【英文标准名称】:Textileglassreinforcedplastics;determinationofvoidcontent;lossonignition,mechanicaldisintegrationandstatisticalcountingmethods
【原文标准名称】:玻璃纤维增强塑料孔隙率的测定烧失量、机械粉碎和静态计数法
【标准号】:ISO7822-1990
【标准状态】:现行
【国别】:国际
【发布日期】:1990-09
【实施或试行日期】:1990-09-01
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:玻璃织物;气孔;数量密度;试验;塑料
【英文主题词】:Annealinglosses;Blowholes;Compositematerials;Deterioration;Determination;Glass-fibrereinforcedplastics;Ignition-losstests;Interpretations;Numberdensity;Plastics;Testing;Textileglassfibres;Wovenglassfibres
【摘要】:ThisInternationalStandardspecifiesthreemethodsforthedeterminationofthevoidcontentoftextileglassreinforcedplasticsorcomposites,ofwhichtheconstituentsareofasolidnature.1MethodA-LossonignitionThismethodisapplicabletocompositesforwhichtheeffectsofthelossonignitiontestonthematerialsareknown.Mostmatrixresinsandtextileglassfibrereinforcementsfallintothisclass.Themethodisnotapplicabletocompositesforwhichtheef-fectsofthelossonignitiontestontheresin,thereinforcement,andanyfillersareunknown.Thismayincludesiliconeresins,whichdonotburnoffcompletely,andfillersconsistingofox-ides,carbonates,etc.,whichmaygainorloseweight.Notethatseparateweightlosstestsonindividualmaterialswillusually,butnotnecessarily,givethesameresultaswhenallthematerialsarecombined.Theaccuracyofthemethodis±2,5%byvolume.2MethodB-MechanicaldisintegrationThismethodisapplicableifthecompositecanbedisintegratedinsuchaway,forexamplebycrushinginapress,thatalltheenclosedvoidsareconnectedwiththeoutsideofthecom-positematerial.Themethodisdestructiveandhaslimitedap-plicationifthematrixmaterialshowsductilebehaviourundercompression,unlessitcanbemademorebrittleinanartificialway(forexamplebycooling).Themethodisespeciallysuitablewhenthedensitiesofthecon-stituentmaterialsarenotknownornotdeterminable.Themethodneglectstheinfluenceofanyvolatileconstituentsthatcouldevaporateduringandafterdisintegration.Inthisconnection,theconditioningshallbechosenwithcare.Themethodalsodoesnottakeintoaccountanycutorexposedvoidsatthesurfaceofthesample.Theaccuracyofthemethodis±1%byvolume.3MethodC-StatisticalcountingThismethodisapplicabletocompositeshavingavoidcontentlessthanorequalto1%byvolume.
【中国标准分类号】:G31
【国际标准分类号】:83_120
【页数】:8P;A4
【正文语种】:英语