This article takes you to understand the pattern powder coating

Pattern powder coating is a kind of art powder coati.

The pattern powder coating is characterized by beautiful and clear patter.

In China, pattern powder coatings have been used on industrial sewing machines, refrigerator tops, instrument housings, textile machinery, elevators and other products, as well as on micro-motor housings, ceiling fan housings, electric cooktops, metal furniture and other produc.

Research on pattern powder coating

The main difference between patterned powder coatings and flat powder coatings is that the coating surface is textur.

However, the texture often produces pit-like pits on the surface of the coati.

At present, a floatation agent has been studied, which has both the effect of floatation and elimination of pitti.

Metal powder-type pattern powder coatings, especially aluminum powder with high chemical activity, are easy to react with acids, alkalis and salts, and their application has certain limitatio.

However, the metallic luster of the metallic powder pattern powder coating is unmatched by other powder coatin.

The pattern and size of the pattern powder are closely related to the components of the formula and the preparation proce.

In the pattern powder coating formulation, E-12 epoxy resin, ie 604 epoxy resin, is mainly us.

Because, in order to produce the texture effect, there must be a curing agent with a fast reaction speed among the two curing agents, otherwise 2-methylimidazole will not have the effect of accelerating the reaction, the texture effect of the pattern powder will not be obvious, and the brittleness of the coating will be reduc.

The amount of curing agent is selected, in addition to ensuring that the epoxy system is fully cured and has sufficient mechanical strength, the powder should also have an appropriate gel time, and the coating should have a longer flow time to gel after the texture effect is implement.

The type and amount of plasticizer also have a great influence on the pattern of the coati.

However, for light-colored pattern powder coatings, high pigment content can also obtain patterns of a certain sha.

Preparation process of pattern epoxy powder coating

Patterned powder coatings can be formulated with two-component or one-component methods:

Two-component method

The two-component method first produces a one-component powder with lower surface tensi.

The preparation method of component B is the same as the ordinary milling proce.

The resin, curing agent, filler, pigment, e.

are mixed and then extruded, and then an appropriate amount of component A is added according to the requirements of the shape and size of the pattern, which is the pattern epoxy res.

powder coati.

One-component method

The one-component method is a common method of mixing resin, curing agent, plasticizer, additive, embossing agent, pigment, filler, e.

, and extruding and kneading through an extrud.

There are many methods for preparing pattern powder coatin.

In addition to the above methods, there are also incompatible polymer methods, thermoplastic resin and thermosetting resin mixing metho.

Fourth, the construction of pattern powder coating

The pattern powder coating is mainly constructed by electrostatic spraying, and the voltage of the electrostatic generator during spraying is 60 ~ 80 .

When the voltage is lower than 50kV, the powder adsorbed on the workpiece is thin, and when the voltage is too high (greater than 90kV), the powder attached to the workpiece will rebound, the powder layer will be uneven, and there will be small pi.

The spraying pressure should not be too high, preferably 5~1 atmosphe.

When spraying aluminum powder pattern powder coating, the air pressure is too high, the coating pattern is not clear enough, or individual pits are generat.

Color pattern powder has no such signs, but the spraying pressure is high, the powder escapes more, and the recovery volume is lar.

The pattern powder coating is easier to electrostatically spray than the flat powder coating, because the pattern powder is thicker (below 120 mesh), and it is not easy to accumulate and block in the powder bucket, pipeline and spray gun, and the powder is smooth and less flyi.

Due to different particle sizes and components, the thickness of the pattern powder coating is 10~20 microns thicker than that of the flat type, and the thickness of the pattern powder coating is 10~20 microns thicker than that of the flat type, and the maximum thickness is 120 microns, and the general thickness is 80~10 micro.

bett.

Pattern powder coatings can also be applied by electrostatic fluidized bed meth.

The fluidized bed coating has no electrostatic shielding effect, and is suitable for complex workpieces with groove shap.

Due to the heating of the workpiece, the thickness of the coating is significantly higher than that of electrostatic spraying, usually 20-25 .

As the coating thickness increases, there is more room for "floating" in the process of texture generation, so the generated patterns tend to be ice flo.

Five, the performance of pattern powder coating

Epoxy pattern powder coatings, except for certain properties, are similar to epoxy powder coatin.

The metal pattern powder coating has poor chemical corrosion resistan.

Aluminum powder is a kind of active met.

When the aluminum powder pattern powder coating is immersed in acid and alkali solvents, the silver pattern floating on the surface of the coating quickly reacts with acid and alka.

disappeared, but the underlying coating was still inta.

In evaluating textured powder coatings, in addition to the basic properties of the coating, the appearance of the texture is importa.

Now the successful pattern powder coating has been researched, the pattern is clear and beautiful, the pattern arrangement is regular, and the gloss is hi.

Compared with the same foreign products, it is in a leading positi.