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EP 3 966 379 A1

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(43) Date of publication: 16.03.2022 Bulletin 2022/11 (21) Application number: 21713059.0 (22) Date of filing: 25.03.2021

(51) International Patent Classification (IPC):  D04H 1/587(2012.01) D04H 3/12(2006.01) D04H 1/64(2012.01) D06N 5/00(2006.01) (52) Cooperative Patent Classification (CPC): D04H 1/587; D04H 1/64; D04H 3/12; D06N 5/003 (86) International application number: PCT/EP2021/057696 (87) International publication number: WO 2021/197999 (07.10.2021 Gazette 2021/40)

(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: 30.03.2020 EP 20166708 21.04.2020 EP 20170583 04.12.2020 EP 20211895 (71) Applicant: Freudenberg Performance Materials SE & Co. KG 69469 Weinheim (DE)	(72) Inventors: ASSUMMA, Luca 20831 Seregno (IT) CONVERSO, Maria 20900 Monza (IT) D'ANDRIA, Laura 22063 Cantù (IT) (74) Representative: Banse & Steglich Patentanwälte PartmbB  Patentanwaltskanzlei Herzog-Heinrich-Straße 23 80336 München 80336 München (DE)