Smokable thermoplastic casing

摘要

A novel smokable thermoplastic film, smokable by both liquid smoke and gaseous smoke, that may be produced as a film or a tube, as in a food casing. This newly disclosed film is a blend of a polyamide base, an amorphous polyvinyl alcohol and, optionally, an antiblocking agent.

主权项

1. A smokable, heat-shrinkable film useable for food packaging, the film comprising:
(i) at least one hydrophilic, copolyvinyl alcohol resin with a high amorphous content, in amounts of from about 20 wt. % to about 70 wt. %, based on the weight of the film,
wherein the copolyvinyl alcohol resin comprises(A) a poly vinyl alcohol (“PVA”) resin having a 1,2-diol structural unit represented by the following general formula: and having a saponification degree of 80 to 97.9 mol-%; and(B) an alkylene oxide adduct of a polyvalent alcohol containing 5 to 9 moles of an alkylene oxide per 1 mole of the polyvalent alcohol;(ii) at least one polyamide, in amounts of from about 30 wt. % to about 80 wt. %, based on the weight of the film; and
a) wherein the polyamide is aliphatic or a blend of aliphatic and amorphous polyamide; and(iii) optionally, at least one antiblock agent, in amounts of from about 3 wt. % to about 5 wt. %, based on the weight of the film;and that allows the transfer of both liquid and gaseous smoke through the film.