Oxygen Barriers in Food & Beverage Packaging

A transparent high barrier film for food packaging that provides better oxygen and moisture barrier properties compared to opaque aluminum films. The film has a multilayer structure with an oxygen blocking layer sandwiched between transparent and translucent polyethylene layers. The oxygen blocking layer contains ethylene vinyl alcohol (EVOH) copolymer with 29-44 mol% ethylene content. This film allows visual inspection of packaged foods while preventing oxygen and moisture ingress. It replaces opaque aluminum films for improved transparency, durability, and food safety.

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Co-extruded multi-layer polymeric film for rigid containers like food packaging that provides improved barrier properties, toughness, and snapability compared to conventional materials. The film has stacked layers with interfaces between layers made of polypropylene and other polymers. The polypropylene layers disrupt oxygen transport and provide barrier properties. This allows using less of the expensive barrier materials like EVOH. The film structure also improves mechanical properties and recyclability. The film can be made by co-extrusion and thermoforming into containers.

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Laminated packaging material for liquid food products that provides improved barrier properties, strength, and openability compared to aluminum foil-based packaging. The material has a cellulose-based bulk layer, a barrier layer, and an innermost polyethylene film. The polyethylene film is a cast, biaxially oriented LLDPE film with specific properties. This unique laminate structure allows using thinner, more sustainable materials while maintaining integrity and barrier properties. The cellulose-based layers provide strength and recyclability, while the polyethylene film improves barrier properties and openability.

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Laminated packaging material for long-term packaging of liquid foods in aseptic cartons. The material has a cellulose-based bulk layer, a barrier layer of gas barrier material, and an inner heat-sealable layer. The inner layer is a preformed polyethylene film with specific properties. The laminated structure provides high barrier properties, puncture resistance, and sealing integrity for packaging liquids without aluminum foil. The paper-based laminate balances strength and sealing with openability for aseptic packaging of oxygen-sensitive foods.

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Sustainable, high-barrier, food-contact packaging materials and methods that replace traditional materials like HIPS and PVdC. The packaging uses a formable sheet made from a specific alloy of polymers, coated with a barrier layer containing polyethyleneimine (PEI) and polyvinyl alcohol (PVOH). The alloy layers have a composition of PET, HDPE, and a compatibilizer. The barrier coating provides oxygen and moisture barrier properties without compromising the sheet strength during forming. The coating composition and method involve intermixing PEI and PVOH with water to create a stretchable, formable gel. This gel-coated alloy sheet can be thermoformed into containers without rupturing the barrier layer. The coating composition and method avoid using HIPS and PVdC, which are banned in some jurisdictions due to environmental concerns.

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Co-extruded metallized barrier films for flexible bags that provide improved toughness, thermal retention, barrier properties, and recyclability compared to existing bags. The films have a structure with an inner sealant layer, a core barrier layer with low EVOH content, and an outer metallized sealant layer. The core barrier layer has a thin EVOH layer for oxygen and moisture barrier, while the thicker sealant layers provide toughness and sealing. The metallized outer layer allows recycling.

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Environment-friendly liquid food aseptic packaging structure that replaces the aluminum foil layer in packaging while reducing carbon emissions and costs. The packaging structure has five layers: PE1, PE2, high-barrier film, PE3, and PE4. The high-barrier film is made from a functional film formed by evaporating materials like EVOH, PVDC, polyamine, or PET through multilayer compounding. The high-barrier film is bonded to the second PE layer using an adhesive layer. The other PE layers are regular PE. The high-barrier film replaces the aluminum foil layer while providing similar oxygen-barrier properties. The packaging structure uses less aluminum, reduces carbon emissions, and has comparable food-holding properties to packaging with aluminum foil.

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Laminated packaging material for liquid food products that replaces aluminum foil barriers while maintaining oxygen barrier properties. The laminate has a barrier layer with a thin aluminum oxide coating on a substrate like polyethylene terephthalate (PET) or unbleached paper. The oxidized aluminum coating provides oxygen barrier without the thickness of aluminum foil. The oxidized aluminum coating has a non-metallic appearance and lower transmittance compared to metallic aluminum. The oxidized aluminum coating is prepared by reactive evaporation of aluminum in the presence of oxygen, resulting in small aluminum oxide particles. The barrier layer is sandwiched between other layers like paper or plastic for packaging.

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Packaging material with improved properties like heat sealability, recyclability, low foreign particle count, blocking resistance, and oxygen barrier for eco-friendly and sustainable packaging. The material has a heat seal layer, barrier layer, paper base, and surface protective layer. The heat seal layer contains acrylic or EVA resin, coating weight 1-18 g/m2. The surface protective layer contains styrene-acrylic copolymer resin. The heat seal layer Tg is lower than the surface protective layer Tg by 10°C. This prevents sticking during heat sealing while maintaining barrier properties. The barrier layer can be a vinyl alcohol or ethylene-vinyl alcohol copolymer.

