1. Defects of polyurethane: it is easy to burn in case of fire and produce toxic gas, which is harmful to human health;
2. Defects of polystyrene: it is easy to burn in case of fire, shrinks after long use, and has poor thermal insulation performance;
3. Defects of rock wool and glass wool: they endanger the environment, breed bacteria, have high water absorption, poor heat insulation effect, poor strength and short service life;
4. Advantages of phenolic resin: nonflammable, no toxic gas or thick smoke after combustion, low thermal conductivity, good thermal insulation, sound insulation, good weather resistance, and a service life of up to 30 years;
5. It has uniform closed cell structure, low thermal conductivity, good thermal insulation performance, and is equivalent to polyurethane, superior to polystyrene foam;
6. The applicable temperature range is wide. It can be used at – 200 ℃~200 ℃ in the short term and 140 ℃~160 ℃ in the long term, superior to polystyrene foam (80 ℃) and polyurethane foam (110 ℃);
7. Phenolic molecule only contains carbon, hydrogen and oxygen atoms. When it is decomposed at high temperature, except for a small amount of CO gas, no other toxic gas will be generated. The maximum smoke density is 5.0%. The 25mm thick phenolic foam plate, after being sprayed with a flame at 1500 ℃ for 10min, only slightly carbonized on the surface but could not burn through, neither would it ignite nor emit thick smoke and toxic gas;
8. In addition to being corroded by strong alkali, phenolic foam is resistant to almost all inorganic acids, organic acids and organic solvents. Long term exposure to the sun, 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: Nov-15-2022