A gas diffusion electrode substrate has an electrically conductive porous substrate and a microporous layer-1 on one side of the electrically conductive porous substrate. The microporous layer-1 includes a dense portion A and a dense portion B. The dense portion A is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm. The dense portion A has a thickness of 30% to 100% with respect to the thickness of the microporous layer-1 as 100% and a width of 10 m to 200 m. The dense portion B is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.

Provided is a structure in which an inserted article is easily inserted and a product is easily released from a die after molding. The structure includes a positioning mechanism which is vertically arranged on one split die, includes a positioning pin having a tapered distal end, and positions the inserted article by engaging the inserted article with the positioning pin, a stop mechanism that has a spring means assembled with the one split die and a stopper portion held by the spring means, and temporarily stops movement of the other split die when the other split die comes into contact with the stopper portion at the time of mold clamping, and a pressing mechanism that has a spring assembled with the other split die, a pusher pin, a spring assembled with the one split die, and a pusher pin, and elastically presses the inserted article by the pusher pin.

A fuel cell includes an electrolyte membrane, first and second electrode layers disposed on first and second surfaces of the electrolyte membrane, respectively, the second surface being opposite to the first surface. One of the first and second electrode layers is an anode electrode layer and the other is a cathode electrode layer. Additionally, first and second gaskets are disposed on the first and second surfaces of the electrolyte membrane, respectively, to be adjacent to an edge of the electrolyte membrane. The first electrode layer includes a first main electrode layer disposed on the first surface of the electrolyte membrane and inside the first gasket and a first sub-electrode layer having a first portion inserted between the first main electrode layer and the electrolyte membrane and a second portion inserted between the first gasket and the electrolyte membrane.

A resin frame equipped membrane electrode assembly includes a membrane electrode assembly and a resin frame member around an outer peripheral portion of the membrane electrode assembly. An inner end of the resin frame member is joined to an electrolyte membrane. In the state before the inner end is joined to the electrolyte membrane, the inner end is narrowed inward in a manner that a surface of the inner end adjacent to the electrolyte membrane gets closer to a surface of the inner end opposite to the electrolyte membrane.

A device for manufacturing a fuel cell component is provided. The device includes a movement device configured to load a gas diffusion layer from a magazine when the gas diffusion layer is loaded to an inlet of a conveyor and unload the gas diffusion layer from an outlet side of the conveyor. An adhesive layer forming device that is disposed over the conveyor forms an adhesive layer in an edge region of the gas diffusion layer. A drying device is configured to dry the adhesive layer formed in the gas diffusion layer. An inspection vision is configured to detect an image of the gas diffusion layer that the adhesive layer is formed. Additionally, a controller operates the movement device, the adhesive layer forming device, and the drying device and configured to use the image to determine a shape of the adhesive layer formed in the gas diffusion layer.

Disclosed are a heat conductive sheet including a resin and a particulate carbon material, and having a thermal resistance value under a pressure of 0.05 MPa of 0.20 C./W or less, a heat dissipation device including the heat conductive sheet interposed between a heat source and a heat radiator, and a method of producing a heat conductive sheet.

A manufacturing device of a membrane-electrode assembly for a fuel cell is provided. The manufacturing device includes an electrolyte membrane feeding unit forming a first and second ionomer bases impregnated at both surfaces of a reinforcing layer and unwinding an electrolyte membrane wound in a roll type supplied in a predetermined transporting path. A first patterning unit is disposed at a rear side of the electrolyte membrane feeding unit and patterns a first ionomer protrusion pattern layer on the first ionomer base and a second patterning unit is disposed at the rear side of the first patterning unit and patterns a second ionomer protrusion pattern layer on the second ionomer base. A transfer unit is disposed at the rear side of the second patterning unit and couples a catalyst electrode layer on the first and second ionomer protrusion pattern layers by a roll laminating method.

A membrane electrode assembly is provided that includes a polymer electrolyte membrane and a catalyst layer provided on a surface of the polymer electrolyte membrane. The catalyst layer comprises catalyst particles and an ionomer film surrounding each of the catalyst particles. The ionomer film has an oxygen permeability of approximately 6.010.sup.12 mol/cm/s to 15.010.sup.12 mol/cm/s at 80 C. and a relative humidity of approximately 30% to 100%.

An intermediate material of a thermoplastic prepreg for a fuel cell separation plate comprises a hydrophobic thermoplastic resin film and a fiber base. The hydrophobic thermoplastic resin film has a degree of crystallization of 1 to 20%, a thickness of 3 to 50 m, and (iii) a content of an electroconductive material of 1 to 20 wt. %. The film is laminated on at least one surface of the fiber base. The thermoplastic prepreg for a fuel cell separation plate is manufactured by pressurizing the thermoplastic prepreg intermediate material at a temperature higher than the melting point of the hydrophobic thermoplastic resin film. A fuel cell separation membrane manufactured using the thermoplastic prepreg intermediate material and thermoplastic prepreg is thin and light-weight, and have a good durability.

There is provided a technique of reducing the possibility of the occurrence of wrinkles in the process of bonding strip-shaped members to each other. A long strip-shaped first member is conveyed in a longitudinal direction of the first member. A width of a long strip-shaped second member in the shorter direction of the second member is larger than a width of the first member in a shorter direction of the first member. The second member is placed such that respective ends in a shorter direction of the second member are freed. The second member is bonded to the first member being conveyed, such that the shorter direction of the first member is aligned with the shorter direction of the second member and that respective ends in the shorter direction of the first member are placed between the respective ends in the shorter direction of the second member. The second member bonded to the first member is then conveyed along with the conveyed first member.