Abstract: A carbon fiber wherein an average fiber diameter of a single fiber is in a range of 3 to 10 ?m, and an average value of an intensity ratio (D/G) of a D peak to a G peak in a Raman spectrum in a cross section perpendicular to a fiber axis direction of the single fiber is 0.90 or less in a region inside a circle having a diameter of 1 ?m and centered at a center of gravity of the cross section of the single fiber, and is 0.90 or less in a region up to 1 ?m inside from an outer periphery of the cross section of the single fiber, wherein the D peak is observed at around 1360 cm?1 and derived from a defect in a graphite structure and the G peak is observed at around 1590 cm?1 and derived from the graphite structure.

Abstract: A laminated sheet includes a base cloth layer having a porous structure obtained by impregnating a woven fabric, which has a tear strength by a trapezoid method of 150 N or more in the longitudinal direction and 100 N or more in the lateral direction, with a resin composition containing a polyurethane resin and an organic flame retardant, and a skin layer layered on the base cloth layer, and has plural air holes penetrating in the thickness direction.

Abstract: A laminated sheet includes a base cloth layer having a porous structure obtained by impregnating a woven fabric, which has a tear strength by a trapezoid method of 150 N or more in the longitudinal direction and 100 N or more in the lateral direction, with a resin composition containing a polyurethane resin and an organic flame retardant, and a skin layer layered on the base cloth layer, and has plural air holes penetrating in the thickness direction.