ASTM F1921-1998(2004) 构成挠性腹板密封表面的热塑聚合物和混合物的热封强度(热点焊焊缝)的标准试验方法

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【英文标准名称】:StandardTestMethodforHotSealStrength(HotTack)ofThermoplasticPolymersandBlendsComprisingtheSealingSurfacesofFlexibleWebs
【原文标准名称】:构成挠性腹板密封表面的热塑聚合物和混合物的热封强度(热点焊焊缝)的标准试验方法
【标准号】:ASTMF1921-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:F02.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:绝热性能;热点焊焊缝;密封强度;热封
【英文主题词】:heatseal;heatsealability;hottack;sealstrength
【摘要】:Inform-filloperations,sealedareasofpackagesarefrequentlysubjecttodisruptiveforceswhilestillhot.Ifthehotsealshaveinadequateresistancetotheseforces,breakagecanoccurduringthepackagingprocess.Thesetestmethodsmeasurehotsealstrengthandcanbeusedtocharacterizeandrankmaterialsintheirabilitytoperformincommercialapplicationswherethisqualityiscritical.1.1Thesetestmethodscoverlaboratorymeasurementofthestrengthofheatsealsformedbetweenthermoplasticsurfacesofflexiblewebs,immediatelyafterasealhasbeenmadeandbeforeitcoolstoambienttemperature.1.2Thesetestmethodsarerestrictedtoinstrumentedhottacktesting,requiringatestingmachinethatautomaticallyheatsealsaspecimenandimmediatelydeterminesstrengthofthehotsealatapreciselymeasuredtimeafterconclusionofthesealingcycle.Anadditionalprerequisiteisthattheoperatorshallhavenoinfluenceonthetestafterthesealingsequencehasbegun.Thesetestmethodsdonotcovernon-instrumentedmanualproceduresemployingsprings,levers,pulleysandweights,wheretestresultscanbeinfluencedbyoperatortechnique.1.3Twovariationsoftheinstrumentedhottacktestaredescribedinthesetestmethods,differingprimarilyintworespects:(a)rateofgripseparationduringtestingofthesealedspecimen,and(b)whetherthetestingmachinegeneratesthecoolingcurveofthematerialundertest,orinsteadmakesameasurementofthemaximumforceobservedfollowingasetdelaytime.Bothtestmethodsmaybeusedtotestallmaterialswithinthescopeofthesetestmethodsandwithintherangeandcapacityofthemachineemployed.TheyaredescribedinSection4.1.4SIunitsarepreferredandshallbeusedinrefereedecisions.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Theoperatoroftheequipmentistobeawareofpinchpointsasthesealjawscometogethertomakeaseal,hotsurfacesofthejaws,andsharpinstrumentsusedtocutspecimens.Itisrecommendedthattheoperatorreviewsafetyprecautionsfromtheequipmentsupplier.
【中国标准分类号】:G31
【国际标准分类号】:83_120
【页数】:6P.;A4
【正文语种】: