Sonoco Development Incorporated

Other

Subir K Dey

J Mark Morrow

Marion H Weatherford

David B Todd

Joseph A Biesenberger

An improved container for use in holding oxygen sensitive contents is provided. The container comprises a body having an open end sealed with a metal closure. The metal closure includes a metal structural layer, a polymeric interior coating layer and an oxygen scavenger layer interposed between the metal structural layer and the polymeric interior coating layer.

Metal closure having an oxygen scavenging interior surface

A metallized laminated structure suitable for making a rigid container having a metallic appearance is provided. The laminated structure includes a metallized film and a thermoplastic sheet. At least a portion of the thermoplastic sheet is bonded to the metallized film through a lamination process. The metallized film includes a metallic layer, a sealable layer, and a polypropylene core between the metallic layer and the sealable layer. The thermoplastic sheet includes at least one layer of a polypropylene or a thermoplastic olefin. Or the thermoplastic sheet includes at least one layer of a polypropylene and at least one layer of a thermoplastic olefin.

Metallized laminated structure and method of making a plastic article

A packaging system or container for packaging one or more oxygen-sensitive products. The container includes a wall that defines an interior for receiving one or more oxygen-sensitive products. The space between the product or products and the wall defines a headspace. The headspace is filled with an inert gas and a scavenger gas. The wall has at least an inner layer and one or more outer layers. At least one of the outer layers includes an oxidation catalyst such that as oxygen diffuses from outside the container to the interior and scavenger gas diffuses from the interior to outside the container, the diffusing scavenger gas and oxygen react together with the oxidation catalyst in one or more of the outer layers substantially consuming the oxygen.

Container and method for making container for oxygen-sensitive products

Metallized laminated structure and method of making the same

Thermoplastic foams are provided by a process in which a gaseous blowing agent of nitrogen, air, carbon dioxide, argon or mixtures thereof is injected into a melted thermoplastic polymer and the pressure is used to form a solution of the blowing agent and the melted polymer. The solution is cooled to a temperature which is within 10.degree. C. of the polymer freezing point while the pressure is held to a point within which both of the following conditions exist: A) the pressure must be high enough to keep the gas blowing agent in the solution with the melt, and B) the pressure must be low enough to avoid adding more heat to the solution. Just before the cooled solution is extruded, it is important to have the solution at a temperature which is sufficiently uniform to make: A) the thermoplastic foam at least about 65% by volume in closed cells, and B) a substantially uniform cell size in the product. The cooled solution is then extruded out of an extruder die to where the pressure drop across the die is in the range of from about 70 to about 90% of the pressure in the extruder so that a cellular product is formed.

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Florence, SC, United States of America

Subir K Dey