| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing regenerated polyester resin flakes which improves the cleanliness of the flakes by removing foreign matter mixed in the flakes, especially foreign matter adherent to the surfaces of the flakes, efficiently. SOLUTION: In the method for producing the regenerated polyester resin flakes as commercial goods by crushing PET bottles into flakes and cleaning the flakes, a process in which the flakes are cleaned by using ultrasonic waves is included.</p> |
