Westvaco Corporation

Debora F Massouda

Christopher J Parks

Todd H Huffman

Harry B Casey

Thomas S Williams, Iii

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.

Oxygen and flavor barrier laminate including amorphous nylon

A heat-sealable paperboard laminate for liquid packaging which does not transmit nor absorb oxygen or flavor and odor ingredients comprises paperboard sandwiched between two layers of heat-sealable low density polyethylene polymer (LDPE) and including a three-component product-contact barrier layer coextruded onto the inner layer of LDPE. The barrier layer comprises ethylene vinyl alcohol copolymer (EVOH)/a tie layer (Plexar 177 or 175)/ low density polyethylene polymer (LDPE).

Oxygen and flavor barrier laminate for liquid packaging

A laminate for blister pack applications is comprised of a paperboard substrate having a first printable surface and a second surface onto which there is applied a polymeric coating suitable for adhering the plastic blister to the paperboard. The polymeric coating comprises a coextrusion consisting of a polyolefin material such as low density polyethylene (LDPE) which gives good adhesion to the paperboard surface and an adhesive material such as an ethylene-methyl acrylate copolymer (EMA) which gives good adhesion to the plastic blister.

Paperboard/polymer laminate for blister pack

A process is disclosed for preparing a high quality paperboard product with high brightness and a defect-free glossy surface. The product comprises a structure consisting essentially of a paperboard substrate onto one surface of which there is first applied a coating of a pigmented polyolefin and a subsequent coating of a clear polymeric material such as a polyester. The brightness and loss achieved for the paperboard product is superior to conventional coated paperboard, cast coated paperboard, or other laminated paperboards currently in use.

Process for producing a paperboard product for premium packaging

A non-foil paperboard laminate having excellent flavor barrier with superior heat sealability comprises paperboard having a layer of a heat-sealable, modified polyolefin extrusion coated onto its outer surface, a layer of low density polyethylene polymer extrusion coated onto its inner surface, and a product-contact barrier layer extrusion coated onto the inner layer of low density polyethylene polymer. The product-contact barrier layer may comprise one or more layers of a polymer having low permeability to flavor oils.

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Silver Spring, MD, United States of America

Debora F Massouda