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Pneumatic radial tire and process for producing retreaded tire

A technology for radial tires and treads, applied to tire treads/tread patterns, tire parts, tires, etc., can solve problems such as long time and different time required, and achieve improved productivity, good productivity, and restraint Effect of Oxidation Deterioration

Inactive Publication Date: 2011-04-20
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the degree of tread wear of used tires is different for each tire, the time required for the buffing process for obtaining green tires also varies and takes a long time

Method used

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  • Pneumatic radial tire and process for producing retreaded tire
  • Pneumatic radial tire and process for producing retreaded tire
  • Pneumatic radial tire and process for producing retreaded tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] In the retreading process of waste pneumatic radial tires with a tire size of 11R22.5, a gauge under the tread groove of 5mm, and a residual groove of 3mm after wear, the position 3mm above the belt layer will be made of nylon 6 A thermoplastic film layer 9 (thickness: 100 μm) formed of a thermoplastic elastomer composition of / 66 and Br-IPMS is arranged between the rubber layer 7 on the belt side with a thickness of 3 mm and the rubber layer 8 on the cap side with a thickness of 4.5 mm tire (Example 1), and a conventional tire without a thermoplastic film layer 9 (Conventional Example).

[0052] In addition, the thermoplastic film layer 9 is adjacently bonded to an adhesive rubber layer (thickness: about 400 μm) on the outer peripheral side.

[0053] The above two types of tires were subjected to the retreading process by the following methods, respectively.

[0054] For the tires of the examples, the surface of the tread was heated to 160° C., and the surface of the ...

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Abstract

A pneumatic radial tire which comprises at least one carcass layer which connects right and left bead parts, a belt layer disposed on the outer periphery of the carcass layer, and a tread disposed on the outer periphery of the belt layer, wherein the tread has a layered structure comprising a tread-surface-side rubber layer, a belt-layer-side rubber layer, and a thermoplastic film layer interposed therebetween which is constituted of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer. Also provided is a process for producing a retreaded tire from the pneumatic radial tire in which the tread has worn out, the process comprising softening the thermoplastic film layer by heating, separating and removing the tread-surface-side rubber layer to form a tire casing, and then bonding a fresh tread-surface-side rubber layer to the tire casing.

Description

technical field [0001] The present invention relates to a method for manufacturing a pneumatic radial tire and a retreaded tire, and more particularly, to a pneumatic radial tire for easily manufacturing a retreaded tire after tread wear and a method for manufacturing a retreaded tire using the pneumatic radial tire. Background technique [0002] In Japan, mainly in the field of tires for trucks and buses, treads are reattached to waste tires after tread wear, and reprocessed to make retreaded tires for reuse (for example, refer to Patent Document 1, etc.). In countries other than Japan, retreaded tires are used not only for trucks and buses but also for cars. [0003] In the manufacture of such retreaded tires, excess rubber is removed by buffing until the tread surface of the used tire reaches the required height, and new tread rubber is pasted on the tire from which excess rubber has been removed as a green tire. [0004] However, since the degree of tread wear of used t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/02B29D30/54B60C11/00
CPCB60C11/00B29D2030/548B29D30/52B29D30/54B60C11/02B60C11/005Y10T152/10765Y10T152/10495
Inventor 神德孝一樱井光雄
Owner THE YOKOHAMA RUBBER CO LTD
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