Strip-shaped steel cord

Patent metadata

Field	Value
Publication number	US-9862234-B2
Application number	US-201414392312-A
Country	US
Kind code	B2
Filing date	Jun 23, 2014
Priority date	Jun 26, 2013
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A steel cord is obtained by bundling five steel core wires, which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive having a thickness Ad of less than 15 μm. Each of the core wires-constituting the steel cord has a diameter d of less than 0.45 mm, and spacing Gd between the core wires is less than 20 μm. The core wires used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.

First claim

The invention claimed is:

1. A strip-shaped steel cord in which multiple brass-plated steel core wires arrayed in parallel with one another are bundled with said parallel array being maintained intact, wherein:
a wire diameter of each of said core wires is less than 0.45 mm;
the surface thereof is coated with an adhesive to a thickness of less than 15 μm and the multiple core wires are fixed together into a unitary body by said adhesive;
a spacing between mutually adjacent core wires is less than 20 μm; and
free coil diameter of each of said core wires is greater than the wire diameter by 750 times or more.

2. A strip-shaped steel cord according to claim 1 , wherein said wire diameter is equal to or greater than 0.15 mm and less than 0.45mm.

3. A belt layer for tires, said belt layer having embedded therein the strip-shaped steel cord set forth in claim 1 .

4. A tire having the belt layer for tires set forth in claim 3 .

Assignees

• Tokyo Rope Mfg Co
• Nippon Steel & Sumitomo Metal Corp

Inventors

• Tamada Akira
• Murakami Yuuki
• Ohashi Shouichi
• Sugimaru Satoshi

Classifications

• D02G3/12

  Threads containing metallic filaments or strips · CPC title

• B60C9/0007

  Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal · CPC title

• B60C2009/2077

  Diameters of the cords; Linear density thereof · CPC title

• D02G3/48

  Tyre cords {(tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606)} · CPC title

• D07B2401/205

  Avoiding relative movement of components · CPC title