Benefits of Superior Coil Coating Technology
The coil coating method provides a fast, uniform, controlled way to ensure continuous line speed and quality. Nowadays, with the development of industrial technology, industrial automated coating lines have been applied in various fields, such as automotive, construction, home appliance, food and packaging industries.
TheCTP solutionsmethod provides a fast, uniform, controlled way to ensure continuous line speed and quality. Nowadays, with the development of industrial technology, industrial automated coating lines have been applied in various fields, such as automotive, construction, home appliance, food and packaging industries.
Metal substrates
Steel
Cold rolled and hot rolled steel
Galvanized steel
Galfan
Galvalume
Aluminum
Compared to most other application methods, coil coating is close to 100% efficient from a paint application standpoint. In contrast to spray coating, coil coated products provide uniform film thickness as opposed to the thicker films at edges, corners and curves more typical of spray coating.
Benefits of coil coating
Consistent quality
High speed
Near 100% efficiency at a lower cost
High quality
Reduced environmental impact
Wide range of metal types
Wide range of coating types available
Flexibility
Double Sides & Double Coatings Line
Working Process
In the coil coating process, metal coils are first unrolled, cleaned and pretreated, coated with one or more layers of paint on a flat, continuous sheet, then heated and cured, cooled and rewound for shipping. At the manufacturer, it is then cut to the desired size and formed into its final shape.
Coil coatings are often referred to as pre-painted because the metal is first painted and then formed into parts. Pre-painting is the process of painting the metal prior to manufacturing, rather than painting the formed item. The coated product must not only be able to cure quickly, but must also be flexible and resistant to pressure spots, as the coated coils weigh several tons.
Topcoat is applied by reverse roll coating, where the coating roll moves in the opposite direction of the strip, providing a smoother film with fewer defects. Primers and supporters are typically applied by direct roll coating. Some lines also use an extruder or apply the web coating by means of a solid coating block having a softening point so that it can be applied smoothly when heated.
The total global market for coil coatings is in the range of $3.5 billion (USD), with polyester coatings accounting for over 60% of the total market. The types of coating curing used in the coil industry include heat curing, infrared curing, induction curing, and UV curing.
Coil primers and primers are typically much thinner than sprayed liquid or powder coatings, dip coatings or electrodeposition paints. Applied primers are typically applied in the 4-6 micron dry film thickness range, while topcoats are typically used to provide dry film thicknesses of 18-20 microns. Once cured, coil coatings can provide excellent handling, physical, chemical and environmental properties.
In summary, coil coating technology is evolving faster than more traditional application technologies and is expected to continue to grow each year due to a variety of benefits including cost savings, versatility, environmental, performance and quality concerns. Please visit LITONG to get your unique solution!
