LIQUID-CRYSTAL POLYESTER FIBERS AND METHOD FOR PRODUCING LIQUID-CRYSTAL POLYESTER FIBERS

Provided is a liquid crystal polyester fiber comprising a liquid crystal polyester, wherein a maximum value of a crystallite size of 20×10−10 m or larger. The maximum value is obtained by D=K·λ/β cos θ (wherein D represents a crystallite size, λ represents a wavelength of the measurement X-ray, β represents a half-value width (radian), θ represents a diffraction angle, and K represents a Scherrer constant (0.9)) based on a diffraction peak on a 110 plane of an X-ray diffraction spectrum measured by a wide angle X-ray diffraction method using X-ray having a wavelength of 1×10−10 m.