Electrostatic pinning of extruded polyamide film

Details Electrostatic pinning of extruded polyamide film Electrostatic pinning of extruded polyamide film

1979-08-16

1981-05-19

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 28, 4251748E, B29D 702, B29D 724

Patent

active

042684641

ABSTRACT:
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 product 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.

REFERENCES:
patent: 3223757 (1965-12-01), Owens et al.
patent: 3361728 (1968-01-01), Coen et al.
patent: 3427686 (1969-02-01), Busby
patent: 3655307 (1972-04-01), Hawkins
patent: 4111625 (1978-09-01), Remmington et al.

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