[CNT] Preventing static charge in bill counters

At the bank, you can find a machine that counts bills. Called the "bill counter,"

this machine is used widely in places where bills and gift certificates are handled as it is faster and more accurate than humans.

A bill counter consists of an inlet for inserting bills, a control unit for the counting, and an outlet for the outcoming bills.

When you look at the outlet, two wings are spinning quickly as they separate the bills into single sheets.

If static electricity is generated at this time, the accuracy of the count will be lower because several bills will overlap with one another.

For this reason, carbon nanotubes are used to prevent static electricity.

The unit can become antistatic by simply combining a small amount of carbon nanotubes into the materials.

Carbon nanotubes (CNT) are tubular carbon allotropes that have a diameter of nanometers (nm), and are often used in combination with other materials.

CNT can be made into composite materials with properties such as thermal and electrical conductivity.

It is widely used for electroconductive materials that need to prevent static electricity and block electromagnetic waves,

plastics for electrostatic painting of automobiles, and conductive materials for lithium-ion batteries.

* Composite materials: materials made of combining different types of materials such as metal, ceramics, and chemical materials as necessary