Abstract: A composite material includes a matrix and a heat-conductive fiber. The matrix includes an organic polymer and forms a porous structure. The heat-conductive fiber is fixed in the porous structure by the matrix. A heat conductivity determined at ordinary temperature by a steady state heat flow method in a fiber axis direction of the heat-conductive fiber is 10 W/(m·K) or more. A density d [g/cm3] of the composite material and a heat conductivity ? [W/(m·K)] in a given direction of the composite material satisfy requirements d?1.1, ?>1, and 4??/d?100.

Abstract: A polyolefin porous film is provided, the film comprising a polyethylene-based resin, wherein a weight average molecular weight of the polyethylene-based resin is 450,000 or less, and a content of a high molecular weight component having a molecular weight of 1,000,000 or more in the polyethylene-based resin is 2 to 11% by mass.

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. The composite material compressed by 10% has a reaction force of 0.1 kPa to 1000 kPa, and the composite material has a heat conductivity of 0.5 W/(m·K) or more. The heat conductivity is a value measured for one test specimen in a symmetric configuration according to an American Society for Testing and Materials (ASTM) standard (ASTM) D5470-01.

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. In the composite material, a value P1 determined by the following equation (1) is 6 or more. In the equation (1), a heat conductivity is a value measured for one test specimen in a symmetric configuration according to an American Society for Testing and Materials (ASTM) standard D5470-01. P1=(the heat conductivity [W/(m·K)] of the composite material/an amount[volume %] of the inorganic particles)×100 Equation (1).

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. In the composite material, a ratio of a smallest heat conductivity of heat conductivities ?x, ?y, and ?z respectively in x-axis, y-axis, and z-axis directions perpendicular to each other to a largest heat conductivity of the heat conductivities ?x, ?y, and ?z is 0.8 or more.

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. The composite material has a heat conductivity of 0.5 W/(m·K) or more and a spring constant of 100 N/m to 70,000 N/m. The heat conductivity is a value measured for one test specimen in a symmetric configuration according to an American Society for Testing and Materials (ASTM) standard D5470-01.

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. The composite material satisfies (i) and/or (ii). (i) P2 is 500 or more. (ii) The composite material has a heat conductivity of 0.5 W/(m·K) or more and a thickness of 0.5 mm to 2.5 mm, the void have an average diameter of 50 ?m to 1500 ?m, and P3 is 70% to 90%.

Abstract: A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids facing a wall surface of the solid portion. At least a portion of the inorganic particles is present on a wall surface. The plurality of voids are in contact with each other directly or via the inorganic particle. A heat transmission path stretching through the plurality of voids is formed of the inorganic particles in contact with each other.

Abstract: A polyolefin porous film is provided, the film comprising a polyethylene-based resin, wherein a weight average molecular weight of the polyethylene-based resin is 450,000 or less, and a content of a high molecular weight component having a molecular weight of 1,000,000 or more in the polyethylene-based resin is 2 to 11% by mass.

Abstract: A disclosed information recording apparatus includes an erasing unit configured to erase prerecorded information on recording media capable of being colored and decolored by heat; a recording unit configured to record information on the recording media from which the prerecorded information is erased; and a control unit configured, when a recording request is received, to cause the recording unit to start recording information on a first one of the recording media and to cause the erasing unit to start erasing prerecorded information on a second one of the recording media.

Abstract: A disclosed information recording apparatus includes an erasing unit configured to erase prerecorded information on recording media capable of being colored and decolored by heat; a recording unit configured to record information on the recording media from which the prerecorded information is erased; and a control unit configured, when a recording request is received, to cause the recording unit to start recording information on a first one of the recording media and to cause the erasing unit to start erasing prerecorded information on a second one of the recording media.

Abstract: A control device for thermal printing head and a printer having the thermal printing head are presented. The control device had a plurality of heating elements to correspond to a plurality of imprinting dots and a plurality of 1-bit registers for holding bit signals to drive each heating element, and includes dividing means for dividing gradation data of a multi-level gradation to express tones of imprinted dots into a plurality of weighted values according to gradation values; and pulse signal generation means for generating pulses having predetermined pulse widths according to respective weighting of gradation values and generating a number of pulses or pulse widths in accordance with a plurality of values of divided gradation data.

Abstract: A method of thermally printing a multicolor image on a print paper is disclosed. With this method, a lengthy multicolor image can be printed on a paper over a plurality of pages of a length determined by a length of each ink zone of an ink ribbon. First, the ink ribbon is set over a platen roller with the paper being interposed therebetween, the ink ribbon having plural groups of ink zones, the ink zones of each group carrying a plurality of heat-dissolving inks of different colors, respectively. One of the ink zones is positioned at a printing position where a thermal head contacts with the platen roller through the ink ribbon and paper. The thermal head is then activated in accordance with image data stored in a memory, and the ink ribbon and paper are advanced to effect transfer of ink so that one of color component images of the image is printed on the paper. The ink ribbon and paper are then advanced by a predetermined distance to separate the paper from the ink ribbon.