Antioxidant Technologies for Packaging Stability

Multilayer lightweight foam film for aseptic packaging applications that replaces paper boards. The film has a foam layer with closed cells sandwiched between skin layers and an EVOH layer. The foam layer protects the EVOH barrier from damage during processing. The foam layer has at least 10% closed cells. The film has overall thickness >8 mils and creasing/folding OTR <10% of uncreased film OTR. This prevents barrier deterioration. The foam film provides lightweight recyclability and oxygen/moisture barrier for aseptic food packaging.

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Thermoplastic resin film with improved oxygen barrier properties by adding layered minerals to olefin-based resins. The film has a matrix phase made of polyolefin resin and a dispersed phase of flat layered clay minerals. The layered clay minerals peel off to form a maze structure with long axis in film direction. The volume concentration of clay is 1-40%. This configuration provides a labyrinth effect for oxygen barrier without needing lamination or coatings.

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Oxygen and moisture barrier packaging material that uses only polyethylene film to provide sufficient barrier properties. The material consists of layers like stretched polyethylene, blocking layer, adhesive layer, non-stretched polyethylene, and can have additional components like resin barrier layer, heat-resistant layer, and printed layer. The stretched polyethylene provides initial barrier, the blocking layer prevents contaminants from reaching the adhesive, and the adhesive bonds the layers. The non-stretched polyethylene seals the contents. The material allows recycling without reducing yield since all layers are polyethylene.

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Biodegradable barrier film for packaging applications that has improved oxygen barrier properties and transparency compared to existing biodegradable films. The film is made by alternately laminating layers of an aliphatic polyester like polylactic acid and a polyvinyl alcohol. This structure provides both oxygen barrier and transparency. The layers are melt extruded, alternated, and then biaxially stretched and heat set to form the film.

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Packaging material for oxygen scavengers that provides both oil resistance and good deoxidation performance without using fluorine-based oil-resistant papers. The packaging has three layers: an inner layer with a thermoplastic resin, a middle layer with an oil-resistant paper that doesn't contain fluorine, and an outer layer with a thermoplastic resin. It also has internal and external ventilation holes penetrating through the layers. This allows air exchange while preventing oil seepage from the inside. The non-fluorine oil-resistant middle layer prevents oil ingress into the deoxidizer. The holes prevent moisture and oil from trapping inside, while the middle layer stops oil seepage.

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Paper-based packaging material with high barrier properties to gas, water vapor, odor, and fat for food packaging applications. The packaging has a metallized layer on one side, typically aluminum applied by transfer metallization. Additional functional coatings are added to improve barrier properties. The metallized layer is bonded to the base paper using an adhesive. Coatings like PVOH or saccharide solutions are applied to the metallized side to block oxygen, moisture, and odor. A protective layer is added over the barrier coatings to prevent moisture degradation. The final packaging can have both metallized and non-metallized sides for aesthetics. The coating steps are done after transfer metallization.

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Barrier-coated cellulose-based fibrous substrate for use in oxygen-sensitive packaging materials like cartons for liquid foods. The substrate has a cellulose base with a steam-resistant coating and an oxygen barrier coating applied by dispersion coating and drying. The cellulose substrate density is 700-800 kg/m3 and grammage 30-80 g/m2 for good porosity. The steam coating contains inorganic particles and polymer binder. This improves adhesion for the oxygen barrier coating. The substrate provides oxygen barrier in laminated packaging materials.

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Recyclable packaging film with improved oxygen barrier properties for food packaging that can be recycled after use. The film has an irradiated ethylene vinyl alcohol (EVOH) layer sandwiched between two layers of polypropylene (PP). Exposing the EVOH layer to ionizing radiation enhances its oxygen barrier properties. However, the adjacent PP layers play a role in this effect. PP prevents radiation from fully enhancing the EVOH barrier. But PP still allows some radiation to improve the EVOH barrier. The ethylene content of the EVOH layer also affects radiation enhancement. Higher ethylene content reduces radiation's effect on barrier properties.

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Laminated packaging material for oxygen-sensitive food products like liquid, semi-liquid, or viscous foods that provides improved gas barrier properties and integrity compared to conventional aluminum-based packaging. The non-foil laminate has a core layer of paper or paperboard, an outer heat sealable polymer layer, an inner heat sealable polyethylene layer, and a barrier-coated polymer film between the core and inner layer. The barrier film has a polypropylene substrate coated with a vapor deposited barrier like aluminum oxide or diamond-like carbon. The barrier film is bonded to the inner polyethylene layer using a linear low density polyethylene interlayer made with single-site catalysts. This configuration provides excellent gas barrier, adhesion, and seal integrity compared to conventional laminates.

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Halogen-free metal bottle caps with improved sealing performance for containers like beer bottles. The caps have a molded sealing insert made from a specific polymer compound. The compound contains a scavenger that captures oxygen to prevent taste alterations in the contained beverages. The scavenger is incorporated into the sealing insert during molding. The caps can be made thinner than conventional ones by using a lower gauge tinplate because the molded sealing insert provides sufficient sealing force. The thinner caps save material costs. The scavenger in the sealing insert prevents oxidation and flavor alterations of the contained beverages by capturing oxygen that enters the container.

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Biodegradable packaging made from paper impregnated with propolis extract to provide biocidal and antioxidant properties. The paper is treated with water or ethanol extracts of propolis, a natural bee product with antibacterial, antifungal, and antioxidant activity. The impregnated paper can prevent microbial growth on food products during storage. The propolis extracts also have antimold and antifungal effects. The paper packaging degrades faster than regular paper due to the nutrients in propolis enriching the soil. Consumers prefer the propolis paper due to its natural origin and health benefits.

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Cost-effective, recyclable, foil-free laminated packaging material for long-term aseptic packaging of liquid foods. The packaging material has a barrier coating made from reduced graphene oxide applied to a substrate. The graphene oxide is dispersed in water and coated using aqueous dispersion coating methods. The coated substrate is then laminated with other layers to form the packaging material. The graphene oxide reduces in situ to provide oxygen barrier properties. This allows foil-free, recyclable packaging for long-term aseptic storage of liquids without aluminum.

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Environmentally friendly packaging material with improved gas barrier properties, processability, and toughness for convenience. The packaging material has a laminated structure with a base film mainly made of polyolefin resin and a heat-sealable layer. At least one base film is a laminated film with a gas barrier layer. The peeled-off base film has low thermal elongation (6% or less at 130°C) and low oxygen permeability (60 ml/m2 at 23°C/65% RH) for environmental benefits. The gas barrier layer can be inorganic thin films or coatings. The laminated structure provides gas barrier, heat resistance, and sealability while reducing environmental impact compared to mono-material designs.

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Heat sealable film made from propylene derived from bionaphtha that has reduced environmental impact compared to petroleum-based films. The film contains at least 10% bionaphtha-derived propylene units relative to the film mass and 300-1000 ppm of phosphorus-based antioxidant. This composition reduces change in color, transparency, and mechanical properties compared to films with lower bionaphtha content. The film can be used for packaging materials and laminated structures.

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Biodegradable packaging container with improved oxygen barrier and moisture resistance using a biodegradable composition coating. The composition contains polyvinyl alcohol (PVA), an organic dispersant like levan, and a crosslinking agent with a carboxylic acid group. The levan disperses in the PVA forming a core-matrix cluster effect that makes the surface hydrophobic. The crosslinking agent induces crosslinking between the PVA chains to reduce internal swelling. This improves moisture resistance without affecting the high oxygen barrier properties of PVA. The coating on the packaging container is made by casting the biodegradable composition onto a substrate and drying it.

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Gas barrier film, packaging material, and package with improved barrier properties for containing food, pharmaceuticals, electronics, and other products. The gas barrier film has a specific peak ratio in the infrared absorption spectrum of the undercoat layer to improve oxygen and water vapor barrier properties. The peak ratio is obtained by adjusting the absorbance heights of specific wavenumbers in the undercoat layer infrared spectrum. This improves barrier properties without using expensive materials like polyester films. The film structure is a stretched propylene-based polymer film with an undercoat layer and inorganic layer. The undercoat layer has specific peak heights at 1490, 1600, and 1780 cm-1. The peak ratio P1/P2 is calculated from these absorbance heights. The gas barrier film with this peak ratio has improved barrier properties

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Gas barrier films, packaging materials, and packages with improved barrier properties like oxygen and water vapor barrier. The films have a specific peak ratio in the infrared spectrum of the undercoat layer between the substrate and the barrier layer. This ratio is 0.25-1.20 for the peak heights of absorption bands at 1490cm-1, 1600cm-1, 3100cm-1, and 3600cm-1. This adjustment improves barrier properties without adding layers.

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Packaging material with low variance in barrier properties to extend shelf life of packaged products without using excessive coating materials. The packaging material has a base paper with a specific weight range, and coatings with cross-linked hydroxy polymer and wax. The base paper weight is 30-90 g/m2 to balance homogeneity and barrier effect. The first coating forms an oxygen barrier with cross-linked hydroxy polymer, and the second coating forms a water vapor barrier with polymer and wax. This combination reduces variance in barrier properties compared to high-weight base paper or excessive coatings.

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Contaminant-resistant packaging and dispensing systems for perishable goods like food that have improved shelf life and can be shipped and stored in remote locations without spoilage. The packaging uses specialized conduits with contaminant barriers to prevent oxygen and moisture infiltration. The conduits have a skin layer with higher oxygen permeability surrounding a core layer with lower permeability. This skin-core structure reduces oxygen diffusion through the conduit walls. The packaging also has a container with an oxygen barrier and a lid with a seal. The conduit connects the container to the outside for dispensing the product. The contaminant-resistant packaging helps preserve the quality of perishables by significantly reducing contamination during shipping and storage.

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Resin composition for packaging applications that has improved thermal stability compared to existing compositions containing ethylene-vinyl alcohol copolymer (EVOH) and polypropylene. The composition contains EVOH and a polypropylene resin containing carbon 14. The carbon 14 polypropylene provides better thermal stability compared to conventional polypropylene resins. The composition can be used in molded articles, sheets, films, bottles, tubes, containers, and multilayer structures with improved thermal properties.

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