Hollow fiber membranes manufactured by Mitsubishi Rayon are made from extremely thin, straw-shaped hollow fibers, which are formed from countless ultra-fine, slit-shaped pores in the sides of the fibers. The Company's hollow fiber membranes are made from polyethylene. Strong yet flexible, they are safe and clean, containing absolutely no solvents or plasticizers.

The hollow fiber membrane is used in medical and industrial areas, including water supply and water treatment facilities, the condensate filter equipment of power plant turbines, and ultra filtrationn hand-washing units for hospital operation rooms.