THE PRODUCTION METHOD OF POLYESTER YARN ? DIPPED-CORD HAVING A FLAT CROSS-SECTION

摘要

This invention relates to a process for the manufacture of polyester yarns and dipped cords having a flat cross-section. In particular, the present invention can increase the line utilization by giving dipped cord strength and minimize voids between the filaments of the yarn after weaving continuous and, also as a way to reduce the production cost by lowering the amount of the adhesive composition, using a direct spinning drawing process A method for producing a polyester yarn for a tire cord, and the inherent viscosity is at least 0.8 / g of polyester chips for solid state polymerization is 270 to 300 detention of the liquid polymer melt at the spinning temperature of 1.2 to 15 in custody pyeonpyeongbi sikimyeo ejected through, the spinning speed is 2000 to 3500 m / min, relates to a process for the production of polyester yarn having a flat cross section, characterized in that the stretching magnification of 1.4 to 3.4 times that.