Thermal energy storage and heat insulation polyester fiber, and preparation method therefor
The present invention is directed to a method for preparing a polyester fiber, the method including: mixing 5-50 wt % of composite metal oxide particles, including a tungsten-based oxide, a cesium-based oxide, an antimony-based oxide, an indium-based oxide, and a tin-based oxide, with 40-90 wt % of one or two types of organic solvents selected from among alcohol, ketone, and acetates, 0.4-20 wt % of polyvinyl butyral, i.e., polymer, and 2-30 wt % of calcium stearate or magnesium stearate to obtain a mixture, and stirring and grinding the mixture to prepare a dispersion liquid; drying the dispersion liquid to prepare a powdered additive; mixing 1-30 wt % of the additive with polyester chips to obtain a mixture and melting this mixture to prepare master batch chips; and mixing 1-10 wt % of the master batch chips with general polyester chips to obtain a mixture, and melting and spinning this mixture.
1. A polyester fiber comprising 0.01-2 wt % of composite metal oxide particles in which a tungsten-based oxide, a cesium-based oxide, an antimony-based oxide, an indium-based oxide, and a tin-based oxide are mixed.
2. The polyester fiber of claim 1 , wherein the composite metal oxide particles comprise, based on 100 parts by weight of WO 3 , 3-20 parts by weight of Cs 2 O, 1-10 parts by weight of Sb 2 O 3 , 0.5-5 parts by weight of In 2 O 3 , and 0.1-1 part by weight of SnO 2 .
3. The polyester fiber of claim 1 , wherein the polyester fiber has a single-fiber fineness of 0.5-3 denier.
4. A fabric product using a polyester fiber, wherein the polyester fiber is the polyester fiber set forth in claim 1 .
5. A method for preparing a polyester fiber, the method comprising:
mixing 5-50 wt % of composite metal oxide particles, including a tungsten-based oxide, a cesium-based oxide, an antimony-based oxide, an indium-based oxide, and a tin-based oxide, with 40-90 wt % of one or two types of organic solvents selected from among alcohol, ketone, and acetates, 0.4-20 wt % of polyvinyl butyral, i.e., polymer, and 2-30 wt % of calcium stearate or magnesium stearate to obtain a mixture, and stirring and grinding the mixture to prepare a dispersion liquid;
drying the dispersion liquid to prepare a powdered additive;
mixing 1-30 wt % of the additive with polyester chips to obtain a mixture and melting this mixture to prepare master batch chips; and
mixing 1-10 wt % of the master batch chips with general polyester chips to obtain a mixture, and melting and spinning this mixture.
6. The method of claim 5 , wherein the composite metal oxide particles comprise, based on 100 parts by weight of WO 3 , 3-20 parts by weight of Cs 2 O, 1-10 parts by weight of Sb 2 O 3 , 0.5-5 parts by weight of In 2 O 3 , and 0.1-1 part by weight of SnO 2 .
7. The method of claim 5 , wherein the polyester chips used in the preparation of the master batch chips have an intrinsic viscosity of 0.60-0.70 dl/g.
8. The method of claim 5 , wherein the additive included in the master batch chips has an average particle size of 2 μm or less.
9. The method of claim 5 , wherein the organic solvents are a mixture of one or two types of materials selected from among alcohol, ketone, and acetone.
10. The method of claim 5 , wherein the spinning of the mixture is performed using a spinning nozzle having a C-shaped cross section.