Patent ID: 9033015
Filing Date: 2015-05-19
Classification: B60C,D07B

Abstract:
1. A rubber-steel hybrid cord formed by twisting a plurality of sheath strands around a core strand in which a periphery of and space surrounded by a plurality of core filaments constituting the core strand is coated or filled with a filler rubber (A), thereby forming a multi-twist steel cord, and coating an outer surface of the multi-twist steel cord with a coating rubber (C), wherein an amount of an adhesion promoter contained in the coating rubber (C) is more than an amount of an adhesion promoter contained in the filler rubber (A), and the amount of the adhesion promoter contained in the coating rubber (C) is 1.0 to 3.0 parts by mass, and the amount of the adhesion promoter contained in the filler rubber (A) is 0 to 3.0 parts by mass, relative to 100 parts by mass of the rubber component, and an amount of sulfur in the filler rubber (A) is less than an amount of sulfur contained in the coating rubber (C), and the amount of sulfur contained in the coating rubber (C) is 5.0 to 7.0 parts by mass, and the amount of sulfur contained in the filler rubber (A) is 3.0 to 5.0 parts by mass, relative to 100 parts by mass of the rubber component.