TIRE FOR HEAVY LOAD - BRIDGESTONE CORP

Title:

TIRE FOR HEAVY LOAD

Document Type and Number:

WIPO Patent Application WO/2018/105153

Kind Code:

A1

Abstract:

Provided is a tire for heavy load, which is able to have further improved durability by achieving a good balance between excellent wear resistance of a tread part and excellent cracking resistance of a belt at higher levels even in cases where the width of the belt is increased. According to the present invention, the width W3 of a third belt (16c) of a belt layer (16) that is arranged between a carcass (14) and a tread part (11) is 65-85% of the maximum tire width Wm, and the width W4 of a fourth belt (16d) of the belt layer (16) is 55-75% of the maximum tire width Wm. The metal cords used for a metal cord-rubber composite that constitutes the third belt and the fourth belt (16c, 16d) contain from 2% by atom to 60% by atom (inclusive) of N atoms in the surfaces, while having a Cu/Zn ratio of from 1 to 4 (inclusive). The rubber composition which covers the metal cords contains 1-15 parts by mass of silica and 0-1 part by mass of a cobalt-containing compound per 100 parts by mass of the rubber component.

Inventors:

SAITO NOBORU

Application Number:

PCT/JP2017/022575

Publication Date:

June 14, 2018

Filing Date:

June 19, 2017

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)

International Classes:

B60C1/00; B60C9/18; D07B1/06

Domestic Patent References:

WO2006080373A1	2006-08-03
WO2014192811A1	2014-12-04
WO2017047587A1	2017-03-23
WO2014192811A1	2014-12-04

Foreign References:

JP2005271863A	2005-10-06
US5394919A	1995-03-07
JP2016239342A	2016-12-09

Other References: