NF S91-238-1996 牙科学.高聚物基牙冠和齿桥材料
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【英文标准名称】:Dentistry.Polymer-basedcrownandbridgematerials.
【原文标准名称】:牙科学.高聚物基牙冠和齿桥材料
【标准号】:NFS91-238-1996
【标准状态】:作废
【国别】:法国
【发布日期】:1996-07-01
【实施或试行日期】:1996-07-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:修复术;假牙;聚合材料;上条柄头;高聚物;颜色;牙科学;牙科设备;包装件;医学科学;牙科材料;树脂;塑料;胶接;定义;试验;作标记;规范(验收);测定;分类;桥(牙);稳定性;冠(牙)
【英文主题词】:
【摘要】:
【中国标准分类号】:C33
【国际标准分类号】:11_060_10
【页数】:15P;A4
【正文语种】:其他
【英文标准名称】:Analysisoftobaccoandtobaccoproducts;determinationofalkaloidsincigarettesmokecondensates;spectrophotometricmethod
【原文标准名称】:烟草和烟草制品的检验.香烟的烟冷凝物中的生物碱的测定.分光光度测量法
【标准号】:DIN10242-1982
【标准状态】:作废
【国别】:德国
【发布日期】:1982-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:食品;分光光度法;试验设备;试验;卷烟;烟草;烟;数学计算
【英文主题词】:testing;foodproducts;mathematicalcalculations;cigarettes;tobacco;smoke;testequipment;spectrophotometry
【摘要】:
【中国标准分类号】:X85
【国际标准分类号】:5698
【页数】:3P;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodsforDeterminingtheIzodPendulumImpactResistanceofPlastics
【原文标准名称】:测定塑料的抗悬臂摆锤式冲击性的标准试验方法
【标准号】:ASTMD256-2006a
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:电绝缘材料;冲击强度;绝缘;塑料;试验
【英文主题词】:impactresistance;Izodimpact;notchsensitivity;notchedspecimen;reversenotchimpact;
【摘要】:1.1Thesetestmethodscoverthedeterminationoftheresistanceofplasticsto"standardized"(seeNote0)pendulum-typehammers,mountedin"standardized"machines,inbreakingstandardspecimenswithonependulumswing(seeNote0).Thestandardtestsforthesetestmethodsrequirespecimensmadewithamillednotch(seeNote0).InTestMethodsA,C,andD,thenotchproducesastressconcentrationthatincreasestheprobabilityofabrittle,ratherthanaductile,fracture.InTestMethodE,theimpactresistanceisobtainedbyreversingthenotchedspecimen180intheclampingvise.Theresultsofalltestmethodsarereportedintermsofenergyabsorbedperunitofspecimenwidthorperunitofcross-sectionalareaunderthenotch.(SeeNote0.)Note0Themachineswiththeirpendulum-typehammershavebeen"standardized"inthattheymustcomplywithcertainrequirements,includingafixedheightofhammerfallthatresultsinasubstantiallyfixedvelocityofthehammeratthemomentofimpact.However,hammersofdifferentinitialenergies(producedbyvaryingtheireffectiveweights)arerecommendedforusewithspecimensofdifferentimpactresistance.Moreover,manufacturersoftheequipmentarepermittedtousedifferentlengthsandconstructionsofpendulumswithpossibledifferencesinpendulumrigiditiesresulting.(SeeSection.)Beawarethatotherdifferencesinmachinedesignmayexist.Thespecimensare"standardized"inthattheyarerequiredtohaveonefixedlength,onefixeddepth,andoneparticulardesignofmillednotch.Thewidthofthespecimensispermittedtovarybetweenlimits.Note0Resultsgeneratedusingpendulumsthatutilizealoadcelltorecordtheimpactforceandthusimpactenergy,maynotbeequivalenttoresultsthataregeneratedusingmanuallyordigitallyencodedtestersthatmeasuretheenergyremaininginthependulumafterimpact.Note0ThenotchintheIzodspecimenservestoconcentratethestress,minimizeplasticdeformation,anddirectthefracturetothepartofthespecimenbehindthenotch.Scatterinenergy-to-breakisthusreduced.However,becauseofdifferencesintheelasticandviscoelasticpropertiesofplastics,responsetoagivennotchvariesamongmaterials.Ameasureofaplastic's"notchsensitivity"maybeobtainedwithTestMethodDbycomparingtheenergiestobreakspecimenshavingdifferentradiiatthebaseofthenotch.Note0Cautionmustbeexercisedininterpretingtheresultsofthesestandardtestmethods.Thefollowingtestingparametersmayaffecttestresultssignificantly:1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ThesetestmethodsresembleISO180:1993inregardtotitleonly.Thecontentsaresignificantlydifferent.
【中国标准分类号】:G31
【国际标准分类号】:29_035_20
【页数】:20P.;A4
【正文语种】:
