Pneumatic tire

A pneumatic tire, tire circumferential technology, applied to the reinforcement layer of pneumatic tires, tire parts, textiles and papermaking, etc., can solve the problems of difficult to ensure high-speed durability, reduced adhesion durability, etc., to ensure the rigidity of the cord , High-speed durability improvement, weight reduction effect

Active Publication Date: 2022-04-12
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a low-denier PET fiber cord is simply used in the existing structure, there is a problem that the adhesion durability is reduced and it is difficult to ensure high-speed durability

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] The tires of Conventional Example 1, Comparative Examples 1-4, and Examples 1-10 under different conditions as shown in Tables 1-2 were manufactured. The conditions are as follows: the tire size is 195 / 65R15, with figure 1 The basic structure shown, the single fineness of the organic fiber cord constituting the belt cover layer, the number of undertwisted yarns constituting the organic fiber cord (number of twists), and the beating density of the organic fiber cord in the belt cover layer (count), layer thickness G of the belt cover layer, cord diameter D of the organic fiber cord, cord spacing S between organic fiber cords adjacent in the tire width direction in the belt cover layer, layer thickness The ratio G / D of G to the cord diameter D, the ratio S / D of the cord spacing S to the cord diameter D, the number of twists of the organic fiber cord, and the middle of the 2.0 LN / dtex load of the organic fiber cord Elongation.

[0034] In each example, the belt covering l...

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Abstract

Provided is a pneumatic tire which, when a PET fiber cord is used in a belt cover layer, can exhibit satisfactory high-speed durability while reducing the weight of the tire. A belt cover layer (8) is provided on the outer peripheral side of a belt layer (7) in a tread section (1), said belt cover layer (8) comprising organic fiber cords (8C) wound in a spiral shape in the circumferential direction of the tire, said organic fiber cords (8C) being polyethylene terephthalate fiber cords having a single fineness of 700 dtex or less and a twist number of 30 times / 100 mm or more. The layer thickness (G) of the belt cover layer is 1.6 times or more of the cord diameter (D) of the organic fiber cords (8C).

Description

technical field [0001] The present invention relates to a pneumatic tire using polyethylene terephthalate (PET) fiber cords for a belt cover. Background technique [0002] Pneumatic tires for passenger cars or light trucks generally have a structure in which a carcass is laid between a pair of bead parts, and a multilayer belt layer is provided on the outer peripheral side of the carcass layer in the tread part. A belt covering layer including a plurality of organic fiber cords wound helically in the tire circumferential direction is provided on the outer peripheral side. In this structure, the belt cover mainly contributes to the improvement of high-speed durability. [0003] In the past, nylon fiber cords were the mainstream of organic fiber cords used for belt coverings, but a method using polyethylene terephthalate fiber cords that are more elastic and less expensive than nylon fiber cords has been proposed (hereinafter referred to as PET fiber cord) (for example, refe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/22B60C9/00D02G3/48
CPCD02G3/48B60C9/2009B60C9/0042B60C2009/0092B60C2009/0071B60C9/2204B60C2009/2247B60C2009/2257B60C2009/228B60C2009/2285B60C2009/2266B60C2009/2038B60C9/2003B60C2009/2067B60C2009/2077B60C2009/2093B60C2009/2096
Inventor 松本纱葵子
Owner THE YOKOHAMA RUBBER CO LTD
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