Continuously raising annual use of bioplastics and further development of these types of raw materials are evidence for the great demand for suitable production systems for bio-based plastics. The required drying parameters, such as drying temperatures, specific dry-air volumes, drying times and dew points differ from familiar data for traditional granulates.
A project sponsored by the German Federal Ministry for Economic Affairs and Energy allowed Digicolor to systematically develop guidelines for the drying of bio-based plastics. Comprehensive lab tests have been necessary in order to determine, for example, the mechanical and physical properties of the finished parts in relation to the dryness level of the used granulates.
These interactions as well as the in-depth test results have contributed to the development of a new dryer series, our Drywell Bioline. A comprehensive product range of bio-dryers is the result. These granulate dryers allow the drying of materials such as bio-based polyamides, PLA- or WPC even at low drying temperatures.