WATER-SOLUBLE FILM SEALING SOLUTIONS, RELATED METHODS, AND RELATED ARTICLES

摘要

Disclosed herein are sealing solutions for sealing water-soluble films, in particular aqueous mixtures including one or more polymeric solvents such as polyols. Aqueous sealing solutions including a relatively dilute solvent for one or more polymeric components of the water-soluble film (e.g., water-soluble polymeric components thereof, such as polyvinyl alcohol (PVOH)) can exhibit one or more benefits, including a reduction in dissolution of the film by the sealing solution and an increase in seal strength. Also disclosed are sealed articles formed with the sealing solutions, for example water-soluble packets containing various liquid or solid compositions.

主权项

1. A method for sealing a water-soluble film, the method comprising:
(a) applying a sealing solution to a first surface of a water-soluble film, the sealing solution comprising
(i) water, and(ii) a polyol having 3 or more hydroxyl groups,wherein the sealing solution has a dynamic viscosity (μs) less than 1.5 cP as measured at 20° C.; and (b) contacting a second surface of a water-soluble film with the sealing solution on the first surface for a time sufficient to form a seal between the first surface and the second surface.