1. Adsorption capacity of desiccant

For different desiccant products, if at the same price, the higher adsorption capacity the desiccant has, the more it shall get prior consideration.

2. If desiccant package has good air permeability and leakage resistance capacity at the same time.

Desiccant package shall have good air permeability, or desiccant can’t effectively absorb moisture and prevent the cargo from humidity damage. However, it is not enough. Truly qualified package requires also reliable leakage resistance ability. The package materials of a lot of the desiccant products in the current market, have merely air permeability, but no anti-leakage ability. After desiccant adsorbing, moisture vapor condenses into liquid water, which escapes through the package and drops down to the goods. As a result, the goods is not being protected, but in fact being damaged. It brings big loss to the consignors or consignees!

3. The procurement cost of desiccant at the same moisture adsorption.

According to the cargo tracking test results offered by relevant international institute, to guarantee the safety of goods, in a 20 'container, container desiccant shall adsorb at least 8 KG water vapor from the air. For example, there are three kinds of desiccant products A,B,C, their moisture absorption capacity were 40%, 75%, 100% respectively, then 20 KG, 10.67KG, 8KG are needed. You can compare the three’s procurement costs.

4. If the design of desiccant is reasonable, and if the use of desiccant is convenient.

Some shippers paymuch attention to space saving as the containers are very fully loaded.With the hook
design, the desiccant can be hung on the hoops on the container wall; with long shape design, desiccant can be inserted into the grooves on the container wall. For both designs, space saving is taken into account.

 

Superior features of Calcium Chlodride Silicagel và Bột Calcium Chloride

Comparison critearia

Calcium Chloride

Silica Gel

Absorption Capacity

Desiccant materials absorb greater
amounts of moisture when the
relative humidity of the surrounding
air is higher.

150%

At a relative humidity (RH) of only 50%, calcium
chloride’s moisture absorption is 150% its weight in
water. Its absorption increases exponentially as RH
rises, to 600% at 85%RH.

25%


Silica gel absorbs poorly at low RH, trapping only 25%
of its weight at 50% humidity. Unlike calcium chloride’s
exponential curve, silica gel’s absorption is more
linear—only 36% at 85%RH.

Safe Against Exhaustion

Some absorbers can exhaust
themselves before the voyage has
completed, due to temporary
humidity spikes

Yes

Calcium chloride is self-limiting, allowing it to continue
protecting for long periods without running itself out
during short periods of high RH. Spikes are dampened
but without saturating the desiccant.

No

Silica gel absorbs water into microscopic pores. If a
short spike in humidity is encountered early in the
voyage, all pores can physically saturate, leaving cargo
unprotected.

Environmentally Safe

Many absorption materials contain
moisture indicator additives that are classified as toxic.

Yes

Glodric products contain only calcium chloride, a naturally occurring compound abundant in seawater. Non-toxic, it can be disposed with regular wastewater.

No

Many silica gels contain cobalt compounds that are
considered carcinogenic and require special disposal
using hazardous waste procedures.

 

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