8-shaped hollow polyester fiber FDY (Fully Drawn Yarn) and preparation method thereof
A polyester fiber and hollow shape technology, which is applied in the field of polyester spinning, can solve the problems of weakening the extrusion swelling effect and poor shape retention effect of special-shaped fibers, and achieves improved shape retention effect, good shape retention effect, and improved spinning. Effect of wire speed
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Embodiment 1
[0048] A kind of preparation method of 8-shaped hollow polyester fiber FDY silk, at first prepare spinning melt, the steps are as follows:
[0049] (1) esterification makes dibasic acid glycol ester;
[0050] Prepare terephthalic acid, ethylene glycol and 2,6-naphthalene dicarboxylic acid into a slurry, the molar ratio of terephthalic acid, ethylene glycol and 2,6-naphthalene dicarboxylic acid is 1:1.2:0.02, add di After antimony, triphenyl phosphate and aluminum stearate are mixed evenly, carry out esterification reaction, the addition amount of antimony trioxide is 0.01% of the weight of terephthalic acid, and the addition amount of triphenyl phosphate is 0.01% of the weight of terephthalic acid. %, the esterification reaction is a pressurized reaction in a nitrogen atmosphere, the pressurized pressure is 0.1MPa, the temperature of the esterification reaction is 250 ° C, when the amount of water distilled in the esterification reaction reaches 90% of the theoretical value, i...
Embodiment 2
[0066] A kind of preparation method of 8-shaped hollow polyester fiber FDY silk, at first prepare spinning melt, the steps are as follows:
[0067] (1) esterification makes dibasic acid glycol ester;
[0068] Make a slurry of terephthalic acid, ethylene glycol and 4,4-biphenyl dicarboxylic acid, the molar ratio of terephthalic acid, ethylene glycol and 4,4-biphenyl dicarboxylic acid is 1:1.8:0.046, add acetic acid After antimony, trimethyl phosphite and zinc stearate are mixed evenly, carry out esterification reaction, the addition of antimony acetate is 0.045% of the weight of terephthalic acid, the addition of trimethyl phosphite is 0.045% of the weight of terephthalic acid %, the esterification reaction is a pressurized reaction in a nitrogen atmosphere, the pressurized pressure is 0.24MPa, the temperature of the esterification reaction is 258 ° C, when the amount of water distilled in the esterification reaction reaches 93% of the theoretical value, it is an esterification...
Embodiment 3
[0088] A kind of preparation method of 8-shaped hollow polyester fiber FDY silk, at first prepare spinning melt, the steps are as follows:
[0089] (1) esterification makes dibasic acid glycol ester;
[0090] The diterephthalate of terephthalic acid, ethylene glycol and bisphenol A is made into slurry, and the mol ratio of the diterephthalate of terephthalic acid, ethylene glycol and bisphenol A is 1: 1.3:0.025, add antimony trioxide, triphenyl phosphate and aluminum stearate and mix evenly, then carry out esterification reaction, the amount of antimony trioxide added is 0.015% of the weight of terephthalic acid, the amount of triphenyl phosphate added It is 0.015% of the weight of terephthalic acid. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.12 MPa, and the temperature of the esterification reaction is 251 ° C. When the amount of water distilled in the esterification reaction reaches the theoretical value 90% of the tim...
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