Polyester-containing waste textile recycling technology

Abstract

The invention relates to a polyester-containing waste textile recycling technology, and belongs to the technical field of waste material recycling or processing. The polyester-containing waste textile recycling technology comprises the steps of cutting off, cleaning, drying, cutting and compacting and tackifying in sequence, wherein according to the cutting off step, waste filaments are carded with fingers of a cutting off machine and then cut off by a reciprocating cutter, after the waste filaments are cut into set length, cleaning and dewatering and drying are carried out in a fragment mode, the moisture content is controlled to be 0.5% or lower, and the waste filaments are fed into the compacting procedure, extruded, heated, plastified and then tackified. The polyester-containing waste textile recycling technology is applied to recycling of polyester products, and has the advantages that production is stable, multiple varieties of raw materials are used, the product quality is reliable, and energy consumption is low.

Description

technical field [0001] The invention relates to a process for recycling waste textiles containing polyester, and belongs to the technical field of waste recycling or processing. Background technique [0002] PET polyester has become the world's largest synthetic polymer material due to its good physical and chemical stability, cost performance, and stretchability. Tens of millions of tons of polyester enter the field of clothing every year. As the downstream petrochemical polyester industry, on the one hand, it is facing the current situation that petroleum resources are non-renewable and depleted; come a huge burden. Therefore, how to recycle waste polyester products, realize effective recycling of resources, and reduce environmental pollution has become an urgent problem to be solved in the polyester industry. [0003] The recycling of waste polyester should be carried out in accordance with the principle of maximizing recycling and cleaning the recycling process. Polye...

AI Technical Summary

Problems solved by technology

[0004] The physical method has the characteristics of saving investment and low processing cost, but due to the impurities such as spinning oil and printing and dyeing auxiliaries in waste polyester, the degree of polymerization of recycled polyester is reduced and the hue is deteriorated, which limits the use of recycled polyester

Zhejiang Lvyu Environmental Protection Co., Ltd. has authorized patents 201320600503.3 and 201520531917.4. In the process route that can be recycled without cleaning, polyester waste is not cleaned and dried, which saves water resources. However, due to vacuum suction efficiency and spinning The surfactant components in silk additives are difficult to volatilize, and the color value and intrinsic viscosity of the final product are still not ideal

However, the cleaning process of the traditional physical recovery process consumes a lot of water resources. For example, in the process of manufacturing foam materials, each ton of product needs to consume more than 4 tons of water; It is required that "the annual production capacity of recycled chemical fiber (polyester filament) (hereinafter referred to as recycled polyester filament) shall not be less than 20,000 tons", "for the production of recycled polyester filament, the fresh water intake shall be less than 0.70 tons / ton", " The reuse rate of industrial water shall not be lower than 86%”

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