TPU material has the characteristics of high tension, high tensile strength, and high toughness, which can effectively resist the damage to car paint caused by flying stones, parking scratches, etc. TPU color changing film also has self-healing function. Its self-healing principle is derived from the special coating layer composed of elastic memory repair material on the film surface, which blocks the erosion of car paint by ultraviolet rays, high temperatures, acid rain, etc., delays the aging and fading of car paint, has strong resistance to yellowing and ultraviolet rays, and can cope with various harsh environments, providing reliable protection for car paint