Abstract: A problem of the present invention is to provide a solid polymer membrane electrode capable of obtaining electrolyzed hydrogen water in which an increase of the pH is suppressed and which has a sufficient dissolved-hydrogen amount. The present invention is concerned with a solid polymer membrane electrode for generating electrolyzed water, wherein the solid polymer membrane electrode includes a solid polymer membrane and catalyst layers containing a platinum group metal and provided on the back and front of the solid polymer membrane; and the solid polymer membrane is a hydrocarbon-based cation exchange membrane and has an ion exchange capacity per unit area of 0.002 mmol/cm2 or more and 0.030 mmol/cm2 or less.

Abstract: A problem of the present invention is to provide a solid polymer membrane electrode capable of obtaining electrolyzed hydrogen water in which an increase of the pH is suppressed and which has a sufficient dissolved-hydrogen amount. The present invention is concerned with a solid polymer membrane electrode for generating electrolyzed water, wherein the solid polymer membrane electrode includes a solid polymer membrane and catalyst layers containing a platinum group metal and provided on the back and front of the solid polymer membrane; and the solid polymer membrane is a hydrocarbon-based cation exchange membrane and has an ion exchange capacity per unit area of 0.002 mmol/cm2 or more and 0.030 mol/cm2 or less.

Abstract: [Problems] To provide an ion-exchange membrane using an inexpensive nonwoven fabric sheet as a base sheet, featuring excellent properties such as strength, dimensional stability and shape stability, effectively suppressing undulation when it is brought into contact with the electrolyte, and having a low membrane resistance and stable properties. [Means for Solution] An ion-exchange membrane comprising a nonwoven fabric sheet 1 and an ion-exchange resin coating 3 formed on one surface of the nonwoven fabric sheet 1, the nonwoven fabric sheet 1 having a fiber layer structure that includes long filament layers 5 of a fiber diameter of 8 to 30 ?m on both surfaces thereof and an extra-fine filament layer 7 of a fiber diameter of not more than 5 ?m as an intermediate layer formed by melt-adhesion of fibers between the long filament layers 5.

Abstract: A composite hydrophilic membrane comprising a very thin semipermeable hydrophilic membrane containing a sulfonic group and a polyethylenic microporous membrane containing sulfonic group. This hydrophilic membrane has specially high permeation rate of water and excellent separation ability.The composite hydrophilic membrane is manufactured by a method which comprises fusing a very thin membrane containing an ethylenic copolymer onto the surface of a polyethylenic microporous membrane or a polyethylenic membrane capable of being converted into a microporous membrane thereby forming a composite film, converting the resin film prior to and/or during and/or after sulfonation into a microporous membrane, and causing the composite film to react with a sulfonating agent. This method permits easy and efficient production of the composite hydrophilic membrane.