Uline Static Shield Bag Resealable 12 in. x 9 in. Pack of 60 Bags

Uline Resealable Static Shielding Bags – 12 x 9 Inch, 3.1 mil Multi-Layer Metalized Laminate, Integral Zipper Closure, ESD Safe, Non-Sterile (MPN: S-3753)

The Uline S-3753 (also cataloged as S3753 / S-3753-CS) is an industrial-grade, heavy-duty Electrostatic Discharge (ESD) protective pouch engineered to insulate highly sensitive electronic components, printed circuit boards (PCBs), and analytical laboratory instrument modules from external electrostatic fields and triboelectric charging. Measuring 12 inches in length by 9 inches in width (internal dimensions), these 3.1 mil thick pouches are fabricated from a robust four-layer metalized laminate matrix featuring a buried aluminum core shield sandwiched between an antistatic polyester interior and a static-dissipative exterior wrap. Outfitted with an integrated, heavy-gauge resealable track zipper, these transparent bags establish an unyielding Faraday cage mechanical barrier that blocks electrical voltage spikes and environmental moisture drift without requiring heat-sealing equipment.

Technical Performance and Structural Design

• Buried Metal Shield Faraday Cage Architecture: Constructed with a multi-layer laminate containing a vapor-deposited aluminum core layer nestled between specialized polymer sheets. This structural metallurgy creates a complete Faraday cage envelope that redirects external electrostatic discharges around the perimeter rather than allowing them to penetrate inside.

• Heavy-Gauge Integral Track Zipper: Outfitted with an integrated, press-to-close track zipper strip. This mechanical closure allows for repeated, secure opening and closing cycles without degrading the ESD boundary, completely removing the process necessity of external conductive tape or heat-seal steps.

• Optically Semi-Transparent Polymeric Wall: The multi-layer construction delivers an optically translucent smoke-gray profile. This clear silhouette enables instant visual inspection of inner contents, parts numbers, and serial barcodes without opening the pouch and exposing vulnerable microchips to ambient workshop static.

• Comprehensive Mil-Spec Compliance Parameters: Rigorously evaluated to meet strict industrial ESD safety benchmarks, conforming directly to EIA-541, MIL-STD-3010 Method 4046, and ANSI/ESD S541 material safety standards for high-performance static mitigation.

Product Specifications

• Catalog Number / MPN: S-3753 (Cross-listed as S3753 / S-3753-CS)

• Manufacturer / Brand: Uline

• Volumetric Footprint Size: 12 inches Length x 9 inches Width (Internal Usable Dimensions below the zipper line)

• Material Thickness Bounds: 3.1 mil nominal wall thickness profile

• Material Composition Matrix: Multi-layer polyester (PET), vapor-deposited aluminum shield core, and static-dissipative polyethylene (PE)

• Closure Type Profile: Heavy-Duty Resealable Interlocking Zip Track

• Static Decay Lifecycle Metric: Less than 0.05 seconds from 5,000 Volts down to zero per industry testing requirements

• Standard Case Configuration: Box / Case of 500 Bags total (Frequently distributed as convenient smaller inner bundles of 100 bags)

Key Benefits and Applications

• PCB and Motherboard Long-Term Storage: The baseline protection standard for storing computer motherboards, hard drives, RAM chips, and custom laboratory instrument controller cards, shielding delicate logic gates from ambient static shock.

• Analytical Lab Instrument Component Archiving: Protects expensive diagnostic spectrometer parts, electronic sensors, and automation board replacements from field degradation while they sit in inventory closets.

• Triboelectric Charge Prevention: The smooth, chemically inert internal anti-static coating prevents friction charging when parts slide in or out, eliminating the tiny sparks that can silently fry internal microchips.

• Industrial Warehouse Dust Barriers: The tight mechanical seal blocks airborne particulate migration, moisture humidity spikes, and corrosive oxidation paths, ensuring spare hardware pieces stay in factory-ready operational condition.

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