ASTM D5672-2009 使用25mm(1in)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

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【英文标准名称】:StandardTestMethodforTestingFlexibleCellularMaterialsMeasurementofIndentationForceDeflectionUsinga25-mm(1-in.)DeflectionTechnique
【原文标准名称】:使用25mm(1in)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】:ASTMD5672-2009
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:flexiblecellular;foamhardness;indentationtest;polyurethane;Flexiblecellularmaterials;Foamhardness;Hardness(indentation)--plastics;Indentationforcedeflection(IFD)
【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.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThistestmethodandISO2439addressthesamesubjectmatter,butdifferintechnicalcontent.
【中国标准分类号】:G30
【国际标准分类号】:83_100
【页数】:3P.;A4
【正文语种】:英语