Gas Barrier Solutions for Improved Food Preservation

Laminated packaging material for pouch containers of liquid, semi-liquid, and viscous food products that provides improved barrier properties and package integrity compared to conventional carton packaging. The material has a cellulose-based bulk layer, a barrier layer between the bulk and inner layer, and an inner polyethylene film. The polyethylene film has specific properties like thickness, composition, and orientation to balance strength and openability. The barrier layer can be a metal foil or coated paper. The inner film improves barrier and sealing while reducing foil use. The layered structure provides good barrier, strength, and sealing properties for pouch packaging of sensitive foods.

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A laminated packaging material for liquid, semi-liquid, and adhesive food pouch packaging that provides improved barrier properties, sealability, and puncture resistance compared to conventional laminated packages. The material has a bulk layer of cellulose-based material, a barrier layer with gas barrier coating, and an innermost heat-sealable layer. The innermost layer is a pre-formed polyethylene film with specific properties. This composite structure allows aseptic packaging of liquids with reduced carbon footprint and improved performance compared to aluminum foil alternatives. The paper bulk layer is thinner than usual, the barrier layer is a coated paper, and the innermost layer is a pre-formed film. The film is biaxially oriented LLDPE with 60-100% LLDPE content. This provides a balance of barrier, sealability,

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Packaged sliced rare, medium rare, and medium cooked roast beef that maintains its pink color for longer shelf life without using artificial preservatives like BHA or BHT. The sliced cooked roast beef is sealed in flexible, gas-impermeable packages flushed with a mixture of carbon dioxide, nitrogen, and a small amount of carbon monoxide. The carbon monoxide slows oxidation and prevents discoloration. The packages are formed without trays to reduce weight and cost. This allows long-distance transportation without refrigeration, benefiting remote locations.

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Multilayer polyester bottles like PET bottles for carbonated beverages that have improved gas barrier properties without degrading the PET, impacting stretch ratio, or negatively affecting clarity. The bottles have a barrier layer sandwiched between two PET layers. The barrier layer is made of a furandicarboxylate-based polyester like poly(ethylene furan-2,5-dicarboxylate) (PEF) with lower gas permeability than regular PET. The furandicarboxylate polymer improves barrier without plasticization issues compared to additives. The multilayer design prevents delamination and maintains mechanical properties.

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A controlled environment system for maintaining ultra-low oxygen concentrations inside shipping containers to prevent spoilage of perishable food products. The system uses stored compressed gases like nitrogen, carbon dioxide, and inert gases to positively pressurize the container and replace the oxygen. Sensors monitor the gas concentrations, temperature, and usage. Controllers release the gases at a variable rate to maintain consistent ultra-low oxygen levels. The sealed container's limited permeability further minimizes oxygen ingress.

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Packaging for perishable foods that extends shelf life without using halogen-containing barriers or external coatings. The packaging uses a unique coated paper material with three layers. The first layer has hydrophobic polymers like waxes to prevent fat and grease penetration. The second layer has hydrophilic polymers to prevent fat transfer. The third layer has hydrophobic polymers again to prevent fat back-transfer. This sandwich structure provides a gas-tight, fat-barrier coated paper that can be used for packaging moist, fatty foods like meat and cheese without needing external coatings or aluminum barriers.

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Stand-up pouch for retort packaging that recovers gas barrier properties after sterilization and maintains high barrier performance. The pouch has a base film with layers on one side: polyamide, ethylene-vinyl alcohol copolymer (EVOH), and heat-sealing resin. The polyamide and EVOH layers adjoin. This configuration allows better gas barrier recovery after retort processing compared to separating those layers.

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Multilayer structure for packaging applications like standup pouches that provides improved gas barrier properties after retort processing and better puncture resistance. The structure has an ethylene-vinyl alcohol copolymer (EVOH) barrier layer sandwiched between an intermediate layer containing polypropylene and a hydrocarbon resin, and a heat seal resin layer. The intermediate layer with the specific resin composition improves the barrier properties of the EVOH layer after retorting while avoiding excessive thickening. The hydrocarbon resin in the intermediate layer also improves puncture resistance.

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Multilayer packaging material with improved gas barrier properties and retort resistance, suitable for food packaging. The material has three layers: a base, an intermediate layer, and a barrier layer. The barrier layer contains aluminum-containing oxide. The intermediate layer enhances adhesion between the base and barrier layers. This allows maintaining gas barrier and preventing delamination after bending and retorting. The intermediate layer can also have a reactive adhesive.

