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Composite material and preparation method thereof

A technology of composite materials and dyes, applied in thin material processing, electrolytic coating, transportation and packaging, etc., can solve the problems of uneven surface film layer, no metallic luster, easy to scratch, etc., achieve low cost, rich surface color, Strong mass production effect

Active Publication Date: 2010-07-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of uneven surface film layer, no metallic luster, easy scratch and easy wear in the gradual multi-color effect of the oxide film layer of aluminum or aluminum alloy in the above-mentioned prior art, thereby providing a Composite material with uniform surface film layer, metallic luster, non-scratch and non-abrasive surface with gradient multi-color effect and preparation method thereof

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Examples

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preparation example Construction

[0016] A method for preparing a composite material, the method comprising: forming a porous oxide film layer on the surface of an aluminum or aluminum alloy substrate by means of anodic oxidation; dyeing the porous oxide film layer, the dyeing method By controlling the time when different areas of the porous oxide film layer enter the dye, the content of the dye filled in the pores of the porous anodic oxidation film layer is distributed in a gradient.

[0017] The dyeing method is to control the porous oxide film layer to enter the dye at a uniform speed along a certain direction, so as to obtain a monochromatic gradient composite material. The single-color gradient composite material is fed into another dye at a uniform speed along the opposite direction to obtain a two-color gradient composite material.

[0018] After one dyeing, the dark area of ​​the anodized film layer has more dye content, and the dye fills most of the pores in this area, while the light area has less d...

Embodiment 1

[0033] This example illustrates the composite material provided by the present invention and its method of preparation.

[0034] 1. Pretreatment

[0035] (1) Degreasing and wax removal

[0036] Dip the 6061 aluminum alloy base material with embossed effect in the solution of 40 g / L and 60°C alloy degreasing powder (LD-208 alloy degreasing powder purchased from Shenzhen Desheng Chemical Co., Ltd.) Take it out after 5 minutes, and wash the alloy degreasing powder on the surface of the substrate with water.

[0037] (2) chemical polishing

[0038] The above-mentioned aluminum alloy substrate after degreasing and dewaxing is immersed in a solution composed of phosphoric acid with a concentration of 700 g / L and sulfuric acid with a concentration of 200 g / L, and after chemical polishing for 5 seconds, it is immediately immersed in water to clean the substrate. After immersing the base material in 10 g / L sodium hydroxide solution for 10 minutes, immediately immerse it in water to ...

Embodiment 2

[0044] Step 1-2 is the same as embodiment 1.

[0045] 3. The gradual change process of two colors: prepare a purple dye (violet SLH produced by Hangzhou Aoye Technology Industrial Co., Ltd.) with a concentration of 5g / L, control the temperature at 45-55°C, and pH 4.5-5.5; prepare a blue dye (Hangzhou Aoye Technology Co., Ltd. The concentration of Blue 503 produced by Industrial Co., Ltd. is 5g / L, the control temperature is 45-55°C, and the pH is 4.5-5.5. Suspend the workpiece (aluminum model 6061) that has been anodized and formed a uniform film layer on the lifting mechanism, dry the surface with compressed air, and then slowly lower it. First, it will be purple, and the darkest part of the color will be controlled for 4 minutes. The dyeing time of the shallow part is 1 second, take it out quickly and wash it with water to prevent flow marks, and dry it, then rotate the anodized film layer 180 degrees along the surface of the porous anodized film layer and then control it int...

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Abstract

The invention relates to a composite material and a preparation method thereof, which belong to the field of aluminum alloys. The invention provides the composite material against the defects of unevenness, no metal luster, easy scratch and easy abrasion of a gradient color film layer on the surface of the aluminum alloy, the composite material comprises a substrate, a porous anodic oxide film layer is arranged on the surface of the substrate, the substrate is aluminum or the aluminum alloy, at least one dye is filled in pores of the porous anodic oxide film layer, and the content of the same dye in part of the pores of the porous anodic oxide film layer is in gradient distribution. The preparation method of the composite material comprises the following steps: using the anodic oxidation method for forming the porous oxide film layer on the surface of the aluminum alloy; and dyeing the porous oxide film layer, wherein the dyeing method is to control the time of entering into the dye of different regions of the porous oxide film layer and further lead the content of the dye filled in the pores of the porous anodic oxide film layer to be in the gradient distribution. The composite material has the advantages of evenness, metal luster, difficult scratch and difficult abrasion of the film layer and is mainly applied on electronic products.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to an aluminum alloy composite material and a preparation method thereof. Background technique [0002] The preparation method of the colored oxide film layer on the surface of substrates such as aluminum or aluminum alloy is to anodize the substrate such as aluminum or aluminum alloy in sulfuric acid to form an anodic oxide film layer, and then carry out dyeing treatment in a solution containing organic dyes, through The adsorption effect makes the dye enter the pores of the oxide film layer, and then through the sealing treatment, the surface of the aluminum or aluminum alloy and other substrates has various colors. But this method can only form single color, can not satisfy people's demand for multi-color. At present, the preparation of the gradient oxide film on the surface of aluminum or aluminum alloy is mainly realized by spraying or printing. For the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/18
CPCC25D11/243Y10T428/249953
Inventor 高春楠陆平李爱华陈梁
Owner BYD CO LTD
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