Back to results
US 6,149,993 AGranted
Oxygen and flavor barrier laminate including amorphous nylon
AssigneeWestvaco Corporation
InventorsChristopher J. Parks, Debora F. Massouda
Life of this patent
Estimating the term…
Abstract
A non-foil composite laminate for an improved container providing an effective barrier for the containment of essential oils and prevention of losses of vitamin C. The non-foil composite laminate comprises an inner barrier layer of amorphous nylon and outer layers of heat sealable olefin polymer, facilitating manufacture while retaining desirable barrier properties.
Claims19
A paperboard container having an outer surface and an inner product contact surface comprising:
- (a) a paperboard substrate;
- (b) a layer of heat-sealable olefin polymer on one side of the paperboard substrate to provide the outer surface of the container;
- (c) an inner sandwich layer on the other side of the paperboard substrate comprising, in sequence, a first tie layer, an amorphous nylon layer and a second tie layer;
- and
- (d) a layer of heat sealable olefin polymer on the same side of the paperboard substrate as the inner sandwich layer to provide the inner product contact surface of the container whereby the amorphous nylon layer results in enhanced vitamin C retention.
2 more elements
A paperboard container having an outer surface and an inner product contact surface comprising:
- (a) a paperboard substrate;
- (b) a layer of heat-sealable olefin polymer on one side of the paperboard substrate to provide the outer surface of the container;
- (c) an inner sandwich layer on the other side of the paperboard substrate comprising, in sequence, a first tie layer, an amorphous nylon barrier layer, and a second tie layer;
- and
- (d) a layer of heat sealable olefin polymer on the same side of the paperboard substrate as the inner sandwich layer to provide the inner product contact surface of the container whereby the amorphous nylon barrier layer results in substantially similar vitamin C retention as a paperboard container with an ethylene vinyl alcohol barrier layer.
2 more elements
Dependencies are inferred from the claim text.