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What is PPGI Coil?
PPGI coil stands for "prepainted galvanized steel coil." It is a type of metal coil that is coated with a layer of paint and primer on both sides, which provides a protective barrier against corrosion and other forms of damage.
The PPGI coil is a popular material for roofing and cladding applications. Automotive and appliance industries use PPGI coils for manufacturing various components.
PPGI coils are typically made from hot-dip galvanized steel, which is then coated with a layer of paint and cured at high temperatures to create a durable, long-lasting finish. Rolled metal strips pass a continuous process in the application of organic coating material per requirement by the EN-10169-1 standard.
Cleaning and chemical pre-treatment per side or both sides of the metal surface take place during this process. It involves single or multiple applications of coating powder or paint. Lamination and curing with plastic films follow to ensure the durability of the coating.
| According to positive status: | Color-coated products can be divided into ordinary coated steel plates, printed coated steel plates, embossed coated steel plates and film-coated steel plates, etc.; |
| According to the coating characteristics and functions: | Color coating products can be divided into antistatic color coating, self-cleaning color coating, heat insulation color coating, antibacterial color coating, anti-scratch color coating, etc. |
| Divided by use: | Color coating products can be divided into color coating for exterior use of buildings, color coating for interior use of buildings, color coating for steel windows, color coating for furniture, color coating for home appliances, etc.; |
| According to the type of paint: | Color coating products can be divided into polyester (PE) color coating, high weather resistance (HDP) color coating, silicon modified polyester (SMP), fluorocarbon (PVDF) color coating, etc.; |
| According to coating gloss: | Color-coated products can be divided into high-gloss color-coated (gloss greater than 70 degrees), medium-gloss color-coated (gloss 40-70 degrees), low-gloss color-coated (gloss less than 40 degrees) |
| According to the type of substrate: | Color-coated products can be divided into high-strength steel color coating, red-coated steel color coating, and general forming color coating. Specific grades include TDC51D, TDC52D, TS280GD, TS300, TS350, TS420, TS550, etc.; |
| According to the coating structure: | Color-coated products can be divided into 2/1, 2/2, 2/1M, 3/2, etc., */* represent the coating pass defects on the front and back respectively; |
PPGI coil provides long-lasting and durable performance over the years. The method gives uniform cleaning, coating, and pre-treatment on the metal surface. The highly controlled coating process gives the metal coil several synergistic layers that include the following:
Top coatings could be liquid paint, film, or powder paint. Prepainted metals have over 90 percent liquid paint.
Manufacturers may customize the coating layers depending on the application and customer specifications. It's the coil coater's job to choose the pre-treatment and primer for the substrate and top coating combination.
The coating thickness includes a thin layer of primer , but most coatings are the top coat. In some applications, a thick primer could be a high-build polyurethane. It comprises 50 percent of the total coating thickness.
| Standard | ASTM, AISI, DIN, GB, EN, JIS etc |
| Grade | SGCC, DC51D, DX51D, DX52D, SGCD, SGHC, DX54D, S350GD, S450GD, S550GD etc |
| Thickness | 0.12mm-4.0mm or 0.8mm/1.0mm/1.2mm/1.5mm/2.0mm,etc |
| Width | 600mm, 762mm, 914mm, 1000mm, 1200mm, 1219mm, 1250mm, 1500mm |
| Type of coating structure | 2/1: Coat the upper surface twice, coat the lower surface once, and bake twice. 2/1M: Coat the upper and lower surfaces twice and bake once. 2/2: Coat the upper and lower surfaces twice and bake twice. |
| Use of different coating structures | 2/1: The corrosion resistance and scratch resistance of the single-layer back paint are poor, but it has good adhesion. to be applied to sandwich panels; 2/1M: The back paint has better corrosion resistance, scratch resistance and formability, and has good adhesion Suitable for single-layer profiled panels and sandwich panels. 2/2: The corrosion resistance, scratch resistance and formability of the double-layer back paint are better, and most of them are used for single-layer laminated panels, but their adhesion is poor, so they are not suitable for sandwich panels. |
| Hardness | Soft or hardness, as clients required |
| Packing | Waterproof paper+plastic film+iron packing+bundling or as per customers request |
| Application | Color-coated rolls are light, beautiful, and have good anti-corrosion properties, and can be processed directly. The colors are generally gray, sea blue, and brick red. They are mainly used in advertising, construction, household appliances, electrical appliances, furniture, and transportation. Industry. The coating used for color-coated coils should select appropriate resins according to different use environments, such as polyester silicon-modified polyester, polyvinyl chloride plastisol, polyvinylidene chloride, etc. Users can choose according to the purpose. |
| Delivery time | In 15-30 after receipt advance or LC |
| Payment | T/T or L/C at sight |
| Min order | 25 Mt (one 20ft FCL) |
A coil coating line runs at a constant speed in a processing zone using strip accumulators at the end of each line. It uses entry decoilers, equipment for cleaning, a primer coat, chemical pretreatment, curing, a final coating, an exit accumulator, and exit recoilers.
