MULTILAYER PACKAGING FILM CONTAINING FIRST AND SECOND LAYERS INCLUDING CRYSTALLINE NYLON AND A THIRD LAYER THEREBETWEEN WITH A MODULUS LOWER THAN THAT OF CRYSTALLINE NYLON

摘要

A multilayer film having a first layer including a blend of a crystalline nylon and a material which disrupts the crystallinity of the crystalline nylon; a second layer also including this blend; and a third layer, between the first and second layers, including a material having a modulus lower than the modulus of the crystalline nylon, and having a crystallinity of less than 60%. The nylon blend layers add toughness, stiffness and elastic recovery to the film and the material with relatively low modulus and crystallinity aids in orientation of the film during manufacture, permitting the use of a higher content of crystalline nylon than would be practical if only a single nylon layer was used.