Why aren't silica gel desiccants used for moisture prevention in container shipping?

Release Time：

2020-01-17

Why aren't silica gel desiccants used for moisture prevention in container shipping? According to Hengyuan Desiccants, moisture-proof agents are used in container shipping, mostly calcium chloride-based container desiccants. So why aren't silica gel-based desiccants used for moisture prevention? It is well known that silica gel desiccants are relatively cheaper than calcium chloride desiccants on the market. So why aren't silica gel desiccants used for moisture and mildew prevention of goods in containers?

Container Why isn't silica gel desiccant used for moisture-proof transportation in Hengyuan? Desiccant I understand that desiccants are used in container shipping, mostly those using calcium chloride as a raw material. Container desiccant So why not use silica gel as a raw material for moisture-proof desiccants? It is well known that silica gel desiccants are relatively cheaper than calcium chloride desiccants on the market. So why aren't silica gel desiccants used to prevent moisture and mildew in containers?

The reason is simple. Whether a desiccant can be used for moisture-proof container transportation depends primarily on its moisture absorption effect. As we all know, the moisture absorption rate of silica gel desiccant is much lower than that of calcium chloride, only about 20%. Moreover, the continuous moisture absorption time of silica gel desiccant is short, only about a week. At the same time, the vaporization rate after moisture absorption is very high, so it can be said that silica gel desiccant not only cannot solve the problem of cargo drying in containers, but also may cause secondary pollution and moisture damage to the goods.

　　Calcium chloride desiccant is different. Calcium chloride desiccant has a strong moisture absorption capacity. Container desiccants using calcium chloride as a raw material can have a moisture absorption capacity as high as 200%, with continuous moisture absorption for up to 90 days. Only this kind of desiccant can solve the problem of mildew and dampness of goods during container transportation.

　　The above is why silica gel desiccant is not used for moisture-proof container transportation? For more information on Desiccant please follow Hengyuan desiccant.

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