# US 12,007,181 B2 · Heat storage member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,181 B2 - Document ID: US12007181B2 - Status: Granted - Kind: B2 - Application number: 17/505,636 - Filed: 2021-10-20 - Published: 2022-02-03 - Granted: 2024-06-11 - Earliest claimed: 2019-04-25 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Tetsuro Mitsui; Aya Nakayama; Takuto Matsushita - Web page: https://patentgrep.com/patent/US12007181B2 ## CPC - F28F 21/06: of plastics material - B32B 27/18: characterised by the use of special additives - B32B 27/20: using fillers, pigments, thixotroping agents - C09D 7/61: inorganic - C09K 5/06: the change of state being from liquid to solid or vice versa - F28D 20/023: {the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure} - C08K 3/04: Carbon - C09K 5/063: {Materials absorbing or liberating heat during crystallisation; Heat storage materials} - F28F 2245/00: Coatings; Surface treatments - F28F 2260/00: Heat exchangers or heat exchange elements having special size, e.g. microstructures - Y02E 60/14: Thermal energy storage - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention provides a heat storage member which is excellent in a heat storage property and of which a chronological change in a tint is suppressed. A heat storage member according to an embodiment of the present invention includes a heat storage sheet containing a microcapsule encompassing a heat storage material, and a colored layer. ## Claims ### Claim 1 A heat storage member comprising: a heat storage sheet containing a microcapsule encompassing a heat storage material; and a colored layer, a film thickness of the colored layer is 0.5 μm˜15 μm, a ratio of a thickness of the colored layer to a thickness of the heat storage sheet is 1/20 or less, the heat storage member is used as heat storage and heat radiation members of a heat generating unit in an electronic device. ### Claim 2 (depends on 1) The heat storage member according to claim 1, wherein a capsule wall of the microcapsule contains at least one selected from the group consisting of polyurethane urea, polyurethane, and polyurea. ### Claim 3 (depends on 2) The heat storage member according to claim 2, wherein an optical density of the heat storage member is 1.0 or more. ### Claim 4 (depends on 2) The heat storage member according to claim 2, wherein the colored layer is positioned on an outermost layer. ### Claim 5 (depends on 2) The heat storage member according to claim 2, wherein the colored layer contains a resin selected from the group consisting of a fluororesin and a siloxane resin. ### Claim 6 (depends on 2) The heat storage member according to claim 2, further comprising: a protective layer on a surface of the colored layer opposite to the heat storage sheet. ### Claim 7 (depends on 6) The heat storage member according to claim 6, wherein the protective layer contains a resin selected from the group consisting of a fluororesin and a siloxane resin. ### Claim 8 (depends on 1) The heat storage member according to claim 1, wherein an optical density of the heat storage member is 1.0 or more. ### Claim 9 (depends on 1) The heat storage member according to claim 1, wherein the colored layer is positioned on an outermost layer. ### Claim 10 (depends on 1) The heat storage member according to claim 1, wherein the colored layer contains a resin selected from the group consisting of a fluororesin and a siloxane resin. ### Claim 11 (depends on 1) The heat storage member according to claim 1, further comprising: a protective layer on a surface of the colored layer opposite to the heat storage sheet. ### Claim 12 (depends on 11) The heat storage member according to claim 11, wherein the protective layer contains a resin selected from the group consisting of a fluororesin and a siloxane resin. ### Claim 13 (depends on 1) The heat storage member according to claim 1, wherein a content of the heat storage material to a total mass of the heat storage sheet is 65% by mass or more. ### Claim 14 (depends on 1) The heat storage member according to claim 1, wherein the colored layer contains a black pigment. ### Claim 15 (depends on 14) The heat storage member according to claim 14, wherein a content of the black pigment to a total volume of the colored layer is 2% to 30% by volume. ### Claim 16 (depends on 1) The heat storage member according to claim 1, wherein a content of the microcapsule to a total mass of the heat storage sheet is 75% by mass or more. ### Claim 17 (depends on 1) The heat storage member according to claim 1, wherein a latent heat capacity of the heat storage member is 125 J/ml or more. ### Claim 18 (depends on 1) The heat storage member according to claim 1, wherein a latent heat capacity of the heat storage member is more than 145 J/g.