Thermal insulation coating is a relatively new type of functional coating in recent years. It is mainly used for building surfaces to achieve the function of reducing the internal temperature of the building and reducing energy consumption. And thermal insulation coating is a kind of functional coating that is sun-proof, heat-insulating, energy-saving, environment-friendly, simple in construction, and effective. The following small series introduces the principle of thermal insulation coatings and types of thermal insulation coatings.
Thermal insulation coating principle
1. Reflective heat insulation coatings and high temperature heat insulation coatings inhibit solar radiant heat, infrared radiant heat and shielded heat conduction, and their thermal performance is superior to other heat insulating materials.
2. Reflective heat insulation coatings and heat-resistant heat insulation coatings can be used in places where volume and weight are limited. (Recognized) 1mm thick reflective heat insulation coatings and high temperature heat insulation coatings reflect all heat About 90% to 95% of radiation is equivalent to a 10 mm thick styrofoam with an R value of 20.
3ã€Reflective insulation coatings and high temperature insulation coatings have excellent functions of moisture-proof and waterproof vapor, which can impede vapor condensation and prevent the oxidation of insulation surfaces (such as steel pipes, boilers, etc.). It is also important that The thermal insulation will not decrease when exposed to moisture.
4, when the sun is strong, the paint can reduce the surface temperature of the object above 20°C, and the temperature can be reduced above 3°C on cloudy days and nights, or it can be reduced to the same temperature as the atmospheric temperature.
Thermal insulation type
1, barrier insulation coating
Barrier thermal insulation coatings are coatings that achieve thermal insulation through low thermal conductivity and high thermal resistance. This type of paint was developed at the end of the 1980s and has different product names, such as composite magnesium aluminum heat insulation coatings, rare earth heat preservation coatings, and coating type composite silicate heat insulation coatings. It is an insulating coating made of inorganic and/or organic binders, insulating aggregates (such as sepiolite, vermiculite, perlite, etc.) and air entraining agents.
2, reflective insulation coating
Reflective thermal insulation coatings are based on aluminum-based reflective thermal insulation coatings. By selecting suitable raw materials and formulas, high reflectivity coatings are produced to reflect sunlight and achieve thermal insulation. Thin layers of heat-insulating reflective coatings are representative of such coatings. It consists of the base material, heat reflective pigments and additives. This kind of thin layer thermal insulation reflective coating has high thermal reflectivity, generally more than 80%, and the heat insulation effect is obvious. However, as described above, the color has a great influence on the thermal reflectance.
3, radiation insulation coating
Radiant thermal insulation coatings emit solar energy absorbed by buildings in the form of long waves into the air in the form of radiation, so as to achieve the effect of heat insulation and temperature reduction. As an exterior paint, high emissivity is required. The emissivity of organic coatings is generally 0.80~0.90. The key to exterior wall thermal insulation coatings is to prepare coatings with high thermal emissivity.
Editor's summary: The principle of thermal insulation coatings and types of thermal insulation coatings are introduced here, and we hope to be helpful to everyone. If you want to know more about yourself, you can follow the information on this site.
Waterproof and heat insulation coatings
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