| 摘要 |
<p>An orthochromatic polyester resin composition of excellent color being available in a wide variety of uses (fibers, films and other molding products), comprising an aromatic polyester polymer and an orthochromatic agent, the orthochromatic agent contained in an amount of 0.1 to 10 ppm by mass, wherein as measured at an optical path length of 1 cm with respect to a chloroform solution of 20 mg/liter concentration, the maximum absorption wavelength of absorption spectrum in a region of 380 to 780 nm wavelength is in the range of 540 to 600 nm, and wherein as measured at the optical path length of 1 cm with respect to the above chloroform solution, the ratios of light absorbances A400, A500, A600 and A700 of visible light spectrum at 400 nm, 500 nm, 600 nm and 700 nm wavelengths, respectively, to the light absorbance Amax of visible light spectrum at the above maximum absorption wavelength satisfy the relationships: 0.00 <= A400/Amax <= 0.20, 0.10 &LE; A500/Amax <= 0.70, 0.55 &LE; A600/Amax <= 1.00, and 0.00 <= A700/Amax <= 0.05.</p> |
