In modern buildings, housing societies, and offices, the use of double-glazed glass or IGU (Insulated Glass Unit) has now increased tremendously in place of single glass. The biggest benefit of double glass is that it prevents outside noise from entering inside and does not allow the cooling of an air conditioner or the heat of a heater to be wasted outside the room. However, do you know how a perfect double glass unit is prepared in a factory by combining two ordinary glasses? This is no ordinary fitting; rather, it is a complete technical process. Let's learn what the actual stages of making glass into double glass are.
What is the Structure of a Double Glass Unit (IGU)?
Before understanding the method of making double glass, it is essential to understand its structure. In this unit, there are two glasses between which an empty space is left. To keep these two glasses at a distance from each other, an aluminum strip is installed around all four sides, which is called a spacer bar. Inside this empty space, instead of ordinary air, argon gas is often filled, which does the actual work of blocking heat and sound.
6 Technical Stages of Making Double Glass
Measuring with Measuring Tape and Glass Cutting
First of all, a perfect measurement is taken with a measuring tape according to the size of the window or frame. After that, two separate panels of glass are cut with the help of a cutter pen or an automatic CNC cutting machine. Remember, mostly 5mm or 6mm glass is used for double glass.
Washing and Cleaning
After cutting, the glasses are passed through a special glass washing machine where dust, cutter oil, and fingerprints present on the glass are completely cleaned using RO water and high-speed brushes. If even a single particle remains inside the glass, it can never be cleaned after becoming double.
Preparation of Spacer Bar and Filling Desiccant
Now, according to the size between the two glasses, the aluminum spacer bar is cut to make a square frame. Inside this aluminum spacer bar, small granules of a special chemical are filled, which is called a desiccant. Its job is to absorb the moisture present inside the glass so that fog or vapor does not form inside the glass during winters.
Primary Sealing
A special glue called butyl is applied to both sides of the aluminum spacer frame. This works as the primary sealer. This frame is then pasted on top of the first glass by taking a perfectly straight level, and then the second glass is placed on top of it.
Gas Filling and Pressing
Now, this prepared unit is sent inside a hydraulic pressing machine. This machine joins both glasses together with uniform pressure. At this same stage, the machine extracts the ordinary air present between the glasses and fills argon gas there, which increases soundproofing up to 80%.
Final Sealing
After being pressed, a heavy-duty chemical called silicone or polysulfide is filled to completely lock all four outer edges of the double glass. This permanently seals the glass against outside air and water. After drying for a few hours, your perfect double glass unit becomes ready to be installed in a window.
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