Unlock instant, AI-driven research and patent intelligence for your innovation.

Pneumatic tire

一种充气轮胎、轮胎的技术，应用在轮胎零部件、轮胎胎面/胎面花纹、运输和包装等方向，能够解决导电性橡胶与泡沫橡胶不均匀磨损、电阻高、积蓄静电等问题，达到抑制不均匀磨损、改进抗不均匀磨损性的效果

Inactive Publication Date: 2009-12-02
BRIDGESTONE CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tread rubber mixed with silica has a problem that its electrical resistance is higher than that of the tread rubber compounded only with carbon black, and static electricity generated by internal friction when the rubber deforms, etc., accumulates.
[0006] However, in general, non-foamed rubber has higher wear resistance than foamed rubber. Therefore, when non-foamed rubber is used as the conductive rubber as described above, there is a problem that only a part of the conductive rubber remains after the tread is worn, and the Uneven wear between residual conductive rubber and foam rubber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0032] figure 1 The tread portion 12 of the pneumatic tire 10 according to the present embodiment shown has a so-called crown and subtread structure, that is, a crown on the tread contact surface 12A side is superimposed on the outer periphery of the tread base portion 18 on the inner side in the tire radial direction. 16, and non-foamed rubber is disposed in the base tread 18.

[0033] The crown portion 16 is provided with a foam rubber in which, for example, 50 parts by weight or more of a white filler is mixed with 100 parts by weight of the rubber component of the foam rubber having a foaming rate of 2% or more. A material in which 90% or more of the white filler is mixed with the total amount of the filler can be used, but is not limited thereto. As a white filler, silica, aluminum hydroxide, etc. are mentioned, for example. The electrical conductivity of the crown portion 16 is lower than that of rubber in which the amount of the white filler compounded is 50 parts by ...

no. 2 Embodiment approach

[0048] exist figure 2 Among them, in the pneumatic tire 20 of the present embodiment, the foam rubber conductive layer 14 is arranged from the base tread 18 toward the tread contact surface 12A, and is inclined in the tire width direction with respect to the normal direction of the tread contact surface 12A.

[0049] Since the other parts are the same as those of the first embodiment, the same reference numerals are assigned to the same parts in the drawings, and description thereof will be omitted.

[0050] effect

[0051] In the pneumatic tire 20, the foam rubber conductive layer 14 of the tread portion 12 is arranged from the tread base 18 toward the tire contact surface 12A, and is not parallel to the normal direction of the tread contact surface 12A, but is inclined in the tire width direction. As a result, when the tread contact surface 12A is viewed from above, the foam rubber conductive layer 14 occupies a constant width in the tire width direction at the tread por...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

It is an object to improve uneven wear resistance in a tread portion in a pneumatic tire having conductive rubber arranged in a part of the tread portion. Foamed rubber is provided in the tread portion 12 and a foamed rubber conductive layer 14 employing the foamed rubber is arranged in a part of the tread portion 12. Furthermore, uneven wear due to a difference of wear resistance between the foamed rubber conductive layer 14 and other tread rubber 22 can be suppressed by setting a foaming rate of the foamed rubber conductive layer 14 higher relative to other tread rubber portion 22.

Description

technical field [0001] The present invention relates to a pneumatic tire in which a conductive rubber layer is disposed on a part of a tread portion mainly composed of foam rubber. Background technique [0002] Conventionally, carbon black has generally been used as a reinforcing agent for tires. In recent years, in response to environmental problems, improvements in fuel consumption of motor vehicles have been demanded, and reduction of rolling resistance of tires has become a subject. As a technology to deal with this problem, a tread rubber is developed that reduces the amount of carbon black that causes hysteresis loss and contains silica as a reinforcing agent. While reducing the blending amount of carbon black, silica is blended, thereby reducing rolling resistance and improving braking force on wet road surfaces (hereinafter referred to as wet performance). However, the tread rubber mixed with silica has a problem that its electrical resistance is higher than that o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60C19/08B60C11/00
CPCB60C11/005B60C19/08B60C2011/147B60C11/00B60C11/03
Inventor 木胁幸洋
Owner BRIDGESTONE CORP