Pneumatic tire and method for manufacturing the same

A method for manufacturing a pneumatic tire comprising a plurality of sipes in a land portion formed in a tread portion, the tread portion comprising a tread rubber having a JIS hardness of from 50 to 68, and a sound absorbing member on an inner surface of the tread portion, wherein a thickness of the sound absorbing member is 31 mm or greater, a hardness of the sound absorbing member is more than 80 N/314 cm2 and 150 N/314 cm2 or less, a tensile strength of the sound absorbing member is 90 kPa or greater, and an elongation at break of the sound absorbing member is 130% or greater, the method comprising:

• vulcanizing a green tire using a bladder provided with a coating layer comprising a release agent to obtain a vulcanized pneumatic tire;
• and
• arranging an adhesive layer along a tire circumferential direction on the inner surface of the tread portion of the vulcanized pneumatic tire and fixing the sound absorbing member;
• wherein
• an amount of silicon in the release agent detected by X-ray fluorescence analysis in the fixed region of the sound absorbing member is from 0.1 wt. % to 10.0 wt. %,
• the release agent consists only of one or more selected from the group consisting of a dialkyl polysiloxane, an alkylphenyl polysiloxane, an alkylaralkyl polysiloxane, a 3,3,3-trifluoropropylmethyl polysiloxane, or combinations thereof,
• the release agent is distributed in a scattered manner on the inner surface such that the release agent is not provided on an entire surface of the inner surface, and
• a volume of the sound absorbing member is from 21% to 40% with respect to a cavity volume of the tire.

A pneumatic tire, comprising:

• a plurality of sipes in a land portion formed in a tread portion, the tread portion comprising a tread rubber having a JIS hardness of from 50 to 68;
• and
• a sound absorbing member fixed to an inner surface of the tread portion via an adhesive layer along a tire circumferential direction;
• wherein
• a thickness of the sound absorbing member is 31 mm or greater,
• a hardness of the sound absorbing member is more than 80 N/314 cm2 and 150 N/314 cm2 or less,
• a tensile strength of the sound absorbing member is 90 kPa or greater,
• an elongation at break of the sound absorbing member is from 130% or greater to 190% or less,
• an amount of silicon in a release agent between the inner surface and the adhesive layer is from 0.1 wt. % to 10.0 wt. %,
• the release agent consists only of one or more selected from the group consisting of a dialkyl polysiloxane, an alkylphenyl polysiloxane, an alkylaralkyl polysiloxane, a 3,3,3-trifluoropropylmethyl polysiloxane, or combinations thereof, and
• the release agent is distributed in a scattered manner on the inner surface such that the release agent is not provided on an entire surface of the inner surface.