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Curing of Powder Coated Parts
Thermoset powder materials require a certain amount of thermal energy applied for a certain time to produce the chemical reaction needed to cross-link the power into a film. The powder material will melt when exposed to heat, flow into a level film and then begin to chemically cross-link before ultimately reaching full cure. Various methods can be used to supply the energy needed for cure.

Convection ovens use a heat source (usually natural gas) and fan to distribute and circulate air through a duct inside the oven. The heated air will in turn heat the part and then the coating. Convection ovens are the most common type of cure oven used for powder. As the part reaches peak temperature it will conduct heat into the coating and cause the powder to cure.

Infrared (IR) ovens, using either gas or electricity as their energy source, emit radiation in the IR wavelength band. This radiated energy is absorbed by the powder and substrate immediately below the powder without heating the entire part to cure temperature. This allows a relatively rapid heat rise, causing the powder to flow and cure when exposed for a sufficient time. Parts can be cured in less time in an IR oven, but the shape and density of the part can affect curing uniformity.

Combination ovens generally use IR in the first zone to melt the powder quickly. The following convection zone can then use relatively higher airflows without disturbing the powder. These higher flows permit faster heat transfer and a shorter cure time.

A variety of radiation curing technologies are available, including near-infrared, ultraviolet (UV) and electron beam (EB). These processes have the potential to open up new applications for powder coating of heat-sensitive substrates such as wood, plastic parts and assembled components with heat-sensitive details.

SPECIFICATION:

Nanjing Powder New Material Co., Ltd is a professional powder coating manufacturer and exporter in China, Located in Nanjing,the center of powder coating industry,we control the cost well and it is convenient to arrange delivery in time.

With 11 years experience, we focus on developing the technology in powder coating products. With good performance on corrosion resistance and durability due to superior edge coverage, thick film build and no primer required, our products are very popular which bring us more repeat orders.

We are custom powder coatings maker. We provide powder coating companies active in industries related to appliances, furniture, building components, pipelines and general industries. We are professional on epoxy powder, polyester powder, hybrid powder, polyurethane powder, and acrylic powder. We are much stronger on powder coating colors. We provide colors according to pantone, We can also meet your special demands on candy ,metal flake and texture finishes.We have expert team on powder coating, solutions on powder coatings are available if you suffer any problems.

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