Silica gel ball is a kind of material with strong adsorption performance, which can adsorb a lot of water or other liquids. The water absorption of silica gel ball mainly comes from its microporous structure and surface chemical characteristics, rather than physical or chemical reactions, so it will not produce exothermic phenomenon. On the contrary, silica gel balls will become more moist and softened after absorbing water, but they will not give off heat.

Although the silica gel ball will not give off heat, it will play a role of drying and preservation in the process of water absorption, and has a wide range of applications in life. For example, silica gel balls can be placed in wet environments such as wardrobes, shoe cabinets and automobiles to absorb moisture in the air, keep the air dry and prevent mold breeding; It can also be used to package food, medicine and other items that are easy to get wet, and play a role in drying and moistureproof.