Polyester mutifilament yarn
A polyester multifilament and polyester technology, applied in the field of polyester multifilament yarn, can solve the problems of insufficient improvement and the like
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Embodiment 1
[0162] A mixture of 100 parts by weight of dimethyl terephthalate and 70 parts by weight of ethylene glycol was further mixed with 0.009 parts by weight of tetra-n-butyl titanate. The resulting mixture was placed in a stainless steel reactor with a heating device and a pressurizing device, and the internal pressure of the reactor was raised to 0.07 MPa and the temperature of the mixture was raised to 140° C. to 240° C., thereby subjecting the mixture to transesterification. Then, the resulting reaction mixture was mixed with 0.35 parts by mass of triethyl phosphonoacetate (TEPA) and 0.07 parts by mass of TiO 2 The components of the matting agent are mixed, and then the transesterification reaction is terminated. The resulting reaction mixture was transferred into a polymerization reactor, heated to 290° C., and polycondensation was carried out under a high vacuum of 26.67 Pa or lower. A polyester polymer having an intrinsic viscosity of 0.63 and a diethylene glycol content of...
Embodiment 2
[0170] Polyester polymers, polyester multifilament yarns, and plain fabrics were produced by the same procedure as in Example 1, except as described below.
[0171] As the titanium component used for the catalyst, 0.016 parts (by mass) of titanium trimellitate produced by the method described below was used.
[0172] Synthesis of 1,2,4-titanium trimellitate
[0173] A 0.2% ethylene glycol solution of trimellitic anhydride was mixed with 1 / 2 mole of titanium tetrabutoxide per mole of trimellitic anhydride, and the resulting mixture was passed by maintaining its The reaction was carried out at 80°C for 60 min in air atmosphere, ambient atmospheric pressure, and 80°C. The reacted mixture was cooled to room temperature. The obtained catalyst was crystallized by using acetone 10 times the amount of the mixture, the resulting deposit was separated by filtration with filter paper, and the filtered deposit was dried at 100° C. for 2 hr to provide the target titanium compound.
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Embodiment 3
[0177] Polyester polymer, polyester multifilament yarn, and plain fabric were produced by the same procedure as in Example 1, except that polyester polymer chips were produced by the following procedure.
[0178] Production of Polyester Polymers
[0179] In a reactor equipped with 225 parts (by mass) of polyester oligomers and adjusted at 255 ° C, ambient atmospheric pressure, nitrogen atmosphere, fed with a constant feed rate by mixing 179 parts (by mass) of high A slurry prepared from pure terephthalic acid and 95 parts (by mass) of ethylene glycol for esterification of terephthalic acid and ethylene glycol. The esterification reaction was carried out for 4 hours, and the water and ethylene glycol generated by the reaction were distilled out from the reaction system simultaneously to complete the reaction. In this reaction, the degree of esterification is 98% or higher, and the degree of polymerization of the resulting oligomer is about 5-7.
[0180] 225 parts (by mass) ...
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