Improve Polyolefin Films Barrier Properties

Masterbatch compositions and film formulations that enhance barrier properties of polyolefin films through synergistic nucleation of hydrocarbon resins and nucleating agents. The masterbatch compositions contain a nucleating agent and a hydrocarbon resin in specific ratios, with the nucleating agent present in concentrations between 0.01% and 1% w/w. The masterbatch is blended with bulk polyethylene to form barrier layers in films, achieving significantly reduced water vapor transmission rates compared to films without the masterbatch.

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Integrated high-barrier packaging material for photovoltaic cells featuring a multi-layered structure comprising adhesive, light management, gas barrier, mechanical transition, and insulating support layers. The material is produced through multi-layer co-extrusion, where each layer is formulated with a specific resin system and cross-linking agent. The layers are combined in sequence with controlled melt temperatures to achieve optimal barrier properties. The material's thermal stability, mechanical integrity, and optical performance are enhanced through precise layer selection and processing conditions.

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Masterbatch compositions comprising a nucleating agent, a hydrocarbon resin, and a polyolefin, specifically a polyethylene, for preparing barrier layers in films. The masterbatch compositions achieve improved barrier properties through homogeneous nucleation and dispersion of the nucleating agent and hydrocarbon resin within the polyolefin carrier, enabling the formation of barrier layers in blown films with enhanced water vapor resistance and oxygen permeability.

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A thin, heat-shrinkable film for food packaging applications that combines excellent adhesion, dimensional stability, and odor barrier properties. The film achieves these characteristics through a unique blend of polyamide and polyolefin components with tie layers between the polymers, combined with radiation cross-linking and moisture treatment. The film has a thickness of less than 25 microns, with specific shrinkage properties measured at 90°C for 4 seconds.

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Chemically resistant laminate for packaging materials that combines high barrier properties with excellent mechanical strength and aesthetic appeal. The laminate features a multilayer outer film with a barrier layer sandwiched between polyolefin layers, and a multilayer middle film with a barrier layer sandwiched between polyolefin layers. The outer film's barrier layer is metallized with aluminum, nickel, or chromium, while the middle film's barrier layer is metallized with aluminum, nickel, or chromium. The laminate achieves optimal barrier properties through a unique polyolefin layer configuration that balances barrier performance with mechanical integrity. The laminated structure is then sealed with a polyolefin-based sealant film.

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High barrier masterbatch for BOPP film, comprising 60-90 parts of polyolefin, 10-40 parts of multilayer barrier material, 0.5-5 parts of graft modifier, 0.5-5 parts of small molecule monomer and 0.01-1 parts of initiator in parts by weight. The masterbatch is prepared through hot-melt extrusion using a twin-screw extruder, with a specific processing temperature range of 205-215°C and screw speed of 180-220 rpm. The resulting masterbatch is then compounded into BOPP film, where it forms a barrier film with enhanced performance properties.

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Multilayer packaging structure for food applications that provides improved barrier properties while being bio-degradable and compostable. The multilayer has an inner layer made of a crosslinked mixture of water-soluble polymers like PVOH and PCL, which improves oxygen barrier. An outer layer made of a wax like beeswax provides water vapor barrier. This enables a multilayer with both oxygen and water vapor barrier properties using biodegradable materials.

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Nucleating agent-free and LLDPE-free polyethylene film composition for water vapor and oxygen barrier applications. The composition comprises a bimodal polyethylene homopolymer comprising ethylene and a nucleating agent-free, LLDPE-free polyolefin component, and a monomer with a molecular weight between 1000 and 2000 g/mol. The composition is manufactured through a single gas phase polymerization process in a reactor containing a floating bed of resin.

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Polymeric substrate for packaging applications that combines barrier properties with mechanical strength and transparency. The substrate comprises a polyolefin polymer matrix with a hydrocarbon resin content, achieving a barrier thickness of 200-6500 μm while maintaining high tensile modulus (1,000 MPa) and thermal stability (45°C). The substrate can be formed through thermoforming processes, enabling efficient production of shaped packaging components.

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Coated structures and sheet products for packaging that achieve barrier properties through renewable materials. The coatings are formulated with cellulose-derived polymers and inorganic pigments, where the cellulose components provide barrier performance while the pigments enhance durability. The formulations meet recycling requirements and are biodegradable, making them suitable for packaging materials intended for recyclable waste streams. The coatings exhibit superior barrier properties compared to conventional petroleum-based barrier materials.

