Bonding is any process in which two or more substrates are joined with the use of an adhesive. A substrate is surface of an object. An adhesive is any non-metallic binder that that acts via adhesion and cohesion. Most of the consumer technology that define the modern world are made using adhesives.
The use of adhesives to replace traditional fasteners like screws, bolts, and rivets has sped up manufacturing operations and pushed the creative boundary of the products. Thinner and lighter devices like smartphones and laptops are possible due to adhesives. Production speed for cars and motorcycles is improved by eliminating the preparatory processes required by traditional fasteners.
Although adhesives and bonding processes have now become an indispensable part of the industrial world, this was not always the case. Early adhesives did not have the strength and other properties needed for industrial applications. It was not until the introduction of modern bonding products like the polyurethane adhesives that manufacturers explored and embraced the bonding process.
Adhesives have a long history. Archaeologists and historians speculate that adhesives and the bonding process have been around for thousands of years. Our ancestors used anything plant saps and animal products for gluing things together. Even today, some people still use natural adhesives for certain bonding applications.
As previously mentioned, adhesives work via adhesion and cohesion. In the future, we will discuss how these two processes work.