Plated steel plate having excellent glossiness and surface property, and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2022042163-A1
Application number	US-201917414222-A
Country	US
Kind code	A1
Filing date	Nov 27, 2019
Priority date	Dec 19, 2018
Publication date	Feb 10, 2022
Grant date	—

Abstract

Provided is a plated steel plate used for interior materials and exterior materials such as home appliances, construction materials, vehicles, etc., and a method for manufacturing same. The plated sheet plate includes: base steel; a Zn—Mg plating layer formed on the base steel; and a UV-curable film layer formed on the Zn—Mg plating layer, wherein a hairline pattern is formed on a surface of the Zn—Mg plating layer, and the Zn—Mg plating layer includes 8 to 27 weight % of Mg and a balance of Zn and inevitable impurities.

First claim

1 . A plated sheet plate having excellent glossiness and surface characteristics, the plated steel sheet including:
base steel; a Zn—Mg plating layer formed on the base steel; and a UV-curable film layer formed on the Zn—Mg plating layer, wherein a hairline pattern is formed on a surface of the Zn—Mg plating layer, and the Zn—Mg plating layer includes 8 to 27 weight % of Mg and a balance of Zn and inevitable impurities.

2 . The plated steel sheet of claim 1 , wherein the UV-curable film layer is transparent.

3 . The plated steel sheet of claim 1 , wherein the Zn—Mg plating layer has a double-layer structure including a Zn layer on the base steel and a Zn—Mg layer on the Zn layer.

4 . The plated steel sheet of claim 1 , wherein the UV-curable film layer has a thickness of 0.8 to 1.2 μm.

5 . The plated steel sheet of claim 1 , wherein glossiness of the plated steel sheet has a relative value of 60 to 120 when reflectivity of glass is 100 during measurement of the glossiness using a glossmeter at a measurement angle of 60 degree.

6 . A method of manufacturing a plated steel sheet having excellent glossiness and surface characteristics, the method comprising:
preparing base steel; forming a Zn—Mg plating layer on the base steel by vacuum deposition, the Zn—Mg plating layer including 8 to 27 weight % of Mg and a balance of Zn and inevitable impurities; forming a hairline pattern on a surface of the Zn—Mg plating layer; coating a UV-curable paint on the Zn—Mg plating layer; and curing the UV-curable paint to form a UV-curable film layer.

7 . The method of claim 6 , wherein the UV-curable paint is a resin composition including a multifunctional urethane (meth) acrylate having three or more functional groups at 3 to 35 parts by weight, a bifunctional urethane (meth) acrylate at 3 to 35 parts by weight, at least one (meth) acrylic acid ester monomer at 20 to 60 parts by weight selected from a monofunctional (meth) acrylic acid ester monomer and a multifunctional (meth) acrylic acid ester monomer, and a radiation polymerization initiator at 0.1 to 15 parts by weight.

8 . The method of claim 6 , wherein the UV-curable paint is coated in a coating amount of 800 to 1200 mg/m 2 .

9 . The method of claim 6 , wherein the curing of the UV-curable paint is performed by irradiating ultraviolet ray having a wavelength of 280 to 400 nm.

10 . The method of claim 6 , wherein the vacuum deposition is performed using electromagnetic levitation physical vapor deposition.

11 . The method of claim 10 , wherein during the electromagnetic levitation physical vapor deposition, a degree of vacuum in a chamber is 1.0×10 −3 mbar to 1.0×10 −5 mbar.

12 . The method of claim 10 , wherein during the electromagnetic levitation physical vapor deposition process, a temperature of a coating material is 700° C. or more.

13 . The method of claim 10 , wherein during the electromagnetic levitation physical vapor deposition process, a difference in temperature in a width direction of the base steel after deposition is 100° C. or less.

Assignees

• Posco

Inventors

• Han Hyeon-Soop
• Kwak Young-Jin
• Kim Tae-Yeob
• Kim Jin-Tae

Classifications

• C23C28/00

  Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D · CPC title

• C22C18/00

  Alloys based on zinc · CPC title

• B32B15/013

  one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• B05D3/067 Primary

  Curing or cross-linking the coating · CPC title