Paint knowledge | is reflective heat insulation coating a real heat insulation coating

Core tip: for a long time, many owners have misunderstood that the reflective thermal insulation coating on the market is the real thermal insulation coating In fact, today's editor will introduce the difference between the reflective thermal insulation coating and the real thermal insulation coating 1、 Thermal insulation coating is defined as a functional coating for the purpose of heat preservation, cooling and insulation Among them, barrier thermal insulation coating is to achieve the purpose of thermal insulation by blocking the heat transfer (through convection, radiation and molecular vibration heat transfer) In China, this kind of coating is mainly used for thermal insulation coating, mainly composite silicate thermal insulation coating But this kind of coating has a long drying cycle Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: for a long time, many owners have misunderstood that the reflective insulation paint on the market is the real thermal insulation paint In fact, today's editor will introduce the difference between the reflective insulation paint and the real thermal insulation paint 1、 Thermal insulation coating is defined as a functional coating for the purpose of heat preservation, cooling and insulation Among them, barrier thermal insulation coating is to achieve the purpose of thermal insulation by blocking the heat transfer (through convection, radiation and molecular vibration heat transfer) In China, this kind of coating is mainly used for thermal insulation coating, mainly composite silicate thermal insulation coating However, this kind of coating has some problems, such as long drying period, great influence of seasons and climate on construction, weak impact resistance, high moisture absorption rate, insufficient bond strength to wall, thick coating, large area hollowing caused by improper construction and insufficient decoration Another problem is that the heat in the system is not easy to disperse, so that the heat gradually accumulates, resulting in the high internal temperature of the system Therefore, at present, it is less used in thermal insulation coating for exterior wall Selective thermal reflective coating is a kind of heat insulation coating developed abroad in recent years, and its theoretical research is becoming more and more perfect It is a kind of coating mainly reflecting the near-infrared part of the sunlight It can reflect a lot of solar radiation without consuming electric energy, reduce the energy consumption of air conditioning, and has remarkable energy-saving effect It can be used for building roofs and glass curtain walls , offshore drilling platforms, oil tanks, oil pipelines, automobiles, trains, aircraft surfaces, ship hulls, plywood and tanks, warships, rockets and spacecraft But our country is still in the stage of research and development In order to achieve a good effect of thermal insulation coating, the above two or more thermal insulation mechanisms need to work together This is a development direction There are such products in foreign countries It is a kind of solvent based composite thermal insulation coating made by multi-component modification and copolymerization of polymer In addition to its good functions of protection and decoration, weather resistance, thermal insulation, physical and chemical properties and infrared reflection, this coating has a solar heat reflectivity of more than 80% Compared with the general lead powder coating, its surface temperature is higher It can be reduced by more than 10 ℃ In addition, thin-layer reflective thermal insulation coating, water-based reflective thermal insulation coating, vacuum thermal insulation coating, coating containing nano or below nano microporous structure and thermal insulation coating made of nano materials will be the hot spot of development in the next stage At present, foreign countries have taken the lead in this field 2、 The classification of thermal insulation coating 1 The reflective thermal insulation coating is developed on the basis of aluminum based thermal insulation coating By selecting suitable resin, metal or metal oxide filler and production process, a high reflective thermal insulation coating is prepared, reflecting solar heat to achieve the purpose of coating thermal insulation Because sheet metal can exist stably for a long time in solvent coatings, but not in water-based systems, most of the reflective insulation coatings are solvent systems However, water-based is the development trend and inevitable destination of thermal insulation coatings, so it has become one of the hot spots in the research of thermal insulation coatings at home and abroad that metal sheet is specially treated or not used Dibutyl maleate vinyl acetate copolymer was used as the film-forming material, and a kind of pearlescent heat insulation agent was added to prepare the water-based heat insulation coating with excellent heat insulation performance Zhang Min used flake aluminum powder as pigment to make a kind of water-based reflective heat-insulating coating with excellent comprehensive performance When the temperature is as high as 35-37 ℃, the temperature inside the coating can be reduced by 11-13 ℃ 2 The difference between reflective heat-insulating coating and real heat-insulating coating is due to the growth of the market and the success of the coating industry, more and more methods of use are also emerging However, what is the meaning of thermal insulation coating? If the white coating is applied on the roof, and then compared with the ordinary black roof, can it be said that the white coating has the thermal insulation performance of coating? No, it only means that the thermal insulation coating has the reflection function, and because of the function, the thermal insulation coating can reduce the indoor temperature to a certain extent But from another point of view, the coating has insulation ability, but the fact is that heat is reflected by the insulation coating before penetrating into the room Probably that's why the same effect can be achieved with a low cost white coating The product shall be defined as reflective roof coating Therefore, we should be careful when choosing thermal insulation coating If it's just to reduce the sun's heat on the roof, it's not a real insulation coating, reflective roof coating is enough (but before they get dirty) By applying paint to the roof to reduce the reflectivity of sunlight (dazzling white), all you need is a thick layer of white paint But in fact, all you have is reflective roof paint, not insulation paint If it is used for roofs, reflective roof coatings may be able to meet your requirements In addition to the relatively low ambient temperature, the use of real insulation coating may appear uneconomical Summary: the real thermal insulation coating is a kind of coating which can produce (both sides of its surface) temperature difference in any situation In particular, it contains a kind of encapsulation particles, which can capture air, make the thermal insulation coating have the characteristics of insulation function and low radiation, that is to say, the thermal insulation coating is composed of a viscous, light wet coating by mechanical means (less than 0.75kg per liter) On the contrary, when the reflective roof coating contains resin and solid particles, such as titanium dioxide, calcium carbonate and other filler materials (with natural reflection ability), the reflective roof coating weighs about 1-1.4 kg / L When the coating is applied at high temperature, it is likely that the thermal insulation performance of the coating will be greatly reduced, and bubbles will be generated, or even fall off When so-called competitors don't understand these limitations, the reputation of real insulation coatings may be affected Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,