Thin cell electromembrane separator

Details Thin cell electromembrane separator Thin cell electromembrane separator

1975-10-31

1976-11-23

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 18, 156250, 156277, 264251, 264252, 264254, 427282, 428195, 428269, 210 23H, B01D 1304, C08J 518

Patent

active

039935175

ABSTRACT:
A method is provided for fabricating separators, particularly thin cell electro-membrane separators used in electrodialysis stacks for the desalination of water. The method includes placing a master stencil or mask on top of a plastic mesh which is laid out on a rigid backing sheet and pouring massive amounts of a curable polymer such as silicone rubber through the hole pattern formed in the stencil. The polymer is then spread out to fill the pattern, the stencil removed and a cover sheet applied. The polymer is then pressed into the pores of the mesh using a roller applied against the cover sheet. The sandwich of the mesh and cover and backing sheets is placed into a pile between metallic sheets, and the pile is compressed during the curing of the polymer. The cover and backing sheets are then scupped off and the polymer impregnated mesh die cut to produce the required edge shape and flow holes.

REFERENCES:
patent: 3156563 (1964-11-01), Harrison et al.
patent: 3351689 (1967-11-01), Bushcott et al.
patent: 3520803 (1970-07-01), Iaconelli
patent: 3580841 (1971-05-01), Cadotte et al.
patent: 3657115 (1972-04-01), Manjikean et al.
patent: 3876449 (1975-04-01), Smith et al.

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