US 11,981,161 B1
All-steel tire with 100% definite elongations of upper and lower treads being interrelated to each other
Tenglong She, Guiyang (CN); Gege Huang, Guiyang (CN); Daiqiang Li, Guiyang (CN); and Kan Heng, Guiyang (CN)
Assigned to GUIZHOU TYRE CO., LTD., Guiyang (CN)
Filed by GUIZHOU TYRE CO., LTD., Guiyang (CN)
Filed on Aug. 7, 2023, as Appl. No. 18/230,800.
Claims priority of application No. 202211709484.8 (CN), filed on Dec. 29, 2022.
Int. Cl. B60C 1/00 (2006.01); C08J 3/22 (2006.01); C08K 3/011 (2018.01); C08K 3/04 (2006.01); C08K 3/06 (2006.01); C08K 3/22 (2006.01); C08K 5/09 (2006.01); C08K 5/541 (2006.01); C08L 7/00 (2006.01)
CPC B60C 1/0016 (2013.01) [C08J 3/22 (2013.01); C08K 3/011 (2018.01); C08K 3/04 (2013.01); C08K 3/06 (2013.01); C08K 3/22 (2013.01); C08K 5/09 (2013.01); C08K 5/541 (2013.01); C08L 7/00 (2013.01); C08J 2307/00 (2013.01); C08J 2409/00 (2013.01); C08J 2491/06 (2013.01); C08K 2003/2296 (2013.01); C08K 2201/014 (2013.01); C08L 2205/03 (2013.01); C08L 2310/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An all-steel tire with 100% definite elongations of upper and lower treads being interrelated to each other, comprising an upper tread rubber layer A and a lower tread rubber layer B which are superposed in sequence, wherein a ratio of stresses at 100% definite elongation of the upper tread rubber layer A to the lower tread rubber layer B is (0.7 to 0.8): 1, wherein materials used in the upper tread rubber layer A comprise the following components in parts by weight:
60 parts of the natural rubber, 40 parts of the cis-butadiene rubber, 45 parts of the carbon black, 15 parts of the white carbon black, 4 parts of the zinc oxide, 2.5 parts of the stearic acid, 1.5 parts of the microcrystalline wax, 3.5 parts of the anti-aging agent, 5 parts of the softener, 3 parts of the silane coupling agent, 3.5 parts of the sulfur, and 1.5 parts of the accelerator;
wherein the materials used in the lower tread rubber layer B comprise the following components in parts by weight:
100 parts of the natural rubber, 40 parts of the carbon black, 20 parts of the white carbon black, 5 parts of the zinc oxide, 3 parts of the stearic acid, 0.5 part of the microcrystalline wax, 3 parts of the anti-aging agent, 4 parts of the silane coupling agent, 2 parts of the softener, 3.5 parts of the sulfur, and 2.5 parts of the accelerator;
and the stress at 100% definite elongation of the lower tread rubber layer B is 3.2-5.5 MPa.