what makes powder coating work

Thermoplastic powder coating began to appear in 1950, it was dissolved in melt at the 

temperature of spraying, and solidified into a film at the time of cooling. Because the 

processing and the spraying method are simple, the coating can only be heated and melted, 

and the flow is smooth, the cooling or the extraction can be solidified into a film, and 

the complicated solidification device is not needed. Most of the raw materials used are 

common polymers in the market, most of the conditions can meet the requirements of the use 

of performance. But there are some shortcomings, such as high melting temperature, low 

color level, and poor adhesion of the metal surface, the application of paint in a lot of 

time need to use an auxiliary agent.

Filler or pigment, in addition to the formula can be 

more economical than the economy, there are other benefits. Compared with it, the larger 

particle size pigments, they give the film a smaller size of pigment particles and between 

the filler particles, thus the best gap packing density. As a function of filler in the 

powder coating of the extinction agent, and to support the anti corrosion protection. The 

most commonly used filler is calcium carbonate. These are the natural occurrence of chalk. 

The type of the filler is used as an extinction agent for the platelet like structure. The 

impact of the flow of suitable talc, a naturally produced, which is also present in the 

platelet. Spherical barium sulfate is a good coating density for the control of the ideal,The main component of each coating system is binder. These form the paint film, which is 

the foundation, enveloped in the inside of all solid state. It determines the basic 

properties such as surface quality, hardness and film stability. The binder includes a 

long, mostly organic compound containing the contents of the reactive groups. Synthetic 

resin powder coating are used, which can be connected together by the network, or for the 

branching macromolecular curing agent. Mainly used for epoxy, carboxyl - and hydroxyl 

containing polyester, OH- and GMA- acrylic resin, resin and special application 

modification. The selection of the binder basically determines the physical properties of 

the coating, so its operating range.