PRODUCTION OF POLYAMIDE MATERIAL SHEET

摘要

A process for production of a sheet of a polyamide material which comprises extruding the polyamide material in a melt state in the form of sheet and bringing the extruded sheet in a melt state into contact with the surface of a moving chill body for quenching to give an undrawn film, characterized in that a direct current of high voltage is applied between an electrode and the extruded sheet so as to produce a discharge in a streamer corona state onto the extruded sheet, whereby the extruded sheet is brought into tight and close contact with the surface of the moving chill body electrically grounded so as to be chilled quickly.