FERENA is made by electro-spinning method.
Electro-spinning method is a process invented over 50 years ago as an early development stage in the laboratory to manufacture very fine microfibers.
All over the world people took on a venture to commercialize this new technology at the idea that an ultimate form of the aerosol filter can be produced but failed to mass-produce it in earnest.
Koken took on this challenge and succeeded in the commercialization of the technology.
・High content rate of nanofibers
・Effective texture as filter due to a random structure