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Polymeric substrate with enhanced barrier properties for water vapor and gases, achieved through a polyolefin polymer (50 wt. % or more) and hydrocarbon resin composition. The substrate exhibits superior barrier performance, including high oxygen transmission rates and water vapor transmission rates, while maintaining mechanical integrity and optical clarity. The substrate's barrier layer achieves a thermal transition temperature (TTL) of 45°C or higher and tensile modulus of 1,000 MPa or higher. The barrier layer thickness can be tailored from 200 μm to 6,500 μm.

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High-barrier hose packaging composite sheet that replaces aluminum-plastic packaging for products like toothpaste tubes. The composite sheet has improved barrier properties while reducing thickness and cost compared to aluminum-plastic alternatives. The composite sheet has a sequential layer structure starting with a heat-sealing layer, followed by adhesive layers, a barrier layer, and a support layer. The barrier layer contains modified polyethylene, oxygen barrier resin, and water barrier resin. This allows recyclability and reduces total thickness compared to aluminum-plastic packaging.

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Multilayer films comprising polyethylene that exhibit improved balance of toughness and creep resistance, maintaining physical properties even at reduced thicknesses. The films incorporate a polyethylene core layer with a modified composition distribution profile, featuring a peak in the temperature range of 45-87°C and a peak in the temperature range of 95-120°C. This profile enables the core layer to balance toughness and creep resistance while maintaining film properties at reduced thicknesses.

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A recyclable, high-barrier bottom film for medical and food packaging applications that combines the benefits of polyethylene and polypropylene materials. The film comprises a heat-sealable barrier layer with multiple layers of modified polyethylene (HDPE) and polypropylene (PP) layers, with nano-calcium carbonate as a filler. The barrier layer is combined with a heat-sealable layer using a combination of HDPE and MLLDPE, with additional components such as EMAA, talc, and slip agent. The film achieves enhanced barrier properties through a combination of polyethylene's natural barrier properties and the modified polyethylene layers, while maintaining recyclability through the use of nano-calcium carbonate as a filler.

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A recyclable multilayer barrier film for food packaging that provides gas and water vapor barrier without using metal foil. The film is made of thermoplastic polymers like ethylene vinyl alcohol (EVOH) sandwiched between layers of polyethylene (PE) or polypropylene (PP). The EVOH layers provide the gas and water vapor barrier while the PE/PP layers encapsulate and seal the EVOH. The film can have up to 15% EVOH, 50-60% PE/PP, and 7.5-20% adhesive polymers. The film can be oriented and laminated to further improve barrier properties. This allows making a fully recyclable barrier film suitable for food packaging without metal foil.

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A multilayer barrier film for packaging applications with improved barrier properties by using thinner barrier layers compared to conventional films. The film has a polyolefin core layer sandwiched between barrier layers. The barrier layers are individually very thin, in the range of 1-25 microns, allowing reduced thickness compared to conventional barrier films. This reduces weight and cost while maintaining or improving barrier properties.

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Barrier film for paper and paperboard based packaging materials with improved oxygen and water vapor barrier properties at high temperatures and humidity. The film has a microfibrillated cellulose (MFC) layer, a vacuum coating layer, and a protective coating layer. The vacuum coating protects the MFC from damage and prevents delamination. The protective coating is a crosslinked water-soluble polymer that stabilizes the MFC at high humidity and temperature. This provides stable oxygen and water vapor barrier properties even at 85% RH and 38°C. The barrier film can be used in paperboard packaging materials like liquid packaging board with improved barrier and recyclability.

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Composite plastic hose with enhanced barrier properties through a modified polypropylene material. The hose comprises an outer layer of cyclic olefin copolymer-modified polypropylene, an adhesive layer of maleic acid grafted polypropylene, a barrier layer of ethylene-vinyl alcohol copolymer, and an inner layer of polypropylene. The modified polypropylene outer layer incorporates cyclic olefin copolymer, which enhances the material's water vapor barrier properties while maintaining its excellent oxygen barrier properties.

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Multilayer film packaging material for food storage that provides excellent oxygen barrier, odor suppression, and flavor preservation. The multilayer film has layers in order: sealing layer, oxygen absorption layer, oxygen barrier layer. The oxygen absorption layer contains iron powder and a thermoplastic resin. This layer absorbs oxygen. The sealing layer prevents contact between the food and the iron layer. The oxygen barrier layer prevents oxygen ingress. This design allows oxygen scavenging without odor transfer or flavor degradation when storing foods with water activity 0.3-1.0.

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Monomaterial polyethylene multilayer films and laminates for flexible packaging that balance properties like thermal resistance, forming speed, stiffness, and seal strength. The films have at least 3 layers. The outer layer contains a high comonomer distribution index ethylene copolymer (MWCDI > 0.9) with specific melt index ratios. The inner layer has a lower density ethylene homopolymer. This combination improves forming speeds by increasing thermal resistance and stiffness compared to pure low density polyethylene.

