Continuous spinning system of poly (p-phenylene terephthalamide)

Abstract

The invention provides a continuous spinning system of poly (p-phenylene terephthalamide). The continuous spinning system comprises a spinning raw solution screw rod mixing and dissolving machine, a spinning machine, post-treatment equipment and a winding machine, wherein a spinning raw solution is sufficiently mixed and dissolved in the screw rod mixing and dissolving machine; the mixing is realized by a pre-mixing screw rod extruder; a mixed solution is realized by a mixing screw rod extruder; a connecting piece is arranged between the pre-mixing screw rod extruder and the mixing extruder; a filter is additionally arranged between the mixing screw rod extruder and the spinning machine; a wire bundle is spun by the spinning machine and is wound by the winding machine through the post-treatment equipment to form a final finished product; the post-treatment equipment comprises a traction machine, water washing equipment, drying equipment and an oiling machine; and the equipments are arrayed in a staggered manner. According to the continuous spinning system of the poly (p-phenylene terephthalamide), the defects in the prior art are overcome; the optimized design scheme perfectly fuses three steps including mixing, dissolving and de-foaming; a reasonable post-treatment process is provided and the equipments are arrayed in the staggered manner, so that the production efficiency is high, the quality of the finished product is good and the cost is low; and therefore, the continuous spinning system lays a foundation for large-scale industrialization of an aramid fiber spinning system of China.

Description

technical field [0001] The invention discloses a continuous spinning system of poly-p-phenylene terephthalamide, and more specifically relates to a continuous spinning system capable of industrialized production of poly-p-phenylene terephthalamide, which belongs to Special high-performance fiber production technology field. Background technique [0002] Poly(p-phenylene terephthalamide) has the characteristics and characteristics of high strength, high modulus, high temperature resistance, acid and alkali resistance, organic solvent corrosion resistance, low density, etc., and has appropriate toughness for textile processing. Because poly-p-phenylene terephthalamide has extremely high strength, which is 5 to 6 times that of high-quality steel, its modulus is 2 to 3 times that of steel and glass fiber, its toughness is 2 times that of steel, and its weight is only 1 / 5 of the steel, the silk spun from it has the reputation of "artificial steel wire". "Artificial steel wire" ...

AI Technical Summary

Problems solved by technology

[0006] 1. Due to the dissolution of the reactor, the degassing of the material is an intermittent process, which affects the smooth progress of continuous spinning;

[0007] 2. Due to the low stirring efficiency of the reactor, the mixing and dissolving of materials takes a long time and is difficult to control, the shearing efficiency is low, and the mixing efficiency is poor, which makes it difficult to achieve the desired effect of material dissolution;

[0008] 3. Due to the low stirring efficiency of the defoaming equipment, it takes a long time and the material defoaming efficiency is poor, which seriously affects the subsequent spinning;

[0009] 4. Due to the long time-consuming for dissolution and defoaming, the material is seriously degraded, which affects the product quality;

[0010] 5. Dissolving and defoaming are carried out in two different devices respectively, and there are problems of material transportation between devices and switching problems of the same device, etc.;

[0011] 6. The liquid crystal material formed after dissolving and defoaming in different equipment is directly sent to the spinning machine from the defoaming device, which affects the quality of the filaments, and the broken filament rate is high, which affects the industrial scale production of PPTA;

[0012] 7. There is a high rate of broken filaments in the transfer process of the spun long fiber tow between post-processing equipment, which ultimately affects the qualified rate of finished products

[0013] Due to the above-mentioned problems in the known aramid spinning system, the process of aramid long fiber production and chemical industry is slow

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