作者:标准资料网 时间:2024-05-14 10:39:23   浏览:8574   来源:标准资料网

【英文标准名称】:StandardPracticeforUseofaMeltIndexStrandforDeterminingDensityofPolyethylene
【原文标准名称】:利用熔体指数纤维测定聚乙烯密度的标准实施规程
【标准号】:ASTMD2839-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.15
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:density;meltindexstrand;PE;polyethylene;Polyethylene(PE);Meltindex;Density--plastics
【摘要】:ThispracticehasbeenfoundtobeveryusefulforpreparingpolyethylenesamplessuitablefordeterminationofdensitybyTestMethodD1505,forqualitycontrolpurposes,especiallyinaresinmanufacturingfacilitywherefast,reproducible,comparativeresultsareneeded.Itisnotnecessarilyrecommendedforresinspecificationsthatarepartofasalescontractbetweenthebuyerandtheseller.Thedensityofapolyethylenesampleishighlydependentonthepreparationandthermalhistoryofthespecimens.ThelevelofdensityresultsobtainedbythispracticeofsamplepreparationdiffersfromthatobtainedbyothermethodsasdescribedinPracticeD4703,AnnexA1.Beforeproceedingwiththispractice,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orsomecombinationthereof,coveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthispractice.Iftherearenomaterialspecifications,thedefaultconditionsapply.1.1ThispracticecoversthepreparationofasampleforpolyethylenedensitydeterminationinaccordancewithTestMethodD1505.ThesampleconsistsofastrandproducedbyextrusionofthepolyethyleneinaccordancewithTestMethodD1238,Condition190/2.16(MeltIndex).1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoknownISOequivalenttothisstandard.Note28212;TheprecisiondataondensitiesmeasuredusingthissamplepreparationpracticeislistedinTestMethodD1505.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:3P.;A4
【正文语种】:英语