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Black metal sheet

A ferrous metal plate and metal plate technology, applied in the field of ferrous metal plate, can solve the problem of inability to exert blackness, and achieve the effects of resource saving, excellent dispersibility and rationalization

Inactive Publication Date: 2015-04-01
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the black metal plate described in Patent Document 1, the blackness (L value) is at least 30.1, and sufficient blackness may not be exhibited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] Hereinafter, the present invention will be described in detail based on examples. However, the following examples are not limited by the present invention, and can be modified and implemented without departing from the gist of the foregoing / hereinafter described, and all are included in the technical scope of the present invention.

[0125] First, the evaluation method and judgment criteria used in the experimental examples will be described below.

[0126] (single particle size of carbon black)

[0127] The aqueous solution of carbon black was suction filtered through a 0.2 μm filter, and the filter residue was observed with a stage emission scanning electron microscope FE-SEM (“SU-70” manufactured by Hitachi, Ltd.).

[0128] (Volume average particle diameter of carbon black in aqueous solution)

[0129] The aqueous solution of carbon black was measured by the laser diffraction / scattering type using MicroTrack FRA9220 (made by Leeds & Northrup).

[0130] (Volume ave...

experiment example 1-1～1-10

[0228] Experimental examples 1-1 to 1-10: Production of black metal plates

[0229] (preparation of black composition)

[0230] 138.2 to 107.8 parts by mass of pure water were added to 44.4 to 133.3 parts by mass of ink ("Super Thick Ink, BA-8" manufactured by Kuretake Co., Ltd.) as surface-treated carbon black. After 99.8 to 42.8 parts by mass of the mixture resin (a) precursor, 15 parts by mass of colloidal silica (Nissan Chemical Industry Co., Ltd. "Snowtex (registered trademark) XS", solid content concentration: 20%) was added, and finally, As a polymer containing an oxazoline group, 2.6 to 1.1 parts by mass of Epocross (registered trademark) K-2030E (manufactured by Japan Catalyst Co., Ltd.) was added, and prepared in 100 parts by mass of the black composition, containing 20 to 20 parts by mass of surface-treated carbon black. 60 parts by mass, 30 to 70 parts by mass of a binder resin (a), and 300 parts by mass of a black composition (solid content concentration: 10 mass...

experiment example 1-11～1-20

[0233] Experimental example 1-11~1-20: Fabrication of black metal plate with transparent layer

[0234] (Preparation of transparent resin composition 1)

[0235] To 45.3 parts by mass of a polymer polyester resin ("KA-2112" manufactured by Arakawa Chemical Industry Co., Ltd., weight average molecular weight: 23,000, Tg: 70°C), a crosslinking agent ("Symel 303" manufactured by Nippon Cytech Indasters Co., Ltd.) ") 3.4 parts by mass and 2.5 parts by mass of an acid curing catalyst ("NACURE 5225" manufactured by Kusumoto Chemical Co., Ltd.) 1.0 parts by mass of aluminum dihydrogen tripolyphosphate ("K-WHITE G105" manufactured by Teika Co., Ltd.) and 1.0 parts by mass of calcium ion-exchanged silica ("Syromask 52" manufactured by Fuji Silysia Chemical Co., Ltd.) were added as antirust agents, and 144.2 parts by mass of a dilution material ("N Thinner 450" manufactured by Nippon Paint Co., Ltd.) was diluted and stirred. The obtained solvent-based transparent resin composition 1 con...

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Abstract

Disclosed is a black metal sheet exhibiting high jetness which conceals the colour and gloss of a metal sheet, even if the film thickness of the black coating film (black layer) used to coat the surface of the metal sheet is thin, specifically, even if the amount of the black coating film (black layer) deposited is 0.28-1.5g / m² (film thickness: approx. 0.26-1.42 µm). The black metal sheet has a metal sheet, and a black layer formed on at least one surface of the metal sheet. The black layer is configured from a 100 parts per mass black composition comprising 20-73 parts per mass of a binder resin, and 22-60 parts per mass of a surface-treated carbon black, the surface of which is coated with a water-soluble resin. The black layer is characterised in having a dry mass of 0.28-1.5g / m2 and the jetness (L* value) of the surface being at most 24.

Description

technical field [0001] The present invention relates to a black metal plate excellent in blackness. Background technique [0002] In recent years, as the back cover of thin TVs such as LCD TVs and plasma TVs, from the viewpoint of reducing costs and imparting conductivity (corresponding to electromagnetic waves) on the inner side, steel sheets (PCM: pre-coated) coated with black coatings have been used. Metal) to replace the black plastic case is increasing. However, in the existing PCM, in order to hide the appearance and gloss of the original plate (electrogalvanized steel sheet, hot-dip galvanized steel sheet, alloyed hot-dip galvanized steel sheet, etc.) Make it adhere to about 12g / m 2 (The film thickness is about 10 μm), so there is a problem that it takes a lot of time for coating and baking. Therefore, thinning of a black coating film (black layer) is desired from the viewpoint of rationalization of coating work and resource saving. [0003] So far, various PCMs w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B27/20C09D7/61
CPCC08K3/04C09D7/1216C09D7/61B32B27/20B32B15/08
Inventor 中元忠繁山本佳代
Owner KOBE STEEL LTD