[China Aluminum Network] The corner strength and sealing of aluminum alloy doors and windows can only use special aluminum alloy door and window group corner glue, but unfortunately most of the windows and doors factories and developers, administrative departments and related architectural design, supervision, etc. The unit did not really recognize the important role of the dedicated group of adhesives in improving the overall quality of doors and windows. Some door and window assembly plants did not use the corner glue or mistakenly used glass glue, structural adhesives, epoxy adhesives, etc. as aluminum alloy door and window adhesives.
Aluminum alloy doors and windows of the corner strength and sealing as long as the use of special aluminum alloy door and window group corner glue can be, but unfortunately most of the windows and doors factory and developers, administrative departments and related building design, supervision and other units did not really realize the special The important role of group glue in improving the overall quality of doors and windows. Some door and window assembly plants did not use the corner glue or mistakenly used glass glue, structural adhesives, epoxy adhesives, etc. as aluminum alloy door and window adhesives.
At present, there are three types of plastics that are often posing as corner glues on the market:
1, glass glue, also known as silicone sealant; poor adhesion of aluminum alloys, poor weatherability, easy aging, low hardness, too much elasticity, the colloid does not expand when curing, can not make the corners and the cavity closely Connected to one.
2. The structural adhesive has poor adhesion to the aluminum alloy, and has a long curing time. The product has many odors and does not swell when cured, and does not produce high strength.
3. Epoxy adhesive has no elasticity after being cured, it cannot adapt to the form of microseism, easy to be crisped and broken, and the long-term strength is not enough after the corners of the assembly, and cracking and dregsing will occur.
Why do we advocate the need to use a special group of glue? Because special aluminum alloy door and window group rubber has the following characteristics:
1. The colloid is a modified polyurethane-based adhesive that does not contain solvents and meets environmental protection requirements.
2, the initial curing time is short, about 10 minutes, help to improve production efficiency. Divided into single and two-component type, it is more suitable for the requirements of the two processes of “corner-coded plastic plugging and corner integral injectionâ€.
3, the hardness after curing is very high, but not brittle, with low elasticity and excellent waterproof performance, so that the corner and the profile of the cavity wall adhesion for the tough connection, so as to make up for, reduce the window corner of the various deformation, cracking conditions Effectively solve the leakage problem at the corners of doors and windows.
4. After the single-component adhesive corner glue is completely cured, the shear strength of the effective adhesive part of the corner and profile cavity can reach 10.3N/mm2, and the adhesive strength of the two-component adhesive group can reach 18N/mm2. Greatly improve the window angle strength. That is to say, the shear angle strength of ordinary 60 series profiles in China can exceed.
5. The colloid slightly foams and expands during the curing process to form an elastic pad between the metal and the metal, which effectively weakens the transmission of various forces and functions as a shock absorber and a cushion.
6, strong weather resistance, ability to -40 °C +80 °C temperature changes, colloidal white or translucent, the colloid will not turn yellow in the short term. The two-component adhesive can withstand 30 minutes at 230°C and is suitable for post-processing applications such as powder coating.
7, with the special cleaning agent, a small amount of plastic spill is easy to clean, will not damage the surface of the coating and paint surface, non-toxic environmental protection.
The author believes that a large number of Germany's "Wei Shi" series of adhesives and related accessory products currently used in the market are designed for aluminum alloy door and window corner structure reinforcement and sealing, and are suitable for various assembly angle requirements. They are aluminum alloys. The smarter choice of window and door factories and developers.
We call on developers, administrative departments, architectural design, supervision, and other companies as well as a large number of people of insight in the company's doors and windows to take responsibility for consumers and the windows and doors industry. We value product quality and promote the use of aluminum alloy doors and windows. Door and window to enhance insulation, air tightness, watertightness, sound insulation of the special group of Jiaojiao.
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