High-performance desiccant is a kind of chemical adsorbent, which is composed of magnesium chloride, magnesium oxide, etc., and is wrapped in a package that made of high-strength breathable and waterproof material. The main feature of high-performance desiccant is that it absorbs moisture in the air through chemical reactions. The strong adsorbent only absorb moisture and barely release moisture. Different from other physical adsorbents, such as silica gel, montmorillonite, molecular sieve, this type of adsorbent is spontaneously forming a dynamic equilibrium process of adsorption and desorption as the temperature and humidity of the external environment change. Through customized high-strength breathable and waterproof packaging material, the moisture absorption speed can be effectively controlled.
In a completely sealed environment, the high-performance desiccant can effectively protect the product life for more than 2 years.
The main moisture-absorbing component in high performance desiccant is magnesium chloride. At the same time, there is also a component called magnesium oxide. After magnesium chloride absorbs moisture, magnesium oxide, magnesium chloride, and water will form into Ternary compound — compound crystal salt and a part of condensation Colloid, which called magnesium oxychloride cement. Magnesium oxychloride cement can harden quickly under normal temperature and pressure to form artificial stone with relatively high brittleness and high hardness. This can ensure that the absorbed moisture will not desorb and release water vapor when the temperature and humidity of the environment change at room temperature, to achieve the effect of keeping the product dry.
The packaging material of the high-performance desiccant is composed of multiple layers of different types of polymer materials. Through the control of the pore size and density of the material, packaging materials with different moisture absorption speeds and different heat-resistance temperature can be made to meet different shelf life and different use environments, temperature requirements.
Magnesium chloride and magnesium oxide are mainly obtained by calcining natural ores. Once magnesium oxychloride cement formed, itis not suitable for the desiccant to be reused and can be discarded as general non-toxic and harmless waste.