(19)
(11) EP 4 544 116 A1

(12)

(43) Date of publication:
30.04.2025 Bulletin 2025/18

(21) Application number: 23826637.3

(22) Date of filing: 19.06.2023
(51) International Patent Classification (IPC): 
D21H 11/18(2006.01)
B32B 5/04(2006.01)
D21H 27/40(2006.01)
B32B 3/30(2006.01)
 B32B 3/28(2006.01)
C08J 5/18(2006.01)
B29C 59/02(2006.01)
B32B 38/06(2006.01)
(52) Cooperative Patent Classification (CPC):
B32B 3/28; B32B 3/30; C08J 5/18; D21H 11/18; B32B 29/005; B32B 29/08; B32B 2307/7376; B32B 2307/54; B32B 2307/7244; B32B 2307/718; B32B 2307/72; B29C 59/04; D21H 27/02; D21H 21/16; C08J 2301/02
(86) International application number:
PCT/IB2023/056318
(87) International publication number:
WO 2023/248099 (28.12.2023 Gazette 2023/52)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 22.06.2022 SE 2230203

(71) Applicant: Stora Enso Oyj
00101 Helsinki (FI)

(72) Inventors:
  • BACKFOLK, Kaj
    53100 Lappeenranta (FI)
  • HEISKANEN, Isto
    55100 Imatra (FI)
  • KANKKUNEN, Jukka
    55800 Imatra (FI)
  • SVENSSON, Adrianna
    65638 Karlstad (SE)

(74) Representative: Forsberg, Anna Karin 
Stora Enso OYJ Group Intellectual Property Box 9090
65009 Karlstad
65009 Karlstad (SE)

   


(54) A BARRIER FILM FOR A CELLULOSE-BASED SUBSTRATE AND A METHOD OF MANUFACTURING A BARRIER FILM