1. Shear Strength

Bonding strength refers to the stress required to cause failure at the interface between the adhesive and the bonded material or in the adjacent area of the adhesive part under external forces. It is one of the key indicators for evaluating the quality of adhesives. Its magnitude depends not only on adhesive force, the mechanical properties of the adhesive, the properties of the bonded material, and the bonding process, but also on factors such as joint type, stress conditions (type, magnitude, direction, frequency), environmental factors (temperature, humidity, pressure, medium), testing conditions, and experimental techniques.

2. Tensile Strength

Bonding strength denotes the stress needed to induce failure at the interface between the adhesive and the bonded material or in its adjacent region of the adhesive joint under external loading. As a critical metric for assessing adhesive quality, its value is influenced by not only adhesive force, the mechanical characteristics of the adhesive, the properties of the adherend, and the bonding process but also by variables such as joint configuration, stress parameters (type, magnitude, direction, frequency), environmental conditions (temperature, humidity, pressure, medium), testing protocols, and experimental methodologies.

3. Peel Strength

Bonding strength signifies the stress required to cause failure at the interface between the adhesive and the bonded material or in the vicinity of the adhesive joint under external forces. It serves as an important criterion for evaluating adhesive quality. Its magnitude is determined not only by adhesive force, the mechanical performance of the adhesive, the attributes of the bonded substrate, and the bonding technique but also by factors including joint geometry, stress conditions (type, magnitude, direction, frequency), environmental factors (temperature, humidity, pressure, medium), testing conditions, and experimental techniques.