Color-coated steel sheet is a new type of pre-coated steel strip product. It is produced on a high-speed continuous production line through a series of processes, including chemical pretreatment, initial coating, and final coating. The coating quality is far more uniform, stable, and superior than that achieved by spraying or brushing individual pieces on formed metal surfaces.
Color-coated steel sheet offers excellent decorative properties, formability, corrosion resistance, and strong coating adhesion, maintaining its vibrant color for a long time. Due to its economic benefits, such as replacing wood with steel, achieving efficient construction, energy conservation, and pollution prevention, it has become an ideal material for building panels today.
Color-coated steel sheet introduction
I. Basic Features
1. Lightweight: 10-14 kg/m2, equivalent to 1/30 of a brick wall.
2. Thermal insulation: Core material thermal conductivity: λ <= 0.041 W/mK.
3. High strength: Suitable for load-bearing ceiling panels, offering bending and compression resistance; generally, beams and columns are not required for buildings. 4. Vibrant Color: No surface decoration is required, and the corrosion protection layer on color-coated galvanized steel sheets maintains its lifespan for 10-15 years.
5. Flexible and Quick Installation: The construction cycle can be shortened by over 40%.
6. Oxygen Index (OI): 32.0 (Provincial Fire Product Quality Inspection Station).
II. Main Types
The substrates for color-coated steel sheets include cold-rolled, hot-dip galvanized, and electrogalvanized steel sheets. Coating types include polyester, silicon-modified polyester, polyvinylidene fluoride, and plastisol. The surface finishes of color-coated steel sheets can be categorized as coated, embossed, or printed. Color-coated steel sheets are widely used in industries such as construction, home appliances, and transportation. In the construction industry, they are primarily used for roofs, walls, and doors in industrial and commercial buildings, such as steel structure factories, airports, warehouses, and cold storage facilities.
III. Coating Types and Properties of Color-Coated Steel Sheet Coils for Construction
Ordinary Polyester Color Coating (PE)
Features: Excellent adhesion; excellent film flexibility; rich colors; good formability and outdoor durability; and relatively low cost. Suitable for general use in factory walls, roofs, warehouses, prefabricated buildings, and interior decoration. Under normal operating conditions and proper processing and installation, pre-coated steel coils can be maintenance-free for 8-10 years, offering low cost and high cost-performance.
Silicon-modified polyester (SMP) coating
Features: Excellent film hardness, abrasion resistance, and heat resistance; excellent exterior durability; excellent chalking resistance and adhesion; rich colors; average bending properties. Suitable for environments requiring high pollution resistance and weather resistance.
Highly weatherable polyester (HDP) coating
Features: Excellent color retention and UV resistance; excellent outdoor durability, chalking resistance, and formability. Suitable for exterior building panels requiring high weather resistance, offering the most cost-effective architectural pre-coating.
Fluorocarbon (PVDF) Coating
Features: Excellent weather, chemical, and corrosion resistance; particularly stable in acidic, alkaline, and heavily polluted environments; excellent machinability; high flexibility, wear resistance, and impact resistance. Suitable for buildings with special requirements for pollution resistance and weather resistance, and requiring extremely long-term durability, such as roofs, walls, and exterior cladding of major public works.
IV. Features and Performance
Color-coated steel sheet is a product made by applying a coating (roller coating) or a composite organic film (such as PVC film) to cold-rolled or galvanized steel sheet after surface chemical treatment, followed by curing by baking. This product is also known as "pre-roller-coated color-coated steel sheet" or "plastic color-coated steel sheet." Color-coated steel sheet is produced in rolls on a continuous production line and is therefore also called color-coated steel sheet coil. Color-coated steel sheet combines the high mechanical strength and formability of steel with the decorative and corrosion-resistant properties of the coating. Color-coated steel sheet is a highly sought-after emerging material worldwide. With technological advancements, growing environmental awareness, and improved living standards, prefabricated prefabricated houses are increasingly showing strong vitality and broad market prospects, gaining popularity in the construction, home appliance, electromechanical, transportation, interior decoration, office equipment, and other industries.
Prefabricated prefabricated houses offer advantages such as light weight, high strength, thermal insulation, aesthetics, and durability. They are high-end buildings that integrate architecture and interior design, and are quick to install. Prefabricated prefabricated houses are clean to construct and are widely used in large-span factories, warehouses, office buildings, villas, rooftop additions, air purification rooms, cold storage, shops, kiosks, and temporary accommodation.
1. Easy InstallationPrefabricated prefabricated houses are lightweight, can be assembled in a modular manner, and can be cut to size, making them easy to install, significantly improving efficiency and reducing construction time. The fire-resistant prefabricated prefabricated sandwich panels are constructed with non-combustible surface materials and insulation, fully meeting fire protection regulations for prefabricated houses. 2. DurabilityMultiple studies, backed by over 40 years of extensive use abroad, have shown that specially coated color-coated steel sheets have a shelf life of 10-15 years. With subsequent application of anti-corrosion coating every 10 years, the lifespan of prefab housing panels can reach over 35 years.
3. Aesthetics
V. Construction and Application
1. Color-coated steel sheet substrates can be cold-rolled, hot-dip galvanized, or electrogalvanized.
2. Color-coated steel sheet coatings can be classified into polyester, silicone-modified polyester, polyvinylidene fluoride, and plastisol.
3. Color-coated steel sheet colors can be customized to meet user requirements, including orange, cream yellow, deep sky blue, ocean blue, crimson, brick red, ivory, and porcelain blue.
4. Color-coated steel sheet surface finishes can be classified as coated, embossed, or printed. 5. The market for color-coated steel sheets is primarily divided into three sectors: construction, home appliances, and transportation. Construction accounts for the largest share, followed by the home appliance industry, and transportation only accounts for a smaller portion.
Construction color-coated steel sheets typically use hot-dip galvanized and hot-dip aluminum-zinc steel sheets as substrates. Processed into corrugated sheets or composited with polyurethane sandwich panels, they are used in the construction of roofs, walls, and doors for industrial and commercial buildings, such as steel factories, airports, warehouses, and freezers.
Home appliance color-coated steel sheets typically use electrogalvanized and cold-rolled steel sheets as substrates, and are used in the production of refrigerators and large air conditioning systems, freezers, toasters, and furniture.
The transportation industry typically uses electrogalvanized and cold-rolled steel sheets as substrates, primarily for oil pans and automotive interior components.
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