Hybrid bio-polymer material for biodegradable food packaging skin layers

Overview

This solution offers a hybrid bio-polymer material composed of corn starch, plant protein, and polylactic acid (PLA) intended for use as a biodegradable skin layer in food packaging applications. The material addresses key limitations of existing bio-based polymers, such as poor mechanical performance and weak film-forming behavior, by leveraging a proprietary high-pressure steam injection hybridization process combined with thermal extrusion.

The resulting material is designed to deliver adequate mechanical strength, low density permeation characteristics, and printability, making it suitable for flexible packaging applications. It also targets compliance with international biodegradability standards (EN or ASTM).

Technical specifications

Key features:

• Composition: Hybrid blend of corn starch, plant protein, and PLA
• Processing: High-pressure steam injection to promote molecular entanglement, followed by extrusion into pellets, filaments, or films
• Characterization: Molecular interactions analyzed via FTIR to modulate inter- and intramolecular bonding
• Form factors: Extrudable pellets, straws, filaments, and flexible skin layers suitable for rolling or lamination
• Performance targets: Enhanced mechanical properties, improved barrier performance against moisture, and biodegradability compliance with EN or ASTM standards
• Compatibility: Designed for co-extrusion with commercial core resins to produce multilayer packaging structures

Technology readiness level

The technology is currently at an early-to-mid stage of development. The research group has demonstrated proof-of-concept in producing extruded pellets and filaments from plant-based ingredients with and without PLA, achieving sound mechanical properties. A defined validation plan is in place, requiring optimization of component proportions, steam injection processing, co-extrusion trials with partner resins, and performance testing with high-moisture food products. The full validation cycle is expected to take approximately eight months. The team is actively seeking an industry partner for co-development and funding for equipment and key personnel to advance the technology toward commercial readiness.