Method of producing thermoplastic polymer film

Details Method of producing thermoplastic polymer film Method of producing thermoplastic polymer film

1989-09-08

1991-07-09

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 24, 264216, 4251748E, B29C 3942

Patent

active

050303937

ABSTRACT:
A method for producing a thermoplastic polymer film is disclosed. A melted thermoplastic polymer is extruded from a die onto a rotary cooling body, static electricity is impressed on the rotary cooling, body through a main electrode provided close and parallel to the cooling body and the film is solidified by cooling which method is characterized by providing at least one ungrounded auxiliary electrode composed of a conductive material unconnected to the main electrode and disposed at least on one side of the main electrode parallel to the rotary cooling body.

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patent: 4268464 (1981-05-01), Yoshino et al.
patent: 4534918 (1985-08-01), Forrest, Jr.
patent: 4650411 (1987-03-01), Hassmann et al.

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