【英文标准名称】:StandardTestMethodforHeatStabilityofHot-MeltAdhesives
【原文标准名称】:热熔胶粘剂的热稳定性用标准试验方法
【标准号】:ASTMD4499-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D14.50
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶粘剂;测试
【英文主题词】:color;heatstability;hot-meltadhesive;meltviscosity;phaseseparation;skinformation
【摘要】:Hot-meltadhesivesmustgenerallybeappliedatrelativelyhightemperaturesinorderthattheadhesiveviscosityislowenoughthatitcanbereadilyhandledintypicalhot-meltequipment.Changesintheadhesivecausedbyexposuretothesevereenvironmentrequiredduringhot-meltprocessingwilldisrupttheadhesiveapplicationprocessandmayaffectthequalityoftheadhesivebond.Changesinadhesiveviscositymayaffectthequantityofadhesivedispensedbytheapplicator.Phaseseparationorchangesinviscosityandcolormaybeanindicationofchangesoccurringintheadhesivewhichcouldaffectthequalityoftheadhesivejoint.Askinformedontheadhesivemayeventuallyclogtheapplicatornozzleordie.Thedatageneratedinthistestprocedurearecomparativeinnature.Resultscanbeusefulinobservingbatch-to-batchvariationorrelativethermalstabilityofalternateadhesiveformulations.Resultscanalsobeusefulinselectingapplicationequipmentandestablishingoperatingconditionsforsatisfactoryhandlingofaparticularhot-meltadhesive.Round-robintestingshowedthatthereproducibilityofthistestmethodcandependstronglyonthecharacteristicsoftheadhesivebeingtested.Resultsshowedthat,fortheparticularadhesivestestedintheroundrobin,thetestmethodwaswellsuitedfortestingtheheatstabilityoftheadhesivesbasedonanEVAcopolymer,apolyolefin,andapolyamide.However,becauseofpoorreproducibility,thetestmethodprovedtobeunsuitableforassessingtheheatstabilityoftheadhesivebasedonablockcopolymer.PrecisionofthistestmethodisdiscussedinSection11.1.1Thistestmethodcoverstheevaluationofhot-meltadhesiveswithrespecttothechangeinpropertiesthatoccurswhiletheadhesiveisagedinthemoltenstateduringhot-meltapplication.Meltpropertiesmonitoredareviscosity,color,skinformation,andphaseseparation.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G39
【国际标准分类号】:83_180
【页数】:5P.;A4
【正文语种】: