Optimization of production process of 83 dtex/36 f profiled full dull polyester drawn yarn by melt direct spinning
A 83 dtex/36 f profiled full dull polyester drawn yarn was prepared by melt direct spinning and online full dull mas-terbatch addition technology.The drying and melt extrusion of full dull masterbatch,spinning and drawing formation process were optimized to solve the problems of broken ends and fuzziness in production.The results showed that the moisture content of full dull masterbatch was lower than 30 μg/g after drying at 145℃for 12 h;the temperature increasing patterns in each area of the screw could reduce the melt viscosity drop during the melting and extrusion of masterbatch;the spinnability was satisfying when the process conditions were as followed:melt conveying pipeline temperature 283℃,spinning box temperature 292℃,calm zone height 60 mm,cross air blow speed 0.55 m/s,drawing temperature 72℃,heat setting temperature 140℃,first draw ratio 1.1,second draw ratio 1.92 and winding speed 4 500 m/min;and the broken ends and fuzziness were considerably depressed,the production stability was greatly improved,and the product quality met the superior grade specified in FZ/T 54105-2018 Full Dull Polyester Drawn Yarn,with a breaking strength of 3.71 cN/dtex,elongation at break of 29.8%and 2.1%titanium dioxide in the fiber by mass fraction under the above process conditions.
polyester drawn yarnfull dullprofiled fibermelt direct spinningproduction process
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