聚氨酯保温板检测

Advantages of polyurethane: 1: high efficiency thermal insulation because the thermal conductivity of the foaming agent used in polyurethane is much lower than that of air (good thermal insulation), Therefore, the thermal insulation performance of polyurethane rigid foam is better than that of air-only materials such as mineral wool, glass fiber and polystyrene. Moreover, its unique obturation and high gas diffusion resistance make it have excellent long-term insulation performance, and its thermal insulation performance can last for 20 to 50 years or more. 2: excellent corrosion-resistant polyurethane rigid foam closed-cell structure and the use of surface materials, so that it has a better air resistance and moisture resistance, and it can be made into a mosaic connection structure, easy to be assembled. It does not require additional insulation moisture-proof, saving a lot of trouble in laying insulation. These properties are not available at the same time of other insulation materials. 3: wide, light and thin wall because polyurethane rigid foam acts as a structural material at the same time, the overall structure has the advantages of light weight, large span and high load. Compared with other insulation materials, polyurethane rigid foam has the best thermal insulation performance. Therefore, the thinner polyurethane sandwich plate can meet the relevant regulations on the limit of building energy consumption, so as to allow the use of thinner plate during construction and save building space. 4: stable quality, high production efficiency now, in the case of sharp rise in demand, polyurethane sandwich panel factory production line, in addition to convenient control of quality, but also brings it a good economy and competitiveness. 5: good weather resistance, easy to install polyurethane sandwich panels in the factory prefabricated, can be directly used for construction installation, no additional procedures, fast construction. And do not need to take into account the changes in the weather, according to the plan for production. The shortcomings of polyurethane: 1: insulation board formula, ratio is messy, unstable, resulting in poor physical stability of the plate, insulation effect is not good; 2: spraying construction has not yet been solved, it is difficult to ensure the quality of the project. The advantages of XPS board are as follows: 1. The XPS board has a dense surface layer and closed pore structure inner layer. Its thermal conductivity is much lower than that of EPS, with the same thickness, so it has better thermal insulation performance than EPS. For the same building exterior wall, its thickness can be smaller than other types of thermal insulation materials. 2. Due to the closed pore structure of the inner layer. Therefore, it has good moisture resistance, in wet environment, can still maintain good thermal insulation performance; suitable for cold storage and other buildings with special requirements for thermal insulation, can also be used in exterior wall facing materials for brick or stone buildings. 3. Light texture and easy to use: the completely closed cell foaming chemical structure and honeycomb physical structure of XP board make it have the characteristics of light weight and high strength, easy to cut and transport, not easy to damage and easy to install. Because the extruded polystyrene and the base wall should be fixed by mechanical fixation. Construction can be carried out as usual in winter. 4. Good stability and anticorrosion: in use for a long time, it does not aging, does not decompose, does not produce harmful substances, its chemical properties are extremely stable, and will not degrade due to water absorption and corrosion, resulting in a decline in its performance. It can still maintain its superior performance in high temperature environment. According to relevant information, XPS extruded insulation board can maintain excellent performance even if it has been used for 30 to 40 years, and there will be no decomposition or mildew, and there is no volatilization of toxic substances. The shortcomings of XPS are as follows: 1. The strength of XPS board itself is high, resulting in plate brittleness, not easy to bend, stress concentration on the plate, easy to damage and crack. 2. 2. Poor air permeability, almost airtight, if the temperature difference between the two sides of the board is large, high humidity is easy to dew. 3. Because the surface of the plate is smooth, the interface treatment and brushing are needed during the construction. The woolen panel is not in this column. The bond between 4.XPS board and plastering mortar is not firm and easy to fall off, and the shedding of external ceramic tile is faster and more serious. Phenolic board performance characteristics phenolic board advantages: 1. Excellent fire performance: phenolic foam insulation board has phenolic insulation board fire non-flammable, the highest combustion performance up to class A, the highest operating temperature of 180 ℃ (allowed instantaneous 250 ℃), The flame resistance of 100mm thick phenolic foam can reach more than 1 hour without being penetrated. Under the direct action of flame, it has the phenomena of carbon deposition, no dripping, no curling and no melting. After flame combustion, a layer of "graphite foam" is formed on the surface of the flame, which effectively protects the foam structure in the layer. 2. Excellent thermal insulation properties: phenolic foam insulation board has low thermal conductivity (< 0.025W/ m ·K, more than 2 times that of polystyrene, similar to polyurethane), so it is an excellent material for thermal insulation and thermal insulation. 3. Corrosion resistance and aging resistance: phenolic foam insulation board can resist the erosion of almost all inorganic acids and organic solvents. Long-term exposure to sunlight, there is no obvious aging phenomenon, so it has good aging resistance. 4. Low density and light weight: the density of phenolic foam insulation board is less than 100 / m3, which can reach about 50 / m3. It can reduce the self-weight of the building, reduce the load of the building, reduce the structural cost, and the construction is simple and fast, and the work efficiency can be improved. 5. Sound absorption property: phenolic foam insulation board has excellent sound absorption performance, and the open foam structure is more favorable for sound absorption. 6. Environmental protection: phenolic insulation board uses fluorine-free foaming technology, no fiber, in line with national and international environmental protection requirements. Phenolic board shortcomings: fire resistance grade B, up to A2 grade, but increased cost. In order to increase its compressive and tensile strength, it is generally affixed with a layer of inorganic board or grid cloth on both sides. The use temperature is-60 ℃ ~ 150 ℃, can not be used at high temperature, in theory, he will resist high temperature variation, the high temperature mentioned here will never exceed 200 ℃, 200 ℃ is not high temperature, more than must have highly toxic smoke. 7. Organic matter can not resist aging, ultraviolet rays and other long-term effect, phenolic insulation board will lose its function and shorten its life.