The cores used for color steel sandwich panels on the market mainly include phenolic foam, polystyrene, extruded polystyrene, rigid polyurethane, tri polyester and rock wool. Phenolic foam has excellent fire and thermal insulation performance, which cannot be replaced by other materials. For example, the thermal insulation effect of phenolic foam is more than twice that of polystyrene, and its fire resistance is also higher than that of polyurethane. When polyurethane burns, it will release thick smoke containing hydrogen cyanide.
The price of extruded board and polystyrene board will be cheaper than that of polyurethane board and phenolic board, but the thermal insulation and fire resistance are lower than those of polyurethane board and phenolic board.
In terms of thermal insulation effect, polyurethane board and phenolic board are equivalent. The R value of 10cm thick board at room temperature is 5, and the thermal conductivity is about 0.025. However, for the polyurethane board and phenolic board with the same fire protection grade of B1, the polyurethane board needs to be added with a large amount of flame retardant, and the price will be relatively higher. The fire resistance of phenolic is derived from genes.Because it is hard foam, its structure is stable, and it will not deform at high temperature and low temperature, which will not affect normal use.
Phenolic sandwich panels are gradually becoming the mainstream thermal insulation products, so phenolic color steel sandwich panels are a good choice.
Post time: Mar-17-2023