(JP6251782-A)      An ion exchange membrane for a fuel cell of proton exchange membrane type, which is produced from a polymer having repeating units represented by the general formula (1) and has an electric conductivity at 25 deg.C of 0.11-0.20omega-1-cm-1, a hydrogen gas permeation coefficient at 40 oC of 9.0 x 10-9-24.0 x 10-9 cc-cm/(cm2-sec.cmHg), an oxygen gas permeation coefficient at 40 oC of 5.0x1-9-11.0x10-9cc-cm/(cm2-sec.cmHg), and a moisture content of over 100 to 250 wt.%, wherein X is 0, 1 or 2; Y is 2 or 3; and L and m are each a positive number provided L/m represents a positive number of up to 10.    USE/ADVANTAGE -   The invention can provide an ion exchange membrane to be used for a fuel cell of proton exchange membrane type and having excellent performance as both diaphragm and electrolyte.    (JP6342665-A)      Ion-exchange membrane to form the solid electrolyte diaphragm of a proton exchange membrane type fuel cell consists of a fluorine gp. polymer material having repeating units of formula (I), where x = 0, 1, or 2; y = 2 or 3; L/m = positive number 0-10.    The ion-exchange membrane has an electrical conductivity of 0.11-0.30 ohm- cm- at 25 deg.C, hydrogen transmission coefft. of 9.0 x 10 power (-9) to 24.0 x 10 power (-9) cc.cm/(cm2.sec.CmHa) at 40 deg.C, oxygen transmission coefft. of 5.0 x 10 power (-9) to 11.0 x 10 power(-9) cc.cm/(cm2.sec.cm Hg) at 40 deg.C, and moisture of 100-250 wt.%.    The ion-exchange membrane pref. has moisture of 107-250 wt.%, equiv. wt. of 1100-700 g/eq., and thickness of 50-500 microns. The ion-exchange membrane is treated for swelling at 100 deg.C or above with water or water-soluble organic solvent. The ion-exchange membrane consists of the fluorine gp. polymer material having repeating units of formula (1).    USE/ADVANTAGE -   Used for the diaphragm for a proton exchange membrane type fuel cell. Improved diaphragm characteristics and good electrolyte function.    (US5449697-A)      An ion exchange membrane used for a proton exchange membrane type fuel cell comprises a repeating unit of formula (I), in which x is 0, 1 or 2, y is 2 or 3, L and m are positive numbers and L/m is 10 or less. The membrane has an electrical conductivity of 0.11-0.30 Ohm power -1 cm power -1 at 25 deg.C, and permeability coefft. to H gas of 9.0 x 10 power -1 to 24.0 x 10 power -9 cc cm/cm2 sec cmHg) at 40 deg.C, a permeability coefft. to O gas of 5.0 x 10 power -9 to 11.0 x 10 power -9 cc cm/(cm2sec cmHg) at 40 deg.C and a water content of more than 100-250 wt.%.    USE/ADVANTAGE -   Used for a proton exchange membrane type fuel cell. Has excellent performance as a diaphragm and an electrolyte.