| abstract |
Offer improves the Pneumatic run-flat tire of durability by improving the compression fatigue of casingply cord.In Pneumatic run-flat tire, carcass (2) is as skeleton and sidewall strengthens rubber (4) and is arranged on the inside of the tire width direction of sidewall (12).In tire width direction section, it is S1 that sidewall strengthens the area of rubber, the area of tyre bead filler (5) is S2, the area of the rubber bead infantees (6) being configured on the outside of the tire width direction of tyre bead filler and bead core is S3, meets 0.10≤(S2+S3)/S1≤2.50 and 0≤S2/ (S2+S3)≤0.9.The reinforcing cord of casingply includes polyester fiber and/or aromatic polyamide fibre, and adhesive composite is coated with, the adhesive composite is that the heat-curing resin comprising blocked isocyanate of 35 mass parts to 100 mass parts is calculated as with solid composition relative to the solid composition of 100 mass parts latex, compounding. |