Definition: Adhesion refers to the physical or chemical attraction between two surfaces that allows one object to hold onto another without being pushed by the force. Adhesive materials are those whose molecules pull together tightly, usually because they interact with each other through attractive forces. The strength and nature of these interactions depend on the molecular structure of the adhesive material and its surface properties. For example, rubber bands or glue sticks stick firmly to surfaces due to their high tensile strength. Similarly, paint adheres to a surface by binding together the molecules that make up the paint, preventing it from spreading when rubbed off. Other examples include Velcro, which holds objects in place by pulling together the threads of the adhesive material. Adhesive materials can be classified into two main categories: static and non-static. Static adhesives are those where the force between the two surfaces is constant and does not vary with their relative positions or movements. Non-static adhesives, on the other hand, have different forces that vary according to the movement of the adhesive material. Adhesive materials come in various shapes and sizes, which determine how they hold onto each other. The size and shape of the adhesive particles determine the strength and durability of the adhesive bonds. Adhesion can be achieved by applying a pressure or a force on the surfaces, such as using friction sticks, rubber bands, or adhesive tape. Adhesive materials are used in a variety of applications, including manufacturing, construction, medicine, engineering, and technology. They facilitate various processes and structures, allowing objects to be fixed together without being dragged or pushed by each other.

adhesions