Composite paper is a composite processed paper made by laminating paper, cardboard, plastic, aluminum foil, cloth, and other materials together with adhesives. The production process includes wet, dry, thermal fusion, and extrusion composite methods, among others. The new technology adopts layered papermaking, pulp direct forming, and other techniques to achieve non-adhesive composite [2-3]. The material has characteristics such as waterproof, moisture-proof, oil-resistant, and gas-tight odor preservation, as well as heat-sealing and tensile resistance properties, suitable for industrial scenarios such as packaging and courier envelopes. Specifications: paper grade A type composite weight 60-300(g/m2)
