REINFORCING MATERIAL FOR PROTON-CONDUCTIVE FILM, PROTON-CONDUCTIVE FILM MANUFACTURED USING THE SAME, AND FUEL CELL

摘要

A reinforcing material (1) for a proton-conductive film comprising a non-woven fabric (11) containing a glass fiber and inorganic particles (12) carried on the non-woven fabric (11). When the percentage of the volume determined by subtracting the volume occupied by the glass fiber from the volume occupied by the reinforcing material to the volume occupied by the reinforcing material is defined as an apparent void ratio, at least some of the inorganic particles have a particle diameter equal to or larger than the thickness of the reinforcing material given when the reinforcing material is deformed to such an extent that the apparent void ratio becomes 90% by volume. The content of the inorganic particles having such a particle diameter may be 2 to 10% by mass.