Title:
一体型の非対称ポリオレフィン膜の製造方法
Document Type and Number:
Japanese Patent JP4095773
Kind Code:
B2
Abstract:
Process for producing an integrally asymmetrical hydrophobic polyolefinic membrane with a sponge-like, open-pored, microporous support structure and a separation layer with a denser structure compared to the support structure, via a thermally induced liquid-liquid phase separation process. A solution of at least one polyolefin in a solvent system consisting of a compound A and a compound B is extruded to form a shaped object. Compound A is a weak solvent and compound B a non-solvent for the polymer. After leaving the die, the shaped object is cooled using a solid or liquid cooling medium that does not dissolve or react chemically with the polymer at temperatures up to the die temperature, until the phase separation and solidification of the high-polymer-content phase take place.
Inventors:
Erich Kessler
Thomas Batzel
Fleet Belt Vex
Frank Wiese
Thomas Batzel
Fleet Belt Vex
Frank Wiese
Application Number:
JP2000594563A
Publication Date:
June 04, 2008
Filing Date:
January 19, 2000
Export Citation:
Assignee:
Membrana GmbH
International Classes:
B01D69/12; B01D53/22; B01D71/26; B01D67/00; B01D69/02; B01D69/08; C08J9/28
Domestic Patent References:
| JP58164622A | ||||
| JP3502661A | ||||
| JP60052612A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel