ANSI/ASTM D4969-1997 PTFE覆层玻璃纤维规范(08.03)
时间:2024-05-21 20:53:39 来源: 标准资料网 作者：标准资料网 阅读：9538
【英文标准名称】:SpecificationforPTFECoatedGlassFabric(08.03)
【原文标准名称】:PTFE覆层玻璃纤维规范(08.03)
【标准号】:ANSI/ASTMD4969-1997
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【实施或试行日期】:1998-07-09
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:聚四氟乙烯;玻璃布;覆层
【英文主题词】:glassfabrics;coatings;polytetrafluoroethylene
【摘要】:Thisspecificationcoversglassfabricimpregnated,coated,andsinteredonbothsideswithPTFEtoanominalthicknessof0.318mm(0.015in.)orless.ThePTFE-coatedglassfabricisforelectrical,chemical,andmechanicaluses.ThePTFE-coatedglassfabricofthisspecificationdoesnotpertaintostructuralfabric,single-sidedPTFEcoatings,ormaterialsusedforlaminates.ThevaluesstatedinSIunitsasdetailedinIEEE/ASTMSI-10.Note1-ThereisnoISOstandardthatcoversinformationincludedinthisspecification.ThedielectrictestismentionedinISO12086-2andISO13000-1and2.
【中国标准分类号】:Q36
【国际标准分类号】:59_080_40
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforThermal-OxidativeStabilityofPolypropyleneUsingaSpecimenRotatorWithinanOven
【原文标准名称】:用炉内样品旋转器测定丙烯塑料的热氧化稳定性的标准试验方法
【标准号】:ASTMD3012-2007
【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】:D20.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:热学;氧化;塑料;丙烯;耐力;稳定性;测试
【英文主题词】:aging;biaxialrotator;polypropylene;thermalaging;thermaloxidativestability
【摘要】:Underthesevereconditionsofthistestmethod,thespecimensundergodegradationataratethatisdependentuponthethermalenduranceofthepolypropylenematerialunderexamination.Thethermallevelofthistestmethodisconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenematerialswithlowerheatstability.Thetechniqueofspecimenrotationdescribedinthistestmethodprovidesanestimateofthelife-temperaturerelationshipofpolypropylene.Ifthistestmethodisconductedatdifferenttemperaturesonthesamematerial,amorereliableestimateofthelife-temperaturerelationshipofpolypropyleneisdetermined.ThistestmethodcanbeconductedatseveraltemperaturesandthedatainterpretedthroughuseoftheArrheniusrelation,byplottingthelogarithmsoftimestofailureagainstthereciprocalsofthetemperaturesinkelvins(K).Temperaturesintherangefrom100to150x00B0;C,withintervalsof10x00B0;C,aresuggestedforthispurpose.Thestabilityasdeterminedundertheprescribedtestmethodisnotdirectlyrelatedtothesuitabilityofthecompoundforausewheredifferentconditionsprevail.Thespecimenrotationtechniqueofthermalagingincreasestheprobabilitythatallspecimenswillbeexposedsimilarlyandthattheeffectoftemperaturegradientsinanovenwillbeminimized.1.1Thistestmethodprovidesameansforestimatingtheresistanceofpolypropylene,inmoldedform,toacceleratedagingbyheatinthepresenceofairusingaforceddraftoven.1.2Thestabilitydeterminedbythistestmethodisnotdirectlyrelatedtothesuitabilityofthematerialforusewhendifferentenvironmentalconditionsprevailandshallnotbeusedtopredictperformance.Note1Thespecifiedthermallevelsinthistestmethodareconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenewithlowerheatstabilities.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note2ThistestmethodandISO4577-1983aretechnicallysimilarbutdifferentinpreparationoftestspecimens,thicknessoftestspecimen,measurementofthenumberofairflowchangesintheovens,andthenumberofairchangesperhourrequired.1.4Thepurposeofthisappendixistoprovideasecondarymethodfordeterminingthenumberofairexchangesthatoccurwithintheforceddraftovenusedformeasurementofthermaloxidativestability.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:6P.;A4
【正文语种】:
【英文标准名称】:Informationtechnology-MPEGaudiotechnologies-Part1:MPEGSurround-Amendment2:Referencesoftware;TechnicalCorrigendum1
【原文标准名称】:信息技术.MPEG音频技术.第1部分:MPEG环绕.修改件2:参考软件.技术勘误表1
【标准号】:ISO/IEC23003-1AMD2TechnicalCorrigendum1-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-10-01
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1/SC29
【标准类型】:()
【标准水平】:()
【中文主题词】:音频的;兼容水平;兼容性;数据信号;编码;信息技术;MPEG;多通道的;信号;软件;立体声
【英文主题词】:Audio;Compatibilitalevel;Compatibility;Datasignal;Encoding;Informationtechnology;MPEG;Multichannels;Signals;Software;Stereo
【摘要】:
【中国标准分类号】:L71
【国际标准分类号】:35_040
【页数】:1P.;A4
【正文语种】:英语