| 摘要 |
PURPOSE:To obtain a nonblocking chipped polyester resin composition by mixing PET with a specified copolyester in a specified ratio, melting the mixture, cooling the melt, forming the solid product into chips, roughening the surfaces of the chips and vacuum-drying them. CONSTITUTION:A copolyester resin comprising dicarboxylic acid component units (A) comprising 20-100mol% isophthalic acid component units and 80-0mol% terephthalic acid component units, dihydroxy compound component units (B) comprising 5-90mol% dihydroxyethoxyresorcinol component units and 95-10mol% ethylene glycol component units and 0.05-1pt.mol, per 100pts.mol component A, polyhydroxy compound component units having at least three hydroxyls is produced. 90-60wt.% this resin is mixed with 10-40wt.% polyethylene terephthalate resin, and the mixture is melted. The melt is cooled to form chips, which are agitated under a shearing force to roughen their surfaces, and the roughened chips are dried at a temperature >=100 deg.C in a vacuum to obtain a polyester resin composition. |
