Cord-rubber composite body, rubber product and method for producing cord-rubber composite body

A method of manufacturing a cord-rubber composite, the method comprising:

• coating a surface of a steel wire with a metal nano-ink containing a metal nanoparticle and a solvent in which the metal nanoparticle is dispersed;
• drying a coating film of the metal nano-ink coated to the steel wire;
• drawing the steel wire after the drying;
• and
• covering at least a part of a surface of a steel cord formed after the drawing with rubber,
• wherein the metal nanoparticle contains a first metal nanoparticle and a second metal nanoparticle,
• the first metal nanoparticle contains copper, and
• the second metal nanoparticle contains one or two or more selected from zinc, cobalt, tin, iron, nickel, aluminum, and oxides thereof.