Pneumatic tire

A technology of pneumatic tires and bead parts, which is applied to the reinforcement layers, tire parts, wheels, etc. of pneumatic tires, can solve the problems of reducing rolling resistance and increasing tire volume, and achieves reducing rolling resistance, reducing tire deformation, suppressing The effect of belt wrinkling

Inactive Publication Date: 2011-04-06
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the arrangement area and the number of layers of the belt reinforcing layer just to suppress belt wrinkling will increase the tire volume, and thus the rolling resistance may not necessarily be reduced even if belt wrinkling is suppressed.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

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example

[0036] Pneumatic tires of Comparative Examples 1 to 3 and Examples 1 to 9 were produced, the tire size of which was 195 / 65R15, a carcass was provided between a pair of bead parts, and two belt layers were arranged on the outer peripheral side of the carcass of the tread part, And on the outer peripheral side of these belt layers, a belt reinforcing layer formed by spirally winding a strip-shaped material including at least one fiber cord in the tire circumferential direction is arranged, wherein the belt reinforcing layer is composed of The central reinforcement layer and the edge reinforcement layer are composed, and the widths of the central reinforcement layer and the edge reinforcement layer are set as shown in Table 1 and Table 2, and the fiber cords of the central reinforcement layer and the edge reinforcement layer are taken out from the tire. The shrinkage rate, the material of the fiber cords of the central reinforcement layer and the edge reinforcement layer, the widt...

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Abstract

The invention provides a pneumatic tire which effectively reduces rolling resistance. A pneumatic tire including a carcass layer (4) mounted between a pair of bead portions (3, 3), at least two layers of a belt layer (7) disposed on an outer circumferential side of the carcass layer (4) corresponding to a tread portion (1), and a belt reinforcing layer (8) having a strip material including at least one fiber cord wrapped spirally in a tire circumferential direction on an outer circumferential side of the belt layers, wherein the belt reinforcing layer (8) has a center portion reinforcing layer (8a) for reinforcing a center portion of the belt layers (7) and edge portion reinforcing layers (8b) for reinforcing edge portions of the belt layers (7), the center portion reinforcing layer (8a) and the edge portion reinforcing layers (8b) are mutually separated, a width Wa of the center portion reinforcing layer (8a) is from 5% to 25% of a width of a belt layer (7) having a smallest width, and a width of the edge portion reinforcing layers (8b) is from 10% to 35% of the width of the belt layer (7) having the smallest width.

Description

technical field [0001] The present invention relates to a pneumatic tire having a belt reinforcement layer formed by spirally winding a strip-shaped material containing at least A fiber cord. More specifically, the present invention relates to a pneumatic tire capable of effectively reducing rolling resistance. Background technique [0002] At present, in the industry, a belt reinforcement layer formed by spirally winding a strip-shaped material containing organic fibers such as nylon fiber cords is arranged on the outer peripheral side of the belt layer of the tread portion of a pneumatic tire. cord. It is known that by providing such a belt reinforcing layer on the outer peripheral side of the belt, buckling of the belt due to centrifugal force during high-speed running can be reduced and high-speed durability can be improved (for example, refer to Patent Document 1). [0003] In recent years, however, increased awareness of environmental protection has required reductio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/08B60C9/18
CPCB60C2009/2219B60C2009/2223B60C9/2204B60C2009/2295Y10T152/10765
Inventor 濑户秀树花田亮治
Owner THE YOKOHAMA RUBBER CO LTD
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