【英文标准名称】:SpecificationforPolytetrafluoroethylene(PTFE)GranularMoldingandRam(08.03)
【原文标准名称】:聚四氟乙烯(PTFE)颗粒模塑和压塑规范(08.03)
【标准号】:ANSI/ASTMD4894-1998
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【实施或试行日期】:1998-10-13
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:聚四氟乙烯;塑料
【英文主题词】:plastics;polytetrafluoroethylene
【摘要】:Thisspecificationcoversgranularresinsandtestmethodsforpolytetrafluoroethylene(PTFE)thathaveneverbeenpreformedormoldedandarenormallyprocessedbymethodssimilartothoseusedinpowdermetallurgyorceramics,orbyspecialextrusionprocesses.ThesePTFEresinsarehomopolymersoftetrafluoroethylene,or,insomecases,modifiedhomopolymerscontainingnotmorethanonepercentbyweightofotherfluoromonomers.Theusualmethodsofprocessingthermoplasticsgenerallyarenotapplicabletothesematerialsbecauseoftheirviscoelasticpropertiesatprocessingtemperatures.ThematerialsincludedhereindonotincludemixturesofPTFEresinwithadditivessuchascolorants,fillersorplasticizers;nordotheyincludereprocessedorregroundresinoranyfabricatedarticles.Themethodsandpropertiesincludedarethoserequiredtoidentifythevarioustypesofresins.AdditionalproceduresareprovidedintheAppendixforfurthercharacterizationoftheresins.ThevaluesstatedinSIunitsasdetailedinIEEE/ASTMSI-10aretoberegardedasthestandard,andthepracticesofIEEE/ASTMSI-10areincorporatedherein.ThefollowingprecautionarycaveatpertainsonlytotheSpecimenPreparationsection,Section9,andtheTestMethodssection,Section10,ofthisspecification:Thisspecificationdoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeNotes3and9forspecificcautionarystatements.Note1InformationinthisspecificationistechnicallyequivalenttorelatedinformationinISO12086-1andISO12086-2.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语