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Multilayer barrier film for packaging applications with enhanced barrier properties compared to similar thickness films. The film has a core layer sandwiched between two thin barrier layers. The barrier layers are separately very thin, like 1-25 microns, but together provide superior barrier properties. The core layer is typically polyolefin. This structure allows using thinner barrier layers to achieve the same or better barrier properties. The thinner barrier layers can be connected by tie layers to ensure adhesion. The overall film thickness is in the range of 20-400 microns.

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Multilayer barrier film for packaging that enhances barrier properties through optimized barrier layer thickness distribution. The film comprises a polyolefin core layer, a barrier layer on both sides, and a polyolefin layer adjacent to the barrier layer. The barrier layer thicknesses range from 1 pm to 25 pm, with the polyolefin layer thicknesses ranging from 1 pm to 60 pm. The film's unique barrier layer thickness distribution enables improved barrier properties while maintaining processability and structural integrity.

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Multilayer film for packaging that combines high stiffness and resilience with reduced material weight and environmental impact. The film comprises a barrier layer, sealant layer, and adhesive layer, with polyethylene content optimized to 80-95% of the total film weight. The barrier layer provides structural integrity, while the sealant layer enhances adhesion between layers. The adhesive layer enables bonding between layers while maintaining high polyethylene content. The film achieves its unique combination of properties through a specific polyethylene content profile and optimized layer thickness ratio.

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Recyclable high-barrier oxygen membrane material and its preparation method for replacing aluminum-plastic composite films. The membrane has a structure of a polyolefin functional layer, an ethylene-vinyl alcohol copolymer (EVOH) intermediate barrier layer, and another polyolefin functional layer. The total thickness is 150-400 microns. The EVOH layer ratio is below 10%. The layers are tightly bonded by an adhesive resin. The membrane is prepared by blow molding the layers simultaneously. This improves composite strength and stability. The blow molding allows higher EVOH content compared to coextrusion, reducing barrier layers. The thickness ratio and total thickness enable better oxygen barrier. The blow molding with thick film stretching prevents defects.

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High-temperature retortable packaging film with strong solvent resistance and low precipitation for retortable food packaging. The film structure has an outer PET layer, a modified high-density PE connecting layer, an aluminum barrier layer, another modified high-density PE connecting layer, and an inner three-layer composite layer. The inner layer is free of additives. The modified high-density PE has high molecular weight and softening point to reduce additive migration and precipitation. The aluminum barrier prevents additive diffusion. The composite inner layer prevents softening at high temps.

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One-time blown film forming asymmetric sheet technology for packaging materials that eliminates the need for separate layer preparation and compounding. The sheet features a unique sequential layer arrangement with an inner film layer, a first connection layer, a barrier layer, and a second connection layer. The sheet achieves high sheet strength, adhesion, and stability while minimizing environmental impact through optimized layer thicknesses.

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A laminate structure for packaging materials with improved strength, barrier properties, and recyclability. The laminate has a base layer made of high-density polyethylene (HDPE) sandwiched between inner and outer layers of medium-density polyethylene (MDPE) and low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE) or ultra low-density polyethylene (ULDPE). An intermediate layer with a vapor-deposited film between the base and heat seal layer further improves properties. This allows using recycled HDPE as the base layer instead of bonding dissimilar resins, enabling recycling of the entire laminate.

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Laminated co-extruded film containing dual protective core barrier layers for enhanced heat shrinkage performance in packaging applications. The film comprises a laminated structure with a dual-protection core barrier layer, comprising an EVOH layer on both sides, and an outer layer. The core barrier layer is bonded to the EVOH layer through a direct connection, eliminating the need for intermediate adhesives. This design enables uniform deformation of the EVOH layer during heat shrinkage, while maintaining the film's barrier properties. The laminated structure ensures consistent performance across different packaging conditions.

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Easily openable gas barrier packaging material with improved oxygen and water vapor barrier properties and bending resistance compared to conventional multi-layer barrier materials. The material has a simplified 6-layer structure with an easily openable sealant layer. The layers are a base material, gas barrier organic adhesive, gas barrier inorganic vapor deposition, and sealant. The sealant is adjacent to the inorganic barrier. This simplified structure reduces the total layer count compared to conventional barrier materials. The easily openable sealant allows easy opening while the inorganic barrier provides high gas barrier properties. The simplified structure enables easier processing compared to complex multi-layer materials.

