Industrial PET-CF is a carbon fiber-reinforced composite filament based on PET (Polyethylene terephthalate). Well-dispersed 15wt% carbon fibers enhance the rigidity, strength, heat, and chemical resistance of the PET matrix. After annealing, PET-CF stabilizes its heat resistance at around 150ºC and tensile modulus and strength of over 6 GPa and 80 MPa respectively. The parameters of high printability, dimensional stability, high creep resistance, and low moisture absorption make PET-CF an ideal choice for reliable carbon fiber composite printing for strong and cost-effective end-use applications, such as jigs. fixtures, functional parts.