Manufacturing Method of Atmospheric Pressurized Salt-type Ultrafast Emission Polyester

摘要

The present invention relates to a process for producing an atmospheric pressure brominated copolymer polyester capable of dyeing with a heart color using a disperse dye at atmospheric pressure and a super high speed spinning method of the copolymer polyester. The process comprises the steps of adding trimellitic anhydride And then a polyalkylene glycol having an average molecular weight of 400 to 4,000 is added at the end of the esterification reaction or in the early stage of the polycondensation reaction to obtain a repeating unit;(Wherein x and y are independent and integers of 60 X 150 and 2 Y 45) are randomly linearly bonded to each other in the poly ethylene terephthalate-trimellitic anhydride-The present invention relates to atmospheric-pressure-type polyesters that are spun at a high speed, particularly when the polymer is spinning at a high speed, the distance between the surface of the spinneret and the chamber is set to less than 60 mm and the temperature of the bottom heater is 270 to 300 C. /RTI ;The copolyester produced according to the present invention is a useful invention having an excellent workability and dyeability because it can be dyed in a heart color using a disperse dye without using a carrier under the condition of 98C.