Natural fiber composite material plate capable of forming three-dimensional reinforced structure in one-time hot pressing process and manufacturing method of natural fiber composite material plate

Abstract

The invention discloses a natural fiber composite material plate capable of synchronously forming a reinforced structure in a one-time hot pressing process and a manufacturing method of the natural fiber composite material plate. The plate is composed of a base body layer composed of natural fibers and a resin base body and a reinforcing area formed by locally thickening and laying layers. Protrusions corresponding to the reinforcing structures are arranged in the mold, so that the laying layer is limited and formed in the hot pressing process and is integrally cured with the base body layer. The manufacturing method comprises the following steps: mixing the fibers and the resin matrix, laying the matrix area, locally thickening and laying the reinforced area, carrying out hot press molding by adopting a mold with bulges, and cooling and demolding. Through the synergistic effect of the local thickening laying layer and the mold protrusions, the plate can obtain a stable three-dimensional reinforcing structure without secondary machining, and therefore the bending rigidity and the buckling resistance are remarkably improved. The method has the advantages of simple process, short period and low cost, is suitable for thermoplastic resin or epoxy resin systems, and can be used for preparing lightweight composite material products such as automotive upholsteries, box body structural members, furniture panels and sports equipment.