Principle

Impact resistance of plastic films to a free-falling dart

The test method is used to determine the energy that causes a plastic film to fail under specified conditions of impact of a free-falling dart.

This energy is expressed in terms of the weight (mass) of the missile falling from a specified height.

Testing procedure

A plastic film with a diameter of 100 mm is fixed onto the test frame.

A rounded dart with a well-defined weight is released from a predetermined height onto the film.

The combination of height and weight indicates the impact resistance

Testing applications

This test measures the impact resistance of plastic films.

Packaging Materials:

One of the biggest challenges for plastic bag producers is developing advanced technologies that reduce costs and increase impact resistance of the packaging material that may be subject to impacts during manual movements.

QA/QC on Finished Plastic Product:

Fabricating process can influence the impact strength. The flow behaviours of the material during the filling mould, specimen geometry, impact properties of the unoriented material are important in governing the impact behaviour. Therefore the impact strength of the finished product may need to be tested in the usual QA/QC.