Abstract: A heat radiation sheet having high heat-radiation property and excellent handleability and having sheet properties permitting the sheet to cope with changes in use temperature thereof. Also provided is a heat radiation device using the sheet. The heat radiation sheet comprises: a binder component comprising: (A) a thermoplastic rubber component; (B) a thermosetting rubber component; and (C) a thermosetting rubber curing agent crosslinkable with the thermosetting rubber component (B); and an anisotropic graphite powder oriented into a specified direction in the binder component.

Abstract: The thermal conductive sheet of the present invention includes a base sheet and, on one surface of the base sheet, a metal foil (C) that has a thickness of from 1 to 30% of a thickness of the base sheet. The base sheet includes a binder component (A) that exhibits elasticity at room temperature and a graphite powder (B) that has anisotropy, and the graphite powder (B) is oriented in a thickness direction.

Abstract: A thermally conductive sheet includes a composition containing graphite particles (A) in the form of a scale, an elliptic sphere or a rod, a 6-membered ring plane in a crystal thereof being oriented in the plane direction of the scale, the major axis direction of the elliptic sphere, or the major axis direction of the rod, and an organic polymeric compound (B) having a Tg of 50° C. or lower. The plane direction of the scale, the major axis direction of the elliptic sphere, or the major axis direction of the rod of the graphite particles (A) is oriented in the thickness direction of the thermally conductive sheet, the area of the graphite particles (A) exposed onto surfaces of the thermally conductive sheet is 25% or more and 80% or less, and the Ascar C hardness of the sheet is 60 or less at 70° C.

Abstract: The thermal conductive sheet of the present invention includes a base sheet and, on one surface of the base sheet, a metal foil (C) that has a thickness of from 1 to 30% of a thickness of the base sheet. The base sheet includes a binder component (A) that exhibits elasticity at room temperature and a graphite powder (B) that has anisotropy, and the graphite powder (B) is oriented in a thickness direction.

Abstract: A heat conducting sheet including a composition, wherein the composition contains plate-form boron nitride particles (A) having an average particle diameter of more than 10 ?m and 60 ?m or less, and an organic polymer compound (B) having a glass transition temperature (Tg) of 50° C. or lower, the plate-form boron nitride particles (A) are contained in the composition in an amount ranging from 45 to 75% by volume thereof, and are oriented to direct the major axis direction thereof along the thickness direction of the sheet. Thus, there is provided an electrically insulating and heat conducting sheet which can keep a high thermal conductivity while the sheet has additional properties such as flexibility.

Abstract: A thermally conductive sheet having both of a high thermal conductivity and a high flexibility is obtained by providing a thermally conductive sheet including a composition containing: graphite particles (A) in the form of a scale, an elliptic sphere or a rod, a 6-membered ring plane in a crystal thereof being oriented in the plane direction of the scale, the major axis direction of the elliptic sphere, or the major axis direction of the rod; and an organic polymeric compound (B) having a Tg of 50° C. or lower, wherein the plane direction of the scale, the major axis direction of the elliptic sphere, or the major axis direction of the rod of the graphite particles (A) is oriented in the thickness direction of the thermally conductive sheet, the area of the graphite particles (A) exposed onto surfaces of the thermally conductive sheet is 25% or more and 80% or less, and the Ascar C hardness of the sheet is 60 or less at 70° C.