Polymer Blend Processing for Packaging Materials

Packaging film with improved gas barrier properties and reduced polymer degradation when recycled. The film has a gas barrier layer, an adhesive layer, and a sealant layer. The gas barrier layer has a soft coating layer between the vapor deposition layer and adhesive. The coating layer's hardness is 1.15 GPa or less. The adhesive layer is made by bonding a polyolefin adhesive composition to the gas barrier layer via melt extrusion. The sealant layer contains polyolefin resin. This film design allows good gas barrier performance without decreasing the polyolefin content in the film. The coating layer softness relaxes deposition layer stresses to prevent cracking. The soft adhesive layer allows shrinkage without transmitting stresses. This preserves barrier integrity during processing. The soft coating and adhesive layers prevent polymer

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Hybrid clamshell container for packaging products that has a base made of a cellulosic material like paperboard and a cover made of a plastic material. The container has a hinged lid that folds over and clips to the sides in the closed position. This allows the strength and recyclability benefits of paperboard for the base while using plastic for the cover to improve durability and stackability. The container can be formed by manipulating a blank with separate paperboard and plastic components that join together.

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Multilayer film for vacuum insulation materials that reduces defects during production and after bending compared to conventional films. The film has an EVOH layer sandwiched between an adhesive layer and a thermoplastic resin layer. The EVOH contains ethylene-vinyl alcohol copolymer with 20-30 mol% ethylene content. The thermoplastic layer is polyethylene and is stretched 3-12 times. This configuration reduces defects when the insulation is bent and during production compared to films with other resins. The film can also have a vapor-deposited layer on the EVOH side.

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Biodegradable and compostable polymer compositions for flexible food packaging films that have low water vapor permeability. The compositions contain a mixture of biodegradable polyesters, including rigid polyesters like PBS, PLA, and PHA, as well as flexible polyesters like PBAT and PCL. The compositions also have small amounts of hydrophobic additives like behenamide. The blends have desirable mechanical properties like high modulus, strength, and elongation for packaging applications.

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Laminated films for packaging materials that have excellent retort resistance at high temperatures and impact resistance at high temperatures for applications like retort sterilization. The films have a layered structure with a surface layer, an intermediate layer, and a heat-sealable layer. The surface layer contains a copolymer of ethylene and a monomer like ethyl acrylate or methyl acrylate. The intermediate layer contains a copolymer of ethylene and a monomer like ethyl acrylate, methyl acrylate, or maleic anhydride. The copolymers in the layers have specific compositions and Mw/Mn ratios for balanced retort resistance and impact strength. The layered film structure provides both good retort resistance at high temperatures and impact resistance at high temperatures.

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Adhesive structure for packaging boxes that improves adhesion strength between side plates by using different adhesives with complementary properties. The structure involves two adhesive types, like hot melt and water-based emulsion, applied side by side on the side plate folding surfaces. An adhesive hole is formed between the adhesive sections. The holes are filled with either adhesive type to increase adhesion area. This leverages the advantages of each adhesive type, like heat resistance vs water resistance, while mitigating their weaknesses.

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Barrier substrate for packaging containers with excellent gas barrier properties. The barrier substrate is made by coextruding a polyolefin-based stretched film with two resin layers containing polyolefin as the main component and an optional adhesive layer. A vapor deposition film is then applied to the outer surface. The barrier substrate can replace metal-coated substrates for better recyclability. The polyolefin-based barrier has good gas barrier properties and can be used in packaging containers without delamination or corrosion issues when filled with reactive contents.

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Environmentally friendly and convenient tissue packaging container that avoids contamination issues and reduces waste compared to conventional containers. The container has a divided interior with a cut groove separating two zones. The container is made by laminating layers of polyethylene, polypropylene, and a shellac polymer. The groove is formed by laser cutting. This allows easy opening without a separate sealing strip. The divided interior prevents adhesive seepage into the tissues. The container can be manufactured in one step by laminating and cutting instead of separate sealing steps.

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Multilayer film with high antiviral performance and recyclability for packaging applications. The film has a sealing layer containing photocatalytic microparticles and a reduction in water contact angle of 3 degrees or more. The sealing layer is predominantly polyethylene or polypropylene resin. The film structure includes an intermediate layer, cyclic olefin resin layer, and sealing layer. The sealing layer prevents migration of antibacterial agents to adjacent layers. The film provides antiviral properties without sacrificing recyclability.

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Eco-friendly vinyl packaging material that replaces aluminum and starch, decomposes over time, and reduces greenhouse gas emissions when incinerated. The packaging material contains a blend of high-density polyethylene (HDPE), low-density polyethylene (LDPE), biodegradable bionyl, and additives like stearic acid, copper, manganese, zinc, calcium carbonate, softener, and octene. The bionyl includes ethylene vinyl acetate (EVOH), a biodegradable mixed powder, and an oxidative biodegradable catalyst. The packaging is manufactured by extrusion and stretching the blended material. It can be used for food and cosmetics packaging that decomposes over time and reduces environmental impact compared to traditional vinyl.

