【英文标准名称】:StandardTestMethodforCellSizeofRigidCellularPlastics
【原文标准名称】:测定硬质泡沫塑料微孔尺寸的标准试验方法
【标准号】:ASTMD3576-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;泡沫橡胶;塑料;大小测量;尺寸;纸浆;孔
【英文主题词】:cellsize;rigidcellularplastics
【摘要】:Severalphysicalpropertiesofrigidcellularplasticsaredependentoncellsizeandcellorientation.Measuringwaterabsorptionandopen-cellcontentinaccordancewithTestMethodD2842andTestMethodD2856requiresknowledgeofsurfacecellvolume,whichusescellsizevaluesinthecalculations.Thistestmethodprovidesanapparentcellsizebecauseitassumesthatthereisnomeasurableedgetoedgeortoptobottomvariationinaveragecellsizeandthatthecellsizedistributionabouttheaveragecellsizeisnormal.Iftheanalystisconcernedtheremaybesignificantvariationineithertheaveragecellsizeorthecellsizedistributionmoredetailedanalysismayberequired.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,oracombinationthereof,coveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.FIG.1RazorBladeCellSizeSpecimenSlicerFIG.2CellSizeScaleSlideAssembly1.1Thistestmethodcoversthedeterminationoftheapparentcellsizeofrigidcellularplasticsbycountingthenumberofcell-wallintersectionsinaspecifieddistance.1.2ProcedureArequiresthepreparationofathinslice,notmorethanonehalftheaveragecelldiameterinthickness,thatismechanicallystable.Formostrigidcellularplasticsthislimitsthetestmethodtomaterialswithanaveragecellsizeofatleast0.2mm.1.3ProcedureBisintendedforusewithmaterialswhosefriablenaturemakesitdifficulttoobtainathinsliceforviewing.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninbracketsareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;TheannextoISO2896istechnicallyequivalenttothistestmethod.
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】: