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Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in the direction of special tires, tire parts, tire tread/tread pattern, etc., can solve the problems of wear resistance, durability reduction, difficulty in balancing, and deterioration of rolling characteristics, etc. Achieves the effect of maintaining durability, good physical properties, and a good balance of physical properties

Active Publication Date: 2020-09-11
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in such a fit, there is concern about deterioration of rolling characteristics
Therefore, it has also been proposed to improve rolling properties by blending silica instead of carbon black, but when the blending ratio of silica is high, wear resistance and durability may decrease, and there is a problem that it is difficult to balance these properties. question

Method used

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Examples

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Effect test

Embodiment

[0040] 23 kinds of rubber compositions for treads (Standard Example 1, Comparative Examples 1 to 7, and Examples 1 to 15) composed of the compounds shown in Tables 1 to 3 were weighed for the compounded components except the vulcanization accelerator and sulfur, It was kneaded for 5 minutes with a 1.7L closed Banbury mixer, and the masterbatch was released at a temperature of 150° C. and cooled at room temperature. Then, this masterbatch was supplied to the same 1.7 L closed-type Banbury mixer, and a vulcanization accelerator and sulfur were added and mixed for 2 minutes to prepare a rubber composition for treads.

[0041] In addition, in Tables 1-3, the compounding quantity of SBR1-3 describes the compounding quantity of the substantial rubber component after the oil content of an oil-extended product was removed. In addition, in the column of aromatic oil, the total amount including the aromatic oil compounded in the tread rubber composition and the oil for oil extension in ...

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Abstract

Provided is a pneumatic tire that can improve wear resistance, low rolling performance, and wet road surface steering stability without sacrificing durability. A pneumatic tire that comprises a treadpart (1) and a main groove (21). The groove depth of the main groove (21) is 7-11 mm. The tread part (1) is constituted by a tread rubber composition that includes, as rubber components, natural rubber, a styrene butadiene rubber, and a butadiene rubber, the average glass transition temperature Tg of the rubber components being no greater than -50 DEG C. The tread rubber composition also includes50-100 parts by mass of silica per 100 parts by mass of the rubber components, the amount of silica being at least 80 mass% of the total amount of silica and carbon black. The tread rubber compositionalso includes no more than 40 mass% of an aromatic oil relative to the amount of silica.

Description

technical field [0001] The present invention relates to a pneumatic tire having main grooves extending in the tire circumferential direction on the surface of a tread portion. Background technique [0002] In recent years, with regard to rubber compositions constituting pneumatic tires, it has been proposed to achieve improvements in wear resistance, low fuel consumption (low rolling performance), handling stability on wet roads (wet road performance), and tire weight. Various countermeasures to alleviate the problem and to balance these performances in a high dimension (for example, refer to Patent Document 1). In general, among these properties, it is known that wear resistance can be improved by, for example, blending a large amount of carbon black in a rubber composition for a tread constituting a tread portion of a pneumatic tire. However, in such a fit, there is concern about deterioration of rolling characteristics. Therefore, it has also been proposed to improve ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00C08K3/04C08K3/36C08L7/00C08L9/00C08L91/00
CPCC08L7/00C08L9/00C08K2201/006B60C11/0304B60C11/04B60C2011/0381B60C2011/0383B60C11/0306B60C1/0016B60C2011/0355B60C2011/0348C08L91/00Y02T10/86B60C11/03B60C2011/0341C08F136/06C08K3/04C08K3/36C08L9/06B60C11/033B60C2011/0025
Inventor 冈美幸
Owner THE YOKOHAMA RUBBER CO LTD
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