Heavy duty, high-speed, radial tire

Details Heavy duty, high-speed, radial tire Heavy duty, high-speed, radial tire

D - Textiles, Paper

02

G

152/85.2

D02G 3/48 (2006.01) B60C 9/00 (2006.01) B60C 9/10 (2006.01) B60C 9/22 (2006.01)

Patent

CA 2019800

A heavy duty, high-speed radial tire is provided herein. The tire includes a pair of bead portions, each portion having a bead core disposed therein. A carcass is turned up around the bead cores and is composed of at least one ply of carcass cords which are laid at angles in a range from 75 degrees to 90 degrees with respect to the tire equator, the carcass cords being aromatic polyamide fibre cords. An aromatic polyamide fibre cord belt structure is disposed radially outside the carcass and inside a rubber tread. The belt structure further includes a breaker which is disposed radially outside the carcass and which is composed of at least one ply of the aromatic polyamide fibre belt cords which are laid at angles of from 10 to 30 degrees to the tire equator, and a band which is disposed radially outside the breaker and which is composed of plurality of plies of at least one aromatic polyamide fibre belt cord which is wound spirally and continuously from one edge to other edge thereof to be laid at an angle of from 0 to degrees to the tire equator. The product T~D of the cable twist number (T), (i.e., turns/10 cm) of the belt cord and the square root of the total denier number (D) (i.e., deniers) of the belt cord, is from 2.466x10 3 to 3.036x10 3. The elongation (E) (in %) at breakage of the belt cord divided by the total denier number (D) of the belt cord, is from 7.78x10 -4 to 12.22x10 -4. The product T~D of the cable twist number (T) of the carcass cord and the square root of the total denier number (D) of the carcass cord, is from 2.466x10 3 to 3.036x10 3. The elongation (E) at breakage of the carcass cord divided by the total denier number (D) of the carcass cord, is from 7.78x10 -4 to 12.22x10 -4.

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