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Prepainted Coils…Innovative and cost-effective solution
Nowadays, we see the wonderful building designs in both commercial and residential constructions like malls, hotels …etc.
Prepainted coils play a key role in these amazing designs as green building material with aesthetic and cost-effective advantages.
What is prepainted steel?
Colored or prepainted steel is a steel with an extra layer that gives it specific color produced by continuous coating process and has a wide range of applications.
According to EN 13523-0, a prepainted metal (or coil coated metal) is a ‘metal on which a coating material (e.g. paint, film…) has been applied by coil coating’.
Coil coating is a continuous process resulting in colored steel coils.
The definition of a coil coating process according to EN-10169:2012-06 is:
‘A method in which an organic coating material is applied on a rolled metal strip in a continuous process.
This process includes cleaning if necessary and chemical pre-treatment of the metal surface and either one side or two side, single or multiple application of (liquid) paints or coating powders which are subsequently cured or laminated with plastic films.’
Coil coating process:
Coil coating process is a continuous, automated process to paint metal before fabrication into end products.
Coil coating lines recieve steel coils from rolling mills and produce coated steel coils ready for shipment in one continuous process.
First the coil is unwound, cleaned and pretreated, applied on a flat continuous sheet.
Then primer paint is applied by direct roll coating and top paint is applied by reverse roll coat in which the painting roll travels in the reverse direction of the steel strip to provide a smoother film with fewer defects which guarantees high quality finishing.
Finally, the strip is cooled and rewound to a coil and packaged for shipment.
Later in factories it is cut to required sizes and formed into finished shapes.
The most of coating lines contain these steps:
- Unwinding the coil to a steel strip.
- Cleaning the strip
- Power brushing
- Pre-treating with chemicals
- Drying the strip
- Applying primer on one or both sides
- Curing (often only 15 to 60 seconds!)
- Cooling the strip
- Top coating on one or both sides
- Second curing
- Cooling down to room temperature
- Rewinding of the coated coil
Coating lines are working at very high speed up to 700 feet per minute.
Coil coating technology has developed rapidly due to its advantages like cost and time savings, versatility, environmentally friendly, high performance and quality.
The steel colors:
Colors are applied to steel according to the RAL codes system which is European color matching system that defines color codes for paint, coatings and plastics.
‘RAL’ is the abbreviation of ‘Reichs-Ausschuß für Lieferbedingungen und Gütesicherung’.
This name can be translated in English as ‘National Commission for Delivery Terms and Quality Assurance’.
RAL codes consist of four digits and define 1625 different colors.
For example: Red hues: from RAL3000 to RAL3033 and Green hues from RAL6000 to RAL6038.
The advantages of prepainted coils:
Prepainted steel has several benefits over other steel types, it provides innovative and beautiful designs and durable surfaces, in addition to green and cost benefits.
Prepainted coils advantages include:
Prepainted coils’ beauty can transform ordinary buildings to extraordinary with the laminate films that applied in the coil coating process.
Also, it keeps consistent quality, low cost, design flexibility, and green properties.
Because of the amazing durability of prepainted steel it ensures life longevity without degradation.
Special treatments can produce special prepainted steel like:
- Corrosion resistant
- UV resistant
In fact, about 95% of used prepainted steel is collected and recycled.
Steel continually recovers its original properties, even after multiple times of recycling, allowing it to be used again and again.
Whereas most other building materials lose their properties after recycling.
Therefore, for environmentally friendly buildings, there’s no comparison!
The use of prepainted coils is known as the most cost saving method for factory owners, because the colored coils arrive ready to fabricate into parts, and are consistent in quality, appearance or functionality.
And that eliminates the need for a costly in-house paint shop, and rid the manufacturers from meeting stringent EPA regulations and production bottlenecks.
Prepainted coils applications:
There are countless end uses for prepainted steel coils enter in many basic industries include:
The ability of prepainted steel to be formed into almost any shape, resistance to weathering, economical benefits, and infinite color and texture options, make it a perfect choice for both interior and exterior construction applications.
Prepainted coils are used in roofing, walling, rainware(gutters and downspouts), garage and entry doors, storage units and warehouses and interior building design.
The transportation industry benefits from the use of prepainted metals to simplify the manufacturing process, and reduce production costs.
Prepainted coils are used in the manufacturing of automotives, motorcycles, tractor trailers and trailer van panels.
Appliance manufacturing companies prefer to use prepainted coil for its lower cost and to produce more consistent products.
Appliances that use prepainted coils include: laundry, refrigeration, dishwashers and small appliances.
HVAC (Heating, Ventilation, and Air Conditioning)
The use of prepainted coils in the hvac industry guarantees many benefits include: better appearance, higher quality and performance, cost-efficiency, protection from mold and microbes and higher productivity.
prepainted steel is used when cost-effectiveness is a key issue and high-quality aesthetics are important.
It is used in a variety of office furniture products, like shelving, filing cabinets, desks and storage units.
Prepainted steel can meet the need of modern and aesthetic designs beside the environmental requirements while preserving the cost efficiency.
Prepainted coils are used in interior and exterior designs for most beautiful buildings.
Manufacturers use prepainted coils that are made to their unique specification to reduce production costs, save time and efforts.
Examples of additional industries that use prepainted steel include:
containers and metal cans, lighting fixtures, electrical cabinets and many other industries.
Pick your choice and order!
Definitely, now you are aware about the amazing benefits of prepainted steel and you want to use it for important and modern projects.
Our company supplies your need of prepainted coils with specific treatment, colors or textures you require.
Exanvil Gmbh guarantees you the good market price, super quality and in-time delivery.
If you are an architect, designer or manufacturer don’t hesitate to contact us for help or more information about prepainted coils best suited for your application.
Prepainted steel coils are very useful products that enable us to reimagine our world with innovative shapes and colors.