2013 DESCO INDUSTRIES INC.
Employee Owned
INTERIOR BAG
NUMBER OF DESICCANT UNITS
SURFACE AREA*
**MIH <20%
MIH <30%
MIH < 40%
100 sq. in.
1.5
1.0
130 sq. in.
2.0
1.5
1.0
160 sq. in.
2.0
1.5
200 sq. in.
2.5
2.0
1.5
240 sq. in.
3.0
2.0
1.5
290 sq. in.
4.0
2.5
2.0
340 sq. in.
4.5
3.0
2.5
390 sq. in.
5.0
3.5
2.5
450 sq. in.
5.5
4.0
3.0
510 sq. in.
6.5
4.5
3.5
580 sq. in.
7.5
5.0
4.0
650 sq. in.
8.0
5.5
4.0
720 sq. in.
9.0
6.0
4.5
Table for recommended desiccant usage. Information taken out of EIA-583, Table 1, Page 8.
*To measure interior bag surface area, multiply length x width x 2
**MIH = Maximum Interior Humidity (%)
Desiccant is a drying agent used to lower the moisture
content of air inside a closed space, such as a Moisture
Barrier Bag (ANSI/ESD S11.4 Level 1 and Level 2 Static
Control Bags). Desiccant is packaged in fractional units in
order to facilitate its usage with a variety of bag sizes. One
full “unit” of packaged desiccant will absorb the following
quantities of water at equilibrium with air at 77°F (25°C):
3.00 grams @ 20% rH and 6.00 grams @ 40% rH, when
tested to MIL-D-3464.
In order to provide a complete moisture barrier packaging
assembly, desiccant must be inserted into the bag, prior to
having the bag vacuum sealed. The recommended amount
of desiccant is dependent on the interior surface area of
the bag to be used. The table is a reference indicating
recommended minimum amounts of desiccant that should be
Desiccant paks are available from Desco in the following unit sizes and standard
packages:
Item #
Unit Size
Std. Package
Dimensions
1/2 unit
Box of 700
1.5" x 3"
1 unit
Box of 450
2" x 4"
1 unit
Pail of 300
2" x 4"
1/2 unit
Pail of 550
1.5" x 3"
As packaged Desco 13850 meets MIL-D-3464, Type II and is on the QPL
(Qualified Product List). Click
here to see Desi-Pak (supplier Cage Code 00334).
Fill Contents:
Activated Clay
Paper:
Tyvek
Warranty:
3 Years from date of manufacture
DRAWING NUMBER
13850
DATE:
December
2013
Desiccant Pak
DESCO WEST: 3651 WALNUT AVE., CHINO, CA 91710 WEBSITE:
Desco.com PHONE (909) 627-8178
DESCO EAST: ONE COLGATE WAY, CANTON, MA 02021-1407
PHONE (781) 821-8370
Made in the
United States of America
“...it is important to take possible temperature exposure into account when shipping
electronic parts. It is particularly important to consider what happens to the interior of a
package if the environment has high humidity. If the temperature varies across the dew
point of the established interior environment of the package, condensation may occur. The
interior of a package should either contain desiccant or the air should be evacuated from the
package during the sealing process. The package itself should have a low WVTR.” (ESD
Handbook ESD TR20.20 section 5.4.3.2.2)
Specifications and procedures subject to change without notice.
13843 & 13844
13840 & 13850