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(11)

EP 4 547 909 A1

(12)

(43) Date of publication: 07.05.2025 Bulletin 2025/19 (21) Application number: 23733018.8 (22) Date of filing: 28.06.2023

(51) International Patent Classification (IPC):  D21H 19/38(2006.01) D21H 19/60(2006.01) D21H 27/10(2006.01) D21H 19/58(2006.01) D21H 21/16(2006.01) D21H 27/30(2006.01) (52) Cooperative Patent Classification (CPC): D21H 19/385; D21H 19/58; D21H 19/60; D21H 27/10; D21H 21/16; D21H 27/30 (86) International application number: PCT/EP2023/067612 (87) International publication number: WO 2024/003119 (04.01.2024 Gazette 2024/01)

(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: 28.06.2022 EP 22181454 (71) Applicant: Billerud Aktiebolag (publ) 169 27 Solna (SE)	(72) Inventors: HÄGG, Therese 812 93 Kungsgården (SE) LARSSON, Johan A. 805 98 Gävle (SE) NORDELL, Andreas 805 96 Gävle (SE) SÄLL, Krister 814 93 Skutskär (SE) (74) Representative: Kransell & Wennborg KB  P.O. Box 27834 115 93 Stockholm 115 93 Stockholm (SE)