Film extrusion method

Details Film extrusion method Film extrusion method

1974-01-14

1976-09-07

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264188, 264202, D01F 200

Patent

active

039794970

ABSTRACT:
A method for making a film in which bead formation along opposite longitudinal edges thereof is at least minimized by extruding into a setting bath a generally flat stream of coagulable solution with the longitudinal edges of such stream each having a concave contour and being free to deform into a rounded contour under the influence of the interfacial surface tension forces acting upon the extruded stream of coagulable solution during the setting thereof.

REFERENCES:
patent: 2923971 (1960-02-01), Nelson
patent: 2982995 (1961-05-01), Groleau
patent: 3694132 (1972-09-01), Bunte et al.
patent: 3706518 (1972-12-01), Bunte et al.
patent: 3797987 (1974-03-01), Marion

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