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

Abstract

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.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a process method and related equipment for producing high-performance flat yarn by using waste PET. Background technique [0002] The biggest use of polypropylene (PP) is to produce woven bags. Because polypropylene woven bags are easy to separate from the packaging, light in weight and low in cost, they have been widely used in the packaging of large-scale products such as chemicals, mineral powders, building materials and grains. . However, due to the poor weather resistance and easy oxidation of PP, it leads to its oxidative degradation. During the storage process, the mechanical strength of the woven bag, especially the impact strength, is greatly reduced, which affects the packaging effect. [0003] Polyethylene terephthalate (PET) has good mechanical properties and weather resistance. According to statistics, my country's annual production capacity o...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a modification method for producing flat yarns by using waste PET, improve melt viscosity and toughness, reduce broken yarns during drawing, make recovered PET have good processability, and then improve the drawing efficiency of flat yarns. Improve the elongation and softness, and solve the problem that the flat yarn is easy to slide during the weaving process

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