Low-color-difference polyester superbright trilobal profiled yarn and preparation method thereof
A special-shaped yarn, polyester technology, applied in the direction of one-component polyester rayon, filament/thread forming, textile and papermaking, etc.
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Embodiment 1
[0069] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:
[0070] (1) Preparation of catalyst magnesium ethylene glycol:
[0071] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 6V, the cathode current density is 150mA, and electrolyze for 10 hours at 50°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0072] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0073] Esterification reaction:
[0074] Use terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, add anti-ether agent sodium ace...
Embodiment 2
[0092] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:
[0093] (1) Preparation of catalyst magnesium ethylene glycol:
[0094] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 10V, the cathode current density is 200mA, electrolyze at 60°C for 12 hours, after the electrolysis ends Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0095] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0096] Esterification reaction:
[0097] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 2.0:1, addi...
Embodiment 3
[0114] A method for preparing polyester ultra-bright trilobal profiled yarn with low color difference, the main process includes:
[0115] (1) Preparation of catalyst magnesium ethylene glycol:
[0116] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 7V, the cathode current density is 160mA, and electrolyze for 11 hours at 55°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0117] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0118] Esterification reaction:
[0119] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.5:1, adding anti-ether agent sodiu...
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