Fang Jin, broken bridge aluminum doors and windows and plastic steel doors and windows are two common doors and windows in the market. From the perspective of wind pressure resistance and watertight function, plastic steel doors and windows are reinforced by lined steel due to their low material strength and steel property, but its function of resisting wind pressure and watertightness is about two grades lower than that of aluminum alloy doors and windows. Moreover, because the lined steel of plastic steel doors and windows is not connected into a intact frame system in the corner of the inner cavity of the profile, the strength of plastic welding angle of window frame, fan Four Corners and T-shaped joints is relatively low.
From the perspective of air tightness function, since the frame and fan components of plastic steel doors and windows are welded, their air tightness should be slightly better than that of aluminum alloy doors and windows connected by screws, but the dimensional accuracy of aluminum alloy door and window profile is relatively high, and the frame, fan cooperation is more careful, so the two are still at the same level.
From insulation, the thermal insulation of plastic steel doors and windows is better than that of aluminum alloy doors and windows, but aluminium windows of frame fans occupy 10% less than plastic steel doors and windows, moreover, the aluminum door and window frame section is not solid, and the wall thickness of insulated aluminum profile is 40% smaller than that of the plastic section. Among them, the thermal insulation of aluminum alloy broken bridge doors and windows is better than that of plastic steel doors and windows.
From the perspective of lighting function, the lighting function of plastic steel doors and windows is worse than that of aluminum alloy doors and windows. The shading area of frame fan components is 10% larger than that of aluminum alloy doors and windows, and the visual field and binding effect are poor, which is not conducive to energy saving and consumption reduction of building lighting.
From the perspective of sound insulation function, the key point of the sound insulation function of the window is the sound insulation effect of the glass controlled by 80% of the window area. The crack sealing level of aluminum alloy doors and windows and plastic steel doors and windows is the foundation, and its sound insulation function is also the foundation. However, the sound insulation of aluminum alloy broken bridge doors and windows is better than that of plastic steel doors and windows.
From fire resistance, the fire resistance of plastic steel doors and windows is better than that of combustible wooden doors and windows, but it is worse than that of aluminum alloy doors and windows. So PVC resin is the key material of plastic steel doors and windows, which has flame resistance, but aluminum alloy doors and windows have right or wrong flame resistance.
From the perspective of attire, plastic doors and windows are mainly white, and the attire is good. Aluminum alloy doors and windows have a variety of surface processing techniques such as powder spraying, anodic oxidation, electrophoretic coating, wood grain transfer printing, etc. The surface color selection and retreat are large, with white, green and other colors and wood grain, granite and other surface colors.
From the perspective of aging, deformation and other issues, aluminum alloy doors and windows are durable, while plastic steel doors and windows turn yellow after mapping at the end of 1500 hours. Plastic steel doors and windows are easy to deform when heated, become brittle when cold, and the stability of size and form shift is poor. It is often necessary to use the rigidity of glass to prevent window frame deformation.
