Four common knowledge of powder coatings that powder coating manufacturers need to know

(The picture shows the production equipment of a powder coating manufacturer in Maryland, USA)

The mixing of powder coatings involves several steps, which are completed in separate equipment.

In this stage of production, the base material and curing agent (not necessarily present) are melted and mixed at the molecular level, and the pigment clusters are broken into original particles and uniformly dispersed in the molten base material/curing agent mixture together with the additives.
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Global Coatings Network understands that at the same time the surface of the pigment particles is wetted by the molten binder.
In principle, there are 3 types of machines that can be used for hot melt extrusion.
Although it is also possible to use Z-blade kneaders and heated two-roll mills, the most important equipment is an extruder.

The mechanical equipment commonly used in the production of powder coatings includes: single screw extruder, twin screw extruder, planetary screw extruder.

3.
"Fine crushing" of powder coating production technology

The paint manufacturer should carry out fine pulverization after hot melt extrusion.
Powder coating manufacturers will use different types of pulverizers to make the particle size of the coating meet the desired range.
All these equipment are manufactured using the principle of grinding.

The contemporary crushing system is supplied as a complete set, which includes a particle size classifier and a dust collector.

4.
"Powder collection and dust removal" in powder coating production technology

Usually a side filter is used or it is more preferred to combine a cyclone separator with a side filter to collect the fine powder from the air classification outlet.
The dust collection device of powder coating depends on the output of the factory and the type and color of the powder coating.
The dust filter requires almost no maintenance work and can also improve the reliability of crushing and classification operations and improve the control of pollution.

5.
"Multi-cyclone powder recovery system" for powder coating production technology

Due to various reasons for electrostatic spraying of powder coatings, there will always be some powders that are not fully utilized.
To solve this problem, the industry has developed a multi-cyclone powder recovery system.
Its function is to collect the powder dropped during the spraying process, separate it into usable powder and unusable waste powder, and send them to corresponding devices.

Fourth, what is the current state of the powder coating market in China?

At present, the market share of China's powder coatings is not large compared to the market share of other types of coatings.
However, in the relatively mature industrial coatings field, powder coatings are one of the few products that can maintain a high growth rate.

There are three main markets for powder coatings in the world, namely Europe, the United States and Japan.
However, due to historical reasons and raw material utilization factors, these regions have developed their own different product systems.

In the United States and Europe, "hybrid" powder coatings based on carboxylic acid polyester and epoxy resins used in indoor applications are the most popular.
In North America, lawn and garden products are also important markets, accounting for approximately 7% of the entire powder coating market.
The general metal surface coating industry is the largest market for powder coatings, accounting for about 50% of the entire market.

The household appliance industry is an important application field of powder coatings.
In the United States, the application of household appliances in household appliances accounts for 17% of the entire powder coating market.

In recent years, the application of powder coatings in the automotive industry has also developed rapidly.

Other market applications of powder coatings include anti-corrosion powder coatings used in pipelines and used to reinforce threaded steel bars .
This type of powder coatings are mainly based on pure epoxy systems (sintered type).
Such powder coatings are almost neglected in the European rebar market.
No matter in terms of technology or market demand, this market still has broad room for development.
(Source: Global Paint Network)

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