公开(公告)号：SE546733C2

公开(公告)日：2025-02-11

申请号：SE2230363

申请日：2022-11-11

Applicant: STORA ENSO OYJ

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

IPC: C08J5/18 ,  B32B27/10 ,  B32B29/00 ,  C08L1/02 ,  D21H11/18 ,  D21H27/38

Abstract: The present invention relates to a barrier film for a paper or paperboard-based packaging material, said barrier film comprising cellulosic fibers and highly refined cellulose wherein the barrier film comprises less than 50 wt-% of highly refined cellulose based on the total fiber content and the barrier film having an air permeance above 2000 pm/Pas and a geometric mean tensile index above 70 Nm/g. The invention also relates to a paper or paperboard-based packaging material comprising the barrier film and a method for producing said film.

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.