What are the reasons for the poor adhesion of repair strips during cold bonding during the repair process of conveyor belts?
There are two main situations that cause poor adhesion of repair strips: bubbling and poor adhesion
Bubble:
1. The surface of the conveyor belt is unevenly polished, and there is air left in the bonding surface.
2. The thickness of the adhesive coating is uneven. The thin layer of adhesive dries first, while the thick areas have not completely evaporated the solvent, resulting in a lack of initial adhesive strength and causing virtual adhesion.
3. Uneven compaction during air discharge after bonding. (Compact or hammer densely from the middle to the surrounding area with a compaction roller.)
Poor adhesion
1. After applying the glue, the glue was not fully air dried until it did not stick to the hands, resulting in insufficient evaporation of the solvent inside the glue.
2. Incorrect glue application, insufficient glue application at the edge seams.
3. During bonding, due to hand or other factors, the adhesive surface is contaminated and loses its activity, resulting in insufficient bonding strength.
4. Insufficient static curing time.
5. The conveyor belt repair strip should be applied to the surface with the CN layer (only one color of surface) if it is painted incorrectly during application