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塑料认证导则,来自UL网站:Plastics-ComponentThematerialscoveredunderthiscategoryareincompleteincertainconstructionalfeaturesorrestrictedinperformancecapabilitiesandareintendedforuseascomponentsofcompleteequipmentsubmittedforinvestigationratherthanfordirectseparateinstallationinthefield.THEFINALACCEPTANCEOFTHECOMPONENTISDEPENDENTUPONITSINSTALLATIONANDUSEINEQUIPMENTSUBMITTEDTOUNDERWRITERSLABORATORIESINC.GENERALThiscategorycoversmaterialsthathavebeentestedinaccordancewithestablishedmethodstodefinetheirpropertiesinordertofacilitateinvestigationoftheiruseinend-useproductapplications.Thetestsmayincludethedeterminationofmaterialflammability(burningcharacteristics),ignitioncharacteristicsfromvariousthermalandelectricalsources,electricaltrackingandotherelectricalcharacteristics,physicalandmechanicalcharacteristics,andanalyticaltests.Inaddition,theeffectoflong-termexposuretoelevatedtemperature(air-ovenaging),water,ultravioletlight,cold,etc.,onpropertyretentionmaybeinvestigated.Levelsofperformancecharacteristicsrequiredforaparticularend-useproductapplicationareintendedtobeinaccordancewiththerequirementsoftheend-useproductstandard.Duetospacelimitations,onlyalimitednumberofpropertyvaluesmaybepresentedintheindividualRecognitions.AdditionalpropertiesmaybefoundintheULiQ™forPlasticsdatabaseatwww.ul.com,orintheindividualReports.Inthosecaseswherethematerialshavethesameperformancecharacteristics,withtheexceptionofweatheringresistance,theyaretabulatedtogetherasagroupwitheachmaterialdesignationseparatedbyacomma.TheindividualRecognitionsmayincludealternatedesignationsaswellasmaterialsthatarebasicallysimilarincompositionbutdifferbysomeminorvariation,suchasmolecularweight,lubricants,colorants,etc.Thecolorsshownthereonareaspigmentedbythematerialmanufacturer;unlessotherwiseindicated,thepropertyvaluesarefortheunpigmented(Naturalcolor)material.RefertoFlame-retardantand/orColorConcentrates(QMQS2)andANSI/UL746D,"PolymericMaterials-FabricatedParts,"forlimitationsontheuseofconcentratesbythepartmolderorprocessor.ThefollowingabbreviationsmaybeusedintheindividualRecognitionstorepresentthematerialcolor:ColorsAbbreviationColorALAluminumALL-AO-ATAnycolor-Anycolor(opaqueonly)-Anycolor(transparentonly)AMAmberBGBeigeBKBlackBLBlueBNBrownBZBronzeCLClear GDGoldGNGreenGYGrayIVIvory NCNatural(Nopigmentation)OLOlive OROrangePKPinkRDRedSMSmoke TNTan VTVioletWTWhiteYLYellowFlammabilityMaterialsmaybeclassifiedbasedonburningtestsconductedinaccordancewithANSI/UL94,"TestforFlammabilityofPlasticMaterialsforPartsinDevicesandAppliances,"ANSI/UL1694,"TestsforFlammabilityofSmallPolymericComponentMaterials,"andANSI/UL723,"TestforSurfaceBurningCharacteristicsofBuildingMaterials."ANSI/UL94small-scaletestdatadoesnotpertaintobuildingmaterials,furnishingsandrelatedcontents.ANSI/UL94small-scaletestdataisintendedsolelyfordeterminingtheflammabilityofplasticmaterialsusedinthecomponentsandpartsofend-useproductdevicesandappliances,wheretheacceptabilityofthecombinationisdeterminedbyUL. TESTNAME(perANSI/UL94)HorizontalBurningTest20mmVerticalBurningTestThinMaterialVerticalBurningTestHorizontalBurningFoamedMaterialTest 