Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Ikuya Inoue

Kohei Ueda

Hiroshi Kanai

Yuki Obara

Tomoaki Hosokawa

Nobukatsu Komatu

Nobukatsu Komatsu

Disclosed is a coated metallic material having a high total light reflectance and excellent moldability. Also disclosed is a method for producing the coated metallic material. Further disclosed is a molded coated metallic article. The coated metallic material is characterized by comprising a coating layer having at least three layers composed of a primer layer, an intercoating layer and a top layer, wherein the intercoating layer contains rutile-type titanium oxide in an amount of 35 to 70% in terms of a solid material concentration by volume and also contains a polyester resin (A) having a number average molecular weight of 19000 to 28000 as a binder resin component, and wherein the polyester resin (A) is contained in the binder at a concentration of 20 mass % or more. In the coated metallic material, an interface between the intercoating layer and the top layer has a center-line average roughness (Ra) of 0.8 &#x3bc;m or more, so that the adhesion between the intercoating layer and the top layer can be further improved and the diffusion reflectance can also be further improved.

Coated metal material and method of production of same

The present invention provides a precoated metal sheet for light reflectors having a high diffuse reflectance of visible lights and an excellent heat absorptivity, and also provides the electric or electronic apparatus using it. The precoated metal sheet comprises a metal sheet or plated metal sheet, a visible light reflective coat on one surface of the sheet, and a heat absorptive coat on the other surface of the sheet. The visible light reflective coat has a diffuse reflectance of visible rays of not less than 0.7 in a wavelength of 400 to 700 nanometers. The heat absorptive coat has a total emissivity of infrared rays of not less than 0.7 in the range of wave number of 600 to 3000 cmmeasured at a certain temperature within the range of from 80 to 200 degrees centigrade.

Precoated metal sheet for light reflectors

The present invention provides a precoated metal sheet, for light reflectors, having a high diffuse reflectance of visible light, and also provides the electric or electronic apparatus using it. The precoated metal sheet comprises a metal sheet or plated metal sheet, a visible light reflective undercoat having a thickness of 3 to 30 micrometers provided on at least one surface of the metal sheet or plated metal sheet, and a visible light reflective overcoat having a thickness of 10 to 40 micrometers provided on the visible light reflective undercoat. The visible light reflective undercoat comprises a binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective undercoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin, and the visible light reflective overcoat comprises a fluororesin-containing binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective overcoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin.

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Kimitsu, Japan

Ikuya Inoue