公开(公告)号：CA3078582A1

公开(公告)日：2019-04-18

申请号：CA3078582

申请日：2018-10-09

Applicant: STORA ENSO OYJ

Inventor： KNOOS ISABEL

IPC: D21H11/18 ,  D21H11/20

Abstract: The present invention relates to a process for improving the strechability of films comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the oxygen barrier properties. According to the present invention, a film is formed from a suspension comprising microfibrillated cellulose having a broad size distribution.

公开(公告)号：CA3046438A1

公开(公告)日：2018-08-02

申请号：CA3046438

申请日：2018-01-30

Applicant: STORA ENSO OYJ

Inventor： AXRUP LARS ,  KNOOS ISABEL ,  STROM GORAN ,  HILLERGREN MAGNUS ,  LINDSTROM TOM ,  AULIN CHRISTIAN

IPC: D21H11/18 ,  B32B29/00 ,  D21H21/14 ,  D21H23/50 ,  D21H25/14 ,  D21H27/30

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.

公开(公告)号：CA3120542A1

公开(公告)日：2020-05-28

申请号：CA3120542

申请日：2019-11-14

Applicant: STORA ENSO OYJ

Inventor： KNOOS ISABEL

IPC: B32B5/02 ,  B32B7/12 ,  B32B27/10 ,  B32B27/12 ,  B32B27/18 ,  B32B27/30 ,  B32B27/32 ,  B32B27/36 ,  B32B29/00 ,  B32B29/06

Abstract: The present invention relates to a gas barrier film for a paper or paperboard based packaging material,said gas barrier film comprising: a microfibrillated cellulose layer (MFC layer), at least one surface of which has been grafted with a fatty acid halide; and a polymer layer disposed on the at least one surface of the MFC layer which has been grafted with a fatty acid halide. The present invention further relates to a paper or paperboard based packaging material,containersand carton blanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.