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Surface treatment and coating process for glass fiber reinforced composite material

A composite material and glass fiber technology, which is applied to the surface coating liquid device, pretreatment surface, coating, etc., can solve the problem that it is not suitable for the surface of complex profiles, it is not suitable for the automatic treatment of the surface of complex special-shaped workpieces, and the process is complicated. And other problems, to achieve good decoration and protection, good appearance, simple operation effect

Pending Publication Date: 2021-06-08
NIPPON PAINT CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grinding process used in the above-mentioned prior art is not suitable for the surface of complex profiles, especially special-shaped parts. Most chemical treatment processes require the use of acidic substances, which have high environmental protection and protection requirements for the construction environment.
[0007] The above-mentioned surface treatment process of these composite materials is relatively complicated, especially not suitable for automatic treatment of the surface of complex special-shaped workpieces

Method used

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  • Surface treatment and coating process for glass fiber reinforced composite material
  • Surface treatment and coating process for glass fiber reinforced composite material
  • Surface treatment and coating process for glass fiber reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Using GFRP 2# as the substrate, (1) use non-woven fabric to dedust the surface of the glass fiber reinforced composite material to keep the surface clean; (2) use 800°C n-butane flame to activate the surface of the substrate for 0.5 seconds; (3) spraying water-based primer; (4) drying the primer; (5) spraying water-based topcoat; (6) drying the topcoat.

[0055] Then, the water contact angle on the substrate surface was measured. Such as Figure 1c As shown, according to GB / T 30693-2014, the water contact angle on the surface of GFRP 2# substrate after flame treatment is 63.2°.

[0056] Such as Figure 2b As shown, the adhesion of the substrate measured by the coating cross-hatch method after painting is 0 grade.

Embodiment 2

[0063] In this example, the processing method is the same as in Example 1. The difference is that GFRP 4# is selected as the base material for coating.

[0064] Such as Figure 1d As shown, the measured water contact angle of GFRP 4# substrate surface after flame treatment is 70.1°.

[0065] Such as Figure 2d As shown, the cross-hatch method of the coating after painting measured the adhesion of the substrate as 0 grade.

[0066] Compared with the following comparative example 2.1, it can be concluded that after the flame activation treatment, the contact angle between the surface of the substrate and water decreases significantly.

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Abstract

The invention discloses a surface treatment method for a glass fiber composite material before coating. The surface treatment method comprises the following steps of providing one clean glass fiber composite material; and carrying out flame activation treatment on the surface of the glass fiber composite material. The invention also provides a coating method for the glass fiber composite material. The surface treatment method for the glass fiber composite material before coating is easy to operate and completely meets the requirement for automatic coating, low VOC emission is achieved in the whole coating process, and a finally obtained paint film has the excellent appearance, good adhesive force and ultrahigh weather resistance and achieves good decoration and protection effects on the glass fiber composite material not prone to be adhered.

Description

technical field [0001] The invention belongs to the field of architectural and industrial coatings, and relates to a coating process, in particular to a coating process on the surface of a special-shaped piece of glass fiber reinforced composite material with poor adhesion. After treatment, the surface is especially suitable for the adhesion and construction of water-based coatings. Through substrate surface treatment and coating coating, the coating can be well adhered and provide high weather resistance. It is suitable for continuous and automatic coating production of composite materials, improving Production efficiency and yield. Background technique [0002] In recent years, the vigorous development of the building materials industry has brought new opportunities and challenges. Composite materials have received more and more attention due to their high strength, low weight, high thermal insulation and high fire resistance, coupled with their good molding process, It c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D3/08C08J7/04C09D175/04
CPCB05D7/24B05D3/08B05D7/544C08J7/042B05D2451/00B05D2503/00C08J2475/04B05D2401/20B05D2420/01B05D2420/02
Inventor 潘红霞徐嘉希杨鸿鹏卢俊彪周志平李德恒
Owner NIPPON PAINT CHINA