How do safety films work in general, and 3M window security films specifically?
Safety films in general mitigate the dangerous effects of projectile glass during accidental and intentional glass breakage, such as natural disasters, terrorism and burglary attempts. Once installed to the interior surface of glass, safety films help hold broken glass together on the film upon impact to prevent airborne pieces from harming people and damaging property. Safety films consist of one or more layers of polyester film laminated together to form a tough, resilient product. The safety series of 3M window film works towards the same principle: to help keep shattered glass within the frame and prevent harmful shards from becoming airborne. These films are constructed of multiple layers of film, somewhat similar to plywood with the layers alternating direction. This gives the 3M security films the greatest tear resistance while maintaining a fantastic view.
