spun yarn was subsequently drawn on a panel similar to fig2 with roll 1 maintained at 90 u00b0 c the yarn drawn 1 5 1 to unheated rolls 2 3 with a normal ambient temperature of 40 u00b0 50 u00b0 c then drawn 1 6 1 from rolls 2 3 to rolls 5 6 maintained at 200 u00b0 c the yarn was then relaxed to rolls 7 8 at 1 to 1 5 percent rolls 7 and 8 had an operating temperature of 150 u00b0 c the drawn yarn was taken up at 2 98 km min polymer thruput for the two ends was 85 lbs hour the drawn yarn was 1004 denier 3 3 dpf 17 5 lbs breaking strength 7 9 g d tenacity 10 6 percent ultimate elongation 3 9 g d lase 5 5 5 e 4 5 and 9 2 percent fs the sum e 4 5 fs is 14 percent the undrawn yarn birefringence u03b4n u was 0 026 and iv was 0 92 dl g r f was 24 u00d7 10 3 the yarn produced in this example while produced at a moderate spinning take up speed usually associated with standard yarn products is then shown to have that enhanced dimensional stability associated with substantially higher spinning speeds in the prior art r f and r e were 24 u00d7 10 3 and 19 u00d7 10 2 respectively an ultradimensionally stabilized pet was produced in the following manner pet polymer was pumped into a spinneret containing multiple orifices each orifice of 0 027 inch diameter d 0.