A kind of low color difference polyester imitation cotton type differential shrinkage composite yarn and its preparation method
A composite yarn and different shrinkage technology, which is applied in the direction of single-component polyester rayon, melt spinning, etc., can solve the problem of increased air content in PET different shrinkage mixed fiber composite yarn fabrics
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Embodiment 1
[0085] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:
[0086] (1) Preparation of catalyst magnesium ethylene glycol:
[0087] 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;
[0088] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0089] Esterification reaction:
[0090] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, adding...
Embodiment 2
[0124] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:
[0125] (1) Preparation of catalyst magnesium ethylene glycol:
[0126] 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;
[0127] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0128] Esterification reaction:
[0129] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephtha...
Embodiment 3
[0163] A preparation method of a low-chromatic-difference polyester imitation cotton type different shrinkage composite yarn, the main process includes:
[0164] (1) Preparation of catalyst magnesium ethylene glycol:
[0165] 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;
[0166] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0167] Esterification reaction:
[0168] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol and terephthalic acid is 1.5:1, addin...
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