Like traditional molding materials, 3D printing filament are also formed and processed by heating and melting. Due to their stable formation into solid models after cooling and solidification, and the absence of chemical cross-linking reactions, they can be recycled, remelted, and recycled like thermoplastic materials. Compared with 3D printing filament, traditional thermosetting molding materials undergo chemical cross-linking after forming, making it difficult to heat and melt again, and thus difficult to achieve recycling and reuse.