Back to results
US 12,534,631 B2Granted
Pre-coated metal sheet
AssigneeNippon Steel Corporation
InventorsAkiko Hirai, Kunihiko Toshin, Yasuaki Kawamura
Life of this patent
Estimating the term…
Abstract
In order to achieve further improvement in flaw resistance, the present invention includes: a metal sheet; and a color film layer positioned on the metal sheet, wherein: on a surface, of the metal sheet, on a side on which at least the color film layer is positioned, a first region and a second region that are specified by a measuring method of an arithmetic mean surface roughness Sa are present; and the color film layer has a thickness of 1 to 10 μm, and contains particles having a particle diameter equal to or larger than the thickness.
Claims16
A pre-coated metal sheet comprising:
- a metal sheet;
- and
- a color film layer positioned on the metal sheet, wherein:
- on a surface, of the metal sheet, on a side on which at least the color film layer is positioned, a first region and a second region that are specified by a following measuring method of an arithmetic mean surface roughness Sa are present:
- and
- the color film layer has a thickness of 1 to 10 μm, and contains particles having a particle diameter equal to or larger than the thickness, wherein the method of measuring arithmetic mean surface roughness Sa is as follows:
- on the surface of the metal sheet, virtual grid lines are set at intervals of 0.5 mm, and in each of a plurality of regions into which the surface is divided by the virtual grid lines, the arithmetic mean surface roughness Sa specified by ISO 25178 is measured, the region in which the obtained arithmetic mean surface roughness Sa is 1 μm or more is set as the first region, and the region in which the obtained arithmetic mean surface roughness Sa is less than 1 μm is set as the second region.
4 more elements
Dependencies are inferred from the claim text.