Paint that can make the coated object produce temperature regulation effect under sunlight
Reflective coating refers to the coating that can generate temperature under sunlightadjustEffective coatings, including solar shielding coatings, solar reflective coatings, space thermal insulation coatings, energy-saving thermal insulation coatings, infrared camouflageCooling coatingEtc.
Chinese name
Reflective coating
Including solar energy
Shielding coating
New
Cooling paint set reflection
Radiation
Heat insulation and integration with hollow microspheres
new typeCooling coatingCollect reflection, radiation andHollow microsphereThe heat insulation is integrated. The coating can highly reflect the solar infrared and ultraviolet rays in the range of 400nm to 2500nm, prevent the sun's heat from accumulating on the surface of the object, and automatically radiate the heat from the surface of the object to reduce the temperature of the object. The coating can radiate the heat to reduce the temperature even in cloudy days and nights,At the same time, hollow beads with extremely low thermal conductivity are placed in the coating to isolate the heat transfer, which can isolate the external heat and transmit to the interior of the object even when the atmospheric temperature is very high. The three functions ensure that the object coated with the coating cools down, and ensure that the internal space of the object can maintain a permanent and constant temperature.
influence factor
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Resin effect
For the sunHeat reflective coatingThe smaller the absorption of visible light and near-infrared light, the better. The resins commonly used in general coatings can be used for solar heat reflective coatings.It is required that the transparency of the resin is high, the light transmittance is above 80%, the solar energy absorption rate is low, and some groups absorb heat. Therefore, when designing synthetic resin, try to make the resin contain as few C-O-C, C=O, O-H and other groups as possible.
Pigment effect
The absorption of pigments to visible light and near-infrared light is also as small as possible. At the same time, in order to reduce sunlight transmission, pigments should scatter sunlight as much as possible.
The scattering ability of pigment to visible light and near-infrared radiation depends on the difference of refractive index between pigment and resin. The scattering rate m is defined as the ratio of refractive index of pigment and resin.N ρ is the refractive index of pigment, the index of common pigment is 1.4 (2.8), and nR is the refractive index of resin (scattering rate formula is commonly used)
The index of mechanical resin is 1.45 (1.50, little change).To achieve high reflectivity, pigments with high refractive index must be selected.
Effect of coating thickness
Coating thickness The thinner the thermal reflective finish coating is, the better. Generally, the coating thickness is 20~40 μ m.
application area
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Reflective coatings can be widely used in building, chemical industry, petroleum, electricity, metallurgy, shipbuilding, textile, storage, transportation, aerospace and other industries to cool down, save energy, and create a comfortable human living and working environment.
When the sun is strong, the coating can reduce the surface temperature of the object by more than 20 ℃, and the temperature can be reduced to more than 3 ℃ or the same as the atmospheric temperature in cloudy days and nights.The paint has a good waterproof and anti leakage effect on objects with small cracks. The paint has a variety of colors to choose from, and can be painted with different colors at room temperature according to different color requirementsCooling coatingIn addition, the coating is smooth and flat after brushing, with good hydrophobicity and self-cleaning performance, so the room temperature cooling coating is a new type of room temperature cooling energy-saving long-life coating that integrates efficient cooling, thin layer, decoration, self-cleaning, waterproof, moisture-proof, anti ultraviolet aging, acid and alkali resistance, and anti-corrosion.
Vigorously developing fields
The high-tech solar reflective coating used for aerospace and aircraft adds a safety insurance to the tank farm operation.
It is understood that when the temperature reaches more than 30 degrees Celsius in summer every year, some large factories prevent equipment from being damaged outside, which requires spraying and cooling operations. Traditional coatings are difficult to meet the requirements for environmental temperature.This new type of coating has the characteristics of reflecting solar energy and effectively reducing surface thermal radiation temperature.When it is used on the flammable and explosive outer wall, it can reflect solar energy significantly, effectively reduce temperature, save a lot of water resources, and improve safety.
