Greater bond strength, hardness, rigidity, toughness and impact resistance
Many adhesives cure just fine at room temperature. Other formulations do better with heat.
Epoxies and urethanes are the most common chemistries used in heat-cure applications. However, other adhesives, such as acrylics or methacrylates, can be negatively affected by higher temperatures during the cure process and are less likely to use heat.
Benefits of heat curing include greater bond strength, hardness, rigidity, toughness and impact resistance. Chemical resistance, thermal resistance and electrical insulation performance can also improve with heat. On the other hand, flexibility, elongation and crack resistance may be reduced as a result of heat exposure. Curing adhesives with heat can reduce cycle times and greatly increase throughput.”