Bio-Based Adhesives for F&B Packaging

Food packaging adhesive comprising a bio-based polyester polyol and its preparation method and application technical field. The adhesive contains a bio-based polyester polyol, a chain extender, a modified inorganic nano-oxide, and a catalyst. The bio-based polyester polyol is prepared through esterification of a polyol and a bio-based polyacid under nitrogen protection and in the presence of a strongly acidic cation exchange resin. The modified inorganic nano-oxide includes acryl-modified inorganic nano-oxide and coupling agent-modified inorganic nano-oxide, with a specific mass ratio of 0.8-1.2.

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Bio-based two-component polyurethane adhesive for industrial applications, comprising renewable castor oil and soybean oil polyols, synergized with tannic acid and lignin, and degradable materials. The adhesive achieves enhanced environmental performance through its unique blend of renewable raw materials, degradable components, and titanium dioxide nanoparticles, while maintaining superior bonding strength and durability.

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Bio-based polyurethane adhesive that combines excellent bonding properties with environmental sustainability. The adhesive is prepared by combining bio-based polyol, activated lignin, catalyst, leveling agent, stabilizer, and antioxidant. The bio-based polyol reacts with isocyanate to form a high-performance polyurethane, while the activated lignin enhances the adhesive's bonding strength and durability. The process eliminates traditional waste generation, chemical recovery methods, and landfill disposal issues associated with conventional polyurethane adhesives.

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Biodegradable label paper adhesive that can replace traditional non-biodegradable adhesives used in labeling products. The biodegradable adhesive is made from degradable polyester polyol, chain extender, accelerator, and antioxidant. The biodegradable adhesive is synthesized by heating the polyester polyol, adding the other components, and then cooling and discharging the adhesive. The biodegradable adhesive can be used in label paper substrates to provide adhesive properties while degrading naturally in the environment, reducing pollution and waste compared to traditional adhesives.

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Polyurethane adhesive for flexible packaging with improved hydrothermal resistance. The adhesive is prepared by a two-step process involving a bio-based polyol synthesis from soybean oil and rosin, followed by a polyurethane polymerization reaction. This bio-based adhesive formulation replaces traditional petroleum-based polyurethane adhesives, offering enhanced hydrothermal stability and reduced environmental impact.

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Packaged products like bags, tubes, lids, and labels with biomass-derived components in the adhesive and printing layers. The adhesive contains a cured product of biomass-derived polyol and isocyanate. The printing ink also has biomass-derived polyol and isocyanate. This increases the biomass content of the packaging materials beyond just the base layer, sealant, and substrate. The biomass-derived components are from sources like neopentyl glycol, ethylene glycol, succinic acid, and lactic acid. It allows higher biomass content in the entire packaging structure for products that don't require heat sterilization.

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Packaging material with increased biomass content for reduced fossil fuel usage. The packaging material contains layers like substrate, printed, adhesive, and sealant. The adhesive layer has a biomass-derived polyester polyol from alcohol and carboxylic acid, and cured with biomass-derived isocyanate. The printed layer may also have biomass-derived polyols and isocyanates. The packaging material aims to replace fossil-based adhesives and inks with biomass-derived alternatives to boost biomass content.

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Adhesive composition and adhesive sheet that provides improved adhesion properties even with high biomass content in polyol-based adhesives. The composition contains a hydroxyl-containing urethane prepolymer with a specific molecular weight dispersion and a polyisocyanate hardener. The prepolymer, which contains a specific biomass-derived polyol with an aliphatic dimer structure, enhances the adhesive's fluidity and wettability while maintaining its mechanical strength. The composition is formulated into an adhesive sheet with enhanced adhesion properties, particularly in applications where high biomass content is present.

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Packaging material with a high biomass content for reducing environmental impact compared to conventional materials. The packaging has layers like base, printing, adhesive, intermediate, and sealant. The printing layer contains biomass-derived components like polyols and isocyanates. The biomass polyols can be polyester derived from biomass ethylene glycol and fossil fuel dicarboxylic acid. The biomass isocyanates can be derived from biomass-based diamines. Using biomass-derived printing components reduces fossil fuel content compared to conventional printing layers.

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Packaging material with high biomass content for reducing fossil fuel usage. The packaging has a base layer, printing layer, adhesive layer, and sealant layer. The adhesive and printing layers contain biomass-derived components like biomass-derived polyols, carboxylic acids, and isocyanates. This allows increasing the biomass content of the entire packaging material beyond just the base layer. The biomass-derived components in the adhesive and printing layers provide adhesion and printing properties. The base layer can have biomass-derived polymers like biomass-derived polyester. The sealant layer can contain biomass-derived polyolefins. The biomass-derived components in the packaging material reduce the reliance on fossil fuels.

