Preparation method of flame-retardant heat-insulating interlayer for explosion door

Abstract

The invention discloses a preparation method of a flame-retardant heat-insulation interlayer for an explosion door, which comprises the following steps: s01, immersing polyurethane foam in a first modified solution, extruding the foam by using an extruder, and releasing the polyurethane foam; s02, repeating the step S01 for 5-10 times to enable pores of the polyurethane foam to be filled with the first modified solution, then taking out the polyurethane foam from the first modified solution, and extruding the first modified solution in the pores of the polyurethane foam to obtain the modified polyurethane foam A. The method is simple in operation process, the flame-retardant heat-insulating interlayer obtained by modifying the polyurethane foam by using the first modification solution, the second modification solution and the third modification solution has excellent flame-retardant property, and the use requirements are met. According to the method, the flame-retardant heat-insulating interlayer prepared from the polyurethane foam is light in mass, can reduce the mass of the explosion-proof door when being used in the polymer composite explosion-proof door, and is convenient to use.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant and heat-insulating interlayer used for an explosion-proof door, belonging to the field of civil air defense engineering safety. Background technique [0002] Blast-proof door is a kind of anti-blast protection equipment that can resist the explosion shock under certain conditions, dissipate the shock wave pressure generated by the explosion, absorb the impact kinetic energy of fragments, prevent penetration, and effectively prevent the explosion hazard from continuing to be affected by the blast wave. Explosion-proof doors are widely used in command rooms, civil air defense projects, explosives warehouses, inflammable warehouses, workshops, mines and other places. Especially the explosion-proof doors used in civil air defense projects can effectively resist and stop the shock waves generated by explosions and protect people's lives and property. [0003] Traditional explosion-proof do...

AI Technical Summary

Problems solved by technology

However, the surface density of the door composed of steel and concrete is greater than 450kg / m 3 , very heavy, making it very difficult to operate during installation, use, maintenance, and maintenance, and steel corrosion increases the difficulty of opening and closing the explosion-proof door

Therefore composite explosion-proof doors have appeared on the market, such as patent CN209212128U discloses a kind of SMC glass fiber reinforced composite material double-leaf civil air defense door, the door leaf of this civil air defense door adopts glass fiber reinforced sheet film plastics as the door leaf base material, and traditional steel Compared with the civil air defense door made of reinforced concrete, the civil air defense door has the advantages of light weight, good impact resistance, corrosion resistance, easy installation and maintenance, and good economy. However, in actual use, the fire resistance of the civil air defense door is relatively low. Difference