Biodegradable PHA spray coating for molded fiber food packaging

Overview

The biodegradable PHA spray coating solution revolutionizes molded fiber food packaging by integrating a high-performance, sustainable coating technology. Developed through collaboration with Kemira and Danimer Scientific, this solution employs a polyhydroxyalkanoate (PHA) biopolymer, which is fully biodegradable and food-contact compliant. The application features a novel double-layer system with an inner microfibrillated cellulose (MFC) layer that reduces porosity and absorbency, enhancing the coating's effectiveness and supporting fiber recyclability. The AutoJet® 1550+ spray system is used for precise and efficient coating application, making the technology scalable and industrially viable.

Technical specifications

• Biodegradable PHA Coating: Derived from Danimer Scientific's biopolymer technology, ensuring food-contact compliance and sustainability.
• Double-Layer Structure: Incorporates a microfibrillated cellulose (MFC) inner layer to minimize coating absorption and enhance barrier properties.
• Application Technology: Utilizes the AutoJet® 1550+ spray system from Spraying Systems Co. for precise deposition.
• Performance Metrics: Focuses on reduced water vapor transmission rate (WVTR) and oxygen transmission rate (OTR), with improved mechanical strength and water resistance.
• Recyclability: Supports fiber recyclability and repulpability, meeting industry standards.

Technology readiness level

This technology is at Technology Readiness Level (TRL) 9, indicating that it is fully developed and ready for commercial deployment. The formulation is finalized, with ongoing efforts to optimize tooling and application processes for specific product geometries, such as 300 mL molded pulp paper bottles, ensuring functional and production efficiency.