Patent – Easy opening

 Easy opening through diverging spiral tearing.

Packaging films are torn open in a diverging exponential fracture if starting from a specific but relatively simple starting notch. A very large opening is then created (see video below)

Here there is no special preparation on the film (or added guiding structure) : the spiral is really a natural path which is triggered by a specific initial condition. General propagation rules are described in this article.

joint patent CNRS/USACH/UCHILE.
Contact : benoit.roman[at]