Paint film impact resistance, what is impact resistance?

Film impact resistance, also known as impact resistance strength, refers to the ability of the film coated on the substrate to deform under the action of high-speed gravity but the film does not crack and peeling, which reflects the flexibility of the tested film and the adhesion to the substrate. Commonly used impact test instrument detection, with a certain mass of heavy hammer falls on the paint film template, so that the film is subjected to elongation deformation without causing damage to the maximum height, with the weight mass and height of the product of the film Impact performance, usually N.cm.