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1、TheMechanismandCharacteristicsofDry-JetWet-SpinningofAcrylicFibersQiunBaojun,PanDing,andWuZhenqiouMan-MadeFiberResearchAssociationChinaTextileUniversityShanghai,China~INTRODUCTIONInliteraturetherewerealreadyanumberofreportsconcerningtheeffectsofspinningvariables
2、ontheThetechnologicalcharacteristicsofthedry-jetwetstructureandpropertiesofacrylicfiberformedbythespinningofacrylicfiberslieinthefactthatsmallwet-spinningmethod.*-'Astodry-jetwetspinning,streamsofdopeextrudedfromthedieareallowedtorelativelyfewpaperscanbefo~nd.~.
3、~passfirstthroughashortdistanceofairgapbeforeDry-jetwetspinningisaprocessoftechnicalim-enteringthespinningbathforfullcoagulation.Thisportance.Ithasbeensuccessfullyappliedtothefor-processofformingfiberscleverlycombinesthead-mationofthehighperformancefiberKelvar;i
4、tcanvantagesofdryspinningwiththatofwetspinning;alsobeusedinthespinningofotherfibers,likeacrylici.e.,itpossessestheadvantagesofhighspeedoffor-yamoflowfilamentdenierandwithverylittlevoidmation,highconcentrationofdope,andhighdegreecontent.ofjetstretchthatusuallycha
5、racterizethedrymethodThemechanismofformationofpear-orfinger-ofspinning,butitstillretainsthecapabilityofcon-shapedvoidsbywetspinningisaproblemthathastrollingthestructureofas-spunfibersbyadjustmentbeenstudiedratherthoroughlybydifferentau-ofspinningbathparameters.t
6、h~rs.'&'~SuchvoidswillusuallycollapseupondryingAdvancesinPolymerTechnology,Vol.6,No.4,509-529(1986)I01986byJohnWiley&Sons,Inc.CCC0730-6679/86/040509-21$04.00SPINNINGOFACRYLICFIBERSoftheas-spunfiber,buttheirremainswillusuallyImmediatelyafterthedieswell,thestreamc
7、anbeexertdetrimentaleffectsonthepropertiesofthefiber,rapidlyattenuated.Therestofthejetstretchwhichliketransparency,andcauseeasyfibrillationofthecannotbeconsiderableinthiscaseoccursafterthefiber.finestreamhasbeenimmersedintothebath.TheTheaimofthispaperistocompare
8、themorpho-capacityofhighjetstretchintheairgapisthecauselogicalstructureoftheresultingfibersformedbytheofincreaseofspinningspeedduringdry-jetspinning.twomethodsofspinn
