Analysis of the influence of the thickness of the hot melt adhesive layer on the bond strength

2021/03/18

     When the thickness of the adhesive layer has a certain relationship with the adhesive force, the greater the adhesive force of the hot melt adhesive, the greater the adhesive force, while the adhesive layer is too thin or even has only one adhesive surface, the greater the adhesive force , And when the adhesive layer is too thin or even has only one adhesive surface, the adhesive force will be smaller.

     If the adhesive layer is too thick, the probability of defects in the adhesive layer will increase. When external forces are applied, stress concentration will easily occur around these defects, and the hot melt adhesive layer will break. The proper thickness of the hot melt adhesive can make the two surfaces of the adherend fully wet, so that the adhesive layer can form a complete adhesive layer between the two adherends.