Material composition of silica gel desiccant
Silica gel desiccant, also known as silicic acid xerogel
Silicic acid xerogel is a transparent or milky white granular solid. It has an open porous structure, strong adsorption, and can adsorb a variety of substances. Its application range is very wide. It is not only used as a special material for aviation, cutting-edge technology, and military technology departments, but also used in various sectors of the national economy.
Molecular structure of silica gel desiccant
Silica gel has good chemical stability, acid resistance, alkali resistance, and good heat resistance. The surface and pore structure of high-purity silica gel will not change significantly when the heat treatment is lower than 700 ℃. There is no uniform classification standard for silica gel. It can be divided into powder, granular, and spherical silica gel according to the particle shape, and can be divided into high, medium and low density silica gel according to the density.
Silica gel desiccant-the main component is silica, which is purified and processed from natural minerals into granules or beads. As a desiccant, its microporous structure has a good affinity for water molecules. The most suitable hygroscopic environment for silica gel is room temperature (20~32) and high humidity (60~90%). It can reduce the relative humidity of the environment to about 40%.
Industrial silica gel desiccant
Performance and safety of silica gel: The main component of silica gel is silica, which is chemically stable and does not burn. Silica gel is an amorphous silica. It is necessary to strengthen the exhaust air to control the dust content of the workshop to 10mg-m. The silica gel has strong adsorption. It has a drying effect on human skin. Therefore, you should wear work clothes during work. If silica gel enters your eyes, you need to rinse with a lot of water and seek medical treatment as soon as possible. Colored silica gel contains a small amount of cobalt oxide, which is toxic. Avoid contact with food and inhalation. In case of poisoning, seek medical treatment immediately.
Storage and packaging: Silica gel has strong moisture absorption capacity, so it should be stored in a dry place. There should be a shelf between the packaging and the ground. The packaging includes steel drums, paper drums, cartons, plastic bottles, polyethylene plastic bags, etc.
Purpose: The silica gel desiccant
for packaging has a variety of packaging specifications, which can be conveniently placed in the packaging of various items to prevent the items from being damp, mildew or rusty.
Determine the amount of desiccant: The amount of desiccant depends on many factors; the size of the desiccant space, the performance of the packaging material, the storage environment of the packaged items, the atmospheric conditions during sealing, the shelf life of the packaged items, and the degree of sealing of the package and many more.