Manufacture of flame retardant foaming board from waste papers reinforced with phenol–formaldehyde resin

A new flame retardant and waterproof porous fiberboard was manufactured from waste newspapers by using a foaming agent and a reinforcing phenol–formaldehyde resin. To find the optimum conditions for forming fiberboard with high mechanical properties as well as flame retardant and waterproof characteristics, a series of experiments were performed with varying weight percentages of resin (w). The results indicate that the best quality of the fiberboard was obtained for w∼11%.