Surface treated metal sheet

TW202639337APending Publication Date: 2026-10-01NIPPON STEEL CORPORATION
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Patent Information

Application Number
TW115104331
Authority / Receiving Office
TW · TW
Patent Type
Applications
Current Assignee / Owner
Priority Date
2025-02-04
Filing Date
2026-02-04
Publication Date
2026-10-01

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Abstract

[Problem] To provide a surface-treated metal sheet that maintains excellent design and exhibits superior smoothness during processing. [Solution] The surface-treated metal sheet of the present invention comprises: a metal sheet as a substrate, and a colored film layer located on the metal sheet; the average thickness of the colored film layer is 3.0~10.0μm; the surface of the colored film layer has regions A and B, wherein the arithmetic mean height Sa of region A is less than 0.4μm according to JIS B0681-2:2018 and the skewness Ssk is -2.0 or more and less than -0.3 according to JIS B0681-2:2018, and the arithmetic mean height Sa of region B is 0.4μm or more and the skewness Ssk is -0.3 or more and less than 0; and the skewness Ssk of the surface of the metal sheet and the skewness Ssk of the surface of the colored film layer are both less than 0.
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