Title:
METHOD FOR PREPARING A MEMBRANE FROM FIBRIL CELLULOSE AND FIBRIL CELLULOSE MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2013/171373
Kind Code:
A3
Abstract:
Method for preparing a membrane from fibril cellulose comprises - supplying fibril cellulose dispersion on a filter layer, - draining liquid from a fibril cellulose dispersion by the effect of reduced pressure through the filter layer that is impermeable to fibrils of the fibril cellulose but permeable to the liquid to form a membrane sheet on the filter fabric, - applying heat on the opposite side of the membrane sheet to the membrane sheet while continuing draining of the liquid through the filter layer by pressure difference over the filter layer, and - removing the membrane sheet from the filter layer as a freestanding membrane.
Inventors:
BESSONOFF MARKO (FI)
PALTAKARI JOUNI (FI)
LAUKKANEN ANTTI (FI)
PALTAKARI JOUNI (FI)
LAUKKANEN ANTTI (FI)
Application Number:
PCT/FI2013/050523
Publication Date:
January 16, 2014
Filing Date:
May 14, 2013
Export Citation:
Assignee:
UPM KYMMENE CORP (FI)
International Classes:
B01D67/00; B01D39/18; B01D71/10; B01D71/82; D21F5/00; D21F5/14; D21F11/14; F26B13/16
Domestic Patent References:
| WO2011093510A1 | 2011-08-04 | |||
| WO2012056109A2 | 2012-05-03 |
Foreign References:
| DE19627891A1 | 1998-01-15 | |||
| DE102008002655A1 | 2009-12-31 | |||
| CA2782485A1 | 2011-06-09 | |||
| EP1469126A1 | 2004-10-20 |
Other References:
ANDONG LIU ET AL: "Clay Nanopaper with Tough Cellulose Nanofiber Matrix for Fire Retardancy and Gas Barrier Functions", BIOMACROMOLECULES, vol. 12, no. 3, 14 March 2011 (2011-03-14), pages 633 - 641, XP055074548, ISSN: 1525-7797, DOI: 10.1021/bm101296z
Attorney, Agent or Firm:
TAMPEREEN PATENTTITOIMISTO OY (Tampere, FI)
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