High-strength long-service-life titanium-silver backboard of household appliance

Abstract

The invention relates to a high-strength long-service-life titanium-silver backboard of a household appliance. The high-strength long-service-life titanium-silver backboard is sequentially provided with a titanium-silver white refined coating, a joining layer, a titanium-silver white pre-coating, a first passivation layer, a galvanized plate, a second passivation layer and a titanium-silver white back coating, wherein the titanium-silver white refined coating comprises polyamide resin, silver powder, silver oxide, titanium dioxide and a surfactant; the titanium-silver white back coating comprises polyester resin, aluminum powder, zinc oxide, titanium dioxide and a surfactant; and the joining layer comprises a propyne-butyl acrylate copolymer, polyethylene glycol and octyl p-methoxybenzoate. Through improving the structure and formula of the coating of the backboard of the household appliance according to the scheme, not only is the favorable bending processability of the backboard not influenced, but also the backboard has the characteristics of acid and alkaline resistance, solvent resistance and ageing resistance and can still keep relatively high coating bonding strength if being in a humid environment or under a relatively large temperature difference condition for a long term, and the coating is good in substrate adhesive force, incapable of losing the luster, free of dust accumulation on the surface and free of pulverizing, cracking or blistering phenomenon if being used for a long term.

Description

technical field [0001] The invention relates to a backboard material for home appliances, in particular to a high-strength and high-lifespan titanium-silver white backboard for home appliances. Background technique [0002] With the rapid development of science and technology, the service life of home appliances has also been extended. Taking refrigerators as an example, the normal service life of the internal core component compressor is at least 10-15 years. Therefore, for a refrigerator, its The corresponding service life of all internal accessories should also be at least 10 years, otherwise the compressor, which is the main component, is not broken, but other small parts are damaged. When a home appliance enters the end of its life, its maintenance cost It is very high, and many people are unwilling to spend a large amount of money to repair an old home appliance. This makes many old home appliances discarded before they are completely scrapped, which invisibly causes a...

AI Technical Summary

Problems solved by technology

The backplane of the prior art can only last for 3-5 years. This is mainly not because the quality of the base steel plate of the backplane is not good enough, but because the bonding strength of the coating on the surface is not high enough. Under the influence of moisture, dust, corrosion, etc., the surface of the coating begins to crack or even fall off, and after the coating falls off, the steel plate inside is exposed and begins to rust. With the damage of the protective layer of the back plate, the core components inside the appliance also It begins to suffer from various erosions, and the service life of home appliances begins to decline. Therefore, the importance of the backplane is self-evident

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