The production process includes steel strip pretreatment process, primer coating process, primer baking process, finish coating process, finish baking process and traction winding process. Using high-quality substrate, the requirements for the surface,
shape and dimensional accuracy of the substrate are getting higher and higher. For outdoor use, such as small zinc flower flat hot-dip galvanized steel coil, non zinc flower flat hot-dip galvanized steel coil, the zinc alloy hot-dip galvanized steel
coil rising in time; for indoor use, such as electric galvanized steel coil, film coated cold-rolled plate and aluminum coil.
The main technology is to improve the pretreatment process and the pretreatment fluid, with less equipment and low cost. The stability, corrosion resistance and environmental protection performance of the pretreatment fluid are constantly improved. Note
the development of re coating, improve the general polyester, polyvinylidene fluoride (PVDF) and plastisol, obtain super color reproducibility, UV resistance, sulfur dioxide resistance, and improve corrosion resistance; develop functional coatings such
as pollution resistance and heat absorption
The unit equipment is more perfect. For example, new welding machine, new roller coating machine, perfect curing furnace, advanced automatic instrument, etc. As the cost of cold embossing is lower than
that of hot embossing, which has the characteristics of beauty, three-dimensional sense and high strength, the production technology of cold embossing has become the development trend. The upper surface of the base color steel plate must be electrically
polished to be free of dust, grease, pollution and rust; the dust on it must be cleaned with a dry cloth before painting
The paint shall be divided into primer and finish coat, i.e. anticorrosive primer and surface finish coat. Generally, the anticorrosive
primer shall not be less than two coats. Rainy and windy weather shall be avoided during the painting process. In summer, the painting temperature shall be higher than 5 ℃ and not higher than 35 ℃. The painting shall be continuous to avoid bottom exposure.
Main construction method 4.1 construction environment a. the construction environment temperature should be - 1530 ℃, and the relative humidity should not be greater than 80%. When the construction environment temperature is lower than 10 ℃, heating
and warming measures shall be taken. b. Before anti-corrosion construction, according to the construction environment temperature, humidity, raw materials and working characteristics, the appropriate construction mix proportion and construction operation
method shall be selected through the test before large-area construction.