| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a monofilament for a high-mesh and high-modulus screen gauze which hardly forms scum at weaving. Ž<P>SOLUTION: The core-sheath type conjugate polyester monofilament for the screen gauze satisfies the following requirements (A) to (F): (A) sheath-side polyester is a copolyester obtained by copolymerizing 0.5-25 mol% isophthalic acid and/or sulfoisophthalic acid metal salt based on the whole acid component of the polyester; (B) the strength at the maximum point of a raw thread after moist heat treatment of the monofilament, the strength at 15% elongation, and the elongation at the maximum point are 5.0-7.5 cN/dtex, 4.0-7.0 cN/dtex, and 20-40%, respectively; (C) the intrinsic viscosity of the core-side polyester is 0.70-1.00 dL/g; (D) the intrinsic viscosity of the sheath-side polyester is 0.40-0.55 dL/g; (E) the birefringence of the sheath-side polyester is 0.03-0.14; and (F) the core/sheath area ratio in the cross-section orthogonal to the fiber axis is from 50:50 to 95:5. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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