Method for manufacturing composite yarn for flame-retardant protective clothing

Abstract

The invention provides a method for manufacturing a composite yarn for flame-retardant protective clothing, and relates to the field of the textile industry. The method for manufacturing the composite yarn for the flame-retardant protective clothing comprises the steps as follows: guiding and feeding a polyphenylene sulfide (PPS) fiber filament to a front roller on a spinning frame, feeding two rough yarns independently, drafting and twisting the two rough yarns for the first time, twisting the two rough yarns with the PPS fiber filament, and obtaining the composite yarn for the flame-retardant protective clothing, wherein each rough yarn is made from one or more flame-retardant and fusion-resistant fibers. With the adoption of the composite yarn for the flame-retardant protective clothing manufactured by the method, high temperature resistance of a PPS fiber is improved, the service life of the PPS fiber is prolonged, the problem of high temperature fusion of the PPS fiber is avoided, and the application field of the PPS fiber is expanded.

Description

technical field [0001] The invention relates to the field of textile industry, in particular to a method for manufacturing composite yarn for flame-resistant protective clothing. Background technique [0002] Polyphenylene Sulfide (PPS) fiber is one of the newly developed high-performance fibers in recent years. It is a linear, high molecular weight, crystalline polymer with excellent heat resistance and chemical corrosion resistance. Properties and flame retardancy, high strength, good electrical properties, dimensional stability and good textile processability. As soon as PPS fiber came out, it attracted the attention of the industrial field, especially the high temperature field. The main use of PPS fiber is as a filter fabric with high temperature resistance and corrosion resistance, and it can also be used as needle felt for papermaking, protective cloth, sewing thread, electrical insulation material, etc. [0003] PPS fiber has excellent strength, rigidity and fatigu...

AI Technical Summary

Problems solved by technology

In the air, the decomposition temperature is 480°C, but the melting point of PPS fiber is about 285°C, which is similar to that of conventional synthetic fibers, and it is prone to melting at higher temperatures, so it cannot be used as a high temperature resistant fiber.

This limits the expansion of the application field of this high-performance fiber

[0004] The general use temperature of PPS fiber is 180°C, and the use temperature of filter fabric is 190-220°C. Long time in this high temperature environment will reduce the mechanical properties and service life of PPS fiber.

When used as a flame-retardant protective fabric, it can only be used for protection in general environments. For ultra-high temperature operating environments such as metallurgy, fire protection, industrial furnaces, chemical industries, etc., PPS fibers are in danger of melting, so their use is limited.