Method of continuously preparing poly terephthaloyl-p-phenylene diamine fibre
A technology of poly-p-phenylene terephthalamide and poly-p-phenylene terephthalamide, which is applied in the field of continuous preparation of poly-p-phenylene terephthalamide fiber, can solve the problem of long dissolution time and unfavorable industrial Production, mixing difficulties and other problems, to achieve high mixing uniformity, improve production efficiency, and short defoaming time
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Embodiment 1
[0019] 100% concentrated sulfuric acid and poly-p-phenylene terephthalamide (PPTA) powder were added at a rate of 71.08g / min and 16.6g / min by using a liquid metering feeding system and a high-precision weight-loss continuous metering electronic scale. Φ40, length-to-diameter ratio of 15, counter-rotating twin-screw extruder 1 with a speed of 200rpm, after being fully mixed, continuously enter a twin-screw extruder with a diameter of 55mm, a length-to-diameter ratio of 60, and a speed of 40rpm In 2, control the screw temperature of twin-screw extruders 1 and 2 to be 85°C, continuously extrude the spinning solution that is fully mixed, the temperature is adjusted, and the bubbles are completely removed. After metering and filtering, it is sent to the spinneret. The size of the spinneret is Φ0.06×300 holes. It enters the coagulation bath spinning tube through the 5cm air gap layer. The coagulation bath temperature is 5°C, the spinning speed is 120m / min, and the nozzle is stretched...
Embodiment 2
[0021] 99% concentrated sulfuric acid and poly-p-phenylene terephthalamide (PPTA) powder were added at a rate of 71.08g / min and 16.6g / min to the Φ25, length-to-diameter ratio of 8, co-rotating twin-screw extruder 1 with a speed of 150rpm, after being fully mixed, continuously enter a twin-screw extruder with a diameter of 25mm, a length-to-diameter ratio of 30, and a speed of 200rpm In 2, control the screw temperature of twin-screw extruders 1 and 2 to be 50°C, continuously extrude the spinning solution that is fully mixed, the temperature is adjusted, and the bubbles are completely removed. After metering and filtering, it is sent to the spinneret. The size of the spinneret is Φ0.06×300 holes. It enters the coagulation bath spinning tube through the 5cm air gap layer. The coagulation bath temperature is 5°C, the spinning speed is 120m / min, and the nozzle is stretched 6 times. After the tow is washed and neutralized, it is sent to the heat treatment device, heat treated at 400...
Embodiment 3
[0023] 98% concentrated sulfuric acid and poly-p-phenylene terephthalamide (PPTA) powder were added at a rate of 70.08g / min and 20.6g / min by using a liquid metering feeding system and a high-precision weight-loss continuous metering electronic scale respectively. Φ90, length-to-diameter ratio of 20, counter-rotating twin-screw extruder 1 with a speed of 300rpm, after being fully mixed, it continuously enters a twin-screw extruder with a diameter of 145mm, a length-to-diameter ratio of 60, and a speed of 10rpm In 2, control the screw temperature of twin-screw extruders 1 and 2 to be 100°C, continuously extrude the spinning solution that is fully mixed, the temperature is adjusted, and the bubbles are completely removed. After metering and filtering, it is sent to the spinneret. The size of the spinneret is Φ0.06×300 holes. It enters the coagulation bath spinning tube through the 5cm air gap layer. The coagulation bath temperature is 5°C, the spinning speed is 120m / min, and the n...
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