Method for producing thermoplastic elastic fibers

Abstract

The invention relates to a method for producing thermoplastic elastic fibers. The method comprises the following steps of: 1, preparing thermoplastic elastomers serving as raw materials; 2, conveying the raw materials into a feed bin of a screw extruder; 3, extruding melt materials from the raw materials in the feed bin of the screw extruder at four different heating temperature areas in the screw extruder; 4, conveying the extruded melt materials into a metering conveying total pump to perform metering conveying by a pipeline in a spinning box; 5, conveying sprayed fibers to a curing passageway; 6, winding the fibers by using a winder at the winding speed of 650 meters / minute; 7, detecting; and metering and boxing for warehousing. The method has the advantages that a production process is simple, short in flow and low in production energy consumption, and non-pollution discharge is realized during production; the products have the performance of chlorine resistance, ultraviolet radiation resistance, acid resistance, alkali resistance, abrasion resistance, high air permeability and the like, the quality of the products is superior to that of products of BASF in Germany and Dupont in America, and the price is 30 to 40 percent lower than that of the products of BASF and Dupont; the grade of textile industry, clothing industry and industry of industrial elastic fibers and the like is improved, and the products are upgraded.

Description

technical field [0001] The invention relates to a production method of thermoplastic elastic fiber. The thermoplastic elastic fiber has the functions of chlorine resistance, ultraviolet radiation resistance, acid resistance, alkali resistance, high temperature resistance, wear resistance, good air permeability, etc., and belongs to the technical field of textile fiber production. Background technique [0002] At present, my country's annual demand for elastomer fibers is about 400,000 tons. With the rapid development of the country's economy, society and science and technology, the application of elastomer fibers in various fields of industrial production has an annual growth rate of 12-16%, and the market prospect is good. At present, the elastomeric fibers produced in my country are in the middle and lower grades in the world (low added value), and the middle and high-grade elastomeric fibers need to be imported. At present, there are two methods and processes for the prod...

AI Technical Summary

Problems solved by technology

At present, the elastomeric fibers produced in my country are in the middle and lower grades in the world (low added value), and the middle and high-grade elastomeric fibers need to be imported. At present, there are two methods and processes for the production of elastomeric fibers in my country: 1. Dry spinning method: it The advantages are: the filaments are more uniform, the strength is better, and the temperature resistance is higher; the disadvantages are: its raw materials PTMG, MDT polytetramethylene glycol, and diphenylmethane are mainly imported, and the method for producing the elastomer fiber is complicated. The process is long, the area is large, and the energy consumption is high (10,000 yuan of output value consumes 1-1.2 tons of standard coal). In the production process, harmful solvents are used (dimethylformamide and dimethylethylamine DMF , DMAC) emit more waste water, waste liquid, and waste gas. Among these three wastes, there are more COD, DMF, DMAC, SO and smoke dust, so there are harmful substances in the fibers.

The disadvantages are: the fiber has low temperature resistance (below 120°C), less uniform filaments, longer process, and poor control accuracy. The fiber has no other functions except elongation and rebound.

Produced fibers are less competitive in the market

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