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 having an inner and an outer surface; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said me

An oxygen barrier laminate structure for producing 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 low density polyethylene polymer coated on said outer surface of said mechanically stable structural substrate; (c) an inner layer of a first caulking polymer resin coated on said inner surface of said mechanically stable structural substrate; (d) an inner oxygen barrier material layer placed on the inner surface of said caulking polymer resin; (e) a first sandwich layer of a second calking polymer resin and a low density polyethylene polymer coated on the inner surface of said oxygen barrier material layer wherein said caulking polymer resin contacts said oxygen barrier material layer; (f) a second sandwich inner layer of: a first layer of a low density polyethylene polymer, a first adhesive tie layer, a layer of an ethylene vinyl alcohol copolymer, a second adhesive tie layer, and a second layer of a low density polyethylene polymer, all coated in the above-listed sequence onto the inner surface of said first sandwich layer of caulking polymer resin and low density polyethylene and contacting said low density polyethylene layer; and (g) a product contact layer of low density polyethylene polymer extrusion coated on the inner surface of said inner second sandwich layer which can be heat-sealed with the outside layer of low density polyethylene polymer of the laminate on conventional equipment at temperatures ranging from 250°F. to 500°F.