Water-based paint coating method for television receiver plastic shell and coating

Abstract

The invention discloses a water-based paint coating method for a television plastic shell workpiece and a coating. Paint comprising specific components is adopted, the water-based paint is evenly sprayed to a plastic shell base material in an electrostatic spraying manner, operation is simple and convenient, an existing mature electrostatic spraying device can be directly used, the manner of three-time layered spraying and forced drying is adopted, three layers of water-based paint coatings different in effect and matched and complementary in performance are obtained, and an even, flat and smooth composite paint film is formed after thermal curing. Compared with a traditional undercoat and finishing coat two-layer paint film structure, the paint has the beneficial effects that the thickness is uniform, the adhesion force is high, the covering power is good, the anti-corrosion capability is high, the electromagnetic radiation absorption capability is high, heat resistance is good, weather resistance is good, the color is full, and pulverization and color fading are not likely to happen; and the technical effects and performance which cannot be achieved by traditional spraying are achieved. The invention further provides three kinds of water-based paint for the television plastic shell workpiece, and the paint can be widely used in electrostatic spraying operation of plastic shells made of plastic base materials such as ABS, PVC and PET.

Description

technical field [0001] The invention relates to the technical field of water-based paint, in particular to a water-based paint coating method and paint for a plastic casing of a television receiver. Background technique [0002] In the current environment with high environmental protection requirements, the reason why plastic paints continue to use oil-based paints is not only low cost, mature process equipment and industry habits, but also because plastic water-based paints have strict requirements on the construction environment and process conditions. At the same time, domestic plastic water-based paints The product, coating process, and equipment are not yet mature, and its advantages over plastic paint are not obvious. Therefore, its large-scale application is limited. [0003] Foreign plastic water-based paints have very strict requirements on the construction environment, not only requiring a constant temperature and humidity working environment, but also very strict ...

AI Technical Summary

Problems solved by technology

[0006] At present, the water-based paint coating products, equipment and processes for plastic parts in the home appliance industry are facing many challenges, mainly including health challenges, environmental challenges, new materials challenges, and rising labor costs.

In the face of challenges, if the water-based paint coating of plastic parts in the home appliance industry cannot find an effective solution, it will seriously affect the market sales of my country's home appliance companies.

[0007] In the process of changing from oil-based resins to water-based resins in the coatings industry, due to the replacement of raw materials, the purchase of new equipment, and the investment in R&D and debugging, the cost on the books may increase, but this issue cannot be viewed only from the perspective of price

The cost of paint resin used by enterprises also includes: 1. Health costs. The possibility of dizziness, eye irritation, allergies, physical lesions and even cancer caused by enterprise workers in the process of using oil-based resins is much greater than that of water-based resins.

2. Environmental protection costs. Traditional solvent-based resins contain a large number of organic compounds VOC such as benzene, xylene, formaldehyde, and free TDI (chemical raw materials for polyurethane paints), which will not only consume industrial raw materials such as petroleum during production and use, but also volatilize harmful gases. , exacerbate the formation of PM2.5 and other air pollution, and there are hidden dangers of harming human health

However, there is no water-based paint and coating process for the plastic casing of the TV receiver that is relatively mature, cost-effective, and can take into account factors such as health, environmental protection, and cost.