What Kind of Exterior Wall Insulation Materials can Effectively Prevent Fires?

CHENGDU, China - Feb. 27, 2024 - PRLog -- In the early morning of the 24th, at a press conference held in Nanjing City, the Nanjing Fire Rescue Detachment reported that after preliminary analysis, the fire was caused by a fire in the electric bicycle parking area on the elevated floor of 6 buildings. In addition to illegal parking of electric bicycles, the fire resistance of the insulation materials of building exterior walls is also closely related to the spread of fire.

It is a good thing to lay insulation materials (https://www.sinoyqx.com/) on the exterior walls of buildings. It can keep heat in winter and insulate in summer, but fire safety cannot be ignored. Current insulation materials are divided into four grades: Class A (non-combustible), Class B1 (flammable), Class B2 (combustible) and Class B3 (flammable). Our country's "Code for Fire Protection Design of Buildings" has strict requirements for the use of materials. So what are the commonly used building insulation materials?

1. Polystyrene board: It has good thermal insulation performance, low price, and simple and convenient construction. Disadvantages: Poor fire resistance, generally B2.

2. Rock wool board: The main raw material is natural rock, so it has strong high temperature resistance. The thermal conductivity is very low and has good thermal insulation properties. The disadvantage is that the low surface strength causes the decorative surface to be uneven, which is particularly obvious under sunlight. At the same time, rock wool boards are particularly unfriendly to construction workers, and rock wool fibers make the skin itchy. The heavy weight of rock wool boards and poor construction techniques can easily cause the external insulation wall to fall off, causing safety accidents.

3. Melamine foam: Melamine foam is made of melamine foamed by microwave. Melamine itself is a flame retardant material with a nitrogen content of up to 70%. Therefore, melamine foam can achieve excellent flame retardant properties without adding any flame retardants.

Without the addition of flame retardants, melamine foam can meet the B1 low flammability material standard stipulated in Germany's DIN4102 and the American Insurance Institute's UL 94-V-0 high flame retardant material standard, and has passed the EU BS6853 and NFF16-101 , DIN5510 fire protection certification, and also complies with my country's GBIT8624-2006 B1 level flame retardant standard.

Melamine foam (https://www.sinoyqx.com/) is a three-dimensional lattice structure system with sufficient openings, the length-to-diameter ratio (L/D) of its lattice is in the range of 10-20, and the density of 8.5KG/M3 melamine foam has a high open-cell ratio of more than 99%. The fine three-dimensional grid structure makes the air convection heat transfer effectively prevented, coupled with the unique low thermal stability, so that it has a good thermal insulation and heat preservation effect (thermal conductivity, 0.035 W / (m * K))), become difficult to replace the lightweight thermal insulation materials.