The main ingredients of the container desiccant are calcium chloride and plant starch. Its moisture absorption works through the strong hygroscopic properties of calcium chloride, which draws moisture from the air. When combined with the starch, it forms a gel, effectively preventing liquid leakage. Under conditions of 50°C temperature and 95% relative humidity, its moisture absorption rate can reach 300% within 30 days.

During transportation, the temperature inside the container fluctuates due to day and night cycles, which in turn causes variations in the container’s relative humidity. This often leads to two issues: “container rain” and “cargo sweat“. Container desiccants are specifically designed to address these problems by absorbing excess moisture inside the container, thereby preventing condensation.

Container Rain: When a container moves from a high-temperature region to a lower-temperature one, the internal temperature drops to the dew point. At this point, water vapor condenses into droplets that accumulate on the top and inner walls of the container. These droplets eventually fall onto the cargo.

Cargo Sweat: When goods are transported from a cold region to a warmer one, or when the storage environment shifts from cold to hot, the moisture in the air condenses on the surface of the goods or their packaging, forming water droplets.

Related Link: Product Test Reports >>