TECHNICAL BULLETIN TB-2031 Statshield Moisture Barrier Bags Made in the Application Instructions United States of America Notes: Thickness - Typical value. Nominal 10% per MIL-STD-3010 1003 Moisture Barrier Transfer Rate (MVTR) - Measured per ASTM F1249 Puncture Resistance measured per MIL-STD-3010 2065 Construction Descos Statshield Moisture Barrier Bags manufactured from a static dissipative metalized laminated film. The metal layer of the Descos Statshield Moisture Barrier Bags and Statshield High Moisture Barrier Bags is created by vacuum deposited manufacturing technique. This manufacturing technique allows for a more flexible finished bag that is Figure 1. Desco Statshield Moisture Barrier Bag less likely to tear or rip during use. Finished bags with Description foil layer, such as Descos Statshield Foil Moisture Barrier Bags provides a better moisture barrier and Desco Statshield Moisture Barrier Bags combine the is a good choice when having to meet IPC/JEDEC properties of a MOISTURE BARRIER protection with J-STD-033D Standard. EMI-RFI-ESD shielding. Statshield Moisture Barrier Bags meet the electrical and physical requirements Static Dissipative of ANSI/ESD S20.20, Packaging standard ANSI/ESD Polyester S541, and Static Control Bag ANSI/ESD S11.4. All Statshield Moisture Barrier Bags are amide, amine, Vacuum Deposited Aluminum and silicone free and pass outgassing and corrosion Shielding tests. All bags are printed with ESD protective symbol Layer and the Moisture-Sensitive Identification Label and are dated and lot coded for quality control traceability. Polyester Layer All three styles are available in a variety of standard Vacuum Deposited sizes, custom sizes and with custom printing. Aluminum Shielding Layer High Performance Static Desco offers three styles of Moisture Barrier Bags: Dissipative Polyethylene Moisture Barrier Bags - Static Control Bag ANSI/ESD S11.4 Level 2 Figure 2. Statshield MBB bag and High Moisture MBB - Thickness .0035 (.0889mm) Bag Layer construction. - Moisture Barrier Transfer Rate (MVTR) 0.020 2 grams/100 in /day - Puncture Resistance >20 lbs Abrasion Resistant Coating High Moisture Barrier Bags Static Dissipative - Static Control Bag ANSI/ESD S11.4 Level 2 Polyester Layer - Thickness .0065 (.1651mm) - Moisture Barrier Transfer Rate (MVTR) 0.020 Solid Aluminum 2 grams/100 in /day Foil Layer - Puncture Resistance >30 lbs Foil (EMI/RFI) Moisture Barrier Bag High Performance Static Dissipative - Static Control Bag ANSI/ESD S11.4 Level 1 Polyethylene Interior Layer - Thickness .0040 (.1061mm) - Moisture Barrier Transfer Rate (MVTR) 0.020 2 grams/100 in /day Figure 3. Statshield Foil (EMI/RFI) MBB Bag Layer - Puncture Resistance >27 lbs construction DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Web Site: Desco.com 2021 DESCO INDUSTRIES INC. TB-2031 Page 1 of 3 July 2021 Employee OwnedDesiccant packs are available from Desco in the Dry Packing Information following unit sizes and standard packages: The Statshield Moisture Barrier Bag, Desiccant Packs and Humidity Indicator Cards have been developed for Item Unit Size Std. Package use in DRY PACKAGING applications. In order for the MBB bag and its accessories to perform properly, 13840 1/2 unit - 1.5 x 3 Box of 700 Desco recommends the user follow procedures defined 13844 1 unit - 2 x 4 Pail of 300 in IPC/JEDEC J-STD-033D. 13850 1/2 unit - 1.5 x 3 Pail of 550 DESICCANT Desiccant packs sold by Desco meet the requirements Desiccant is a drying agent used to lower the moisture of MIL-D-3464. For more detailed information, see content of air within a closed space, such as a Drawing 13850. sealed Moisture Barrier bag. Desiccant is packaged in fractional units in order to facilitate its usage with HUMIDITY INDICATOR CARDS a variety of bag sizes. One full unit of packaged Humidity Indicator Cards contain chemically desiccant will absorb the following quantities of water impregnated, humidity sensitive, indicating spots that at equilibrium with air at 77F (25C): 3.00 grams will change color with moisture. The comparison bar is 20%RH and 6.00 grams 40%RH, when tested to used to determine relative humidity of air. Select the MIL-D-3464. indicating spot that most closely matches the color of the comparison bar. The measured relative humidity is the percentage indicated on the matching spot. The chemical reaction of the indicating spots is completely reversible the spots will continue to change color as the moisture levels change. Figure 4. Desiccant packs In order to provide a complete moisture barrier packaging system, desiccant must be inserted into the bag, prior to having the bag vacuum sealed. The 13868 13869 13870 recommended amount of desiccant is dependent on the interior surface area of the bag to be used. Figure 5. Humidity Indicator Cards Figure 5 is a reference table indicating recommended minimum amounts of desiccant that should be used Item Card Size Cards/Can Relative Humidity with Moisture Barrier Bags. 13868 2 x 3 125 5/10/15 13869 2 x 3 125 5/10/60 INTERIOR BAG NUMBER OF DESICCANT UNITS SURFACE AREA *MIH <20% MIH <30% MIH < 40% 13870 2 x 3 125 10/20/30/40 100 sq. in. 1.5 1.0 1.0 130 sq. in. 2.0 1.5 1.0 160 sq. in. 2.0 1.5 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 Figure 5. Table for recommended desiccant usage. Information taken out of EIA-583, Table 1, Page 8 *MIH - Maximum Interior Humidity. DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 (909) 627-8178 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 (781) 821-8370 Web Site: Desco.com 2021 DESCO INDUSTRIES INC. TB-2031 Page 2 of 3 Employee Owned