Gas Barriers for Food Package Protection

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.

Source

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,

Source

Packaging film, bags, and products with improved gas barrier properties while minimizing decreases in polyolefin content. The packaging film has a gas barrier layer, adhesive layer, and sealant layer. The gas barrier layer has a polyolefin base layer, vapor deposition layer, and a coating layer. The coating layer has a hardness less than 1.15 GPa. The adhesive layer is made by bonding a polyolefin adhesive resin to the film. The sealant layer is also polyolefin. This configuration allows the gas barrier properties to be maintained while minimizing polyolefin reduction compared to conventional multilayer films.

Source

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.

Source

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.

Source

Metallized film for packaging materials with improved gas barrier properties and adhesion when laminated with other films. The metallized film has a specific layer structure. The anchor coat layer is made of polyester resin with a viscosity average molecular weight of 500-10,000. It contains a base resin, curing agent, and additive. The base resin:curing agent ratio is 100:20-200. The total base resin:curing agent:additive ratio is 100:10-200. The additive is a compound containing glucose rings. This layer structure provides excellent gas barrier properties and adhesion when laminated with other films.

Source

Thinner gas barrier laminate for packaging that maintains high gas barrier properties in high temperature and high humidity environments. The laminate has a total thickness of 100 microns or less. It achieves this by forming a gas barrier layer using a coating liquid that undergoes a specific filtration process. This filtration reduces particle size to improve adhesion and barrier properties when the coating is dried and cured. The coating contains a polybasic acid and polyamine to form crosslinked chains. The laminate structure includes a base plastic with a metal-containing layer in contact with the gas barrier layer.

Source

A paper or paperboard packaging material that replaces aluminum foil layers in laminates for improved barrier properties against moisture, grease, and gases like oxygen. The packaging has a paper or paperboard base layer coated with a thin extruded layer of ethylene vinyl alcohol (EVOH) polymer. The EVOH layer provides superior gas barrier without the need for aluminum foil. The paper base allows recyclability without the foil. The EVOH layer thickness can be optimized to balance barrier and sealability. The paper base can have coatings or fillers to enhance barrier further.

Source

A thin, high barrier film with improved gas and moisture barrier properties compared to conventional multilayer films. The film has a unique structure with a multi-nano layer stack containing at least 10 alternating layers of different resins like nylon, maleic anhydride grafted polyolefin, and ethylene vinyl alcohol. This nano layer stack is sandwiched between tie layers of maleic anhydride grafted polyolefin. The nano layers provide gas barrier while the tie layers improve adhesion. The overall thin film has low oxygen and moisture permeability even when exposed to moisture.

Source

Laminated film for food packaging that provides both oxygen and water vapor barrier properties while being recyclable. The film uses a base layer of polyolefin or olefin copolymer, followed by a barrier primer layer, and a thin aluminum deposition layer. The primer improves adhesion between the polyolefin and aluminum. The primer is made by coating a composition containing carboxylic and hydroxyl polymers. This allows crosslinking to improve barrier properties while avoiding excessive coupling agents that weaken the film.

Source

Laminated film with improved gas and water barrier properties while maintaining recyclability. The film has a polyolefin substrate, a barrier primer coating on the substrate surfaces, and a thin aluminum layer on the primer. The primer is a crosslinked polymer formed by coating a liquid containing silane, carboxyl-containing polymers, and hydroxyl-containing polymers. Crosslinking is done by electron beam radiation. The primer thickness is less than 1000nm.

Source

Laminated packaging material with improved gas barrier properties, processability, and toughness, while being environmentally friendly and convenient. The material consists of a base film containing a polyolefin resin like polypropylene, an adhesive layer, and a heat-sealable layer. At least one of the base films is a laminated barrier film with a gas barrier layer. The barrier film has oxygen permeability 30-1500 ml/m2dMPa, and lamination reduces permeability to 60 ml/m2dMPa. The improvement rate is 10 or more. The lamination process removes volatile components quickly. The barrier film is laminated with the base film to improve gas barrier performance and maintain it after physical loads like bending. The barrier film can be a thin inorganic layer sandwiched between base films. The base films can

