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The significance of surface treatment to the bonding strength of hot melt adhesives: The quality of surface treatment is often the key to determining the success or failure of a good adhesive joint. This is because the wettability of the adhesive to the surface of the adherend and the intermolecular forces at the interface (i.e., the adhesive force) are the main reasons for achieving high bonding strength. During the production, transportation, storage and use of parts, their surfaces will be contaminated to varying degrees, which directly affects the penetration of glue on them and the bonding strength. The importance of surface treatment also includes the following points.
① Before bonding, when preparing the surface of building components with hot melt adhesives, there are often oil stains, release agents, weathering layers, carbonization layers, rust layers, etc. These unclean and fragile surface layers should not be removed. It will greatly affect the bonding performance.
② Roughening the surface of the adherend can increase the actual bonding area of the adherend. For instance, sandblasting can increase the bonding area of polished metal surfaces by 20 times. In addition, a rough surface can enable the cured adhesive to form more interlocking structures with the adherend, that is, to generate mechanical adhesive force and enhance the bonding strength. This has been confirmed by both theory and practical experience.
Implementing safety protocols and following best practices for workplace safety is crucial for the success of businesses, the safety of workers, and continuing to promote safer working conditions in order to prevent workplace injuries. Hot melt adhesive also poses other hazards to the workplace and requires special care to handle safely. The Development of Safety […]
In the book printing and binding industry, hot melt adhesive is the core auxiliary material that determines the quality, environmental protection level, and compliance of books. Many printing and binding factories encounter these problems: new books that have been left out of the factory for a long time turn yellow and peel off, pages crack, […]
The desk calendar is a hard demand for graphic and text fast printing stores during the peak season every year. The binding methods are divided into circle binding, glue binding, and loose leaf binding, with significant differences in corresponding glue particles. We conducted a horizontal evaluation of three mainstream adhesive particles, Sunlife Hot Melt Adhesive, […]
Maintaining consistency is crucial for binding applications. – Managing processes and materials can lead to the best results. In terms of binding materials, manufacturers are seeking solutions that feature high durability, temperature and moisture resistance, as well as strong adhesion to various substrates. The formula of the binding hot melt adhesive product portfolio exceeds the […]
