Abstract:
A vehicle tire (1), includes: a tread (2) intended for rolling contact against a surface, the tread (2) having been formed with a tread pattern (20) including circumferential grooves (25) and transverse grooves (26) for removing water from a contact patch between the surface and the tire (1); a tire carcass (3) including at least one body cord (30) and a belt structure (32); a bead area (5) including a bead wire (50), a clinch (52), and an apex (54); a sidewall (4) including an outermost sidewall layer (41), a sideways rising portion of the clinch (52), a body cord (30), and an innerliner (31); the outermost sidewall layer (41) is constructed from a rubber compound which contains 0.2-0.5% by weight of aramid fiber having a fiber length of 1-5 mm.
Abstract:
Provided are a rubber composition for a canvas chafer which, despite being low cost, is excellent in rim chafing resistance, resistance to rim damage, and processability (sheeting processability, rubber flow in the tire, adhesion to adjacent components) and performs well with respect to low heat build-up, and a pneumatic tire including the composition. The invention relates to a rubber composition for a canvas chafer, including: an isoprene-based rubber; a carbon black having an N2SA of 65-200 m2/g; and sulfur, wherein an amount of the isoprene-based rubber is 25-80% by mass and an amount of butadiene rubber is not more than 40% by mass, each based on 100% by mass of a rubber component of the rubber composition, and an amount of the carbon black is 40-80 parts by mass and an amount of the sulfur is 1.0-2.7 parts by mass, each per 100 parts by mass of the rubber component.
Abstract:
[Object] To provide a pneumatic tire 2 from which static electricity is easily discharged.[Solution] The tire 2 includes penetration portions 8, an under tread 6, a belt 16, a carcass 16, and clinches 12. The carcass 16 includes a large number of cords aligned with each other, and a conductive topping rubber. The electric resistance Rc of the carcass which is represented by the following mathematical formula is less than 1.0×108Ω. Rc=ρ/g/(2×3.14×r)×L×10 In the mathematical formula, ρ is the volume resistivity (Ω·cm) of the topping rubber of the carcass, g is the minimum thickness (mm) of the topping rubber, r is the distance (m) from the axis of the tire to an outer end, in the radial direction, of the clinch, and L is the length (m) of the carcass from an end of the reinforcing layer to the outer end, in the radial direction, of the clinch.
Abstract:
[Object] To provide a pneumatic tire 2 which is lightweight and is excellent in durability.[Solution] A tire 2 has a large number of dimples 62 on sidewalls 8 thereof. These dimples 62 are arranged along a circumferential direction. The contour of each dimple 62 is, for example, a rectangle. In each dimple 62, the length in a circumferential direction is larger than the length in a radial direction. The area occupation ratio of each dimple 62 is equal to or greater than 75% but equal to or less than 93%. The contour of each dimple is symmetrical about a straight line extending in the radial direction. Preferably, the depth of each dimple 62 is equal to or greater than 0.5 mm but equal to or less than 4.0 mm. The width of a land between each dimple 62 and another dimple 62 adjacent to this dimple 62 is preferably equal to or greater than 0.3 mm but equal to or less than 3.0 mm.
Abstract:
A tire 2 includes beads 10, a carcass 12, and an insert 18. The carcass 12 includes a carcass ply 36. An inner part 34a of each bead 10 includes an inner core 46a and an inner apex 48a that extends almost outward of the inner core 46a in the radial direction. An outer part 34b of each bead 10 includes an outer core 46b and an outer apex 48b that extends almost outward of the outer core 46b in the radial direction. A ratio of a complex elastic modulus Ea of the inner apex 48a to a complex elastic modulus Eb of the outer apex 48b is less than or equal to 0.3. A ratio of the complex elastic modulus Ea to a complex elastic modulus Ec of the insert 18 is greater than or equal to 1.
Abstract:
A tire (34) includes a tread (38), a pair of sidewalls (42), a pair of beads (44), a carcass (46) laid between both of the beads (44) along an inside of the tread (38) and the sidewalls (42), and a pair of wings (40) positioned on an outside in an axial direction of the sidewalls (42) respectively. Each of the sidewalls (42) includes an inner layer (72) positioned on an outside of the carcass (46) in the axial direction and extended in a radial direction along the carcass (46) and an outer layer (74) positioned on a further outside of the inner layer (72) and extended in the radial direction along the inner layer (72). An inner end (82) of the outer layer (74) is positioned on an inside of an inner end (58) of each of the wings (40) in the radial direction. The inner layer (72) has a higher hardness than a hardness of the outer layer (74).
Abstract:
The present invention relates to a pneumatic tire having a pair of spaced apart bead components, a connecting carcass between said bead components, and a rubber chafer positioned around at least a portion of each of said bead components and intended for contacting a rigid rim of a wheel, wherein said chafer comprises an outer skin layer intended for contacting the rigid rim and an inner core layer disposed radially inward of the skin layer.
Abstract:
A tire having a circumferential tread, at least one belt, an inner liner, a pair of sidewalls, and at least three carcass plies. The tire includes a pair of bead portions, each including a bead core, a bead filler, a flipper, a chafer, and a gum strip. The at least three carcass plies extend radially downward, inward of the bead filler, extend around the bead core, and continue upward, outward of the bead filler and terminate in at least three turn-up ends. At least one of the turn-up ends does not contact at least one of the radially downward extending carcass plies, the flipper, or the bead filler in one of the sidewalls, and at least two of the turn-up ends contact at least one of the radially downward extending carcass plies, the flipper, or the bead filler in one of the sidewalls.
Abstract:
There are provided a rubber composition simultaneously improving low loss factor and wear resistance as compared with the conventional ones as well as a tire using such a rubber composition.The invention lies in a rubber composition using a modified conjugated diene rubber and being excellent in the low loss factor and wear resistance as well as a tire. The rubber composition of the invention is formed by compounding a filler to a rubber component containing (A) a modified conjugated diene rubber having a cis-bond content in conjugated diene portion of not less than 87% and a vinyl bond content of not more than 2% and containing a functional group reactive with a filler and (B) a modified polymer having a modifying functional group number per 1 molecule of an unmodified polymer of not less than 0.6.
Abstract:
A heavy-load tire has a wind bead structure in which a turned-up portion of a carcass ply is wound around a bead core, in which a bead portion is equipped with a bead reinforcing layer having a u-shaped cross section and a bead apex rubber having a triangular-shaped cross section. The turned-up portion has an auxiliary turned-up portion passing through the vicinity of a radially outer side of the bead core. The bead apex rubber includes a high complex elasticity modulus inner apex portion disposed at a radially inner side and a low complex elasticity modulus outer apex portion disposed at a radially outer side.