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Why don’t standard aluminum spacer bars bond well to the sealant?

While insulating glass is being manufacturing, there will occasionally be a phenomenon of aluminum spacer and sealant non-bonding, so what is the reason for this situation?

A: The application is not standardized, such as the adhesion test is not done before application, the substrate is not cleaned as required, and the cleaned glass is not immediately closed.
Solution: Ensure that the substrate is cleaned and the construction is carried out as required.

B: Substrate material problems, such as different batches of substrate differences; The edge of the off-line low-radiation coated glass has not removed the film; The surface of the aluminum spacer has not removed oil stains, and there is an oxide layer.
Solution: Different batches of the substrate should be adhesion test, off-line low-radiation coating glass bonding surface part to remove film treatment, aluminum spacer to remove oil stains, and oxide layer.

C: The ambient temperature is low, resulting in slow initial bonding speed, or short curing time, and non-bonding performance during the cutting test.
Solution: improve the use and maintenance of the ambient temperature.

D: There is a problem with hot melt sealant, which affects the adhesion of the secondary insulating glass sealant.
Solution: Use insulating glass butyl sealant with guaranteed quality.

E: There is uneven mixing in the process of gluing.
Solution: Test to confirm that A and B components are evenly mixed before gluing.

F: The amount of B component added is too much or too little beyond the allowable proportion range.
Solution: Test the breaking time before gluing to confirm that the proportion of A and B components is within the allowable proportion range.

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