PLA Feedstock Filled with Spent Coffee Grounds for New Product Applications with Large-Format Material Extrusion Additive Manufacturing.

This behavior is confirmed by the 3D printed material formulations, which show a decreasing trend as the CM percentage increases (−15.5% between 100PLA0CM and 90PLA10CM), in agreement with similar studies with SCGs, 5 also on small-scale 3D printers. 13 , 30 The 3D printed samples show lower thermal stability as a function of CM loading, which triggers material degradation at lower temperatures.

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