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A kind of preparation method of color steel plate

A technology of color steel plate and thin steel plate, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., can solve the problems of color steel plate weather resistance and lack of shedding resistance, etc., to improve the anti-ultraviolet aging performance and strengthen The effect of cohesion and strengthening force

Active Publication Date: 2016-08-10
广东顺德铁业实业有限公司
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AI Technical Summary

Problems solved by technology

Therefore, the existing color steel plates have deficiencies in weather resistance, shedding resistance, etc. How to solve the defects of the above-mentioned existing products is an urgent problem to be solved in this technical field, especially in high-end products.

Method used

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Embodiment Construction

[0028] Concrete embodiment of the present invention, promptly the steps of the preparation method of producing colored steel plate are as follows:

[0029] a. Carry out passivation treatment on the surface of the thin steel plate after cleaning. The conventional passivation solution used is mixed with nano-scale bentonite particles. After drying, a layer of bentonite particles mixed with nano-scale bentonite particles is chemically formed on the surface of the thin steel plate. Oxide passivation layer;

[0030] b. On the passivation layer on the front of the thin steel plate, coat a layer of polyurethane front paint layer mixed with nano-scale bentonite particles by continuous roller coating;

[0031] c. The reverse side of the thin steel plate is coated with a back paint layer;

[0032] d. the composition of the polyurethane front paint layer that is mixed with nano-scale bentonite particles in the above-mentioned steps b is:

[0033] Polyether polyol 55~75g

[0034] Polyi...

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Abstract

The invention discloses a method for preparing colored steel plates with strong binding force, simple process steps, high production efficiency and diversified production varieties. a. Perform purification treatment on the surface of the cleaned thin steel plate. Nano-scale bentonite particles are mixed in the purified liquid. After drying, the surface of the thin steel plate chemically generates a layer of oxide purification layer mixed with nano-scale bentonite particles; b. A layer of polyurethane front paint layer mixed with nano-scale bentonite particles is coated on the purification layer of the front side of the thin steel plate; c. the reverse side of the thin steel plate is coated with a back paint layer; d. the mixture in the above-mentioned steps b has nano-scale The composition of the polyurethane front paint layer of bentonite particles is: polyether polyol 55-75g, polyisocyanate 10-30g, hydrophilic chain extender 3.5-7.5g, cross-linking agent 1.5-3.5g, salt-forming agent 1.5-5.5g g. 0.8-3.8g of nano-bentonite, 170-270g of deionized water, wherein the particle size of nano-bentonite is 50-100nm, cured by heating or / and ultraviolet rays.

Description

technical field [0001] The invention relates to a preparation method for processing the surface of a thin steel plate, in particular to a method for color surface processing on the surface of a thin steel plate. Background technique [0002] Organic / metal composite sheets, sold in rolls or sheets, have been available for decades and are becoming more widely available, after the rolled metal sheet has been coated with a paint or laminated with a plastic film. It has many advantages, for example, the traditional thin plate coating can be changed into continuous coating of raw steel thin steel plates, which is convenient for surface treatment and quality control of coating, and there is no edge dead angle that is easy to cause coating defects, thus obtaining The best coating quality, the second is that the metal sheet can travel at high speed in the coating line, which improves the production efficiency, and it is easy to adjust the travel speed according to the different coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/06C09D175/08C09D7/12
Inventor 李锐波
Owner 广东顺德铁业实业有限公司
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