Flash fibrillation process

Details Flash fibrillation process Flash fibrillation process

1977-09-21

1980-01-15

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By extrusion spraying or gravity fall through orifice

264 403, 264205, 425 6, 425146, 425149, D01F 700

Patent

active

041838815

ABSTRACT:
The stability of a flash fibrillation process for converting thermoplastics materials into fibrils by flash extruding a hot pressurized dispersion of thermoplastics material in liquid through an orifice is improved by inserting a pressure-responsive valve in the orifice which ensures the dispersion is at a specified minimum pressure before it is extruded through the orifice. The minimum pressure should be sufficient to ensure the liquid does not volatilize prior to its extrusion through the outlet.

REFERENCES:
patent: 3227794 (1966-01-01), Anderson et al.
patent: 3461193 (1969-08-01), Gilardi
patent: 3478389 (1969-11-01), Bradley et al.
patent: 3651194 (1972-03-01), Bohrer
patent: 3879519 (1975-04-01), Woodell

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