Process for the production of cellulosic moulded bodies

Details Process for the production of cellulosic moulded bodies Process for the production of cellulosic moulded bodies

1998-12-28

2000-12-26

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264187, 2642104, 2642107, 2642896, 2642902, B29C 6720

Patent

active

061654019

ABSTRACT:
The invention relates to a process for the manufacture of cellulosic flat films and cellulosic membranes in the form of flat membranes whereby a solution of cellulose in an aqueous tertiary amine oxide is moulded in film form using an extrusion nozzle which has an oblong extrusion gap and is led into a precipitation bath via an air gap whereby the cellulosic flat film is formed in the precipitation bath, characterized in that the cellulosic flat film is stretched in the transverse direction after entering the precipitation bath.

REFERENCES:
patent: 2179181 (1939-11-01), Graenacher et al.
patent: 3657115 (1972-04-01), Manjikian et al.
patent: 4246221 (1981-01-01), McCorsley, III
patent: 4354938 (1982-10-01), Walch et al.
patent: 5277857 (1994-01-01), Nicholson et al.
patent: 5330567 (1994-07-01), Zikeli et al.
patent: 5607639 (1997-03-01), Zikeli et al.
Handbook of Plastics II, Theorie des Reckvorgangs, Hanser-Verlag, pp. 261-270 (1986).
Eberhard Straude, Membranen und Membranprozesse, VCH Vers., pp. 18-19 (1992).

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