Kao Corporation

Tetsuya Tabata

Takahiro Maezawa

Toru Ugajin

Taichi Homma

Yuki Kondo

Ryohei Suzuki

An iron powder for an exothermic composition according to the present invention has a bulk density of 0.3 to 1.5 g/cm. Furthermore, an exothermic composition according to the present invention contains the iron powder, a carbon material, a halide salt, and water. Furthermore, an exothermic body production method according to the present invention includes: forming a coated member by coating a base material sheet with a flowable exothermic composition containing the iron powder, a carbon material, and water; and adjusting an amount of moisture in the coated member by removing water from the coated member. Furthermore, the present invention is directed to a production method for the iron powder (an iron powder for an exothermic composition) including: a reducing step of reducing iron oxide to obtain reduced iron; and a step of milling the reduced iron. In the reducing step, the iron oxide is reduced by introducing iron oxide and a solid reductant with a volatile matter content of 10% by mass or more into a heating furnace whose internal portion contains no sulfur gas or is set to an air or inert gas atmosphere, and setting the internal portion to a reducing gas atmosphere through heating under a condition that an ambient temperature of the internal portion is from 900 to 1000&#xb0; C.

Iron powder for exothermic composition, production method therefor, exothermic composition using said iron powder, and exothermic body production method

A method for producing a coated material having an oxidizable metal-containing coating, including the step of applying to a base material () an oxidizable metal-containing coating fluid containing a particulate oxidizable metal, a carbon component, a thickener, and water using a coating apparatus () and a coating fluid preparation step in which a thickener solution prepared by dissolving the thickener in water, the particulate oxidizable metal, and the carbon component or an aqueous dispersion of the carbon component are put and mixed in a preparation tank () to prepare the oxidizable metal-containing coating fluid. In the coating fluid preparation step, the particulate oxidizable metal is added to the thickener solution. The coating apparatus () includes a relay tank () capable of temporarily storing the coating fluid to be fed from the preparation tank () to a coating unit (), so that the oxidizable metal-containing coating fluid in the preparation tank () is fed to the coating unit () through the relay tank ().

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Haga-gun, Japan

Tetsuya Tabata