There is extensive literature available on color coating in the public domain. This section of the library briefly summarizes the literature related to color coating, starting from the paints used, manufacturing methods, coil-coating process, related international standards, and applications.
The exact composition of a particular paint is often complex and proprietary. In general, however, most paint contains the following:
Binder The paint binder (or resin) is the solid material that forms the bulk of the paint film. It is generally a tough, amorphous polymeric material that gives the paint most of its thermal, mechanical, and weathering properties.
Solvents It adjusts the viscosity of the paint to suit the method of application. Turpentine is generally used as a thinner in oil paints. In emulsion paints, water is used as a thinner.
Pigments Paint pigments are small, hard particles that come in a wide variety of shapes. Their principle functions are to cover the substrate since most binders, by themselves, are more or less translucent. To provide color as required by the appearance of the finished product.
Additives Additives are modifiers added to paint, usually in small quantities, to achieve special effects. They modify the properties of either the wet film or the dried paint and can affect flexibility, color fastness, gloss, solvent resistance,etc.
General Industrial Paint Components
ThomasNet.com
www.thomasnet.com Industrial paint, as used to protect metal, wood, and a wide range of other materials, possesses a variety of traits that can be manipulated to provide application-specific coverage. Of course, these characteristics depend in a large part upon the ingredients of the paint and the performance specifications of the selected application…
Paints
What Is Paint Made Of?
Paint is an essential material used in homes, offices, industries, and even on everyday objects. But have you ever wondered, what is paint made of? In this blog post, we will explore the raw materials for making paint, chemicals in paint, and the various types of paints available in the market. We will also take a deep dive into how different ingredients contribute to paint’s properties, and answer some common questions about paint’s composition.
Incorporation of pigments and extenders into the binder resin to obtain a product smooth & homogeneous. Dispersed in a mixture of solvent which remains liquid throughout the formulation of the film. The first step in making paint involves mixing the pigment with resin, solvents and additives to form a paste. Then paste to be routed into a bead mill. A large cylinder that agitates tiny particles making them smaller and dispersing them throughout the mixture. This is done in high speed dispersion tank which is circular. There is a rotating shaft with blades which agitates the mixture and blends the pigments in solvent. Adjustment of viscosity.
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Paint
How Products are Made
www.madehow.com Paint is a term used to describe a number of substances that consist of a pigment suspended in a liquid or paste vehicle such as oil or water. With a brush, a roller, or a spray gun, paint is applied in a thin coat to various surfaces such as wood, metal, or stone. Although its primary purpose is to protect the surface to which it is applied, paint also provides decoration…
Pre Painting
Coil coating is the most advanced technique for applying organic coating (liquid or film) to sheet metal in a continuous process. Since its inception in the early 60’s the European coil coating industry has produced over 8 billion sq. m., of precoated metals and its products are firmly established in markets such as construction, automotive, domestic appliance, heating and ventilation, packaging, office furniture, shelving, caravans, lighting etc.
Post Painting
Post painting means, painting a metal surface after producing components. Example: Automotive, Appliances using powder coating
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The Process
National Coil Coating Association
www.coilcoating.org Coil coating is a continuous, automated process for coating metal before fabrication into end products. The steel or aluminum substrate is delivered in coil form from the rolling mills. The metal coil is positioned at the beginning of the coating line, and in one continuous process, the coil is unwound, pre-cleaned, pre-treated, pre-primed, and prepainted before being recoiled on the other end and packaged for shipment…
About Coil Coatings
What is Coil Coatings Process?
According to EN-10169:2012-06, the coil coating process is a method of applying an organic coating material on rolled metal strip substrate in a continuous process. This process includes:
- Unwinding the coil and cleaning, if necessary
- Chemical pre-treatment of metal surface (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.
- Cooling and rewinding the same coil for shipment to a sheeter, a slitter or a fabricator.
Choosing the Right Prepainted Metal Product
Europia Coil Coating Association
www.prepaintedmetal.eu Prepainted metal is a high quality product manufactured under strict quality control in the coil coating process. The main substrates for prepainted metal are steel and aluminium strip and these are usually coated with a liquid paint by rollercoating, although sometimes a preformed film is laminated to the surface and occasionally a powder-paint is applied in coil coating….
