Поливинилового спирта

Productspecification: Item Hydrolysis (mol%) Viscosity (cps) Volatiles (%)max Ash (%)max PHValue PVA17-88 87.0-89.0 20.5-24.5 5.0 0.5 5-7 PVA20-88 87.0-89.0 27.0-33.0 5.0 0.5 5-7 PVA22-88 87.0-89.0 30.0-36.0 5.0 0.5 5-7 PVA24-88 87.0-89.0 40.0-48.0 5.0 0.5 5-7 PVA26-88 87.0-89.0 44.0-54.0 5.0 0.5 5-7 PVA15-99 98.0-99.3 19.0-23.0 5.0 0.5 5-7 PVA17-97 96.0-98.0 23.0-29.0 5.0 0.5 5-7 PVA17-99 98.0-99.3 25.0-31.0 5.0 0.5 5-7 PVA20-99 98.0-99.3 36.0-44.0 5.0 0.5 5-7 PVA22-97 96.0-98.0 38.0-46.0 5.0 0.5 5-7 PVA22-99 98.0-99.3 45.0-55.0 5.0 0.5 5-7 PVA24-97 96.0-98.0 47.0-57.0 5.0 0.5 5-7 PVA24-99 98.0-99.3 50.0-60.0 5.0 0.5 5-7 Properties Polyvinylalcohol(PVA)hasexcellentfilmforming,emulsifying,andadhesiveproperties.Itisalsoresistanttooil,greaseandsolvent.Itisodorlessandnontoxic.Ithashightensilestrengthand flexibility,aswellashighoxygenandaromabarrierproperties.Howeverthesepropertiesaredependentonhumidity,inotherwords,withhigherhumiditymorewaterisabsorbed. Thewater,whichactsasaplasticiser,willthenreduceitstensilestrength,butincreaseitselongationandtearstrength.PVAisfullydegradableandisaquickdissolver.PVAhas ameltingpointof230°Cand180-190 C for the fully hydrolysed and partially hydrolysed grades, respectively. It decomposes rapidly but exhibits crystallinity as the hydroxyl groups aresmallenoughtofitintothelatticewithoutdisruptingit. Application 1.Adhesiveandthickenermaterialinlatexpaints,papercoatings,releaseliner,hairsprays,shampoosandglues. 2.Textilesizingagent. 3.Carbondioxidebarrierinpolyethyleneterephthalate(PET)bottles 4.CarotidphantomsforuseassyntheticvesselsinDopplerflowtesting 5.Moviepracticaleffectandchildren'slayputtyorslimewhencombinedwithborax 6.Asamoldreleasebecausematerialssuchasepoxydonotsticktoit 7.Asfiberreinforcementinconcrete 8.Asasurfactantfortheformationofpolymerencapsulatednanobeads 9.UsedwithpolyvinylacetatetomakeElmer'sglue 10.Usedineyedropsandhardcontactlenssolutionasalubricant 11.Usedinprotectivechemical-resistantgloves 12.Usedasafixativeforspecimencollection,solutionasalubricant 13.Whendopedwithiodine,PVAcanbeusedtopolarizelight 14.Asanembolizationagentinmedicalprocess 15.PVA17-99(L) is chiefly used to produce textile sizing materials, coatings, adhesive, and it iswidelyusedforpaperprocessing, emulsifyingagents,dispersantsandblockingcolloids.Besides,itcanbeemployedasmembranes,soilmodifiers,etc. 16.PVA17-99(H is mainly usedto producetextile sizingmaterials, coatings,adhesive, acetal derivations,anditisextensivelyapplied to paper processings, emulgents, dispersants and blockingcolloids.Inaddition,itcanbeusedasmembranes,soilmodifiersandproductionmaterialsofvinylonfiber. 17.PVA1788ischieflyusedforcoatings,adhesive,dispersingagents,emulgents,textilesizingmaterials,sensitizecoatings andsoforth.