Organic green chemistry heat seal coating solution for paper packaging
A bio-based fatty acid biopolymer with pendant amine groups that functions as a high-performance heat seal adhesive for sustainable paper packaging. The material bonds aluminum foil to paperboard at strengths exceeding 12N/15mm, supports multiple coating methods, and offers a compostable alternative to conventional adhesives in food packaging applications.
Overview
This solution introduces a low molecular weight cross-linked fatty acid biopolymer featuring pendant amine groups, designed to serve as a heat sealable adhesive for paper-based packaging. Developed by BioPaxium Technologies, the biopolymer addresses the growing demand for sustainable packaging alternatives by replacing petroleum-based adhesives with a renewable, compostable material. The technology has been validated at the laboratory scale, demonstrating bond strengths on aluminum and paper substrates that meet or exceed industry requirements. Its versatility allows application via extrusion, spraying, knife coating, roll coating, and gravure coating, making it adaptable to diverse manufacturing environments.
Technical specifications
Key features:
- Bio-based composition derived from fatty acids with pendant amine groups, amide bonds, and ester bonds along a lengthy hydrophobic tail
- Bond strength equal to or exceeding 12N/15mm on aluminum foil and paperboard substrates following heat treatment
- Melt flow behavior at temperatures of 120 degrees Celsius or higher, enabling hot melt adhesive applications
- Multiple application formats including solid-state extrusion and an 8% solid slightly gel solution in isopropanol for spray, knife, roll, and gravure coating
- Bonding mechanism combining covalent cross-linking through amine groups with synergistic hydrogen bonds and electrostatic interactions for superior adhesive strength
- Compatibility with aluminum foil, paperboard, and other substrates commonly used in food packaging
Technology readiness level
The biopolymer has been successfully validated at the research level through laboratory bonding of aluminum foil to paperboard. The next phase involves evaluating adhesive performance using client-specific samples, scaling polymer production to 100 kilograms at pilot scale, and generating additional bond strength data using Instron testing equipment. This comprehensive validation study is anticipated to take approximately six months. BioPaxium Technologies is actively seeking partnerships to facilitate progression to pilot-scale production and broader commercial validation.
About BioPaxium Technologies Limited
BioPaxium Technologies specializes in advanced moulded fibre technology designed as a sustainable alternative to single-use plastics in the food packaging industry. The company utilizes a proprietary process involving pulp fibres—such as bamboo, sugar cane bagasse, and wheat straw—combined with unique biopolymer formulations. This technology allows for the creation of intricate, durable packaging geometries capable of withstanding high temperatures in conventional and microwave ovens, making them suitable for ready-meal trays, bowls, and cups. By incorporating bio-coatings and high-barrier compostable films, the company enhances food shelf life while ensuring the final products remain compostable and recyclable.
These innovations address critical environmental concerns by replacing non-recyclable black plastics and Styrofoam in the food service and manufacturing sectors. Through strategic partnerships, such as licensing its intellectual property to Transcend Packaging and collaborating with firms like Evanesce, BioPaxium aims to scale the adoption of sustainable packaging across Europe and beyond. Its focus on research and development enables the company to provide performance-oriented solutions that meet the rigorous standards of major food and beverage manufacturers while helping brands achieve their corporate sustainability goals.
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