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AssigneeToray Industries, Inc.
InventorsKatsuya Sode, Takashi Chida, Masamichi Utsunomiya, Toru Sugahara, Takashi Ando
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A porous carbon sheet contains carbon fiber and a binder, wherein the carbon sheet is characterized in that in a section from a plane having a 50% filling ratio closest to one surface to a plane having a 50% filling ratio closest to the other surface, when letting layer X be a layer with the largest filling ratio close to the one surface, layer Y be a layer with a filling ratio smaller than layer X close to the other surface, and layer Z be the layer positioned between layer X and layer Y for layers obtained by dividing the carbon sheet equally into three in a direction perpendicular to the surfaces, the filling ratio for the layers becomes smaller in order of layer X, layer Y, and layer Z.
A porous carbon sheet comprising a carbon fiber impregnated with a binding material, wherein, when among layers obtained by dividing the carbon sheet in a through-plane direction into three equal parts within a section extending from a surface having a 50% filling rate, which is closest to one surface, to a surface having a 50% filling rate, which is closest to the other surface, a layer which is close to the one surface and has the largest layer filling rate is a layer X, a layer which is close to the other surface and has a layer filling rate smaller than that of the layer X is a layer Y, and a layer situated between the layer X and the layer Y is a layer Z, the filling rate decreases in the order of the layer X, the layer Y and the layer Z, where the 50% filling rate is a value of 50% of an average value obtained in the following manner:
A porous carbon sheet comprising a carbon fiber impregnated with a binding material, wherein, when among layers obtained by dividing the carbon sheet in a through-plane direction into three equal parts within a section extending from a surface having a 50% filling rate, which is closest to one surface, to a surface having a 50% filling rate, which is closest to the other surface, a layer which is close to the one surface and has the largest layer filling rate is a layer X, a layer which is close to the other surface and has a layer filling rate smaller than that of the layer X is a layer Y, and a layer situated between the layer X and the layer Y is a layer Z, the filling rate decreases in the order of the layer X, the layer Y and the layer Z, where the 50% filling rate is a value of 50% of an average value obtained in the following manner:
A porous carbon sheet comprising a carbon fiber impregnated with a binding material, wherein, when layers obtained by dividing the carbon sheet in a through-plane direction into six equal parts under compression at 0.15 MPa within a section extending from a surface to the other surface include a layer 1, a layer 2, a layer 3, a layer 4, a layer 5 and a layer 6 in this order from the layer including one surface to the layer including the other surface, a layer having a largest filling rate under compression at 0.15 MPa is the layer 2, and
A porous carbon sheet comprising a carbon fiber impregnated with a binding material, wherein, when among layers obtained by dividing the carbon sheet in a through-plane direction into three equal parts within a section extending from a surface having a 50% filling rate, which is closest to one surface, to a surface having a 50% filling rate, which is closest to the other surface, a layer which is close to the one surface and has the largest layer filling rate is a layer X, a layer which is close to the other surface and has a layer filling rate smaller than that of the layer X is a layer Y, and a layer situated between the layer X and the layer Y is a layer Z, the filling rate decreases in the order of the layer X, the layer Y and the layer Z, where the 50% filling rate is a value of 50% of an average value obtained in the following manner:
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