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1) Coloured steel coil is a kind of composite material, which has both steel plate and organic material. It has not only the mechanical strength and easy-to-form property of steel plate, but also the good decorative and corrosion resistance of organic materials.
(2) Coating types of color steel coil can be divided into: polyester (PE), silicon modified polyester (SMP), polyvinylidene fluoride (PVDF), high weather resistant polyester (HDP), clinker sol.
Colored steel materials are divided into five categories: packaging, household appliances, building materials, optical materials and decorative materials. Among them, household appliances color steel materials have the best and most sophisticated technology and high production requirements.
(3) 1. Despite the large capacity of hot-dip galvanized baseboard for building materials, there is a lack of good baseboard such as flat galvanized steel coil without zinc sparkle and galvanized alloy coated steel coil.
2. The variety and quality of domestic coatings can not fully meet the demand. The high price of imported coatings reduces the competitiveness. The plastic film needed for pasting color boards still needs to rely on imports. There is a lack of high-grade color coated boards with thick, functional, high strength and rich colors.
3. The product is not standardized enough, resulting in serious waste of resources. There are too many low-capacity units with capacity of less than 40,000 tons per year, which have problems in product quality and environmental resources protection. 4. There are too many new color painting units in China, which far exceed the market demand, resulting in low start-up rate or even shutdown of many color painting units.
(4) Editor of Development Trend
Firstly, with high quality substrates, the requirements for surface, shape and dimension accuracy of substrates are becoming higher and higher. For outdoor use, such as small galvanized flat hot galvanized coil, flat galvanized coil without galvanized flat and galvanized alloy hot galvanized coil, and for indoor use, such as galvanized steel coil, coated cold rolled sheet and aluminium coil.
Secondly, to improve the pretreatment process and pretreatment fluid, the number of equipment is small, low cost has become the mainstream process, and constantly improve the stability, corrosion resistance, environmental protection performance of the pretreatment fluid.
Thirdly, pay attention to the development of new coatings, improve the general polyester, polyvinylidene fluoride (PVDF) and plastic sol, obtain super color repeatability, anti-ultraviolet, anti-sulfur dioxide, improve corrosion resistance; develop anti-pollution, heat absorption and other functional coatings.
Fourth, the unit equipment is more perfect. For example, new welding machines, new roll coating machines, improved curing furnace, advanced automation instruments and so on.
Fifth, cold embossing technology has become the trend of development because of its low cost, beautiful appearance, three-dimensional sense and high strength.
Our Color Coated Steel Production workshop: