Coated insulating glass is mostly used for glass curtain walls of buildings. As an architectural ornament, it brings a good looking, generous and bright image to the building, enhancing the beauty from the building. However, in true use, we often find that some buildings using coated insulating glass show photograph scattering. Make the beauty in the building disappear and even have got a negative impact. The author conducted a close study on this challenge, and conducted a a number of investigations and experiments to check on relevant data at dwelling and abroad, and compiled data for analysis.
First, the reasons for design and installment:
With the rise plus increase of high-rise properties, people's requirements for that aesthetic appearance of properties have increased, and the very use of glass panels is becoming larger and larger. The wind pressure load to the glass itself also grows. There are two different types of wind pressure loads about the glass: internal wind force and external wind force load. When the external wind pressure with the insulating glass is higher than the internal wind force, the glass surface will be curved inward, and the surface in the glass is concavely curved; and when the inner wind pressure is in excess of the external wind pressure, the surface of that glass is outwardly curved to be convex; only when inside and outside Should the compressive loads are equal or close, the magnifying glaas can form a plane. Therefore, in the layout and installation, the wind pressure load belonging to the glass should be absolutely considered. This wind load is not only the external wind pressure load for the glass itself, but also the combined the wind pressure weight inside and outside that hollow glass.
The change of insert inside and outside the actual insulating glass varies using the change of the ambient temperature and also the installation area. The difference in difficulty between the regions is rather large, especially in the plains and plateaus. If your products produced in the plain area utilized in the plateau place, the inside of your insulating glass is positively pressed along with the glass is drummed outward. On the contrary, it becomes a bad pressure and the tumbler is concave inward. Hence, when designing the insulating glass for being installed in different locations, the structure and specifications of the insulating glass product ought to be designed according to the different regions and the utmost wind pressure. The influence of the change of the ambient temperature around the load change of the insulating glass is mainly manifested by the change from the volume of the dry air sealed included in the hollow glass with the change in the temperature, thereby causing the actual internal load to alter, and the glass area is bent inward plus outward. After repeated experiments by HotTag, for 550mmx1100mm (5+9+5) mm rectangle-shaped coated insulating glass, the displacement of the biggest market of the single-sided glass surface area changes about 0. 03mm for every 1 °C change with ambient temperature. It sometimes appears that the change in temperature carries a considerable influence on the flatness on the insulating glass.
Insulating a glass has unique installation along with construction conditions. During the construction on the glass curtain wall, when it comes to construction within the setting up and construction specifications, when the glass is sealed, the thickness of the peripheral sealant is unvarying, and the metal style plus itself has deflection or even joint connection, so the glass cannot be while in the same plane or but the whole In the identical plane, there is a local variation, which may also cause image scattering.
As we many know, most of the actual insulating glass produced throughout China is vertical laminated and also horizontally sealed. During the particular splicing process, the glass itself isn't affected by the force and will not deform. However, when this glue is sealed, the upper glass is bent by a gravity, and the lessen glass is bent " up ", and the air in which presses the inner breathing space overflows outward. Although its only a trace sum, after the sealant, a slight negative pressure is generated inside insulating glass. The not one but two pieces of glass will certainly bend inward. Especially when the two pieces of cup are thin, the product specifications are definitely obvious. When the ambient temperature is lowered and the external air pressure is increased, the curvature belonging to the glass is also increased until both pieces of glass are generally bonded together, and the energy saving effect in the insulating glass is dropped.
Third, the inevitable trigger
In order to ensure the airtightness with the window during installation, its generally necessary to seal the glass and also the metal frame with a new sealant. However, as the actual temperature changes, the coefficient of enlargement between the glass as well as the frame is different. Tensile or compressive stress is generated throughout the glass. Although there is usually a sealant as a load, this stress cannot possibly be completely eliminated. If the ambient temperature changes, the stress can be increased. As a result in the stress, the deformation on the edge of the goblet is increased, and sometimes the glass is damaged. This situation is normally found on monolithic goblet.
In the actual generation process, the selection in the original glass piece is known for a great influence on the bending resistance with the glass. Generally, in tempered glass, heat-strengthened glass and common glass, from the factor of wind pressure weight, tempered glass is the largest, and heat enhancement will be second. These two spectacles are better to stand up to external stress than standard glass. Therefore, we recommend to work with tempered coating or heat-enhanced coated glass for the reason that original film when providing coated insulating glass; the product variety must use inflatable glass regularly, and it is suitable to lessen the specification of goblet and reduce the glass deformation brought on by various reasons.