ASTM D828-1997(2002) 用恒速拉伸设备进行纸和纸板抗扯裂强度的标准试验方法

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【英文标准名称】:StandardPracticeforExtractionofMedicalPlastics
【原文标准名称】:医用塑料制品萃取的标准实施规程
【标准号】:ASTMF619-2003(2008)
【标准状态】:现行
【国别】:美国
【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】:F04.16
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:biocompatibility;extraction;liquids;plastics;specimensize;Biocompatibility;Extractionmethods;Materialextracts(inbiomedicalmaterials);Plasticsurgicaldevices/applications
【摘要】:Theseextractionproceduresaretheinitialpartofseveraltestproceduresusedinthebiocompatibilityscreeningofplasticsusedinmedicaldevices.Thelimitationsoftheresultsobtainedfromthispracticeshouldberecognized.Thechoiceofextractionvehicle,durationofimmersion,andtemperatureofthetestisnecessarilyarbitrary.Thespecificationoftheseconditionsprovidesabasisforstandardizationandservesasaguidetoinvestigatorswishingtocomparetherelativeresistanceofvariousplasticstoextractionvehicles.Correlationoftestresultswiththeactualperformanceorserviceabilityofmaterialsisnecessarilydependentuponthesimilaritybetweenthetestingandend-useconditions(see12.1.2andNote4).Cautionshouldbeexercisedintheunderstandingandintentofthispracticeasfollows:Noallowanceordistinctionismadeforvariablessuchasend-useapplicationanddurationofuse.DecisionsonselectionofteststobedoneshouldbemadebasedonPracticeF748.Thispracticewasoriginallydesignedforusewithnonporous,solidmaterials.Itsapplicationforothermaterials,suchasthosethatareporous,orabsorptive,orresorptive,shouldbeconsideredwithcaution.Considerationshouldbegiventoalteringthespecifiedmaterialtoliquidratiotoallowadditionalliquidtofullyhydratethematerialandadditionalliquidorothermethodstofullysubmergethetestarticle.Additionalproceduresthatfullyremovetheextractliquidfromthetestarticle,suchaspressureorphysicallysqueezingthematerial,shouldalsobeconsideredasappropriate.Althoughnodefinitionsaregiveninthispracticeforthefollowingterms,suchitemsasextractionvehiclesurfacetensionatthespecifiedextractionconditionandplasticspecimenphysicalstructureshouldbetakenintoaccount.TestMethodsD543,D570,andD1239maybeusefulinprovidingsupplementalinformation.1.1Thispracticecoversmethodsofextractionofmedicalplasticsandmaybeapplicabletoothermaterials.Thispracticeidentifiesamethodforobtainingx201C;extractliquidx201D;foruseindeterminingthebiologicalresponseinpreclinicaltesting.Furthertestingofthex201C;extractliquidx201D;isspecifiedinotherASTMstandards.Theextractmayundergochemicalanalysisaspartofthepreclinicalevaluationofthebiologicalresponse,andthematerialafterextractionmayalsobeexamined.1.2Thispracticemaybeusedfor,butisnotlimitedtothefollowingareas:partialevaluationofrawmaterials,auditingmaterialswithinthemanufacturingprocess,andtestingfinalproducts.Thispracticemayalsobeusedasarefereemethodforthemeasurementofextractablesinplasticsusedinmedicaldevices.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:83_080_01
【页数】:4P.;A4
【正文语种】:英语


【英文标准名称】:Informationtechnology-3,81mmwidemagnetictapecartridgeforinformationinterchange-Helicalscanrecording-DDSformat
【原文标准名称】:信息技术.信息交换用3.81mm宽磁带盒.螺旋式扫描记录.DDS格式
【标准号】:BSISO/IEC10777-1992
【标准状态】:现行
【国别】:英国
【发布日期】:1992-02-28
【实施或试行日期】:1992-02-28
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:剥离试验;合格;磁带;尺寸;盖;试验条件;透射率;记录设备;运输;信息块格式;延伸;孔;数据布置;盒式磁带;数据介质;光学测量;信息交流;抗拉强度;磁带机;数据媒体;信号电平;杯突试验;电阻;试验设备;电波测量;记录特性;记录道;屈服强度;互换性;传输;断裂荷载;工作环境;记录设备部件
【英文主题词】:Cassettes(magnetictapes);Datalayout;Datamedia;Dataprocessing;Datarecording;Datastorage;Dimensions;Informationexchange;Informationinterchange;Informationtechnology;Interchangeability;Magneticrecording;Magnetictapes;Replaceability;Specifications
【摘要】:Specifiesphysicalandmagneticcharacteristicsofsuchcartridgesandthequalityoftherecordedsignal,theformatandtherecordingmethod,therebyallowingdatainterchangebymeansofsuchmagnetictapecartridges.
【中国标准分类号】:L64
【国际标准分类号】:35_220_20
【页数】:116P.;A4
【正文语种】:英语