American Can Company

Jack E Knott, Ii

Thomas Walter Odorzynski

Suzanne E Schaefer

James Chi-Hwi Wang

Matthew S Koschak

John P Adams

An EVOH copolymer blend is extrudable to produce films of uniform caliper and excellent oxygen barrier properties. Aromatic sulfonamides are desirably utilized as plasticizers, and superior composite films including a layer of the plasticized EVOH are produced.

Plasticized EVOH and process and products utilizing same

This invention is a multiple layer packaging film in which the outer polymeric layers cooperate to achieve, between themselves, a relatively constant coefficient of friction differential, a fin seal capability, and a lap seal capability; even after the film is stored in wound-up roll form.

Multiple layer packaging film

This application is concerned with food packages made from sheet or film into the forms of heat sealable pouches, bags, or covered trays in which the food product is placed, the package sealed, and the packaged food processed in a pressure cooker or retort to permit the packaged food to be stored without refrigeration. Certain food products can be rendered commercially sterile by hot filling the package at temperatures below boiling to permit storage for long periods without refrigeration. While still in the sealed package of the present invention, the consumer can heat or cook the food by immersion in boiling water or by microwave oven. The sheet or film is a multilayer construction wherein each layer performs specific functions and the choice of materials for the layers is interdependent to provide a film structure having all desired properties at the least cost.

Package for food products

The addition of a small amount of a phenol to an ethylene-vinyl alcohol oxygen-barrier layer significantly improves oxygen impermeability under high humidity conditions.

Ethylene-vinyl alcohol with phenol additive

A blend of nylon and ethylene vinyl alcohol copolymer is provided which is suitable for conversion into films having desirable levels of strength and toughness, and good oxygen barrier properties. In addition, the blend exhibits enhanced adhesive qualities, as compared to films of EVOH copolymer per se, thus better adapting it for use in multilayer films. Methods for fabricating the resin blend into bare and composite films are also provided.

Polyamide/polyethylene copolymer film and method for producing

Ethylene-vinyl alcohol copolymer gas barrier layer with phenol additive

A delamination resistant multi-layer film comprises a core layer of vinyl alcohol polymers or copolymers such as polyvinyl alcohol or ethylene vinyl alcohol. Adhered to the core layer are one or more layers of a partially hydrolyzed vinyl acetate polymer or copolymer having functional groups in the polymer such that strong adhesion to the core layer is obtained. The core layer provides an excellent oxygen barrier, while the adjacent layers protect the core layer from degradation by exposure to water vapor. Additional layers of various polymer materials may be provided over the layers of partially hydrolyzed vinyl acetate. The film can be prepared by coextrusion techniques.

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Appleton, WI, United States of America

Jack E Knott, Ii