Oxygen Scavengers in Food Package Preservation

Oxygen scavenger powder for food packaging that reduces heat generation when the package is opened. The powder contains iron, a metal halide, and a barely water-soluble alkaline agent. The alkaline agent has low water solubility and high pH. It suppresses iron oxidation and heat generation by forming a high pH coating on the iron as moisture is absorbed. This slows iron corrosion when the package is opened.

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Oxygen absorber for food packaging that reduces odor while maintaining high oxygen absorption. The absorber contains an unsaturated oligomer, oxygen absorption promoter, carrier, inorganic particles, and activated carbon. The key is adsorbing less than 6.5% of the oligomer onto the inorganic particles. This prevents excessive oligomer migration and off-gassing during oxygen absorption. The inorganic particles absorb volatile compounds before the oligomer reacts with oxygen. The activated carbon further reduces odor.

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Polymeric preform and container that can have a high percentage of recycled material while maintaining oxygen barrier properties. The container has an active oxygen scavenger layer with up to 25% recycled polymer to extend shelf life. This layer contains an oxygen scavenger, catalyst, and recycled polymer. The rest of the container has at least 25% recycled polymer. This allows using more recycled material in the container while still providing oxygen barrier properties.

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Deoxidizer package for food preservation that allows monitoring of oxygen levels inside the package to ensure food quality. The package has a deoxidizer bag containing an oxygen absorber, a drying bag with desiccant, and a detection bag with oxygen concentration test paper. Breathable papers allow air exchange between the bags. This allows the deoxidizer to remove oxygen, the desiccant to dry moisture, and the test paper to monitor oxygen levels in the food package.

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Boil/retort compatible oxygen absorbing packaging material for foods that prevents oxygen deterioration during processing and storage. The material has a specific layered structure. It consists of base, ink, metal foil, oxygen-absorbing adhesive, antioxidant shielding resin, and sealant layers. The oxygen absorbing adhesive contains an oxygen absorber compound with unsaturated 5-membered rings. The antioxidant shielding resin and sealant layers prevent oxygen ingress and antioxidant migration. This balance of oxygen absorption, barrier properties, and interlayer adhesion allows the packaging to absorb oxygen during processing while preventing odor transfer.

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Oxygen-absorbing packaging material for microwaveable containers that generates less odor, absorbs oxygen inside containers to prevent food spoilage, and is microwave-safe. The material has layers in order: base, printing ink, shielding resin, oxygen-absorbing adhesive, antioxidant shielding resin, and sealant. The oxygen-absorbing adhesive contains unsaturated 5-membered rings with carbon-carbon double bonds and electron-donating groups. The shielding resin prevents ink ink components from affecting the oxygen absorber. The antioxidant-shielding resin protects the oxygen absorber from antioxidants in the sealant.

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Maintaining freshness of fruits and vegetables by packaging them with atmosphere adjusters that absorb oxygen, carbon dioxide, and release moisture to create optimal conditions inside the package. The adjusters are stored alongside the fruits and vegetables in breathable packaging. This allows gas balance adjustment without using specialized equipment. The adjusters absorb oxygen and CO2, generate moisture, and prevent excessive respiration. The breathable packaging allows some ventilation but prevents large gas exchange. This prevents spoilage by adjusting the interior atmosphere to optimal levels for the specific fruits and vegetables.

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Packaging system for extending the shelf-life of retail-ready meat cuts by reducing oxygen concentration to zero within a few hours after packing. The system involves using oxygen scavengers with iron-based chemistry placed inside meat trays or bags containing nitrogen instead of air. This rapidly removes oxygen to prevent discoloration and spoilage, allowing longer shelf-life of centrally prepared meat cuts. The scavengers absorb oxygen rapidly due to their chemistry and placement inside the packages. By reducing oxygen to zero, it restores the meat's ability to prevent browning and extends shelf-life compared to partial oxygen depletion.

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Oxygen absorbing packaging material with improved light blocking and odor suppressing properties while maintaining oxygen absorption. The oxygen absorbing material contains a specific ratio of iron powder, titanium oxide, calcium oxide, and polyolefin resin. This composition allows the oxygen absorbing properties of iron powder to be combined with improved light blocking and odor suppression from the other components. The oxygen absorbing material can be used as a film or layer in packaging applications like food containers or cover materials to provide extended shelf life.

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Packaging system for extending the shelf-life of retail-ready meat cuts by reducing oxygen levels to prevent discoloration. The system involves using oxygen scavengers inside the meat trays and master bags containing multiple trays. The scavengers absorb oxygen rapidly to achieve zero oxygen levels in a short time after sealing. The scavengers based on iron chemistry can do this due to their fast oxygen absorption rates. Placing them inside trays and bags optimizes oxygen removal. The zero oxygen environment prevents metmyoglobin formation and maintains meat color.

