【英文标准名称】:StandardTestMethodforTestingFlexibleCellularMaterialsMeasurementofIndentationForceDeflectionUsinga25-mm(1-in.)DeflectionTechnique
【原文标准名称】:使用25mm(1英寸)挠曲技术试验压痕力挠曲的软微孔材料测量的标准试验方法
【标准号】:ASTMD5672-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:泡沫材料;硬度试验;试验
【英文主题词】:flexiblecellular;foamhardness;indentationtest;polyurethane
【摘要】:The25-mm[1-in.]deflectionIFDmethodisrecommendedforproductionscreeningandqualitycontrolonfullsizecushionsonly.Applicablecushionthicknessestobetestedbythistestmethodareonlythoselistedinthistestmethod.Furtherresearchanddevelopmentarerequiredbeforethistestmethodwillbeapplicabletoothercushionthicknesses.Thistestmethodisdesignedtogiveavalueapproximatingthe25%IFDona100-mm[4-in.]thickpieceoffoamwhentheactualspecimenthicknesstestediswithintherangeslistedinthetestmethod.Incaseofdisagreement,therefereemethodistheIFDprocedureinTestMethodsD3574,TestB1.Theuserofthistestmethodshallestablishthecorrelationbetweenthistestmethodandtherefereemethod.1.1Thistestmethodcoversascreeningtypequalitycontroltestusedtodetermineifflexiblepolyurethanefoamcushionsarewithinthespecifiedgraderangeforfirmness.1.2Thistestmethodislimitedtofoamswiththicknessesthatare75mm[3in.]orgreater.1.3ThistestmethodisbasedonthefactthatthetraditionalindustrystandardthicknessforIndentationForceDeflection(IFD)is100mm[4in.],andthetraditionalpercentdeflectionforIFDacceptanceandproductplanningis25%.Withrespectthentothesetraditionalindustryconventions,a25%deflectionona100-mm[4-in.]cushionwouldbe25mm[1in.].Thus,deflectingproperthicknesscushions25mm[1in.]willdetermineiftheflexiblepolyurethanefoamiswithinthespecifiedgraderangefor25%IFD.1.4Cushionthicknesseslessthan75mm[3in.]shallnotbetestedforIFDusingthistestmethod.1.5Thistestmethodisintendedtoprovideaquickandsimplemethodtoscreenflexiblepolyurethanefoamsfordeterminationofitsfirmnessgrade.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212ISO2439isasimilartest,buttherearetechnicaldifferences.
【中国标准分类号】:G30
【国际标准分类号】:83_100
【页数】:2P.;A4
【正文语种】: