UPM, Michelman and BOBST have announced a collaboration around bio-based barrier paper packaging. The move shows how paper packaging is expanding beyond board and cartons into functions that were often handled by plastic coatings or film-based structures.

For food packaging teams, the important question is not whether the material sounds sustainable. It is whether the coating structure, converting process, sealing performance and recycling evidence are suitable for the application.

Barrier paper is about coating and converting

Inspecting barrier paper coating on a converting line

Barrier paper needs to perform several jobs:

  • moisture resistance;
  • grease resistance;
  • oxygen or aroma protection;
  • sealing or adhesive compatibility;
  • crease durability;
  • print and converting stability.

These properties are not determined by base paper alone. Base paper, coating, primer, printing and finishing need to work together. That is why cooperation between material suppliers, coating specialists and equipment manufacturers matters.

Questions before replacing PE-coated paper

A packaging supplier considering a shift away from PE coating should clarify:

  1. which function is being replaced: water, grease, oxygen or sealability;
  2. whether the current equipment can run the new material;
  3. whether food-contact and migration evidence is available;
  4. which market’s recyclability criteria will be used;
  5. whether the buyer can justify the cost difference.

Testing water resistance of barrier paper samples

Barrier paper will not replace every plastic-coated structure immediately. It is more realistic in dry food, light grease-resistance applications, some secondary packaging and cases where the performance requirement is clear.

Recycling claims need caution

Because the material is paper-based, marketing teams may want to emphasize recyclability. But coating weight, repulpability, residue and local recycling infrastructure can change the answer. Export packaging teams should separate domestic claims from EU, UK or North American requirements.

A safer proposal says that recycling suitability must be checked against the target market and application. The opportunity is real, but the winning supplier will be the one that explains both barrier performance and recycling evidence with data.

About the Author

PackingMaster: Editor of Paper Pack Log. We track paper packaging market trends, product information and technical insights for packaging professionals.

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