▎ 摘　　要

NOVELTY - Glass polyvinyl butyral film comprises intermediate layer and polyvinyl butyral layers that are respectively arranged on both sides of intermediate layer, where the intermediate layer is obtained by adding grafted shell powder to polymer emulsion, adding melt blend of modified bentonite and polyamide-6, and finally adding ethylene-vinyl-acetate resin, after stirring, performing co-extrusion or roll forming to obtain intermediate layer, and hot-pressing middle layer and pair of polyvinyl butyral layers at 130-140degrees Celsius to form glass polyvinyl butyral film. USE - As glass polyvinyl butyral film. ADVANTAGE - The film has excellent sound insulation and UV blocking function, increases layer spacing effect, helps to block the entry of external media, and is combined with polyamide-6 to stabilize the toughness of polyvinyl butyral film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the glass polyvinyl butyral film, involving (a) adding grafted shell powder to polymer emulsion, adding 20-30% modified bentonite and polyamide 6 melt blend in total amount of polymer emulsion, and finally adding ethylene-vinyl-acetate resin with total amount of 1-2 times total amount of polymer emulsion, uniformly stirring at a rotating speed of 100-500 rpm for 20-30 minutes, uniformly stirring at 80-90degrees Celsius, and performing co-extrusion or roll-pressing molding to obtain intermediate layer, (b) hot pressing two polyvinyl butyral layers on both sides of middle layer after second step to obtain glass polyvinyl butyral film.