Production of lead powder for tube electrodes

Details Production of lead powder for tube electrodes Production of lead powder for tube electrodes

1976-12-17

1978-02-07

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

429140, 429217, 429238, H01M 404

Patent

active

040719464

ABSTRACT:
An improvement in the preparation of dry lead powder mixtures for the production of tube electrodes for lead storage batteries to reduce the dust binding problem during filling of the tube electrodes is disclosed. A small amount (0.1 to 3 weight percent) of polytetrafluoroethylene (PTFE) is mixed with the lead powder, the mixture is heated and shear stresses are applied thereto sufficient to convert substantially all of the PTFE in the mixture to fibrous form. The resulting mixture can be utilized in a dry powder process for the filling of tube electrodes with a substantial reduction or elimination of the dust binding problem.

REFERENCES:
patent: 3060254 (1962-10-01), Urry
patent: 3194684 (1965-07-01), Wells
patent: 4025701 (1977-05-01), Sundberg

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