| 摘要 |
PCT No. PCT/JP99/01420 Sec. 371 Date Dec. 27, 1999 Sec. 102(e) Date Dec. 27, 1999 PCT Filed Mar. 19, 1999 PCT Pub. No. WO99/47735 PCT Pub. Date Sep. 23, 1999A polyester filament yarn produced by a melt-spinning a mixture of a polyester resin with 0.4 to 4.0 weight % of filament elongation-enhancing agent particles and taking up the filament yarn at a speed of 2500 to 8000 m/minutes, having an increase in residual elongation of 50% or more and exhibiting an improved winding performance, wherein the filament elongation-enhancing agent particles satisfies the requirements (a), (b) and (c): (a) the particles have a thermal deformation temperature of 105 to 130 DEG C., (b) provided that the polyester filaments have a non-hollow circular cross-section, the distribution density of the particles is maximized in an annular area between two concentric circles around the center of the cross-section, of which the two concentric circles have radiuses corresponding to +E,fra 1/3+EE and +E,fra 2/3+EE of the radius of the cross section, respectively; and (c) the number of the particles appearing on the filament surfaces is 15 particles/100 mu m2 or less. |
