COMPOSITE WINDOWS AND DOORS

摘要

PURPOSE: Composite windows and doors are provided to minimize the damage to a human body since toxic gas does not occur at a fire. CONSTITUTION: Composite windows and doors comprise a window, a windowsill, a window frame(110), and an insulating panel. The window frame and the windowsill are formed from metal. The insulating panel is formed from styrene synthetic resin. The insulating panel is a foam for generating bubble. The insulating panel comprises a first protrusion(311), a second protrusion(322), and a third protrusion. The protrusions are protruded to the windowsill(210) to get out of the end of the window frame.