RUBBER COMPOSITION FOR BACK-UP RUBBER LAYER HAVING IMPROVED ANTI-FATIGUE PROPERTY BY USING CARBON BLACK N-330 AND AROMATIC OIL

摘要

PURPOSE: Provided is a rubber composition for a back-up rubber layer, which has improved modulus characteristics and anti-fatigue property, thereby giving improved service life of a tire. CONSTITUTION: The rubber composition for a back-up rubber layer comprises: 100 parts by weight of natural rubber, 55-65 parts by weight of carbon black N-330, and 2-4 parts by weight of aromatic oil, without using silica, combined with a coupling agent and dispersant. Particularly, the carbon black N-330 has a DBP adsorption level of 1.20 cm2/g and iodine number of 67 mg/g.