公开(公告)号：WO2022259134A1

公开(公告)日：2022-12-15

申请号：PCT/IB2022/055278

申请日：2022-06-07

Applicant: STORA ENSO OYJ

Inventor： NYFLÖTT, Åsa ,  BONNERUP, Chris ,  KNÖÖS, Isabel ,  KARLSSON, Anders

IPC: C09D105/14 ,  B32B29/00 ,  C08J5/18 ,  C08L5/14 ,  D21H19/00

Abstract: The present invention relates to an aqueous barrier coating composition comprising: 20-80 % by weight of a dissolved first polysaccharide having a first degree of polymerization (DP1) of at least 150, based on the total solids content of the aqueous barrier coating composition; and 20-80 % by weight of a dissolved second polysaccharide having a second degree of polymerization (DP2) of 100 or less, based on the total solids content of the aqueous barrier coating composition; wherein the ratio of DP1:DP2 is at least 10:1; and wherein the aqueous barrier coating composition has a total solids content in the range of 10-90 % by weight.

公开(公告)号：WO2020104900A1

公开(公告)日：2020-05-28

申请号：PCT/IB2019/059775

申请日：2019-11-14

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, 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.

公开(公告)号：WO2023089466A1

公开(公告)日：2023-05-25

申请号：PCT/IB2022/060918

申请日：2022-11-14

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, Isabel

IPC: D21H11/18 ,  C08J5/18 ,  C08L1/02 ,  C09D101/00 ,  B32B27/10 ,  C08L71/02 ,  D21C9/00

Abstract: The present invention relates to microfibrillated cellulose (MFC) film, said film comprising: MFC at a concentration in the range of 50-98 wt%, and a low molecular weight polyethylene glycol (LMW-PEG) having a molecular weight in the range of 300-500 g/mol at a concentration in the range of 2-8 wt%, based on the total dry weight of the MFC film. The invention further relates to a multilayer material comprising the MFC film.

公开(公告)号：WO2021130668A1

公开(公告)日：2021-07-01

申请号：PCT/IB2020/062324

申请日：2020-12-22

Applicant: STORA ENSO OYJ

Inventor： NYLÉN, Otto ,  HEISKANEN, Isto ,  KNÖÖS, Isabel

IPC: C08J5/18 ,  B32B7/06 ,  C09D5/20 ,  C09D101/02 ,  C09D191/00 ,  D21H11/18 ,  D21H23/28

Abstract: A method for making a cellulose film comprising microfibrillated cellulose (MFC) is provided, said method comprising the step of: applying an aqueous emulsion of one or more vegetable oils to a surface of a casting substrate. Improved release of the MFC film can thus be achieved.

公开(公告)号：WO2020075056A1

公开(公告)日：2020-04-16

申请号：PCT/IB2019/058546

申请日：2019-10-08

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, Isabel

IPC: C08J5/18 ,  B32B27/10 ,  B65D65/40 ,  C08L1/08 ,  D21H11/18 ,  D21H17/67 ,  B29D7/01 ,  B32B29/00

Abstract: The present invention relates to a method for manufacturing at least one fibrous barrier layer wherein the method comprises the steps of: providing a suspension comprising intermixed microfibrillated cellulose (MFC) and microfibrillated dialdehyde cellulose (DA-MFC); adding at least one inorganic pigment to said suspension and intermix to form a mixture; applying said mixture to a substrate to form a wet fibrous web; and drying said wet web on said substrate to form a fibrous barrier layer. It also relates to a fibrous barrier layer comprising microfibrillated dialdehyde cellulose, microfibrillated cellulose and at least one inorganic pigment.

公开(公告)号：WO2020058803A1

公开(公告)日：2020-03-26

申请号：PCT/IB2019/057603

申请日：2019-09-10

Applicant: STORA ENSO OYJ

Inventor： LAND HENSDAL, Cecilia ,  KNÖÖS, Isabel

IPC: C08B15/02 ,  C08B15/10 ,  C08J5/18 ,  C08L1/02 ,  C09D101/00 ,  D21H11/18 ,  B82Y30/00

Abstract: The present invention relates to a method for manufacturing at least one layer of a film characterized by that the method comprises the steps of: providing a first suspension comprising microfibrillated cellulose, providing a second suspension comprising microfibrillated dialdehyde cellulose, mixing the first suspension with the second suspension to form a mixture, in which mixture less than 5% of the anhydroglucose units (AGU) of the total cellulose present therein comprise a dialdehyde, applying said mixture to a substrate to form a fibrous web, and drying said web to form at least one layer of said film. The present invention further relates to a film comprising said at least one layer of film.

公开(公告)号：WO2020261170A1

公开(公告)日：2020-12-30

申请号：PCT/IB2020/056014

申请日：2020-06-25

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, Isabel ,  NYFLÖTT, Åsa ,  BONNERUP, Chris

IPC: D21H11/18 ,  D21H19/02 ,  D21H19/08 ,  D21H19/34 ,  D21H19/44 ,  D21H19/52 ,  D21H19/56 ,  D21H19/58 ,  D21H19/64 ,  D21H19/82 ,  D21H21/10

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 metallized; and a polymer dispersion coating layer disposed on at least one surface of the MFC layer. The present invention further relates to a paper or paperboard based packaging material, containers and carton blanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.

公开(公告)号：WO2019123405A1

公开(公告)日：2019-06-27

申请号：PCT/IB2018/060496

申请日：2018-12-21

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, Isabel

IPC: B32B23/02 ,  B32B23/08 ,  B32B27/06 ,  B32B27/20 ,  B32B27/30 ,  B65D65/40 ,  D21H11/18 ,  B32B5/02 ,  B32B27/10 ,  B32B27/32

Abstract: The invention relates to a multilayer, oxygen barrier film comprising: - a first layer (1) comprising at least 80 % by weight of microfibrillated cellulose (MFC) as calculated on the total solid content of said layer, - a second layer (2) comprising a polymer and optionally pigments, and - a third layer (3) comprising at least 40 %, preferably at least 50 %, by weight of chemically modified microfibrillated cellulose as calculated on the total solid content of said layer. The multilayer film of the invention has shown to provide excellent and stable gas barrier properties, especially oxygen barrier properties, also at high humidity as well as good strength properties.

公开(公告)号：WO2019073370A1

公开(公告)日：2019-04-18

申请号：PCT/IB2018/057800

申请日：2018-10-09

Applicant: STORA ENSO OYJ

Inventor： KNÖÖS, 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：WO2018138702A1

公开(公告)日：2018-08-02

申请号：PCT/IB2018/050551

申请日：2018-01-30

Applicant: STORA ENSO OYJ

Inventor： AXRUP, Lars ,  KNÖÖS, Isabel ,  AULIN, Christian ,  HILLERGREN, Magnus ,  LINDSTRÖM, Tom

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

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.