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Pneumatic radial tire

一种子午线轮胎、胎圈的技术，应用在充气轮胎的增强层、特殊轮胎、轮胎零部件等方向，能够解决高速耐久性降低、带束层环箍效果变弱等问题，达到高速耐久性提高的效果

Active Publication Date: 2019-06-21
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the belt reinforcement layer is constituted by two twisted composite fiber cords, there is a problem that the hooping effect on the belt layer becomes weak and the high-speed durability decreases
Therefore, it is difficult to achieve both weight reduction and high-speed durability of the tire with a belt reinforcement layer composed of two twisted composite fiber cords

Method used

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  • Pneumatic radial tire
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Examples

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example

[0041] Using the compounding ingredients shown in Table 2 as the general compounding, using a 1.7L closed-type Banbury mixer, the rubber compositions for treads (Examples 1-3, Comparative Example 1 ~4) The components other than the sulfur and the vulcanization accelerator are kneaded, and after a predetermined period of time, they are discharged from the internal mixer and cooled to room temperature. This was put into a 1.7 L closed-type Banbury mixer, and sulfur and a vulcanization accelerator were added and mixed to prepare a rubber composition for treads. It should be noted that in the diene rubber (SBR1, SBR2) column in Table 1, in addition to the compounding amount of the product, the net compounding amount of SBR excluding the oil-extending component is also described in parentheses. In addition, the compounding quantity of the compounding agent shown in Table 2 is represented by weight part with respect to 100 weight part of diene rubbers shown in Table 1.

[0042] The...

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Abstract

An object of the present invention is to provide a pneumatic radial tire that achieves both weight reduction and high-speed durability. The prime number pneumatic radial tire is characterized by having a belt reinforcing layer (7) and a tread rubber (9), and the belt reinforcing layer (7) is composed of a fiber cord of aramid and a fiber cord of aliphatic polyamide Composed of composite fiber cords (8) twisted together with fiber cords, the total fineness of the composite fiber cords (8) is 1800-3200 dtex, and the elongation when a load of 2.0 cN / dtex is applied is 3.0-4.0% , the rubber composition constituting the tread rubber (9) is prepared by blending 10 to 110 parts by weight of silica having a nitrogen adsorption specific surface area of ​​100 m2 / g or more in 100 parts by weight of diene rubber, and the loss compliance at 60°C It is below 45Pa‑1.

Description

technical field [0001] The present invention relates to a pneumatic radial tire, and more specifically, to a pneumatic radial tire in which high-speed durability has been improved to a level higher than conventional levels while achieving weight reduction. Background technique [0002] Conventionally, in order to improve the high-speed durability of pneumatic radial tires or reduce load noise, a belt reinforcement layer in which organic fiber cords are wound in the tire circumferential direction is sometimes provided on the outer peripheral side of the belt layer to provide a hoop to the belt layer. Effect. As the organic fiber cord, it has been proposed to use a three-twisted composite fiber cord composed of an aramid fiber cord and a nylon fiber cord (for example, refer to Patent Document 1). [0003] In recent years, in order to improve the fuel efficiency performance of pneumatic radial tires, hydrogenation of tire weight has been demanded. When the three twisted compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/22B60C1/00B60C9/00
CPCB60C9/22B60C1/00B60C9/00B60C9/2009B60C2009/2257B60C2009/228B60C2009/2285B60C2009/2214B60C1/0016B60C9/005B60C11/0008B60C2011/0025B60C9/0042B60C2009/0085B60C2011/0016C08L9/06D02G3/047D02G3/28D02G3/48D10B2505/022
Inventor 中岛美由纪
Owner THE YOKOHAMA RUBBER CO LTD
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