PULPAC has announced it is continuing to expand the possibilities of fibre-based packaging, with a new generation of caps currently under development.
The caps will be presented publicly for the first time at interpack 2026, demonstrating how fibre can move into one of the most widely used and technically demanding components in packaging.
Building on years of experience in dry moulded fibre, PulPac explained that the new caps are designed to meet the functional and consumer expectations typically associated with plastic alternatives, while moving toward a fibre-based solution.
Early tests indicate ‘promising’ performance across several key parameters, including thread engagement, opening and closing functionality, sealing architectures, and overall tactile experience. The caps are also said to enable a high level of design flexibility, including the ability to differentiate the inside and outside of the cap.
The project is being carried out together with PA Consulting and in close dialogue with industry stakeholders including PulPac’s designated machine partner for this segment, Optima. It also builds on ongoing work within the Bottle Collective initiative, where complete fibre-based bottle systems, including closures, are being explored and evaluated as integrated solutions.
Early versions of the caps have been produced and tested in real-life environments as part of ongoing bottle and packaging evaluations.
“At PulPac, we focus on creating value both in what can be realised today and what comes next in packaging. Advancing fibre-based caps is a natural step in that journey,” said Charlotte Walldal, chief technology officer. “When we show the cap to customers, the reaction says a lot. The first response is often disbelief that they’re made from fibre. The look, the sound when you tap it against a tabletop, and especially the tactile feel challenge expectations of what fibre can be. It’s unexpected and something you need to experience firsthand to fully understand.”
