Kraft cardboard is the most used type of cardboard in the production of cartons. The kraft paper selected by Kunshan Aircraft Box Company must have a tough texture, high requirements for burst resistance, ring compression strength tearing, also High water resistance. If the corrugated base paper is selected, it needs to have good fiber bonding strength, smooth paper surface, good tightness stiffness, certain elasticity to ensure that the produced cartons have good The seismic pressure resistance capability.