公开(公告)号：US10138599B2

公开(公告)日：2018-11-27

申请号：US15535456

申请日：2015-12-14

Applicant: STORA ENSO OYJ

Inventor： Christian Aulin ,  Lars Axrup ,  Göran Flodberg ,  Magnus Hillergren ,  Tom Lindström ,  Carl-Henrik Ljungqvist ,  Göran Ström

IPC: D21H19/34 ,  D21H23/50 ,  D21H23/70 ,  D21H27/10 ,  D21H27/32 ,  D21H11/18 ,  B32B37/15 ,  B32B37/24

Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibers, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibers and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalized fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.

公开(公告)号：US20240010405A1

公开(公告)日：2024-01-11

申请号：US18249781

申请日：2021-10-19

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist

IPC: B65D65/42 ,  B65D71/32 ,  D21H21/20 ,  D21H21/16 ,  D21H19/46 ,  D21H19/82

CPC classification number: B65D65/42 ,  B65D71/32 ,  D21H21/20 ,  D21H21/16 ,  D21H19/46 ,  D21H19/824 ,  B65D2571/00444 ,  B65D2571/0066 ,  B65D2571/00716

Abstract: The invention relates to a coated paperboard (10) for beverage container carriers (30) comprising: a paperboard substrate (12), a dispersion coating layer (18, 20) on each side (14, 16) of the paperboard substrate (12), wherein the paperboard substrate (12) comprises wet strength agents in an amount in a range from ≥0 wt % to ≤0.05 wt %, based on the dry solid content of the substrate (12) and sizing agents for making the paperboard (12) substrate more hydrophobic, wherein the sizing agents are present in an amount of ≥0.15 wt %, especially in a range from ≥0.15 wt % to ≤0.5 wt %, based on the dry solid content of the substrate (12). The invention further relates to a beverage container carrier (30) comprising or being made from the aforementioned coated paperboard (10).

公开(公告)号：US20250043512A1

公开(公告)日：2025-02-06

申请号：US18705099

申请日：2022-10-25

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist ,  Isto Heiskanen ,  Kaj Backfolk

IPC: D21H11/14 ,  D21B1/02 ,  D21C1/06 ,  D21C5/00

Abstract: The present invention relates to a method for manufacturing a highly refined cellulose composition, comprising: i) providing a fiber fraction comprising 20-100 wt % fibers obtained from used beverage cartons (UBC) based on the total dry fiber weight of the fiber fraction, ii) optionally subjecting the fiber fraction to mechanical, chemical or enzymatic pre-treatment, or a combination thereof, iii) subjecting the optionally pre-treated fiber fraction to refining at a consistency in the range of 0.5-30% by weight to a Schopper-Riegler (SR) in the range of 50-100, as determined by standard ISO 5267-1, to obtain the highly refined cellulose composition.

公开(公告)号：US12179980B2

公开(公告)日：2024-12-31

申请号：US18249781

申请日：2021-10-19

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist

IPC: B65D65/42 ,  B65D71/32 ,  D21H19/46 ,  D21H19/82 ,  D21H21/16 ,  D21H21/20

Abstract: The invention relates to a coated paperboard (10) for beverage container carriers (30) comprising: a paperboard substrate (12), a dispersion coating layer (18, 20) on each side (14, 16) of the paperboard substrate (12), wherein the paperboard substrate (12) comprises wet strength agents in an amount in a range from ≥0 wt % to ≤0.05 wt %, based on the dry solid content of the substrate (12) and sizing agents for making the paperboard (12) substrate more hydrophobic, wherein the sizing agents are present in an amount of ≥0.15 wt %, especially in a range from ≥0.15 wt % to ≤0.5 wt %, based on the dry solid content of the substrate (12). The invention further relates to a beverage container carrier (30) comprising or being made from the aforementioned coated paperboard (10).

公开(公告)号：US20250012011A1

公开(公告)日：2025-01-09

申请号：US18705088

申请日：2022-10-25

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist ,  Lena Tollnerius ,  Kaj Backfolk

IPC: D21D5/02

Abstract: The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps: a) subjecting UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction; b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles; c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one washing step; d) optionally subjecting the fine screened UBC fiber fraction to a washing method to remove further contaminants; e) optionally subjecting the fine screened UBC fiber fraction to a bleaching method; f) subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least wt %; and g) subjecting the dewatered UBC fiber fraction to deactivation to obtain a purified 20 UBC fiber fraction.

公开(公告)号：US20240416635A1

公开(公告)日：2024-12-19

申请号：US18705095

申请日：2022-10-25

Applicant: Stora Enso OYJ

Inventor： Carl-Henrik Ljungqvist ,  Kaj Backfolk

IPC: B32B29/06 ,  B32B7/12 ,  B32B29/02 ,  B32B37/12

Abstract: The present invention relates to food or liquid packaging laminate comprising fibers obtained from used beverage cartons (UBC), said food or liquid packaging laminate comprising: a paperboard layer, and a barrier layer, wherein said paperboard layer comprises no or substantially no fibers obtained from UBC, wherein said barrier layer comprises a substrate layer comprising a highly refined cellulose composition comprising fibers obtained from UBC, and a polymeric gas barrier coating disposed on at least one side of the substrate layer, and wherein said barrier layer is laminated to said paperboard layer by a polymeric sealing layer arranged between said paperboard layer and said barrier layer.

公开(公告)号：US20170342661A1

公开(公告)日：2017-11-30

申请号：US15535456

申请日：2015-12-14

Applicant: STORA ENSO OYJ

Inventor： Christian Aulin ,  Lars Axrup ,  Göran Flodberg ,  Magnus Hillergren ,  Tom Lindström ,  Carl-Henrik Ljungqvist ,  Göran Ström

IPC: D21H19/34 ,  D21H23/70 ,  D21H11/18 ,  D21H23/50 ,  D21H27/32 ,  D21H27/10

CPC classification number: D21H19/34 ,  B32B37/153 ,  B32B2037/243 ,  B32B2317/12 ,  D21H11/18 ,  D21H23/50 ,  D21H23/70 ,  D21H27/10 ,  D21H27/32

Abstract: The present invention relates to process for the production of a coated substrate comprising cellulosic fibres, the process comprising the steps of: i) providing a first substrate comprising cellulosic fibres and having a dry content of less than 50%; ii) applying a coating composition to the first substrate in an amount of more than 5 g/m2, calculated as dry weight of the coating composition, wherein the coating composition comprises: microfibrillated cellulose (MFC), and optionally a water retention agent selected from carboxymethyl cellulose (CMC), anionic polyacrylamide (A-PAM), sodium polyacrylates, polyacrylic acid derivatives, guar gum, alginate, MFC prepared from carboxymethylated fibers, MFC prepared from oxidized fibers, MFC prepared by CMC-functionalised fibers, and/or combinations thereof; and iii) mechanically dewatering the first substrate. The present process provides an energy efficient coating process which can be performed online.