1. The material of the iron drum is steel, and the steel plate is required to be flat and uniform in thickness. Compared with the plastic drum, it has better chemical resistance and process performance, but the probability of leakage is higher. The plastic barrel is made of high-molecular plastic HDPP. Compared with steel, its advantages are light weight, low cost, waterproof and moisture-proof. Due to one injection molding, the probability of leakage is much lower than that of iron barrels. The addition of modified materials With the improvement of injection molding process, the barrier properties, flexibility and impact resistance of the barrel body are also higher than that of steel, which is enough to bear the impact during packaging and normal transportation. 2. The process technology involved in the manufacturing process of iron drums is relatively complex, which requires sheet material uncoiling and leveling, welding edge processing, barrel body welding, barrel body flanging, barrel body expansion, roll packaging and packaging, barrel bottom cover forming and Pre-rolled, surface treated, painted on the inside and painted on the outside. The manufacture of plastic barrels is relatively simple, the surface printing treatment is relatively simple, and the appearance grade is relatively high. The production only requires one injection molding process, which greatly reduces the production cost. 3. The recycling and use of iron barrels also need to be returned to the furnace for steelmaking and recycling, while the plastic barrels only need to be crushed and cleaned, then re-injected and used, and the cost of recycling is much lower than that of iron barrels. With the rapid development of the plastics industry and the continuous introduction of various new technologies and new plastic materials, plastic packaging barrels conform to the national environmental protection development strategy in the packaging field, and the share and influence will continue to increase.