Prepreg and fiber-reinforced rubber materials

A fiber-reinforced rubber material comprising a substrate and a core material;

• wherein said substrate comprises at least one rubber component;
• wherein said core material comprises a prepreg comprising a reinforcing fiber and at least one rubber component;
• wherein said substrate and said core material comprise a common rubber component of the same kind of rubber;
• wherein 50 to 100 wt % of rubber components in the substrate comprise said common rubber component;
• and wherein 50 to 100 wt % of rubber components in the core material comprise said common rubber component.

A fiber-reinforced rubber material comprising a substrate and a core material;

• wherein said substrate comprises at least one rubber component;
• wherein said core material comprises a prepreg comprising a reinforcing fiber and at least one rubber component;
• wherein said substrate and said core material comprise a common rubber component of the same kind of rubber having structural repeating units;
• wherein the common rubber component in the substrate comprises a structural repeating unit having the same chemical formula as the structural repeating unit in the common rubber component of the core material;
• wherein 50 to 100 wt % of rubber components in the substrate comprise said common rubber component;
• and wherein 50 to 100 wt % of rubber components in the core material comprise said common rubber component.