Glossary of Plastics Industry Terms

《Glossary of Plastics Industry Terms》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、GlossaryofPlasticsIndustryTermsAbsoluteViscosityThetangentialforceonunitareaofeitheroftwoparallelplanesatunitdistanceapartwhenthespacebetweentheplanesisfilledwiththefluidinquestionandoneoftheplanesmoveswithunitdifferentialvelocityinitsownplane.TheC.G.S.unitforabsolute(ordynamic)viscosityispoise(dyn

2、e-sec./sq.cm.).Centipoise(0.01)isoftenused.AcceleratorAsubstancethathastensareaction,particularlyonewhichspeedsupthevulcanizationofrubber.AlsoknownasPromoter.AccumulatorAtermusedmainlywithreferencetoblowmoldingequipmentwhichdesignatesanauxiliaryreamextruderwhichisusedtoprovideextremelyfastparisonde

3、livery.Theaccumulatorcylinderisfilledwithplasticatedmeltcomingfromtheextruderbetweenparisondeliveriesor"shots"andisstoredor"accumulated"untiltheplungerisrequiredtodeliverthenextparison.AcrylicResinAsyntheticresinpreparedfromacrylicacidorfromaderivativeofacrylicacid.AcrylonitrileAmonomerwiththestruc

4、ture(CH2:CHCN).Itismostusefulincopolymers.Itscopolymerwithbutadieneisnitrilerubber,andseveralcopolymerswithstyreneexistthataretougherthanpolystyrene.Itisalsousedasasyntheticfiberandasachemicalintermediate.AcrylonitrileButadieneStyrene(abbreviatedABS)Acrylonytrileandstyreneliquidsandbutadienegasarep

5、olymerizedtogetherinavarietyofratiostoproducethefamilyofABSresins.AdhesionPromoterAcoatingwhichisappliedtothesubstratebeforeitisextrusioncoatedwiththeplasticandwhichimprovestheadhesionoftheplastictothesubstrate.AdhesiveAsubstancewhichappliedasanintermediateiscapableofholdingmaterialstogetherbysurfa

6、ceattachment.AffinityTheattractionforanothersubstance.AgingThechangeofamaterialwithtimeunderdefinedenvironmentalconditions,leadingtoimprovementordeteriorationofproperties.AirGapInextrusioncoating,thedistancefromthedieopeningtothetipformedbythepressurerollandchillroll.AirRingAcircularmanifoldusedtod

7、istributeanevenflowofthecoolingmedium,air,ontoahollowtubularformpassingthroughthecenterofthering.Inblowntubing,theaircoolsthetubinguniformlytoprovideuniformfilmthickness.Air-assistFormingAmethodofthermoform