To provide a method for manufacturing a thermoplastic resin sheet, quantitatively evaluating the index related to the close contact force of the thermoplastic resin sheet and the surface of a moving cooling body in a static electricity applying casting method, bringing the thermoplastic resin sheet into close contact with the moving cooling body regardless of the kind of a thermoplastic resin or a production condition without involving air, generating no spark discharge and capable of enhancing productivity.
In the method for manufacturing the thermoplastic resin sheet by applying charge to a molten resin sheet and bringing the charged sheet into close contact with the surface of the moving cooling body to quench and solidify the same, charge is injected in the resin sheet so that the maximum value of charge density in the thickness direction of the thermoplastic resin sheet becomes 5 μC/cm3 or more.
NAKAJIMA HIROKI
TORIKAI JUN
