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EP 4 281 606 A1

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(43) Date of publication: 29.11.2023 Bulletin 2023/48 (21) Application number: 22742254.0 (22) Date of filing: 21.01.2022

(51) International Patent Classification (IPC):  D01G 21/00(2006.01) B03C 7/00(2006.01) D01G 5/00(2006.01) (52) Cooperative Patent Classification (CPC): D01G 5/00; D10B 2211/00; B03C 7/006; B03C 7/12; B03C 7/003; Y02W 30/66 (86) International application number: PCT/CN2022/073229 (87) International publication number: WO 2022/156775 (28.07.2022 Gazette 2022/30)

(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: 21.01.2021 US 202163199734 P 11.10.2021 CN 202111181117 (71) Applicant: The Hong Kong Research Institute of Textiles and Apparel Limited Kowloon, Hong Kong (HK)

(72) Inventors: KEH, Edwin Yee Man Hong Kong Polytechnic University, Hung Hom Kowloon, Hong Kong (HK) YAO, Lei Hong Kong Polytechnic University, Hung Hom Kowloon, Hong Kong (HK) LEUNG, Kin Ming Hong Kong Polytechnic University, Hung Hom Kowloon, Hong Kong (HK) HO, Siu Cheung Hong Kong Polytechnic University, Hung Hom Kowloon, Hong Kong (HK) SIU, Kin Sang Hong Kong Polytechnic University, Hung Hom Kowloon, Hong Kong (HK) (74) Representative: Modiano, Gabriella Diana et al Modiano & Partners (DE) Steinsdorfstrasse, 14 80538 München 80538 München (DE)