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Pneumatic tire

A technology of pneumatic tires and tires, which is applied in the directions of pneumatic tires, reinforcement layers of pneumatic tires, tire parts, etc., to achieve the effect of excellent driving durability

Inactive Publication Date: 2013-07-10
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, the above-mentioned phenomenon in which the film 2 mainly composed of thermoplastic resin and the belt-shaped rubber sheet 3 vulcanized and bonded to the film 2 is peeled off is particularly caused by the film 2 mainly composed of thermoplastic resin shown in FIG. 5( b ). The film 2 is exposed and peeled off near its front end 4, etc., a crack occurs first, and further develops to the peeling of the sheet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11~17

[0128] Embodiment 11~17, existing example 11

[0129] Examples 11 to 17 and Conventional Example 11 relate to the pneumatic tire of the second present invention.

[0130] As test tires, each of Examples 11 to 17 and Comparative Example 11 produced ten test tires with a structure of two belt layers and two carcass layers, and the tire size was 195 / 65R1591H (15×6J). .

[0131] In each of the test tires, a film having a thermoplastic resin of N6 / 66 and having a thickness of 130 μm was used as a film mainly composed of a thermoplastic resin to form an inner liner.

[0132] The films of Examples 11 to 17 were each cut into a desired length×width, and laser treatment was repeatedly performed along the tire width direction on both ends of the tire circumferential direction to make it into the thin film shown in Table 2. thickness of. Conventional Example 11 is a film in which no thin portion is specially provided.

[0133] For each seam S, the length (Lmm) of the seam, the side c...

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Abstract

The invention provides a pneumatic tire in which an inner liner including a film mainly made of thermoplastic resin is attached to an inside of the tire via a tie rubber sheet, on an inner side of a carcass layer, and which has a lap-splice portion where end portions of the film in a tire circumferential direction overlap each other in a tire widthwise direction with tie rubber therebetween. A section of the film on a tire cavity side in the lap-splice portion has a portion where the film is thin over part or entirety of the width in the tire widthwise direction before the lap-splice portion, or a film thickness in the lap-splice portion is smaller than a film thickness in a portion other than the lap-splice portion. Thus, the pneumatic tire has no crack developing around the lap-splice portion of an inner liner layer after running, and has excellent durability.

Description

technical field [0001] The present invention relates to pneumatic tires. [0002] More specifically, it relates to a pneumatic tire in which an inner liner layer composed of a film mainly composed of a thermoplastic resin is attached to the tire inside a carcass layer through a strip-shaped rubber sheet, and has a tire circumferential direction of the film. The ends of the pneumatic tire pass through the spliced ​​portion where the band-shaped rubber overlaps over the entire width of the tire. After the start of running, the pneumatic tire has excellent durability without cracks near the spliced ​​portion of the spliced ​​inner liner. Background technique [0003] In recent years, it has been proposed and studied to use a film mainly composed of a thermoplastic resin for an inner liner of a pneumatic tire (Patent Document 1). [0004] In actual use of the thermoplastic resin-based film in the inner liner of a pneumatic tire, the following production method is generally empl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/02B60C9/18
CPCB60C2005/145B60C2005/147Y10T152/10495B60C5/14B60C19/00
Inventor 小石川佳史
Owner THE YOKOHAMA RUBBER CO LTD
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