Surface-treated metallic material with easy control of glossiness and manufacturing method therefor
Provided is a surface-treated metallic material with easy control of glossiness and a manufacturing method therefor, the surface-treated metallic material comprising: a metallic material; and a coating layer which is formed on at least one side of the metallic material and on which an ultraviolet curable coating composition is cured, wherein the coating layer consists of a plurality of protrusions, which have a volume of 3 to 16 pico liters and are arranged at a density of 5 to 610 per 1 mm 2 of the metallic material. As such, the surface-treated steel sheet is excellent in adhesion, scratch resistance and corrosion resistance, and has easy control of glossiness.
1. A surface-treated metallic material having ease of glossiness control comprising:
a metallic material; and
a coating layer, formed on a surface of the metallic material and on which an ultraviolet curable coating composition is cured,
wherein the coating layer comprises: a plurality of protrusions,
each of the protrusions has a volume of 3 to 16 pico liters, and
the protrusions are arranged at a density of 5 to 610 per 1 mm 2 of the surface of the metallic material.
2. The surface-treated metallic material having ease of glossiness control of claim 1 , wherein the ultraviolet curable coating composition includes 40 to 70 wt % of an oligomer, 20 to 59 wt % of a photopolymerizable monomer, and 1 to 10 wt % of a photoinitiator.
3. The surface-treated metallic material having ease of glossiness control of claim 2 , wherein the oligomer is at least one selected from the group consisting of urethane acrylate, epoxy acrylate, and polyester acrylate.
4. The surface-treated metallic material having ease of glossiness control of claim 1 , wherein the metallic material is one selected from the group consisting of a cold-rolled steel sheet, a hot-dip galvanized steel sheet, an electronic galvanized sheet steel, an aluminum-plated steel sheet, an aluminum alloy-plated steel sheet, a stainless steel sheet, an aluminum sheet, a magnesium sheet, a zinc sheet, and a titanium zinc sheet.
5. A method for manufacturing a surface-treated metallic material having ease of glossiness control, the method comprising:
forming a coating layer comprising: a plurality of protrusions by spraying an ultraviolet curable coating composition onto a surface of a metallic material in the form of droplets,
wherein each of the protrusions has a volume of 3 to 16 pico liters, and the protrusions are arranged at a density of 5 to 610 per 1 mm 2 of the surface of the metallic material.
6. The method of claim 5 , further comprising:
performing ultraviolet curing on the coating layer.
7. The method of claim 6 , wherein the ultraviolet curing is performed for 0.1 to 60 seconds.
8. The method of claim 5 , wherein the spraying is performed using at least one selected from the group consisting of an inkjet head, a spray gun, and an ultrasonic jetting device.
9. The method of claim 5 , wherein the ultraviolet curable coating composition includes 40 to 70 wt % of an oligomer, 20 to 59 wt % of a photopolymerizable monomer, and 1 to 10 wt % of a photoinitiator.
10. The method of claim 5 , wherein the metallic material is one selected from the group consisting of a cold-rolled steel sheet, a hot-dip galvanized steel sheet, an electronic galvanized sheet steel, an aluminum-plated steel sheet, an aluminum alloy-plated steel sheet, a stainless steel sheet, an aluminum sheet, a magnesium sheet, a zinc sheet, and a titanium zinc sheet.