Cast Thinner PET Film Faster Than Ever

Unoriented polyester film typically cannot be produced much thinner than 150 microns without running very slowly to avoid breaking the web.

Unoriented polyester film typically cannot be produced much thinner than 150 microns without running very slowly to avoid breaking the web. But now, SML Extrusion Technology in Austria (U.S. office in Kennesaw, Ga.) and one of its customers have developed a proprietary die and casting unit that for the first time reportedly can run PET film as thin as 18 microns at speeds up to 180 meters/min. The customer and co-developer has exclusive use of the technology until the fall of 2006. Previously, the only process that came close was from Bruckner Formtec in Germany (U.S. office in Greenville, S.C.), which casts PET film as thin as 80 microns at 100 m/min.