Patent ID: 7267862

Claim:
A thin polymer film comprising: one or a blend of non-polyolefin resins comprising any of polyamide 6, polyamide 6,6, or polyester terephthalate resins, forming a layer having opposed first and second surfaces, and a migratory additive comprising a blend of secondary amides about 1 part oleyl palmitamide and 1 part stearyl erucamide; and further comprising between 25 ppm and 5000 ppm of a primary amide of general structure R—CO—NH2 and between 25 ppm and 5000 ppm of at least one secondary amide of general structure R—CO—NH—R′, wherein the R and R′ can include any of erucic, oleic, palmitic, behemic, capric, lauric or stearic functional groups of between 9 to 30 carbon atoms, such that the ratio of primary amide to secondary amide is between about 1:1 and 1:3.