Source

Gas barrier laminate for packaging that provides improved gas barrier properties while maintaining adhesion between layers. The laminate has three layers: (A) a base material with an inorganic layer, (B) a resin layer with a low glass transition temperature, and (C) a layer containing water-soluble polymers, metal alkoxides, and/or their hydrolysates. The resin layer contacts the inorganic layer, and the water-soluble layer contacts the resin. This configuration enables good adhesion between the layers, even if an inorganic layer like aluminum oxide is present, while also providing gas barrier properties. The low glass transition temperature resin and water-soluble polymer layers facilitate adhesion to the inorganic layer. The metal alkoxides and hydrolysates in the water-soluble layer further enhance

Source

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.

Source

Packaging film material with high antibacterial and high barrier properties for food and pharmaceutical applications. The film has a layered structure with a heat sealing layer, aluminum foil layer, base material layer, barrier layer, and protective layer. The barrier layer is made of multiple aluminum oxide films. This improves barrier, antibacterial, and impact resistance compared to a single aluminum foil layer. The protective layer has water-based polyurethane with hydrophobic materials, nylon, and nano-antibacterials.

Source

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.

Source

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.

Source

Laminated packaging film with improved gas barrier properties. The laminate has a base material, a resin layer, an inorganic vapor deposition layer, and a gas barrier adhesive layer. The resin layer thickness is 0.1-5 μm, preventing cracks in the vapor deposition layer during processing. The adhesive has isocyanate groups that react with the vapor deposition layer to form a strong bond. This prevents gas permeation through cracks in the vapor deposition layer. The resin and adhesive layers also improve processability and sealability compared to direct vapor deposition on the base material.

Source

Packaging laminate with reduced plastic usage and improved gas barrier properties for bags and containers. The laminate has three layers: an undercoat, a gas barrier layer, and a heat seal layer. The undercoat is a water-based acrylic coating with low roughness and water absorbency to prevent delamination. The gas barrier layer has a vinyl alcohol polymer modified with an acetoacetate group. This vinyl alcohol polymer has improved gas barrier properties compared to unmodified vinyl alcohol polymers. The modified vinyl alcohol polymer layer reduces the need for additional plastic layers for gas barrier properties.

Source

Gas barrier films for packaging materials that maintain low oxygen permeability and adhesion after heat sterilization. The films have a specific thickness range for an anchor coat layer containing a (meth)acrylic resin between the base layer and the vapor-deposited layer. This stabilizes the interface and prevents delamination during sterilization. The anchor coat has a peak height of 1.5 μm or less and roughness of 5 nm or more. The films can be used in packaging materials like pouches that are heat sterilized without degrading barrier properties.

Source

Vapor-deposited gas barrier film for packaging materials that provides high gas barrier properties without the need for complex multi-layer structures. The film has a base layer made of a stretched resin containing polyolefin and PVA, followed by a vapor-deposited metal oxide layer. The metal oxide layer is in contact with the PVA layer. This film structure provides excellent gas barrier properties. The vapor-deposited metal oxide layer can be silicon oxide or aluminum oxide. The base layer prevents curling during vapor deposition. The PVA layer allows better adhesion of the metal oxide layer. This simplified barrier film replaces multi-layer structures and reduces costs compared to conventional barrier films.

Source

Gas barrier laminates, packaging films, containers, and products with improved oxygen barrier properties after abuse. The laminate has a base material, metal oxide layer, and gas barrier coating. The coating contains silicon alkoxides and water-soluble polymers, with a Si/C ratio of 0.01-0.50. This improves flexibility of the coating after abuse to maintain oxygen barrier. The metal oxide layer thickness is 5-80 nm and the coating is 50-700 nm. Anchor coat layer thickness is 30-300 nm. This optimizes thicknesses for barrier and flexibility. The laminate, films, containers, and packaged products have improved oxygen barrier after abuse compared to conventional laminates.

Source

Laminate for packaging materials with improved gas barrier properties and reduced barrier performance deterioration during processing. The laminate has a barrier film with an inorganic oxide layer on a stretched polypropylene substrate, a sealant layer of unstretched polypropylene, and an adhesive layer with a glass transition temperature (Tg) of 20°C or higher. This thermally resistant adhesive prevents the softening and deformation of the inorganic oxide layer during processing at temperatures of 40-50°C. An optional overcoat layer on the inorganic oxide layer can also have a Tg of 20°C or higher. The laminate allows using monomaterials like polypropylene for the base film, sealant, and adhesive, which is more recyclable than multilayer films, while maintaining barrier performance

Source

Gas barrier film for packaging applications like food, pharmaceuticals, and electronics that has improved gas barrier properties compared to existing films. The film has a base layer made of polyethylene and a first gas barrier layer formed on one side. The key feature is the surface roughness of the barrier layer. It has a spatial frequency of 10 μm-1 to 1 μm-1 and a maximum power spectral density of 8 nm in the range below 3 μm-1. This roughness enhances gas barrier performance compared to smooth barrier layers.

Source

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.

Source

Gas barrier laminates, packaging materials, packages, and packaged articles that provide improved gas barrier properties and content resistance during wet heat sterilization. The laminates have a structure where a carboxylic acid polymer layer is coated onto an inorganic deposition layer. A layer containing dispersed polyvalent metal particles is coated on top. The carboxylic acid polymer layer has a specific peak height ratio in its IR spectrum. During wet heat sterilization, the metal particles react with the carboxylic acid groups to further improve gas barrier properties. Adding a silicon compound further enhances gas barrier performance. The laminates, packaging materials, packages, and packaged articles made using this structure have improved gas barrier properties and content stability during wet heat sterilization compared to traditional laminates.

Source

Packaging material and containers that can be stretch formed and still have excellent gas barrier properties. The packaging material has a barrier layer containing a reaction product of a carboxyl group-containing resin and a polyvalent metal compound. This cross-linked barrier layer prevents oxygen and water vapor permeation. Stretching the material to make containers doesn't significantly reduce the barrier properties due to the strong bonding. The container volume increase ratio after stretching is 1.5-5 times the initial material volume.

Source

Gas barrier laminate films for food packaging that have reinforced heat resistance for boiling and retort applications. The laminate is made by coating a transparent polyamide film with a thin deposition layer containing inorganic compounds like aluminum oxide. This is followed by an organic-inorganic coating layer made with an acrylic polymer containing methyl methacrylate and silica nanoparticles. This layer improves gas barrier properties while maintaining heat resistance. The laminate is further coated with adhesives and sealed to create a composite with reinforced heat resistance and gas barrier properties. The methyl methacrylate-based acrylic polymer provides gas barrier properties and water resistance.

Source

Gas barrier film for packaging applications like food, drugs, and electronics that reduces environmental impact by using polypropylene as the base material instead of PET. The film has a pretreatment layer, gas barrier layer, and coating layer. The pretreatment layer is formed by roughening the base film surface to improve adhesion. The gas barrier layer is formed by depositing a thin film like aluminum oxide. The coating layer protects the barrier layer. The film's gas barrier performance is enhanced by the pretreatment to create surface roughness. The pretreatment step is crucial for adhesion and barrier properties. The roughness power spectral density values at 1 nm, 10 nm, and 100 nm wavelengths are 0.002 nm, 0.020 nm, and 0.300 n

Source

Gas barrier laminate for packaging materials with improved gas barrier properties that are stable and high regardless of humidity conditions. The laminate has a base material, a thin resin layer, an inorganic thin-film deposition layer, and an inorganic vapor deposition layer. The resin layer has a thickness of 0.1-5 microns. This laminate configuration provides consistent gas barrier properties even when the humidity fluctuates or cracks occur in the thin-film deposition layers.

Source

Gas barrier laminate with excellent gas barrier properties and retort resistance for packaging applications. The laminate has two layers formed on at least one surface of the base material: a metal alkoxide layer and a metal compound layer. The metal alkoxide layer contains metal alkoxides like silanes. The metal compound layer contains metal compounds like oxides. The layers react to form a stronger barrier when laminated together. This prevents gas and moisture permeation through the laminate, even after sterilization treatments.

Source

Flexible multilayer packaging film with ultra-high barrier properties against oxygen and moisture, suitable for applications like food packaging. The film has barrier properties that maintain after flexing and folding. It avoids using aluminum or thick aluminum layers that degrade under flexing. Instead, it uses thin oxide coatings and EVOH layers. The film composition and production method aim to provide high barrier properties without compromising flexibility.

Source

Gas barrier laminate and packaging material for single-material recyclability. The laminate has a polypropylene base layer, an interposed polyvinyl alcohol layer, and a metal oxide barrier layer. The polyvinyl alcohol layer improves gas barrier properties even with a rough polypropylene base. The packaging material uses this laminate with a polypropylene sealant layer to create a single-material packaging that can be recycled as a polypropylene product. The laminate and sealant composition enables achieving good gas barrier performance while avoiding veining issues that can affect barrier performance when using polypropylene alone.

Source

A transparent barrier film with oxygen barrier and high water vapor permeability for packaging fruits and vegetables to maintain freshness. The film has a thin aluminum oxide layer deposited on one side of a plastic film. The aluminum oxide layer has thickness of 5-10 nm and an oxygen/aluminum mass ratio of 2.15-2.30. The film can be laminated with a heat seal layer having a water contact angle of 30° or less for sealing. The film's oxygen barrier is less than 5 cc/day•m2 and water vapor barrier is 6 g/m2•day, allowing gas exchange while preventing spoilage.

Source

Packaging material and packaging bodies that can accommodate highly permeable contents like volatile liquids without compromising laminate strength or barrier properties. The packaging material has a base layer made of a polymer, a gas barrier vapor deposition layer, a gas barrier coating layer, an adhesive layer, and a sealant layer. The coating layer contains a compound like metal alkoxide, its hydrolyzed form, or a polymerized version, along with a hydroxy group-containing polymer. This coating adheres to the gas barrier layer and prevents permeants from penetrating and degrading the barrier. The sealant layer seals the contents. The coating and adhesive layers sandwich the barrier layer between them, preventing permeant ingress.

Source

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

Source

Enhanced PVOH-based barrier layer for packaging applications that provides effective gas barrier properties in high humidity conditions. The barrier layer contains a specific proportion of an interpolymer complex forming agent (IPCFA) that forms hydrogen bonds with PVOH. The IPCFA is a water-soluble polymer like polyacrylamide or poly(methyl vinyl ether-alt-maleic acid) that has functional groups to bind with PVOH. The IPCFA:PVOH ratio is 0.5-7.0% (w/w) in the barrier layer. This composition allows PVOH-based packaging with low oxygen permeability below 14 ml/m2/day/atm even at 80% RH.

Source

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.

Source

A gas barrier laminate packaging material that prevents degradation of packaged products by having high oxygen and water vapor barrier properties even under humid conditions. The laminate has two layers. Layer A is formed by coating ethyl cellulose and an inorganic compound in a non-aqueous solvent onto a substrate. Layer B contains a polyvalent carboxylic acid monomer. The layers are laminated together. This combination provides excellent gas barrier properties that don't degrade under humidity compared to conventional oxygen barrier coatings.

Source

Durable barrier film for packaging liquids using diamond-like carbon (DLC) vapor deposited on a polymer substrate. The DLC coating provides gas barrier properties for liquid food packaging. The coating has a gradient of decreasing oxygen ion content toward the surface, followed by an increase. This gradient has a specific slope and minimum value. The coating thickness is at least 20 nm. The film can be used in laminated packaging materials for long-term aseptic food storage, replacing aluminum foil without sacrificing barrier properties.

Source

Gas barrier films, laminated films, and packaging that have high oxygen and water vapor barrier properties from the initial stage of production, and the barrier properties are unlikely to deteriorate even after wet heat treatment and bending. The films use a unique composition with an epoxy resin layer adjacent to a polycarboxylic acid layer. The epoxy resin layer has four or more epoxy groups and a thickness of 120-240 nm. This layer structure provides high initial barrier properties. The laminated films have this gas barrier layer sandwiched between a base material and a sealant layer. The films have oxygen permeability of 1 cc/m2-day at 23°C/60%RH, much lower than industry standards, and the barrier does not degrade after heat treatment and bending.

Source

Laminated packaging material with improved gas barrier properties after bending. The laminate has a specific structure with layers that provide gas barrier and crack resistance. The layers are a crack resistance imparting adhesive layer, an inorganic thin-film deposition layer, and an inorganic thin-film deposition layer support layer. The adhesive layer prevents cracking of the inorganic thin-film layer when bent. This allows thinner, more flexible packaging with better gas barrier properties compared to thicker metal foils.

Source

Laminated packaging material for long-term aseptic liquid food storage that replaces aluminum foil in cartons. The material uses a durable diamond-like carbon (DLC) barrier coating on a polymer film substrate. The DLC coating provides gas and moisture barrier properties. The coating has a gradient of decreasing oxygen ion content towards the surface. This gradient with minimum value at 50% coating depth allows good barrier properties. The coating thickness is 20-30nm. The DLC barrier film is laminated between inner and outer sealing layers to make the carton. It replaces aluminum foil for oxygen barrier while enabling aseptic packaging of liquids like milk without aluminum.

Source

Oxygen barrier film for food packaging with improved adhesion between the base layer and the oxygen barrier coating. The barrier coating is made of a composite of a natural product hydrogel and a silane coupling agent. The hydrogel can be a protein or carbohydrate like whey, soy, casein, pullulan, etc. The silane coupling agent helps anchor the hydrogel to the base film. The weight ratio of hydrogel solids to silane is 10:1 to 1:10. The composite coating is applied to the base layer to create an oxygen barrier film with enhanced adhesion compared to just the hydrogel on the base.

Source

A laminate structure and packaging material with improved gas barrier properties, particularly oxygen and water vapor barrier, using a specific adhesive layer composition. The laminate has a base material of biaxially stretched polypropylene, an alumina layer on it, and an adhesive layer on the alumina. The adhesive layer contains a polyester polyol and an isocyanate resin. This adhesive composition allows high gas barrier properties when used with an aluminum oxide layer on the base material, even when an oxygen-sensitive polypropylene film like OPP is used. The adhesive enables better barrier properties compared to conventional adhesives, and maintains them after bending tests. The adhesive composition can be applied solvent-free.

Source

A gas barrier laminate for packaging materials that provides better oxygen barrier properties than conventional laminates. The laminate has multiple layers including a base of biaxially stretched polypropylene, an aluminum oxide layer, a gas barrier coating layer, and an adhesive layer. The gas barrier coating layer contains a resin with carboxyl groups, a divalent metal compound, and alcohol in specific weight percentages. This composition allows the coating to form an ionic bond with the carboxyl groups during drying, improving gas barrier properties.

Source

Gas barrier film with improved oxygen and water vapor barrier properties compared to existing films like PVDC and EVOH. The film has a composite structure with an inner layer of a hydroxyl group-containing polymer like polyvinyl alcohol (PVOH) and an outer layer of an aqueous polyurethane resin. The inner layer provides initial barrier against oxygen and water vapor, while the outer layer improves mechanical properties and prevents delamination during stretching. The film composition and layer ratios are optimized to balance barrier properties and coating uniformity.

Source

Laminate packaging material that can be treated with hot water like boil sterilization and retort sterilization and have excellent oxygen barrier properties. The laminate has a base film, gas barrier precursor layer, adhesive layer, and thermoplastic resin layer. The gas barrier precursor layer contains a polycarboxylic acid-based polymer that forms ionic crosslinks with metal ions. This layer is sandwiched between an anchor coat layer and a modified polymer layer. The anchor coat and modified polymer layers prevent delamination during heat sealing. The modified polymer layer also improves adhesion. Boiling the laminate improves gas barrier properties and strength compared to vapor deposited layers.

Source

Barrier material for packaging applications that provides gas and moisture barrier properties without using aluminum. The barrier contains a layer with at least 50% zinc ionomer, a polyethylene layer, and a layer forming a gas barrier. The zinc ionomer layer provides moisture resistance, while the polyethylene layer provides heat sealability. The gas barrier layer prevents oxygen and gas transmission. The zinc ionomer and polyethylene layers can be extruded or laminated together, and the gas barrier layer can be a film or multilayer structure. The barrier material is suitable for products like cosmetics, foods, and liquids that require gas and moisture protection. It provides durability, strength, chemical resistance, and printing compatibility without aluminum.

Source

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.

Source