About Coil Coatings
Prepainted metal
Prepainted metal is versatile and can be used almost everywhere – on building exteriors and interiors, appliances, HVAC, furniture, automotive, etc. It is functional and durable and can be combined with high-performance paint systems in an unlimited spectrum of colors and a wide array of properties. The highly adaptable coil coating process also provides manufacturers with a variety of unique finishes and texture options that look like any material, including wood, slate, and asphalt.
Bare coils of metal are placed on an unwinder or decoiler where the metal is observed for defects. The metal is then cleaned and chemically treated in preparation for painting. Brushes can be used to physically remove contaminants from the sheet, or the metal may be abraded by flap sanders to further enhance the surface. Pretreatments are used to provide the bond between the metal and the coating, in addition to adding any corrosion resistance. The type of chemical treatment varies with the type of metal being used. After drying, the strip enters a coating room for a coat of primer usually on both sides of the sheet. The pickup roll transfers the coating liquid from the pan to the applicator roll. The liquid is then pumped into the pan, and then overflows back to the supply reservoir, where it is remixed and filtered. The paint sheet then enters an oven in which the coating is cured at high temperatures for 15 to 30 seconds. The strip exits the oven and is cooled with air and water. A majority of specifications call for two coats (primer and top coat) on each side of the sheet, requiring a pass through a second coater room and oven. The fully painted sheet then exits the second oven and is cooled before inspection and rewind.
ECCA
Prepainted Metal
The coil coating process which is used to produce prepainted metal is continually evolving to produce better products, higher quality, faster and with lower environmental impact.
Prepainted metal
Prepainted metal is versatile and can be used almost everywhere – on building exteriors and interiors, appliances, HVAC, furniture, automotive, etc. It is functional and durable and can be combined with high-performance paint systems in an unlimited spectrum of colors and a wide array of properties. The highly adaptable coil coating process also provides manufacturers with a variety of unique finishes and texture options that look like any material, including wood, slate, and asphalt.
Special chem
Today, coil coating process presents several opportunities for the world’s coating companies. The coil coating process is like those giant printing presses that produce the evening newspaper. The process doesn’t stop, it runs at a constant speed and coils of metal are continuously spliced together so that the moving web is of unlimited length.
Optimum balance of properties. Guaranteed uniform Surface finish. Enhanced corrosion resistance of substrate. A durable surface which minimizes handling damage. A material which can precisely and consistently meet design specifications in terms of coating thickness, appearance and overall performance. Expenditure on effluent disposal eliminated. Efficient, Energy Saving, Environmental Friendly, Economical. Prepainted metal can be fabricated, formed, drilled, riveted, embossed & bent into required shape and size. Prepainted metal stands against aggressive environmental weathering conditions.
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What is Coil Coating
Prepainted metal
Prepainted metal is versatile and can be used almost everywhere – on building exteriors and interiors, appliances, HVAC, furniture, automotive, etc. It is functional and durable and can be combined with high-performance paint systems in an unlimited spectrum of colors and a wide array of properties. The highly adaptable coil coating process also provides manufacturers with a variety of unique finishes and texture options that look like any material, including wood, slate, and asphalt.
Pre-painted galvanized steel sheets can be use on roofing , walling , cladding , false ceiling, appliances, rolling shutter doors, fencing, cold boxes, pre-engineering buildings, sign boards, partitions, office furniture, drums, insulations etc.
Building Products
Architects and building owners are increasingly turning to prepainted metal to meet their design vision for both commercial and residential installations. Prepainted metal’s ability to be formed into almost any shape, excellent resistance to weathering for superior longevity, infinite aesthetic color and texture options, and positive environmental benefits, make it an ideal choice for both interior and exterior construction applications.
Transportation
The transportation goods industry encompasses several different product types, all of which have or can benefit from the use of prepainted metals by not only streamlining the manufacturing process, but by drastically reducing production costs.
Appliances
Appliance manufacturers are using prepainted metal for several compelling reasons:
- Lower cost solution
- More consistent product
- Team approach to innovation and problem-solving (manufacturer/coater/coating supplier)
HVAC
For the HVAC industry, the use of prepainted coils means not only a better product appearance, but the benefits of higher product quality and performance, increased productivity, and numerous economic advantages through cost elimination. The coil coating process has been a proven method of applying high performance coatings over various metal substrates for many decades because the coils are uniformly cleaned,
Furniture
Prepainted metal is used in a variety of office furniture products; including shelving, filing cabinets, desks and storage units. Prepainted metal allows the designer to choose a specific finish for an item and is used when cost-effectiveness is a key issue and high-quality aesthetics are important. Prepainted metal allows for two sides to be painted different colors simultaneously. Thus, allowing a cabinet drawer to be colorful outside, and gray inside; or a shelving unit to have contrasting colors on the internal and external parts.
