Nitto-Denko Corporation

Hidetoshi Maikawa

Shigeki Ishiguro

Kayo Shimokawa

Tetsuya Otsuka

A laminated sheet includes a first porous layer including a plurality of fibers of at least one of inorganic fiber or carbonized fiber; and a second porous layer formed of a plurality of organic fibers, wherein the laminated sheet has a surface density of greater than or equal to 400 g/mand less than or equal to 1550 g/m, wherein the second porous layer is formed of the plurality of organic fibers having a mean diameter of fibers being greater than or equal to 0.5 μm and less than or equal to 14 μm, and wherein, expressing a total volume of solids and voids filling a unit volume of the second porous layer as 100%, a percentage of the solids is greater than or equal to 1.0% and less than or equal to 8.0%.

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Ibaraki, Japan

Hidetoshi Maikawa