The outer layer of the plastic-steel fireproof window is mainly made of high-strength anti-oxidation plastic PVC, and the inner support is made of steel. Due to the use of aluminum-plastic materials, it is not easy to conduct heat, and has good sealing and heat insulation. It is an energy-saving and environmentally friendly door and window that is mainly promoted in China. Compared with traditional wooden and steel doors and windows, it has better heat insulation, anti-aging, sound insulation and good sealing.
