Method for preparing PET raw materials from leftover materials of polyester fabrics

Abstract

The invention discloses a method for preparing PET raw materials from leftover materials of polyester fabrics. The method comprises the steps that the leftover materials of the polyester fabrics are crushed, put into a chemical tank to be soaked and pyrolyzed with ethylene glycol, and then filtering, decoloration, purification and polymerization are conducted to obtain the PET raw materials. The smashed leftover materials of the polyester fabrics are put into the chemical tank to be pyrolyzed and dissolved with the ethylene glycol, and then polyester fibers are dissolved into PET monomers. After the polyester fibers are dissolved, the dissolved polyester fibers are still mixed with other plant fibers or chemical fibers, various dyes and other impurities, and a filtering mode is adopted forthoroughly separating the PET monomers. A purification technology further needs to be adopted for purification on the PET monomers after filtering, decoloration and separation to obtain the polymerization monomers with purified PET. The pure PET monomers obtained through purification are subjected to a polymerization technology to obtain the PET raw materials. The PET raw materials are obtained through polymerization, the viscosity and the like can be adjusted according to product requirements to obtain the PET raw materials with different kinds of viscosity, and different requirements for application in fiber spinning, thin film preparing, bottle blowing, sheet squeezing, modification and the like are met.

Description

technical field [0001] The invention discloses a method for reducing polyester cloth leftovers into PET raw materials. [0002] technical background [0003] As we all know, the existing scraps of polyester cloth can neither be reused nor directly reprocessed after recycling, and can only be landfilled or incinerated. Not only wasting land resources but also causing secondary pollution. Contents of the invention [0004] The purpose of the present invention is in order to overcome the defective of above-mentioned background technology, fundamentally completely eliminates this backward treatment mode, completely solves the second pollution. [0005] In order to achieve the above object, the technical solution of the present invention is as follows: [0006] The invention provides a method for reducing polyester cloth scraps into PET raw materials. Said method is to crush the scraps of polyester cloth, put them into a chemical tank and soak them in ethylene glycol for crac...

AI Technical Summary

Problems solved by technology

[0003] As we all know, the existing scraps of polyester cloth can neither be reused nor directly reprocessed after recycling, and can only be used as garbage landfill or incineration.

Not only waste land resources but also cause secondary pollution