| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration of IV value, in a twin screw extruder 10 using flakes obtained by pulverizing a market-recovered polyester resin molded product as a reused material, by further improving the moisture removing efficiency from the reused material, and a melt extrusion method of regenerated polyester resin using the same.SOLUTION: In the twin screw extruder 10 which uses flakes obtained by pulverizing market-recovered polyester resin molded products as the reused material, and melts and extrudes regenerated polyester resin, an air blowing port 33 is provided in an area where the material is not perfectly melted in a cylinder 30, and a gas suction port 34 is provided in an area in the vicinity of a hopper 10 of the cylinder 30. Drying air, for example, is injected through the gas blowing port 33, and sucked through the gas suction port 34. The drying air absorbs moisture contained in the material in the process of passing through the material to reduce the moisture content of the material. Thus, regenerated polyester resin with a less reduction rate of IV value can be obtained. |
