Author: Site Editor Publish Time: 2024-11-21 Origin: Site
The joint interface should be designed to be bonded on two sides to ensure that the sealant can move with the joint after sealing; at the same time, three-sided bonding should be avoided, because three-sided bonding causes uneven force on the sealant and is easy to tear.
Because the thermal expansion coefficients of different substrates are different, some substrates with large thermal expansion coefficients have large interface displacement in an environment with a large temperature difference between day and night; in addition, some interfaces are in a vibrating environment, resulting in large interface displacement. Under these conditions, if a sealant with a low elongation is selected, it is easy to cause the sealant to crack.
Before gluing, if there are contaminants in the joint, it will affect the adhesion of the colloid, leading to cracking or debonding. Therefore, before gluing, be sure to ensure that the joint is fully cleaned and reserve appropriate maintenance time after gluing.
