Lightweight protection. Stable ESD performance.
For: Semiconductors · PCB & PCBA · Precision Instruments · Cleanroom
PROTECTION BUILT INTO THE MATERIAL
Yufa ESD sponge — black, open-cell polyurethane foam supplied in 2 m × 1 m sheets.
Yufa ESD sponge is a lightweight, open-cell polyurethane foam with permanent anti-static performance. Unlike conventional anti-static foams that depend on a surface coating or a post-soaking treatment, the anti-static property is built into the material itself — it does not wear off, wash out or diminish with time in use.
Use it as a cushioning insert, a tray or box liner, an interleaving layer, or a die-cut protective layer for ESD-sensitive components. Surface resistivity stays stable at 10⁴ – 10⁹ Ω/sq, and static decays in under 2 seconds.
Key Features at a Glance
|
Feature |
What it means for you |
|
Permanent anti-static |
Built into the material — no coating, no soaking, no loss over time. |
|
Stable surface resistivity |
10⁴ – 10⁹ Ω/sq, tested at 23 ± 2 °C / 50 ± 5 % RH. |
|
Fast static decay |
Under 2.0 s (1,000 V → 100 V), MIL-STD-3010 Method 4046. |
|
Lightweight cushioning |
22 kg/m³ open-cell foam — protects without adding weight. |
|
Standard sheet |
2 m × 1 m × 40 mm; size and density customised on request. |
|
Made to fit your design |
Die-cut and formed shapes from your drawing; supplied in black. |
More Than Soft Cushioning
ESD sponge combines cushioning and ESD protection in one material, so you do not need a separate anti-static wrap inside the box.
• Lightweight open-cell polyurethane foam
• Cushions components during handling and transport
• Designed for electronics and precision products
ESD Performance Built In — Not a Temporary Treatment
• Anti-static properties are integrated into the material
• No temporary surface coating or soaking treatment
• Permanent performance that does not diminish over time
Cut edge: the anti-static property runs through the whole foam, not just the surface.
Anti-static performance does not diminish with time in use.
Documented Electrical Performance
Surface resistivity: 10⁴ – 10⁹ Ω/sq
• Stable surface resistivity range
• Tested at 23 ± 2 °C and 50 ± 5 % RH
• Suitable for ESD-sensitive packaging applications
Static decay: under 2.0 seconds
• Decay from 1,000 V to 100 V
• MIL-STD-3010 Method 4046
• Test condition: 12 % ± 3 % RH at 23 ± 3 °C
Surface resistivity verified in-house — data controlled by the Yufa Quality Department.
22 kg/m³ Standard Density — Lightweight, Practical, Protective
• Open-cell polyurethane construction
• Standard sheet: 2 m × 1 m
• Standard thickness: 40 mm
• Dimensions and density can be customised (MOQ applies)
Made for Your Packaging Design
• Supplied in black as standard
• Dimensions and density can be customised
• Custom cutting and forming available; MOQ applies
Custom die-cut ESD sponge inserts produced to a customer drawing.
For Sensitive Components
• Semiconductors, ICs and PCB assemblies
• Precision instruments and optoelectronic products
• Cushioning inserts and transport packaging
• Tray, box and drawer liners; cleanroom workbench liners
Illustrative custom configurations — ESD sponge tray inserts for PCB assemblies.
Thin-Sheet Option — Liners, Interleaving and Die-Cut Layers
• Customer-specified sheet size: 2 m × 1 m
• Common uses include tray and box liners
• Also suited to interleaving, surface protection and die-cut layers
Thin ESD sponge sheet used as a tray liner and surface-protection layer (illustration).
Documented Quality
• Technical data controlled by the Yufa Quality Department
• ASTM and MIL test methods referenced
• ISO 9001:2015 quality management system
Technical Specifications
|
Property |
Test method |
Condition |
Value |
Unit |
|
Density |
ASTM D3574 |
— |
22 |
kg/m³ |
|
Standard length |
Internal method |
— |
2 |
m |
|
Standard width |
Internal method |
— |
1 |
m |
|
Standard thickness |
Internal method |
— |
40 |
mm |
|
Colour |
Visual inspection |
— |
Black |
— |
|
Cell structure |
Visual inspection |
— |
Open-cell |
— |
|
Surface resistivity |
Internal method RT-1000 |
23 ± 2 °C, 50 ± 5 % RH |
1.0E4 – 1.0E9 |
Ω/sq |
|
Static decay time |
MIL-STD-3010 Method 4046 |
1,000 V → 100 V, 12 ± 3 % RH |
< 2.0 |
s |
1. Values are typical and for reference only; they are not guaranteed specification limits.
2. Dimensions and density can be customised on request — MOQ applies.
3. Storage: dry, ventilated place at 5–35 °C, away from direct sunlight. Use within 12 months from the date of delivery.
Send Us Your Requirements
Tell us your dimensions, density and packaging requirements — we will recommend the right specification and send a quotation.
• Sheet size (L × W) and thickness
• Density
• Shape — die-cut or formed (drawing in DXF / STEP / PDF welcome)
• Application and required quantity
BLACK · CUSTOM SIZE · CUSTOM DENSITY
Yufa Polymer Products Co., Ltd.
info@yufapolymer.com
www.yufapolymer.com
SHENZHEN, CHINA
