Patent · US Active

Method of manufacturing a film comprising microfibrillated cellulose

US11724284B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

Stora Enso OYJ · FI

Inventors

Lars Axrup · Fållan, SE
Isabel Knöös · Säffle, SE
Christian Aulin · Stockholm, SE
Magnus Hillergren · Solna, SE
Tom Lindstrom · Sollentuna, SE
Göran Ström · Lund, SE

Key dates

Filing date	Jan 30, 2018
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Jan 10, 2040

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H27/30
WIPO fieldSurface technology, coating
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.