2010 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
0.5
200 sq. in.
2.5
2.0
1.5
240 sq. in.
3.0
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. 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. Figure 4 is a reference table
indicating recommended minimum amounts of desiccant that should be
used with Moisture Barrier Bags.
Desiccant paks are available from Protektive Pak in the following unit sizes and
standard packages:
Item # Unit Size
Std. Package
Dimensions
1/2 unit
Pail of 550
1.5" x 3"
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"
Desiccant paks sold by Protektive Pak meet the requirements
of MIL-D-3464.
Fill Contents:
Activated Clay
Paper:
Tyvek
DRAWING
NUMBER
48881
DATE:
May
2010
Desiccant Pak
PROTEKTIVE PAK
13520 MONTE VISTA AVENUE, CHINO, CA 91710
PHONE (909) 627-2578, FAX (909) 363-7331
Made in 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)
48887 & 48888
48880 & 48883
REACH Directive 1907/2006/CE
This material should be considered an “article” under the REACH guidelines. None
of the substances listed as “Substances of Very High Concern” (SVHC) are
intentionally added in its manufacturing.
Specifications and procedures subject to change without notice.
