Electroconductive structure, manufacturing method therefor, and separator for fuel cell
a technology of electroconductive structure and manufacturing method, which is applied in the direction of non-metal conductors, cell components, sustainable manufacturing/processing, etc., can solve the problems of increasing the cost, the method of substantially changing the overall temperature of the mold, and the inability to obtain sufficient electrical conductivity, so as to achieve superior conductive and heat radiation characteristics
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[0113]Examples of the present invention will hereinafter be described in further detail, but it is not restricted thereto. A method for measuring physical properties of a molded body will first be described hereinafter. The volume resistivity is measured by a four-pin probe method in conformity with JIS K7194.
[0114]The resistivity in a thickness direction is measured by a four-pin probe method as shown in FIG. 1. More specifically, four test pieces (50 mm×50 mm×2 mm) are stacked and sandwiched between two gold-coated brass plates to be pressurized uniformly at 2 MPa, and then a constant current of 1 A is applied between the gold-coated brass plates in the penetration direction to measure the voltage and thereby obtain the resistance (R1). Two test pieces are stacked similarly and sandwiched between gold-coated brass plates, and then the same measurement as above is made to obtain the resistance (R2). Further, the difference between the resistances (R1 and R2) is multiplied by the co...
examples 1 to 5
[0130]The primary materials according to the compositions shown in Tables 1 and 2 were kneaded using a Laboplastmill (model 100C100 manufactured by Toyo Seiki Seisaku-Sho, Ltd.) at a temperature of 200° C. and 45 rpm for 7 minutes to obtain crystalline thermoplastic resin composite material. The composite material was placed in a mold capable of molding a flat plate of 100 mm×100 mm (the thickness varies for each physical property test item), and then pressurized and heated using a 50 t compression molding machine A (E-3013 manufactured by Nippon Engineering Co., Ltd.) at a temperature of 230° C. and a pressure of 15 MPa for 3 minutes after 3-minute preheating. Subsequently, the mold was taken out of the compression molding machine A in a hot state, and immediately pressurized using a 50 t compression molding machine B (E-3013 manufactured by Nippon Engineering Co., Ltd.), the heat treatment temperature of which was set as shown in Table 3, at a pressure of 15 MPa for 10 minutes. Th...
example 10
[0136]The composite material 5 was placed in a mold capable of molding a flat plate of 100 mm×100 mm (the thickness varies for each physical property test item), and then pressurized and heated using the 50 t compression molding machine A at a temperature of 230° C. and a pressure of 15 MPa for 3 minutes after 3-minute preheating. Then, the mold was cooled using a cooling press at a temperature of 25° C. and a pressure of 15 MPa for 2 minutes to obtain a conductive structure. The conductive structure was further inserted in a mold, and then heated and pressurized using the 50 t compression molding machine B, the heat treatment temperature of which was set to 155° C., at a pressure of 15 MPa for 120 minutes. Then, the mold was cooled using a cooling press at a temperature of 25° C. and a pressure of 15 MPa for 2 minutes to obtain the conductive structure. The results obtained in the tenth example are summarized in Table 5 below.
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Abstract
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