Precoated Metal Sheet

Abstract: [Problem] To further improve scratch-resistance properties. [Solution] The present invention comprises a metal sheet, and a colored film layer positioned on the metal sheet. First and second regions that are specified according to the below-described method for measuring the arithmetic mean surface roughness Sa are present on the surface of the metal sheet on the side where at least the colored film layer is positioned. The colored film layer has a thickness of 1-10 µm or greater and contains particles having a particle diameter equal to or greater than the aforementioned thickness. (Method for measuring arithmetic means surface roughness Sa) Virtual lattice lines are set in the surface of the metal sheet at intervals of 0.5 mm, and the arithmetic mean surface roughness Sa stipulated in ISO 25178 is measured in each of a plurality of regions divided by the virtual lattice lines. Regions in which the resultant arithmetic mean surface roughness Sa is equal to or greater than 1 µm are defined as first regions, and regions in which the resultant arithmetic mean surface roughness Sa is less than 1 µm are defined as second regions.

Patent Information

Application #

Filing Date

26 September 2023

Publication Number

38/2024

Publication Type

INA

Invention Field

CHEMICAL

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. HIRAI, Akiko

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

2. TOSHIN, Kunihiko

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

3. KAWAMURA, Yasuaki

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

#	Name	Date
1	202317064530-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [26-09-2023(online)].pdf	2023-09-26
2	202317064530-STATEMENT OF UNDERTAKING (FORM 3) [26-09-2023(online)].pdf	2023-09-26
3	202317064530-PRIORITY DOCUMENTS [26-09-2023(online)].pdf	2023-09-26
4	202317064530-POWER OF AUTHORITY [26-09-2023(online)].pdf	2023-09-26
5	202317064530-FORM 1 [26-09-2023(online)].pdf	2023-09-26
6	202317064530-DRAWINGS [26-09-2023(online)].pdf	2023-09-26
7	202317064530-DECLARATION OF INVENTORSHIP (FORM 5) [26-09-2023(online)].pdf	2023-09-26
8	202317064530-COMPLETE SPECIFICATION [26-09-2023(online)].pdf	2023-09-26
9	202317064530-RELEVANT DOCUMENTS [29-09-2023(online)].pdf	2023-09-29
10	202317064530-MARKED COPIES OF AMENDEMENTS [29-09-2023(online)].pdf	2023-09-29
11	202317064530-FORM 13 [29-09-2023(online)].pdf	2023-09-29
12	202317064530-AMMENDED DOCUMENTS [29-09-2023(online)].pdf	2023-09-29
13	202317064530-Proof of Right [01-11-2023(online)].pdf	2023-11-01
14	202317064530-FORM 3 [06-02-2024(online)].pdf	2024-02-06
15	202317064530-FORM 18 [06-03-2025(online)].pdf	2025-03-06