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Production process and characteristics of powder coatings

December 12, 2019


Powder coating is completely different form from general coating, it exists in the state of fine powder.Powder coating is a new type of 100% solid powder coating without solvent.So it's called powder paint.With no solvent, no pollution, recyclable, environmental protection, save energy and resources, reduce labor intensity and high mechanical strength of the film. Powder coating production process is complicated, the main steps are as follows: material, bearing, premixing, melting extrusion, pressing, coarse crushing, fine crushing, testing, packaging, storage.The production of high-quality powder coatings, raw materials, technology, technology, production environment and management have strict requirements, any link problems will affect the quality of products.

First of all, in the selection of raw materials, the choice of suitable and good raw materials is the premise of making good powder coating.For example, in the preparation of epoxy powder coating, we usually choose the epoxy resin to consider the softening point, organic chlorine, inorganic chlorine value and epoxy value.For example: usually used in powder coating with the softening point of the epoxy resin in 90℃, the reason is that the softening point of the epoxy resin is too high to make the powder coating poor fluidity, and in the melting and melting extrusion, the melting and melting temperature is often high, this will make part of the reaction, even gelatinization phenomenon.

And the softening point is too low is not good, too low softening point made powder coating film poor mechanical properties, powder storage easy to knot fast.In addition to resin, curing agent, yan packing and auxiliary selection also need to be careful, as well as in the same formula of each component of the miscibility is also an important factor, miscibility of powder coating not only gloss and film leveling agent is affected by its coating mechanical properties will also be greatly affected.

Anticorrosion PigmentsInkjet Receptive CoatingMatting AgentSilica Powder 11 Jpg

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