A process for producing a membrane-electrode assembly for solid polymer electrolyte
fuel cells, including providing a die having an inlet for introducing coating liquids,
a linear exit for discharging the coating liquids, and at least one guide partition
wall for partitioning the inlet into compartments extending to the linear exit
and slanted relative to the direction in which a substrate facing the linear exit
moves relatively to the die, introducing the coating liquids from the inlet, and
passing the coating liquids through the compartments separately, and moving at
least one of the die and substrate so that the substrate relatively moves at substantially
right angles to the longitudinal direction of the linear exit of coat the substrate
with the coating liquids and form catalyst layers.
