Flame-retarding low-melting-point polyester fiber and preparation method thereof
A low-melting point polyester and flame-retardant polyester technology, which is applied in fiber processing, conjugated synthetic polymer artificial filament, filament/thread forming, etc., can solve problems such as slow melting speed, high melting point, and single variety , to achieve the effect of fast melting speed, lower melting point and low melting point temperature
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Embodiment 1
[0047] A preparation method of flame-retardant low-melting polyester fiber:
[0048] The preparation steps of low melting point polyester:
[0049] (1) Esterification reaction;
[0050] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and 2-pentyl-1,12 dodecanediol into a slurry, carry out esterification reaction, pressurized reaction under nitrogen atmosphere, The pressurized pressure is normal pressure and the temperature is 230°C. When the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; among them, terephthalic acid, m- The molar ratio of phthalic acid, diethylene glycol, 2-pentyl-1,12 dodecanediol and ethylene glycol is 1:0.4:0.1:0.05:1.8;
[0051] (2) polycondensation reaction;
[0052] Then, under the action of catalyst and stabilizer, the polycondensation reaction in the low vac...
Embodiment 2
[0067] A preparation method of flame-retardant low-melting polyester fiber:
[0068] Low melting point polyester polymerization steps:
[0069] (1) Esterification reaction;
[0070] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and 2-hexyl-1,12 dodecanediol into slurry, carry out esterification reaction, pressurize reaction under nitrogen atmosphere, add The pressure is 0.3 MPa, the temperature is 250 ° C, when the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; among them, terephthalic acid, m-benzene The molar ratio of dicarboxylic acid, diethylene glycol, 2-hexyl-1,12 dodecanediol and ethylene glycol is 1:0.6:0.3:0.1:2.5;
[0071] (2) polycondensation reaction;
[0072] Then, under the action of catalyst and stabilizer, the polycondensation reaction in the low vacuum stage starts...
Embodiment 3
[0087]A preparation method of flame-retardant low-melting polyester fiber:
[0088] Low melting point polyester polymerization steps:
[0089] (1) Esterification reaction;
[0090] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, p-ethylbenzoic acid and 2-heptyl-12 dodecanediol into a slurry, carry out esterification reaction, in a nitrogen atmosphere Under pressurized reaction, the pressurized pressure is 0.1MPa, and the temperature is 240°C. When the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; wherein, for The molar ratio of phthalic acid, isophthalic acid, diethylene glycol, 2-heptyl-12 dodecanediol, and ethylene glycol is 1:0.5:0.2:0.07:2; the amount of p-ethylbenzoic acid added 0.1% of the moles of phthalic acid.
[0091] (2) polycondensation reaction;
[0092] Then, under t...
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