Method for producing ribbon-like filaments through waste PET (polyethylene terephthalate)

The invention discloses a method for producing ribbon-like filaments through waste PET (polyethylene terephthalate), belonging to the field of high molecular material processing. The method comprises the steps of: tackifying and toughening the waste PET in a reactive extrusion manner, directly extruding ribbon-like filaments through a special filament dividing mould, cooling the ribbon-like filaments, drafting the cooled ribbon-like filaments through a water bath heating drafting method to orientate the ribbon-like filaments, sizing the oriented ribbon-like filaments through an electrical inductance heating roller, cooling the sized ribbon-like filaments through a cooling roller, and coiling the cooled ribbon-like filaments. The prepared PET ribbon-like filaments have properties of good toughness, drafting and the like, the problem that PET ribbon-like filaments are liable to break when being drafted in the production process is effectively solved, and the breaking strength of the produced PET ribbon-like filaments is higher than 50MPa, so that the PET ribbon-like filaments can be applied to the field of production of high-performance woven bags and container bags.