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US 10,046,603 B2Granted
Pneumatic radial tire
AssigneeKordsa Global Endustriyel Iplik Ve Kord Bezi Sanayi Ve Ticaret Anonim Sirketi
InventorsKürsat Aksoy, Saadettin Fidan, Bekir Anil Mertol
Life of this patent
Estimating the term…
Abstract
Pneumatic radial tire (1) having improved high speed durability and low flatspot feature, and which has polyethylene terephthalate cap ply reinforcement layer (6). The objective is to provide a pneumatic radial tire (1) wherein the pressure on the belt package (5) is increased at high speed and high temperature by increasing the thermal shrinkage force of the cap ply cord.
Claims7
A pneumatic radial tire comprising:
- a plurality of polyethylene terephthalate cords;
- at least one cap ply reinforcement strip;
- wherein, the at least one cap ply reinforcement strip is formed of the polyethylene terephthalate cords and is wound onto a belt package;
- wherein, the secant modulus of the cords is between 2.0 and 2.5 mN/dtex. % at 160° C. between elongations of 3 to 5%;
- wherein, the thermal shrinkage force of the cords is above 2.mN/dtex at 177° C. (according to ASTM D885);
- and wherein, the cords are obtained by relaxation of 1 to 3% at 220-240° C., and then cold stretching between 1 to 5% at 140-200° C.
3 more elements
Dependencies are inferred from the claim text.