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Multilayer substrate for packaging materials with improved gas barrier properties and adhesion between layers. The substrate has a stretched polypropylene layer sandwiched between an outer layer and an inner coating layer. The coating layer contains a resin with polar groups to improve adhesion of subsequent layers like vapor deposited films. This prevents delamination and improves gas barrier performance compared to polypropylene-only substrates. The multilayer substrate can be used in packaging applications and the packaging material is made by laminating the substrate with additional layers like vapor deposited films and sealant layers.

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Contact lenses packed in a solution to improve initial comfort and reduce dryness during wear. The contact lenses are immersed in a packaging solution containing a specific polymer blend. The solution has a viscosity of 2-8 cP and comprises a poly(2-oxazoline) and an acrylates/C10-30 alkyl acrylate crosspolymer. This solution improves initial comfort upon lens insertion and reduces dryness during wear compared to conventional contact lens storage solutions. The specific polymer blend provides lubricity and reduces friction when the lens moves in the eye.

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Sealant film for packaging applications that enables recycling of mixed resin materials. The film has a layer containing recycled material with two or more resin types, followed by a separate sealant layer. The recycled layer has small, localized regions with lower transmission compared to the surrounding. These regions have maximum area and aspect ratio limits to prevent clumping. This allows recycling mixed resins while maintaining sealant and mechanical properties.

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A three-layer structure discharge nozzle for producing packaging bands with improved tensile strength at a lower cost. The nozzle is used in a device that manufactures packaging bands. The bands have a three-layer structure with an outer layer made of a high-tensile strength material and an inner layer made of a lower cost material with lower tensile strength. This allows using a more expensive, high-performance material for the outer layer where it contacts the product, while the inner layer can be a cheaper material with lower strength. This improves band strength and quality compared to using a single layer, without requiring multiple colors or expensive materials throughout the band.

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Bag for packaging fruits and vegetables that prevents mold growth and spoilage without sacrificing visibility of the contents. The bag has a first region made of a polylactic acid (PLA) film and a second region made of a paper sheet. The paper sheet can be a laminate with a resin layer. The paper sheet basis weight is 100 g/m2 or less. The PLA film density is 1.0 g/cm3. The regions are bonded by heat sealing or an adhesive. This configuration using PLA film and paper inhibits mold growth better than just PLA film alone. The paper prevents mold while allowing visibility.

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Eco-friendly laminated film for packaging applications that maintains barrier properties and bonding strength after heat sterilization. The film has layers: an outermost stretched PP film, a barrier coating of modified PVA, an adhesive layer, an inner stretched PP film, and a heat seal layer of unstretched PP with lower melting point than the outermost layer. The barrier coating contains modified PVA crosslinked with organosilane compounds. The inner PP film has a lower melting point than the outermost film. This configuration allows the film to retain gas barrier and adhesion after heat sterilization.

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Biaxially stretched polyamide film with improved properties for food packaging and alcohol evaporants. The film has a specific composition and structure to balance properties like bending pinhole resistance, puncture strength, dimensional stability, and ethanol penetration. It contains polyamide 6 as the main component, with dispersed particles of a resin like PBAT, PEE, or POE having a maximum diameter of 1 μm or more. This provides plane alignment and crystallization parameters that enhance performance.

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Recycle-ready pouches for packaging liquid and viscous food and non-food products that are fully recyclable and can withstand various processing conditions. The pouches are made from multi-layer laminate films containing a compatibilizer component that makes the polymer materials recyclable. The films have separate webs for the exterior and interior surfaces that are joined to make the pouch. The exterior web has a print layer and the interior web has barrier and tie layers. An adhesive joins the webs. A compatibilizer in the barrier layer enables recycling. The pouch structure allows hot fill processing while preserving products.

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Flexible packaging film that provides robustness for bag-in-box and spouted pouches while allowing recyclability. The film has three layers: a biaxially oriented polyamide cap layer, a core layer, and a blown polyethylene seal layer with a compatibilizer. This combination provides strength for packaging rigors while having recyclable components. The polyamide cap and polyethylene seal can be recycled separately.

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Multilayer film with excellent gas barrier properties, appearance, and recyclability, particularly for wide width films like 500 mm. The film has an outermost layer made of a specific resin composition containing EVOH with 20-50 mol% ethylene content and 90 mol% saponification, and 350-2000 ppm of polyvalent metal ions like Mg, Ca, Zn, Co, Mn. This improves slipperiness between surfaces during extrusion to reduce defects. The film also has inner layers of adhesive and polyolefin resins. The composition allows wide width films with good appearance, gas barrier, and recyclability.

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