The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to be replaced by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, and so on. Silica gel can be divided into macroporous silica gel, macroporous silica gel, B-type silica gel, fine porous silica gel, etc. It is used together with ordinary silica gel desiccant to indicate the moisture absorption degree of desiccant and judge the relative humidity of the environment. As a silica gel desiccant for packaging, it is widely used in precision instruments, leather, clothing, food, medicine, and household appliances. Because of its food-grade use, silica gel can be used as baby pacifiers and other products in direct contact with the human body. In addition, silica gel can also be used to produce condoms and breast augmentation.
