Commonly, when discussing sustainable packaging, people often focus on the base material. However, proper recycling does not solely depend on the packaging matrix. Coatings and adhesives also play an important role. Contaminating recycled material with adhesive or coating residues will result in low-quality products. In addition to the slowing down of the recycling process, clogging of water systems and damage to machinery.
The development of sustainable packaging faces two major challenges. Maintaining the quality and standards of each product while not neglecting environmental responsibility. Reducing landfill waste, minimizing climate impact, and decreasing reliance on scarce resources is important.
Adhesives are used to seal packaging and ensure that the contents reach the user safely and hygienically. On the other hand, coatings enhance the aesthetics of packaging and provide a protective barrier against moisture, oxygen, oil, and grease.
As mentioned earlier, coatings and adhesives play an important role in the packaging industry. Therefore, companies should create strategies for their development based on four principles:
Henkel Adhesive Technologies developed the Technomelt Supra Eco hotmelt adhesive for a wide range of packaging. This product is made of 81% of bio-based material and reduces CO2 emissions. It is also compatible with recycling according to the guidelines of the European Paper Recycling Council (EPRC).
Ingredion is a leading global company that produces and markets ingredient solutions for various industries. In 2021, it launched FILMKOTER 2030, a cornstarch-based protective barrier that is fluorochemical-free for food packaging. With this coating, they aim to replace the use of PFAs with effective and sustainable plant-based solutions. Furthermore, FILMKOTER 2030 exhibits Oil and Grease Resistance (OGR).
Overall, innovating in bio-based materials for the development of coatings and adhesives is relevant for the redesign of packaging. Additionally, ensuring the quality of packaging in every industry, as well as proper recycling, requires the four principles (Recycle, Renew, Rethink, and Redesign).
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