Radial tire for airplane
First Claim
1. A radial tire for airplane comprising a pair of bead cores, a radial carcass comprised of at least one carcass ply toroidally extending between the pair of bead cores, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt in N satisfies Tbelt/WD≧
- 1.5×
106 when an outer diameter of the tire is D in m and a width of the tire is W in m, and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0°
with respect to an equatorial plane of the tire and satisfying the following equations I and II;
σ
≦
−
0.01E+1.2
equation I
σ
≧
0.02
equation IIwherein σ
is a heat shrinkage stress at 177°
C. in cN/dtex and E is an elastic modulus at 25°
C. under a load of 49 N in cN/dtex.
1 Assignment
0 Petitions
Accused Products
Abstract
A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD≧1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0° with respect an equatorial plane of the tire and satisfying the following equations (I) and (II):
σ≧−0.01E+1.2 (I)
σ≧0.02 (II)
(wherein σ is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).
2 Citations
5 Claims
-
1. A radial tire for airplane comprising a pair of bead cores, a radial carcass comprised of at least one carcass ply toroidally extending between the pair of bead cores, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt in N satisfies Tbelt/WD≧
- 1.5×
106 when an outer diameter of the tire is D in m and a width of the tire is W in m, and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0°
with respect to an equatorial plane of the tire and satisfying the following equations I and II;
σ
≦
−
0.01E+1.2
equation I
σ
≧
0.02
equation IIwherein σ
is a heat shrinkage stress at 177°
C. in cN/dtex and E is an elastic modulus at 25°
C. under a load of 49 N in cN/dtex. - View Dependent Claims (2, 3, 4, 5)
- 1.5×
Specification