What is the function of the sealing strip for insulated glass
Information summary：The core function of the sealing strip of insulating glass is to achieve sealing, buffering, and structural auxiliary fixation between glass and spacer strips, glass and frame. It is a key component to ensure the airtightness and water tightness of insulating glass, and to improve overall stability and durability.
The core function of the sealing strip of insulating glass is to achieve sealing, buffering, and structural auxiliary fixation between glass and spacer strips, glass and frame. It is a key component to ensure the airtightness and water tightness of insulating glass, and to improve overall stability and durability.
1、 Core sealing function: block the penetration of external media
Sealing is the primary function of sealing strips, which directly determines whether the core properties such as insulation and sound insulation of insulating glass can be maintained for a long time.
1. Ensure airtightness and maintain insulation and sound insulation effects
Tightly fill the gaps between the glass and the spacer, as well as between the glass and the door and window frames, to prevent the circulation of outside air and dry air/inert gas inside the hollow layer.
If the airtightness fails, gas leakage inside the hollow layer will lead to a decrease in insulation performance (K value), weakened sound insulation effect, and loss of the energy-saving significance of the hollow glass.
2. Strengthen water tightness to prevent moisture infiltration
To prevent rainwater, dew, and other moisture from seeping into the interior of the insulated glass through gaps, and to prevent moisture from coming into contact with the desiccant inside the spacer strip, in order to prevent the glass from fogging or condensing after the desiccant becomes saturated with water.
At the same time, it prevents moisture from corroding the spacer strips, sealant and other components, avoids rusting of metal spacer strips, aging and failure of sealant, and extends the service life of insulated glass.
2、 Structural auxiliary function: buffering protection and stable fixation
Sealing strips can not only seal, but also provide structural support and protection during the assembly and use of insulating glass.
1. Buffer and shock absorption to protect the edges of the glass
The material has a certain degree of elasticity, which can buffer the collision pressure between the glass and the spacer during the production and assembly of insulating glass, avoiding cracks at the edge of the glass due to hard contact.
In daily use (such as glass thermal expansion and contraction caused by temperature changes, door and window opening and closing vibrations), it can absorb impact forces and reduce the risk of glass breakage due to stress concentration.
2. Auxiliary fixation to enhance overall stability
Fill the gap between the glass and the frame, ensuring a tight fit between the glass and the door and window frames, preventing the glass from shaking or shifting within the frame, and ensuring smooth opening and closing of doors and windows.
Cooperating with sealant, it enhances the overall structural stability of insulated glass, especially when resisting external forces such as wind pressure and earthquakes, it can disperse stress and improve deformation resistance.
3、 Adaptation and Compatibility Function: Compensating for Errors and Adapting to Scenarios
The elasticity and plasticity of the sealing strip enable it to adapt to different installation scenarios and compensate for dimensional errors in production and construction.
1. Compensate for size errors and adapt to different specifications
It has a certain degree of elasticity and can adapt to small dimensional deviations in glass, spacer bars, and frames during production and processing, ensuring that even with slight errors, it can still achieve tight sealing.
According to the thickness and frame specifications of the insulated glass, the corresponding cross-sectional size of the adhesive strip can be selected, which has strong compatibility and meets the installation needs of different scenarios.
2. Adapt to environmental changes and maintain sealing performance
Excellent sealing strips (such as EPDM strips) have good weather resistance and can maintain elasticity in harsh environments such as high temperature, low temperature, and ultraviolet radiation, without aging, hardening, or shrinkage.
To avoid the failure of the rubber strip due to environmental changes and ensure the stable sealing effect of the insulated glass during long-term use.
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