Container Desiccant Outer Packing
Simple test of air permeability and water repellence upon outer package

no-woven dupont Tyvek packaging
(click to enlarge it)

Simple test of air permeability:

Put some CaCl2 in flake or granular into a small bag made of laminated non-woven, heat sealed. A few days later, CaCl2 turns into liquid. It proves that the material has good air permeability.

Pay special attention to anti-leakage capacity of the package of container desiccant:

* Simple test of water repellence upon outer package:

Seal a bag made of outer package, with water inside, hoisting for 1 month. No water leakage is found. Or seal a glass tightly with a piece of the material of outer package, with 2/3 glass of water inside, inverting the glass on an absorbent paper. After three days, the absorbent paper remains completely dry. The tests prove that the material is extremely reliable anti-leakage capacity.

Water inside the glass
Water inside the bag
No leakage

Truly qualified package of container desiccant requires not only has good air permeability, but also have reliable ability of anti-leakage. For a lot of the desiccant products in the current market, their package materials 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!