| 摘要 |
PROBLEM TO BE SOLVED: To provide a high hydrophilic property over a long period together with high conductivity, electrolyte corrosion resistance, airtightness, strength, moldability, swelling resistance, heat resistance, and a low cost by exposing one face of a hydrophilic nonwoven fabric integrally buried with the other face in a compact including expansion graphite and a binder to the reaction gas flowing side surface of the compact. SOLUTION: This compact A is provided with lugs 2 and channels 3 between adjacent lugs 2 on the surface of a flat plate section 1a to have an irregular cross sectional shape, and one or more kinds of various hardening resins such as expansion graphite, epoxy, polyimide, phenol, and melanin are molded by compression for a prescribed time at a prescribed temperature to form the compact A, for example. The compact A containing the expansion graphite satisfying various characteristics is fixed by hardening with one face held, a hydrophilic nonwoven fabric 4 made of fibers with a hydroxyl group has a stable hydrophilic property without being peeled off, and it covers the whole faces of the channels 3 to prevent the elution of metal ions. The apex sections of the lugs 2 are preferably exposed, and the contact resistance with both electrodes is small. |
