Graphene nanoplatelet coatings for sustainable packaging barrier and heat-sealing applications

Overview

Graphene Integrations offers graphene nanoplatelet (GNP) dispersions formulated for industrial coatings applications in the packaging sector. The technology targets ultra-thin coatings that manage water vapour and oxygen diffusion through paper and film substrates, supporting repulpability of paper and recyclability of films. Beyond barrier performance, the platform is being evaluated for dual functionality, including induction heat sealing and anti-corrosion protection, giving packaging manufacturers a single additive system that addresses multiple performance requirements.

The offering responds directly to packaging industry demand for sustainable solutions that maintain product protection while meeting recyclability targets. By incorporating GNP technology into standard coating processes, packaging producers can potentially reduce reliance on multi-layer laminates and conventional barrier films that are difficult to recycle.

Technical specifications

• Barrier performance: GNP additives reduce water vapour transmission rates and increase tortuosity in coating films, limiting the diffusion pathways for gases and moisture
• Anti-corrosion capability: Graphene nanoplatelets in liquid resin coatings have demonstrated protective benefits against corrosion in thicker film applications
• Coating format: Dispersions suitable for ultra-thin coat weights, compatible with gravure and flexographic printing methods used in industrial packaging production
• Processibility: Formulation is designed to balance graphene content and platelet orientation for effective diffusion control alongside practical application on standard packaging equipment
• Dual-function potential: Evaluation underway for graphene doping in heat-sealable adhesives to enable induction heating techniques
• Substrate compatibility: Applicable to paper coatings and film components used in packaging structures

Technology readiness level

The technology is at an advanced development stage with prior validation in thicker protective film coatings demonstrating water vapour transmission improvements, increased tortuosity, and anti-corrosion benefits. Low coat weight application capability has been demonstrated on paper substrates. Current work focuses on testing thin-film GNP coatings for water vapour transmission rates against specific packaging industry targets. Next steps include optimizing graphene loadings and types for coat weight objectives, scaling on pilot plant equipment, recyclability review, and regulatory evaluation through FDA and EPA processes prior to full product integration.