| 摘要 |
<p>Disclosed is a method for producing a crystallized polyester, which comprises the crystallization step of applying a shear and/or a pressure to a polyester selected from an aliphatic polyester and a polyalkylene terephthalate at a temperature of (Tm - 70°C) to (Tm + 20°C), where Tm is a melting point of the polyester, thereby converting the polyester into a state having a crystallinity of 10% or more and fluidity. An object of the present invention is to provide a method for producing a polyester resin which has excellent processability and also has satisfactory crystallization properties.</p> |
