To manufacture a membrane electrode assembly without warpage in a manufacturing method of the membrane electrode assembly in which diffusion layers are continuously hot-pressed on both sides of a catalyst layer with heating rollers.
In cutting out diffusion layers 50 from a long-size carbon cloth 50a, warp threads are to be cut up with a number of notches 52 cut in in a weft direction on the carbon cloth 50a. The diffusion layers 50, 50 cut out are hot-pressed on an upper and a lower catalyst layers 4 of a member 1a conveyed with the catalyst layers 4 laminated on an electrolyte membrane 3 with heating rollers 10a, 10b. Warpage caused by differences of rigidity (tensile strength) of the diffusion layers 50, 50 is cancelled out by the forming of the notches 52.
Sekiya Mitsuo
Yasushi Hayakawa
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