公开(公告)号：US20210268783A1

公开(公告)日：2021-09-02

申请号：US17256058

申请日：2019-06-25

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Frank Peng ,  Atso Laakso ,  Ari-Pekka Määttänen

IPC: B32B29/08 ,  D21H11/02 ,  B32B29/00 ,  B32B7/05 ,  D21H27/30 ,  D21H11/08 ,  D21H11/10 ,  D21H11/18 ,  D21H17/28 ,  D21H17/42 ,  D21H17/44 ,  D21H27/40

Abstract: The invention relates to a lightweight linerboard for corrugated board with good strength properties and which reduces problems with washboarding in the thereof produced corrugated board. The linerboard of the invention comprises at least one ply comprising 20-80 wt % CTMP from wood fibers and 20-80 wt % chemical pulp, all percentages calculated on the total fiber weight of said first ply, wherein the CTMP exhibits a bulk of at least 2.5 cm3/g.

公开(公告)号：US11926128B2

公开(公告)日：2024-03-12

申请号：US17256058

申请日：2019-06-25

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Frank Peng ,  Atso Laakso ,  Ari-Pekka Määttänen

IPC: B32B29/08 ,  B32B7/05 ,  B32B29/00 ,  D21H11/02 ,  D21H11/04 ,  D21H11/08 ,  D21H11/10 ,  D21H11/18 ,  D21H17/28 ,  D21H17/42 ,  D21H17/44 ,  D21H27/30 ,  D21H27/40

CPC classification number: B32B29/08 ,  B32B7/05 ,  B32B29/005 ,  D21H1/02 ,  D21H11/02 ,  D21H11/04 ,  D21H11/08 ,  D21H11/10 ,  D21H11/18 ,  D21H17/28 ,  D21H17/42 ,  D21H17/44 ,  D21H27/40 ,  B32B2250/26 ,  B32B2307/546 ,  B32B2307/718 ,  B32B2307/72

Abstract: The invention relates to a lightweight linerboard for corrugated board with good strength properties and which reduces problems with washboarding in the thereof produced corrugated board. The linerboard of the invention comprises at least one ply comprising 20-80 wt % CTMP from wood fibers and 20-80 wt % chemical pulp, all percentages calculated on the total fiber weight of said first ply, wherein the CTMP exhibits a bulk of at least 2.5 cm3/g.

公开(公告)号：US20230019391A1

公开(公告)日：2023-01-19

申请号：US17757602

申请日：2020-12-11

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Janne Myllykangas ,  Petri Paakkanen ,  Atso Laakso ,  Kaj Backfolk

IPC: D21F11/12 ,  D21F1/02 ,  D21F11/04 ,  D21F3/02 ,  B32B29/00 ,  B32B29/08 ,  B32B3/28 ,  B32B7/12

Abstract: The invention relates to a method to produce a linerboard exhibiting a high bending resistance and a high compression strength, which in turn provides high resistance to interflute buckling and sagging in a thereof formed corrugated board. This is achieved by the inventive combination of an optimized fiber refining level of the furnish in each layer of the linerboard, the separate formation of the top layer and the use of a multi-layer headbox to form the two-layered ply. In addition, the linerboard made according to the invention provides good printing properties in a thereof produced corrugated board, especially in flexographic printing, without the fluting structure being negatively affected.

公开(公告)号：US20210221114A1

公开(公告)日：2021-07-22

申请号：US17256060

申请日：2019-06-25

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Frank Peng ,  Atso Laakso ,  Ari-Pekka Määttänen

IPC: B32B29/00 ,  B32B7/12 ,  B32B29/08 ,  B65D65/40 ,  D21H11/02 ,  D21H11/18 ,  D21H11/10 ,  D21H21/18 ,  D21H17/28 ,  D21H17/45 ,  D21H17/68 ,  D21H17/00 ,  D21H27/40 ,  D21H27/10

Abstract: The invention relates to a ply of a linerboard for corrugated board, which ply exhibits high strength properties and which enables the production of lightweight linerboards. The ply of the invention comprises 20-80 wt % CTMP from wood fibers and 80-20 wt % chemical pulp, calculated on the total fiber weight of said ply and strength additives chosen from the group of microfibrillated cellulose (MFC), anionic or cationic polymers and starchor combinations thereof. The ply exhibits a geometric SCT index of above 22 Nm/g and a density of below 680 kg/m3, preferably of below 650 kg/m3.

公开(公告)号：US12234605B2

公开(公告)日：2025-02-25

申请号：US17757602

申请日：2020-12-11

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Janne Myllykangas ,  Petri Paakkanen ,  Atso Laakso ,  Kaj Backfolk

IPC: D21F11/12 ,  B32B3/28 ,  B32B7/12 ,  B32B29/00 ,  B32B29/08 ,  D21F1/02 ,  D21F3/02 ,  D21F11/04

Abstract: The invention relates to a method to produce a linerboard exhibiting a high bending resistance and a high compression strength, which in turn provides high resistance to interflute buckling and sagging in a thereof formed corrugated board. This is achieved by the inventive combination of an optimized fiber refining level of the furnish in each layer of the linerboard, the separate formation of the top layer and the use of a multi-layer headbox to form the two-layered ply. In addition, the linerboard made according to the invention provides good printing properties in a thereof produced corrugated board, especially in flexographic printing, without the fluting structure being negatively affected.

公开(公告)号：US12053964B2

公开(公告)日：2024-08-06

申请号：US17256060

申请日：2019-06-25

Applicant: Stora Enso OYJ

Inventor： Seppo Lampainen ,  Frank Peng ,  Atso Laakso ,  Ari-Pekka Määttänen

IPC: B32B29/00 ,  B32B7/12 ,  B32B29/08 ,  B65D65/40 ,  D21H11/02 ,  D21H11/10 ,  D21H11/18 ,  D21H17/00 ,  D21H17/28 ,  D21H17/45 ,  D21H17/68 ,  D21H21/18 ,  D21H27/10 ,  D21H27/40

CPC classification number: B32B29/005 ,  B32B7/12 ,  B32B29/08 ,  B65D65/403 ,  D21H11/02 ,  D21H11/10 ,  D21H11/18 ,  D21H17/28 ,  D21H17/45 ,  D21H17/68 ,  D21H17/74 ,  D21H21/18 ,  D21H27/10 ,  D21H27/40 ,  B32B2250/03 ,  B32B2250/26 ,  B32B2307/546 ,  B32B2307/718 ,  B32B2307/72 ,  B32B2553/00

Abstract: The invention relates to a ply of a linerboard for corrugated board, which ply exhibits high strength properties and which enables the production of lightweight linerboards. The ply of the invention comprises 20-80 wt % CTMP from wood fibers and 80-20 wt % chemical pulp, calculated on the total fiber weight of said ply and strength additives chosen from the group of microfibrillated cellulose (MFC), anionic or cationic polymers and starch or combinations thereof. The ply exhibits a geometric SCT index of above 22 Nm/g and a density of below 680 kg/m3, preferably of below 650 kg/m3.