Method for preparing high-quality melt through alcoholysis of waste polyester textile with ethylene glycol
A technology of waste polyester and ethylene glycol, which is used in the preparation of spinning solutions, textiles and papermaking, single-component polyester rayon, etc., can solve the problems of product quality impact, increased production cost, and limited viscosity increase. , to solve the easy blockage of the pipeline, improve the flow performance, and prolong the service life.
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Embodiment 1
[0028] After compounding the foam material according to the impurity content, color, viscosity difference, etc., it is rotated and dried for 9 hours under a certain vacuum (≤-0.96MPa) and temperature (145°C±5°C), and finally 90PPm of water is put into the spinning silo. Adjust the speed of the ethylene glycol pump so that the mass fraction of ethylene glycol measured is 4% of the foam material, the feed rate of the screw is 1t / h, and the temperature from the first to the tenth zone of the screw is 280°C, 285°C, and 295°C in sequence , 295°C, 295°C, 290°C, 290°C, 285°C, 285°C, 285°C, the filter temperature is 285°C, and the residence time of the melt in the screw, filter and pipeline is 16min. It takes 75 minutes to enter the liquid-phase tempering and viscosity-adjusting device. The vacuum degree of the vertical kettle and the horizontal kettle are 200Pa~185Pa and 100Pa~60Pa respectively, and the temperature of the kettle is 285°C. Continuously run for 48 hours in the case of ...
Embodiment 2
[0032]After compounding the foam material according to the impurity content, color, viscosity difference, etc., it is rotated and dried for 8.5 hours under a certain vacuum (≤-0.96MPa) and temperature (145°C±5°C), and 105PPm is put into the spinning silo. Adjust the speed of the ethylene glycol pump so that the mass fraction of ethylene glycol measured is 5% of the foam material, the feed rate of the screw is 0.8t / h, and the temperature from the first to the tenth area of the screw is 280°C, 285°C, and 295°C. ℃, 295℃, 295℃, 290℃, 290℃, 285℃, 280℃, 280℃, the filter temperature is 285℃, and the residence time of the melt in the screw, filter and pipeline is 20min. It takes 90 minutes to enter the liquid-phase tempering and viscosity-adjusting device. The vacuum degree of the vertical kettle and the horizontal kettle are 200Pa~185Pa and 100Pa~60Pa respectively, and the temperature of the kettle is 280°C. Continuously run for 48 hours under the condition of similar raw materials...
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