![Multilayer pouch](https://resource-recycling.com/plastics/wp-content/uploads/sites/4/2018/03/Pouch_Ploylada_020916_shutter-web.jpg)
Researchers looked into multi-layer pouch recycling through the use of enzymes. | Ploylada/Shutterstock
A paper authored by a Spanish plastics research institute says enzymes can be used to degrade adhesive layers in multi-layer scrap materials, allowing the plastics to be separated for recycling.