| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a membrane-catalyst layer assembly which is a principal constituent of a solid polymer fuel cell having long durability, a membrane-electrode assembly, and their manufacturing methods. <P>SOLUTION: In the membrane-catalyst layer assembly 1 forming a catalyst layer 3 on a base material sheet 5 and manufactured by using a catalyst layer transcription sheet 4, the membrane-catalyst layer assembly 1 has an electrolyte membrane 2, and the catalyst layer 3 transcribed and formed at a size smaller than the electrolyte membrane 2 by heat-pressing the catalyst layer transcription sheet 4 on both surfaces of the electrolyte membrane 2. A first polarizing plate 7a is arranged at an upper surface side of the membrane-catalyst layer assembly 1 formed by the electrolyte membrane 2 and the catalyst layer 3, a second polarizing plate 7b is arranged at a lower surface side of the membrane-catalyst layer assembly 1 so as to make a polarizing axis be an angle of 60-120° to the polarizing axis of the first polarizing plate 7a, and a transmission rate of light transmitting the second polarizing plate 7b is 40% or below at the time of irradiating the light from the back of the first polarizing plate 7a in an inspection zone 9 within 0.2 mm from an outer peripheral edge of the catalyst layer 3 of the electrolyte membrane 2. <P>COPYRIGHT: (C)2010,JPO&INPIT |
