The main ingredient of Silica Gel Desiccant is silicon dioxide, which is an amorphous machine product made from sodium silicate and sulfuric acid in silica. It is washed and processed from minerals existing in nature into granules or beads.

The structure of Silica Gel Desiccant is very similar to a sponge. A capillary adsorption system with a huge surface area is formed by interconnected pores, which can absorb and preserve water vapor. Under the condition of 100% humidity, it can absorb and condense water vapor equivalent to 40% of its own weight.

The average pore size of Silica Gel Desiccant is 24 angstroms (angstrom is Angstrom; it is a length unit, 1 angstrom = 10 minus tenth square meter, which is a length unit smaller than nanometers, 1 angstrom = 0.1 nanometer length unit) Silica Gel Desiccant can still absorb moisture even when the temperature is greater than 105 ℃, but when the temperature is greater than 38 ℃, its moisture absorption rate begins to decline, its best moisture absorption state is 21 ℃-32 ℃, even if the relative humidity is 60 %-90%, the relative humidity in the container can also be maintained at 40%.

Because Silica Gel Desiccant is chemically safe, highly safe, non-toxic and non-corrosive, it has been approved by the US FDA for use in the food and pharmaceutical industries. Silica Gel Desiccant has a wide selection of packaging materials, generally including OPP/PE, PET/PE film, non-woven fabric, composite paper, etc.