The present invention provides 3D-printed polypropylene pellets and their preparation method for large-scale industrial models and outdoor construction applications. It resolves existing technical issues in 3D-printed polypropylene, such as high shrinkage, susceptibility to warping, and poor interlayer adhesion. The 3D-printable polypropylene pellets provided herein are produced by proportionally blending polypropylene, toughening agents, binders, compatibilizers, organic nucleating agents, antioxidants, and plasticizers. Glass fibers and mineral powders are side-fed into a twin-screw extruder, yielding modified polypropylene pellets through extrusion. This invention is particularly suitable for large-scale industrial models and outdoor architectural 3D printing, exhibiting high rigidity, excellent dimensional stability, and strong interlayer adhesion. It holds broad application prospects in pellet-based 3D printing technology.
Country Code: CN
Application Number: CN202211578154.X
