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Black-coated steel sheet, processed article, and panel for thin-screen television set

A technology for coating steel sheets and black, which is applied in the field of black painted steel sheets, processed products and thin TV panels, which can solve the problems of unfavorable manufacturing cost and long time of coating film, and achieve the effect of excellent electromagnetic wave shielding

Inactive Publication Date: 2013-07-31
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if a coating film of 20 μm is to be formed, it takes a long time for coating and baking, and the thicker the coating film is, the more disadvantageous it is in terms of manufacturing cost. Therefore, from the perspective of rationalization of coating operation and resource saving From the point of view, it is necessary to thin the coating film

Method used

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  • Black-coated steel sheet, processed article, and panel for thin-screen television set
  • Black-coated steel sheet, processed article, and panel for thin-screen television set
  • Black-coated steel sheet, processed article, and panel for thin-screen television set

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Effect test

Embodiment 1

[0069] Embodiments of the present invention will be described below.

[0070] As galvanized steel sheets for painting, various thicknesses: 0.5mm electrogalvanized steel sheets (plating code: EG), hot-dip galvanized steel sheets (plating code: GI), alloyed hot-dip galvanized steel sheets (Fe content: 10% by mass, plating symbol: GA), hot-dip Zn-Al steel sheet (Al content: 4.5% by mass, plating symbol: GF) and hot-dip Zn-Al steel sheet (Al content: 55% by mass, plating Mark: GL).

[0071] The amount of plating solution deposited on one surface of each plated steel plate (g / m 2 )As shown in Table 1. In addition, the deposition amount of the plating solution and the composition of the plating solution are the same on one surface (surface) and the other surface (back surface) of the steel sheet. After degreasing the galvanized steel sheet, the following (i) and (ii) treatments were performed to prepare a coated steel sheet as a sample.

[0072] (i) Apply a prescribed chemical ...

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PUM

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Abstract

A black-coated steel sheet exhibits good bendability and a good appearance after press working is provided. Zinc based plating layers, a chromium-free chemical conversion coating disposed on the zinc based plating layer, and a colored single organic coating which is disposed on the chemical conversion coating and which contains a polyester resin having a hydroxyl value of 10 KOHmg / g or more, an imino-containing melamine resin, and 5 to 15 percent by mass of carbon black are included, wherein the glass transition temperature (Tg) of the organic coating is 40° C. or higher, the film thickness is 10 μm or less, and the hardness is 200 N / mm2 or more.

Description

technical field [0001] The present invention relates to a black-painted steel sheet, a processed product, and a thin TV panel, and particularly relates to a black-painted steel sheet that is excellent in bending workability and appearance after pressing, is relatively thin, and has a high hardness of the painted coating. [0002] The black-coated steel sheet of the present invention is suitable, for example, as a material for housings of AV equipment represented by thin TV panels such as liquid crystal TVs and plasma TVs. Background technique [0003] Since the coated steel sheet is usually pressed and bent when being formed into, for example, a TV panel, etc., it is required to have a good appearance after bending and pressing. In general, pre-coated steel sheets (painted steel sheets) generally use two-coat steel sheets as follows: the primer coating film on the outer surface side mainly uses modified polyester resin and epoxy resin to ensure adhesion to the base steel she...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00B32B15/09H04N5/64C09D7/48C09D7/61
CPCH05K9/0096H04N5/64C23C2/26H05K7/20427C09D7/1216Y10T428/12576Y10T428/12569Y10T428/12993Y10T428/12979Y10T428/265Y10T428/12972Y10T428/12556Y10T428/12799Y10T428/12625C09D7/61C09D7/48C22C28/00B32B15/09
Inventor 多田千代子尾形浩行
Owner JFE STEEL CORP