What are the kinds of fire door core board?
Organic thermal insulation material, fire door core is such as EPS (foam polystyrene), XPS (extrusion foaming polystyrene), foam PVC, foam PE, foam PUR and sponge rubber as raw materials and other products. But because of flammability and combustion of organic materials to produce VOC, hinder the application of these materials, this also appeared over the pursuit of improve flame retardant properties of organic materials, and enhance the level of fire safety phenomenon, it not only greatly increased the cost of materials, at the same time as the non environmentally friendly flame retardant are on fire the process will increase the amount of smoke and smoke toxic materials, fire may bring greater harm, so the organic material as the core material of the fire door is not desirable.
The inorganic glass magnesium fireproof door core is an inorganic fireproof door core made of Magnesium Oxide and magnesium chloride as cementing material, expanded perlite as filler and foaming. "The building fire prevention design specification" (GB 50016-2006) pointed out, magnesite (magnesium oxychloride) limit refractory pearlstone hollow slat wall material is 1.30h, is not the burning body. According to the test of GB/T9978-2008 on the magnesium oxychloride wall material, the fire resistance of the wall material is completely consistent with the requirements of heat insulation and integrity in 110min, and the fire resistance is 1.83h. Experiments show that the air entraining agent for manufacturing foaming of foamed magnesium cement under the normal temperature and pressure, the density (dry) is 32020kg/m3, the thermal conductivity is 0.076~0.09W/ (M - K), 1.5~2.1MPa compressive strength and softening coefficient is less than 0.6, the surface without powder, shedding dregs phenomenon. Therefore, the inorganic magnesium board with fireproof, heat insulation, excellent mechanical properties, environmental protection, energy saving and economical production cost, filling a fireproof door core material, has the absolute advantage.
Inorganic fireproof insulating material, fire door core, such as rock wool, mineral wool, glass wool, aluminum silicate cotton, asbestos, expanded perlite, expanded vermiculite products, foam glass, microporous calcium silicate products. Inorganic materials are far better than organic materials and fire insulation performance and smokeless toxic performance, but there are some limitations, some non compressive degrees, must be attached to support carrier, carrier and brought fire and burning smoke toxicity problems, such as rock wool, mineral wool, glass wool, cotton, aluminium silicate asbestos is such; some high prices, the production of high energy consumption, such as foam glass, microporous calcium silicate in the case of such refractory; some itself is not high, moisture absorbent is large, such as cement or water glass based products, perlite cement or water glass based products, products such as vermiculite foam concrete is such, therefore restricted to varying degrees as the filling core material of the fire door.
