AT305A Electric Falling Dart Impact Tester (original HY4241-I) is used to determine the impact resistance by free-falling dart method. It can be used for plastic films, sheets and composite films e.g. PE preservative films, wrapping films, PET sheets and other food package and heavy package, aluminum foils and aluminum plastic composite films, paper and paper board etc. It can meet the request both of method A and method B.
Before starting the test, choose test method, and estimate an initial mass and Δm. Start the test. If the first specimen fails, decrease the mass of the falling dart by Δm. If the first specimen is not a failure, increase the mass of the falling dart by Δm. Continue the test according to this rule. In brief, increase or decrease by Δm according to whether the former specimen is a failure or not. After 20 specimens, calculate the total number of failed specimens N. If N equals to 10, the test is over. If N is less than 10, add specimens and continue to test until N equals to 10. If N is greater than 10, add specimen and continue the test until the number of non-failure specimens reaches 10. Then the tester calculates the test results automatically according to specific formulas.
★ It consists of falling dart, elevating mechanism, dart release mechanism, working table, electric cabinet, etc.
★ Two test methods of A & B according to standard specifies
★ Pneumatic clamping, convenient and reliable
Inside diameter of specimen clamp