Alternative Trifilon Switch® - Bio-based plastic polymers Trifilon Switch® is a bio-based plastic from a leading Swedish biocomposite-maker. Switch uses polymer resins derived from starch, which are plant-based, and reinforces them with industrial hemp fibers from Northern European farms. The blends are available in different ratios, currently from 10 to 30% fiber-fill. Trifilon delivers granulates that can be used in existing injection molding machines. Switch is also available for extrusion molding.