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Method for manufacturing a waterproof layer used in the composition of a tyre

An air liner and tire technology, which is applied to the reinforcement layer, tire parts, tires and other directions of pneumatic tires, can solve the problems of increasing the cost of composite air liner, not forming, and complicated operation.

Pending Publication Date: 2021-12-10
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, a membrane positioned in this manner would not form a barrier that would effectively reduce or prevent gas diffusion through the tire
[0018] Finally, the operation of arranging a large number of film fragments in an elastomeric matrix is ​​complicated and thus increases the cost of manufacturing a composite innerliner

Method used

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  • Method for manufacturing a waterproof layer used in the composition of a tyre
  • Method for manufacturing a waterproof layer used in the composition of a tyre
  • Method for manufacturing a waterproof layer used in the composition of a tyre

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Embodiment Construction

[0056] In the various figures, identical or similar elements bear the same reference signs. Therefore it will not be systematically repeated.

[0057] The airtight layer 20 comprises a corrugated film 21 made of thermoplastic material and a matrix 22 made of elastomeric material. The film is encapsulated in the matrix.

[0058] The expression "coated in a matrix" means the state of the film after the coating step, said film being surrounded on both sides by the elastomeric material.

[0059] figure 1 A corrugated film 21 for the composition of the airtight layer 20 according to the invention is shown. The membrane has a series of corrugations 23 consisting of alternating circular indentations and protrusions.

[0060] In a simplified configuration in which the corrugated membrane 21 is arranged on a flat surface, the corrugations continue along a direction called corrugation direction 24 and extend along generatrix lines 25 perpendicular to the corrugation direction. The ...

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Abstract

A method for manufacturing a composite waterproof layer (20) used in the composition of a tyre (30). According to the method, a film (21) made of a thermoplastic material is heated in such a way that the film is plastically deformable; the film is deformed (120) using corrugation means, the thickness of the film (21) being within a range of from 0.01 to 0.2 mm, and the film comprising corrugations of pitch and amplitude selected in a range of from 0.1 to 10 mm so as to give the film a defined elongation capacity; the film is cooled in such a way that the corrugated film is no longer plastically deformable; the corrugated film is coated in a matrix (22) of an elastomeric material so as to form the composite waterproof layer (20).

Description

technical field [0001] The invention belongs to the field of tire manufacturing, and more particularly relates to a method for manufacturing an inner liner for tire composition. Background technique [0002] The tire is divided into three distinct regions, consisting of a crown which surrounds the tire in the circumferential direction, two beads and two sidewalls which in particular allow a gap between the tire and the rim of the wheel on which it is mounted. The airtight connection of the sidewall radially connects each bead to the crown. [0003] Tires need to meet airtight limits to contain pressurized gas in the chamber formed by the inner surface of the tire and the wheel. [0004] Pressurized gas may leak through diffusion of the gas through the tire. [0005] Furthermore, the diffusion of gases (more specifically, the diffusion of oxygen through the tire) can lead to premature failure (in particular through oxidation) of the elements used in the composition of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/06B60C9/18
CPCB29D30/0681B60C9/18B29D2030/0682B32B3/28B32B7/08B32B25/08B32B25/18B32B37/156B32B2250/02B32B2250/24B32B2307/7242B32B2307/732B32B2309/105B32B2323/00B32B2605/00B60C1/0008B60C5/14
Inventor F·皮亚洛J·梅里诺洛佩斯
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN