Biodegradable low-voc moisture-remediating coating for food packaging

Overview

This solution is a biodegradable, low-VOC coating designed to remediate moisture in food contact packaging. It is built on a proven energy-curable resin platform in which GRAS (Generally Recognized as Safe) functional components are embedded directly into the coating matrix. The approach combines tortuosity, humectants, and water activity poising agents to control moisture migration, while biodegradable additives such as PLA scrap, amylose, and cellulose enable the cured film to break down into a fine powder at end of life. The coating is formulated for use on PLA and other packaging substrates selected by the customer and is compatible with FDA food-contact approved resins.

Technical specifications

• Energy-curable platform: Applied via UV or electron-beam curing, enabling fast, solvent-free processing with low VOC emissions.
• Moisture remediation: Combines three complementary mechanisms—added tortuosity to slow vapor transmission, humectants to buffer humidity, and water activity poising agents to stabilize moisture levels inside the package.
• Biodegradable components: Incorporates GRAS materials such as PLA scrap, amylose, and cellulose to promote rapid biodegradation of the cured film.
• Food contact compliance: Formulated with FDA food-contact approved resin (FCN 772) for direct food contact applications.
• Processing compatibility: Designed for application at line speeds typical of commercial food contact coatings using off-the-shelf coating equipment.
• Prior validated functionality: The underlying technique has previously demonstrated oxygen scavenging, lactose removal from milk, self-sterilizing dispensing surfaces, antimicrobial food contact surfaces, pathogen detection, and shelf-life tracking across varying humidity and temperature conditions.

Technology readiness level

The underlying energy-curable coating platform has been validated at benchtop and commercial scale, with printed and e-beam cured coatings already produced and tested for a range of food packaging functions. The current program extends this platform by incorporating moisture-remediating functionalities into an FDA food-contact approved resin and proof-coating it onto PLA or customer-selected substrates. Planned validation includes moisture permeability testing per ASTM E96 (or customer-preferred methods) and biodegradation testing per ASTM D6400, ASTM D5988-03, or ISO 17556:2019 (or customer-preferred methods), followed by printing trials and performance evaluation.