Abstract: A multilayer blow-molded board comprises an upper layer board and a lower layer board to form a hollow structure. Each of the layer boards comprises an outer layer and an inner layer. The present disclosure has the following advantages: the lower layer board is recessed upward so that the inner layers of the board and the upper layer board fuse with each other to form a supporting contact structure, resulting in enhanced structure strength. Furthermore, the outer layer of the board can utilize a strong surface-strength material whereas the inner layer can utilize a low thermoplastic-shrinkage-rate material to provide a frame support. In addition, a tough and flexible material is adopted for the intermediate layer to improve the overall structural strength of the blow-molded board.

Abstract: A multilayer blow-molded board comprises an upper layer board and a lower layer board that are blow-molded to form a hollow structure. Each of the upper layer board and the lower layer board comprises an outer layer and an inner layer. The lower layer board is recessed upward so that the inner layers of the lower layer board and the upper layer board fuse with each other to form a supporting contact structure.