The present invention relates to a hollow box, characterized in that the hollow box comprises from outside to inside: a high-density polyethylene layer, a recycled material layer, an adhesive layer, a barrier layer, an adhesive layer and a high-density polyethylene layer. The hollow box further comprises at least one foaming layer arranged between any two of the six layers, and the foaming layer is formed by multi-layer co-extrusion foaming using thermoplastic plastic as a matrix material. The hollow box molded by the method can achieve heat insulation, sound insulation, pressure resistance, lightweight and other effects.
Country Code: CN
Application Number: CN201610776224.0
