| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a copolyester pellet capable of manufacturing the amorphous copolyester pellet having a low moisture content with sufficient workability, and a manufacturing apparatus preferably used in the manufacturing method.SOLUTION: After a melt polymer comprising the copolyester in which a main dicarboxylic acid component is terephthalic acid, a main diol component is ethylene glycol and 5-50 mol% of isophthalic acid is contained as a copolymerization component is extruded in a strand 9 form and is cooled and solidified, it is cut to manufacture the pellet 11. In this case, after the melt polymer is extruded into cooled water of a temperature of 30°C or lower in the strand 9 form and is cooled, it is cut and continuously subjected to heat treatment in hot water of 50-100°C for 1-60 seconds. The moisture content of the pellet 11 after the heat treatment is made to 500 ppm or less. |
