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Method of treating tyre reinforcing ply cords

A technology of ply and tire, applied in the direction of reinforcement layer, tire parts, tire, etc. of pneumatic tires

Active Publication Date: 2019-02-05
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The inventors of the present invention have developed a treatment method for cords capable of solving those problems associated with the absence of rubber in the interstices of the cords

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0019] For a better understanding of the present invention, the following examples are given for illustrative and non-limiting purposes.

[0020] Four composites were prepared, each consisting of metal cords and two subbing layers configured to incorporate the metal cords by means of a calendering operation.

[0021] The types of metal cords and topping layers were the same for all four compounds.

[0022] The four compounds differ only due to the treatments the cords undergo before incorporation. In particular, compound A was prepared without the cord having undergone any treatment; compound B was prepared by treating the metal cord with polybutadiene having an average molecular weight of 8000 Da and a viscosity equal to 15 Pa·s at room temperature; by Compound C was prepared by treating metal cords with hydroxyl-functionalized polybutadiene having an average molecular weight of 2500 Da and a viscosity at room temperature of 8 Pa s; Compound D was prepared by treating metal...

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PUM

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Abstract

A method for making rubber portions comprising tyre metallic reinforcing plies. This method comprises an incorporation step in which metallic cords which constitute the plies are arranged between twoskim layers and a treatment step for the metallic cords, which precedes the incorporation step and in which the metallic cords are wetted with a diene elastomeric polymer with a viscosity of between 3and 10 Pa.s at room temperature.

Description

technical field [0001] The present invention relates to a method for treating reinforcing ply cords for tires. Background technique [0002] In tire manufacture, in order to ensure the required resistance standards, reinforcing plies made of textile materials (nylon, rayon, polyester, aramid) and / or metallic materials such as steel are utilized in the tires. Reinforcing plies are commonly used as reinforcing material in the carcass and belts. [0003] The carcass serves to define the geometry of the tyre, supporting loads and transferring vehicle stresses to the ground and ensuring fatigue resistance in the stressed areas. The belt is arranged between the carcass and the tread and serves to further increase the resistance of the tire, stabilize the tread and provide protection against impacts and punctures to the innermost layer. [0004] The reinforcing ply is incorporated into the rubber layer with a thickness of about 1 mm. This rubber layer is commonly referred to by ...

Claims

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Application Information

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IPC IPC(8): B60C9/00D07B1/16
CPCB60C9/0007B60C2009/0014B60C2009/0021D07B1/062D07B1/16D07B7/145D07B2201/2046D07B2201/2082D07B2205/2082B29D30/40B29D2030/383D07B2801/16D07B1/162D07B2501/2046
Inventor L·卡里阿诺F·马道
Owner BRIDGESTONE CORP