Environmentally friendly dry mechanical separation technology for recycling polymer-coated paper waste

Overview

Polymer-containing paper waste, including polymer-coated wallpaper and used TetraPak packaging, presents a significant recycling challenge. These paper-polymer composites combine natural cellulose with synthetic polymers, and the high polymer content makes incineration problematic due to the release of harmful chemicals such as dioxins. Conventional chemical recycling methods are costly and environmentally unfriendly.

This solution offers a dry mechanical separation technology designed to fully process 100% of polymer-containing paper waste while separating 90-95% of polymers from the cellulose base. By avoiding chemical treatments, the process is both environmentally friendly and cost-effective, conserving natural resources and creating new reuse options for both separated cellulose and recovered polymers.

Technical specifications

Key features:

• Dry mechanical separation process requiring no chemical treatments
• Designed to handle paper-based polymer composites including polymer-coated wallpaper and TetraPak-style packaging
• Targets 90-95% separation efficiency of polymers from cellulose paper base
• Achieves 100% recycling of both separated cellulose and recovered polymers
• Pilot-scale equipment design includes a custom mill and separator for processing waste paper-polymer composites
• Enables reuse of separated cellulose in paper production and recovered polymers in new polymer compositions

Research background:

The technology builds on prior research into the physicochemical properties of cellulose fibers obtained from wallpaper waste processing, properties and applications of PVC-coated paper waste, and the characteristics of PVC polymer compositions incorporating cellulose-containing polymer waste.

Technology readiness level

The technology is currently at the laboratory-to-pilot development stage. Initial validation has been supported by published research on cellulose fiber properties from wallpaper waste and PVC-coated paper waste recycling. Planned next steps include conducting laboratory physical-chemical analyses of separated cellulose and polymers, designing and fabricating pilot-scale mill and separator equipment, and investigating the impact of multiple recycling cycles on material recyclability. The technology requires delivery of waste paper samples and equipment drawings from the partner institution to advance toward pilot validation.