Method and apparatus for producing para-aramid pulp and pulp pro

Details Method and apparatus for producing para-aramid pulp and pulp pro Method and apparatus for producing para-aramid pulp and pulp pro

1991-07-01

1993-04-13

Ryan, Patrick J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428359, 428395, 1621573, D02G 300

Patent

active

052021840

ABSTRACT:
A method for producing para-aramid pulp includes forming a liquid, actively-polymerizing solution and subjecting the solution to orienting flow which produces an optically anisotropic liquid solution with polymer chains oriented in the direction of the flow. When the solution has a viscosity sufficient to maintain the orientation of the polymer chains, the solution is incubated until it gels. The gel is cut transversely at intervals and para-aramid pulp is isolated from the gel. Para-aramid pulp produced by the process can be used similarly to pulp produced from spun fiber.

REFERENCES:
patent: 3068188 (1962-12-01), Beste et al.
patent: 3079219 (1963-02-01), King
patent: 3884881 (1975-05-01), Bice et al.
patent: 4081430 (1978-03-01), Minami et al.
patent: 4118374 (1978-10-01), Yamazaki et al.
patent: 4297478 (1981-10-01), Rochina et al.
patent: 4308374 (1981-12-01), Vollbracht et al.
patent: 4836507 (1989-06-01), Yang
patent: 4959453 (1990-09-01), Sweeny

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