Steel cord and method of manufacturing rubber product
View Patent ↗Steel cords have a stranded structure in which a plurality of sheath strands is intertwined around the outer circumferential surface of a core strand. The outer circumferential surface of the core strand is covered by a cushioning material made of nonwoven fabric or a resin film.
1. A stranded steel cord comprising a plurality of sheath strands intertwined around an outer circumferential surface of a core strand, the outer circumferential surface of the core strand being covered by a cushioning material made of nonwoven fabric or a resin film, wherein the cushioning material is a nonwoven fabric having mass per unit area of at least 10 g/m 2 and not greater than 40 g/m 2 .
2. The steel cord according to claim 1 , wherein the cushioning material has a melting point of 160° C. or less.
3. The steel cord according to claim 2 , wherein the cushioning material is wrapped around the core strand in a spiral pattern.
4. A method of manufacturing a rubber product, comprising the step of: vulcanizing a molded rubber article formed by embedding the steel cord described in claim 3 in an unvulcanized rubber member at a temperature equal to or greater than a melting point of the cushioning material.
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 1 , wherein the cushioning material is wrapped around the core strand in a spiral pattern.
7. A method of manufacturing a rubber product, comprising the step of: vulcanizing a molded rubber article formed by embedding the steel cord described in claim 2 , in an unvulcanized rubber member at a temperature equal to or greater than a melting point of the cushioning material.
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, comprising the step of: vulcanizing a molded rubber article formed by embedding the steel cord described in claim 1 , in an unvulcanized rubber member at a temperature equal to or greater than a melting point of the cushioning material.
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.