ASTM D4803-1997(2002)e1 聚氯乙烯(PVC)建筑产品中预测生热性的标准试验方法

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【英文标准名称】:StandardTestMethodforPredictingHeatBuildupinPVCBuildingProducts
【原文标准名称】:聚氯乙烯(PVC)建筑产品中预测生热性的标准试验方法
【标准号】:ASTMD4803-1997(2002)e1
【标准状态】:现行
【国别】:
【发布日期】:1997
【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】:D20.24
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;锌含量;建筑;塑料;热发生
【英文主题词】:heatbuildup;PVCbuildingproducts;sunenergyabsorption;weathering
【摘要】:HeatbuildupinPVCexteriorbuildingproductsduetoabsorptionoftheenergyfromthesunmayleadtodistortionproblems.Heatbuildupisaffectedbythecolor,emittance,absorptance,andreflectanceofaproduct.Generally,thedarkerthecoloroftheproduct,themoreenergyisabsorbedandthegreateristheheatbuildup.However,evenwiththesameapparentcolor,theheatbuildupmayvaryduetothespecificpigmentsysteminvolved.Thegreatestheatbuildupgenerallyoccursinthecolorblackcontainingcarbonblackpigment.Theblackcontrolsampleusedinthistestmethodcontains2.5partsoffurnaceblackper100partsofPVCsuspensionresin.Themaximumtemperatureriseaboveambienttemperatureforthisblackis90x00B0;F(50x00B0;C)fora45x00B0;orhorizontalsurfacewhenthesunisperpendiculartothesurfaceand74x00B0;F(41x00B0;C)foraverticalsurfaceassumingthatthemeasurementsweredoneonacloudlessdaywithnowindandheavyinsulationonthebackofthespecimen.8SeeAppendixX1.Thistestmethodallowsthemeasurementofthetemperatureriseunderaspecifictypeheatlamp,relativetothatofablackreferencesurface,thuspredictingtheheatbuildupduetothesunrsquo;energy.Thetestmethodallowspredictionofheatbuildupofvariouscolorsorpigmentsystems,orboth.Thistestmethodgivesarelativeheatbuildupcomparedtoblackundercertaindefinedsevereconditionsbutdoesnotpredictactualapplicationtemperaturesoftheproduct.Thesewillalsodependonairtemperature,incidentangleofthesun,clouds,windvelocity,insulation,installationbehindglass,etc.1.1ThistestmethodcoverspredictionoftheheatbuildupinrigidandflexiblePVCbuildingproductsaboveambientairtemperature,relativetoblack,whichoccursduetoabsorptionofthesun''senergy.Note18212;Thistestmethodisexpectedtobeapplicabletoalltypesofcoloredplastics.TheresponsiblesubcommitteeintendstobroadenthescopebeyondPVCwhendataonothermaterialsissubmittedforreview.Note28212;TherearenoISOstandardscoveringtheprimarysubjectmatterofthistestmethod.1.2RigidPVCexteriorprofileextrusionsforassembledwindowsanddoorsarecoveredinSpecificationD4726.1.3RigidPVCexteriorprofilesforfencingarecoveredinSpecificationF964.1.4RigidPVCsidingprofilesarecoveredinSpecificationD3679.1.5RigidPVCsoffitprofilesarecoveredinSpecificationD4477.1.6RigidPVCandRigidCPVCplasticbuildingproductscompoundsarecoveredinSpecificationD4216.1.7Thetextofthistestmethodreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthistestmethod.1.8Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificsafetyhazardstatementsaregiveninSection7.
【中国标准分类号】:Q74
【国际标准分类号】:83_140_01;83_140_99
【页数】:5P.;A4
【正文语种】: