Research on Biodegradable EVOH Films

Compostable multilayer film for making lids of capsules for beverage pods that can be easily broken during extraction without adhesives. The film has two layers, an outer one and an inner one. The inner layer is a compostable biopolymer loaded with embrittlement additives. It provides adhesion to the outer layer and the cup body, sealing the capsule, while also allowing the capsule to easily break open during extraction. The inner layer also filters powder from the capsule. The compostable, adhesive-free multilayer film enables compostable capsules for brewing beverages like coffee that can be easily broken during extraction without adhesives.

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A recyclable packaging solution that combines barrier properties with recyclability through a novel laminated film structure. The film comprises a base material of polyethylene terephthalate (PET) on one side and a coextruded sealant containing ethylene-vinyl alcohol (EVOH) on the other. The sealant layer, with its 6 μm EVOH barrier, provides enhanced barrier performance while maintaining recyclability through its thin thickness. The PET base material enables recyclability through conventional recycling processes, while the EVOH sealant layer enhances barrier properties.

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A film, laminated film, and packaging bag with improved recyclability and barrier properties. The film has two layers, an inner layer made of polyethylene (PE) and an outer layer made of ethylene-vinyl alcohol copolymer (EVOH). The layers are coextruded and then stretched in the same direction. This allows the film to be recycled as a single material while maintaining barrier properties. The EVOH layer thickness is 6 μm or less. The film can be used in laminated structures or packaging bags.

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Compostable capsule for beverage machines that opens reliably with compostable materials while maintaining quality and consistency. The capsule has a delivery wall with separate retaining and filter layers that open sequentially under pressure. The retaining layer opens first to allow fluid injection, followed by the filter layer to prevent particles in the beverage. Both layers are made of biodegradable materials. The sequential opening design allows efficient fluid extraction through the filter without puncturing it. The compostable capsule provides a sustainable alternative to aluminum capsules with improved extraction and compostability.

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A composite biodegradable plastic material for food packaging that combines starch, degradable resins, stabilizers, and dispersants to provide improved mechanical strength and degradability compared to starch-based plastics. The starch is modified with enzymes to shorten the chain length and increase branching for better crystallization and mechanical properties. Graphitic carbon nitride nanoparticles are added as a reinforcing agent and antibacterial agent. The composite material is prepared by extrusion molding.

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Preparation of a completely bio-based material through a biocatalytic process. The method involves enzymatically converting renewable biomass into bio-based monomers, followed by polymerization of these monomers to form a fully bio-based polymer material. The process leverages biocatalysts to transform biomass-derived feedstocks into the polymer building blocks, eliminating the need for petroleum-based feedstocks. The resulting material exhibits the unique properties of biodegradability, renewable sourcing, and reduced environmental impact associated with traditional polymer materials.

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A biodegradable material and preparation method that can rapidly degrade in the environment without polluting. The material is made by blending polylactic acid, modified bamboo fiber, modified starch, polyethylene, surfactant, UV stabilizer, antioxidant, and stabilizer. The degradable components like polylactic acid, bamboo fiber, and starch allow natural biodegradation. But to speed up degradation, nano-zinc oxide and anatase titanium dioxide photocatalysts are added. These degrade under light exposure, accelerating material breakdown. Without light, the material is normal.

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Fully biodegradable material made from renewable sources like modified polylactic acid, plant fiber, starch, plasticizer, antioxidant, and filler. The material is prepared by extrusion molding the components at specific temperatures. It provides a fully biodegradable alternative to traditional plastics made from petroleum-based polymers. The biodegradable material has applications in products like packaging, utensils, and containers.

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Substrate, vapor-deposited substrate, laminate, and packaging container with improved gas barrier properties for recyclability. The substrate has a polyethylene layer and a surface layer with a resin having a melting point of 150°C or higher, like ethylene vinyl alcohol copolymer. The high melting point surface layer improves adhesion between layers when vapor deposited. This allows using polyethylene for the base instead of less recyclable materials like polyester. The vapor deposition further improves gas barrier properties. The laminate has this substrate plus a sealant layer. The packaging container is made from the laminate.

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Multilayer film for food packaging that combines barrier properties with biodegradability. The film comprises a first, second, and third layer, with the second layer featuring a porous filter paper. The film achieves an oxygen barrier of up to 0.4 cm3/m2, while maintaining sufficient moisture barrier properties. The film's multilayer structure allows for optimal performance in both oxygen-tight and moisture-tight applications, including food packaging and beverage containers.

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A degradable barrier packaging film that combines barrier properties with biodegradability through microorganisms. The film incorporates a biodegradable polymer like polylactic acid (PLA) that decomposes naturally in the environment, replacing traditional non-biodegradable plastics. This film provides excellent barrier protection against air and water vapor, while its biodegradable nature enables the film to break down naturally through microbial action, eliminating the need for traditional waste management solutions. The film also possesses antibacterial properties to prevent contamination.

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A method for preparing high-strength, low-cost, fully biodegradable materials by combining plant fibers and polylactic acid fibers as reinforcing fillers. The method involves processing plant fibers into fibers through a specific spinning process, followed by incorporating them into a biodegradable polyester matrix. The plant fibers enhance the material's mechanical properties while the polylactic acid fibers improve its biodegradability. This innovative approach combines the benefits of biodegradable polymers with natural fibers to create a sustainable, high-performance material.

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A biodegradable material with enhanced mechanical properties and improved degradation rate, comprising a blend of starch, lignin, and polybutylene succinate (PBS). The material is prepared by combining starch and lignin, then mixing with PBS. The starch-lignin blend enhances the material's mechanical properties while the PBS provides a biodegradable matrix. The starch-lignin blend is prepared by a two-step process involving pre-plasticization of starch followed by blending with lignin. The resulting material exhibits improved elongation at break and degradation rate compared to conventional starch-based bioplastics.

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A barrier coating for polymeric films that achieves high gas barrier properties without the need for thick PVDC coatings. The coating consists of an ethylene vinyl alcohol copolymer/ethylene acrylic acid copolymer blend (EVOH/EAA) at a weight ratio of 1.5:1 to 6:1. The blend is applied to a film surface and allowed to dry, producing a thin barrier coating with a percent reduction in oxygen transmission rate of 50% or greater at 23°C, 0% relative humidity. The coating achieves barrier properties comparable to PVDC while maintaining recyclability and reducing production costs.

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Multilayer barrier film for food packaging that provides superior cooking shock recovery, long storage life, and high oxygen barrier properties. The film comprises a retortable outer layer containing EVOH copolymer, followed by a middle layer containing another EVOH copolymer, and a sealing layer. The film achieves these benefits through a multi-layer structure where the middle layer is drawn through a die to form the middle layer, while the outer layer and sealing layer are extruded through a die. This multi-layer design enables optimal oxygen barrier performance and retention of the film's properties during cooking conditions.

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A novel packaging solution for climate-controlled food products that utilizes a combination of EVOH (Ethylene-Vinyl Alcohol) film and recycled Kraft paper to create a sustainable, environmentally-friendly packaging system. The system incorporates a specially formulated Kraft paper that combines the strength of virgin paper with the environmental benefits of recycled materials, while the EVOH film provides hydrophobic barrier properties. The combination enables the creation of a durable, moisture-resistant packaging system that maintains the integrity of food products during transportation and storage, while also reducing waste through recycling.

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Degradable, anticorrosive, and moisture-proof food packaging bag made from biodegradable materials. The bag contains starch, polylactic acid, microcrystalline cellulose, filler, triethoxymethylsilane, microcrystalline paraffin, carbon fatty alcohol polyoxyethylene, acetyl tributyl citrate, crosslinking agent, absolute ethanol, zinc naphthenate, color masterbatch, disproportionated rosin, and antioxidant. The bag provides degradability, corrosion resistance, and moisture protection for food packaging while avoiding the environmental issues of traditional plastic bags.

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Compostable food packaging containers that have a longer shelf life for packaged food items. The containers are made with primarily compostable materials, but also include oxygen barrier materials to prevent spoilage. The containers have at least 90% compostable materials, like PLA, with oxygen barrier layers made of compostable materials like EVOH or polyglutamic acid. This provides a balance of compostability and oxygen barrier performance. The containers can be used for food items like beverage capsules that need oxygen protection.

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A fully biodegradable sheet material and product for disposable packaging that can be fully degraded by microbes or animals when disposed of. The sheet is made by coextruding polymers like polylactic acid (PLA), polybutylene succinate (PBS), and poly-p-dibenzoic acid/butylene adipate (PBAT) with starch, rice straw cellulose, filler, plasticizer, and antioxidant. The coextruded sheet has good degradability, disintegrating into less than 2.1% >2mm pieces within 12 weeks. The biodegradable sheet can be used as a replacement for traditional plastic disposable packaging materials.

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Flexible multilayer packaging material for preserving perishable products like coconut water and coconut pulp. The packaging material is a multi-layer film that can be used to create hermetic, flexible packages for perishable products. The layers include a contact layer made of EVOH, a woven fabric layer, an UV protection layer, and an outer layer. The packaging material aims to reduce contamination and oxidation of the extracted product by providing impermeability to oxygen, gases, and aromatic compounds. The flexible packaging can be used in a device with a hermetic body that sterilizes, stores, and transports the perishable product without oxidation or contamination. The flexible packaging allows easier handling and transport compared to rigid containers.

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