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US 12,179,390 B2Granted
Pneumatic tire and method of manufacturing the same
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTakashi Hoshiba, Masahiro Naruse
Life of this patent
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Abstract
A pneumatic tire is vulcanized by using a bladder provided with a coating layer formed by a release agent, and the release agent has a thickness, detected by an electron microscope, of 0.1 μm to 100 μm on an inner surface of a tread portion 1.
Claims12
A method for manufacturing a pneumatic tire, the method comprising:
- vulcanizing a green tire using a bladder having a coating layer formed by a release agent, and partially transferring the release agent from the bladder to form a transfer layer on an inner surface of a tread portion of the pneumatic tire after the vulcanizing such that a portion of the release agent remains on the bladder, wherein the release agent of the transfer layer has a thickness, detected by an electron microscope, of 0.1 μm to 100 μm on the inner surface of the tread portion of the pneumatic tire after the vulcanization, wherein the release agent of the transfer layer is dispersed on the inner surface of the tread portion of the pneumatic tire after the vulcanization such that the release agent is not provided on an entire surface of the inner surface.
A method for manufacturing a pneumatic tire, the method comprising:
- vulcanizing a green tire using a bladder having a coating layer formed by a release agent, and partially transferring the release agent from the bladder to form a transfer layer on an inner surface of a tread portion of the pneumatic tire after the vulcanizing such that a portion of the release agent remains on the bladder, wherein an amount of silicon in the release agent of the transfer layer detected by X-ray fluorescence analysis is 0.1 wt. % to 10.0 wt. % on the inner surface of the tread portion of the pneumatic tire after the vulcanization, wherein the release agent of the transfer layer is dispersed on the inner surface of the tread portion of the pneumatic tire after the vulcanization such that the release agent is not provided on an entire surface of the inner surface.
Dependencies are inferred from the claim text.