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Blow molded containers for food packaging that reduce costs and waste compared to conventional containers. The containers are made by injection molding a first material for the top and a second material with an oxygen scavenger for the bottom. The bottom has inner, outer, and intermediate portions. The inner and outer portions are the first material, the intermediate portion contains the oxygen scavbler. This allows targeted barrier layers without dispersing them throughout the container. The intermediate portion thickness is between the inner and outer. The bottom is blow molded into the container without trimming. This minimizes scrap compared to trimming the entire preform.

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Oxygen scavenger compositions for packaging applications that have improved oxygen scavenging properties. The compositions contain a base polymer, a butadiene polymer, and titanium dioxide. The butadiene polymer scavenges oxygen when catalyzed by the titanium dioxide. The compositions can be used to make packaging films, bags, containers, etc. that absorb oxygen and prevent oxidation of the packaged items. The base polymer can be ethyl cellulose, the butadiene polymer is preferably low molecular weight unfunctionalized polybutadiene, and the titanium dioxide is added in an amount to catalyze the butadiene oxidation. The compositions can be prepared by solution mixing, melt extrusion, or electrospinning techniques.

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Using tea as an oxygen scavenger in packaging to extend the shelf life and improve quality of oxygen sensitive products like food, beverages, pharmaceuticals, and cosmetics. The tea is incorporated into packaging materials or used as sachets to scavenge oxygen and prevent deterioration of packaged products due to oxygen exposure. The tea provides an environmentally friendly, biodegradable, and consumer-preferred oxygen scavenging alternative to synthetic additives. The tea's increased oxygen uptake rate in packaging allows more effective scavenging compared to other natural scavengers.

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Food packaging with absorbent pads that improve the quality of packaged foods by controlling the internal atmosphere and inhibiting spoilage. The pads have a multi-layer architecture with fluff made from wood pulp for liquid absorption and a tissue laminate layer containing chemical agents like CO2 generators. The tissue layer provides a substrate for the fluff during manufacturing and allows controlled distribution of chemicals. The pads also have options like oxygen scavengers and ethylene inhibitors. This design allows tailored chemical reactions to extend food shelf life by controlling factors like CO2 levels, oxygen, and ethylene.

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Oxygen-absorbing laminate for packaging materials that generates little odor, has excellent oxygen barrier properties, oxygen absorption, interlayer adhesion, and heat-sealing. The laminate structure includes printing ink, ink shield, inorganic barrier, oxygen absorber layer, and sealant. The oxygen absorber compound contains unsaturated 5-membered rings with carbon-carbon double bonds and electron-donating groups. It absorbs oxygen to prevent deterioration of packaged contents. The laminate suppresses gas permeation and absorbs oxygen inside the package to prevent oxidation.

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Oxygen scavenging compounds for packaging materials that contain a heteroatom-substituted aryl group. The aryl group can have unsubstituted methylene positions. These compounds react with oxygen in the presence of transition metals to mitigate oxidative damage to packaged contents. The compounds can be incorporated into polymers or used as additives in packaging compositions to extend shelf life of oxygen-sensitive materials.

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Substantially transparent oxygen scavenging compositions for packaging of oxygen-sensitive materials. The compositions contain a base polymer, an oxygen-scavenging compound with a specific chemical structure, and a transition metal. The compounds scavenge oxygen from the packaging environment to extend shelf life of sensitive products like food, beverages, and pharmaceuticals. The compositions are substantially transparent due to improved dispersion of the scavenger compound in the polymer matrix.

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Oxygen scavenger composition for food packaging to prevent oxidation and hydrogen generation. The composition contains a mixed granule of water retention agent, swelling agent, metal halide, water, iron, and alkaline substance. It is prepared by mixing all ingredients instead of layering them. This disperses the iron throughout the granule and provides a uniform oxygen absorption surface. The alkaline substance helps suppress hydrogen generation. The composition can absorb oxygen without container deformation.

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Food container with removable gas absorbing elements to preserve freshness of food items. The container has a body with a cavity to hold food and a lid. Removable gas absorbing elements like membranes with zeolite, activated carbon, or potassium permanganated silica are placed inside the container or attached to the lid. These elements absorb spoiling gases like ethylene, moisture, and odor to keep the food fresher for longer. The elements can be easily removed and regenerated by heating to restore their gas absorption capacity.

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A photo-oxygen barrier for packaging materials that protects light and oxygen sensitive products like food, beverages, medications, and cosmetics. The barrier is a composite material containing 1-65% of a light-blocking composition, 1-30% of an active oxygen absorber, and 5-98% of a base material. The light-blocking composition can contain titanium dioxide, aluminum powder, and carbon black. The active oxygen absorber contains cobalt. The barrier can be made by melt extrusion or mixing the components in a base material.

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