1results about How to "High char formation rate" patented technology

Provided are a continuous flat pressing surface layer flame-retardant particle board and a preparation method thereof, which can reduce the burning growth rate index of the flame-retardant particle board and the influence of the flame retardant on the surface bonding strength of the particle board. The method comprises: simultaneously atomizing and applying, to raw material particles, 10-15% of the mass of the particles of a melamine modified urea-formaldehyde resin adhesive and 0.5-0.8% of the mass of the particles of a sodium hydroxide aqueous solution with a concentration of 0.4-0.6 mol / L to obtain pretreated surface layer particles, and blending the surface layer particles with a surface layer flame retardant PAP-Mg-Zn at a mass ratio of 100:15-17 to obtain flame-retardant surface layer particles; and laying the flame-retardant surface layer particles and core layer particles in a manner that the surface layer particles are in the upper and lower layers and the core layer particles are in the middle layer, and then continuously flat pressing the board blank at a hot pressing speed of 220-250 mm / s to obtain the continuous flat pressing surface layer flame-retardant particle board. The structural formula of PAP-Mg-Zn is as follows.