Process for producing synthetic fibers for use in paper-making

Details Process for producing synthetic fibers for use in paper-making Process for producing synthetic fibers for use in paper-making

1977-10-31

1980-07-08

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By impinging or atomizing with gaseous jet or blast

162157R, 264 14, 264140, 425 7, B22D 2308

Patent

active

042117372

ABSTRACT:
There is disclosed an improvement in the production of microfibers or fibrils of synthetic thermoplastic polymeric materials by flash-spinning solutions, emulsions or suspensions of the synthetic polymers in solvents, under the action of a high-speed jet of gaseous or vaporous fluid having an angular direction with respect to the solution, emulsion or suspension being flash-spun. The improvement consists in causing the fluid jet to expand through a nozzle (or duct) of the convergent-divergent type and in extruding the polymer solution, emulsion or dispersion under flash conditions at an angle towards the fluid jet in expansion in the divergent portion of the nozzle.

REFERENCES:
patent: 2297726 (1942-10-01), Stephanoff
patent: 2317875 (1943-09-01), Drell
patent: 2336745 (1943-11-01), Mannings
patent: 2413420 (1946-12-01), Stephanoff
patent: 2929436 (1950-03-01), Hampshire
patent: 3785918 (1974-01-01), Kawar et al.
patent: 3794731 (1974-02-01), Dannert et al.
patent: 3874886 (1975-04-01), Levesque et al.
patent: 3885014 (1975-05-01), Fukada et al.
patent: 3885940 (1975-05-01), Levesque et al.
patent: 4001357 (1977-01-01), Walz et al.

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