Equipment use: HY4250 film pendulum impact testing machine is mainly used for the determination of plastic, rubber and other non-metallic materials impact toughness. The test machine for research institutes, enterprises and non-metallic materials such as quality inspection departments to use. This machine is a simple structure, convenient operation, high precision instruments. ? Executive Standard: GB8809, etc. Working Principle: This instrument through semicircle dome punch a certain impact velocity impact and break through the sample in order to measure the energy consumed by the punch, take this energy to evaluate the thin film sample anti-swing hammer impact energy values. ? Technical parameters: Instrument Model HY4250 maximum impact energy 3J 0.025J minimum scale value of the angle of 90 ° pendulum swing radius R280 mm impact speed 2.5m / S impact head size ￠ 25.4 mm ￠ 12.7 mm diameter sample holder ￠ 50 mm ￠ 60 mm ￠ 89 required sample size 100 mm X 100 mm