BS 1902-5.8-1992 耐火材料试验方法.第5部分:耐火和耐热性.第8部分:热导率测定(拼合柱法)(方法1902-508)

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【英文标准名称】:StandardTestMethodforShrinkTensionandOrientationReleaseStressofPlasticFilmandThinSheeting
【原文标准名称】:塑料薄膜和薄板的收缩张力及定向释放应力的标准试验方法
【标准号】:ASTMD2838-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:film;orientationreleasestress;shrinkforce;shrinktension;thinsheeting;Force;Heatingtests--plastics;Heat-shrinkableplasticfilm/sheeting;Orientationreleasestress;Plasticsheetandfilm;Shrinkage--plastics;Shrinkforce;Stress--plasti
【摘要】:Asaresultofthemanufacturingprocess,internalstressesarelockedintothefilmandthesecanbereleasedbyheating.Foranygiventypeoffilmorsheeting,thetemperaturesatwhichshrinkagewillbeginarerelatedtoprocessingtechniquesemployedtomanufacturethefilmandalsomayberelatedtoaphasetransitioninthebaseresin.Shrinktensionaffectstheappearanceandperformanceofafilminashrink-packagingapplication.Itmayalsobeusedtodeterminethedegreeanddirectionoforientation.Theorientationexertsagreatinfluenceuponimportantphysicalcharacteristicssuchastensilestrength,stiffness,tearresistance,andimpactstrength.DatafromProcedureAaremostusefulfordeterminingthedegreeanddirectionoforientation,orientationreleasestress,andthemaximumforcethatthefilmcanexertatagiventemperature.Since,inactualapplications,filmisseldom,ifever,totallyrestrained,datafromProcedureBareusefulinestimatingtheforceanitemtobepackagedwillactuallyreceiveandinpredictingtheappearanceofpackageditems.Thecharacterizationofshrinktensionasafunctionoftemperature,andtheresultantdeterminationoforientationreleasestressanditscorrespondingtemperature,isusuallycarriedoutonlyforaparticularmaterialofspecifiedthicknessforadefinedfabricationprocess.Forproductdevelopmentpurposes,qualitycontrolanddeterminationofconformitytospecificationlimits,themeasurementofshrinktensionatonlyoneortwospecifiedtemperaturesisnormallysufficient.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintherelevantASTMmaterialspecificationshalltakeprecedenceoverthosementionedinthistestmethod.IftherearenorelevantASTMmaterialspecifications,thenthedefaultconditionsapply.Table1ofClassificationSystemsD4000liststheASTMmaterialspecificationsthatcurrentlyexist1.1Thistestmethodcoversthedeterminationoftheshrinktensionandrelatedcharacteristics,thatis,shrinkforceandorientationreleasestress,ofheat-shrinkableplasticfilmandsheetingoflessthan1.0mm(0.04in.)thickness.Twoproceduresaredescribedthatpermitthemeasurementofshrinkforcesatpredeterminedtemperatures.Theyareasfollows:1.1.1ProcedureAisdesignedtomeasurethemaximumforceexertedbyaspecimenthatistotallyrestrainedfromshrinkingasitisheatedrapidlytoaspecifictemperature.1.1.2ProcedureBisdesignedtomeasurethemaximumforceexertedbyaspecimenthatispermittedtoshrinkapredeterminedamountpriortorestraintwhilebeingheatedrapidlytoaspecifictemperature.1.2OrientationreleasestresscanbedeterminedfromthedataobtainedusingProcedureA.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;Filmhasbeenarbitrarilydefinedassheetinghavingnominalthicknessnotgreaterthan0.25x03BC;m(0.010in.).Note28212;ThereisnoknownISOequivalen......
【中国标准分类号】:G33
【国际标准分类号】:83_140_10
【页数】:5P.;A4
【正文语种】:英语


【英文标准名称】:Steeldecks
【原文标准名称】:冷弯波纹钢板
【标准号】:JISG3352-1979
【标准状态】:作废
【国别】:日本
【发布日期】:1979-06-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonIronandSteel
【标准类型】:()
【标准水平】:()
【中文主题词】:甲板;钢;结构
【英文主题词】:decks;steels;structures
【摘要】:
【中国标准分类号】:H46
【国际标准分类号】:77_140_50
【页数】:24P;A4
【正文语种】:日语