1. Defects of polyurethane: 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: it endangers the environment, breeds bacteria, has high water absorption, poor thermal insulation effect, poor strength and short service life;
4. Advantages of phenolic: non combustible, no toxic gas and smoke after combustion, low thermal conductivity, good thermal insulation 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 superior to polystyrene foam;
6. It can be used at – 200 ℃ ~ 200 ℃ for a short time and 140 ℃ ~ 160 ℃ for a long time. It is superior to polystyrene foam (80 ℃) and polyurethane foam (110 ℃);
7. Phenolic molecules contain only carbon, hydrogen and oxygen atoms. When subjected to high-temperature decomposition, it will not produce other toxic gases except a small amount of CO gas. The maximum smoke density is 5.0%. After the 25mm thick phenolic foam board is subjected to flame spraying at 1500 ℃ for 10min, only the surface is slightly carbonized but it can not burn through, neither will it catch fire nor emit thick smoke and toxic gas;
8. Phenolic foam is resistant to almost all inorganic acids, organic acids and organic solvents except that it may be corroded by strong alkali. Long term exposure to sunlight, no obvious aging phenomenon, so it has good aging resistance;
9. The cost of phenolic foam is low, which is only two-thirds of that of polyurethane foam.
Post time: Sep-13-2022