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Tire, metal cord and process for manufacturing a metal cord

A technology for tires and metals, applied to the reinforcement layer of pneumatic tires, tire components, textiles and paper, etc., can solve the problems of metal cables exposed to the external environment and satisfactory properties

Inactive Publication Date: 2010-03-24
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, as disclosed in these documents, for example, U.S. Pat. Significant variations, for example in the drawing or stranding steps, as a result, the properties of the finished product obtained (e.g. metal cables) are not always satisfactory, especially corrosion resistance and cross-linking with which the finished product is usually embedded Adhesion of rubber materials
[0011] For example, in tires, corrosion may start at the metal cables due to the presence of moisture in the residual air that may remain in the metal cables embedded in the cross-linked rubber material, or because the cross-linked rubber material ruptures with water or a humid environment Direct contact, which may occur during tire use, so that the metal cables are exposed to the external environment

Method used

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  • Tire, metal cord and process for manufacturing a metal cord
  • Tire, metal cord and process for manufacturing a metal cord
  • Tire, metal cord and process for manufacturing a metal cord

Examples

Experimental program
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Effect test

example 1

[0161] A steel wire (NT steel, carbon content: 0.7%) with a diameter of 1.14 mm, coated with a brass coating, was operated as follows:

[0162] First copper layer, alkaline plating bath:

[0163] Copper pyrophosphate: 100g / l;

[0164] Potassium trihydroxypyrophosphate: 400g / l;

[0165] pH: 8.7 adjusted with pyrophosphoric acid;

[0166] Cathode current density (copper anode 10A / dm 2 ;

[0167] Plating bath temperature: 50±5°C.

[0168] Second copper layer, acid plating bath:

[0169] Copper sulfate: 215g / l;

[0170] Sulfuric acid: 60g / l;

[0171] pH: <1;

[0172] Cathode current density (copper anode): 35A / dm 2 ;

[0173] Electroplating tank temperature: 40°C.

[0174] Third zinc layer, acid plating bath:

[0175] Zinc sulfate heptahydrate: 370g / l;

[0176] Sodium sulfate: 30g / l;

[0177] pH: 3;

[0178] Cathode current density (zinc anode): 35A / dm 2 ;

[0179] Plating bath temperature: 25±5°C.

[0180] The coated steel wire thus obtained was heat-treated at ...

example 2

[0213] A steel wire (NT steel, carbon content: 0.7%) with a diameter of 1.14 mm, coated with a brass coating, was operated as follows:

[0214] First copper layer, alkaline plating bath:

[0215] Copper pyrophosphate: 100g / l;

[0216] Potassium trihydroxypyrophosphate: 400g / l;

[0217] pH: 8.7 adjusted with pyrophosphoric acid;

[0218] Cathode current density (copper anode): 10A / dm 2 ;

[0219] Plating bath temperature: 50±5°C.

[0220] Second copper layer, acid plating bath:

[0221] Copper sulfate: 215g / l;

[0222] Sulfuric acid: 60g / l;

[0223] pH: <1;

[0224] Cathode current density (copper anode 35A / dm 2 ;

[0225] Electroplating tank temperature: 40°C.

[0226] Third zinc layer, acid plating bath:

[0227] Zinc sulfate heptahydrate: 370g / l;

[0228] Sodium sulfate: 30g / l;

[0229] pH: 3;

[0230] Cathode current density (zinc anode): 35A / dm 2 ;

[0231] Plating bath temperature: 25±5°C.

[0232] The coated steel wire thus obtained was heat treated at ...

example 3

[0242] A steel wire (HT steel, carbon content: 0.8%) with a diameter of 1.0 mm, coated with a copper coating, was operated as follows:

[0243] First copper layer, alkaline plating bath:

[0244] Copper pyrophosphate: 100g / l;

[0245] Potassium trihydroxypyrophosphate: 400g / l;

[0246] pH: 8.7 adjusted with pyrophosphoric acid;

[0247] Cathode current density (copper anode): 10A / dm 2 ;

[0248] Plating bath temperature: 50±5°C.

[0249] Second copper layer, acid plating bath:

[0250] Copper sulfate: 215g / l;

[0251] Sulfuric acid: 60g / l;

[0252] pH: <1;

[0253] Cathode current density (copper anode): 35A / dm 2 ;

[0254] Electroplating tank temperature: 40°C.

[0255] A steel wire coated with a 1.5 μm thick copper coating was drawn through a drawing die made of tungsten carbide in an immersion tank containing lubricating oil (a 10% by weight emulsion of lubricant in water) until The final diameter of the steel wire is up to 0.2mm, and the nominal thickness of th...

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Abstract

Tire (100) comprising at least one structural element including at least one metal cord comprising a plurality of elementary metal wires stranded together, each elementary metal wire being coated withat least one first metal coating layer, said metal cord being coated with at least one second metal coating layer, wherein said at least one second metal coating layer has a nominal thickness higherthan or equal to 30 nm, preferably of from 50 nm to 120 nm, more preferably of from 70 nm to 100 nm.

Description

technical field [0001] The invention relates to a tire, in particular a tire for heavy transport vehicles, said tire comprising at least one structural element comprising at least one metal cable comprising a plurality of metal wires twisted together, Each metal wire is coated with at least one first metal coating and the metal cables are coated with at least one second metal coating. [0002] Furthermore, the invention relates to a finished rubberized product comprising at least one metal cable comprising a plurality of metal conductors twisted together, each metal conductor coated with at least one first metal layer coating, the metal cable is coated with at least one second metal coating. [0003] In addition, the invention relates to a metal cable comprising a plurality of metal wires twisted together, each metal wire being coated with at least one first metal coating, said metal cable being coated with at least one second metal coating. Metallic coatings are applied, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/00D07B1/06
CPCD07B2205/3071D07B2205/3085B29D30/48D07B2205/3064D07B1/0666B60C15/06D07B2205/3089D07B2201/2013D07B2201/2009B60C9/0007B29D2030/483D07B2201/2011D07B2205/3075D07B2205/3025D07B2201/2006D07B2801/18
Inventor S·阿格雷斯蒂F·帕万
Owner NV BEKAERT SA
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