INSTRON Drop Impact Tester (Falling Weight Impact Tester) the main ISO and ASTM standards for impact test of plastics are ASTM D3763 multi-axial impact test, ISO 6603 for the puncture resistance test method, ASTM D7136 for the CAI (compression after impact) test method, ISO 11343 for the wedge peel impact test method and ISO 8256 for the tensile impact test method.