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1. (WO2018138702) METHOD OF MANUFACTURING A FILM COMPRISING MICROFIBRILLATED CELLULOSE

Pub. No.:    WO/2018/138702    International Application No.:    PCT/IB2018/050551
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Wed Jan 31 00:59:59 CET 2018
IPC: D21H 11/18
B32B 29/00
D21H 23/50
D21H 25/14
D21H 27/30
D21H 21/14
Applicants: STORA ENSO OYJ
Inventors: AXRUP, Lars
KNÖÖS, Isabel
AULIN, Christian
HILLERGREN, Magnus
LINDSTRÖM, Tom
STRÖM, Göran
Title: METHOD OF MANUFACTURING A FILM COMPRISING MICROFIBRILLATED CELLULOSE
Abstract:
The method of the invention relates to a method of manufacturing a fibrous, oxygen barrier film by casting a suspension comprising microfibrillated cellulose onto a non-porous substrate in a number of subsequent steps with intermediate drying. The invention enables an efficient method to manufacture an MFC film by casting technology without the problems of cracks or voids formed in the film. By applying the MFC in several layers, with in-between drying, the distance the water has to diffuse through is shorter, whereby the evaporation is more efficient and the film properties are not negatively affected by the drying.