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Enhanced barrier layer for packaging materials like food, beverage and pharmaceutical packages that provides effective gas barrier properties at high humidity levels. The barrier layer is made by coating a substrate like paper with a polyvinyl alcohol (PVOH) solution containing a small amount of an interpolymer complex forming agent (IPCFA). The IPCFA forms hydrogen bonds with the PVOH to enhance barrier properties. The IPCFA is a water-soluble polymer with functional groups that bond to PVOH's hydroxyl groups. The IPCFA proportion in the coating is 0.5-7.0% (w/w) PVOH. This provides a barrier layer with low oxygen permeability below 14 ml/m2/day/atm when measured at 80% RH. The barrier layer can also optionally contain nanofillers

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Tubular container with improved properties for storing and dispensing contents while preventing absorption and maintaining gas barrier. The container has a separate outlet unit made of non-absorbing material, and a body part made of a laminated film with an inner non-absorbing layer, an intermediate gas barrier layer, and an outer layer. The outlet unit surfaces that contact the contents are also made of non-absorbing material. This prevents absorption of contents into the container while maintaining gas barrier. The body part can be transparent to allow visual inspection of the contents.

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A sealing film for containers that allows controlled gas venting to prevent spoilage of fermented foods while maintaining airtightness. The film has through-holes and stacked layers with bonded surfaces. It also has features like aluminum layers, sandwich structures, and moving presses to form the sealing film. The film is used in containers like beverage bottles to keep fermented drinks fresh by allowing gas release while preventing contamination.

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Laminate structure for packaging materials with improved gas barrier properties and reduced bubble formation. The laminate has multiple gas barrier layers without needing surface protective layers. This prevents carbon dioxide generated during curing from trapping bubbles between layers. The laminate avoids defects like visible bubbles and delamination. It can be used to make packaging bags, bags with plugs, and hydrogenous water containers with reliable gas barrier performance.

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Thermoplastic containers with low gas permeability and high temperature resistance for storing air-sensitive products like food. The containers are made by blending two incompatible polymers: a high-melting copolyester and an oxygen scavenging polyester. The blended resin has low gas transmission and can be processed into transparent, heat-resistant containers. The containers prevent oxygen ingress to preserve stored products. The oxygen scavenging polymer prevents oxidation by consuming oxygen. The copolyester provides rigidity and heat resistance. The blending compatibility allows manufacturing the containers by extrusion or molding.

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A packaging structure for food products, particularly tomato-based liquids, that provides improved barrier properties against oxygen and moisture while maintaining rigidity. The packaging is a bilaminated film structure with an outer polyester layer and an inner coextruded layer containing EVOH resin. The EVOH layer is sandwiched between high density polyethylene (HDPE) layers. This configuration provides a total oxygen transmission rate (OTR) below 1 cc/day at high humidity, meeting tomato sauce packaging standards. The HDPE layers prevent moisture absorption into the EVOH and accelerated oxidation. The robustness also prevents collapsing under hot fill processing.

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Food packaging that provides improved oxygen and moisture barrier properties without the use of EVOH or metal clips. The packaging uses a multilayer film support member with a starch layer as the inner barrier. The starch layer contains modified starch to improve moisture resistance. The starch layer thickness is at least 20% of the total film thickness. An adhesive layer may be used between the starch and outer layers. This allows sealing the food in a lidding film. The starch barrier provides oxygen and moisture protection without needing EVOH or metal clips. The modified starch improves moisture resistance compared to regular starch.

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Food storage container with improved oxygen barrier performance for preserving food by using a film that forms overlapping sections when inserted into the container. The container has a divided film with a bottom section attached to the bottom and a lateral section attached to the sides. The bottom and lateral sections overlap at the corners to provide a tight seal. This allows the film to be inserted separately instead of being molded in, reducing complexity and thickness compared to methods like in-molding or inserting preformed sheets. The overlapping sections ensure a sealed container interior when the film is inserted.

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A food storage container with high oxygen barrier properties for long-term sterilized food storage. The container has a unique multilayer film structure that improves on existing complex film shapes. The container has a body with a lower surface and side walls to form an inner space. A lower film is attached to the lower surface. A first overlapping portion is where the lower film overlaps the side film. A second overlapping portion is where the end of the side film overlaps itself. This structure allows the oxygen barrier film layers to seamlessly connect at the container edges without gaps, preventing oxygen ingress.

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A packaging method for long-term oxygen barrier in multilayer plastic containers filled with liquid or pasty foods. The method involves sealing the container in an outer bag with high oxygen barrier properties. The multilayer container itself has an intermediate layer with an oxygen-absorbing resin blended into the inner and outer barrier layers. The intervening layer between the barrier layers is positioned 10-40% from the outer wall. This configuration keeps oxygen permeation into the container substantially zero for long periods when hermetically packaged with the outer bag.

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A multilayer film for packaging food and feed that balances gas barrier properties with moisture control to prevent mold growth and softening without perforations. The film has a gas barrier layer to keep protective gases in and oxygen out. A sealing layer allows moisture vapor transfer. The sealing layer is made from materials like edible acids, fruit acids, cellulose derivatives, or lacquered cell glass. These materials have good sealing properties but also allow some moisture transfer to prevent food drying out. The film structure enables effective gas barrier, moisture control, and sealing without perforations or preservatives.

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