Black Carbon-Impregnated Conductive Bags for PCB Assemblies and Large ESD-Sensitive Component Packaging

These 18x24 in. black conductive bags provide heavy-duty ESD shielding for full-size motherboards, large PCB assemblies, populated rack boards, and other oversized electrostatic discharge sensitive components. Carbon-impregnated LDPE construction delivers a fully conductive bag enclosure that neutralizes and dissipates static charge across the entire film surface.

Specs: 18 x 24 in. | 4 mil | Black Carbon-Impregnated LDPE | MIL-P-82646 Rev. B | 100/Carton

Applications

Full-size ATX and E-ATX motherboard packaging; large PCB assembly and populated board protection; rack-mount card and backplane packaging; military and defense electronic assembly storage; industrial control board packaging; large embedded computing module staging.

Features

Carbon-impregnated LDPE delivers consistent conductive performance across the full bag surface — no surface coating that can abrade or delaminate. Meets MIL-P-82646 Rev. B specification for electrostatic shielding of electronic components. When heat-sealed, provides protection against electrostatic charge, chemicals, abrasion, and humidity. 4 mil heavy-duty construction resists puncture from PCB mounting hardware, connector tabs, and card edge contacts. Can be heat sealed, tied, stapled, or taped.

Material Notes

Black low-density polyethylene (LDPE) with carbon black impregnated throughout the film matrix. Conductive grade (surface resistivity <10⁴ Ω/sq) — not static dissipative. Carbon impregnation is uniform through the film cross-section, not surface-coated. Black construction provides UV protection for light-sensitive components.

Use Case Notes

The 18x24 in. flat format accommodates standard ATX motherboards (12 x 9.6 in.), E-ATX boards (up to 12 x 13 in.), and large PCB assemblies up to 16 x 22 in. with sealing headspace. For populated boards with tall capacitors or heatsinks, the flat bag can be sealed without compressing components. 100/carton quantity supports mid-volume ESD component handling operations.

Common Questions

Q: How do these differ from static shielding (metalized) bags?
A: Black conductive bags use carbon-impregnated LDPE for conductivity. They dissipate charge actively but do not provide the full Faraday cage isolation of metalized static shielding bags. For Class 0 and Class 1A ESDS devices, metalized shielding bags may be required. For most PCB assemblies, conductive bags provide adequate production and transit protection.

Q: Can these be heat sealed?
A: Yes. Carbon-impregnated LDPE heat-seals cleanly with an impulse bar sealer. Heat sealing activates the humidity and chemical barrier in addition to ESD protection.

Why Buy

Carbon-impregnated construction provides permanent, non-migratory conductivity for repeated-use PCB staging and transit packaging. MIL-P-82646 Rev. B compliance satisfies military and aerospace ESD packaging requirements. 18x24 format handles full-size and E-ATX motherboards and large electronic assemblies without excess material. 4 mil gauge withstands sharp PCB card-edge and connector hardware.