【英文标准名称】:StandardTestMethodforAirPermeabilityofTextileFabrics
【原文标准名称】:纺织纤维透气率的标准试验方法
【标准号】:ASTMD737-2004(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:D13.59
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airpermeability;fabric;Airbagmaterials/applications;Airpermeance/permeability;Blankets;Heavily-sizedtextilefabrics;Knittedtextilefabrics;Nappedfabrics;Nonwoventextilefabrics;Pilefabrics;Resin-treatedtextilefabrics;Textilefabrics
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentssincecurrentestimatesofbetween-laboratoryprecisionareacceptable,andthistestmethodisusedextensivelyinthetradeforacceptancetesting.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,ensurethetestsamplestobeusedareashomogeneousaspossible,aredrawnfromthematerialfromwhichthedisparatetestresultswereobtained,andarerandomlyassignedinequalnumbertoeachlaboratoryfortesting.Thetestresultsfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifbiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Airpermeabilityisanimportantfactorintheperformanceofsuchtextilematerialsasgasfilters,fabricsforairbags,clothing,mosquitonetting,parachutes,sails,tentage,andvacuumcleaners.Infiltration,forexample,efficiencyisdirectlyrelatedtoairpermeability.Airpermeabilityalsocanbeusedtoprovideanindicationofthebreathabilityofweather-resistantandrainprooffabrics,orofcoatedfabricsingeneral,andtodetectchangesduringthemanufacturingprocess.Performancespecifications,bothindustrialandmilitary,havebeenpreparedonthebasisofairpermeabilityandareusedinthepurchaseoffabricswherepermeabilityisofinterest.Constructionfactorsandfinishingtechniquescanhaveanappreciableeffectuponairpermeabilitybycausingachangeinthelengthofairflowpathsthroughafabric.Hotcalendaringcanbeusedtoflattenfabriccomponents,thusreducingairpermeability.Fabricswithdifferentsurfacetexturesoneithersidecanhaveadifferentairpermeabilitydependinguponthedirectionofairflow.Forwovenfabric,yarntwistalsoisimportant.Astwistincreases,thecircularityanddensityoftheyarnincreases,thusreducingtheyarndiameterandthecoverfactorandincreasingtheairpermeability.Yarncrimpandweaveinfluencetheshapeandareaoftheintersticesbetweenyarnsandmaypermityarnstoextendeasily.Suchyarnextensionwouldopenupthefabric,increasethefreearea,andincreasetheairpermeability.Increasingyarntwistalsomayallowthemorecircular,high-densityyarnstobepackedcloselytogetherinatightlywovenstructurewithreducedairpermeability.Forexample,aworstedgabardinefabricmayhavelowerairpermeabilitythanawoolenhopsackingfabric.1.1Thistestmethodcoversthemeasurementoftheairpermeabilityoftextilefabrics.1.2Thistestmethodappliestomostfabricsincludingwovenfabrics,nonwovenfabrics,airbagfabrics,blankets,nappedfabrics,knittedfabrics,layeredfabrics,andpilefabrics.Thefabricsmaybeuntreated,heavilysized,coated,resin-treated,orotherwisetreated.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_30
【页数】:5P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 梯形螺纹量规 技术条件 |
| 英文名称： | Tolerances and general features of gauges for metric trapezoidal screw threads |
| 中标分类： |
机械 >>
工艺装备 >>
量具与量仪 |
| ICS分类： |
|
| 替代情况： | GB/T 8124-1987 |
| 发布部门： | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
| 发布日期： | 2004-02-10 |
| 实施日期： | 2004-08-01 |
| 首发日期： | 1987-08-10 |
| 作废日期： | 1900-01-01 |
| 主管部门： | 中国机械工业联合会 |
| 提出单位： | 中国机械工业联合会 |
| 归口单位： | 全国量具量仪标准化技术委员会 |
| 起草单位： | 哈尔滨量具刃具厂 |
| 起草人： | 武英、高善铭、姚绪里、刘永发、朱鸿杰 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2004-08-01 |
| 页数： | 16开， 页数：16， 字数：30千字 |
| 书号： | 155066.1-21018 |
适用范围
本标准规定了牙型角为30°，公称直径为8mm至300mm，螺距为1．5mm至44mm的梯形螺纹量规的术语和定义、分类、符号、牙型、公差、要求、检验、标志与包装等。本标准规定的梯形螺纹量规适用于检验GB/T5796—1986规定的单线梯形螺纹。
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引用标准
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所属分类： 机械 工艺装备 量具与量仪