Industry Evaluation of Radio Frequency Lamination
Materials Science & Technology 2011 Conference
Columbus, OH October 2011
Author: Shawn Allan
Co-authors: Morgana Fall, Nicholas Vandervoort, Dr. Holly Shulman
Radio Frequency (RF) Lamination enables rapid production of laminated glass products including transparent armor. RF lamination, which is performed using an RF press, eliminates the need for autoclaving. For transparent armor windows, process times are reduced from 6 to 18 hours, down to 3 to 8 minutes. A designed experiment was performed by laminating 35 to 45 mm thick, multilayer windows comprised of glass, acrylic, polycarbonate, and thermoplastic polyurethane interlayers. The effects RF parameters of process time, RF power, and pressure on adhesion strength, optical quality and ballistic performance were studied. Temperature labels allowed measurement of the thermoplastic polyurethane interlayer temperature at the various layers of the windows. A 180° peel test was used to measure adhesion. Finally, ballistic testing was performed with a 7.62 mm threat to evaluate the V-50 performance of the panels from the designed experiment. RF laminated armor windows performed as well as conventionally autoclaved panels.