European regulators have set a 70% recyclability target for packaging by 2030, increasing to 80% by 2038, prompting German firms to develop adhesive‑free sealing methods.

Paper and cardboard are widely recycled in Europe, but adhesives, seals and coatings can hinder the recycling process, causing machinery damage and lower-quality recycled material, according to researchers at NC State University.

In August, the EU’s Packaging and Packaging Waste Regulation entered into force, requiring all packaging to be at least 70% recyclable, with stricter reporting and licensing requirements in Germany.

Researchers from Fraunhofer, Hermann Ultraschall and Henkel have created laser‑based and ultrasonic sealing technologies that eliminate the need for adhesives.

Fraunhofer’s PAPURE project, launched in 2023, uses a laser heating process to seal paper packaging without foreign materials and aims to bring a market‑ready solution within two years after the project ends in September.

The technology can be integrated into existing machinery with a laser module, though manufacturers may need to redesign equipment, which presents cost and time challenges.

Ultrasonic sealing, described as a welding‑like process, is being discussed with major industry players for large‑scale production, but it currently operates at slower speeds than conventional adhesive methods.

Henkel’s cold‑seal solution, introduced in February, enables barrier‑coated paper to bond under pressure without heat, making it suitable for food‑grade packaging such as snack and confectionery items.

Industry experts note that while the new sealing methods can improve recyclability, broader sustainability gains depend on advances in paper quality, collection practices and compatibility with existing production lines.

Experts also point out that paper waste often fails to be recycled due to contamination and poor sorting rather than adhesive issues.