METHOD FOR PREPARATION OF POLYESTER FILAMENT HAVING EXCELLENT TECTILITY

摘要

preparing polyester resin made by reacting ethylene glycol and terephthalic acid, in the initial phase of which 5.0-8.3 % of isophthalic acid, estimated in terms of chip amount, and 0.01-0.1 wt.% of lithium acetate or lithium acetate hydrate are added; drying; melting; spinning and drawing which are carried out by a drawing roller of Tg+50 deg.C and a heated plate of 60-140 deg.C, so that the drawing rate is 1.5-3.5. The method improves the excessive increase phenomenon of the non-crystalling region, and the process control problem.