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EP 4 453 313 A1

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(43) Date of publication: 30.10.2024 Bulletin 2024/44 (21) Application number: 22844479.0 (22) Date of filing: 22.12.2022

(51) International Patent Classification (IPC):  D21H 27/10(2006.01) D21H 17/37(2006.01) D21H 17/55(2006.01) D21H 21/18(2006.01) D21H 21/20(2006.01) D21H 17/52(2006.01) D21H 17/56(2006.01) D21H 17/28(2006.01) (52) Cooperative Patent Classification (CPC): D21H 17/375; D21H 17/55; D21H 17/56; D21H 21/18; D21H 21/20; D21H 17/52; D21H 27/10; D21H 17/28 (86) International application number: PCT/EP2022/087656 (87) International publication number: WO 2023/118535 (29.06.2023 Gazette 2023/26)

(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: 22.12.2021 EP 21217014 (71) Applicant: Billerud Aktiebolag (publ) 169 27 Solna (SE)	(72) Inventors: ATHLEY, Karin 603 75 Norrköping (SE) WAHLSTRÖM, Lars 603 70 Norrköping (SE) (74) Representative: Kransell & Wennborg KB  P.O. Box 27834 115 93 Stockholm 115 93 Stockholm (SE)