Patent ID: 9133329
Filing Date: 2015-09-15
Classification: B65D,C08J,C08L,C11D,Y10T

Abstract:
1. A water-soluble film comprising: at least 50 wt. % of a water-soluble polyvinyl alcohol (PVOH) resin that is a vinyl alcohol-vinyl acetate copolymer consisting of vinyl alcohol and vinyl acetate units, the PVOH resin having an average viscosity in a range of about 13.5 cP to about 20 cP, and a degree of hydrolysis in a range of about 84% to about 92%, the PVOH resin comprising a blend of first and second PVOH polymers that are vinyl-alcohol-vinyl acetate copolymers consisting of vinyl alcohol and vinyl acetate units, the first PVOH polymer having a viscosity in a range of about 8 cP to about 40 cP, the second PVOH polymer having a viscosity in a range of about 10 cP to about 40 cP, and the viscosity of the first PVOH polymer being less than the viscosity of the second PVOH polymer; and the film further having no more than 30 wt. % of a PVOH polymer having a viscosity less than about 11 cP.