500Watt(125mm)VerticalTestFlameRatingHierarchy—V-0VTM-0—MoreSevere5VA—V-1VTM-1HF-1↑↑↑—V-2VTM-2HF-25VBHB——HBFLessSevereThermalEnduranceThetemperaturebelowwhichaclassofcriticalpropertywillnotbeunacceptablycompromisedthroughchemicalthermaldegradation,overthereasonablelifeofanelectricalproduct(relativetoareferencematerialhavingaconfirmed,acceptablecorrespondingperformance)isdefinedastheRelativeThermalIndex(RTI).MorethanoneRTImaybeappropriateforagivenmaterialdependingonthepropertyrequirementsforagivenapplication.Incertaincases,highertemperaturesarepermittedifsospecifiedbytheend-useproductstandard.RTIElec—ElectricalRTI,associatedwithcriticalinsulatingproperties.RTIMechImp—MechanicalImpactRTI,associatedwithcriticalimpactresistance,toughness,elongationandflexibilityproperties.RTIMechStr—MechanicalStrength(MechanicalwithoutImpact)RTI,associatedwithcriticalmechanicalstrengthandstructuralintegritywhereimpactresistance,resilienceandflexibilitymaynotbeessential.ResistancetoIgnitionandTrackingPropertiesPerformancemaybeinvestigatedwithrespecttoelectricaltrackresistance,abilitytoresistignitionfromelectricalsources,andotherelectricalproperties.Inordertoavoidanexcessivelevelofimpliedprecisionandbias,materialperformancesforseveraltestsarerecordedasPerformanceLevelCategories(PLC),basedonthemeantestresults(ratherthanrecordingtheexactnumericalresults),asindicatedinthetablefollowingthetestdescription.Hot-WireIgnition(HWI;ASTMD3874,IEC60695-2-20)—Performanceisexpressedasthemeannumberofsecondsneededtoeitherignitestandardspecimensortoburnthroughthespecimenswithoutignition.HWIRangeMeanIgnitionTime(insec)AssignedPLC120andlonger060through119130through59215through2937through144Lessthan75High-CurrentArcIgnition(HAI;ANSI/UL746A)—Performanceisexpressedasthenumberofarcruptureexposures(standardizedastoelectrodetypeandshapeandelectriccircuit)thatarenecessarytoigniteamaterialwhentheyareappliedatastandardrateonthesurfaceofthematerial.HAIRangeMeanNumberofArcstoCauseIgnitionAssignedPLC120andgreater060through119130through59215through293Lessthan154High-VoltageArcTrackingRate(HVTR;ANSI/UL746A)—Denotedastherate,inmm/min,thatatrackingpathcanbeproducedonthesurfaceofthematerialunderstandardizedtestconditions.Anotationismadeifignitiononthematerialtakesplace.Theresultsoftestingthenominal3mmthicknessareconsideredrepresentativeofthematerial'sperformanceinanythickness.HVTRRange(inmm/min)AssignedPLC0through10010.1through25.4125.5through80280.1through1503Greaterthan1504High-Voltage,Low-CurrentArcResistance(D495;ASTMD495)—Expressedasthenumberofsecondsthatamaterialresiststheformationofasurfaceconductingpathwhensubjectedtoanintermittentlyoccurringarcofhighvoltage,lowcurrentcharacteristics.Theresultsoftestingthenominal3mmthicknessareconsideredrepresentativeofthematerial'sperformanceinanythickness.D495RangeMeanTimeofArcResistance(insec)AssignedPLC420andlonger0360through4191300through3592240through2993180through2394120through179560through1196Lessthan607ComparativeTrackingIndex(CTI;ASTMD3638)—Expressedasthatvoltagewhichcausestrackingafter50dropsof0.1percentammoniumchloridesolutionhavefallenonthematerial.Theresultsoftestingthenominal3mmthicknessareconsideredrepresentativeofthematerial'sperformanceinanythickness.CTIRangeTrackingIndex(involts)AssignedPLC600andgreater0400through5991250through3992175through2493100through1744Lessthan1005Theabovecharacteristicsanddielectricstrength,volumeresistivityandotherelectricalandmechanicalpropertiesmaybedeterminedbymeansoftheapplicableASTMand/orULspecificationinANSI/UL746A,"PolymericMaterials-ShortTermPropertyEvaluations."Inadditiontominimumelectricalandignitiontestlevels,materialsthatareusedinapplicationsinvolvingsupportorcontactwithcurrent-carryingpartsarealsorequiredtodisplayaminimumstability(heatdistortion,moistureresistance,dimensionalstabilityandmoldstress)performancelevel,asdescribedinANSI/UL746C,"PolymericMaterials-UseinElectricalEquipmentEvaluations."CONDITIONSOFACCEPTABILITYUnlessspecifiedotherwiseintheindividualRecognitions,considerationistobegiventothefollowingConditionsofAcceptabilitywhenthesecomponentsareemployedintheend-useequipment:1.MaterialtraceabilityforpartscoveredunderFabricatedParts(QMMY2).2.Materialidentificationforadeviceemployingpartsmoldedofthesematerialsshouldspecifytheparts'wallthickness,color,materialidentification,andtraceability.3.MaterialsmustmeetapplicablerequirementsconcerningthemoldingandfabricatingoffinishedpartsasdescribedinANSI/UL746D,"PolymericMaterials-FabricatedParts."Thisincludes,butisnotlimitedto,therestricteduseofregrindthermoplasticmaterialtoamountslessthan25%unlessspecifiedintheindividualRecognitions.4.Unlessotherwiseindicated,suitabilityforusewhenexposedtoweathering,oils,soaps,chemicals,x-rays,andthelikehasnotbeendetermined.5.InvestigationofpartsforotherpropertiesinaccordancewiththeapplicableULend-useproductstandardand/orrequirementsoutlinedinANSI/UL746C.AdditionalConditionsofAcceptabilitymaybefoundintheindividualRecognitionReportavailablefromthemanufacturer.GENERICMATERIALSYMBOLSThegenericmaterialsymbolsarebasedupontheterminologydevelopedintheInternationalOrganizationforStandardizationpublicationsISO1043,"Plastics-SymbolsandAbbreviatedTerms,"andISO1629,"RubberandLatices-Nomenclature." FOAMEDMATERIALSMaterialsthathavebeenfoamedwiththeintroductionofachemicalblowingagentorinertgasmayhavesignificantlydifferentpropertiesthantheunfoamedorsolidmaterialform;therefore,ratingsthatareestablishedforsolid(unfoamed)materialdonotautomaticallyapplytothefoamedversionofthatsamematerial.MATERIALSFORUSEINSPECIALENVIRONMENTSInvestigationofmaterialsforspecificend-useproductapplicationswhererequirementsexistfortheretentionofpropertiesafterexposuretocertaincriticaloperatingand/orenvironmentalconditionsmaybeindicatedintheindividualRecognitions.COLUMNHEADINGABBREVIATIONSThefollowingabbreviationsmaybeusedinthecolumnheadingsintheindividualRecognitions:AbbreviationTermFlameClassANSI/UL94FlammabilityClassificationMaterialDsgMaterialDesignationColColorMinThkMinimumThicknessThkRgThicknessRangeDenRangeg/ccDensityRange,g/ccElecElectricalRPRadiantPanelRTIRelativeTemperatureIndexHWIHot-WireIgnitionHAIHighCurrentArcIgnitionHVTRHighVoltageArcTrackingRateD495ArcResistanceCTIComparativeTrackingIndexMechMechanicalTnslTensileElongElongationStrStrengthImpImpactRELATEDPRODUCTSRefertothefollowingforcomponentsmanufacturedunderotherproductcategories:PolymericMaterials-Filament-woundTubing,IndustrialLaminates,VulcanizedFiber,andMaterialsforUseinFabricatingRecognizedPrintedWiringBoards(QMTS2)CoatingsforUseonRecognizedPrintedWiringBoards(QMJU2)MetallizedParts(QMRX2)SupplierComponentsforUseintheFabricationofMetallizedParts(QMSS2)Systems,ElectricalInsulation(OBJY2)PolymericAdhesiveSystems,ElectricalEquipment(QOQW2)Flame-retardantand/orColorConcentrates(QMQS2)Mold-releaseLubricants(QMSX2)