Traditionally, transparent bulletproof windows are manufac- tured by laminating elastomer-like polycarbonate (PC) on mono- lithic glass using polyurethane (PU) and by connecting the various thicknesses of the glass using polyvinyl butyral (PVB) [6e8]. Although the glass is shattered after absorbing the impact energy of a projectile, the PC decreases the rotation speed of the projectile,