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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/025755
Kind Code:
Provided is a pneumatic tire in which the crack development resistance of a crossing belt layer is enhanced without deterioration in cutting resistance and partial abrasion resistance. The pneumatic tire comprises a belt which is disposed outside, in a radial direction of the tire, of a carcass 102 and which includes at least three belt layers 103 including two crossing belt layers oppositely inclined across the tire equatorial plane, wherein reinforcing materials of the crossing belt layers 103a, 103b are steel cords each having a layer twisted structure which includes a core formed of two core filaments and includes a sheath formed of eight twisted sheath filaments surrounding the core, and the amount of the steel cords in each of the crossing belt layers 103a, 103b expressed by expression (1): the diameter of the steel cord (mm) × the number of the steel cords driven (per 50 mm) (1) is 23-49.

MORI Yuriko (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
Publication Date:
February 08, 2018
Filing Date:
July 27, 2017
Export Citation:
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BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
B60C9/00; D07B1/06
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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