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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, rolling resistance optimization, road transportation emission reduction, etc., can solve the problems of low rolling resistance and safety, and achieve the effects of reducing rolling resistance, improving safety, and preventing static electricity accumulation

Active Publication Date: 2008-12-17
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the methods of the above-mentioned Patent Documents 1 to 4, there is still room for improvement in order to simultaneously achieve sufficiently satisfactory low rolling resistance and high safety levels.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0044] The structure of the pneumatic tire of the present invention is, for example, figure 1 The upper right half of the tire section is illustrated. The tire 1 has: a tread rubber 7 constituting a tread, a sidewall rubber 8 constituting a pair of sidewalls extending inwardly in the tire radial direction from both ends thereof, and a lap joint forming a lap joint portion located at the inner end of each sidewall. The part rubber 3, and the chafer rubber 2 that constitutes the chafer cloth located on the upper part of the rim. In addition, a carcass 10 is bridged between the clinch portion and the chafer, and at the same time, a buffer layer rubber 9 constituting a buffer layer is provided on the outer side of the carcass 10 in the tire radial direction. The carcass 10 is formed of one or more carcass plies on which a carcass cord is arranged, and the carcass plies pass from the tread through the sidewalls to the bead core 13 and from the upper end of the bead core 13 to the ...

Embodiment approach 2

[0082] The structure of the pneumatic tire of the present invention is, for example, figure 2 The right half of the tire section is shown. The tire 1 has: a tread rubber 7 constituting a tread, a sidewall rubber 8 constituting a pair of sidewalls extending inwardly in the tire radial direction from both ends thereof, and a lap joint forming a lap joint portion located at the inner end of each sidewall. The part rubber 3, and the chafer rubber 2 that constitutes the chafer cloth located on the upper part of the rim. In addition, a carcass 10 is bridged between the beads on both sides, and at the same time, a buffer layer rubber 9 constituting a buffer layer is provided on the outer side of the carcass 10 in the tire radial direction.

[0083] The carcass 10 is formed of one or more carcass plies on which a carcass cord is arranged, and the carcass plies pass from the tread through the sidewalls to the bead core 13 and from the upper end of the bead core 13 to the tire. The p...

Embodiment approach 3

[0096] The structure of the pneumatic tire according to Embodiment 3 of the present invention is, for example, image 3 The right half of the tire section is illustrated. image 3 Among them, the pneumatic tire T has: a tread 31, a breaker layer 32, a sidewall 33, and a bead 34, and a non-connected tire belt 38 arranged outside the breaker layer, and a pair of bead cores 35 are folded and fixed at both ends. The carcass 37 and the triangular tape 36 extending from the upper side of the bead core 35 toward the sidewall 33. Especially in the present invention, the global conductive rubber 39 is provided between the carcass 37 and the side rubber, and between the breaker layer 32 and the tread 31 . Its upper end is connected to the conductive rubber 311 embedded in the tread 31 and exposed to the ground contact surface, and its lower end is connected to the clinch rubber 310 formed on the bead 34 .

[0097] By adopting the above structure, the static electricity generated by th...

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Abstract

A pneumatic tire capable of reducing rolling resistance and discharging static electricity generated during running, wherein each of a tread rubber, a breaker rubber, and a sidewall rubber formed on the tread part, the breaker part, and the sidewall part, respectively, has a volume specific resistivity of 1x10<8> Omega.cm or more, the pneumatic tire further including a conduction rubber embedded in the tread part so as to be at least partially exposed to a surface of the tread part, bead part rubber disposed at a region contacting a rim flange of the bead part, and electroconductive rubber electrically connecting the conduction rubber to the beat part rubber, wherein each of the conduction rubber, the bead part rubber, and the electroconductive rubber has a volume specific resistivity of less than 1x10<8> Omega.cm.

Description

technical field [0001] The present invention relates to a pneumatic tire in which rolling resistance is suppressed to be low, static electricity is reduced when the tire is running, and safety is improved. Background technique [0002] In recent years, in order to reduce the rolling resistance of tires while maintaining wet skid resistance, various methods of using silica also in tires such as treads, breakers, and sidewalls have been proposed. However, if a large amount of silica is added, the resistance of the tire will increase. For example, when refueling a vehicle, sparks generated by static electricity may sometimes cause the fuel to ignite, and there is a problem of lack of safety during use. Therefore, it is required to provide a tire that can prevent static electricity generation while reducing rolling resistance and maintaining wet skid resistance. [0003] Japanese Patent Laid-Open Publication No. 8-230407 proposes a pneumatic tire that can improve electrical con...

Claims

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Application Information

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IPC IPC(8): B60C19/08
CPCB60C19/08Y02T10/86
Inventor 国泽铁也中寺惠一饭塚融和田孝雄宫崎真一松尾俊朗
Owner SUMITOMO RUBBER IND LTD
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