| 主权项 |
1. A retreaded aircraft tire comprising cushion rubber for retread, a base tire comprising a skeletal carcass member, and precured tread rubber formed of at least one rubber layer,
wherein the cushion rubber for retread contains, in 100 mass % of a rubber component, 60 to 100 mass % of natural rubber and/or synthetic polyisoprene rubber, and also contains, based on 100 parts by mass of the rubber component, 30 to 50 parts by mass of a highly reinforcing carbon black of at least HAF grade, wherein the cushion rubber for retread forms a rubber layer (A) having a 100% modulus (AM) of at least 3.0 MPa and less than 6.0 MPa, and wherein the base tire has an outermost layer (B) located in a depth of 1mm in the inner center direction of the tire from the outermost surface of a buffed surface of the base tire at some distance from the skeletal carcass member and the precured tread rubber has an innermost layer (C), the outermost layer (B) and the inner most layer (C) each being formed of a rubber composition containing, in 100 mass % of a rubber component, 60 to 100 mass % of natural rubber and/or synthetic polyisoprene rubber and wherein the rubber layer (A) formed of the cushion rubber for retread has the 100% modulus (AM), the outermost layer (B) of the base tire has the 100% modulus (BM), and the innermost layer (C) of the precured tread rubber has the 100% modulus (CM), the 100% moduluses (AM), (BM) and (CM) satisfying a relation defined by the following expressions (i) and (ii);
60%≦AM/BM≦140% (i)60%≦AM/CM≦140% (ii) wherein the rubber composition forming the cushion rubber for retread further contains, based on 100 parts by mass of the rubber component, 1.0 to 3.0 parts by mass of a bismaleimide compound represented by the following Formula (III); in Formula (III), A represents a divalent aromatic group having 6 to 18 carbon atoms, or a divalent alkyl-aryl group having 7 to 24 carbon atoms, and y and z each independently represent an integer of 0 to 3. |
