2022.11.02
From the perspective of heat resistance, generally speaking, when the thermosetting thermal insulation material encounters high temperature or open fire, the foam will be carbonized, non-melting, and non-melting and dripping. Melting, molten dripping occurs during incineration.
Thermosetting and thermoplastic insulation materials are organic insulation materials, although the equipment technology for forming thermosetting foam boards is different. Such as: more common thermosetting thermal insulation materials are phenolic foam, polyurethane rigid foam, more common thermoplastic thermal insulation materials are polystyrene foam (EPS, XPS).
Among them, phenolic foam is a relatively ideal thermosetting thermal insulation material. The combustion grade of phenolic foam is B1-A, and the combustion grade of ordinary polyurethane rigid foam is B2. After adding flame retardants, it can reach B1, and the price is expensive, 40kg/ The price of m³ phenolic board is only 400 yuan/m³, which is only slightly higher than XPS and EPS, and the flame retardancy advantage is very large.
In addition, the “Building Design Fire Protection Standards”, which was implemented on May 1, 2015, clearly pointed out that “the internal and external thermal insulation systems of the building should use the thermal insulation materials with the incineration performance of the A-level, not the B2-level thermal insulation materials, and the B3-level insulation materials are prohibited. Insulation materials; the fire resistance rating of the base wall or roof panel where the thermal insulation system is installed shall comply with the relevant provisions of this standard “to completely end the age of polystyrene panels.
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