Other Goods
Manufacturers of a wide variety of metal products utilize prepainted aluminum and steel, using the highly efficient coil coating process, to make consumer, industrial, and commercial products.
ASTM A755/A755M – 15
Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products. EN 10169 – Continuously organic coated (coil coated) steel flat products. General information (definitions, materials, tolerances, test methods) JIS 3312 – Pre-painted Hot Dip Zinc coated Steel sheets and coils Pre-painted steel Test standards (EN13523)
Test Standards
Test Standards of Galvanized Steel and Pre-Painted Galvanized Steel
Universal Metal Coating Company
www.unicoil.com.sa
Toolkit
This tool kit cross-references a list of European Coil Coating test methods found in
EN 13523 against their counterpart ASTM Guides, Practices and Test Methods,
described below as:
• Guide—a compendium of information or series of options that does not recommend a specific course of action.
• Practice—a definitive set of instructions for performing one or more specific operations that does not produce a test result.
• Test method—a definitive procedure that produces a test result.
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- Formability
- Durability
- Robustness
- Corrosion protection
- Visual appearance
- Cost
- And any special requirements such as chemical resistance
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Choosing the Right Prepainted Metal Product
Europia Coil Coating Association
www.prepaintedmetal.eu Prepainted metal is a high quality product manufactured under strict quality control in the coil coating process. The main substrates for prepainted metal are steel and aluminium strip and these are usually coated with a liquid paint by rollercoating, although sometimes a preformed film is laminated to the surface and occasionally a powder-paint is applied in coil coating….
Lead paint is any paint that relies on lead compounds for its colour. White lead, or lead (II) carbonate (PbCO3), is a typical example, and was once widely used to paint wooden surfaces in homes. Other lead compounds, like vivid yellow lead chromate (PbCrO4), were used as coloured pigments. As well as giving the paint its tint, lead pigments are highly opaque, so that a relatively small amount of the compound can cover a large area. White lead is very insoluble in water, making the paint highly water-resistant with a durable, washable finish. Lead carbonate can also neutralise the acidic decomposition products of some of the oils that make up the paint, so the coating stays tough, yet flexible and crack-resistant, for longer.
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Why Use Lead in Paint?
Royal Society of Chemistry
www.rsc.org Mattel, the world’s biggest toy maker, has recalled millions of toys that were coated with lead paint. Lead’s poisonous properties have been known for thousands of years, so why was lead ever added to paint, and why is lead paint still being made…
Lead-free Paints :
Some paints are now manufactured without lead. The most widely used lead substitute is titanium dioxide, also used for coloring food. Organic pigments can also be alternatives. For quicker drying and gloss, zirconium can be used. The barium-zinc-sulfur combination replaces white lead. But the substitutes are costlier than lead. Therefore, the manufacturers prefer to use lead in paints. In India, Nerolac has launched its lead-free paints. Now the company does not add any lead or other heavy metals in its manufacturing process (see logo), claims nerolac.com. ICI Dulux, too, does not use lead in its paints. Around the image of a green tree its label states: No added lead, mercury, chromium compounds. Asian Paints and Berger Paints also make similar claim. However, lead contamination, lower than limits set by various organizations, may occur through ingredients.
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The New Paliotan® pigments
BASF The Chemical Company
www.basf.com These are the advantages of the Paliotan® hybrid pigments based on inorganic and organic pigments. Properties which make Paliotan® pigments ideal for industrial applications such as agriculture /construction/earthmoving, powder and coil coating for bright and hiding shades. This makes it easy to formulate very innovative and environmentally friendly coatings. As you see – Paliotan® is really more than a simple lead chromate replacement…
CY Paint
The practice of adding lead to paint dates back to ancient times, prized for its durability, vibrant color, and quick-drying properties. However, by the late 19th and early 20th centuries, the toxic effects of lead exposure, particularly on children, became increasingly evident.