Mitsubishi Rayon Engineering - MRE - Hollow-Fiber Membrane Filters "Sterapore"

* Recipient of prize at 60th annual meeting of the Society of Fiber Science and Technology, Japan in 2004

Mitsubishi Rayon was the first company in the world to commercialize a multi-layered composite hollow-fiber membrane, a membrane with a completely new structure, and one which has superior permeability to gases. This membrane features an ultra-thin non-porous membrane sandwiched between two porous membranes.

	Thanks to its non-multi-porous structure, the membrane prevents leakage of liquid at the non-pressurized side.

	As the non-porous membrane is ultra-thin, it has superior performance in letting through gases.

	As the non-porous membrane is sandwiched between two polyethylene porous membranes, it displays excellent mechanical strength.

	It is possible to remove dissolved oxygen in water to below 1µg/L.

	Steady running perfomance is obtainable.

	As the membrane is of the low-elution type, it is applicable for ultra-pure water or waste suitable for food processing, as required.

	It can be easily fitted inside compact modules.

Permeation of the gases through the non-porous membrane is driven by the differential concentration of each gas across the membrane. Dissolved gases are thus removed from the water by passing them through the ultrathin non-porous membrane. Differential gas concentrations can be effectively created by placing one side of the membrane under a vacuum. The non-porous membrane allows only gas molecules to pass through by means of a diffusion mechanism.


Degassing system	Example of treatment flow

	Because of the extremely large membrane area, operation is very efficient. Additionally, the module structure is very compact.

	A number of modules can be fitted in line, enabling successive treatment.

Water system	Usage	Function	Effect
	Ultra-pure water for cleaning LSI chips and LCDs	Removal of dissolved oxygen	Prevention of formation of oxide layer
		Removal of dissolved carbon dioxide	Load reduction for polisher
		Carbon dioxide dissolution	Adjustment of electric conductivity
	Feed water, air-conditioning water	Removal of dissolved oxygen	Prevention of pipe corrosion
	Water used in food processing	Removal of dissolved air	Inprovement of volume uniformity in container filling process, prevention of deterioration caused by oxidization of components
	Water used in food processing	Removal of minute amounts of volatile organic matter	Enhancement of safety of food and beverage products
	Water for ultrasonic cleaning	Removal of dissolved oxygen	Prevention of rust in metal components
	Water for ultrasonic cleaning	Removal of dissolved air	Enhancement and homogenization of sonic cleansing action
	Water used in analyzing apparatus	Defoaming	Improvement of accuracy of microanalysis
Solvents system	Solution for semiconductor production, Ink	Removal of microbubbles Removal of dissolved oxygan	Prevention of pattern defects Improvement of print accuracy

Easy to use by all-in-one type module

Excangeable and low-cost

flux 2-3L/min	···········	MHF304KMD/EED
flux 8-12L/min	···········	MHF304KMD/EED(3cartrdeges serially)

Chemical resistance is excellent	···········	MHF0498P
The module has a superior treatment capability	···········	MHF398PFDE

Degassing for Japanese sake

Sample : Japanese sake

Objective : oxgen degassing for keeping quality

module : MHF3504

Photograph : Dewazakura Sake Brewery Co.,Ltd