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A packaging system for liquid medications that prevents oxidation and degradation of sensitive drugs. The system uses a nested design with an inner semi-permeable pouch containing the medication and an outer barrier package around it. The inner pouch allows water vapor and solvent passage, but blocks oxygen and other gases. The outer barrier prevents oxygen ingress into the inner pouch. This prevents oxidation and degradation of the medication inside the inner pouch.

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Cost-effective, recyclable, barrier-coated packaging material for long-term aseptic food storage without aluminum foil. The method involves coating a thin substrate web with reduced graphene oxide (rGO) to create an oxygen barrier. The rGO is dispersed in water and coated using a web coating machine. The rGO coating is dried and then the substrate is laminated into a packaging material. The rGO coating provides good gas barrier properties without foil. This enables recyclable, non-foil, aseptic cartons for long-life food packaging.

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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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Moisture and oxygen barrier laminate for food packaging that maintains excellent barrier properties even after retort processing or deformation like bending. The laminate has an inorganic barrier layer sandwiched between a protective layer and a transparent substrate. The key is selecting materials and processing conditions to achieve specific changes in water vapor transmission rate (WVTR) after retort or flex testing. The WVTR increase after retort should be 1.00 g/m2*day or less, and after flex testing it should be 0.70 g/m2*day or less. The protective layer and substrate can be films like nylon or unstretched polypropylene.

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Resin composition and film with improved gas barrier properties, especially oxygen barrier, under high humidity. The composition contains a hydrophilic resin like PVA or polysaccharide and a metal compound. The key is regulating the ratio of resin to metal compound mass in terms of metal content to be 90:10 to 20:80. This allows films made from this composition to have excellent oxygen barrier at high humidity without needing a separate humidity control step. The composition can be used to coat substrates or make thin films.

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Barrier-coated paper for packaging liquids that provides improved barrier properties while maintaining recyclability. The coating process involves applying a thin base layer coating to the paper, followed by a barrier coating. The base layer coating is different from the barrier coating and is applied by dispersion coating. The barrier coating is applied by vapor deposition. This sandwich structure allows using less barrier material compared to applying a thick barrier layer directly to the paper. The base layer improves adhesion and allows thinner barrier coatings. The resulting paper has better oxygen and water vapor barrier properties suitable for packaging liquids like milk.

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Oxygen and moisture barrier paper with improved barrier properties by laminating a moisture barrier film and an oxygen barrier film onto the paper substrate. The moisture barrier film prevents water penetration while the oxygen barrier film blocks oxygen. The laminated films are adhered to the paper using an adhesive layer. The lamination and drying process enhances the barrier properties of the paper without adding coatings that impede recycling.

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Recyclable paper packaging with improved moisture and oxygen barrier properties for food packaging applications. The packaging structure consists of a paper layer with a barrier layer applied to the inside surface. The barrier layer has two components: a water-based oxygen barrier and a solvent-based sealant layer. The oxygen barrier is applied first, followed by the sealant layer. This provides a paper packaging that can effectively preserve packaged foods by blocking moisture and oxygen while being recyclable compared to laminated plastic packaging.

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A paper-based packaging structure with improved barrier properties against oxygen and moisture compared to regular paper. The structure has a regular paper layer with a barrier layer applied to the inner surface. The barrier layer has two coats - a water-based oxygen barrier and a solvent-based sealant layer. This allows the paper packaging to better protect packaged products from oxygen and moisture transmission.

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Multilayer heat-shrinkable film for packaging foods and other products that provides good oxygen barrier, free shrinkage, and optical properties. The film has at least two barrier layers made of ethylene-vinyl alcohol copolymer with 27-50 mol % ethylene content. The barriers are sandwiched between outer layers and a tie layer. The tie layer adheres the barrier layers and is made of polymers like modified LLDPE, grafted LDPE, grafted PP, grafted EVA, homogeneous ethylene/alpha-olefin copolymers. The film has free shrinkage >60% at 85°C, oxygen transmission rate <20 cc/m2/day/atm at 0% RH, and haze <50 after shrinkage.

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Paper-based packaging with improved oxygen and moisture barrier properties for food packaging. The packaging uses a cellulosic fiber substrate with an inner PVOH oxygen barrier layer and an outer moisture barrier layer. The inner moisture barrier can be a polyolefin or functionalized polyolefin. The PVOH layer seals against the moisture barrier to create a hermetic package. The cellulosic substrate allows recyclability. The PVOH inner layer prevents oxygen degradation, while the moisture barrier prevents spoilage. The inner moisture barrier prevents delamination between the layers.

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