초록 ▼

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layer

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts, or cracking of the barrier layers during blank conversion, package formation, and package distribution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

대표청구항 ▼

An oxygen barrier laminate structure for an oxygen impermeable leak free container comprising: (a) a mechanically stable structural substrate having an inner and an outer surface; (b) an outer layer of a heat-sealable polymer material coated on the outer surface of said mechanically stable structura

An oxygen barrier laminate structure for an oxygen impermeable leak free container comprising: (a) a mechanically stable structural substrate having an inner and an outer surface; (b) an outer layer of a heat-sealable polymer material coated on the outer surface of said mechanically stable structural substrate; (c) a first layer of caulking polymer resin coated on the inner surface of said mechanically stable structural substrate; (d) an oxygen barrier material layer coated on the inner surface of the first caulking polymer resin layer; (e) a sandwich layer of a second caulking polymer resin layer, an abuse-resistant polymer resin layer, a third caulking polymer resin layer, all coextruded in that sequence onto the interior surface of the oxygen barrier material layer; and (f) an inner heat-sealable product contact polymer material layer extrusion coated on the inner surface of the third caulking polymer resin layer, which is heat-sealable with the outer layer of polymer material on conventional equipment at temperatures ranging from 250°F. to 500°F. and wherein said first, second and third caulking polymer resins are selected from the group consisting of salts of ethylene methacrylic acid copolymers, ethylene vinyl acetate copolymers, ethylene methacrylate copolymers and ethylene based graft copolymers.