【英文标准名称】:StandardTestMethodforMeasurementofHexaneExtractableContentofPolyolefins
【原文标准名称】:测量聚烯烃可提取正乙烷含量的标准试验方法
【标准号】:ASTMD5227-2001(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:ethylene-propylenecopolymers;ethylene-vinylacetatecopolymers;extractables;FDA;hexane;plastics;polyethylene;solventextraction;Ethylene-propylenecopolymers;Ethylene-vinylacetate(EVA)copolymer;Extractablemattercontent;Hexaneextrac
【摘要】:FDArequirementsformaximumextractablesarespecifiedforresinanduses.Thistestmethodprovidesameanstodeterminetheamountofhexane-solublelowmolecularweightmaterialpresentinpolyolefins.Itisapplicabletoresinscontaininggreaterthan0.20%extractables.1.1Thistestmethoddescribesanextraction/gravimetricprocedurefordeterminationoftheamountofhexanesolublelowmolecularweightmaterialpresentinpolyethylene,polypropylene,ethylene-propylenecopolymers,andethylene-vinylacetatecopolymers.ThistestmethodisamodificationoftheFoodandDrugAdministration(FDA)procedurefordetermininghexaneextractablesofpolyolefins.Thistestmethodisbaseduponthepresumptionthattheweightoftheresidueextractpresentinthesolventisequaltotheamountextractedfromthefilmsampleandcouldthereforebequantifiedbymeasuringtheweightlossoftheextractedfilm,eliminatingthecomplexandtime-consumingevaporationprocessdescribedin21CFR177.1520.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Unitsusedin21CFR177.1520arealsousedinthistestmethod.UnitsareinconformancewithFederalCode21CFR177.1520,fromwhichthistestmethodisderived.Note18212;ThereisnoknownISOequivalentISOtothistestmethod.
【中国标准分类号】:G16
【国际标准分类号】:83_080_20
【页数】:4P.;A4
【正文语种】:英语


MIL-HDBK-421, MILITARY HANDBOOK COMMUNICATIONS TIMING AND SYNCHRONIZATION SUBSYSTEMS. This handbook has been prepared to assist engineers and staff planners in understanding military communications timing and synchronization characteristics found in the timing and synchronization needs of the military communications environment.