Comparison between the hottest phenolic insulation

2022-08-09
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Comparison between phenolic insulation board and other insulation materials

phenolic insulation board is a new type of green environmental protection material. It is a closed cell hard foam plastic made of phenolic precise stop process adjustment and consumption control resin with flame retardant, smoke suppressant, foaming agent, curing agent and other additives. Its long-term service temperature is -250 ℃ ~150 ℃, it will not burn in case of fire, and it will not melt droplets, soften and carbonize the surface under high temperature environment. The thermal conductivity of phenolic insulation board is only about 0.023w/m.k, which is almost the same as polyurethane, and the thermal insulation performance is very good. Its most prominent features are fire-resistant, low smoke, and high-temperature disproportion resistance. It can be cast and foamed on site, molded or machined, and can be made into plates, tubes and shells and various special-shaped products. It overcomes the shortcomings of the original foamed plastic insulation material, such as flammability, smoke and deformation in case of heat, and retains the characteristics of the original foamed plastic insulation material, such as light weight and convenient construction. Phenolic board has abundant raw materials, low price, simple production and processing, and widely used products. It is suitable for large-scale cold storage, storage tanks, ships, various insulation pipelines and construction industries. If it is used in factories, mines and mechanical equipment with strict fire prevention requirements, its characteristics of flame retardancy, low smoke and high temperature disproportion resistance can be highlighted. For example, the heat preservation of ships, warships, trains, armored vehicles and papermaking, chemical industry, pharmaceutical and other aspects

performance comparison of various insulation materials of phenolic insulation board:

1. Defects of polyurethane: it is easy to burn in case of fire, easy to produce toxic gas, and endanger human health

2. Defects of polystyrene: easy to burn in case of fire, shrink after long use, and poor thermal insulation performance

3. Defects of rock wool and glass wool: harmful to the environment, breeding bacteria, high water absorption, poor insulation effect, poor strength, short service life

4. Advantages of phenolic: non combustible, no toxic gas and smoke after combustion, low thermal conductivity, good heat preservation effect, sound insulation, good weather resistance, and service life of up to 30 years

5. It has uniform closed cell structure, low thermal conductivity and good thermal insulation performance, which is equivalent to polyurethane and better than polystyrene foam

6. The applicable temperature range is large. It can be used at -200 ℃ ~200 ℃ in a short time and at 140 ℃ ~160 ℃ for a long time, which is better than polystyrene foam (80 ℃) and polyurethane foam (110 ℃)

7. Phenolic molecules only contain carbon, hydrogen and oxygen atoms, accounting for 6% of the total export volume of extruders in China when subjected to high-temperature decomposition. Except for a small amount of CO gas, no other toxic gases will be produced, and the maximum smoke density is 5.0%. After the 25mm thick phenolic foam board is subjected to 1500 ℃ flame spray for 10min, only the surface is slightly carbonized but cannot burn through, which will neither catch fire nor emit dense smoke and toxic gas

8. Except that phenolic foam may be corroded by strong alkali, it can resist the erosion of almost all inorganic acids, organic acids and organic solvents. Long term exposure to sunlight, no obvious aging phenomenon, so it has better aging resistance than ductile metals

9. The cost of phenolic foam is low, which is only equivalent to two-thirds of that of polyurethane foam

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