Production process of waterproof polyving akohol film and application for obtaining waterproof polyving akohol film

The invention discloses a production process of a waterproof polyving akohol film. At present, an aqueous solution salivate method for producing the polyving akohol film has the disadvantage of higher energy consumption cost, and a better waterproof film is difficult to obtain with a melt extrusion method. Polyving akohol and other raw material components are subjected to mix swelling, extrusion, salivation, drying, heat treatment, edge cutting and rolling processes sequentially to form the waterproof polyving akohol film; the mix swelling process comprises that all raw material components are stirred and mixed in a hot mixing machine with jacket heating after weighted; at mixing endpoint, obtained polyving akohol particles are swelled into an elastic, non-adhesive and transparent jelly shape, and no free moisture exists among particles. Polyving akohol resin absorbs moisture to swell through heating and mixing, so that the melting temperature of the polyving akohol resin is reduced, the energy consumption in the production process can be reduced greatly, and a plasticizer can be reduced or even isn't used.