Method and system for extruding tubular foamed polymer sheet

Details Method and system for extruding tubular foamed polymer sheet Method and system for extruding tubular foamed polymer sheet

1982-12-20

1984-08-14

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264178R, 2642094, 425 67, 425325, 425817C, 425DIG2, B29D 2700, B29D 2304

Patent

active

044656491

ABSTRACT:
A process and system for the formation of a polymer foam sheet of comparatively uniform biaxially orientation and comparatively uniform dimensions prepared by extruding polymer foam so that it rides on a fluid bearing film between the point of extrusion and a point of diameter expansion of the extruding tube.

REFERENCES:
patent: 2987765 (1961-06-01), Cichelli
patent: 3426111 (1969-02-01), Simpson
patent: 3864444 (1975-02-01), Johnson
patent: 4160638 (1979-07-01), Kolossow
patent: 4352893 (1982-10-01), Johnson et al.

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