【英文标准名称】:StandardTestMethodforDeterminationofMoistureinPlasticsbyRelativeHumiditySensor
【原文标准名称】:相对湿度传感器法测定塑料中的水分含量的标准试验方法
【标准号】:ASTMD7191-2010
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:moisturedetermination;plastics;Sensors;Moistureanalysis;Plastics;Relativehumidity(RH)
【摘要】:Thistestmethodisintendedforuseasacontrol,acceptance,andassessmenttest.Moisturecanseriouslyaffecttheprocessabilityofplastics.Itispossiblethathighmoisturecontentwillcausesurfaceimperfections(thatis,splayorbubbling)ordegradationbyhydrolysis.Lowmoisture(withhightemperature)hasbeenknowntocausesolidphasepolymerization.Thephysicalpropertiesofsomeplasticsaregreatlyaffectedbythemoisturecontent.1.1Thistestmethodcoversthequantitativedeterminationofwaterdownto20ppminplasticsusingarelativehumiditysensor.1.2ValuesstatedinSIunitsaretoberegardedasstandard.1.3Specimenstestedinthistestmethodcanreachorexceed250x00B0;C,usecautionwhenhandlingthemaftertestinghascompleted.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoknownISOequivalenttothisstandard.
【中国标准分类号】:G31
【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】:Hand-andmachine-operatedcircularscrewingdiesforparallelpipethreads-Gseries
【原文标准名称】:圆柱管螺纹的手动和机动圆板牙G系列
【标准号】:ISO4231-1987
【标准状态】:现行
【国别】:国际
【发布日期】:1987-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:管螺纹;作标记;尺寸;机床;原动机;圆柱形;G-系列螺纹;攻丝刀具;螺纹板牙;板牙;手工工具;平行螺纹;切削工具;机动工具;圆形;工具;螺纹
【英文主题词】:Circularshape;Cuttingtools;Cylindricalshape;Dies(threading);Dimensions;G-seriesscrewthreads;Handtools;Machinetools;Marking;Parallelthreads;Pipethreads;Primemovers;Screw-cuttingtools;Threadingtools;Threads;Tools
【摘要】:Thissecindeditioncancelsandreplacesthefirstedition(ISO4231:1977).IsasupplementtoISO2568andISO4230andlysdownthediemensionsofthesescrewingdiesintendedforproductionofparallelpipethreadsinaccordancewithISO228-1.Diameter,thicknessandfixingdimensionsareaccordancewithISO2568soastopermitthedrivingofand-oprateddieswiththeaidofthediestocksdefinedinthatdocument.
【中国标准分类号】:J41
【国际标准分类号】:25_100_50
【页数】:2P;A4
【正文语种】:英语