초록 ▼

In the continuous manufacture of plastic-cohered gas diffusion electrodes, and particularly air electrodes, in the form of thin foils, a dry mixture of PTFE and active carbon powder is subjected, during the mixing process in a paddle mixer, to the additional intensive influence of rapidly rotating c

In the continuous manufacture of plastic-cohered gas diffusion electrodes, and particularly air electrodes, in the form of thin foils, a dry mixture of PTFE and active carbon powder is subjected, during the mixing process in a paddle mixer, to the additional intensive influence of rapidly rotating cutting knives. The degree of subdivision and homogeneity of the dry mixture is thereby enhanced to such a degree that, in the finished electrode tape, the mass does not exhibit nonuniform thickening.

대표청구항 ▼

The process for manufacture of a plastic-cohered active carbon layer for gas diffusion electrodes, particularly air electrodes utilizing a paddle mixer and a cutting head with sharp knives, said process comprising subjecting a dry mixture of active carbon powder and polytetrafluoroethylene powder wh

The process for manufacture of a plastic-cohered active carbon layer for gas diffusion electrodes, particularly air electrodes utilizing a paddle mixer and a cutting head with sharp knives, said process comprising subjecting a dry mixture of active carbon powder and polytetrafluoroethylene powder while it is still in the paddle mixer, before rolling or pressing, additionally to an intensive subdividing influence of the rotating sharp knives of the cutting head, whereby the polytetrafluoroethylene temporarily evaporates, at least partially, and deposits upon the carbon powder.