For giving decorative properties to metal roofs and up tospecial polymer is used for additional protection against corrosionny coatings applied in factorieswhat conditions.
The consumer needs to know that different polymer coatings are characterized by different resistanceresistance to UV radiation (color fastnessbone), to temperature (heat-resistantbone), to aggressive environments andhuman influences and other factors.
Consider the main types of polydimensional coatings.
The acrylic coating is a paint and varnish layer that is extremely unstable, it is easy to damage it when installing the roof. It has a heat resistance of up to + 120 ° С, but it fade in the sun for 5 years, moreover, it has an average stabone to corrosion and after 2 -3 years of operation begins to peel offsew. Layer thickness 25 microns. Mithe minimum processing temperature is –10 ° С. Recommended for use only for temporary structures.
Polyester (polyester enamel)
Coating thickness is 25-30 microns and therefore resistance to furnatural impact is not high. More resistant to mechanical loadspolyester sprinkled with quartz sand, however it ismore expensive. In addition, during its transportation, a number of problems arise.problems associated with the possibility of damage to the bottom layer of metal sheets.
High color polyestertoughness and ductility. Tepresistance to about + 120 ° С. Coverspolyester can be glossyand matt (modifiedteflon). Suitable for buildings with low maintenanceload.
Plastisol (polyvinyl chloride)
Due to its large thickness (175-200 microns), the plastisol coating is one of the most stablesusceptible to mechanical damageholes. However its due to the low ratehigh durability and low durabilityresistance to UV radiation (when heated by direct sunlight, themore than + 80 ° С, the material ages quickly) it is not recommended to use in the southern regions.
Having a great thickness, thesol is highly corrosiveresistance, which creates additionalprotection in dirty conditionsenvironment. Idealny material for the manufacture of seam roofs. Its color fastness is significantly lower than polyester (coating after a few years is equalloses color brightness).
This is a new type of coating on polyurethane base, modifiedpolyamide. The material has good chemical resistance, withstands solar radiation, high temperatures and large suaccurate temperature differences. Minimum temperature at pabot with Pural coated sheets, 15 ° С, maximum – + 120 ° С. Tolthe thickness of the coating is 50 µm. Easily handled as in promilling and installation. Has a silky matte finishness.
PVF2 is 80% irrigatednylfluoride, 20% acrylic. Bythe covering is durable, withstands frost down to –60 ° С and does not lose its properties at a temperature of + 120 ° С. The most stableresistant to UV radiation, practically does not fade. It has a rich color palette, it can be with a glossy or matte surface, with a metallic tint. Compared to other softwarecovering is the most expensivestanding, has a high resistanceto aggressive environments and to furnatural damage.
The most appropriate applicationnyat on the coasts, buildingschemical industry, etc.