Melt directly-spun colored polyester fiber and preparation method thereof
A colored polyester, melt direct spinning technology, applied in the direction of melt spinning, stretch spinning, fiber treatment, etc., can solve the problem of poor fiber gloss
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Embodiment 1
[0073] A kind of preparation method of melt direct spinning colored polyester fiber, the steps are as follows:
[0074] (1) preparation of modified polyester;
[0075] (a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added , titanium dioxide and triphenyl phosphate are mixed evenly, and the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. 90% of the value is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate 0.05% of the weight of terephthalic acid, wherein the structural formula of 2-ethyl-2-methyl-1,3-propanediol is...
Embodiment 2
[0083] A kind of preparation method of melt direct spinning colored polyester fiber, the steps are as follows:
[0084] (1) preparation of modified polyester;
[0085] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add antimony ethylene glycol and titanium dioxide After mixing evenly with trimethyl phosphate, carry out the esterification reaction under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. 91% is the end point of the esterification reaction, wherein the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of titanium dioxide is 0.21% of the weight of terephthalic acid, and the addition of trimethyl phosphate is 0.02% of the weight of terephthalic acid. 0.03% by weight of phthalic acid, wherein the structural formula of 2,2-diethyl-1...
Embodiment 3
[0093] A kind of preparation method of melt direct spinning colored polyester fiber, the steps are as follows:
[0094] (1) preparation of modified polyester;
[0095] (a) Esterification reaction: terephthalic acid, ethylene glycol, and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and titanium dioxide are added After mixing evenly with trimethyl phosphite, carry out esterification reaction under pressure in a nitrogen atmosphere. 92% is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.03% of the weight of terephthalic acid. 0.01% by weight of phthalic acid, wherein the structural formula of 2-butyl-2-ethyl-1,3-propanediol is as follows:
[0096]
[0097] (b) polycondensation reaction; after the esterificatio...
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