Wavelength-Control System


The Wavelength-Control System is a new drying system that uses light (infrared light) and was developed independently by NGK. By irradiating the material with infrared radiation at specific wavelengths, it delivers low-temperature drying that was difficult to perform with conventional systems. This revolutionary system provides effective drying while reducing damage to the base material, and has attracted much attention from the industrial world.


Problems with conventional systems

  • Heat damage caused during drying

    Hot air drying causes large heat damage to films or applied materials, and cannot be used with materials that are susceptible to the effects of heat.

  • Drying inside the product

    Because a vacuum system is used to remove moisture from inside the product, this has adverse effects on productivity and cost.

  • Drying of thick film products

    Webbing and foaming occurs on the surface of thick applied materials, making uniform drying difficult.

New idea from NGK

  • PI base material ⇒ Changed to PET base material
  • Continuous drying at atmospheric pressure
  • Drying of 300μm or larger thick films

Expected benefits from the wavelength-control system (main benefits)

1. Low-temperature drying

Can dry solvents while reducing heat damage to the components or resin base material.
Ex.: Can dry moisture at 40°C.

Can now use components and materials that previously could not be used due to temperature restrictions during drying.

2. Internal drying

Can dry the remaining moisture inside the products.
Ex.: Complete drying to the ppm order is possible at atmospheric pressure.

A vacuum system is not necessary, making it possible to reduce production cost and time.

3. Drying of thick films

Prevents webbing of the surface and promotes drying on the inside of thick films, a location that cannot be dried by hot air.
Ex: Can dry thick films with a dry thickness of 300 μm. Hot air limit: 100 μm

Can increase the amounts of active components contained, shortening the production process.

In addition, benefits such as the following can also be expected.

  • Reduced drying time: Approx. 1/2 to 1/3
  • Reduced power consumption: 30 – 50% reduction
  • Reduced binder segregation: 30 – 40% reduction is possible.
  • All coparisons are with hot air.

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