A modified atmosphere packaging method creates a modified atmosphere in a package including an inner package and an outer package. The inner package is composed at least partially of a polymeric material substantially permeable to oxygen, while the outer package is composed of a polymeric material substantially impermeable to oxygen. After a food product such as raw meat is placed within the inner package, the inner package is flushed with a desired mixture of gases to substantially remove oxygen from the inner package. The flushed inner package is then sealed and inserted into the outer package without sealing the outer package. Next, the outer package is flushed with the desired mixture of gases to substantially remove oxygen from the outer package. After flushing the outer package, the outer package is sealed. An oxygen scavenger is provided in the package to substantially absorb any residual oxygen within the package. The oxygen scavenger is activated with an oxygen uptake accelerator to increase the rate at which the residual oxygen is absorbed.
This is a continuation of application Ser. No. 08/763,719 filed Dec. 13, 1996, now U.S. Pat. No. 5,811,142, which is a continuation-in-part of U.S. patent application Ser. No. 08/627,137 filed Apr. 3, 1996 now U.S. Pat. No. 5,698,250.
A modified atmosphere package for storing oxygen sensitive goods which contains a a gas permeable tray for holding the oxygen sensitive goods, a gas permeable film positioned over and adjacent to the tray forming a wrapped tray, a barrier bag with an inside surface and an outside surface within which the wrapped tray is disposed, and a pressure relief valve located on the outside surface of the barrier bag. The tray contains foam material, at least about 20 volume percent of which is open cell foam with an average cell diameter of from about 0.001 to about 0.020 inches. A film of gas permeable material is disposed over and contiguous with the bottom wall of the gas permeable tray. The barrier bag has an oxygen permeability of less than 5 cubic centimeters per 100 square inches per 24 hours.
A packaging system for preserving perishable moisture-containing items comprising a shrinkable barrier bag comprising at least one compartment, and a one-way valve disposed in the wall of the barrier bag, sealing means for closing the barrier bag, a carbon dioxide gas source gas disposed within the barrier bag, a clear transparent oxygen-permeable container disposed within the barrier bag, for containment of perishable moisture containing items, and a water-containing pad disposed within the barrier bag for providing humidity within the barrier bag.
A modified atmosphere package for storing oxygen sensitive goods which contains a a gas permeable tray for holding the oxygen sensitive goods, a gas permeable film positioned over and adjacent to the tray forming a wrapped tray, a barrier bag with an inside surface and an outside surface within which the wrapped tray is disposed, an oxygen absorber disposed within the barrier bag, and a pressure relief valve located on the outside surface of the barrier bag. The tray contains foam material, at least about 20 volume percent of which is open cell foam with an average cell diameter of from about 0.001 to about 0.020 inches. A film of gas permeable material is disposed over and contiguous with the bottom wall of the gas permeable tray. The barrier bag has an oxygen permeability of less than 10 cubic centimeters per 100 square inches per 24 hours.
A method of preparing a uniformly tender meat product having an extended shelf life comprises the steps of selecting one or more meat ingredients wherein the muscle weight is comprised of whole protein tissue fibers, such as beef or pork, and mixing an acidulent with the meat to form a pretenderized meat product. Subsequently, the pre-tenderized meat product is mixed with an enzymatic tenderizer and cooked. The finished product is typically packaged in an oxygen-impermeable film, which also contains a microbe-inhibiting atmosphere and an oxygen-moisture scavenging agent.
A modified atmosphere package for storing oxygen sensitive goods which contains a gas permeable tray for holding the oxygen-sensitive goods and a gas permeable film wrapped over the tray. The tray is made from foam material; at least about 20 volume percent of said foam material is open cell foam. A hinged flap is connected to a wall of the tray and contains a receptacle in which a source of carbon dioxide (such as dry ice) may be disposed.