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Laminated film made of three layers for food packaging that has improved properties like heat sealability, impact resistance, and bag breakage resistance compared to traditional films. The film has a surface layer, an intermediate layer, and a seal layer. The intermediate layer contains biomass-derived polyethylene with a melt flow rate of at least 1.5 g/10min. This allows using more plant-derived resin in the film structure without sacrificing performance. The biomass polyethylene in the middle layer provides properties like impact resistance, while the propylene resin layers on the outside improve sealability.

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A two-component laminate adhesive comprising a biomass-based polyester polyol as the main agent and an organic diisocyanate compound as the curing agent. The adhesive is formed through a process where the main agent and curing agent are mixed and reacted to form an adhesive layer, which is cured to form a polyurethane resin exhibiting adhesion properties. The adhesive is suitable for flexible packaging applications and offers enhanced environmental benefits through the incorporation of biomass-derived components.

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Packaging material and pouch that reduces environmental impact and has a metallic tone. The packaging material is made by laminating films with printing, metal deposition, and sealant layers. The adhesive layers between the films contain biomass-derived low-density polyethylene. The metal deposition layer can be adjacent to the biomass adhesive layer. This increases the biomass content of the packaging. The sealant layer contains regular polyethylene. The biomass adhesive reduces the overall fossil fuel content compared to conventional adhesives. The biomass-derived materials can be polyester, low-density polyethylene, and polyols for the printing binder.

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Laminate, packaging material, packaging bag and stand pouch with improved recyclability and performance. The laminate has a base material made of biomass-derived stretched polyethylene and a heat seal layer also made of biomass-derived polyethylene. Adding an adhesive layer between the base and other layers like thin films and intermediate layers further improves adhesion. This allows producing recyclable packaging with good strength, heat resistance and sealing properties using biomass-derived polyethylene throughout.

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Laminate structure for hand-cut open packaging that balances properties like blocking resistance, hand-cutting ease, and drop impact resistance when using biodegradable plant-derived polyethylene. The laminate has specific ratios of linear low-density polyethylene (LLDPE) and plant-derived low-density polyethylene (LDPE) in the sealant layer. The ratios are 3:7 or 7:3 for LLDPE:LDPE. This provides good hand-cutting and resistance compared to using pure plant-derived polyethylene. The laminate layers are base material, adhesive, barrier, and sealant. The sealant is LLDPE/LDPE. The barrier is adjacent to the sealant.

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Lamination film for food packaging bags that uses vegetable-derived resins to improve environmental sustainability. The film has three layers: a surface coat, a middle layer, and a sealing layer. The middle layer contains bio-polyethylene derived from vegetable sources. This allows using vegetable-based resins in the middle layer without sacrificing film properties like transparency, sealability, and toughness. The surface and sealing layers contain propylene resins.

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Lamination film for food packaging bags that uses vegetable-based resins while maintaining good properties like moldability, heat sealability, and tear resistance. The film has three layers: a surface coat, middle layer, and sealing layer. The middle layer contains bio-low density polyethylene derived from vegetable sources. This allows using vegetable-based resins in the other layers as well. It balances the properties of the vegetable-based resins to produce a lamination film suitable for food packaging bags.

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Packaging material with increased biomass content for products like bags, tubes, and labels. The packaging material contains layers like base, printing, adhesive, and sealant. The adhesive layer is made with a polyol that can contain biomass-derived components. The printing layer can also have biomass-derived polyols. The base layer can have biomass-derived polyesters or biomass-derived sealant layer with biomass-derived polyolefins. This allows increasing the overall biomass content of the packaging material.

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Lamination film for food packaging bags that uses vegetable-origin resins in the middle layer to provide good sealing and tear resistance while maintaining biodegradability. The film has a surface coat, middle layer, and sealant layers. The middle layer contains propylene resin with biomass polyethylene (vegetable-origin) having a melt flow rate of 1.5 g/10min or higher. This allows the film to have suitable sealing, tear resistance, and blowout seal in wide temperature ranges compared to pure fossil fuel resins. The film can be used in food packaging bags with vegetable-origin resin content in the middle layer.

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Biomass polyurethane adhesive derived from renewable resources, enabling sustainable packaging solutions. The adhesive is prepared through a simple process using pure biomass raw materials, such as agricultural waste, which replaces traditional fossil-based polyurethane precursors. The adhesive exhibits excellent performance, hygiene, and safety characteristics while significantly reducing dependence on fossil resources and energy consumption.

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