Paranova scales fibre grape punnets to one million units

Scaling fibre packaging for fresh produce

The fresh produce packaging sector in 2026 is notoriously unforgiving. Margins are razor-thin, and packing lines operate at blistering speeds. When a fibre-based alternative claims it can replace conventional plastic formats, the immediate question from any seasoned packer is about machinability. Paranova’s latest milestone with AMFresh provides a compelling answer to that exact operational challenge.

The two companies are scaling the FibreFresh HeatSeal punnet to nearly one million units for the launch of AMFresh’s Boombites grape variety. This volume is critical; it moves the needle from a boutique, limited-edition trial to a robust commercial reality.

Operational continuity and machinery integration

What makes this development particularly significant for the corrugated and converting industry is the intense focus on operational continuity. The punnets are engineered to integrate directly into existing automated packing lines. For fresh produce suppliers, adopting paper-based packaging often comes with the hidden cost of expensive line modifications or slower throughput. By ensuring drop-in compatibility, Paranova is removing the primary friction point for adoption.

This scale-up is not an isolated event but the result of serious capital deployment. Paranova recently injected £500,000 into specialized Boix punnet-forming technology. This targeted machinery upgrade is part of a much broader £20 million commitment to expand its overall fibre packaging capacity at its Cambridgeshire operations. This level of infrastructure investment signals a clear anticipation of sustained, high-volume demand for heat-sealed paper formats across the European retail landscape.

Technical complexities of grape packaging

Technically, moving from tomatoes—where Paranova previously tested the waters with Flavourfresh—to grapes introduces new complexities. Grapes are highly sensitive to moisture loss, condensation, and fungal decay. The FibreFresh punnets incorporate specialist respiration and transpiration management. Managing the microclimate within a fibre structure, especially when heat-sealed with a top film or paper lid, requires precise material engineering to prevent the board from degrading while keeping the fruit crisp.

Michael Conway, Chief Commercial Officer at Paranova, noted that reaching the one million mark for the Boombites launch demonstrates the format's adaptability. It proves that fibre can be successfully adapted for new, demanding produce categories while delivering the quality, structural integrity, and shelf appeal expected by both major retailers and consumers.

The transition from nested trays to heat-sealed punnets represents a technical leap for the paper industry. Heat-sealing requires a perfectly flat flange and consistent board rigidity to ensure a hermetic seal, something that is inherently more difficult to achieve with formed paper than with thermoformed PET. Paranova's ability to deliver this at a one-million-unit scale indicates that the manufacturing tolerances of fibre-based punnets have matured significantly.

The true test of sustainable packaging is not merely its recyclability, but its ability to run flawlessly on legacy equipment at commercial speeds, and Paranova is proving that fibre can meet this rigorous industrial threshold. Does the successful scaling of heat-sealed paper punnets mean the bottleneck for plastic replacement will now shift from technical performance to the sheer availability of specialized barrier papers? Follow The Paper for daily news, market signals and key updates from the global paper, corrugated and packaging industry. — Sigue toda la actualidad del sector en www.thepaper.ai