Container desiccant Refers to a substance that can remove moisture from moist substances, generally translated as "desiccant" in English, and there are many types.

It can be generally divided into two categories: chemical desiccants, such as calcium oxide (quicklime) desiccant, which undergoes a chemical reaction to become slaked lime after absorbing water; and physical desiccants, such as silica gel, which adsorbs water vapor through the microscopic pores inside the silica gel without undergoing a chemical reaction with water. According to the components, it can be divided into silica gel desiccant, montmorillonite desiccant molecular sieve desiccant, calcium chloride desiccant, calcium oxide desiccant, fiber desiccant, etc.; different raw materials for different desiccants also have different packaging materials, such as non-woven fabrics, grid paper, some PE/PET composite materials, plastic boxes/barrels/bottles, etc.

With the rapid development of global economic trade, the vast majority of goods transported around the world are currently loaded in containers and then transported to various destinations, and most of these containers are transported by sea. However, during ocean transportation (long-term intercontinental rail transportation will also have the following phenomena), containers often experience high humidity marine climates and large diurnal temperature variations. During the day, the high-temperature air rich in water vapor sealed in the container, due to the decrease in temperature at night, the water vapor reaches supersaturation, and the water vapor in the container will condense into water droplets on the inner wall of the container, which is commonly known as "container rain" (if the goods are sealed packaging, under the effect of temperature difference, the water vapor that cannot evaporate inside the goods packaging will condense inside the packaging material). This liquid water will seriously affect the goods or outer packaging in the container, easily causing metal rust or oxidation, cardboard softening and mildew, and a layer of black mold on wooden boxes, etc.

In order to solve the problem of goods getting damp, people have adopted different methods and measures, one of which is to use desiccants inside the container, which is the origin of container desiccants. By now, I believe everyone should have a general understanding of container desiccants. Therefore, Container desiccant should be understood as a general term for substances used in containers to remove moisture from the air.

Container desiccant In addition to industry restrictions and limitations of the chemical properties of the desiccant itself, then most desiccant can be used in containers, only the dehumidification effect is different.