Lignin represents the second most common biopolymer found in nature, next to cellulose, making up about 20% of all organic matter. Inside plants, lignin acts as a natural binding element of the cell walls. It accounts for about 1/3 of a tree’s material.

Lignin is a usual byproduct in paper industry, it ends either in landfills, or burned for energy. Reusing this mass contributes to circular economy. 

 

Polymer blends from lignin are strong and durable. Due to its versatility, lignin can become a bioplastic material, like PLA; a foamed material like PU-foam, EXP, EPS; 3D printing filament; a fibre for textiles; a carbon fiber alternative, or an adhesive. In all these materials, lignin serves as the natural substitute for fossil-based ingredients or products.

lignin, itself, is barely degradable in composting settings, however, it can be added to biodegradable polymers to improve their mechanical and gas barrier qualities, which are two of the primary shortcomings of biodegradable polymers. It also acts as antioxidant, and has UV characteristics.