Selective plugging of broken fibers in tubesheet-hollow fiber as

Details Selective plugging of broken fibers in tubesheet-hollow fiber as Selective plugging of broken fibers in tubesheet-hollow fiber as

Filed on

1977-09-22

Date issued

1979-10-09

Examiner

Pavelko, Thomas P.

Patent Class

Chemistry: electrical current producing apparatus, product, and

SubClass

Current producing cell, elements, subcombinations and...

SubSubClass

Include electrolyte chemically specified and method

Other Related Categories

429104, 264 36, H01M 620

Type

Patent

Status

active

Patent number

041706951

Description

ABSTRACT:
There is disclosed a method of selectively plugging broken fibers included in a bundle of hollow fibers having open ends protruding from a tubesheet and closed ends distal from the tubesheet. The protruding open ends are immersed in a curable, fluid sealant and capillary attraction is utilized to draw the sealant into the broken fibers. The resistance to compression of the gases in the unbroken fibers is such that the sealant does not move into the latter fibers so far that they will not be open after the protruding ends are removed. The imbibed sealant is cured in place and the protruding fiber ends are cut off flush with the final surface of the tubesheet. This method is of particular value in preparing tubesheet-fiber assemblies for use in high temperature alkali metal-sulfur battery cells, wherein the hollow fibers function as an electrolyte-separator.

REFERENCES:
patent: 3499062 (1970-03-01), Hoffmann
patent: 3679480 (1972-07-01), Brown
patent: 3968192 (1976-07-01), Geary

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