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Multilayer films for packaging applications that combine barrier protection and enhanced sealing properties. The films comprise a core layer of a high-barrier polymer, such as ethylene-vinyl alcohol (EVOH) or polyvinylidene chloride (PVDC), sandwiched between skin layers that can be metallized and printed. The skin layers are formulated with additives that enhance metal adhesion and barrier properties, enabling metallization and maintaining integrity when laminated to other webs. The films provide a balance of barrier protection and sealing performance for packaging applications.

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A multi-layer co-extrusion sheet for high-barrier, extrusion-resistant all-plastic hoses that achieves improved barrier properties through an asymmetric structure. The sheet comprises an inner layer, a first adhesive layer, and a second adhesive layer, with the adhesive layers having different thicknesses. The sheet is prepared using a co-extrusion process that melts the adhesive layers together while maintaining the structural integrity of the individual layers. This multi-layer design enables enhanced barrier performance and extrusion resistance compared to conventional single-layer materials.

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A high-barrier film for composite all-plastic hoses that achieves superior barrier performance through a novel multi-layer structure. The film comprises a high-density polyethylene (HDPE) base layer, a high-density polyethylene (HDPE) middle layer, an ethylene-vinyl acetate (EVOH) barrier layer, an adhesive layer, a maleic acid grafted linear low-density polyethylene (EVOH) adhesive layer, and a high-density polyethylene (HDPE) outer layer. The film's unique interlayer structure with optimized thickness ratios enables enhanced barrier properties while maintaining recyclability and cost-effectiveness.

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Barrier films made from high density polyethylene (HDPE) resins with improved water vapor transmission rate (WVTR) for food packaging. The films are prepared by blending two HDPE resins with different melt indices and adding a small amount of a calcium salt of 1,2-cyclohexanedicarboxylic acid. The blended HDPE resins have a density of 0.950-0.975 g/cc and a high melt index resin to low melt index resin ratio greater than 10:1. The calcium salt improves barrier properties compared to the unmodified blend. The films have 20-61% lower WVTR than a control without the salt.

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High-barrier oxygen barrier film for food packaging that maintains oxygen barrier performance after sterilization. The film combines a high barrier EVOH layer with an oxygen-absorbing layer and a water-resistant adhesive layer. The film is prepared through a multi-layer co-extrusion blown film process, ensuring consistent oxygen barrier properties throughout the sterilization process. This approach prevents the degradation of the oxygen barrier properties typically associated with water sterilization, while maintaining the barrier performance after sterilization.

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Barrier films for packaging sensitive products that overcome the moisture resistance limitations of cellulose nanofibril (CNF) materials. The films have a gas barrier layer made of CNF encapsulated between vapor deposited coatings on both sides. The coatings provide water vapor barrier properties to prevent moisture ingress. This allows the CNF layer to retain gas barrier properties even at high humidity levels. The encapsulated CNF films can be used in laminated packaging materials for long-term liquid food storage without aluminum foil.

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Multilayer packaging for food preservation that prevents oxygen transfer while maintaining flavor. The packaging consists of a thermoplastic resin layer, an iron powder-based oxygen-absorbing layer, and a specialized barrier layer. The multilayer structure prevents oxygen penetration while maintaining the integrity of the food's flavor profile.

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Flexible packaging film with ultra-high oxygen barrier properties for applications like food packaging. The film has multiple layers including an inner layer with a thin transparent oxide coating like silicon oxide or aluminum oxide, an intermediate layer with a tie layer or primer to anchor the oxide coating to the substrate, and an outer layer of a base film like polyethylene terephthalate (PET). The thin oxide coating provides excellent oxygen barrier while the tie layer prevents delamination during flexing. The film maintains ultra-low oxygen transmission rates even after folding and flexing.

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Laminate and packaging material with improved oxygen barrier properties and bend resistance. The laminate has a base layer, adhesive layer, barrier layer, and sealant layer. The adhesive layer has oxygen barrier properties. The barrier layer can be a vapor-deposited film sandwiched between the adhesive and sealant layers. This filled-in recess structure provides an oxygen barrier. Adding a barrier coat layer between the base and vapor-deposited barrier further enhances barrier properties. The coated barrier layer sandwiched between the adhesive and sealant layers provides an oxygen barrier. The laminate and packaging material have improved oxygen barrier and bend resistance compared to traditional laminates.

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Multilayer plastic film with improved oxygen barrier and mechanical properties through optimized polymer arrangement. The film comprises a central oxygen barrier layer, a first barrier layer on one side of the central layer, a second barrier layer on the other side, an outer layer, and a sealant layer. The film's structure incorporates a micro-block arrangement of PA and tie resin layers in the central barrier layer, with tie resin layers providing cushioning between the barrier layers. This arrangement enables improved barrier properties while maintaining the film's structural integrity.

