Title:
RUN-FLAT TIRE
Document Type and Number:
WIPO Patent Application WO/2011/043319
Kind Code:
A1
Abstract:
Disclosed is a run-flat tire that strikes an even higher degree of balance between run-flat durability and ride quality during normal driving situations. The run-flat tire is equipped with a reinforcing cord layer (5) that covers along a radial carcass (2) from at least a belt end to the section of a tire side section with maximum width. The cords that form the reinforcing cord layer are either nylon 66 cords, cellulose fiber cords, PET cords, PEN cords, or hybrid cords of an aramid and nylon 66, and are provided with a cord angle of less than 10° to the radial direction of the tire; wherein the elastic modulus at 25°C and under 3N load of a cord that has been pulled out from the tire is no more than 40 cN/dtex, and the heat-shrinkage stress (σ) at 177°C and the elastic modulus (E) at 177°C and under 10N load of the same satisfy the following conditions: σ+0.025E ≧ 0.36, 40 ≧ E ≧ 8, and σ ≧ 0.05.
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Inventors:
MORI Hiroyuki (3-1-1 Ogawahigashi-cho, Kodaira-sh, Tokyo 31, 〒1870031, JP)
Application Number:
JP2010/067421
Publication Date:
April 14, 2011
Filing Date:
October 05, 2010
Export Citation:
Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-k, Tokyo 40, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１丁目１０番１号 Tokyo, 〒1048340, JP)
株式会社ブリヂストン (〒40 東京都中央区京橋１丁目１０番１号 Tokyo, 〒1048340, JP)
International Classes:
B60C9/08; B60C9/00; B60C13/00; B60C15/06; B60C17/00
Attorney, Agent or Firm:
HONDA Ichiro (HONDA INTERNATIONAL PATENT & TRADEMARK OFFICE, 6th Floor Yusei Fukushi Kotohira Bldg., 14-1, Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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