Low Humidity Static Problems in Packaging & Storage | ProShieldESD
Why Static Problems Increase in Low Humidity (and How ProShieldESD Eliminates the Risk Across Packaging & Storage)
Introduction
Every winter — and in every climate-controlled warehouse — static problems increase sharply. Plastics, foams, trays, cardboard and cases accumulate charge far more easily in dry conditions.
But most teams overlook the real root cause: low humidity dramatically increases static generation, while many ‘ESD-safe’ materials lose performance at the same time.
This article explains:
- Why static rises in dry environments
- Where traditional packaging and storage materials fail
- Why ProShieldESD remains stable, regardless of humidity
Why Low Humidity Increases Static Build-Up
Low humidity removes the natural moisture film that normally helps dissipate surface charges.
When RH drops below ~30%:
- Surfaces become stronger insulators
- Tribocharging increases
- Charges stay on materials much longer
- Packaging becomes a key static generator – Click to know more
This is why ESD risks spike in winter, climate-controlled warehouses, cold storage, cleanrooms, and defence facilities.
Where Traditional ESD Materials Fail in Low Humidity
Many ‘ESD-safe’ materials rely on carbon black, carbon fibres, additive coatings, or moisture-dependent compounds.
When humidity drops:
- Resistivity increases
- Charge decay slows
- Surface performance becomes uneven
- Edges and corners become more resistive
This leads to discharge events, dust attraction, inconsistent ESD readings, and increased risk in defence and electronics handling. For more details click below:
Defence
Electronics
Real-World Failure Examples
- EVA foams accumulate thousands of volts — For more details, visit the page here.
- Plastic bins show inconsistent behaviour at low RH — For more details, visit the page here.
- Treated cardboard becomes resistive again — For more details, visit the page here.
- Defence UXO storage sees winter static spikes — defence applications
- EV battery packaging becomes highly charged in dry warehouses — automotive EV applications
How ProShieldESD Eliminates Humidity Issues
ProShieldESD uses a conductive polymer system that does not rely on moisture. It remains stable at 15–20% RH, during winter, in cold storage, and in aerospace conditions.
- Consistent surface resistivity
- No weak edges or hotspots
- Stability across plastics, foams, cardboard, metals, trays and housings.
Testing with sparktrap® EPA SafeAssure® at Productronica 2025 confirmed humidity-independent results.
Conclusion
Low humidity is one of the biggest drivers of static issues. Traditional ESD materials struggle when moisture drops.
ProShieldESD delivers stable, humidity-independent performance across all packaging and handling materials.