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 producing an oxygen impermeable leak free container comprising: (a) a mechanically stable structural substrate; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on the outer surface of said mechanically stable structural substrate

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