Hollow fiber

Details Hollow fiber Hollow fiber

B - Operations, Transporting

01

D

18/15

B01D 69/08 (2006.01) B01D 67/00 (2006.01) B01D 71/26 (2006.01) D01D 5/24 (2006.01) D01F 6/04 (2006.01)

Patent

CA 1280564

HOLLOW FIBER ABSTRACT OF THE INVENTION A hollow fiber suitable for ultrafiltration formed from a microporous polyolefinic composition comprising from 8 to 93 volume percent polyolefin, from 7 to 92 volume percent of filler and from 0 to 10 volume percent of a plasticizer for the polyolefin to provide hollow fiber walls having pores at least 70 percent of which have a diameter of 0.3 micron or less. The microporous hollow fiber is produced by mixing from about 5-25 weight percent of a high density polyolefin, from about 30-70 weight percent of an inert filler and about 20-60 weight percent of a plasticizer for the polyolefin to form a substantially homogeneous composition. The composition is then melt extruded through a conventional nozzle to produce the hollow fiber. The formed hollow fibers are then subjected to an extraction procedure to extract substantially all of the plasticizer from the fiber.

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