Title:
CELLULOSE ACETATE SEMIPERMEABLE MEMBRANE AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2000/009247
Kind Code:
A1
Abstract:
A cellulose acetate semipermeable membrane which exhibits a high filtration velocity, has a high mechanical strength and is unsusceptible to degradation by a microorganism, characterized in that it comprises a cellulose acetate having an $g(a)-cellulose content of 99 wt.% or more, a 6 wt/vol % viscosity at 25 ± 1 °C of 20 to 220 mPa.s and an acetylation degree of 58 to 62 %. This cellulose acetate semipermeable membrane is particularly suitable for a hollow yarn membrane.
Inventors:
NAKATSUKA SHUJI (JP)
Application Number:
PCT/JP1999/002290
Publication Date:
February 24, 2000
Filing Date:
April 28, 1999
Export Citation:
Assignee:
DAICEL CHEM (JP)
NAKATSUKA SHUJI (JP)
NAKATSUKA SHUJI (JP)
International Classes:
B01D69/02; B01D69/08; B01D71/16; D01D5/24; D01F2/28; (IPC1-7): B01D71/16; B01D69/08; D01D5/24; D01F2/00
Foreign References:
| JPH08108053A | 1996-04-30 | |||
| JPH07165938A | 1995-06-27 | |||
| JPH10305220A | 1998-11-17 | |||
| JPS6043442B2 | 1985-09-28 | |||
| JPH06343842A | 1994-12-20 | |||
| JPH08108053A | 1996-04-30 |
Other References:
See also references of EP 1029584A4
Attorney, Agent or Firm:
Furuya, Kaoru (Nihonbashi-Horidomecho Chuo-ku Tokyo, JP)
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