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(11)

EP 4 297 952 A1

(12)

(43) Date of publication: 03.01.2024 Bulletin 2024/01 (21) Application number: 22759065.0 (22) Date of filing: 25.02.2022

(51) International Patent Classification (IPC):  B29C 48/154(2019.01) C08K 7/02(2006.01) B29C 48/157(2019.01) E04C 3/36(2006.01) (52) Cooperative Patent Classification (CPC): B29C 48/154; B29C 48/157; E04C 3/29; B29C 48/07 (86) International application number: PCT/IB2022/051675 (87) International publication number: WO 2022/180588 (01.09.2022 Gazette 2022/35)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 26.02.2021 SE 2150211 (71) Applicant: Stora Enso Oyj 00101 Helsinki (FI)	(72) Inventors: BERGSTRÖM, Roger 314 31 Hyltebruk (SE) VÄNTSI, Olli 54100 Lappeenranta (FI) KÄLLSTRÖM, Fredrik 314 31 Hyltebruk (SE) (74) Representative: Steinrud, Henrik  Stora Enso AB Group Intellectual Property Box 9090 65009 Karlstad 65009 Karlstad (SE)