Toyo Kohan Co., Ltd.

Takashi Minamigi

Yoshiyuki Sugimoto

Tetsuo Nakamoto

Tsuneo Inui

Yoshikazu Kondo

Katsumi Kanda

Takaaki Okamura

A resin-coated metal sheet in which at least one surface is overlaid by a paint layer E, a modified olefin resin layer D of 5 to 100 microns thickness, a pattern or/and solid decorative layer C, an adhesive layer B, and a transparent polyester resin film A of 5 to 10 microns thickness. The modified polyolefin resin layer provided between the transparent polyester resin film and the metal sheet has excellent adhesiveness against the decorative layer, the paint layer and the polyesters resin film so that delamination of the resin-coated metal sheet does not occur even in the case in which the resin-coated metal sheet is formed under severe conditions such as deep drawing. The modified polyolefin layer absorbs any unevenness of the component layers so that the resin-coated metal sheet exhibits excellent reflectivity.

Resin-coated metal sheet with high reflectivity and excellent adhesion strength

In a resin-coated metal sheet, at least one surface of a metal sheet,as a base sheet is overlaid by a transparent polyester resin film A of 5 to 100 &mgr;m thickness through a paint layer E, a modified olefin resin layer D of 5 to 100 &mgr;m thickness, a pattern or/and solid printing layer C and an adhesive layer B which layers are put one over another in order from the side of the metal sheet toward the transparent polyester resin film. Since the modified olefin resin layer which is provided in between the transparent polyester resin film and the metal sheet has the excellent adhesiveness against the printing layer, the paint layer and the polyester resin film, even if the resin-coated metal sheet is formed under the severe condition against the resin-coated metal sheet, for instance, by deep drawing, delamination does not occur so that the excellent workable adhesion strength is shown. Further, the roughness of the surface of the metal sheet, and unevenness of several component resin layers are absorbed by a modified olefin resin layer so that the excellent vivid relectivity for a resin-coated metal sheet can be obtained.

Resin-coated metal sheet with higher vivid reflectivity having the excellent workable adhesion strength

A method for the production of a metal sheet covered with polyester resin film which comprises laminating a polyester resin film which is preferably crystalline and oriented onto a metal sheet having a lower layer of metallic chromium and an upper layer of hydrated chromium oxide, which sheet has been heated to a temperature above the melting point of polyester resin film and then immediately quenching. This metal sheet covered with polyester resin film is excellent in corrosion resistance and formability.

Growing community of inventors

Hikarishi, Japan

Takashi Minamigi