Method of perforating preforms coated with a plastic film.

摘要

To provide a method of perforating preforms in the form of deep-drawn textiles coated with a plastic film and foam-backed, in particular as a lining or insulating material for motor vehicles, with which the plastic film can be perforated as simply and inexpensively as possible, the film is to be subjected to hot air under pressure punctually in the region of the perforated openings to be produced, so that the film melts punctually and is adhesively bonded to the material lying behind it, forming a perforated opening. ……