Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1974-02-06
1976-04-13
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
Work is organic material
264 90, 264 95, 264178R, 264210R, 264237, 425 71, 425326R, B29D 720
Patent
active
039504670
ABSTRACT:
A method for shaping a tubular film in a downward and wet manner is provided in which an extruded tubular film is coagulated in contact with a coagulation liquid which flows down along the inside surface of a cylindrical composite perforated wall composed of a cylindrical perforated wall and cylindrically piled up circular rings of coiled wire provided in a single layer and in contact with the inner surface of said cylindrical perforated wall, provided in a negative pressure chamber connected to the lower part of a coagulation liquid-supplying pool; in this coagulation, coagulation liquid is fully utilized by mixing with a reflux coagulation liquid formed when a part of coagulation liquid once flows out through said wall and is collected in a plurality of coagulation liquid-collecting weirs provided around the outer surface of said wall, and then flows again through said wall to the inside thereof; and said film is drawn downward while being supported on the inner surface of said wall by friction due to suction under negative pressure and taken up by pinch rollers.
REFERENCES:
patent: 3218380 (1965-11-01), Euling et al.
patent: 3532780 (1970-10-01), Kakutani et al.
patent: 3600488 (1971-08-01), Yazawa
Kurihara Kazuhiko
Narikawa Kenichi
Yazawa Hirosi
Yazawa Masahide
Philpitt Fred
Polymer Processing Research Institute Ltd.
Thurlow Jeffery R.
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