In this study, we used four types of BC particles with different material properties: the composition of three polymers and carbon nanofibers in different mass ratios, as indicated in section S2 of the SI. AM particles and one type of aforementioned BC particle are included in each of our simulations, and the filaments obtained after the extrusion process for 3D printing are similarly named with serial numbers. Here, we have named them F1, F2, F3 and F4.