Patent ID: 9085833
Filing Date: 2015-07-21
Classification: B41N,B65H,D01D,D01F,D02J,Y10T

Abstract:
1. A polyester monofilament, comprising a core component of a high-viscosity polyester and a sheath component of a low-viscosity polyester, which form a core-sheath type bicomponent structure; and having a fineness of 3.0 to 13.0 dtex, a breaking strength of 6.0 to 9.3 cN/dtex, a strength of 5.0 to 9.0 cN/dtex when elongated by 10%, a wet-heat stress difference of 3.0 cN or less in a fiber longitudinal direction, and a residual torque value of 4 twists/m or less, wherein the monofilament is produced by a direct spinning-drawing process including producing a core-sheath type composite from two components of a high-viscosity polyester for a core component and a low-viscosity polyester for a sheath component, extruding a melt of the composite from a spinneret, cooling the melt to solidify it, then continuously drawing the resulting undrawn yarn, and winding the yarn.