塑钢门窗与断桥铝门窗它们的特点几乎一致的：、美观、阻燃、导热系数差、易清洁。但因为断桥铝门窗有独特的特点使得塑钢门窗逐渐被替代。断桥铝门窗与塑钢门窗的特点对比：

The characteristics of plastic steel doors and windows and bridge cut aluminum doors and windows are almost the same: energy-saving, beautiful, flame-retardant, poor thermal conductivity, and easy to clean. But due to the unique characteristics of broken bridge aluminum doors and windows, plastic steel doors and windows are gradually being replaced. Comparison of Characteristics between Broken Bridge Aluminum Doors and Windows and Plastic Steel Doors and Windows:

1、气密性能。塑钢窗的PVC型材是通过焊接连接的，在连接处没有缝隙;而断桥铝合金窗是通过螺栓连接的，因此塑钢窗的气密性要优于断桥铝合金窗。

1. Air tightness performance. The PVC profiles of plastic steel windows are connected by welding, with no gaps at the joints; And the broken bridge aluminum alloy window is connected by bolts, so the air tightness of the plastic steel window is better than that of the broken bridge aluminum alloy window.

2、隔声性能。由于铝合金的金属特性，其能量传播性能远高于塑钢窗，其中就包括声能和热能，因此塑钢窗的隔声性要明显优于铝合金窗。

2. Sound insulation performance. Due to the metallic properties of aluminum alloy, its energy propagation performance is much higher than that of plastic steel windows, including sound and heat energy. Therefore, the sound insulation of plastic steel windows is significantly better than that of aluminum alloy windows.

3、抗风压强度。虽然塑钢窗内有钢衬支撑，但钢衬与钢衬之间没连接，因此在强度上没有断桥铝合金高，抗风压强度相对断桥铝合金较低。

3. Wind resistance strength. Although there is steel lining support inside the plastic steel window, there is no connection between the steel linings, so the strength is not as high as that of the broken bridge aluminum alloy, and the wind pressure resistance strength is relatively lower than that of the broken bridge aluminum alloy.

4、保温性能。PVC型材是目前用于门窗的型材中保温性能好的，其传热系数是钢材的1/357，是铝型材的1/1250，铝型材和PVC型材整窗的传热系数之比是1.44倍，即冬季、夏季的能量损失是塑钢窗的1.44倍。

4. Thermal insulation performance. PVC profiles are currently the profiles used for doors and windows with good insulation performance. Their heat transfer coefficient is 1/357 of steel and 1/1250 of aluminum profiles. The ratio of heat transfer coefficient between aluminum profiles and PVC profiles for the entire window is 1.44 times, which means that the energy loss in winter and summer is 1.44 times that of plastic steel windows.

5、采光性能。由于塑钢窗的在外立面的投影尺寸比断桥铝合金窗大一些，其框扇构件遮光面积比断桥铝合金窗大10%左右，因此同样的洞口尺寸，塑钢窗的采光性能比断桥铝合金窗差10%左右。

5. Lighting performance. Due to the larger projection size of plastic steel windows on the exterior facade compared to broken bridge aluminum alloy windows, the shading area of their frame and fan components is about 10% larger than that of broken bridge aluminum alloy windows. Therefore, with the same opening size, the lighting performance of plastic steel windows is about 10% worse than that of broken bridge aluminum alloy windows.

6、水密性。由于塑钢窗的开启扇（内平开）与框不是同一平面，向室内凹陷，因此容易积水（不会进入室内），需要通过排水槽排水，冬季不会结露。而断桥铝合金的开启扇与框在同一平面，不易积水，但由于其金属特性，在冬季可能出现结露现象。

6. Water tightness. Due to the fact that the opening fan (inner side opening) of the plastic steel window is not on the same plane as the frame, it is prone to water accumulation (not entering the room) and needs to be drained through a drainage channel to prevent condensation in winter. The opening fan and frame of the broken bridge aluminum alloy are on the same plane, which is not easy to accumulate water. However, due to its metallic properties, condensation may occur in winter.