Dienophile additives to polyvinylidene chloride copolymers

摘要

A flexible film for use in food packaging, comprising a plurality of layers wherein a first layer comprises polyvinylidene chloride; and a dienophile additive in the first layer of polyvinylidene chloride wherein the dienophile is between about 0.05% and about 5% by weight. Particular dienophile additives include ethyl trans-cinnamate, methyl trans-cinnamate, dimethyl maleate and dibutyl maleate, wherein the dienophile additive stabilises the film.