The coating line's purpose is to coat metal coils with a layer of paint or other finishing materials. This process is vital in construction, automotive, and appliance manufacturing, ensuring the durability, corrosion resistance, and aesthetic appeal of metal products.
The coil coating line's processing typically involves several steps. First, the metal coils are cleaned and pre-treated to remove any surface contaminants and prepare the surface for coating.
Next, a layer of primer is applied to improve adhesion and corrosion resistance. The primer is then cured through a heating process to ensure proper bonding to the metal.
Once the primer is cured, the metal coils are coated with a topcoat of paint or other finishing materials, such as laminates or adhesives. A topcoat application follows. It includes roll coating, spray coating, or electrostatic coating, depending on the specific requirements of the product.
The metal coils are cured again through a heating process. This step ensures the paint or finishing materials adhere to the metal surface and provide the desired level of protection and durability.
The coil coating line's processing offers numerous advantages over traditional painting methods. It allows for a consistent, high-quality finish that is uniform across the entire surface of the metal coil. It also provides excellent corrosion resistance and durability, which are essential for products that are exposed to harsh environmental conditions.
(1) It has good durability, and its anti-corrosion ability has a longer service life than galvanized steel sheets;
(2) It has good heat resistance and is less likely to change color at high temperatures than galvanized steel sheets;
(3) Has good heat reflectivity;
(4) It has processing performance and spraying performance similar to that of galvanized steel sheet;
(5) It has good welding performance.
(6) Good performance-price ratio, durable performance and very competitive price. Therefore, whether it is architectural designers, engineers or manufacturers, galvanized steel sheets have been widely used in industrial buildings, steel structures and civil facilities, such as: garage doors, gutters and roofs.
Whether PPGI or PPGL coils are better depends on the specific application and requirements. Know their differences:
PPGI coils have a zinc coating that provides excellent corrosion resistance and durability. It is typically used for indoor applications or outdoor applications where there is minimal exposure to harsh weather conditions.
PPGL coils have zinc and aluminum coatings that provide superior corrosion resistance and durability. It is suitable for outdoor applications where it will be exposed to harsh weather conditions. The aluminum also provides better heat resistance than zinc, making it a good choice for applications that require heat resistance.
PPGL weighs less than PPGI because aluminum is lighter than zinc. The aluminum-zinc coating with the same thickness of coating covers three percent more space compared to PPGI coil.
The service life of PPGI is shorter than PPGL, as it depends entirely on its zinc coating. The aluminum-zinc alloy of the PPGL alloy offers corrosion resistance. It can last up to three times longer compared to PPGI.
In terms of aesthetic value, PPGL has a smoother surface than PPGI. The aluminum in PPGL offers high-performing adhesive properties compared to PPGL. Galvanized sheets require more pretreatment for painting.
PPGL is more costly than PPGI due to its high performance. There are fewer licensees and manufacturers of PPGL. The cost of a PPGL sheet is 3 to 11 percent higher than that of a PPGI coil.
1. Construction industry
Any sheet material may play an important role in the construction industry. Color steel coils can have different production standards for plating and color according to the requirements of different construction industries and the requirements of different construction projects.
2. Door, window and door body decoration industry
PPGI steel coils are also suitable for the decoration of doors, windows and doors, especially the rolling shutters or ceilings of some houses can be used for decoration. Its reputation in the door and window door body industry has a better decorative effect, and the decoration of color-coated rolls can also make doors, windows or ceilings have a longer use value.
3. Home appliance industry
The home industry is also the main industry of color steel coils, because some refrigerators and washing machines use color-coated steel plates, which are the main raw materials for the surface or shell of these home appliances.
4. Medical industry
PPGI steel coils, stainless steel and other materials as the surface material of the composite board, because of its unique dust-proof, anti-static and anti-bacterial effects, are widely used in medical, electronic, pharmaceutical, food, biological, aerospace and scientific research and other indoor Environmentally demanding purification engineering field.
1.physical test
Physical testing is important to check that the paint has been applied and cured properly to perform well during end use.
2.Vision check
Visual inspection is important to confirm the absence of unacceptable visual defects, as coil-coated metal must meet aesthetic requirements as well as performance-related requirements.
FAQ
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