ESD-Safe Aluminum Foil Bags for MSL-Rated Components & Long-Term Storage (WVTR < 0.05 g/m²/day | IPC/JEDEC J-STD-033 | Vacuum Sealable)
Our moisture barrier bags (MBBs) are engineered for the most demanding electronics packaging requirements — where both moisture ingress and electrostatic discharge must be controlled simultaneously. Built with a multi-layer aluminum foil laminate structure, these bags provide an exceptional moisture vapor barrier (WVTR < 0.05 g/m²/day) combined with inherent ESD shielding from the continuous aluminum foil layer.
Designed to meet IPC/JEDEC J-STD-033 requirements for moisture-sensitive devices (MSDs), these bags are the standard outer packaging for components with Moisture Sensitivity Levels (MSL) 2 through 6. Used together with desiccant packs and humidity indicator cards (HICs), they create a complete dry-pack system that maintains floor life integrity during storage, shipping, and distribution.
Multi-Layer Structure
|
Layer |
Material |
Function |
|
Outer Layer |
PET (Polyester) |
Printable surface, mechanical protection, abrasion resistance |
|
Barrier Layer |
Aluminum Foil (6–9 µm) |
Moisture barrier, gas barrier, ESD shielding |
|
Bonding Layer |
Adhesive / Nylon (optional) |
Lamination strength, puncture resistance |
|
Inner Layer |
LDPE / LLDPE (anti-static) |
Heat-sealable, low-charging contact surface |
Technical Specifications
|
Property |
Specification |
|
Material |
PET / Al Foil / Nylon (optional) / Anti-static PE |
|
WVTR (Moisture Vapor Transmission Rate) |
< 0.05 g/m²/day (at 38°C, 90% RH, per ASTM F1249) |
|
OTR (Oxygen Transmission Rate) |
< 0.5 cm³/m²/day (per ASTM D3985) |
|
Surface Resistivity (inner) |
< 10¹¹ Ω/sq (per ASTM D257) |
|
Shielding Effectiveness |
Complete — continuous aluminum foil layer |
|
Static Decay Time |
< 2.0 s (5,000V → 50V, per ANSI/ESD STM 11.11) |
|
Total Thickness |
0.10–0.15 mm typical (customizable) |
|
Available Sizes |
100×150 mm to 600×1000 mm (custom sizes available) |
|
Seal Type |
3-side seal / top-open / zip-lock resealable |
|
Color / Appearance |
Silver opaque (aluminum finish) |
|
Puncture Resistance |
≥ 15 N (per ASTM D4833) |
|
Heat Seal Temperature |
160°C – 200°C |
|
Seal Strength |
≥ 30 N/15mm (per ASTM F88) |
|
Vacuum Compatible |
Yes — suitable for vacuum sealing |
|
Printing |
ESD/MSD warning labels, MSL level, barcode, custom text |
Key Features
· Dual protection — Aluminum foil provides both complete moisture barrier and ESD shielding in one package
· Ultra-low WVTR — < 0.05 g/m²/day keeps MSL-rated components within floor life specifications
· Vacuum sealable — Compatible with vacuum packaging for maximum moisture exclusion
· J-STD-033 compliant — Meets IPC/JEDEC requirements for dry-packing moisture-sensitive devices
· Anti-static inner layer — Low-charging PE contact surface protects components during insertion and removal
· Superior mechanical strength — Multi-layer laminate with optional nylon for high puncture resistance
· Custom printing — MSL labels, ESD/MSD warnings, barcodes, lot tracing, company branding
· Compliant — IPC/JEDEC J-STD-033, ANSI/ESD S541, IEC 61340-5-3, MIL-PRF-81705 Type III
Dry-Pack System Components
|
Component |
Function |
Included / Sold Separately |
|
Moisture Barrier Bag |
Outer packaging, moisture & ESD barrier |
Core product |
|
Desiccant Pack |
Absorbs residual moisture inside sealed bag |
Available separately |
|
Humidity Indicator Card (HIC) |
Visual verification of internal humidity level |
Available separately |
|
MSL Warning Label |
Identifies moisture sensitivity level & floor life |
Printed on bag or supplied separately |
Moisture Barrier Bags vs. Static Shielding Bags
|
Feature |
Moisture Barrier Bag |
Static Shielding Bag |
|
Primary function |
Moisture barrier + ESD |
ESD shielding only |
|
Moisture protection |
Yes (WVTR < 0.05) |
No |
|
ESD shielding |
Yes (aluminum foil) |
Yes (metalized PET) |
|
Transparency |
Opaque (silver) |
Semi-transparent (silver) |
|
Vacuum sealable |
Yes |
Not recommended |
|
IPC/JEDEC J-STD-033 |
Required for MSL 2–6 |
Not sufficient alone |
|
Cost |
Higher |
Lower |
|
Typical use |
Shipping, long-term storage |
In-plant handling, short-term |
Applications
· Dry-packing MSL-rated ICs, BGAs, QFPs, and SMD components
· Long-term storage of moisture-sensitive semiconductors
· Export shipping of PCB assemblies and electronic modules
· LED and optoelectronic device packaging
· Medical electronics and implantable device packaging
· Aerospace and defense component storage
· Automotive electronics (ECU, sensor) shipping
Call to Action
Need MBBs with custom MSL labels, specific laminate structure, or matched desiccant/HIC kits? Contact us for a complete dry-pack solution.
