Publish Time: 2022-04-16 Origin: Site
The unitized curtain wall can be mainly divided into unitized curtain wall and semi-unitized curtain wall, also known as rigid unitized curtain wall.
How does the unitized curtain wall solve the problem of water leakage?
What are the installation requirements for unitized curtain wall?
What is the function of the rational design of the rubber strip of the unitized curtain wall?
The unitized curtain wall solves the problem of water leakage and adopts the "isobaric principle". There must be three conditions for the curtain wall to leak. Second, the water movement path; third, the power of water movement, there are six kinds of power such as gravity, momentum, surface expansion force, capillary phenomenon, airflow and pressure difference. The pressure difference is the main reason for the leakage of most of the curtain wall joints. The water outside the curtain wall, whether it is rainwater or window washing water entering the room, must not only have cracks or cracks, but also the outdoor pressure must be higher than the indoor pressure. If the indoor pressure is equal to the outdoor pressure, or even greater than the outdoor pressure, even if there are cracks, the water will not enter the wall. Generally, the traditional waterproof method is to try to reduce the possible openings at the long seams, such as sealing and blocking the contact seams with various sealants and adhesive strips. The new way of waterproofing the room is to divert the rainwater into the isobaric cavity, and then divert the water out of the wall.
(1) The section design of the unitized curtain wall should consider reducing the number of parts as much as possible, reducing the processing volume and processing difficulty of the components, so as to ensure the assembly quality of the panels.
(2) The types of profiles of the unitized curtain wall panels should be considered as few as possible, and at the same time, the combination of parts should be reduced as much as possible, so as to reduce the gap formed by the panel assembly.
(3) The airtight line of the unit curtain wall should be closed. The structure must prevent the existence of air leakage channels at the cross joint.
In the system design of the unitized curtain wall, the design of the rubber strip is also a very important part. It determines the water tightness, air tightness and durability of the waterproof performance of the unitized curtain wall. There are some problems with the adhesive strips currently used in engineering. The reason is the lack of understanding of the product performance of the rubber strip, and the unreasonable phenomenon of the section design of the rubber strip. In fact, the material, elongation, compression and section form of the rubber strip are all critical. The unit curtain wall sealing strip is mainly EPDM strip, which has excellent ozone aging resistance, weather aging resistance, heat aging resistance, water resistance, and good chemical resistance. It has medicinal properties and can be used for a long time in the natural environment of sunshine, humidity and cold. There are many grades of EPDM rubber, and different grades have different characteristics. Therefore, it can be said that the chemical composition and formula of EPDM rubber determine the use environment and working performance of the rubber strip.
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