| 摘要 |
<p>Provided is a polyester composite fiber which has a high reflectance at the wavelengths of infrared rays (e.g., 800-3,000 nm) that are readily converted to heat energy and which has coloration comparable to that of conventional polyester fibers. The polyester composite fiber is a core/sheath type composite fiber in which the core component is a thermoplastic polymer that contains 8-70 wt% sunlight-shielding substance having an average particle diameter of 0.5 µm or smaller, the sheath component is a polyester polymer containing 0.5-10 wt% heat-shielding fine particles that have an average particle diameter of 0.1 µm or smaller, are smaller than the sunlight-shielding substance, and can maintain the coloration, and the mass ratio of the core component to the sheath component is 10:90 to 30:70.</p> |
