公开(公告)号：WO2022049483A1

公开(公告)日：2022-03-10

申请号：PCT/IB2021/057941

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 ,  D21H27/00

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：WO2021209915A1

公开(公告)日：2021-10-21

申请号：PCT/IB2021/053069

申请日：2021-04-14

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  BACKFOLK, Kaj ,  LYYTIKÄINEN, Katja ,  KANKKUNEN, Jukka ,  KAUPPI, Anna

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; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.

公开(公告)号：WO2021209917A1

公开(公告)日：2021-10-21

申请号：PCT/IB2021/053071

申请日：2021-04-14

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  BACKFOLK, Kaj ,  KAUPPI, Anna ,  KANKKUNEN, Jukka

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; and f) further dewatering, and optionally drying, the multilayer web to obtain a multilayer film comprising highly refined cellulose fibers.

公开(公告)号：WO2014174429A1

公开(公告)日：2014-10-30

申请号：PCT/IB2014/060890

申请日：2014-04-22

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  SAUKKONEN, Esa ,  BACKFOLK, Kaj ,  KAUPPI, Anna ,  SAXELL, Heidi ,  LYYTIKÄINEN, Katja

IPC: D21H11/18 ,  D21H17/37 ,  C08B11/15 ,  D21H11/20 ,  D21H17/55

CPC classification number: D21H21/30 ,  C08L1/02 ,  C08L2205/16 ,  D21H11/04 ,  D21H11/18 ,  D21H17/375 ,  D21H17/42 ,  D21H21/28 ,  C08L33/26

Abstract: The invention relates to a process for treating cellulose fibres which process comprises the steps of providing a slurry comprising cellulose fibers, adding anionic polyacrylamide (A-PAM) with high molar mass to the slurry in a first step and subjecting the slurry comprising fibers and A-PAM to a mechanical treatment in a second step thereby forming a composition comprising microfibrillated cellulose. The invention further relates to a composition produced according to the process.

Abstract translation: 本发明涉及一种处理纤维素纤维的方法，该方法包括以下步骤：提供包含纤维素纤维的浆料，在第一步中向浆料中加入高摩尔质量的阴离子聚丙烯酰胺（A-PAM），并对包含纤维和A -PAM在第二步中进行机械处理，由此形成包含微纤化纤维素的组合物。 本发明还涉及根据该方法生产的组合物。

公开(公告)号：WO2022049482A1

公开(公告)日：2022-03-10

申请号：PCT/IB2021/057940

申请日：2021-08-31

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  BACKFOLK, Kaj ,  KAUPPI, Anna ,  LYYTIKÄINEN, Katja ,  KANKKUNEN, Jukka ,  KORVENNIEMI, Juha

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; and d) dewatering, and optionally drying, the formed multilayer web to obtain a multilayer film comprising MFC.

公开(公告)号：WO2021260608A1

公开(公告)日：2021-12-30

申请号：PCT/IB2021/055592

申请日：2021-06-24

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  BACKFOLK, Kaj ,  KANKKUNEN, Jukka ,  KAUPPI, Anna ,  HJERPE, Mikael ,  KORVENNIEMI, Juha

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 equipment, 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：WO2022189957A1

公开(公告)日：2022-09-15

申请号：PCT/IB2022/052036

申请日：2022-03-08

Applicant: STORA ENSO OYJ

Inventor： HEISKANEN, Isto ,  BACKFOLK, Kaj ,  KANKKUNEN, Jukka ,  KAUPPI, Anna

IPC: D21H11/18 ,  B32B29/00 ,  C08J5/18 ,  D21C9/06 ,  D21D5/02 ,  D21F1/80 ,  B01D33/04 ,  B01D33/044

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 and a content of fibers having a length >0.2 mm of at least 7 million fibers per gram based on dry weight; b) subjecting the highly refined cellulose pulp suspension to dewatering in a belt filter; c) collecting the dewatered retentate as the coarse fraction; and d) collecting the filtrate as the fine fraction; wherein the collected fine fraction contains 2-50 wt% of the solids of the highly refined cellulose pulp suspension provided in step a).

公开(公告)号：WO2022049484A1

公开(公告)日：2022-03-10

申请号：PCT/IB2021/057942

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：WO2022049481A1

公开(公告)日：2022-03-10

申请号：PCT/IB2021/057939

申请日：2021-08-31

Applicant: STORA ENSO OYJ

Inventor： KAUPPI, Anna ,  HEISKANEN, Isto ,  BACKFOLK, Kaj ,  KANKKUNEN, Jukka ,  HJERPE, Mikael ,  KORVENNIEMI, Juha

IPC: D21H11/18 ,  C08J5/18 ,  D21F1/02 ,  B32B27/10 ,  B32B29/00 ,  B65D65/40 ,  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-Riegier) 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：WO2014106684A1

公开(公告)日：2014-07-10

申请号：PCT/FI2013/051213

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 ,  D21H11/18 ,  D21D1/20 ,  D21D1/30

CPC classification number: D21H17/005 ,  C08B15/08 ,  C08L1/04 ,  D21C9/007 ,  D21D1/20 ,  D21H11/04 ,  D21H11/18

Abstract: The invention relates to methods of producing microfibrillated cellulose (MFC). According to the invention a fibrous pulp suspension is fibrillated mechanically at a consistency of less than 12.5 %, dewatered to raise the consistency of the fibrillated suspension to at least 12.5 %, and then subjected in the dewatered condition to further fibrillation. Alternatively an initially fibrillated fibrous pulp suspension may be dewatered and fibrillated in the dewatered condition, after which these dewatering and fibrillating steps are repeated one or more times so that pulp consistency is increased for each fibrillation step. The goals of raising the consistency between subsequent fibrillations are energy saving and an increased aspect ratio in MFC. The invention even comprises uses of the MFC product, e.g. as an additive for papermaking furnish or injection molded plastic composites.

Abstract translation: 本发明涉及微纤化纤维素（MFC）的制造方法。 根据本发明，纤维纸浆悬浮液以小于12.5％的稠度机械原纤化，脱水以将原纤化悬浮液的稠度提高至至少12.5％，然后在脱水条件下进一步原纤化。 或者，最初原纤化的纤维纸浆悬浮液可以在脱水条件下脱水和原纤化，之后将这些脱水和原纤化步骤重复一次或多次，以使每个原纤化步骤的纸浆稠度增加。 提高后续原纤化之间的一致性的目标是在MFC中节能和增加的纵横比。 本发明甚至包括MFC产品的用途，例如， 作为造纸配料或注塑塑料复合材料的添加剂。