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US 6,887,538 B2Granted
Barrier structure for food
AssigneeBrpp, LLC
InventorsAlan W. Denney, Linnea Brady Keen
Life of this patent
Estimating the term…
Abstract
A barrier laminate useful for the formation of orange juice and citrus beverage cartons is provided. The laminate provides a skin coat of a MDPE which provides a barrier to water vapor transmission through the laminate. The reduced water vapor flow decreases the bulge rate of the resulting carton.
Claims9
A barrier laminate comprising:
- a paperboard substrate having a first surface and a second surface, the second surface being opposite the first surface;
- a nylon barrier layer applied directly on the first surface of paperboard substrate;
- a tie layer applied to an inner surface of the nylon barrier layer;
- a medium density polyethylene barrier layer applied directly onto an inner surface of the tie layer, the medium density polyethylene barrier layer further providing a heat seal layer.
1 more element
A foldable laminated blank comprising:
- a substrate material selected from the group consisting of paper, paperboard, fiberboard, and bleached kraft paper having a first side and a second side opposite the first side;
- a nylon barrier layer attached along an outer surface directly to the first side of the substrate material;
- a product contacting surface opposite an inner surface of the nylon barrier layer, and comprised substantially entirely of a layer of MDPE, the layer of MDPE providing a heat sealable barrier.
Dependencies are inferred from the claim text.