MANUFACTURING PROCESS OF POLYESTER FILAMENT YARN

摘要

adding 1-8 wt.% of the heat-spinnable liquid crystal polymer, having the following formula, to the polyester polymer, whose whole repeat unit among the molecular chain is composed of more than 90 mol% of polyethylene terephthalate, and intrinsic viscosity is more than 0.8; high-speed spinning with the speed of more than 3000 mpm; drawing and heat-treating. The method can prevent the pyrolysis of the polyester polymer during spinning process, and makes the spinning of the polymer of high molecular weight possible due to the role of the heat-spinnable polymer of enhancing the spinnability.