초록 ▼

A heat-shrinkable multilayer film suitable for use in the packaging of primal meat cut, includes a first outer layer comprising a blend of a propylene-ethylene copolymer, a (butene-1)-ethylene copolymer, and a thermoplastic elastomer selected from the group consisting of ethylene-propylene copolymer

A heat-shrinkable multilayer film suitable for use in the packaging of primal meat cut, includes a first outer layer comprising a blend of a propylene-ethylene copolymer, a (butene-1)-ethylene copolymer, and a thermoplastic elastomer selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene diene terpolymers; a first core layer connected to the first outer layer and being capable of being stretched during the biaxial orientation of the multilayer film and comprising an extrudable adhesive; a second core layer connected to the first core layer and serving as an oxygen barrier to protect the meat cut from spoilage and being compatible to the biaxial orienting and heat shrinking of the film; and a second outer layer comprising an ethylene vinyl acetate copolymer; the multilayer film being biaxially oriented.

대표청구항 ▼

A flexible heat-shrinkable multilayer film adapted for use in the packaging of primal meat cut, consisting essentially of a first outer layer having a thickness of from about 0.4 mil to about 1.1 mil and comprising a blend of a propylene-ethylene copolymer having a high isotactic molecular structure

A flexible heat-shrinkable multilayer film adapted for use in the packaging of primal meat cut, consisting essentially of a first outer layer having a thickness of from about 0.4 mil to about 1.1 mil and comprising a blend of a propylene-ethylene copolymer having a high isotactic molecular structure with less than about 6% by weight ethylene and having a melt flow of from about 1.5 to about 18 decigrams per minute, a (butene-1)-ethylene copolymer having a high isotactic molecular structure with less than about 10% by weight being ethylene and having a melt flow of from about 0.1 to about 5.0 decigrams per minute, and a thermoplastic elastomer selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene diene terpolymers, the ratio by weight of said propylene-ethylene copolymer to the (butene-1)-ethylene copolymer being from about 2:1 to about 1:2 and said thermoplastic elastomer being present from about 10% to about 50% by weight; a first core layer having a thickness of from about 0.2 mil to about 0.5 mil and connected to said first outer layer and being capable of being stretched during the biaxial orientation of the multilayer film and comprising an extrudable adhesive; a second core layer having a thickness of from about 0.3 mil to about 0.9 mil and connected to said first core layer and serving as an oxygen barrier to protect the meat cut from spoilage and being compatible to the biaxial orienting and heat shrinking of said film; and a second outer layer having a thickness of from about 0.7 to about 1.9 mil and comprising an ethylene vinyl acetate copolymer having a melt flow of from about 0.1 to about 1.0 decigrams per minute and having a vinyl acetate content of from about 10% to about 14% by weight; said multilayer film being biaxially oriented.