【英文标准名称】:StandardPracticeforPerformingAcceleratedOutdoorWeatheringofPressure-SensitiveTapesUsingConcentratedNaturalSunlight
【原文标准名称】:用浓聚的自然光进行压敏带的加速室外老化的标准实施规程
【标准号】:ASTMD5105-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D10.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:露天气候;包装件;快速试验;阳光;窄条带材;通风
【英文主题词】:acceleratedoutdoorweathering;naturalsunlight;pressure-sensitivetape
【摘要】:Thispracticeprovidesameansofqualitativeassessmentsofoutdoorweatheringeffectsonpressure-sensitivetapes.Theresistanceoftapestooutdoorweatheringisdeterminedrelativetotheresistanceofacontroltapewithknownstability.Iftestsdescribedinthispracticeproducethesametypeofdegradationasfoundinreal-timeexposuresofthesamematerials,itispossibletousetheresultsfromtheseshort-termteststodeterminethequantitativeeffectsofnaturalweathering.Thetimingofexposuretestingcoveringbothoutdoorconventionalandoutdooracceleratedexposureofthispractice,usinglevelsofultravioletsolarradiationexposure(MJ/m2)ofUV(295to385nm)isanimprovementinthetimingofexposuretesting.Testingspecificlevelsofsolarradiantexposure(MJ/m2)maybeusedtoestablishrelativeequivalentexposure,buttheuseof(MJ/m2ofUV(295to385nm))isthepreferredmethod.4,5,6Theradiantexposure(308or616MJ/m2)suggestedinthispracticeapproximatesoneandtwoyears,respectively,ofexposureintheSouthwestandFlorida.Sinceallmaterialsx201C;weatherx201D;atdifferentratesindifferentenvironments,resultsobtainedusingthispracticeshouldnotberepresentedasequivalenttonaturalweatheringuntilthedegreeofquantitativecorrelationhasbeenestablishedforthematerialtestedintheenvironmentofitsuse.Note18212;Theultravioletcontentofnaturalsunshineistime-of-yeardependent,bothqualitativelyandquantitatively.Thus,wintertimetestingrequireslongerexposureperiodsontheFlesnel-reflectortestmachinesdescribedtoachieveequalultravioletenergydepositionandaquantitativeequallevelofdegradationconcomitantwithsummertimetesting.1.1Thispracticecoversoneprocedurefortheexposureofpressure-sensitivetapestoanacceleratedoutdoorweatheringenvironment.1.2Thispracticedescribessamplepreparationandanacceleratedoutdoorenvironmenttowhichitshallbeexposed.Itdoesnotspecifywhatobservationsortestsaretobeperformedonthematerialfollowingexposure.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A80
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: