The Glue That’s Holding Recycling Back

The quest for a circular economy has led to a focus on seemingly minor innovations, but one area holds major promise: finding alternatives to glue and labels on paper packaging. Environmentalists and industry experts have long recognized the issue, but recent breakthroughs in technology may offer a solution.

The problem with labels and adhesives is not just aesthetic; they can damage recycling machinery and render entire batches of recycled paper unusable. This is particularly concerning given Europe’s already impressive paper recycling rates: 74% of paper and board consumed in 2024 was recycled. European authorities have set ambitious targets, requiring at least 70% of packaging to be recyclable by 2030, rising to 80% from 2038.

Germany has been a leader in this field, with researchers at Fraunhofer developing a laser-based heating process that seals paper packaging without adhesives. This technology, known as PAPURE, has shown promise and is expected to be taken to market soon.

Another approach being explored is ultrasonic paper sealing technology from engineering firm Hermann Ultraschall. High-frequency sound waves are used to bond paper, similar to welding metal. The company claims this technology can be easily integrated into existing production lines and has already attracted significant interest from major players in the industry.

However, there are challenges ahead for these new technologies. Updating or replacing existing machinery can be costly and time-consuming. Additionally, the production rate using these methods is currently slower than traditional adhesive-based processes, although researchers believe this can be improved through automation.

Some types of paper do not work with the new technologies, leading to discussions between manufacturers and paper producers about developing raw materials that are easier to bond. Henkel’s cold seal solution for barrier-coated paper addresses this issue and has opened up new possibilities for sustainable packaging in the food-grade sector.

Henkel’s innovation is particularly noteworthy as it develops a solution that can bond against itself, addressing the need for special coatings to protect contents from moisture or other contaminants. This breakthrough has significant implications for sustainable packaging in the food industry.

As companies scramble to meet regulatory requirements and improve their environmental credentials, we are likely to see a shift towards more sustainable packaging solutions. However, it’s also clear that there is still much work to be done to overcome the technical challenges facing these new technologies.

Finding alternatives to glue and labels on paper packaging will require collaboration between manufacturers, researchers, and policymakers. It’s a complex challenge, but one that holds great promise for a more circular economy in the future.

The development of sustainable packaging solutions has far-reaching implications beyond just environmental benefits. By reducing waste and improving recyclability, companies can also reduce their costs and improve their brand reputation. This is particularly important as consumers increasingly prioritize sustainability when making purchasing decisions.

As we move forward with these new technologies, it’s essential that we address the challenges ahead. Investing in research and development, supporting industry partners to overcome technical hurdles, and engaging policymakers to create a supportive regulatory environment are crucial steps towards creating a more sustainable future for our planet.

Ultimately, finding alternatives to glue and labels on paper packaging is not just about solving a minor problem – it’s about creating a more sustainable future for our planet. By working together, we can make significant progress towards this goal and ensure that the next generation inherits a cleaner, healthier world.