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Carbon fibre recycling from milling dust for the application in short fibre reinforced thermoplastics

Uhlmann, Eckart; Meier, Paul

A new approach to reuse accruing chips and dust from milling operations of carbon reinforced plastics (CFRP) is studied, show-ing how CFRP milling dust, in comparison to primary and pyrolysed fibres, can find application as a filler material in thermo-plastic granulates. Recent examinations show an overall better handling of milling dust when separating it into different classes of fibre lengths reaching up to 600 µm, which typically occur while machining reinforced plastics. Furthermore, the carbon rein-forced polypropylene granulates have improved material properties, e.g. increased rigidity and tensile strength in dependence of their respective filler content towards non-reinforced plastics.
Published in: 1st CIRP Conference on Composite Materials Parts Manufacturing (CIRP CCMPM 2017), 10.1016/j.procir.2017.03.277, Elsevier