Electrostatic Control by Humidification, Humidification and Humidity Conditioning/ Humidification System いけうち空調事業部トップ

About Humidifiers
Non-wetting Mist,
"Dry Fog"
HOME>Humidification System TOP>Electrostatic Control by Humidification

Effects of Preventing Electrostatic:
Electrostatic Control by Humidification and Humidity Conditioning

Electrostatic Control
by Humidification
Humidity Conditioning
Energy Saving Effect
Water Purification
Performance
Application
by Industry
Humidification Q&A
System Lineup
Inquiry




1. Conditions generating electrostatic

2. Why can electrostatic related problems be prevented under high humidity?

3. Correlation between relative humidity and static-charge voltage

4. Troubles by electrostatic and effects of installation of Dry Fog humidification system

1. Conditions generating electrostatic

For example, when two films are lapped over (placed in contact), rubbed with each other (pressurized) and peeled off (separated), electrostatic is generated.

The stronger contact and pressure are, and the faster peeling speed is, the larger magnitude of electrostatic is generated.

Effects of Preventing Electrostatic: Electrostatic Control by Humidification and Humidity Conditioning

Top

2. Why can electrostatic related problems be prevented under high humidity?

- When humidity increases (when moisture in the air increases), moisture adsorbed on a material surface increases.

- Electric conductivity on the surface rises, and then transfer speed of electrons there becomes faster.

Moisture on the surface of a material helps the generated electrostatic to be quickly dispersed and released into the atmosphere so that static potential decreases.
It is possible to prevent electrostatic from arising!

Top

3. Correlation between relative humidity and static-charge voltage

Higher humidity makes static potential lower, and electrostatic discharge comes to less arise.


Top

4. Troubles by electrostatic and effects of installation of Dry Fog humidification system

The Dry Fog humidification system prevents troubles derived from electrostatic in various industries.

Industry Purpose Eliminated Problems and Effects
Printing Safety Measures
(Gravure Printing)
Relief from the risk of ignition. Printing speed increased by 10%. Ignition causes line-down in minimum 2 days further leading to delivery delay.
Relief from the task of maintenance of electrostatic removal apparatus with cost saving of JPY 1 million a year.
 Investment in the humidification system enabling ESD control could be paid-back in 2 years.
Productivity Improvement
(Offset Printing)
Paper jam. Machine speed increased by 20%.
Disordered print stack at outlet. Productivity increased by 10%.
 Investment paid-back in 1.5 years with these improved productivity and reduction of overtime pay.
Quality Improvement
(Gravure and Screen Printing)
Quality stabilized after elimination of such problems as whiskers, dust adhesion to film and sheet. Reduced leadtime to activate the sales activity.
 Investment paid-back in 1.5 years.
Semiconductors and LCDs Prevention of ESD destruction and particle adhesion
ESD destruction of IC chip in testing process increased in accordance with advanced integration. Failure rate drastically decreased after installation of Dry Fog humidification.
Circuit destruction caused by particle adhesion in assembly process. Failure rate drastically decreased.
Failures derived from particle adhesion in LCD panel assembly process.
 Investment in the humidification system enabling ESD control could be paid-back in 1 year.
Plastics Safety Measures
Relief from the risk of ignition in such processes as foaming, cutting after casting, film processing, printing. Ignition causes line-down in minimum 2 days further leading to delivery delay.
Relief from the risk of ignition in the process where solvent like adhesive is applied. The coating machine speeded up by over 10%.
 Investment paid-back in 2 years.
Chemical Safety Measures
Relief from the risk of ignition in the process of ink and paint preparation.
Relief from the risk of ignition around the activation kiln and the mixer.
Relief from the risk of ignition in the process of pigment and paint filling.
 Ignition by electrostatic causes fatal damage and loss of social credibility.
Painting Productivity Improvement
Elimination of dust adhesion in coating process improved the productivity by 10%.
 Investment paid-back in 2 years with the improved productivity.
Quality Improvement
Painting quality improved by 20% reduction of dust adhesion related failures.
 Investment paid-back in 2 years.
Textile Productivity Improvement
Productivity improved by elimination of thread breakage

Top



©2002, H.Ikeuchi & Co., Ltd. All Rights Reserved.