A process for producing a membrane electrode assembly for fuel cells containing
a polymer electrolyte membrane having a first and a second surface parallel to
each other. The first surface forms a firm composite with a first catalyst layer
and a first water repellent gas distribution layer and said second surface form
a firm composite with a second catalyst layer and a second water repellent gas
distribution layer. The catalyst layers are prepared by using inks containing electrocatalysts,
one or more solvents, proton-conducting ionomer and optionally water repelling
agents and pore-forming agents. In the process the two catalyst layers are applied
to or contacted with the respective surfaces of the polymer electrolyte membrane
successively, wherein during the application or contacting process to one surface
always the opposite surface of the membrane is supported.