As temperatures rise during the summer months, so does humidity—and while many people welcome the warmer weather, manufacturers that rely on electrostatic charging often face a seasonal challenge.

Humidity has a direct impact on how static electricity behaves. In dry conditions, static charges remain on a material's surface for longer periods of time, making it easier to generate and maintain the electrostatic forces needed for manufacturing processes. As humidity increases, however, microscopic layers of moisture form on surfaces, creating a conductive path that allows electrical charges to dissipate more quickly.

The result? More charging power may be required to achieve the same level of electrostatic attraction that worked perfectly during the winter months.

Why Humidity Matters

Electrostatic charging systems work by depositing an electrical charge onto one material, creating an attractive force that temporarily bonds it to another surface. When relative humidity climbs, water molecules in the air make it easier for those charges to leak away before the desired holding force is achieved.

This doesn't mean electrostatic charging stops working—it simply means manufacturers may need to optimize their charging system to compensate for changing environmental conditions. Factors such as charging voltage, emitter distance, web speed, and material properties all play a role in maintaining consistent performance throughout the year.

Understanding these seasonal effects allows manufacturers to maintain reliable production without sacrificing throughput or product quality.

Real-World Applications Where Electrostatic Charging Makes the Difference

Across many industries, electrostatic charging is used to temporarily hold materials together without adhesives, vacuum systems, or mechanical fixtures. The result is improved material control, greater process stability, and higher product quality.

Converting

In web handling and converting operations, electrostatic charging helps control lightweight webs as they move through high-speed production lines. By creating a temporary electrostatic bond, manufacturers can improve web stability while reducing wrinkles, shifting, and registration issues.

Common applications include:

• Edge pinning to stabilize web edges during processing 
• Film-to-film lamination
• Flexible packaging production
• Paper and foil converting
• Web handling prior to winding or slitting

Reliable electrostatic pinning helps converters maintain consistent product quality, even as environmental conditions such as humidity fluctuate.

Printing

Printing and bindery processes often rely on electrostatic charging to keep substrates firmly positioned as they move through the press. Proper material control improves print registration and helps maintain consistent production speeds.

A common application is chill roll tacking, where electrostatic charging temporarily holds freshly printed film against a chilled roller. This maximizes heat transfer, promotes faster cooling, and helps minimize wrinkles or movement before downstream processing.

Other printing applications include:

• Chill roll tacking for printed films
• Sheet and web stabilization
• Improved print registration
• Material control during high-speed printing operations

Medical Device Manufacturing

During medical device manufacturing, thin films, nonwoven materials, and flexible plastics are frequently processed which can be difficult to control mechanically. Electrostatic charging provides a clean, non-contact method for temporarily holding materials in place during manufacturing without introducing adhesives or contamination risks.

Common applications include:

• Nonwoven surgical mask manufacturing 
• Catheter tubing and protective liners
• Medical films during sealing operations
• Sterile packaging materials prior to sealing
• Diagnostic and disposable medical device assembly

By improving material positioning throughout the manufacturing process, electrostatic charging helps support consistent product quality while maintaining the cleanliness required for medical applications.

Automotive Manufacturing

Electrostatic charging is used to temporarily position lightweight materials before permanent attachment during assembly in automotive manufacturing.

Common applications include:

• Holding headliner fabrics during assembly
• Positioning foam insulation layers
• Stabilizing interior trim materials
• Aligning decorative films before bonding

Electrostatic pinning minimizes material movement, improving alignment, repeatability, and overall assembly efficiency.

Designed to Perform in Any Season

While humidity can reduce how long a static charge remains on a material, modern electrostatic charging systems are designed with these real-world manufacturing environments in mind.

The ChargeMaster VCM delivers high-voltage charging for demanding converting and industrial applications where strong, consistent electrostatic attraction is required across varying production conditions.

For applications requiring precise electrostatic pinning, the Pinner Series provides reliable charging to temporarily bond materials during assembly, converting, packaging, and manufacturing processes—helping improve product quality without introducing adhesives or mechanical restraints.

By understanding how environmental conditions affect static electricity and selecting the right charging solution, manufacturers can maintain reliable performance throughout the changing seasons.

Click here to find your local specialist to discuss the right charging system for your application!