Functions of Shipping Container Desiccants
Shipping Container desiccants can also absorb moisture up to 280% of their dry weight, unlike other desiccants such as silica gel and activated clay, which only have an absorption rate of 25-30%. Moreover, its Tyvek leak-proof packaging materials allow water vapour to be absorbed and transformed into a thick gel-like structure, eliminating the potential for liquid spillage.
Types of Container Desiccants
Shipping container desiccants are available in a wide variety, providing versatile protection against moisture and humidity damage during transit. They come in bags and contain a non-toxic clay desiccant mixed with a trace of calcium chloride, making them an excellent choice for transporting items such as coffee beans, canned foods, flour, rice, and many others. Stream Peak offers four types of shipping container desiccants to prevent damage to transport goods and significant economic losses.
Humi Dryer Bag
The Humi Dryer Bag is a container desiccant bag containing a toxic-free, natural clay desiccant infused with a bit of calcium chloride. It has a high vigorous absorption quality over a wide temperature range. The Humi Dryer Bag retains moisture and maintains low humidity levels, absorbing up to 80% of its weight in shipping containers. It absorbs and holds moisture inside the bag as a thick gel that will not turn into water vapour even in high-temperature environments during transit, reducing the risk of potential moisture damage to shipping goods.
Humi Dryer Pole
The Humi Dryer Pole is a container pole desiccant manufactured from polymer gelling agent and calcium chloride designed to prevent condensation on the walls and roof of the container by decreasing the dew point and maintaining a relatively low humidity level. It can be secured either by directly hooking it to the container’s wall ring or simply placing it on the container floor.
It is specially designed to fit in-between the grooves of the shipping container walls due to its pole composition, maximising shipping space while protecting cargo from water vapour by allowing moisture to enter the desiccant, where it quickly takes a gel-like structure. Also, its protective packaging inhibits condensation and leakage from temperature changes in the shipping container.
Humi Dryer Strip/Strip Plus
The Humi Dryer Strip is a non-toxic, natural clay desiccant mixed with a small amount of calcium chloride that works as a dehumidifier and moisture absorber inside the container or packaging. Capable of absorbing water vapour up to 80% of its weight, the Humi Dryer Strip efficiently removes moisture and lowers humidity levels in the shipping container to ensure a dry surrounding environment, protecting goods from potential moisture and humidity damage during transit and storage. The Humi Dryer Strip can either be fixed by attaching it with a hook to hang it or simply placing it in the container.
The Humi Dryer Strip is also in an advanced version – the Humi Dryer Strip Plus. The Humi Dryer Strip Plus is a specially formulated desiccant made from a calcium chloride polymer gelling agent. It is designed to inhibit condensation on the container walls and roof by lowering the dew point and reducing the humidity level inside shipping or storage containers, protecting cargo from moisture damage while shipping.
Instead of a moisture absorption capacity of 80% like the Humi Dryer Strip, The Humi Dryer Strip Plus can absorb water vapours up to 280% of its weight, a considerable amount of moisture. The Strip Plus allows moisture to enter the desiccant, which takes a gel-like form, preventing container rain and assuring a dry container environment for shipping goods.
Selecting the Right Shipping Container Desiccant
Choosing the appropriate shipping container desiccant is a critical step in ensuring effective moisture control during cargo transit. The selection process requires a thoughtful consideration of various factors to match the desiccant’s capabilities with the specific requirements of the shipment. Here, we explore the key considerations and steps involved in selecting the right shipping container desiccant.
- Cargo Type and Sensitivity: Different types of cargo have varying moisture sensitivity levels. For instance, electronics, pharmaceuticals, and food products are highly sensitive to moisture and require stringent moisture control. Conversely, less sensitive cargo like machinery or non-perishable goods may have lower moisture-related risks. Understanding the moisture sensitivity of the cargo is crucial in determining the desiccant’s capacity and effectiveness needed for protection.
- Container Size and Volume: The size and volume of the shipping container directly impact the amount of moisture that can accumulate inside. Larger containers have more air space, which can accommodate more moisture. Smaller containers, on the other hand, may require smaller, strategically placed desiccants. Calculating the container’s internal dimensions and volume is essential for determining the desiccant quantity.
- Shipping Duration: The duration of the shipping journey can vary greatly, from a few days to several weeks or even months. Longer transit times increase the likelihood of moisture-related issues. It’s vital to select desiccants with the capacity to maintain moisture control throughout the entire journey. This may involve choosing desiccants with higher moisture-absorbing capabilities.
- Environmental Conditions: The climate and environmental conditions of both the origin and destination locations can significantly affect moisture levels within a shipping container. Consider factors like temperature, humidity, and seasonal variations. Desiccant selection should account for the expected environmental conditions during transit to ensure optimal performance.
Desiccants, with their ability to prevent condensation, protect against humidity, thwart mold and mildew, control corrosion, and preserve product quality, act as sentinels of cargo quality. By understanding the functions of shipping container desiccants, cargo owners and logistics professionals can enhance the safety, reliability, and reputation of their shipping operations. These moisture-absorbing agents ensure that goods reach their destinations in pristine condition.