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EP 4 437 181 A1

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(43) Date of publication: 02.10.2024 Bulletin 2024/40 (21) Application number: 22822335.0 (22) Date of filing: 23.11.2022

(51) International Patent Classification (IPC):  D21H 17/28(2006.01) D21H 19/54(2006.01) D21H 27/30(2006.01) D21H 19/84(2006.01) D21H 19/38(2006.01) D21H 27/10(2006.01) D21H 19/82(2006.01) (52) Cooperative Patent Classification (CPC): D21H 17/28; D21H 19/385; D21H 27/30; D21H 19/54; D21H 27/10; D21H 19/84; D21H 19/82; D21H 19/826 (86) International application number: PCT/EP2022/083031 (87) International publication number: WO 2023/094476 (01.06.2023 Gazette 2023/22)

(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: 26.11.2021 EP 21210830 (71) Applicant: Billerud Aktiebolag (publ) 169 27 Solna (SE)	(72) Inventor: LARSSON, Johan 805 98 Gävle (SE) (74) Representative: Kransell & Wennborg KB  P.O. Box 27834 115 93 Stockholm 115 93 Stockholm (SE)