steel cord with high rates of elongation and pneumatic tire containing the cord

摘要

a steel cord (200), a high elongation cord, namely, an elongation at fracture of greater than or equal to 5%, contains multiple threads (205), u0441u0432u0438u0442u044bu0445 together with the step of the twist of the cord. the step of the twist of the cord results in a certain corner of the twist of the cord.each string (205) contains many wires (210), u0441u0432u0438u0442u044bu0445 along with the step of the twist of the strands, resulting in some corner of the twist of the filament.the structural elongation of steel cord (200) high elongation equal to or greater than the angle of the twist of the thread for 2.0% of total, and the angle of the twist of the cord between 20 and 29u00b0, or the art u0440u0443u043au0442u0443u0440u043du043eu0435 elongation is greater than or equal to 2.5% of the amount between 30 and 38o, or the structural elongation is greater than or equal to 3.0% in total between 3 9 and 48u00b0.the steel cord is reliable and has long service life, demonstrates the high rate of penetration of rubber and is therefore resistant to corrosion.