(19)

(11)

EP 4 171 946 A1

(12)

(43) Date of publication: 03.05.2023 Bulletin 2023/18 (21) Application number: 21742164.3 (22) Date of filing: 29.06.2021

(51) International Patent Classification (IPC):  B32B 3/18(2006.01) B32B 7/022(2019.01) B32B 7/05(2019.01) B32B 5/14(2006.01) B32B 7/03(2019.01) B32B 17/10(2006.01) (52) Cooperative Patent Classification (CPC): B32B 3/18; B32B 5/142; B32B 7/022; B32B 7/03; B32B 7/05; B32B 17/10036; B32B 17/10348; B32B 17/10688; B32B 17/10761; B32B 17/10788; B32B 17/1077; B32B 17/10743; B32B 17/10706; B32B 2605/08; B32B 2307/558; B32B 2307/56; B32B 2307/50; B32B 17/10981; B32B 17/10935; B32B 17/10293; B32B 17/10908 (86) International application number: PCT/GB2021/051645 (87) International publication number: WO 2022/003341 (06.01.2022 Gazette 2022/01)

(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: 29.06.2020 GB 202009887 (71) Applicant: Pilkington Group Limited Lathom Nr. Ormskirk Lancashire L40 5UF (GB)	(72) Inventor: STANLEY, Andrew Thomas Ormskirk Lancashire L40 5UF (GB) (74) Representative: Stanley, Andrew Thomas et al Pilkington Group Limited Intellectual Property Pilkington European Technical Centre Hall Lane, Lathom Ormskirk, Lancashire L40 5UF Ormskirk, Lancashire L40 5UF (GB)