Adhesives

High mechanical strength: Structural adhesives can achieve very high bond strengths, often exceeding those of mechanical fasteners

Material Bonding: Adhesives create strong and durable bonds between different materials, providing structural integrity and stability.

Uniform stress distribution: Adhesives can distribute stresses more evenly across bonded surfaces, reducing the risk of failure.

Aesthetics: Adhesives and sealants can be used to create clean, seamless joints, improving the appearance of products.

Lightweight: Adhesives can often be used to replace mechanical fasteners, resulting in lighter and more efficient products.

Effectiveness: Adhesives can often be applied more efficiently than mechanical fasteners, reducing labor costs and streamlining production processes, leading to increased productivity.

Corrosion protection: Adhesives can provide a protective barrier against corrosion, especially in applications exposed to harsh environments.

Impact resistance: Adhesives can create strong and durable bonds between materials, enhancing their ability to withstand external shocks and forces

Vibration damping: Some adhesives can absorb vibrations and reduce noise, improving product performance and comfort.

Adhesion Failure occurs at the interface between the adhesive and the substrate. It indicates that the bond between the adhesive and the substrate was weaker than its strength. We suggest improvements such as the surface preparation and adhesion properties.

Cohesive Failure occurs within the adhesive itself. It Indicates that the adhesive is weaker than the materials it's bonding and we suggest the adhesive couldn't withstand the applied stress.

Mixed Mode Failure combines both cohesive and adhesive failures, breaking partly within the adhesive and partly at the interface. And indicates a combination of factors affecting bond strength, such as surface preparation, adhesive properties, or application conditions.

Substrate Failure occurs in the inner of the substrate. It indicates that the bond between the adhesive and the substrate, the cohesion of the adhesive was stronger than the material strength.

UV-curable materials contain photoinitiators that are activated by UV light. When exposed to UV radiation, these photoinitiators undergo a chemical reaction that initiates the polymerization process, causing the adhesive to solidify.  UV-curing adhesives such as epoxy acrylate adhesives, polyurethane acrylate adhesives, and polyester acrylate adhesives are widely used.

It brings fast curing times, less energy consumption, environmental friendliness, and accurate and consistent results

Moisture-curing adhesives typically contain reactive groups, such as isocyanates or hydroxyl groups, that can react with water molecules. When exposed to moisture, these reactive groups undergo a chemical reaction, forming new bonds that solidify the adhesive.  It brings the disadvantages of ease of application, does not require special equipment or curing conditions, and is environmentally friendly. Common types of moisture-curing adhesives include Polyurethanes, Silicones, and Cyanoacrylates. 

Heat curing is a process where adhesives solidify when exposed to heat. This heat energy activates reactive groups within the material, causing them to undergo a chemical reaction that forms a polymer network. Most heating curing adhesives are supplied in a two-component system, usually made up of a resin and a hardener, there are also some adhesives are supplied in single-component systems or one-component systems. In this system, the heat-curing pastes must be cold-stored to delay the curing itself.  Epoxies are a class of the most common heat-curing adhesives, polyester resin, and phenolic resins.