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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