"BiNFi-s" is a series of ultra-fine fiber which is produced by SUGINO's ultra-high pressure water jet technology. It made from biomass like cellulose, chitin and chitosan. The size is about 10-20nm width and several µm length in average. In general, cellulose nanofibers/nano-cellulose, chitin nanofibers, and the like are used as raw materials. Applied development and research has been actively conducted in Japan and overseas in recent years. It has low linear thermal expansion, effect elasticity, transparency, biocompatibility, antibacterial features, improvement of physiological functions, high strength, high aspect ratio, high specific surface area, high viscosity, high shape retention, and high hydrophilicity, and is expected to be used in a variety of fields.