摘要:
Tire with a radial carcass reinforcement, made up of at least one layer of metal reinforcing elements, the tire comprising a crown reinforcement, itself radially capped by a tread, the tread being connected to two beads by two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are non-wrapped cords which, in the test referred to as the permeability test, return a flow rate of less than 20 cm3/min, in a radial plane, at least over part of the meridian profile of the tire, the thickness of rubber compound between the interior surface of the cavity of the tire and the point of a metal reinforcing element of the carcass reinforcement closest to the interior surface of the cavity is less than or equal to 3.8 mm and the ratio between the thickness of rubber compound measured at the circumferential mid plane and the said thickness measured in another region of the tire is greater than 1.05.
摘要:
This pneumatic tire (1) includes: a pair of bead cores (11, 11); a carcass layer (13) extending between the pair of bead cores (11, 11); and a belt layer (14) including a laminate of at least four belt plies (141 to 144) having steel belt cords covered with coating rubber, the belt layer being disposed on the outer side in a tire radial direction of the carcass layer (13). An inter-cord distance (Ga) between an outermost layer belt ply (fourth belt (144)) and an adjacent belt ply (third belt (143)) has a relationship such that 0.80≦Ga/φmax≦1.80 with respect to a maximum value ((max) of outer diameters (φ4, φ3) of belt cords (1441, 1431) in the outermost layer belt ply (144) and the adjacent belt ply (143).
摘要:
A run-flat tire is provided with a reinforcing cord layer adjoining the radial carcass at least from the belt end to the maximum width portion of the tire side portion; the cord constituting the reinforcing cord layer is nylon 66 cord, cellulose fiber cord, PET cord, PEN cord or aramid/nylon 66 hybrid cord, and has a cord angle of less than 10° with respect to the tire radius direction; and the elastic modulus of the cord pulled out from the tire at a temperature of 25° C. under the conditions of a load of 3 N is not higher than 40 cN/dtex, and the thermal shrinkage stress σ (cN/dtex) at a temperature of 177° C. and the elastic modulus E (cN/dtex) at a temperature of 177° C. under the conditions of a load of 10 N satisfy the following conditions: σ+0.025E≧0.36, 40≧E≧8, and σ≧0.05.
摘要:
The tire has a radial carcass reinforcement which includes at least one layer of metal reinforcing elements. The tire also has a crown reinforcement, itself capped radially with a tread. The tread is joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are cords include several steel threads having a weight content of carbon C such that 0.01%≤C
摘要:
An electrostatic energy generator may include one or more first tire cord fabrics each including a conductive material which is a wire-shaped electrode and a non-conductive material, the non-conductive material configured to surround an outer peripheral surface of the conductive material, and one or more second tire cord fabrics each including a conductive material which is a wire-shaped electrode, and a material configured to surround an outer peripheral surface of the conductive material that is different from the non-conductive material of the first tire cord fabric, wherein the first tire cord fabric and the second tire cord fabric are arranged in a longitudinal direction so as to be in contact with each other and form a bundle, such that frictional electricity is generated due to a friction between the first tire cord fabric and the second tire cord fabric.
摘要:
Disclosed is a tire-reinforcing steel cord for a radial tire. The tire-reinforcing steel cord has a double layer structure including a first-layer core and a second-layer core provided on the surface of the first-layer core. The first-layer core has an elliptical or rectangular cross section. The tire-reinforcing steel cord can improve processability, fatigue characteristics, and rolling resistance performance of a tire, resulting in improved fuel efficiency. A radial tire using the tire-reinforcing steel cord is also disclosed.
摘要:
A reinforcement cord which comprises a first fiber (302) having a first radiation attenuation coefficient. The reinforcement cord also comprises a contrast agent applied to the first fiber. The contrast agent has a second radiation attenuation coefficient that is different (e.g., greater) than that of the first radiation attenuation coefficient. In some embodiments, the reinforcement cord is incorporated into a composite product, such as a tire. In some embodiments, the contrast agent improves and/or enhances the discernibility of the reinforcement cord in a composite product during a radiation examination, such as a computed tomography (CT) scan. A method of manufacturing the reinforcement cord is also disclosed.
摘要:
The invention is directed to a pneumatic vehicle tire having a carcass and a belt built up on the radial outside of the carcass. The tire includes a profiled tread which is built up on the belt on the radial outside of the belt. The belt is formed from at least four belt plies which are arranged one on top of the other from the radial inside to the radial outside. The first belt ply and the second belt ply are crossing working plies. The reinforcing elements of the first and second belt plies are arranged at an angle of 10° to 45° to the circumferential direction. The reinforcing elements of the fourth belt ply are arranged at an angle of 40° to 75° to the circumferential direction and the reinforcing elements of the third belt ply are arranged at an angle of 0° to 5° to the circumferential direction.
摘要:
Disclosed is a pneumatic radial tire for a passenger car having ultra fine steel cords for a carcass ply in which adhesive force between a carcass ply layer and a side wall or a rim flange rubber adjacent to a turn up portion on an outside and a stiffness of the rim flange rubber are larger than a bending stiffness of the carcass ply layer so as to improve durability of a bead part while reducing poor air inletting generated at a carcass turn up portion.
摘要:
Provided is a pneumatic safety tire in which the durability is improved by improving the compression fatigue property of a carcass ply cord.The pneumatic safety tire includes, as a skeleton, a carcass, and a side reinforcing rubber. Provided that the area of the side reinforcing rubber is S1, the area of a bead filler is S2, and the area of a rubber chafer is S3, the following expressions (1) and (2) are satisfied: 0.10≦(S2+S3)/S1≦2.50 (1) 0≦S2/(S2+S3)≦0.9 (2), a reinforcing cord of a carcass ply is composed of a polyester fiber and/or an aramid fiber, and subjected to an adhesive agent treatment in which an adhesive agent containing at least one of a thermoplastic polymer, a heat reactive aqueous urethane resin, and an epoxide compound is used for a first bath, an RFL-based adhesive agent is used for a second bath, and a principal chain of the thermoplastic polymer substantially fails to include a double bond between carbons having an addition reactivity, is composed of an ethylene addition polymer and/or a urethane-based high molecular weight polymer, each of which is composed mostly of a linear chain structure, and includes a cross-linkable functional group as a pendant group.