I. Bonding Assemblies

The entire processing of bonding assemblies more or less influences the selection of adhesives. The surface created on the bonded substrate by pre-bonding processing is directly related to the bonding effect. If this surface cannot be altered, adhesives must be selected to match it. After bonding, the processing methods for the entire bonded component (cutting, stamping, heating, freezing, impregnation, etc.) must also be considered when choosing adhesives. If the bonded component is a unit in a production line, the operational properties of the adhesive must be adapted to the production line speed to synchronize with other units. Additionally, the form of the adhesive (liquid, paste, film, or solid) must match the processing method of the bonded component (manual or mechanical).

II. Properties of Bonded Materials

The physical and chemical properties of the bonded materials, as well as the degree of surface preparation required before bonding, are another critical factor in selecting adhesives. The goal here is to maximize the bonding degree at the joint, ensuring that when tested, the failure occurs within the adhesive's cohesive structure rather than at the adhesive/substrate interface. Only in this way can the adhesive's maximum strength be achieved.

III. Strength of Bonded Materials

Low-strength materials, such as fabrics, felts, or certain wood-like materials, may be weaker than the adhesive itself, so joint failure tends to occur within the material. For such applications, the selected adhesive should allow the bonded component to be used under any physical conditions that the material can withstand, without the risk of bond failure. Using high-strength adhesives in this case would unnecessarily exceed the material's specifications or incur higher costs.