Method to produce a polytetra-fluoroethylene diaphragm

Details Method to produce a polytetra-fluoroethylene diaphragm Method to produce a polytetra-fluoroethylene diaphragm

1980-09-22

1983-04-19

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By treating occluded solids

204266, 264127, B29D 2700

Patent

active

043805213

ABSTRACT:
The method of the present invention produces a porous, electrolyte permeable polytetrafluoroethylene diaphragm with a thickness of about 5 to about 100 mils and an average pore size of about 0.1 to about 100 microns. This diaphragm is suitable for use in an electrolytic diaphragm cell adapted to electrolytically form chlorine and an alkali metal hydroxide from an aqueous alkali chloride solution.

REFERENCES:
patent: 3281511 (1966-10-01), Goldsmith
patent: 3407249 (1968-10-01), Landi
patent: 3556161 (1971-01-01), Roberts
patent: 3661645 (1972-05-01), Strier et al.
patent: 3859402 (1975-01-01), Bintliff et al.
patent: 3890417 (1975-06-01), Vallance
patent: 4170540 (1979-10-01), Lazarz et al.
patent: 4196070 (1980-04-01), Chao et al.
patent: 4224130 (1980-09-01), Moreno et al.
patent: 4289600 (1981-09-01), Lazarz et al.

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