(19)

(11)

EP 4 323 584 A1

(12)

(43) Date of publication: 21.02.2024 Bulletin 2024/08 (21) Application number: 22722738.6 (22) Date of filing: 13.04.2022

(51) International Patent Classification (IPC):  D21H 17/25(2006.01) D21H 17/26(2006.01) D21H 17/36(2006.01) B65D 65/42(2006.01) D21H 17/28(2006.01) D21H 27/10(2006.01) (52) Cooperative Patent Classification (CPC): D21H 17/25; D21H 17/36; D21H 17/28; D21H 17/26; D21H 27/10; B65D 65/42; B65D 65/40 (86) International application number: PCT/EP2022/059874 (87) International publication number: WO 2022/219043 (20.10.2022 Gazette 2022/42)

(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: 13.04.2021 EP 21168232 (71) Applicant: Billerud Aktiebolag (publ) 169 27 Solna (SE)	(72) Inventors: MARKBO, Olivia 222 20 Lund (SE) ALDÉN, Mats 266 31 Munka Ljungby (SE) NYMAN, Ulf 241 92 Eslöv (SE) NORDSTRÖM, Fredrik 652 26 Karlstad (SE) (74) Representative: Kransell & Wennborg KB  P.O. Box 27834 115 93 Stockholm 115 93 Stockholm (SE)