,andissubsequentlyremovedduringthefinishingstagesofconversion.ThesePTFEresinsarehomopolymersoftetrafluoroethylene,or,insomecases,modifiedhomopolymerscontainingnotmorethan1%byweightofotherfluoromonomers.Theusualmethodsofprocessingthermoplasticsgenerallyarenotapplicabletothesematerialsbecauseoftheirviscoelasticproperties.ThematerialscoveredhereindonotincludemixturesofPTFEwithadditivessuchascolors,fillers,orplasticizers;nordotheyincludereprocessedorregroundresinoranyfabricatedarticlesbecausethepropertiesofsuchmaterialshavebeenirreversiblychangedwhentheywerefibrillatedorsintered.Themethodsandpropertiesincludedarethoserequiredtoidentifythevariousresins.Anadditionalprocedureisprovidedintheappendixforfurthercharacterizationoftheresins.1.2ThevaluesstatedinSIunitsasdetailedinaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.3ThefollowingsafetyhazardscaveatpertainsonlytotheSpecimenPreparationSection,Section9,andtheTestMethodsSection,Section10,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeWarningnotein9.1.1foraspecifichazardsstatement.Note18212;InformationinthisspecificationistechnicallyequivalenttorelatedinformationinISO12086-1andISO12086-2.
【中国标准分类号】:G32
【国际标准分类号】:83_080_10
【页数】:14P.;A4
【正文语种】:英语