UniSorb® Clay Mineral Desiccants
UniSorb® is the new generation of transport protection for the reduction
of dew point and control of condensation. UniSorb's® innovative design allows
water vapor to enter the interior of the bag easily, where it is transformed into
a thick gel and will not leak, escape or spill.
UniSorb® desiccants are manufactured from Calcium Chloride
(CaCl2) and clay minerals. The large 1kg and 2kg bags are encased
in a fully woven material with sewn seams to offer maximum strength
and product consistency. They are then sealed inside DuPont's
special Tyvek material to prevent any liquid leakage.
Independent testing by SGS International (at 37° 90% RH)
has shown UniSorb® to uptake 100% of its own weight in water,
without chloride migration. |
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When containers are loaded and shipped through fluctuating temperatures and relative humidity
the possibility of condensation occurring is substantial as temperatures drop. UniSorb® helps
keep the dew point temperature below the actual temperature, even when the actual temperature
drops within the shipping container due to fluctuations. "Dew Point Temperature" is the temperature
at which water vapor begins to condense onto a surface forming liquid water. The liquid that
results inside a container is called "Container Rain". Container rain will occur if the surface
temperature of an object is equal or lower than the dew point temperature. If the relative humidity
is lowered with the absorbing properties of UniSorb®, the dew point temperature is also lowered,
stopping container rain.
UniSorb® Clay Desiccant Sizes.
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100 GRAMS
Suited for electrical components, and the exterior of palletised
goods. |
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500 GRAMS
Suited for marine and engineering components, medical applications
and explosives. |
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1 KILOGRAM
Suited for machinery, boats, base metals, steel, iron, metal
cans, automotive products (car seats, brake linings), electronic
and digital equipment etc.
1kg now available with hanging hooks
for quicker installation! |
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2 KILOGRAMS
Suited for usage in 20 and 40 foot containers. Ideal for protection
of canned goods, glass paper, cardboard, packed flour, canned
pet food and cheese, milk in cartons, agricultural products (i.e.
Hay), horse feed, leather products, any cartoned packaging, pharmaceuticals
etc.
2 kg now available with hanging hooks
for quicker installation! |
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Condensation in your container? What are the causes…?
- Containerised cargo can be subjected to significant temperature
variations when stored on deck in the sun, whilst in storage awaiting
trans shipment, or whilst crossing the equator.
- As the temperature in the container rises the enclosed air is
able to absorb more moisture. There are many sources of moisture
in a container – the wooden floor and pallets, packaging material
and possibly the cargo itself.
- Conversely, when there is a drop in temperature the air is not
able to hold this extra moisture, which is then released in the form
of condensation. The temperature at which this condensation takes
place is called the DEW POINT.
A typical cycle is therefore:
- As the temperature rises in a container, the enclosed air draws
moisture from all possible sources inside the container, i.e. the
wooden floor, pallets, product packaging and even the product itself.
- Then as the temperature drops, i.e. during the night, during atmospheric
changes, or when the ship moves into a colder climate, the moisture
is released and condenses on the container’s roof and sides.
- The water that drips from the roof of the container, together
with the condensation that forms on the product causes corrosion,
mould, caking of powders, and damage to labels and packaging.
- This process of warming and cooling repeats itself numerous times
during a voyage, causing the damaging moisture cycle to repeat itself.
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How do UniSorb® Desiccants work?
- UniSorb® desiccants are manufactured under controlled conditions
in order to assure you of an absolutely dry desiccant upon delivery.
- After your container has been packed, and the specially formulated
film enclosing the UniSorb® bag removed, the desiccant will immediately
start to absorb any moisture present inside the container.
- On the container doors being closed, UniSorb® controls the
humidity inside the container by continuously absorbing the moisture
from the enclosed air inside the container. UniSorb® is designed
to hold the moisture and not release it back into the container’s
climate.
- As the humidity inside the container is kept continuously low,
the air is dry enough to prevent condensation forming at low temperatures.
- UniSorb® will continue to absorb the moisture until it has
gained approximately 100% of its own weight (see
graph).
Positioning your UniSorb® desiccants.
Placing your UniSorb® in strategic positions inside your container
should ensure a dry cargo out turn at the final destination. Hanging
Hooks on the UniSorb® bags allow the easy application to the interior
ceiling rings, located inside the shipping containers.
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| In a container |
On a pallet |
Innovative Design
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1. Hook
For quicker and more flexible installation.
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2. Double Packaging
Exterior made from Tyvek to prevent leakage and non-woven interior
to reinforce strength.
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3. Humidity Indicator
A pink reading indicates that the humidity inside the container
has reached 90%RH 37. Consistent levels of 90% and above will
result in water damage, mill dew and mould.
“UniSorb” if placed correctly and in sufficient
numbers will protect your cargo and keep it dry. |
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Absorbent
The Active Mineral is made from Montmorillonite clay mixed with Calcium
Chloride along with several physical and chemical processes including
reaction, granule-making, sifting and drying.

- At 90%RH, 37o, the absorption capacity will be approximately 100%
of its weight.
- It continues to reduce relative humidity down to a low level,
which decreases the dew point temperature even further.
- Has the ability to protect shipments from start to finish, through
all temperature ranges and relative humidity variances.
- Completely safe, non-toxic materials. UniSorb® Desiccants
can be disposed with regular waste.
Packaging Material - TYVEK
- DuPont Tyvek® is made from 100% high-density polyethylene,
which is spun into tough, continuous fibers to protect package integrity
from both product breakthrough inside and rough handling outside.
- Tyvek® uses a combination of paper, film, and fabric to provide
exceptional strength, durability and high porosity.
- Tyvek® is built tough and is designed to resist punctures making
it ideal for use in abrasive environments. Tyvek’s tight pore
structure keeps even the smallest of particles from dusting through
the package.
- Tyvek® is used for both desiccant packets and bags.

- Tyvek® is strong, light weight, flexible, smooth, and low-linting.
It is resistant to water, chemicals, abrasion and aging.
- The Tyvek® bag is also extremely tear-resistant, providing
extra protection for your product. MIL-D-3464E dust testing has yielded
a result of less than 0.5mg of dust. SGS Report 2080114/LD shows
the sulfur content is 243PPM which is safe for electronics product.
- Tyvek® also meets the requirements of the U.S. Food and Drug
Administration for use in direct contact with food and drugs.
Typical Applications – UniSorb® Desiccants

> UniSorb Clay Desiccants Information Sheet (Acrobat PDF)
> UniSorb Clay Material Safety Data Sheet (Acrobat PDF)
Desiccants - Wikipedia