(19)

(11)

EP 4 544 211 A1

(12)

(43) Date of publication: 30.04.2025 Bulletin 2025/18 (21) Application number: 23733972.6 (22) Date of filing: 20.06.2023

(51) International Patent Classification (IPC):  F16L 11/08(2006.01) B32B 1/08(2006.01) (52) Cooperative Patent Classification (CPC): B32B 1/08; F16L 11/082; B32B 2307/536; B32B 2307/7376; B32B 2274/00; B32B 15/02; B32B 15/18; B32B 27/08; B32B 27/12; B32B 2262/0276; B32B 2262/0269; B32B 2597/00 (86) International application number: PCT/EP2023/066709 (87) International publication number: WO 2023/247583 (28.12.2023 Gazette 2023/52)

(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: 24.06.2022 CN 202210726404 (71) Applicant: ContiTech Deutschland GmbH 30175 Hannover (DE)

(72) Inventors: YU, Jenny Zhaoxia Shanghai 200082 (CN) CHEN, Hua Changshu 215500 (CN) YU, Vincent Shanghai 200082 (CN) SHI, Shengyong Changshu 215500 (CN) ZHANG, Ying Yanzhou 272100 (CN) BROOKES, John Anthony Shanghai 200082 (CN) JIA, Lihua Yanzhou 272100 (CN) ZHANG, Yonghao Yanzhou 272100 (CN) YAN, Wei Qingdao 266042 (CN) (74) Representative: Continental Corporation  c/o Continental AG Intellectual Property Postfach 169 30001 Hannover 30001 Hannover (DE)