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Treatment method of reinforcing ply cords for tires

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

Active Publication Date: 2021-01-22
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
Effect test

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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Abstract

A method of manufacturing a rubber part including a metal reinforcing ply for a tire. The method comprises: an incorporation step in which metal cords constituting the ply are arranged between two topping layers; and a metal cord treatment step which is performed prior to the incorporation step and in which the metal cords are The thread is infiltrated with a diene elastomeric polymer having a viscosity between 3 and 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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Patent Type & Authority Patents(China)
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