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A gas barrier packaging film that provides excellent oxygen and vapor barrier properties while maintaining good heat sealing and easy tear properties. The film consists of multiple layers including an outer low adsorption resin layer, adhesion layers, a vapor barrier layer, and an inner adhesion layer. The outer layer is a polyether block amide (PEBA) with low oxygen and water vapor permeability. The adhesion layers are polyurethane and low density polyethylene (LDPE) for bonding. The vapor barrier layer is cyclic olefin copolymer (COC) like cyclic olefin polymer (COP). This layer sandwiched between the adhesion layers provides superior vapor barrier compared to just the PEBA layer. The inner LDPE adhesion layer allows easy tearability. The film is manufactured by coextrusion and lamination to form

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Cyclic olefin copolymer modified polyolefin composite water-resistant flexible packaging material for improving barrier properties and processability of polyolefin films. The material contains 40-55% cyclic olefin copolymer, 35-45% polyethylene, 2-15% modified polypropylene, and 2-8% ethylene-octene copolymer. The modified polypropylene is made by blending polypropylene with sodium benzoate and lignin and extruding it. This composition provides enhanced water resistance, tear strength, and processability compared to pure polyolefin films.

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Sealant film for packaging materials made from a polyethylene resin derived from renewable resources like sugar cane. The film has a multi-layer structure with a plant-derived linear low-density polyethylene (LLDPE) as the intermediate layer, and petroleum-derived LLDPE as the outer and inner layers. This allows reducing the amount of petroleum-based resin in the sealant film while maintaining processing suitability. The plant-derived LLDPE is made by vapor phase polymerization of ethylene and α-olefin from biomass sources. The film can also be laminated with a base film to further reduce petroleum resin content in packaging materials.

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Multilayer container with improved oxygen barrier and deoxidizing properties, particularly for packaging heat-sterilized food products. The container comprises a multilayer structure comprising an oxygen barrier layer comprising a thermoplastic resin, an oxygen-absorbing layer comprising a thermoplastic resin, and an outer layer comprising a thermoplastic resin. The oxygen barrier layer comprises a polyamide resin containing 15-30 mol% aromatic dicarboxylic acid units, the oxygen-absorbing layer comprises a deoxidizing agent composition, and the outer layer comprises a thermoplastic resin. The container exhibits enhanced oxygen

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A high acid-resistant barrier plastic film for lithium-ion battery applications. The film comprises a polypropylene base layer, a cyclic olefin copolymer layer, a polypropylene layer, a plasma treatment layer, an adhesive layer, a nano-silicide layer, a nano-titanium layer, an aluminum foil layer, a passivation layer, and a polypropylene layer.

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Stretchable multi-layer barrier film for agricultural applications like wrapping bales and silage that provides improved oxygen barrier compared to single layer films. The film has a structure of exterior layers, a barrier layer sandwiched between tie layers, and optional interior layers. This allows stretching without compromising barrier properties. The barrier layer prevents oxygen ingress while the tie layers connect the exterior and barrier layers. The film can be pre-stretched before winding. The barrier layer can have EVOH for oxygen barrier and tie layers can have LLDPE.

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A process for producing barrier materials that enhance gas barrier properties through controlled phase morphology. The method involves creating barrier materials with a dispersed phase that exhibits unique morphology under deformation, particularly through biaxial stretching. This phase morphology enables enhanced gas diffusion resistance through increased tortuosity, leading to improved barrier performance. The dispersed phase can be a polymer with controlled phase morphology, such as spherical particles or sheet structures, which can be produced through controlled phase transformation. The barrier material can be prepared through a single-step process using a specialized mixing device that enables controlled deformation of the dispersed phase.

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Oxygen absorption resin composition that prevents food and beverage products from oxidation through a novel light-activated gas barrier system. The composition contains a thermoplastic resin with a built-in gas barrier layer, where an oxygen-permeable oxide layer is formed through thermal curing. The oxide layer is then treated with a light-activated initiator that prevents ozone formation during storage. This system provides long-lasting oxygen removal while maintaining transparency and appearance, making it suitable for packaging applications.

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A biodegradable plastic pipe with an inner barrier layer that can protect against oxygen and moisture degradation while the outer layers degrade. The inner barrier layer is made of nanomodified polypropylene carbonate ester (PPCE). The nanomodification involves mixing nanoclay with PPCE during melt processing. This provides a biodegradable barrier layer with good oxygen barrier properties. The outer layers are made of polyolefin plastics. The inner layer thickness is 50-150 microns, the outer layer thickness is 100-600 microns, and the adhesive layer thickness is 20-100 microns.

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