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Polyvinyl alcohol is used as an emulsion polymerization, as
protective colloid, to make polyvinyl acetate dispersions. This is the
largest market application in China. Some
other uses of polyvinyl alcohol include:
.Paper
adhesive with boric acid in spiral tube winding and solid board production
.Thickener,
modifier, in polyvinyl acetate glues
.Textile
sizing agent
.Paper
coatings ,release liner
.As a water-soluble film useful for packaging. An example is the envelope containing laundry detergent in "liqui-tabs".
.As
a film us10.Movie practical effect and children's
play putty or slime when combined with borax
■Agitator The agitator should be of highly effectively in agitation and heating.Any agitator that is capable of preventing the formation of lumps, and transfer heat evenly can be used for dissolving PVA. Two-blade paddle type propellers are usually used, with agitation speed of 80-100 rpm. The propeller blade should be carefully designed with care, especially for dissolving high viscosity and high solid content PVA. Propeller blade of up to 65-75% of the inside diameter of the vessel, with the propeller shaft perpendicular to the bottom, and a speed of 80-100 rpm seems to give the favorable results.