Dry expanded paper and manufacturing method thereof

The invention is suitable for the technical field of expanded paper, and provides dry expanded paper and a manufacturing method thereof.The dry expanded paper is composed of wood pulp fibers and thermal bonding chemical fibers, functional powder is evenly distributed in the dry expanded paper, and the mass ratio of the wood pulp fibers to the thermal bonding chemical fibers to the functional powder is (2-5): (2-3): 1; the functional powder comprises the following raw materials: modified chitosan, modified polyethylene glycol, modified nano bentonite, paeoniflorin and modified zein, the performance of the dry expanded paper is improved by adding the functional powder, the antibacterial property, the mechanical property and the adsorption property are improved by adding the modified chitosan, and the dry expanded paper has the advantages that the dry expanded paper has the antibacterial property, the mechanical property and the adsorption property; the modified polyethylene glycol is added to achieve good adsor