TIRE - BRIDGESTONE CORP

Title:

TIRE

Document Type and Number:

WIPO Patent Application WO/2015/159633

Kind Code:

A1

Abstract:

Provided is a tire such that both tire weight reduction and high durability can be achieved by establishing a technology for ensuring a sufficient effect of preventing diameter growth even when the amount of steel used in a belt layer is decreased. The tire is provided with: two or more layers of crossing belt layers (4) comprising rubberized layers of steel cords extending at an angle of 10°to 30°with respect to the tire equatorial plane, the rubberized layers being disposed with the cord directions intersecting each other; and a high-angle belt layer (3) comprising a rubberized layer of steel cords extending at an angle which is 5° or more greater than the angle of the crossing belt layers. The mass of the steel cords per unit area included in the high-angle belt layer is 85% or less of the mass per unit area of the steel cords included in the crossing belt layers, and the compressive rigidity per unit area in a cross section orthogonal to the longitudinal direction of the steel cords of the high-angle belt layer is greater than the compressive rigidity per unit area in a cross section orthogonal to the longitudinal direction of the steel cords of the crossing belt layer.

Inventors:

ONUKI ATSUSHI (JP)

Application Number:

PCT/JP2015/057980

Publication Date:

October 22, 2015

Filing Date:

March 18, 2015

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)

International Classes:

B60C9/18; B60C9/00; B60C9/20; D07B1/06

Foreign References:

JP2010089725A	2010-04-22
JPH07242102A	1995-09-19
JP2008120349A	2008-05-29
JP2001328407A	2001-11-27

Other References: