| 摘要 |
This extrusion pelletizer (1) for polycarbonate resins is equipped with an extruder (2), a cooler (3), and a cutter (4). The extruder (2) is equipped, at the cylinder fore end part (21), with a first adaptor (22), a polymer filter unit (23), a second adaptor (24), and a die head (25). The polymer filter unit (23) is equipped inside with a plurality of rod-shaped filter elements. The temperature of the second adaptor (24) is set so as to be lower than the temperature of the polymer filter unit (23). The cooler (3) and the cutter (4) are disposed in an atmosphere which has an air cleanliness as provided for in JIS B 9920 of any one of class 1 to class 7. |
