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 fiber base is a fabric woven with warp yarns and weft yarns,
• the warp yarn is a single-ply yarn with fineness of 420 denier to 800 denier, and is included in the fabric at a warp yarn density of 55/inch to 65/inch, and
• the weft yarn has dry heat shrinkage of −0.50% to +0.50% according to the standard test method of ASTM D 885 (177° C., 2 minutes, load of 0.05 g/de),
• wherein the weft yarn is a single-ply yarn with fineness of 420 denier to 800 denier, and is included in the fabric at the weft yarn density of 0.05/mm to 5/mm,
• wherein the rubber reinforcing material has a maximum load of 1.0 kgf to 1.2 kgf and tensile strain of 11% to 13% in the tensile test under 150° C. for a specimen sized 25 cm of weft yarn direction length and 1 cm wide.