Set door seal purposes:
① keep the car to avoid the wind and rain, dust, heat and sound insulation;
② When the body is subjected to vibration and distortion, the sealing strip also cushion, shock absorption, keeping the role of glass;
③ on the edge of the transfer windows for decoration;
Seal material, early often use natural rubber, and later developed as ethylene, propylene rubber, nitrile rubber and other synthetic rubber for the mainstream, but also the use of PVC resin. For fixed window frame part of the front, rear, triangular windows, etc., there is also a variety of adhesive forms (such as direct bonding method or a rubber band bonding method).