公开(公告)号：EP4331821A1

公开(公告)日：2024-03-06

申请号：EP23192859.9

申请日：2023-08-23

申请人： The Goodyear Tire & Rubber Company

发明人： SCHWEITZER, Claude ,  ORLEWSKI, Pierre Felix ,  KAES, Christian ,  MELAIYE, Abdulkareem Modupe ,  FREYLINGER, Michael ,  FOURME, Sylvain ,  DELROISSE, Pauline Monique Marie-Lucie Ghislaine

IPC分类号： B29D30/52 ,  B29C48/21 ,  B29C48/92 ,  G01B11/06 ,  B29L30/00

摘要： A method and apparatus for producing or characterizing a multi-layered tire tread is disclosed. The method comprises: providing a first rubber composition (24) having a first refractive index; providing a second rubber composition (26) having a second refractive index; determining a difference between the first refractive index and the second refractive index; comparing the difference to a threshold refractive index; adding a refractive index modifier (138, 238, 338) to the first rubber composition (24) and/or to the second rubber composition (26) in case the comparison provides that difference is lower than the threshold refractive index; producing a multi-layered tire tread (10) comprising a first layer (12) comprising the first rubber composition and also comprising a second layer (14) comprising the second rubber composition; irradiating the multi-layered tire tread with a THz electromagnetic radiation; and receiving radiation transmitted and/or radiation reflected by the multi-layered tire tread.