How to select the sealing strips for casement doors and windows.
Sealing strips are one of the most important accessories for aluminum doors and windows. They are mainly used in parts such as window frames and sashes, and frame - glass joints, playing roles in sealing, waterproofing, sound insulation, shock absorption, and heat preservation. aluminum alloy doors and windows are required to have good tensile strength, elasticity, temperature resistance, and anti - aging properties.
The sealing strips of aluminum windows, in combination with the profiles, achieve the required sealing performance, which is affected by the main material, installation method, compression working range, compression force, and the cross - sectional shape of the strips.
The sealing strips of aluminum alloy doors and windows can be divided into single - material strips and composite - material strips according to the material.
Single - material strips mainly include ethylene - propylene - diene monomer (EPDM) sealing strips, silicone rubber (MVQ) sealing strips, thermoplastic vulcanizate (TPV) strips, and plasticized polyvinyl chloride (PVC) strips.
The composite - material sealing strips of aluminum alloy doors and windows mainly include wire - inserted strips, surface - sprayed strips, hard - and - soft - composite strips, sponge - composite strips, water - swelling strips, and coated strips.
The basic physical properties (tensile strength, elongation at break, compression set) of EPDM sealing strips are superior. They have outstanding weather resistance, high - and - low - temperature resistance, and corrosion resistance, with excellent comprehensive performance. Currently, they are widely used in the door and window field.
Recommended applicable temperature ranges for common sealing strips: - 60 °C to 150 °C for EPDM material, - 60 °C to 300 °C for MVQ material, - 40 °C to 150 °C for TPV material, and - 25 °C to 70 °C for PVC material.
Sealing strips can be divided into press - in type, through - in type, and adhesive type according to the installation method, and can be divided into sealing strips between frame and sash, sealing strips between frame and glass, intermediate sealing strips, etc. according to the installation parts of doors and windows.
Is it better to use sealing strips or apply sealant for the frame - glass joints? In terms of the controllability of construction quality and on - site construction safety, it is recommended to use sealing strips instead of applying sealant on - site.
Many European door and window system nodes do not have outdoor - side frame - sash sealing strips, which is for the need of equal - pressure drainage, not to cut corners.
