IN Brief:
- The F3 project has demonstrated fully cellulose-based films and coatings at pilot scale.
- The materials target transparent barrier films, recyclable fibre-based coatings, and food packaging applications.
- Further development will focus on humid-condition barrier performance and multifunctional packaging systems.
VTT Technical Research Centre of Finland and LUT University have advanced fully cellulose-based film and coating materials designed to reduce or replace fossil-based plastics in food packaging while retaining the functional demands of modern converting and shelf-life protection.
The work has been carried out through the F3 — Films for Future bio-based materials project, which brought together VTT, LUT University, and 34 industrial partners with funding from the European Regional Development Fund. The platform enables cellulose to be processed as a polymer rather than only as a fibre, creating transparent films with mechanical and barrier properties positioned against conventional plastic materials.
Packaging producers are under increasing pressure to reduce plastic content, improve recyclability, and provide clearer evidence of lifecycle performance. Emerging thresholds around fibre-based materials, including plastic content below 5 wt%, are becoming increasingly relevant as packaging moves under the EU Packaging and Packaging Waste Regulation and related national implementation regimes.
The F3 materials are split across two main application routes. The films are designed as transparent, standalone packaging materials with inherent biodegradability, while the coatings are aimed at paper and board applications where barrier performance must be delivered without undermining recyclability in fibre-based systems. Across both routes, the basic packaging function remains unchanged: food must be protected, shelf life must be maintained, and the material must run through production without creating avoidable process waste.
Processing compatibility gives the project much of its industrial weight. The cellulose films and coatings have been demonstrated in package converting processes, including conventional thermoforming, which brings the platform closer to production infrastructure already used by converters and food manufacturers. Sustainable materials often fail at this point, not through lack of ambition, but because forming behaviour, sealing conditions, stiffness, storage stability, or line speeds expose weaknesses that bench-scale material tests do not show.
The reported barrier figures bring the development into a more practical food packaging context. The films provide oxygen barrier performance with oxygen transmission rate below 1 cc/m²/day at 23°C and 50% relative humidity. The coatings provide oxygen barrier performance below 0.2 cc/m²/day and grease barrier functionality at KIT 12 in recyclable fibre-based systems. Those figures place the platform within reach of dry foods, bakery products, and fibre packs requiring transparent barrier layers.
Moisture resistance remains one of the decisive technical tests for cellulose-derived packaging, and further work will focus on barrier performance under humid conditions. Many fibre-based and bio-based systems perform strongly in dry testing but become more difficult when exposed to chilled distribution, greasy products, variable storage, or moisture-rich environments. Food packaging materials also need to withstand filling, sealing, stacking, transport, retail display, and consumer handling before any sustainability benefit becomes commercially useful.
The project also points toward more advanced packaging functions. The material platform could support antimicrobial or antioxidant properties, as well as environmentally responsive packaging capable of reacting to humidity, gas composition, or pH. Commercial adoption will still depend on cost, food-contact approval, verification, and compatibility with recycling streams, but those functions show how cellulose-based materials may move beyond simple plastic substitution.
The development sits alongside the wider movement toward natural polymer and plastic-free barrier systems, including Xampla’s plastic-free coating work, where material performance is being judged against policy, recovery, and food-contact requirements rather than environmental intention alone. Packaging producers need alternatives that can be coated, formed, sealed, printed, filled, and recovered without turning every new format into a bespoke engineering project.
For food manufacturers, plastic reduction is increasingly a procurement and compliance discipline rather than a branding exercise. Cellulose has the advantage of being abundant, renewable, and familiar to paper and board recovery systems, but it has historically struggled to match plastic-like performance without cost or processing trade-offs. The F3 work moves the discussion toward process evidence, with pilot-scale feasibility, thermoforming compatibility, and defined oxygen and grease barrier performance giving converters and food producers more to evaluate than a laboratory concept.
The next stage will be proof of repeatability, scale economics, and pack performance across real food categories. If cellulose-based films and coatings can hold barrier performance under more demanding humidity and product conditions, the technology could become a practical route for manufacturers trying to reduce fossil-based plastic without compromising shelf life, line efficiency, or material recovery.
