Many thermoplastic foils (e.g. PP) must be hot-perforated to ensure a high tear-strength. An electrically-heated needle roller, driven at web speed in combination with a heat resistant counter roller guarantee completely round holes with a clean well-formed rim.
This process fulfills the highest demands, combined with optimum functionality.
1. Perforation gaps lengthwise
Blank rings of any required width mounted between the needle segments create non-perforated longitudinal stripes.
2. Perforation gaps transverse
Pulling the web material away from the web material briefly interrupts the transverse perforation. For this purpose a high-dynamic servo drive moves the backup roller.
The user simply sets the width and position of the gap, which is accurate to the millimetre.If necessary, the gap can easily be synchronised to a printed image on the foil.