Small medium-sized wood replacement cartons generally use three layers of corrugated cardboard (usually seven layers); heavy-duty packaging boxes can be made through automatic production lines, they are fixedly connected with wooden pallets at the bottom of the box (in recent years, paper pallets non-full wood Combination tray). The paper pallet wholesale company uses two seven-layer corrugated cardboards to be glued together to make form a 14-layer overweight corrugated cardboard box, which can withstand large Ford trucks load more than 7.5 tons. Among the heavy-duty packaging cartons, there are also large-scale cartons that are made into octagonal prism shapes. In addition, the bottom lid of the octagonal shallow disk are glued to form a heavy-duty packaging container after the packaging operation is completed. This avoids causing the multi-layer ultra-thick cardboard to break when the press line is folded into a box to form a right angle. This kind of large container carton in Japan contains plastic granular materials weighing 3.45 tons (the size of the box is 2.5 meters in diameter 2.3 meters in height).