Unit Pak line offers drying applications for all size packaging. These
Unit Paks meet or exceed MIL Spec 3464, Type I & II.
A “unit” refers to
a Military Specification for packaging. The term unit is a quantity of
desiccant, which will adsorb a set percentage of its weight at certain
levels of humidity. For convenience, one unit is approximately equal to
one ounce.
Sizes:
Available in 1/6, 1/3, 1/2, 1, 2, 4, 6, 8, 16 or 80 unit
Packaged clay desiccant is a low-cost, efficient desiccant
which will protect the contents of a properly sealed container during shipping and
storage. The contents of a sealed container will be in the same condition as when it was
packaged for shipment or storage.
The addition of a humidity indicator card in each
Clay container allows the container to be visually inspected to insure that the
desiccant remains active and the contents safe.
Unit bags exceed the requirements
of Mil-D-3464 in actual performance and will exceed the moisture vapor adsorption of
silica gel at government specification levels. Clay montmorillonite clay is a
naturally occurring mineral as opposed to a chemically synthesized adsorbent. Therefore it
is more economical than silica gel or molecular sieve.
The Unit Pak performance curve exceeds both
military specification, which is the industry standard, and the silica gel performance
curve for these same specifications.
Typical Applications
for Desiccant Packets
BAG
DATA
Unit Size
U.S. Federal
Stock Number
Bag Dimensions
Width-Length-Thickness
1/6
6850-00-264-6564
3 x 3 x 1/8
1/3
6850-00-264-6561
3 x 3 1/4 x
3/16
1/2
6850-00-264-6568
3 x 3 1/2 x 1/4
1
6850-00-264-6035
5 x 3 1/2 x 1/4
2
6850-00-264-6573
5 x 4 3/4 x 3/8
4
6850-00-264-6574
5 x 6 x 1/2
8
6850-00-264-6571
5 x 8 x 1 1/8
16
6850-00-264-6572
5 3/4 x 10 x 1
1/2
80
8 3/4 x 12 1/2
x 2 1/4
Bag
dimensions are subject to change without notice.
At 20% RH, Unit Pak will
adsorb 50% more moisture than required by Mil-D-3464, whereas silica gel will only adsorb
3.5% more moisture than required by Mil-D3464.
Clay / Tyvek bags meets Method II packaging
standards described in Mil-P-116-E, which covers the basic requirement of military
packaging methods of preservation. This involves packaging an item inside a sealed
waterproof and moisture vapor-proof container with the inclusion of a desiccant to prevent
rust, mildew or corrosion damage. In Method II packaging, the package is maintained at a
safe humidity below 40% RH during the normal storage period of 18 months to 2 years.
T
Tyvek®
Clay Tyvek® bags, an innovation in the industrial desiccants market, are non-dusting. Tyvek® bags
contain no sulphur. Sulphur when placed in contact with a product, may cause corrosion in
many applications such as the electronics industry. Tyvek® is made from high
density polyethylene fibers, is a spunbonded olefin, and is extremely tear-resistant.
Mil-D-3464 dust testing has yielded a result of less than 0.5 mg of dust - truly a
dust-free desiccant.
Class 100 Clean Room
Compatible
Clay Tyvek®
desiccant bags
were tested by an independent laboratory for Class 100 Clean Room use. The 1/8, 1/2, 1/3,
1, 2, 4, and 8 unit bags containing clay desiccant were evaluated. All bags tested emitted
less than 100 particles (0.5 microns in size or larger per cubic foot of air), thereby
certifying clay/tyvek bags as Class 100 Clean Room Compatible.
Tyvek® is a DuPont registered
trademark.
Meets FDA Specifications
Clay
Tyvek bags meet the requirements of the U.S. Food and Drug Administration
for use in contact with food and drugs.
No matter how much care is exercised in producing a desiccant, it
is only effective when it is active. Each pail or drum contains a humidity indicator card
to insure that the desiccant is active when received and opened. To insure that the
desiccant remains active it is essential that the liner be tightly resealed in its
container.
Desiccant is sold in unit size bags according to
Mil-D-3464E. A unit, which is approximately one ounce of desiccant is the amount of
desiccant which will adsorb at least 3 grams of moisture vapor at 20% relative humidity,
and at least 6 grams of moisture vapor at 40% relative humidity at 25°C.
CONTAINER SIZE -
DESICCANT REQUIREMENT
Moisture Sealed
Flexible Barriers
Sealed Barrier
Coated Fiber Drums or Rigid Metal Containers
Poly Lam Products, Corp.
80 Earhart Drive
Williamsville, New York 14221
USA
For
additional information please
please
fill out our information form located here
Phone in the USA and Canada - 800-836-9648 All other countries 716-633-1977 Fax 716-633-2007 Website: http://www.polylam.com
E-Mail: information@polylam.com
