Quality control method crucial properties

As mentioned in the introduction, adhesives are process materials. This is similar to a welding process. For these processes, it is very difficult to control the quality of a bonded joint in a nondestructive way. Therefore, it is crucial to control the process parameters of each production step, to check the properties of the adhesive with the real substrates and it is necessary to control the surface conditions of the substrates itself. And even with nondestructive testing methods it is not possible to check the quality and durability of the adhesion itself This can only be done with thorough adhesion tests upfront with original substrates and original process conditions. 

---