公开(公告)号：CA3190646A1

公开(公告)日：2022-03-10

申请号：CA3190646

申请日：2021-08-31

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  KAUPPI ANNA ,  KANKKUNEN JUKKA ,  KORVENNIEMI JUHA

IPC: D21H25/04 ,  B32B29/00 ,  D21H11/18 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer machine glazed paper comprising highly refined cellulose fibers, the method comprising the steps of: forming a first wet web by applying at least one first pulp suspension comprising highly refined cellulose fibers on a first wire; partially dewatering the first wet web to obtain a first partially dewatered web; forming a second wet web by applying at least one second pulp suspension comprising highly refined cellulose fibers on a second wire; partially dewatering the second wet web to obtain a second partially dewatered web; joining the first and second partially dewatered web to obtain a multilayer web; optional dewatering the multilayer web in a dewatering unit, and glazing the multilayer web in at least one glazing unit to obtain a multilayer machine glazed paper comprising highly refined cellulose fibers. The invention also relates to a multiply MG paper produced according to the method.

公开(公告)号：SE2051029A1

公开(公告)日：2022-03-02

申请号：SE2051029

申请日：2020-09-01

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KORVENNIEMI JUHA ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ ,  LYYTIKÄINEN KATJA

IPC: D21H11/18 ,  B32B29/02 ,  D21F11/08 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising microfibrillated cellulose (MFC) in a paper-making machine, the method comprising the steps of:a) forming a bottom web layer by applying a first pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on a bottom web wire;b) forming or applying an intermediate web layer formed from a second pulp suspension comprising at least 50% by dry weight of MFC having an SR value in the range of 80-100 on the bottom web layer;c) applying a top web layer formed from a third pulp suspension comprising at least 50% by dry weight of cellulose based fibrous material having an SR (Schopper-Riegler) value in the range of 18-75 on the intermediate web layer to form a multilayer web; andd) dewatering, and optionally drying, the formed multilayer web to obtain a multilayer film comprising MFC.

公开(公告)号：PL2941442T3

公开(公告)日：2018-01-31

申请号：PL13870221

申请日：2013-12-30

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN ISTO ,  KASTINEN HENRI ,  KAUPPI ANNA ,  KANKKUNEN JUKKA ,  AXRUP LARS ,  LAND HENSDAL CECILIA ,  SAXELL HEIDI ,  BACKFOLK KAJ

IPC: C08B15/08 ,  C08L1/04 ,  D21D1/20 ,  D21D1/30 ,  D21H11/18

公开(公告)号：SE545614C2

公开(公告)日：2023-11-14

申请号：SE2051027

申请日：2020-09-01

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KORVENNIEMI JUHA ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ

IPC: D21H25/04 ,  B32B29/00 ,  D21H11/18 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer machine glazed paper comprising highly refined cellulose fibers, the method comprising the steps of: forming a first wet web by applying at least one first pulp suspension comprising highly refined cellulose fibers on a first wire; partially dewatering the first wet web to obtain a first partially dewatered web; forming a second wet web by applying at least one second pulp suspension comprising highly refined cellulose fibers on a second wire; partially dewatering the second wet web to obtain a second partially dewatered web; joining the first and second partially dewatered web to obtain a multilayer web; optional dewatering the multilayer web in a dewatering unit, and glazing the multilayer web in at least one glazing unit to obtain a multilayer machine glazed paper comprising highly refined cellulose fibers. The invention also relates to a multiply MG paper produced according to the method.

公开(公告)号：SE544671C2

公开(公告)日：2022-10-11

申请号：SE2050425

申请日：2020-04-15

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ ,  LYYTIKÄINEN KATJA

IPC: C08J5/18 ,  B32B29/02 ,  B82Y30/00 ,  C08L1/02 ,  D21F1/00 ,  D21F11/04 ,  D21H11/18 ,  D21H21/56 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire;b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web by applying a foamed second pulp suspension comprising highly refined cellulose fibers and a foaming agent on a second wire; d) partially dewatering the foamed second wet web to obtain a second partially dewatered web;e) joining the first and second partially dewatered web to obtain a multilayer web; andf) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.

公开(公告)号：SE2150273A1

公开(公告)日：2022-09-11

申请号：SE2150273

申请日：2021-03-10

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ

IPC: D21H11/18 ,  B01D33/04 ,  B01D33/044 ,  B32B29/00 ,  C08J5/18 ,  D21F1/80

Abstract: The present invention relates to a method for fractionation of a highly refined cellulose pulp into a fine fraction and coarse fraction, said method comprising:a) providing a highly refined cellulose pulp suspension comprising highly refined cellulose pulp having a Schopper-Riegler (SR) number in the range of 40-98 as determined by standard ISO 5267-1;b) subjecting the highly refined cellulose pulp suspension to dewatering in a highspeed belt filter;c) collecting the dewatered retentate as the coarse fraction; andd) collecting the filtrate as the fine fraction;wherein the collected fine fraction contains 0.1-50 wt% of the solids of the highly refined cellulose pulp suspension provided in step a).

公开(公告)号：CA3187887A1

公开(公告)日：2022-03-10

申请号：CA3187887

申请日：2021-08-31

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN ISTO ,  BACKFOLK KAJ ,  KAUPPI ANNA ,  KORVENNIEMI JUHA ,  KANKKUNEN JUKKA

IPC: D21H25/04 ,  D21H11/18

Abstract: The present invention relates to a method for producing a machine glazed paper comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 0.1 wt-% to 50 wt-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a wire wherein said web has a dry content of 1-25% by weight, dewatering the fibrous web in at least one dewatering unit, glazing at least one side of the dewatered fibrous web in a glazing unit to form the machine glazed paper. The invention further relates to a MG paper produced according to the method.

公开(公告)号：SE2051031A1

公开(公告)日：2022-03-02

申请号：SE2051031

申请日：2020-09-01

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KORVENNIEMI JUHA ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ ,  HJERPE MIKAEL

IPC: D21H11/18 ,  B32B27/10 ,  B32B29/00 ,  B65D65/40 ,  C08J5/18 ,  D21F1/02 ,  D21F1/08 ,  D21F1/20 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a film comprising highly refined cellulose fibers in a paper-making machine, the method comprising the steps of: a) providing an aqueous pulp suspension comprising at least 20% by dry weight of highly refined cellulose fibers having an SR (Schopper-Riegler) value in the range of 80-100 at a consistency in the range of 0.8-3 wt% and; b) deflocculating and diluting the aqueous pulp suspension to a lower consistency in the range of 0.1-1.5 wt% by injecting the aqueous pulp suspension into an aqueous stream using a high shear mixer to obtain a diluted aqueous pulp suspension; and c) feeding the diluted aqueous pulp suspension to a headbox of the paper-making machine.

公开(公告)号：SE2050770A1

公开(公告)日：2021-12-27

申请号：SE2050770

申请日：2020-06-26

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KORVENNIEMI JUHA ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ ,  HJERPE MIKAEL

IPC: D21H11/18 ,  B82Y30/00 ,  C08J5/18 ,  D21F3/02

Abstract: The present invention relates to a method for dewatering a web comprising microfibrillated cellulose, wherein the method comprises the steps of: providing a suspension comprising between 50 wt-% to 100 wt-% of microfibrillated cellulose based on total dry weight, forming a fibrous web of said suspension on a support wherein said web has a dry content of 1-25% by weight, applying a dewatering felt into direct contact with the fibrous web, conducting said fibrous web, arranged between said dewatering felt and said support, through at least one shoe press, drying the dewatered web to form a film which film has an Oxygen Transmission Rate (OTR) value (23°C, 50% RH) below 100 cc/m2/24h according to ASTM D-3985.

公开(公告)号：SE2050424A1

公开(公告)日：2021-10-16

申请号：SE2050424

申请日：2020-04-15

Applicant: STORA ENSO OYJ

Inventor： KAUPPI ANNA ,  HEISKANEN ISTO ,  KANKKUNEN JUKKA ,  BACKFOLK KAJ

IPC: C08J5/18 ,  B32B29/02 ,  B82Y30/00 ,  C08L1/02 ,  D21F1/00 ,  D21F11/04 ,  D21H11/18 ,  D21H27/30

Abstract: The present invention relates to a method for manufacturing a multilayer film comprising highly refined cellulose fibers, the method comprising the steps of: a) forming a first wet web by applying a first pulp suspension comprising highly refined cellulose fibers on a first wire;b) partially dewatering the first wet web to obtain a first partially dewatered web; c) forming a second wet web by applying a second pulp suspension comprising highly refined cellulose fibers on a second wire;d) partially dewatering the second wet web to obtain a second partially dewatered web;e) joining the first and second partially dewatered web to obtain a multilayer web; andf) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.