Biopolymers are polymers produced from natural bio-based materials (consisting of renewable carbon) such as cellulose, starch, protein and DNA. Most biopolymers are biodegradable, but this is not a necessary condition. 

The biopolymer market is growing rapidly and attracting much interest, however, there are still some questions and concerns about performance and processability of biopolymers. In particular PLA, exhibits friction/adhesion which then causes problems during processing.