Fujifilm Improves Effect of Antibacterial Film by 100 Times

Jul 15, 2014
Masaru Yoshida, Nikkei Monozukuri

Fujifilm Corp developed an antimicrobial coating technology that realizes an about 100 times higher antibacterial performance than conventional technologies using silver (Ag)-based antibacterial agents.

The company expects that the new technology, "Hydro AG," will be used as an antibacterial LCD protection film for devices equipped with touch panels at medical institutions, public facilities, educational institutions, etc.

Hydro AG is a technology to apply a superhydrophilic plastic containing ceramic fine particles (Ag-based antibacterial agent) that have a function to gradually discharge Ag ions. It was developed by combining Fujifilm's Ag-related expertise built up through the development of photographic films and high-precision coating technology as well as Toyama Chemical Co Ltd's evaluation technique for antibacterial performance. Toyama Chemical is a Tokyo-based company affiliated with Fujifilm.

In general, with an antimicrobial coating technology using a Ag-based antibacterial agent, moisture in the air acts on the agent and emits Ag ions. The ions bind to the enzymes on the surfaces of germs and inactivate the germs. Therefore, the effect of preventing the increase of germs is expected to be improved by increasing the density of Ag ions on the surface of a coating film.

Hydro AG provides Ag ions by dispersing a Ag-based antibacterial agent in a superhydrophilic binder, which has a high affinity with water, and making moisture act not only on the antibacterial agent on the surface of the coating film but also on the agent inside the film. As a result, the density of Ag ions increases on the surface of the coating film, realizing a high antibacterial performance as well as a long-lasting effect.

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