Just as with 'normal' plastics these bio-plastics also consist of countless chains of molecules, the polymers, which in turn are formed from a large quantity of basic components, the monomers. In contrast to synthetic polymers, which are produced from fossil raw materials, the term 'biopolymers' refers to the origin of the basic components for the polymers, which come from renewable resources. Biopolymers are composed of materials derived from living organisms - in other words plants, animals or bacteria. These can be starches from potatoes, wheat or maize, cellulose from vegetable cell walls or proteins such as silk, spider's webs or hair. The properties of the material are determined by the length and molecular structure of the chains. Depending on the manufacturing process and the formulation of the material they can be regulated and optimised by additives such as natural fibres. The variety of bio-plastics which have been tested is already impressive today.
Moulding pressed from PLA granulate