How are bioplastics made?
Starch is extracted from residual waste from, for example, the potato industry. This starch is used to make bioplastic granulate.
Granules are small granules of about 4 mm in size. in the example of Fibernyl, starch and vibers and some biological additives are used to make granulate.
We process this granulate into sheets with a large extrusion machine. This is done by heating the granulate and pressing it through an extrusion nozzle via a worm screw.
Then the sheets is straightened by rolling to get it nice and smooth and at the right thickness. The roller can have a pinseal structure in order to transfer this structure to the sheet while it is still hot.
Finally, the sheets are cut to size and neatly stacked on pallets and sealed. A major advantage of bioplastics is that the production temperature is much lower than for the production of fossil plastics.
This saves energy and CO2.