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Moisture-proof Aluminum Foil Bag | 7-Micron Barrier Film
The Moisture-proof Aluminum Foil Bag is a hermetic barrier packaging pouch engineered specifically for electronics components and industrial products that require reliable protection from humidity during storage, transit, and long-term inventory holding. Built on a PET/AL/PE multi-layer laminate with a continuous solid aluminum foil core, the bag delivers a near-zero Water Vapor Transmission Rate (WVTR) — the highest level of moisture protection available in flexible packaging. Heat-sealed with a standard impulse sealer, it creates an airtight, tamper-evident closure that meets JEDEC J-STD-033 moisture barrier bag (MBB) requirements for moisture-sensitive device (MSD) storage and shipment. Manufactured at our Suzhou facility and supplied to electronics manufacturers and industrial distributors across Southeast Asia.
Why Moisture Barrier Packaging Matters in Southeast Asia
Southeast Asia’s tropical climate — ambient humidity regularly exceeding 80% RH across Vietnam, Thailand, Malaysia, Singapore, and Indonesia — creates packaging conditions far more demanding than temperate regions. Electronic components absorb atmospheric moisture during storage, leading to corrosion of metal contacts, delamination of PCB substrates, and the “popcorn effect” during SMT reflow soldering, where trapped moisture vaporizes and physically damages the component. For manufacturers and distributors operating in this region, a solid aluminum foil moisture barrier bag is not optional protection — it is the minimum viable specification for any humidity-sensitive component.
Structure & Materials
Product Specifications
| Material Structure | PET / AL / PE multi-layer composite |
| Aluminum Foil Core | Solid foil, 7–12 microns |
| WVTR | < 0.01 g/m²/24hr (near-zero) |
| Total Bag Thickness | 0.10 mm / 0.14 mm (customizable) |
| Heat-seal Temperature | 130–160°C (standard impulse sealer) |
| Internal RH (sealed + desiccant) | < 10% RH |
| Custom Size | Max width 1500 mm; length fully customizable |
| Color / Print | Silver default; 1–8 color custom printing on outer PET |
| Compliance | JEDEC J-STD-033 MBB |
| MOQ | Low MOQ supported; samples available |
Key Features
Near-zero WVTR
The solid aluminum foil core delivers a Water Vapor Transmission Rate below 0.01 g/m²/24hr — near-zero moisture transmission that maintains dry conditions around packaged components regardless of external humidity. This is the defining performance advantage of aluminum foil over all plastic-based packaging alternatives.
Hermetic Heat-seal Closure
Heat-sealed at 130–160°C using a standard impulse sealer, the closure eliminates any moisture ingress pathway through the bag opening. Once sealed, the bag cannot be reopened without cutting, providing tamper evidence for inventory control and incoming goods inspection.
Desiccant Compatible
For components classified at MSL 2 and above under JEDEC J-STD-033, sealing with a silica gel desiccant packet removes residual moisture and maintains internal relative humidity below 10% RH — preventing contact corrosion and the popcorn effect during subsequent reflow soldering.
Humidity Indicator Card Compatible
A humidity indicator card (HIC) placed inside the sealed bag provides visual confirmation of bag integrity at the point of opening — standard practice in professional electronics manufacturing to detect any seal failure during storage or transit.
Long-term Storage Integrity
When properly heat-sealed with desiccant, components remain protected for 12 months or more. For safety stock and slow-moving MRO inventory in warehouse environments, aluminum foil bags provide the only reliable long-duration moisture barrier in flexible packaging.
Custom Sizes & Printing
All dimensions are manufactured to order. Custom printing on the outer PET layer — including part numbers, handling instructions, and moisture sensitivity labels — is available with low MOQ.
Applications
Moisture-sensitive SMDs & IC Packages
Sealed storage for surface-mount devices, BGA packages, QFP/QFN, and other JEDEC MSL 2+ classified components awaiting SMT assembly — preventing moisture absorption that causes popcorn cracking during reflow.
Long-term Inventory & Safety Stock
Warehouse storage of slow-moving electronic components and MRO spare parts in tropical climates where open storage inevitably leads to oxidation, contact corrosion, and rejected components at the point of use.
Ocean Freight & Export Shipment
Sea container environments expose packaged goods to high humidity and condensation cycles over multi-week transit. Hermetically sealed aluminum foil bags maintain component integrity regardless of container conditions.
Optical & Precision Instruments
Storage and shipment of optical components, sensors, and precision measurement equipment where humidity-induced fogging, corrosion, or dimensional changes result in calibration failure or permanent damage.
Customization
Frequently Asked Questions
What moisture sensitivity levels require sealed moisture barrier bags?
Under JEDEC J-STD-033, components classified at MSL 2 and above require sealed moisture barrier packaging with desiccant for storage and shipment. MSL 1 components are not moisture-sensitive and do not require sealed bags. Check your component manufacturer’s datasheet for the specific MSL classification.
How long can components be stored in a sealed moisture-proof bag?
When properly heat-sealed with appropriate desiccant, components can be stored for 12 months or more while maintaining moisture protection below 10% RH internally. For long-term storage beyond 12 months, reseal with fresh desiccant and a new humidity indicator card.
How do I confirm a bag seal has not been compromised?
Include a humidity indicator card (HIC) inside the sealed bag. A color change on the HIC at the point of opening indicates moisture ingress and alerts the user to inspect or reject the batch before use — standard practice in incoming goods inspection for electronics manufacturing.
Does this bag provide ESD protection?
This bag is optimized for moisture barrier performance. For simultaneous ESD shielding and moisture protection with Faraday cage performance, see our Aluminum Foil Heat-seal Bag with tested surface resistance and ANSI/ESD S20.20 compliance.
Are custom sizes available?
Yes. All dimensions are manufactured to order, and low MOQ batches are welcome. Contact us for specifications and a quote within 24 hours.
Related Products
Suitable for distributors and manufacturers across Vietnam, Thailand, Malaysia, Singapore, and Indonesia. Contact us to verify compliance requirements for your specific market.
| Minimum Order | Flexible — contact us with your target quantity for confirmation |
| Sample Order | Available — sample cost refunded on first bulk order |
| Custom Print | Logo, design, and color printing supported (gravure up to 8 colors) |
| Custom Size | Full dimension customization available with no tooling fee (standard construction) |
| Lead Time | Stock sizes: 3–7 days · Custom production: 10–18 working days |
| Packaging | Export carton with inner poly-bag grouping; labeling to buyer spec |
All dimensions are fully customizable. Send your target size and quantity to [email protected] — we'll confirm feasibility and pricing within 24 hours.
Product data sheets and test reports are available upon request. Email [email protected] with your product and application details.
Email [email protected] or WhatsApp +86 186 2610 0216 with your dimensions and quantity. We respond within 24 hours.
