Steel Cord and Method of Manufacturing Rubber Product

Patent metadata

Field	Value
Publication number	US-2016201259-A1
Application number	US-201414783742-A
Country	US
Kind code	A1
Filing date	Apr 3, 2014
Priority date	Apr 11, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A steel cord has a stranded structure comprising a plurality of sheath strands intertwined around the outer circumferential surface of a core strand; and a filament having a linear mass density of at least 560 dtex and not more than 2,200 dtex wrapped in a spiral around the outer circumferential surface of the core strand. The steel cord is embedded in an unvulcanized rubber member to mold a molded rubber article, which is then vulcanized.

First claim

1 . A stranded steel cord comprising a plurality of sheath strands intertwined around an outer circumferential surface of a core strand, the cord being characterized in that a filament having a linear mass density of at least 560 dtex and not more than 2,200 dtex is wrapped in a spiral around the outer circumferential surface of the core strand.

2 . The steel cord according to claim 1 , wherein the filament is Resorcinol Formaldehyde Latex dip-treated.

3 . The steel cord according to claim 1 , wherein the filament is wrapped in a direction opposite the twist direction of the core strand.

4 . A method of manufacturing a rubber product, the method comprising the steps of: molding a molded rubber article by embedding the steel cord described in claim 1 in an unvulcanized rubber member; and vulcanizing the molded rubber article.

5 . The method of manufacturing a rubber product according to claim 4 , wherein the rubber product is a conveyor belt, and the steel cord is embedded in the unvulcanized rubber member as a core.

6 . The steel cord according to claim 2 , wherein the filament is wrapped in a direction opposite the twist direction of the core strand.

7 . A method of manufacturing a rubber product, the method comprising the steps of: molding a molded rubber article by embedding the steel cord described in claim 6 in an unvulcanized rubber member; and vulcanizing the molded rubber article.

8 . The method of manufacturing a rubber product according to claim 7 , wherein the rubber product is a conveyor belt, and the steel cord is embedded in the unvulcanized rubber member as a core.

9 . A method of manufacturing a rubber product, the method comprising the steps of: molding a molded rubber article by embedding the steel cord described in claim 3 in an unvulcanized rubber member; and vulcanizing the molded rubber article.

10 . The method of manufacturing a rubber product according to claim 9 , wherein the rubber product is a conveyor belt, and the steel cord is embedded in the unvulcanized rubber member as a core.

11 . A method of manufacturing a rubber product, the method comprising the steps of: molding a molded rubber article by embedding the steel cord described in claim 2 in an unvulcanized rubber member; and vulcanizing the molded rubber article.

12 . The method of manufacturing a rubber product according to claim 11 , wherein the rubber product is a conveyor belt, and the steel cord is embedded in the unvulcanized rubber member as a core.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Suefuji Ryotaro

Classifications

• D07B1/0613

  the reinforcing cords being characterised by the rope configuration · CPC title

• D02G3/48 Primary

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

• B29C71/02

  Thermal after-treatment {(B29C71/0063 and B29C71/0072 take precedence)} · CPC title

• B60C9/0007

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

• D07B2201/2061

  resulting in a twisted structure · CPC title