They explain: “However, lignin-modified nylon composites containing 40 to ... as the researchers seem to have found a way to combine multiple materials that apparently enhance each other’s 3D printing ...

Polypropylene (PP) is a thermoplastic that has a number of properties ... with 3D printing, including PLA, ABS and nylon (PA). Much like ABS (and the similar ASA), it is a pretty touchy material ...