Description

When you handle CMOS, MOS, or other ultra‑sensitive electronics, standard anti‑static bags are not enough. You need a static shielding bag – one that blocks external electrostatic fields while preventing internal charge generation. ZXCOOL’s grey static shielding zipper bags deliver exactly that.

These 8″ × 16″ bags feature a buried metal layer (Faraday cage construction) that meets the electrical requirements of MIL‑PRF‑81705D Type III Class I and EIA Std. 541. The seal top zipper closure allows repeated access without tools, while the semi‑transparent grey film lets you identify contents at a glance.

✅ Zipper resealable – no heat sealer needed for daily use
✅ Heat sealable – optional permanent seal for long‑term storage
✅ Amine/amide‑free interior – will not corrode polycarbonate surfaces
✅ 3/8″ side seals – enhanced integrity during storage & shipping
✅ Custom sizes & printed warnings available for wholesale orders

Why Choose ZXCOOL Static Shielding Zipper Bags?

🔹 Superior Quality – Buried Metal Construction for Double Protection

Unlike pink anti‑static bags (which only dissipate surface charge), our grey bags have a buried metal layer embedded between polyethylene films. This creates a Faraday cage that:

• Blocks external electrostatic fields from reaching the contents

• Prevents triboelectric charge generation on the bag surface

• Provides humidity‑independent protection – performance does not degrade in dry or humid environments

The interior layer is amine‑free and amide‑free, so it will not corrode polycarbonate surfaces (e.g., CD/DVD polycarbonate, certain PCB substrates) and produces no outgassing – critical for cleanroom and long‑term storage.

🔹 Seal Top Zipper Closure – Reusable & Convenient

The bag features a press‑to‑close zipper on the top edge (seal top closure). Benefits for B2B users:

• No extra equipment – open and reseal by hand, perfect for assembly lines and repair shops

• High sealing performance – when properly closed, it provides dust and moisture resistance

• Reusable – hundreds of open/close cycles without losing ESD properties

• Can also be heat sealed – for a permanent, tamper‑evident seal (use an impulse sealer above the zipper)

Whether you need daily access or one‑time shipment, this bag adapts to your workflow.

🔹 Meets Industry Standards – MIL‑PRF‑81705D & EIA‑541

These bags are engineered to meet the electrical and physical requirements of:

Not QPL approved but fully compliant with the performance specifications – ideal for industrial and commercial use.

🔹 Semi‑Transparent Grey Material – Easy Identification

The grey semi‑transparent film strikes the perfect balance:

• See contents – quickly identify which PCB, hard drive, or component is inside without opening

• Reduces handling – less chance of ESD exposure from frequent opening

• Professional appearance – grey color is widely recognized in electronics manufacturing as “static shielding”

🔹 3/8″ Side Seals – Built for Integrity

Wide side seals (3/8 inch / 9.5 mm) ensure:

• No seam splitting during rough handling or vacuum sealing

• Extra mechanical strength for heavy components (up to several pounds)

• Consistent performance across thousands of bags in a roll or box

Technical Specifications

Applications – For Wholesale & Industrial Users

Customization – For Wholesale Buyers

ZXCOOL offers full customization on static shielding zipper bags:

• Any size – from 4×6″ up to 24×36″

• Thickness variations – for heavier or more delicate items

• Printed ESD warnings – “CAUTION – ESD SENSITIVE” or your logo (static‑safe ink)

• Clear zipper bags – transparent version (less grey) available on request

• Gusseted static shielding bags – for bulky items

• Roll format – for automated packaging lines

📦 MOQ for stock size (8×16″): 100 pieces (zipper bags)
📦 MOQ for custom dimensions: 500 pieces
📦 MOQ for custom printing: 5,000 pieces (no tooling fee for simple logos)

➡️ Request a wholesale quote – specify size, quantity, and any printing requirements.

FAQ – Static Shielding Zipper Bags

1. What is the difference between a static shielding bag and an anti‑static bag?
An anti‑static bag (pink or clear) only prevents static charge buildup on its surface. A static shielding bag (grey/silver with metal layer) also blocks external electrostatic fields – like a Faraday cage. Use shielding bags for shipping or storing items that could be damaged by external static fields (e.g., bare hard drives, CMOS chips).

2. Can these bags be heat sealed?
Yes. The zipper is on the top edge; you can heat seal above the zipper (closer to the opening) for a permanent closure. If you want to reuse later, just use the zipper without heat sealing.

3. Are they MIL‑PRF‑81705D certified?
They meet the electrical and physical requirements of MIL‑PRF‑81705D Type III Class I, but they are not QPL (Qualified Products List) approved. For most commercial and industrial applications, this is fully acceptable. If you require QPL certification, please contact us – we can source certified bags on request.

4. Will the interior corrode polycarbonate?
No. The interior is formulated without amines or amides, making it safe for polycarbonate surfaces (e.g., CD/DVD, certain electronic housings). No outgassing means no film or fogging on sensitive optics.

5. Are these bags humidity‑dependent?
No. Unlike some anti‑static coatings that lose effectiveness in low humidity, the buried metal layer performs consistently from 0% to 90% relative humidity.

6. What does “3/8” side seal” mean?
The side seams (left and right edges) are 3/8 inch wide – much wider than standard bags (usually 1/8″). This provides extra strength and prevents splitting when the bag is filled with heavy or sharp‑edged components.

7. Can I get samples before placing a bulk order?
Yes. Free samples of stock size (8×16″) are available upon request. Please contact our sales team with your shipping address.

Why Buy Static Shielding ZipLock Bags from ZXCOOL?

• Factory direct – no middleman, competitive wholesale pricing

• True Faraday cage construction – not just coated film

• Dual closure – zipper for daily use, heat sealable for permanent storage

• Cleanroom compatible – amine/amide‑free, no outgassing

• Low MOQ for custom – we support small and medium electronics manufacturers