Light flame-retardant fiber plate sandwiched phenolic foam composite plate and manufacturing method thereof

The invention discloses a light flame-retardant fiber plate sandwiched phenolic foam composite plate which comprises an upper face layer, a lower face layer and a core layer. Flame-retardant fiber plates are adopted as the upper face layer and the lower face layer, hard phenolic foam is adopted as the core layer, an enhanced adhesive layer is added between every two layers, and the enhanced adhesive layers are prepared from 70.0-80.0 parts of enhanced adhesive, 1.0-5.0 parts of curing agent and 15.0-25.0 parts of flour. The manufacturing process flow comprises the following steps that the hard phenolic foam is subjected to two-face gluing manually or through a gluing machine, and the phenolic foam subjected to two-face gluing is placed on the flame-retardant fiber plates for blank assembling. According to composite plate blank assembling, after hot pressing is carried out for 0.5-10.0 min at the temperature of 100 DEG C to 200 DEG C, the composite plate is output. The bonding strength of the composite plate is improved, and meanwhile the composite plate has the performance of being light, preserving heat, insulating heat, retarding flames and preventing fire. The manufacturing method of the composite plate can achieve mechanical/automatic production, and the remarkable advantages of being high in production efficiency, low in manufacturing cost, simple in production process, high and stable in product quality and the like are achieved.