MANUFACTURE OF ADMIXTURE FOR POLARIZATION ELECTRODE FOR ELECTRICAL DOUBLE-LAYER CAPACITOR AND MANUFACTURE THEREOF

PROBLEM TO BE SOLVED: To achieve sufficient strength and increase the capacity per unit volume by agitating and mixing a fluororesin containing carbon fine particle, pressurizing the mixture, and further agitating and mixing the pressed substance. SOLUTION: Powder coconut shell coal nd carbon black as carbon fine particles and polytetrafluoroethylene powder as resin-containing fluorine are thrown and mixed into a V-shaped blender. In this case, agitation mixing time T is set to [B+(B×Z)] (Z: a constant ranging from -0.5 to 10), while B in that the sample of a mixture is sampled at each specific time after starting agitation and is changed into a sheet by the rolling of a roll with the same surface speed of the roll, the strength of the sheet is measured, strength at each time is observed, and time when the maximum strength appears is set to B. The obtained admixture is pressurized and rolled by the roll with the same surface speed ratio of the roll to obtain the sheet. Then, the obtained sheet is thrown into the V-shaped blander again, is crushed and mixed as the admixture.