Rubber reinforcing material with reduced weight, method of preparing the same and tire comprising the same

A rubber reinforcing material comprising:

• a fiber base;
• an adhesive layer placed on the fiber base;
• and
• a rubber compound layer placed on the adhesive layer,
• wherein the rubber compound layer has a thickness of 2 μm to 200 μm, a t50 value of 150 to 220 seconds, and a t90 value of 300 to 350 seconds
• (wherein, the t50 value is a time (seconds) required to reach 50% of the maximum crosslinking density of the rubber compound layer, measured by a rheometer according to the ASTM D2084 standard test method, and the t90 value is a time (seconds) required to reach 90% of the maximum crosslinking density),
• wherein the rubber compound layer comprises an elastic polymer, sulfur, a vulcanization accelerator, and a vulcanization retarder,
• wherein the elastic polymer comprises one or more rubbers selected from the group consisting of natural rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, isobutylene rubber, isoprene rubber, nitrile rubber, butyl rubber, and neoprene rubber, and
• wherein the rubber compound layer further comprises one or more additives selected from the group consisting of a peptizer, carbon black, a process oil, an activator, an antiaging agent, a petroleum resin, and an antioxidant.