Abstract:
The present invention provides a multilayer film having an active oxygen barrier multilayer core comprising at least one of 1) an active oxygen barrier layer is sandwiched between two passive oxygen barrier layers, or 2) a passive oxygen barrier layer is sandwiched between two active oxygen barrier layers. In one embodiment, the active barrier layer comprises a composition that is a blend of a thermoplastic resin (A) having carbon-carbon double bonds substantially in its main chain, a transition metal salt (B), and an oxygen barrier polymer (C). In some embodiments the active barrier layer may also include a compatibilizer (D). The passive oxygen barrier layers help to maintain the oxygen barrier properties of the multilayer film after the oxygen absorbing capacity of the active barrier layer has been exhausted. As a result, the useful shelf life of the film can be extended.
Abstract:
The zipper (10) includes flanges (12,14) which include an oxygen scavenging polymer. The oxygen scavenging polymer can be a co-extruded layer or blended with other polymers. The oxygen scavenging polymer is activated by ultra-violet light prior to installation by a form fill seal apparatus. This zipper is particularly useful in reducing residual oxygen in the packaging of such food products as cheese and meat, thereby extending the shelf life.
Abstract:
Packages (10) and structures (50) with selective dosing of active agents are described. The at least one active agent includes a freshness-extension agent to inhibit spoilage of perishable product disposed in the package (10), an odor management agent to reduce, mask, or neutralize odors from garbage or waste disposed in the package (10), a color indicator to indicate the status of one or more other active agents, or another type of agent. Selective dosing is achieved by covering the active agent or agents by a plurality of covers (1310). Some of these covers (1310) may be walls of a package itself.
Abstract:
An oxygen-absorbing packaging material (100) is provided. The material comprises a base layer, an oxygen absorbing composition disposed on at least one side of the base layer, a film layer disposed on the oxygen absorbing layer, and printed indicia (160) to indicate information relating to a product to be contained within the packaging material. The oxygen absorbing composition comprises an oxygen absorbent contained in an emulsion. The printing appears on either or both of the base layer and film layer. The oxygen absorbing composition can be on one or both sides of the base layer, so long as it is covered by the film layer.
Abstract:
An article, such as a polymeric film, sachet, purge control pad, or label, includes a sulfur scavenger. In some embodiments, an oxygen scavenger is also included. A method includes providing an article, including a sulfur scavenger and an oxygen scavenger; and subjecting the article to a dosage of actinic radiation effective to trigger the oxygen scavenger. A method of reducing the sulfur content of a package containing a food product includes either (1) providing a film including a layer including a zinc ionomer, and a layer including an oxygen scavenger; packaging the food product in the film; and storing the package for at least 24 hours; or (2) providing the food product at a temperature of ≤ 40 °F; providing a film including a layer including a sulfur scavenger; packaging the food product in the film; and storing the package for at least 24 hours.
Abstract:
Described are multilayer packaging materials and packaged dough products comprising a dough composition in multilayer flexible package materials, the multilayer materials comprising a sealant layer, a scavenger layer, and a barrier layer.
Abstract:
Film structures, packages and methods of making the same are provided wherein the film structures have a desiccant material incorporated into a sealant layer of the film structures and further wherein the sealant layer of the film structures comprise a material for making a peelable seal when the film structures are heat sealed to other film structures. The film structure is utilized for a package to hold a product that may be sensitive to the presence of moisture. The product may preferably be pharmaceutical or nutriceutical products, although any moisturesensitive product is contemplated by the present invention.