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Radial tires for two-wheeled vehicles

A radial tire and vehicle technology, applied in motorcycle tires, special tires, vehicle parts, etc., can solve the problems of increased tread temperature, excessive tread temperature, and inability to fully utilize grip, and reduce excessive deformation.

Inactive Publication Date: 2016-04-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, an increase in the temperature of the road surface in summer causes an excessive increase in the temperature of the tread, which may soften the tread
In this case, there is a problem of excessive deformation of the tread surface and the grip cannot be fully utilized
[0005] Similarly, when running for a long time in an endurance race, etc., due to heat generation, the temperature of the tread increases excessively, so that the grip is sometimes not fully exerted

Method used

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  • Radial tires for two-wheeled vehicles
  • Radial tires for two-wheeled vehicles
  • Radial tires for two-wheeled vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A radial tire (size: 180 / 55ZR17) for two-wheeled vehicles was obtained, having Figure 5 The basic structure shown in and a detailed description shown in Table 1 below. In the production of tires, a first strip formed of a first rubber composition to form the main body and a second strip are helically wound alternately to form the tread Formed from a second rubber composition so as to form the support portion. The thickness t1 of the first strip is 2.0 mm and the thickness t2 of the second strip is 1.5 mm. Therefore, the ratio t2 / t1 of the thickness t2 to the thickness t1 is 0.75. The tread thus formed comprises a main body and a plurality of supports arranged axially relative to one another. Each support portion is inclined axially outward and radially from the inner side toward the outer side. This state is indicated by an "X" in the cell for the tilt direction in the table. The inclination angle α of each support portion is 20 degrees. The supporting portion is...

Embodiment 2-7

[0087] Tires were each obtained so as to have the same structure as the tire in Example 1 except that the thickness t1 and thickness t2 were different from those in Example 1, and the ratio t2 / t1 was shown in Table 1 and Table 2 below.

Embodiment 8-13 and comparative example 2

[0089] Tires were each obtained so as to have the same structure as the tire in Example 1, except that the complex elastic modulus E2* of the support portion was different from that in Example 1, and the ratios E2* / E1* were shown in Table 2 and Table 3 below middle.

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Abstract

The tire (2) includes a tread (4), the outer surface of which forms a tread surface (20). The tread (4) includes a main body (28) formed of a first rubber composition and a plurality of support portions (30) formed of a second rubber composition, and the support portions are axially arranged with each other. Each of the plurality of supports (30) extends from the inside of the tread (4) toward the tread surface (20). The support portion (30) is formed to be embedded in the main body (28). The complex elastic modulus E2* of the support part (30) is larger than the complex elastic modulus E1* of the main body (28). The tread (4) is formed by a first strip and a second strip that are spirally wound alternately.

Description

[0001] This application claims the priority of Patent Document No. 2011-41171 filed in Japan on February 28, 2011. The entire content of this Japanese patent application is incorporated herein by reference. technical field [0002] The present invention relates to radial tires for two-wheeled vehicles. Background technique [0003] From the standpoint of improving productivity, in tire production methods that have been used, a strip formed of uncrosslinked rubber is helically wound to form components such as treads, sidewalls, and the like. This production method may be referred to as a tape winding method. An example of this production method is disclosed in JP2009-39883. [0004] Crosslinked rubbers with increased energy loss and low complex modulus of elasticity are sometimes used in tire treads in view of improved grip. In this tread, heat generation is increased due to deformation, so that the tread may be heated during running. Therefore, an increase in the tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C1/00B29D30/60
CPCB60C11/00B60C2200/10B60C11/0058B60C2011/0025B60C11/005B60C11/0075Y10T152/10495
Inventor 原宪悟
Owner SUMITOMO RUBBER IND LTD
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