Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

pneumatic tire

A technology for pneumatic tires and tires, which is applied to the reinforcement layer, tire parts, tire edges and other directions of pneumatic tires, can solve the problem that the pneumatic tire does not give inspiration, the handling stability and durability cannot be fully improved, and the carcass cord Inability to fully utilize the characteristics of the cord, etc., to achieve the effect of excellent handling stability and durability

Active Publication Date: 2017-05-10
THE YOKOHAMA RUBBER CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the cord arrangement of such a semi-radial structure, there is a problem that, in the case of using a nylon fiber cord as the carcass cord, if the carcass cord is placed (fixed) at the time of tire molding vulcanization, etc. In the state where tension in the compression direction is applied to the carcass cord, the carcass cord cannot fully exhibit the original cord characteristics after tire molding and vulcanization, and the steering stability and durability cannot be sufficiently improved.
[0007] However, these proposed pneumatic tires are different from the so-called semi-radial structure tires targeted by the present invention, that is, tires in which the above-mentioned carcass cords are inclined relative to the tire radial direction and measured at the center position in the tread width direction. The angle of the body cord relative to the tire circumferential direction is 55-85°, which does not give any inspiration for the pneumatic tire of the present invention

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • pneumatic tire
  • pneumatic tire
  • pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0047] Examples 1-3, Conventional Examples 1-6

[0048] As test tires, five tires were produced for each of the examples and each of the comparative examples, each of which had a tire size of 225 / 50R16 92V, and were mounted on JATMA standard rims to obtain test tires.

[0049] The specifications of the carcass structure of each pneumatic radial tire of each example and each comparative example are as described in Table 1. In terms of carcass structure, it is described as the conventional method is figure 1 construction shown.

[0050] For each test tire, the handling stability, ride comfort performance, load durability performance, and tire weight were measured and evaluated by the test evaluation methods described in the following (B) to (D), and the evaluation results are shown in Table 1. .

[0051] In addition, the method for obtaining the difference in intermediate elongation at 2.0 cN / dtex between the center portion and the side portion of the carcass cord used in the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The object of the present invention is to provide a pneumatic tire, which is a pneumatic tire for racing and the like in which cords of a semi-radial structure are arranged and nylon fiber cords are used as the carcass cords, and the original nature of the nylon fiber carcass cords can be fully utilized. It has excellent cord characteristics, handling stability and durability. The pneumatic tire of the present invention is a pneumatic tire in which the carcass cord is inclined with respect to the radial direction of the tire, and the angle of the carcass cord with respect to the tire circumference measured at the central position in the tread width direction is 55 to 85. ° semi-radial structure pneumatic tire, characterized in that: the elastic modulus of the carcass cord is 3-10GPa, and the twist coefficient α of the carcass cord is 1500-2500, in this tire, the tire The difference in intermediate elongation at 2.0 cN / dtex between the center portion and the side portion of the body cord is 1.0% or less. Here, the twist coefficient N: the twist degree per 10 cm length of the fiber cord T: the fineness (dtex) of the fiber cord.

Description

technical field [0001] The present invention relates to pneumatic tires. Background technique [0002] Racing tires that require high handling stability when running at high speeds, some are formed into so-called semi-radial tires, that is, carcass cords that are inclined relative to the radial direction of the tire and measured at the center position in the tread width direction The angle with respect to the tire circumferential direction is 55° to 85°, and in this case, some carcass cords are made of nylon fiber cords. [0003] In the cord arrangement of such a semi-radial structure, there is a problem that, in the case of using a nylon fiber cord as the carcass cord, if the carcass cord is placed (fixed) at the time of tire molding vulcanization, etc. In a state where tension in the compression direction is applied to the carcass cords, the carcass cords cannot fully exhibit their original cord properties after tire molding and vulcanization, and the steering stability a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/02B60C9/00B60C9/08
CPCB60C9/06B60C2009/0466B60C2009/0433B60C15/0045B60C9/09
Inventor 中岛美由纪
Owner THE YOKOHAMA RUBBER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com