초록 ▼

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, fa

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.

대표청구항 ▼

[ We claim:] [1.] A process for manufacturing a heat-sealable paperboard laminate having enhanced gas barrier properties and improved resistance to the migration of essential oils, flavors and vitamins comprising:(a) selecting a base material comprising a paperboard substrate having a layer of heat-

[ We claim:] [1.] A process for manufacturing a heat-sealable paperboard laminate having enhanced gas barrier properties and improved resistance to the migration of essential oils, flavors and vitamins comprising:(a) selecting a base material comprising a paperboard substrate having a layer of heat-sealable low density polyethylene polymer on one side of the paperboard to provide one outer surface of the laminate;(b) coextruding over the other surface of the paperboard substrate a sandwich layer comprising a first adhesive tie layer, an amorphous nylon layer and a second adhesive tie layer wherein the amorphous nylon is a hexamethyleneisothalamide hexamethylene terephathalamide copolymer, and(c) extruding a layer of heat-sealable low density polyethylene polymer over the sandwich layer to provide the other outer surface of the laminate; wherein a paperboard container made from said laminate having the amorphous nylon layer results in substantially similar vitamin C retention as a paperboard container with an ethylene vinyl alcohol barrier layer.