Preparation method for multifunctional polyester fibre
The present invention relates to a method for producing a multifunctional polyester fiber, including: mixing a polyester master batch chip, containing cesium tungsten oxide-based particles, with a general polyester chip; spinning the mixture to form a spun fiber; and cooling the spun fiber using a cooling device having a rotational outflow quenching unit and a nozzle-warming heater, and to a fiber produced by the method. The multifunctional polyester fiber according to the present invention exhibits excellent far-infrared emission properties, thermal storage/insulation properties, spinning processability, and dyeability.
1. A method for producing a multifunctional polyester fiber, the method comprising:
melt-mixing cesium tungsten oxide-based composite metal oxide particles with polyester to prepare a master batch chip;
mixing the prepared master batch chip with a general polyester chip to prepare a mixture, and spinning the mixture using a spinning nozzle having a sectional shape that enables the fiber to have a hollow sectional shape, thereby forming a spun fiber; and
after the spinning, cooling the spun fiber using a cooling device including a rotational outflow quenching unit and a nozzle-warming heater,
wherein the cesium tungsten oxide-based composite metal oxide particles are composite metal oxide particles composed of 100 parts by weight of WO 3 , 1-15 parts by weight of Cs 2 O, 0.1-2 parts by weight of Sb 2 O 3 , and 0.01-1 part by weight of SnO 2 0.01.
2. The method of claim 1 , wherein the master batch chip containing the cesium tungsten oxide-based composite metal oxide particles contains 10-30 wt % of the cesium tungsten oxide-based composite metal oxide particles.
3. The method of claim 1 , wherein the composite metal oxide particles have an average particle diameter of 0.5 μm or smaller, and a ratio of a number of particles having an average particle size of 0.05-0.1 μm to a total number of the particles in the fiber is 50-65%.
4. The method of claim 1 , wherein the master batch chip containing the composite metal oxide particles are mixed with the general polyester chip at a weight ratio ranging from 1:99 to 10:90.
5. The method of claim 1 , wherein a section of the spinning nozzle having the sectional shape that enables the fiber to have the hollow sectional shape has a hollow, cruciform, circular, semicircular, oval, C, D, sheath-core type or crossbar shape.