What are the coil coatings and coil coatings

With the continuous development of coatings, more and more coating products appear in front of our eyes. Coil coatings go to one of them. As a new type of coating, what about its products? Next, let's take a detailed understanding!

What is coil coating

Coil coating is a kind of coating applied on the coil. In order to adapt to the performance characteristics of the coil, the coating film usually has good flexibility and weather resistance. Roll color coating is composed of base material, crosslinking agent, pigment and filler, auxiliary agent and volatile agent. It can be used for both primer and back coat and top coat. Only one layer of aluminum is needed, and galvanized steel and cold-rolled steel are usually coated with primer and topcoat.

Coil coating primer products

Epoxy primer: good adhesion to the substrate, good resistance to water, alkali, and chemical corrosion, but its flexibility is not as good as other primers.

Polyester-amino primer: It has good adhesion to the substrate and excellent flexibility, but it is more sensitive to humid environments and is less chemically resistant than epoxy primer.

Polyurethane (polyester-polyurethane) primer: good chemical resistance, friction resistance, durability and flexibility.

Water-soluble acrylic primer: good adhesion to the substrate, good flexibility, low organic solvent content, low temperature curing, but not suitable for storage in a humid environment, high pretreatment requirements.

Coil coating topcoat products

Among the top coatings for coil coatings, polyester resin coatings are the most widely used, and the curing agent generally used is melamine resin. In recent years, people have taken advantage of the non-uniformity of such resins in paint films to improve their performance. For example, for low-hydroxyl polyester resins, low-molecular-weight methylated melamine resins with a high degree of methyl etherification are used. The amine is volatilized and neutralized by an acid catalyst and baked into a coating.

In addition to polyester topcoats, the most widely used coil coating topcoat systems are PVC plastisols, followed by polyvinylidene fluoride.

Regarding the content of coil coating , I will introduce it roughly here. I hope it will help you. More decoration information is available on this website, so stay tuned.

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