ANSI/ASTM D955-1989 模塑成型塑料的收缩性测量方法

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【英文标准名称】:MethodforMeasuringShrinkagefromMoldingPlastics(08.01)
【原文标准名称】:模塑成型塑料的收缩性测量方法
【标准号】:ANSI/ASTMD955-1989
【标准状态】:作废
【国别】:美国
【发布日期】:1989
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;收缩;塑料
【英文主题词】:plastics;shrinkage;testing
【摘要】:Thistestmethodisintendedtomeasureshrinkagefrommoldcavitytomoldeddimensionsofthermoplasticswhenmoldedbycompressionorinjectionprocesseswithspecifiedprocessconditions.Thistestmethodcoversinitialshrinkagemeasurements.Themethodalsoaccommodatesshrinkageat24and48h,whichmaybecriticalforsomematerials.Thismethodwillgivecomparabledatabasedonstandardspecimensandcannotpredictabsolutevaluesinactualmoldedpartswithvaryingflowpaths,wallthicknesses,pressuregradientsandprocessconditions.Differencesinmoldshrinkagemayalsobeobservedbetweenthethreespecimengeometriesdescribedinthistestmethod.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesaregivenforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThistestmethodistechnicallyidenticaltoISO294-4whereTypeD2specimensareusedexceptthatpressuretransducersareanoptioninthistestmethodandrequiredinISO294-4.
【中国标准分类号】:G31
【国际标准分类号】:83_140_10
【页数】:
【正文语种】:英语