Method for producing terylen fibers from polyester waste

Abstract

The invention discloses a method for producing terylen fibers from polyester waste, which belongs to the field of synthetic fibers. The method comprises the following steps: sending dried polyester waste into a screw extruder, and carrying out melting extrusion to obtain the polyester melt; removing impurities by using a bipolar filter; carrying out high-polymer chemical reaction on the polyester melt, homogenizing the molecular weight of high polymers, and increasing the polyester viscosity; carrying out precision filtering on the thickened melt by using a melt precision filter; spinning the melt in a spinning trunk in a metering mode, and cooling to cure and form the thread line; and finally, winding to obtain filament according to different product process requirements. The method can greatly enhance the quality of the polyester spun melt, and greatly improve the uniformity of melt viscosity. Meanwhile, the terylen fibers are filtered for multiple times, so that the regenerated polyester melt has the advantages of fewer impurities, fewer broken ends, high full roll rate, high yield and low loss.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

AI Technical Summary

Benefits of technology

Polyethylene terephthalate (PET) was first discovered over 35 years ago but it wasn't until 1952 when researcher Daniel Kistler found its chemical structure on PTA flakes made from petrochemistry. They then developed methods called esterification chemistry or transesterificat ionization technology to make plastics faster than traditional materials like metal. These new technologies have led to better properties of these polymers more efficiently and at lower prices. Overall, this patented process allows us to create stronger items through reused material instead of discarded ones.

Problems solved by technology

This patented technical problem addressed in this patents relates to producing high-strength fibers from waste plastic that contains various types of polymeric substances like polystyrene, styrenebutene rubbers, tetraethylammonium bromide, dimmers thereof, vinylidone monomer residues, acrylic acid esters, aliphatic hydrocarbons, alkoxymethanes, amines, alcohols, carboxypolyimides, oxazolidones, sulfur compounds, nitrogen containing heterocycles, oxygenated organics, metal salts, water vapor, carbon dioxide gas, among others. These contaminants affect productivity and durability while reducing their effectiveness over time due to repeated use. Additionally, current processes involve heat treatment followed by cool down crystallization steps leading to lower mold temperature and increased energy usage compared to traditional methodology.