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Application method of silicone structural adhesive

2021-09-07  From: Shandong Lechao New Material Technology Co., LTD Browsing times:35

For the usage of silicone structural adhesive, the following small series will introduce the usage of silicone structural adhesive in detail, hoping to help you.

One component silicone structural adhesive can be directly applied between aluminum and glass for bonding. It is hydrolyzed by absorbing moisture in the air, and the condensation reaction solidifies from the outside to the inside. It is required that the gluing room should be clean, the temperature should not be lower than 23 ℃, and the relative humidity should not be lower than 40%. Otherwise, it will affect the curing and reduce the strength of the adhesive layer.

One component silicone structural adhesive is divided into acid and neutral. When the acid adhesive is cured, acetic acid is released to corrode the film of coated glass produced by vacuum magnetic sputtering method for hidden frame curtain wall, so neutral silicone structural adhesive should be used.

Before using the two-component silicone structural adhesive, it is necessary to add a catalyst to the base adhesive, fill and mix the coating between aluminum and glass in the bonding machine for bonding and curing. Two component glue is neutral glue.

Silicone structural adhesive has a unique characteristic. There is a compatibility problem between glue and adhesive aluminum, glass and foam strip. Compatibility test is not needed.

If the compatibility test results show that the structural adhesive is incompatible with one of the three materials, even in the bonding process, different strength indexes meet the requirements at that time. After half a year or a little longer, the silicone structural adhesive will begin to change color and deteriorate into a liquid state, thus losing its bonding ability, and the glass will fall down, causing serious consequences. Therefore, in order to ensure the bonding ability of silicone structural adhesive for a long time, compatibility test needs to be done.

Keywords: silicone structural adhesive