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Tire

A tire and tread technology, applied in pneumatic tires, special tires, tire parts, etc., can solve problems such as reducing tire fuel efficiency, achieve good fuel efficiency, improve ride comfort and dry road handling performance.

Inactive Publication Date: 2019-01-11
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the fuel efficiency of the tire is lowered because the tan δ at 60° C. related to the fuel efficiency of the tire is also high, a rubber composition having a high tan δ at 0° C. is simply used in the tread rubber to improve the tire performance. Wet performance is questionable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-19 and comparative example 1-4

[0145] According to the second embodiment in JP 2012-046030 A (PTL 3), a tire frame (carcass) is produced by preparing a half body of the tire frame by injection molding using a polyamide-based thermoplastic elastomer as a resin material, The halves are placed opposite each other and joined by applying pressure at a temperature at least as high as the melting point of the polyamide-based thermoplastic elastomer used.

[0146] Next, a reinforcing layer is provided on the outer side in the tire radial direction of the tire frame by helically winding a steel cord coated with a thermoplastic elastomer in the tire circumferential direction.

[0147] Then, a tread rubber formed from the rubber compositions of the formulations shown in Tables 1 to 3 was provided on the outer side in the tire radial direction of the reinforcing layer, followed by vulcanization. Through this process, tires (pneumatic tires) are manufactured.

[0148] The manufactured tire frame had a thickness of 2 mm...

Embodiment 24-31

[0229] In the same manner as in Examples 1-19 and Comparative Examples 1-4, a tire frame (carcass) was produced, and the reinforcing layer was wound by spirally winding a steel cord covered with a thermoplastic elastomer in the tire circumferential direction. The wire is arranged on the outer side of the tire frame in the tire radial direction.

[0230] Then, a tread rubber formed from the rubber composition of the formulation shown in Table 5 was provided on the outer side in the tire radial direction of the reinforcing layer, followed by vulcanization. Through this process, tires (pneumatic tires) are manufactured.

[0231] In order to measure the organic acid content in the rubber composition used in the tread rubber, the loss tangent (tanδ) and the storage modulus (E') of the tread rubber, and the tensile strength (Tb) of the tread rubber, the aforementioned method.

[0232] The manufactured tires were evaluated by the aforementioned methods in order to evaluate fuel eff...

Embodiment 32-50 and comparative example 7-10

[0246] The tire is manufactured by manufacturing a tire frame body (carcass) mainly formed of rubber according to a standard method, and providing a reinforcing layer on the tire frame by spirally winding steel cords coated with a thermoplastic elastomer in the tire circumferential direction The outer side in the tire radial direction of the body, and further provided the tread rubber formed of the rubber compositions of the formulations shown in Tables 6-8 on the outer side in the tire radial direction of the reinforcing layer.

[0247] Note: The covering layer of the steel cord in the reinforcing layer is formed of a thermoplastic elastomer, and the percentage of the resin material therein is 100% by mass. The thermoplastic elastomer used in the covering layer of the steel cord was a product "UBESTA XPA9055X1" (polyamide-based thermoplastic elastomer) manufactured by Ube Industries, Ltd.

[0248] In order to measure the organic acid content in the rubber composition used in ...

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Abstract

The present invention provides a tire that uses a resin material and still has improved ride comfort, improved dry handling performance, and favorable fuel consumption performance, without losing wetperformance. The tire is characterized by comprising an annular tire skeleton body (10); a reinforcing layer (20) that is provided to the outside of the tire skeleton body (10) in the radial directionof the tire; and tread rubber (30) that is provided to the outside of the reinforcing layer (20) in the radial direction of the tire. The reinforcing layer (20): is a resin composition that includes50-100 mass% of a resin material; and coats a reinforcing member (21). The storage modulus (E'0 DEG C) of the tread rubber 30 at 0DEG C and a strain of 1% is 30 MPa or lower, the loss tangent (tan delta 0 DEG C) thereof at 0DEG C and a strain of 1% is 0.5 or lower, and the value (tan delta 30 DEG C-tan delta 60 DEG C) of subtracting the loss tangent (tan delta 60 DEG C) thereof at 60DEG C and a strain of 1% from the loss tangent (tan delta 30 DEG C) thereof at 30DEG C and a strain of 1% is 0.08 or lower.

Description

technical field [0001] The present disclosure relates to a tire. Background technique [0002] Due to the increasing attention to environmental issues in recent years, the demand for vehicles with lower fuel consumption continues to grow with the global movement aimed at reducing the emission of carbon dioxide. In response to such demands, it is also required to improve tire performance by reducing rolling resistance. When developing rubber compositions for use in tire treads that contribute to the rolling resistance of tires, it is generally effective to use loss Angle tangent (tan δ) was used as an index. Specifically, when a rubber composition having a low tan δ at about 60° C. is used for the tread rubber, heat generation of the tire can be suppressed, rolling resistance can be reduced, and as a result, the fuel efficiency of the tire can be improved (PTL1) . [0003] In order to enable the vehicle to run more safely, it is also important to ensure running performanc...

Claims

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Application Information

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IPC IPC(8): B60C11/00B60C1/00B60C5/01B60C9/20B60C9/22C08K3/04C08K3/36C08L7/00C08L9/00C08L101/00
CPCB60C1/0016B60C5/007B60C5/01B60C9/02B60C11/0008B60C2009/2214B60C2011/0025C08K3/04C08K3/36C08L7/00C08L9/00C08L101/00C08F236/08C08F236/20C08K5/0025C08K5/09C08L23/20C08L67/00C08L75/04C08L77/00C08L93/04C08L2207/04
Inventor 川嶋启介
Owner BRIDGESTONE CORP
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