2022.12.05
Expansion introduction:
From the comparison of heat resistance, generally speaking, when thermosetting insulation materials encounter high temperature or open flame, foam carbonization, non-melting, and no molten drops are produced by thermosetting foam board equipment falling objects, while thermoplastic insulation materials encounter high temperature or open flame, the foam body shrinks and melts. When burning, the eps machine has molten drips.
Although thermosetting and thermoplastic insulation materials have different molding processes, they are all organic insulation materials. For example, common thermosetting insulation materials include phenolic foam and polyurethane rigid foam, and common thermoplastic insulation materials include polystyrene foam (EPS, XPS).
Among them, phenolic foam is an ideal thermosetting thermal insulation material. The combustion grade of the thermosetting foam sheet machine of phenolic foam is B1-A grade, and the combustion grade of ordinary polyurethane rigid foam is B2 grade. After adding flame retardant, it can reach B1 grade, and the price Expensive, the price of 40kg/m³ phenolic board is only 400 yuan/m³, only slightly higher than XPS, EPS, and the flame retardancy advantage is very large.
In addition, the “Code for Fire Protection Design of Buildings” that came into effect on May 1, 2015 clearly pointed out that “the internal and external insulation systems of buildings should use insulation materials with a combustion performance of A grade, and B2 grade insulation materials should not be used, and B3 grade insulation materials are strictly prohibited.” Materials; the fire resistance limit of the base wall or roof panel with the thermal insulation system shall comply with the relevant provisions of this code.” Completely end the era of polystyrene boards.
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