PulPac has introduced fibre-based caps developed using its Dry Molded Fiber technology, targeting the replacement of conventional plastic closures in packaging applications. The development is being carried out in collaboration with PA Consulting and Optima, as part of ongoing efforts to expand fibre-based packaging formats.
The caps are designed to replicate key functional characteristics of plastic closures, including thread engagement, sealing performance, and repeated opening and closing. According to the company, the prototypes are being engineered to deliver a “plastic-like” user experience while maintaining compatibility with existing packaging systems.
The development forms part of the Bottle Collective initiative, which focuses on advancing fibre-based alternatives for rigid packaging components. The closures are intended to support mono-material packaging structures, potentially improving recyclability compared to conventional multi-material systems.
PulPac indicated that early-stage testing has been conducted to assess mechanical strength, sealing integrity, and usability. Further validation and industrialisation efforts are ongoing, particularly in adapting the caps for high-speed filling and capping lines.
The company plans to present the fibre-based caps at interpack 2026, where the technology will be showcased alongside other developments in fibre-based packaging.
The initiative reflects broader industry efforts to reduce reliance on fossil-based plastics in closures, which are widely used across beverage, food, and personal care packaging. Fibre-based alternatives remain in the development phase, with scalability, performance consistency, and compatibility with existing infrastructure identified as key areas for further progress.