The surface coating of the battery box not only requires good surface leveling and good adhesion, but also requires mechanical properties that are not cracking and resistant to chemical agents. Therefore, it is necessary to consider the MI value, tensile property, stress cracking, chemical agent resistance and other aspects in the formulation design of polyethylene powder coating. Generally, the higher the MI value of polyethylene, the lower the molecular weight, the worse the performance is often. By blending modification, polyethylene powder coatings that meet the surface leveling requirements and have superior film performance are prepared.
