| abstract |
(57) [Summary] An object of the present invention is to obtain a polyester fiber which is excellent in productivity, has high hygroscopicity, and can be used as a comfortable material such as underwear, sportswear, and lining as a woven or knitted fabric. SOLUTION: The silica-based inorganic particles and the particles are polyester fibers containing inorganic particles having opposite surface potentials and can be solved by polyester fibers having excellent hygroscopicity and productivity. |