Recyclable biofibre-based closures for paper beverage bottles

Overview

This research initiative develops recyclable, biofibre-based closures designed specifically for paper beverage bottles. The goal is to replace conventional plastic caps with a sustainable alternative built from natural fibres combined with recyclable polymers such as starch, PLA, HDPE, and blended polymer systems. By targeting the closure — historically one of the most difficult components to make recyclable in fibre-based beverage packaging — the work supports brand owners and packaging converters pursuing fully recyclable, plastic-reduced packaging portfolios.

Technical specifications

Key features:

• Natural fibre reinforcement blended with recyclable polymers including starch, PLA, HDPE, and custom blended systems
• Processing pathway based on compounding, blending, and injection moulding suitable for standard cap manufacturing equipment
• Leverages established expertise in packaging polymers, films loaded with natural and synthetic functional materials, and food-contact-grade polymer formulation
• Designed to meet the mechanical, sealing, and barrier requirements of beverage bottle closures

Technology readiness level

The project is at an early-to-mid research and development stage. Future validation activities include identifying the optimal polymer system, blending the polymer with biofibre in a suitable mixing system, injection moulding of prototype closures, and structured testing and validation. The research team has access to the full instrumentation required to carry out these activities in-house.