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Pneumatic tire

A technology for pneumatic tires and bottom tires, which is applied to tire parts, tire rims, vehicle parts, etc., can solve the problems of complex manufacturing process, difficult material recycling of vulcanized rubber, and increased manufacturing costs, so as to improve the durability of the bead, improve the The effect of increased recyclability and adhesion

Active Publication Date: 2021-10-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vulcanized rubber has the problem of difficult material recycling
In addition, the use of cord materials, especially carcass cords, has the problems of complicating the manufacturing process and increasing manufacturing costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] In order to confirm the effect of the present invention, according to the specification trial production of table 1 has figure 1 Passenger car tires (195 / 65R15) of the construction shown. Then, the rim assembly performance, fitting performance (fitting force of the bead portion to the rim) and productivity of each trial tire were tested.

[0077] In Comparative Example 1, the structure was substantially the same as that of the Example except that the bead core was a core formed of steel cords. In addition, in Examples 1 to 6, fillers made of glass fibers were added to the bead cores.

[0078]

[0079] The presence or absence and degree of damage such as cracks in the bead portion when the tire was assembled to the rim by the automatic rim assembly machine were visually checked. Based on these inspection results, the rim assemblability was evaluated in 10 grades. The larger the index value, the better the rim assembly property.

[0080]

[0081] The Hofmann fitti...

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PUM

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Abstract

This pneumatic tire makes it possible to improve production efficiency while ensuring engagement with a rim, and to increase material recyclability. A pair of bead parts 5 are each configured by an annular bead core 10 comprising a thermoplastic resin, and a bead core coating part 20 comprising a thermoplastic resin.

Description

technical field [0001] The present invention relates to a pneumatic tire having a bead portion having a bead core made of a thermoplastic resin. Background technique [0002] In conventional pneumatic tires, the basic characteristics of the tire can be secured by using cord materials such as vulcanized rubber and organic fibers or steel fibers. However, vulcanized rubber has a problem that material recycling is difficult. In addition, the use of cord materials, particularly carcass cords, complicates the manufacturing process and increases manufacturing costs. [0003] Therefore, in Patent Document 1 below, a carcassless tire is proposed in which a tire frame member is formed of a thermoplastic resin. The tire frame member includes a pair of bead portions, a pair of sidewall portions extending from the pair of bead portions, and a crown portion connecting the pair of sidewall portions. [0004] [Prior art literature] [0005] [Patent Document] [0006] Patent Document 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/06
CPCB60C15/06B60C15/0603B60C2015/0614B60C2015/042B60C15/00B60C5/01C08L21/00B60C5/007B60C15/04
Inventor 安藤宽太
Owner SUMITOMO RUBBER IND LTD
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