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pneumatic tire

A technology for pneumatic tires and treads, which is applied to tire parts, tires, tire treads/tread patterns, etc., and can solve problems such as reduced bonding strength

Inactive Publication Date: 2016-10-26
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the rubber material of the conductive portion (d) is different from that of the cap portion (c), the bonding strength between the conductive portion (d) and the cap portion (c) tends to be small

Method used

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Examples

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Embodiment Construction

[0028] One embodiment of the present invention will be described below with reference to the drawings. like figure 1 As shown, a pneumatic tire (hereinafter, may be simply referred to as a "tire") 1 according to the present embodiment is exemplified as a tire for a passenger car. The tire 1 includes an annular carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 of the bead portion 4 , and a tread reinforcing curtain arranged radially outward of the carcass 6 in the tread portion 2 . Line layer 7. The invention can also be applied as a heavy duty tyre.

[0029] The carcass 6 includes a radial carcass ply 6A including an annular main body portion 6a and a pair of turnup portions 6b. The main body portion 6 a extends between the bead cores 5 and 5 . Each turn-up portion 6 b is turned up around the bead core 5 from the axially inner side to the axially outer side of the tire. In each bead portion 4, a radially tapered bead apex 8 is arran...

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PUM

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Abstract

A pneumatic tire configured to prevent a tread cap and a conductive portion forming tread rubber from separating from each other and to smoothly discharge static electricity in a vehicle body. A pneumatic tire (1) is provided with a tread rubber (2G) including a tread running surface (11) forming a tread surface (2A), and further including a conductive portion (12), the conductive portion (12 ) has one end exposed at the tread surface (2A) and the other end in electrical communication with the rim when the tire is mounted to the rim. The conductive part (12) includes a wound strip body formed by helically winding and stacking a rubber strip (14). The rubber strips (14) include wide strips (15) having electrical conductivity and a large width, and narrow strips (16) having a smaller width than the wide strips (15) and extending along the tire The radial direction is arranged on the outside of the wide strip (15). The rubber material of the narrow strip (16) is the same as that of the tread cap (11) adhered to the narrow strip (16).

Description

technical field [0001] The present invention relates to a pneumatic tire that can effectively discharge static electricity accumulated in a vehicle body while preventing separation between a conductive portion in a tread rubber and a cap rubber. Background technique [0002] Generally, pneumatic tires include tread rubber that is non-conductive. This can generate static electricity in the vehicle body, which can then cause radio interference, such as radio noise. For example, if Figure 7 As shown, there is proposed a pneumatic tire (t) having a tread portion (tr) including a tread portion (c) having non-conductivity and a conductive portion (d). The tread surface (c) includes a tread surface (ta) in contact with the ground. The conductive part (d) includes one end exposed at the tread surface (ta) and the other end connected to a conductive tire element (e) which is in electrical communication with the rim when the tire is mounted on the rim. Pneumatic tires (t) can disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C19/08
CPCB60C19/082B29D2030/526B60C2011/0091
Inventor 小原圭
Owner SUMITOMO RUBBER IND LTD
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