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公开(公告)号：SE546910C2
公开(公告)日：2025-03-11
申请号：SE2330313
申请日：2023-07-05
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises preparing an MFC suspension (2) and forming a wet MFC web (7) from the MFC suspension by casting on a non-porous support (8). The wet MFC web positioned on the non-porous support is subjected to water removal by means of dewatering and/or drying to form a dry MFC web (11). Broke material is discharged and collected. Collected broke material (13, 20) is mixed with water to provide at least one broke suspension (16, 22) wherein at least 90 weight-% of each broke suspension passes a Mesh 30 screen according to SCAN-CM 66:05. The broke suspension(s) is/are subjected to a mechanical treatment. The broke suspension(s) is/are used in the preparation of the MFC suspension. The mechanical treatment is performed to increase the viscosity of the broke suspension(s) to at least 60% of the viscosity of the MFC suspension without the broke suspension(s).
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公开(公告)号：SE2330067A1
公开(公告)日：2024-08-08
申请号：SE2330067
申请日：2023-02-07
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for manufacturing a paper or paperboard based packaging laminate, said method comprising:a) providing a paper or paperboard substrate,b) providing a microfibrillated cellulose (MFC) film comprising at least 50 wt% of MFC based on the dry weight of the MFC film, andc) laminating a surface of the paper or paperboard substrate to a surface of the MFC film by a melt adhesive process using a melt adhesive comprising at least 50 wt% of a water soluble thermoplastic polymer based on the dry weight of the melt adhesive, wherein the melt adhesive is applied to the surface of the paper or paperboard substrate and/or to the surface of the MFC film in a low solvent or solvent free form.
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Patent Agency Ranking
公开(公告)号：SE546696C2
公开(公告)日：2025-02-11
申请号：SE2350820
申请日：2023-06-30
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises providing an MFC suspension (2) comprising water as suspension medium. A wet MFC web (4) is formed of the MFC suspension by casting on a non-porous support (5). The wet MFC web (4) positioned on the nonporous support (5) is subjected to water removal by means of press dewatering and/or non-contact drying to form a dry MFC web (8). The water removal further comprises at least one induction heating step, wherein each induction heating step comprises heating said wet MFC web (4) by means of an induction heated device (10). The dry MFC web (8) is separated from the non-porous support (5).
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公开(公告)号：SE2330305A1
公开(公告)日：2024-12-30
申请号：SE2330305
申请日：2023-06-29
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises preparing an MFC suspension comprising water as suspension medium. A wet MFC web is formed of the MFC suspension by casting on a non-porous support or on a paper or paperboard substrate positioned on the non-porous support. The wet MFC web formed on the non-porous support or on a paper or paperboard substrate positioned on the non-porous support is subjected to water removal by means of dewatering and/or drying to form the MFC web. Water removed from the wet MFC web by the water removal is collected into at least one water fraction. Optionally, the at least one water fraction is subjected to a purification treatment. The at least one water fraction is used as suspension medium in the preparation of the MFC suspension.
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公开(公告)号：SE546698C2
公开(公告)日：2025-02-11
申请号：SE2330252
申请日：2023-06-02
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , SUHONEN MIKKO
Abstract: The present document discloses a method for producing microfibrillated cellulose (MFC) comprising the steps of:a) provide a refined pulp suspension (P) mixed with an enzyme to a reactor tank (2);b) treat the refined pulp suspension with said enzyme in the reactor tank at a temperature between 40-80°C under controlled mixing by means of an agitating member (7) thus forming a pre-treated pulp suspension;c) adding at least one oxidant (4) to said pre-treated pulp suspension simultaneous to mixing;d) perform oxidation of said pre-treated pulp suspension under elevated temperatures >80°C in said reactor tank for deactivating said enzyme; and e) discharge the pre-treated, pre-refined pulp suspension and subjecting it to further mechanical treatment (6) to obtain MFC.
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公开(公告)号：SE2330313A1
公开(公告)日：2025-01-06
申请号：SE2330313
申请日：2023-07-05
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises preparing an MFC suspension and forming a wet MFC web from the MFC suspension by casting on a non-porous support. The wet MFC web positioned on the non-porous support is subjected to water removal by means of dewatering and/or drying to form a dry MFC web. Broke material is discharged and collected. Collected broke material is mixed with water to provide at least one broke suspension wherein at least 90 weight-% of each broke suspension passes a Mesh 30 screen according to SCAN-CM 66:05. The broke suspension(s) is/are subjected to a mechanical treatment. The broke suspension(s) is/are used in the preparation of the MFC suspension. The mechanical treatment is performed to increase the viscosity of the broke suspension(s) to at least 60% of the viscosity of the MFC suspension without the broke suspension(s).
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公开(公告)号：SE2350820A1
公开(公告)日：2024-12-31
申请号：SE2350820
申请日：2023-06-30
Applicant: STORA ENSO OYJ
Inventor： KARPPINEN ANNI , BACKFOLK KAJ , NYLÉN OTTO
Abstract: The present invention relates to a method for producing a microfibrillated cellulose (MFC) web. The method comprises providing an MFC suspension (2) comprising water as suspension medium. A wet MFC web (4) is formed of the MFC suspension by casting on a non-porous support (5). The wet MFC web (4) positioned on the nonporous support (5) is subjected to water removal by means of press dewatering and/or non-contact drying to form a dry MFC web (8). The water removal further comprises at least one induction heating step, wherein each induction heating step comprises heating said wet MFC web (4) by means of an induction heated device (10). The dry MFC web (8) is separated from the non-porous support (5).
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