Method for producing polyester fiber by ultra high speed spinning method

摘要

The present invention is to produce a polyester fiber by the ultra-fast spinning method with a spinning speed of 5.500m / min or more, by heating the thread yarn compressed in the spinneret by a non-contact heater that satisfies the following equation of the cylinder (linear) form To provide a method for producing a polyester fiber characterized in that it has a non-shrinkage rate (7 ~ 8%) of the gentleman level, the polyester fiber produced by the method according to the present invention is general even if manufactured by the ultra-fast spinning method Since it has a non-shrinkage rate of the stretched yarn level, the fabric density does not decrease after weaving, so it can be manufactured into a high quality fabric. Heater radius (mm) = A x single-diameter In the above formula, A is the experimental constant, the first heater; A = Experimental constant, the second heater having a range of 15-20; Experimental constant having a range of A = 40-50, single yarn diameter (0.54mm) = 75d / 36f (15μ) x number of filaments (36).