(19)

(11)

EP 3 612 689 A1

(12)

(43) Date of publication: 26.02.2020 Bulletin 2020/09 (21) Application number: 18723624.5 (22) Date of filing: 17.04.2018

(51) International Patent Classification (IPC):  E04F 15/06(2006.01) E04F 15/02(2006.01) E04F 15/08(2006.01) (86) International application number: PCT/US2018/027848 (87) International publication number: WO 2018/195002 (25.10.2018 Gazette 2018/43)

(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: 18.04.2017 US 201762486674 P (71) Applicants: Invista North America S.A.R.L. Wilmington, Delaware 19808 (US) INVISTA Textiles (U.K.) Limited Manchester M2 3DE (GB)

(72) Inventor: RAO, Sundar Mohan Chattanooga Tennessee 37421 (US) (74) Representative: Cockerton, Bruce Roger  Carpmaels & Ransford LLP One Southampton Row London WC1B 5HA London WC1B 5HA (GB)