Metallic cord, rubber/cord composite object, and pneumatic tire obtained using the same

A technology of metal cords and composites, which is applied in the field of pneumatic tires, to achieve the effect of improving the wet and heat adhesion characteristics, achieving the effect of increasing the strength and adhesion

Active Publication Date: 2008-12-17
SUMITOMO RUBBER IND LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding organic cobalt salts to rubber can effectively improve the wet-heat adhesion properties

Method used

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  • Metallic cord, rubber/cord composite object, and pneumatic tire obtained using the same
  • Metallic cord, rubber/cord composite object, and pneumatic tire obtained using the same
  • Metallic cord, rubber/cord composite object, and pneumatic tire obtained using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] (1) A brass plating layer is formed on the surface of a steel wire having a diameter of 1.7 mm. Then the electroplating wire was subjected to wire drawing treatment, and the obtained drawn electroplating wire had a diameter of 0.27 mm.

[0074] Brass electroplating is performed by any of the methods described below.

[0075] (A) A copper plating layer and a zinc plating layer are sequentially formed, and then subjected to thermal diffusion treatment to form a binary alloy brass plating layer. This method is referred to as method A.

[0076] (B) sequentially forming a brass coating, a zinc coating, and a third metal coating, and then performing thermal diffusion treatment on them to form a ternary alloy coating. This method is referred to as method B.

[0077] (C) sequentially forming a brass coating and a zinc alloy (zinc / nickel alloy, or zinc / cobalt alloy) coating, and then performing thermal diffusion treatment to form a ternary alloy coating. This method is refer...

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Abstract

A rubber-cord complex 9 including a cord 10 comprising a drawn plated wire 17E prepared by providing a brass plated layer 16 on the surface of an element wire 15 and drawing the resulting plated wire, and a rubber 12 vulcanized and bonded to the cord 10, wherein the rubber-cord complex 9 has an adhesion reaction layer 25 formed by a cross-linking reaction of sulfur and copper, between the rubber 12 and the brass plated layer 16E, and in a wet heat deterioration state after being subjected to the vulcanization to bond the rubber 12 thereto and further held under an atmosphere having a temperature of 50 to 100 DEG C and a humidity of 60 to 100% for one hour to 20 days, the adhesion reaction layer 25 has an average thickness of 50 to 1,000 nm, and the interface S between the adhesion reaction layer 25 and the rubber has a fractal dimension of 1.001 to 1.300.

Description

technical field [0001] The present invention relates to a metal cord and rubber-cord composite in which an adhesive reaction layer formed between the rubber and the brass plating of the plated element wire is specified, thereby suppressing the bond between the plated wire and the rubber in a hot and humid environment The present invention also relates to a pneumatic tire using the composite. Background technique [0002] As reinforcing members for rubber products such as pneumatic tires, hoses, and industrial belts, metal cords have been commonly used in view of a good reinforcing effect and the like. In rubber-cord composites such as rubber products reinforced with metal cords, the surface of the element wires of the cords is plated with brass containing copper and zinc in order to improve the adhesion properties of the metal cords to the rubber. Typically, brass plating is performed by sequentially forming a copper plating layer and a zinc plating layer on the surface of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/06B60C9/00C25D7/06
CPCB60C9/2006C23C10/02C25D5/10C25D5/50C25D7/0607D07B1/0666D07B2201/2011D07B2205/3089D07B2401/2035D07B2401/2095D07B2501/2046D07B2501/2076C23C28/021C23C28/023C23C28/025B60C9/0007D07B2801/18D07B1/06C25D7/06B60C9/00C23C2/26
Inventor 宫崎真一儿玉顺一酒井康夫荒卷庆辅佐野裕一冈本贤一
Owner SUMITOMO RUBBER IND LTD
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