Regenerated cationic dyeable polyester filament and its preparation method
A polyester filament, cationic technology, applied in the direction of rayon manufacturing, single-component polyester rayon, fiber chemical characteristics, etc., can solve the problems of oil resource depletion, environmental pollution, etc., to reduce environmental pollution and slow down energy consumption. Effect of depletion and saving energy loss
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Embodiment 1
[0027] in such as figure 1 In the reactor 1 shown in the reaction flow diagram, waste polyester bottle flakes and ethylene glycol are put into the reactor 1 in a molar ratio of 1:1, and antimony trioxide and 50 ppm of Zinc acetate composite catalyst for depolymerization reaction, control the BHET product to be more than 50% until the end of the reaction, control the temperature at 230°C and add monoglycol isophthalate with a mass ratio of 50% of 1% of the total mass of polyester -5-Sodium sulfonate ethylene glycol slurry, add 3wt% adipic acid and 50ppm antioxidant 1010, react for 60 minutes, carry out vacuum polycondensation, polymerize into cationic dyeable recycled polyester, after the polycondensation reaction Pelletize, dry, and spin at 290°C to obtain cationic dyeable recycled polyester filaments.
Embodiment 2
[0029] in such as figure 1 In the reactor 1 shown in the reaction flow chart, the waste polyester material and ethylene glycol are put into the reactor 1 in a molar ratio of 1:3, and ethylene glycol antimony and 50 ppm of acetic acid are put into the polyester waste mass ratio of 500 ppm Zinc composite catalyst for depolymerization reaction, control the BHET product to be more than 90% until the end of the reaction, control the temperature at 250°C and add monoglycol isophthalate-5- Sodium sulfonate ethylene glycol slurry, 7% isophthalic acid and 100ppm antioxidant 168, reacted for 30 minutes, then vacuum polycondensed, polymerized into cationic dyeable recycled polyester melt, cationic dyeable recycled polyester The ester melt is spun at 285° C. in a direct melt spinning equipment to obtain cationic dyeable recycled polyester filaments.
Embodiment 3
[0031] in such as figure 1 In the reactor 1 shown in the reaction flow chart, waste polyester fibers and ethylene glycol are put into the reactor 1 in a molar ratio of 1:6, and n-butyl titanate and 100 ppm of Zinc acetate composite catalyst for depolymerization reaction, control the BHET product to be more than 80% until the reaction is over, control the temperature at 260°C and add monoglycol isophthalate-5 with a concentration of 30% of the total polyester content of 3% -Sodium sulfonate ethylene glycol slurry, 1wt% adipic acid, 3wt% isophthalic acid and 200ppm antioxidant 1010, after reacting for 50 minutes, carry out vacuum condensation polymerization, and polymerize into cationic dyeable recycled polyester melt , The cationic dyeable recycled polyester melt is spun at 280°C in direct melt spinning equipment, and the cationic dyeable recycled polyester filament with a fineness of 76dex / 36f is obtained through a winding speed of 3000m / s.
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