HIGH ELONGATION STEEL CORD AND PNEUMATIC TIRE COMPRISING SAID CORD

摘要

The present invention relates to a high elongation steel cord 200 comprising a plurality of strands 205 twisted together at a cord twist pitch, i.e., a cord having an elongation at break of 5% or more. A cord twist angle is created due to the cord twist pitch. Each strand 205 includes a plurality of filaments 210 twisted together at a strand twist pitch that creates a strand twist angle. The structural elongation of the high elongation steel cord 200 is 2.0% or more for the sum of the strand twist angle and the cord twist angle of 20 degrees to 29 degrees, or the structural elongation is 2.5% or more for the sum of 30 degrees to 38 degrees. , Or the structural elongation is at least 3.0% for the sum of 39 degrees to 48 degrees. Steel cords are stable and durable, and are corrosion resistant because they are characterized by high rubber permeability.