Patent ID: 11874223
Assignee: THE GOODYEAR TIRE & RUBBER COMPANY
Field: Measurement (Instruments)
Classification: CPC B  G | IPC G

Claim 10:
11. A method for characterizing a multi-layered tire tread, the method comprising:
providing a first rubber composition having a first initial refractive index;
providing a second rubber composition having a second initial refractive index;
adding a refractive index modifier to the first rubber composition, the first rubber composition thereby having a first refractive index greater or lower than the first initial refractive index, and/or to the second rubber composition, the second rubber composition thereby having a second refractive index greater or lower than the second initial refractive index, so that a difference between the first refractive index and the second refractive index is greater than, or equal to, a threshold refractive index;
producing a multi-layered tire tread comprising a first layer comprising the first rubber composition and also comprising a second layer comprising the second rubber composition, the first rubber composition and/or the second rubber composition comprising the added refractive index modifier in case the refractive index modifier is added;
irradiating the multi-layered tire tread with a THz electromagnetic radiation; and
receiving radiation transmitted through the multi-layered tire tread and/or radiation reflected by the multi-layered tire tread.