Sealing strips in plastic-steel doors and windows, thermally-insulated aluminum doors and windows, and wooden doors and windows play an important role in waterproofing, sealing, and energy conservation, as well as providing sound insulation, dustproofing, frost protection, and warmth retention. They must possess strong tensile strength, good elasticity, and relatively good temperature and aging resistance. To ensure proper adhesion between the strip and the profile, the cross-sectional dimensions of the strip must match the profile of the plastic-steel door and window. Sealing strips are generally used on casement windows, hung windows, and folding windows. Their primary functions include dust and insect protection, waterproofing, sound insulation, and sealing.
Blank strips are typically installed on sliding window (door) sashes, around the frame and sash, or on the sealing bridge (draft block) to enhance the seal between the frame and sash. The size of the rubber strip is a key factor affecting the watertightness of sliding doors and windows, as well as the opening and closing force of doors and windows. Oversized rubber strips or excessively high bristles not only make assembly difficult but also increase the resistance to movement, particularly the initial resistance during opening and the final seating resistance during closing. If the specifications are too small or the vertical strips are not high enough, they can easily fall out of the groove, significantly reducing the sealing performance of doors and windows.
Strips come in two types: siliconized and non-siliconized. Siliconized strips perform better in use. Qualified strips have a flat surface, a smooth base and vertical strips, no bends, and no pitting on the base, meeting the 0.2mm standard.
