초록 ▼

A heat shrinkable multi-layer packaging film having a layer of a hydrolyzed ethylene-vinyl acetate copolymer. Preferably, the film is formed by coextruding the hydrolyzed ethylene-vinyl acetate copolymer layer between two other polymeric layers, at least one of which is cross-linkable, and thereafte

A heat shrinkable multi-layer packaging film having a layer of a hydrolyzed ethylene-vinyl acetate copolymer. Preferably, the film is formed by coextruding the hydrolyzed ethylene-vinyl acetate copolymer layer between two other polymeric layers, at least one of which is cross-linkable, and thereafter irradiating and orienting the multi-layer structure. The resulting film is heat shrinkable and has very low oxygen permeability.

대표청구항 ▼

A multi-layer packaging film having low oxygen permeability comprising: a. two polymeric layers, at least one of which comprises an olefin polymer cross-linked to the equivalent of a dosage level in the range of 2 to 12 MR; and, b. a layer between said two polymeric layers which comprises a hydrolyz

A multi-layer packaging film having low oxygen permeability comprising: a. two polymeric layers, at least one of which comprises an olefin polymer cross-linked to the equivalent of a dosage level in the range of 2 to 12 MR; and, b. a layer between said two polymeric layers which comprises a hydrolyzed ethylenevinyl acetate copolymer thereby defining a multi-layer film having at least three layers, said film having at least 10% heat shrinkage in both longitudinal and transverse directions at 195°F. A heat shrinkable multi-layer film having at least one layer which comprises a hydrolyzed ethylene vinyl acetate copolymer and a layer of crosslinked olefin polymer, said film having an oxygen transmission rate of less than 30.0 cc/m2, 24 hrs., atm. at 73°F.