(19)
(11) EP 4 816 613 A1

(12)

(43) Date of publication:
07.10.2026 Bulletin 2026/41

(21) Application number: 24896839.8

(22) Date of filing: 19.11.2024
(51) International Patent Classification (IPC): 
D21H 19/82(2006.01)
B65D 65/38(2006.01)
D21H 23/34(2006.01)
 B32B 29/00(2006.01)
D21H 19/36(2006.01)
(52) Cooperative Patent Classification (CPC):
D21H 19/36; D21H 19/82; D21H 23/34; D21H 27/10; D21H 19/84; B32B 29/005; B32B 2255/12; B32B 2255/26; B32B 2255/28; B32B 2439/70; B32B 2307/7246; B32B 2307/31; B32B 2250/26
(86) International application number:
PCT/IB2024/061557
(87) International publication number:
WO 2025/114812 (05.06.2025 Gazette 2025/23)
(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:
GE KH MA MD TN

(30) Priority: 01.12.2023 SE 2330535

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

(72) Inventors:
  • BONNERUP, Chris
    448 34 Floda (SE)
  • BACKFOLK, Kaj
    53100 Lappeenranta (FI)

(74) Representative: Steinrud, Henrik 
Stora Enso AB Group Intellectual Property Box 9090
65009 Karlstad
65009 Karlstad (SE)

   


(54) A METHOD OF MANUFACTURING A HEAT-SEALABLE PAPERBOARD FOR PACKAGING OF LIQUID, DRY AND/OR FROZEN FOOD; A HEAT-SEALABLE PAPERBOARD AND A PACKAGE FROM SAID PAPERBOARD