Heating unit and method for production thereof
AssigneeSekisui Kagaku Kogyo Kabushiki Kaisha
InventorsTadayoshi Tanei, Minoru Miyamoto, Akio Ohno
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Abstract
Heating unit capable of generating heat upon the passing of an electric current, which comprises a matrix of a hardened hydraulic material and electrically conductive fibers dispersed therein in an amount sufficient to impart electric conductivity and a method for producing the heating unit, which comprises kneading a hydraulic material, water and conductive fibers, optionally molding the kneaded mixture, and then hardening the mixture. The heating unit can be used in various applications such as general household applications, civil engineering applications, industrial applications and railroad applications.
Claims7
A heating unit capable of generating heat upon passing of an electric current therethrough, said heating unit comprising a matrix of a hardened mortar, at least two electrodes set at both ends of the heating unit and electrically conductive carbon fibers dispersed in the matrix, said carbon fibers having lengths of 0.3 to 25 mm, diameters of not more than 50 microns and an electric resistivity of not more than 10.sup.-2 ohm-cm and being in an amount of 0.1 to 3 parts by weight per 100 parts by weight of the matrix.
A method of producing a heating unit capable of generating heat upon the passing of an electric current therethrough, comprising a matrix of a hardened mortar and electrically conductive carbon fibers dispersed in an amount of 0.1 to 3 parts by weight, per weight of the matrix, said method comprising kneading a hydraulic mortar material, water and said conductive fibers, optionally molding the kneaded mixture and the hardening of the mixture, said carbon fibers having lengths of 0.3 to 25 mm, diameters of not more than 50 microns and an electric resistivity of not more than 10.sup.-2 ohm-cm.
Dependencies are inferred from the claim text.