Abstract: A proper balance between ride comfort, steering stability, and road noise is achieved. A pneumatic tire (1) has a band layer (9) comprising a band ply (9A) where band cords are arranged at an angle of not more than 5 deg. with respect to the circumferential direction of the tire on the radially outer side of a belt layer (7). The band ply (9A) comprises a first ply piece (9a) covering only one side of end portions of the belt layer (7) and a second ply piece (9b) disposed adjacently to the first ply piece (9a), covering continuously the central portion of the belt layer (7) and another side of the end portions, and having a width larger than that of the above-mentioned first ply piece (9a). And, the band cords of said first ply piece (9a) and band cords of said second ply piece (9b) are different in modulus.

Abstract: An apparatus and process are used to make a ready-to-apply tape from greige fabric. This tape can be used as cap plies, breakers and reinforcement in the carcass of tires. The tape is made by dipping a greige mini-fabric which comprises a plurality of single end cords in a solvent-based cement. The cement, which comprises solvent and an elastomeric composition, is dried so that the majority of the solvent evaporates. The elastomeric composition remains, encapsulating the fabric, thereby forming the tape.

Abstract: A pneumatic tire includes a radial ply carcass, a tread portion disposed radially outward of the carcass, and a crown reinforcing structure interposed between the tread portion and the carcass in circumferential relation to the carcass. The crown reinforcing structure includes a belt assembly having at least one belt ply with reinforcement cords extending parallel to one another and an overlay structure including a nylon reinforced layer extending transversely over the belt assembly and making an angle of between ?5 degrees and +5 degrees with an equatorial plane of the tire. The nylon reinforced layer includes nylon cords having a 2000-2200/1 Dtex, 1-10 TPI construction with an end density of 10-35 EPI.

Abstract: Sudden delamination damage between a carcass and a belt layer at the final stage of wear caused by thermal degradation is suppressed. In an all-steel radial structure, reinforcing rubber layer 11 having a 100% modulus which is 2 Mpa or more and is not more than 100% moduli of a topping rubber of carcass 6 and a topping rubber of belt layer 7 and having a thickness T of 0.3 to 3.5 mm is disposed between the carcass 6 and the belt layer 7. The belt layer 7 includes a pair of working belt plies 10 which radially overlap each other and whose belt cords are inclined in one and the other directions with respect to a tire equator. The working belt plies 10 are such that a flexural rigidity G of the belt cord per a single cord falls within the range of 110 to 340 gf·cm, and a belt ply flexural rigidity defined by the product G×N of the flexural rigidity G and the number N of cords per inch of working belt ply 10 falls within the range of 2,000 to 3,500 gf·cm.

Abstract: Provided by the present invention is a technique which can, in a pneumatic radial tire using corrugated steel cords in the circumferential bent, improve the durability of the corrugated steel cords in order to prevent fatigue rupture thereof caused by an increase in energy input. The present invention is a pneumatic radial tire which has a carcass 1 as the skeleton extending in a toroidal shape between a pair of bead portions on either side of the tire, as well as a belt layer 2 and a tread layer 5 successively arranged thereonto at the outer part in the tire radial direction. The belt layer 2 comprises at least one layer of circumferential belt 3 which comprises a plurality of corrugated or zigzag-shaped steel cords extending along the tire circumferential direction, and when the steel cords are removed from the circumferential belt 3, the bending radius of curvature (R) of the steel cords is within the range from not less than 18 mm to not more than 125 mm.

Abstract: The present invention provides a pneumatic radial tire capable of effectively improving belt durability, while ensuring good resistance to wear at a tread surface.

Abstract: An object of the present invention is to provide a pneumatic radial tire that achieves the characteristics of both an excellent effect of reducing road noises of an intermediate frequency (250 to 315 Hz) and an excellent high durability, without lowering the anti-separation performance of a belt cord in edges of belt layers, even in a case where a belt cover layer is composed of an high young's modulus organic fiber cord. The pneumatic radial tire according to the present invention includes: at least two belt layers each composed of a steel cord and disposed on an outer periphery of a carcass layer; and a belt cover layer obtained by winding an organic fiber cord in a tire circumferential direction and disposed to cover at least an edge portion of the belt layers. In the pneumatic radial tire, each of the belt layers is composed of the steel cord with a (2+1) twist structure, and the belt cover layer is formed of a high young's modulus organic fiber cord with young's modulus of 4.5 to 18.

Abstract: Since a protecting layer 43 embedded with reinforcing cords 41 is disposed between a tread 35 and a belt reinforcing layer 31, both of the protecting layer 43 and the belt reinforcing layer 31 decentrally bear a large bending force generated when a pneumatic tire 11 runs on a sharp projection or a difference in level. As a result, even if reinforcing elements 33 in the belt reinforcing layer 31 are extended by large tension due to fill internal pressure, increase of strain generated in the reinforcing elements 33 can be effectively suppressed.

Abstract: A tire includes: a carcass structure including at least one carcass ply, a belt structure, a tread band radially superimposed on the belt structure; two sidewalls; the belt structure including: at least one pair of lateral reinforcing layers incorporating reinforcing elements oriented in a substantially circumferential direction; a first belt layer radially superimposed on the pair of lateral reinforcing layers, provided with reinforcing elements inclined with respect to the equatorial plane of the tire; a second belt layer radially superimposed on the first belt layer, provided with reinforcing elements inclined with respect to the equatorial plane in a direction opposite to those of the first belt layer; an external belt layer applied in a radially external position with respect to the first and the second belt layers. Preferably, the tire is a super single wide base heavy load vehicle tire. The tire is particularly useful for heavy load vehicles such as, for example, trucks, trailers, or buses.

Abstract: This invention relates to a pneumatic radial tire being excellent in steering stabilities during low-speed running and high-speed running, and more particularly to a pneumatic radial tire comprising at least one belt reinforcing layer 6A, 6B disposed on a belt 5 outward in a radial direction of the tire, characterized in that a reinforcing element constituting the belt reinforcing layer 6A, 6B is a polyketone fiber cord satisfying conditions of the following equations (I) and (II): ???0.01×E+1.2??(I) ???0.02??(II) [wherein ? is a thermal shrinkage stress (cN/dtex) at 177° C.; and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N].

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 extending zigzag in the circumferential direction and satisfying the following equations (I) and (II): ???0.01E+1.2??(I) ??0.02??(II) (wherein ? 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)).

Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. Preferably, the tire is a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.

Abstract: This invention provides a radial tire for aircraft comprising a belt composed of a plurality of belt layers, wherein a total strength of the belt Tbelt [N] in a circumferential direction over its full width satisfies Tbelt/WD?1.5×106 in which D [m] is an outer diameter of the tire and W [m] is a width of the tire, the belt is composed of at least two belt layers each containing organic fiber cords with an elongation in an extension direction under a load of 3.2 cN/dtex of 2.2-9.3%, a protection belt layer having a circumferential stiffness lower than that of the belt is disposed at an outside of the belt in a radial direction, a ratio of the circumferential stiffness of the protection belt layer to the circumferential stiffness of the belt is less than 0.5, and the protection belt layer is composed of organic fiber cords having a tensile strength at break of not less than 6.3 cN/dtex and a heat shrinkage factor of 0.5-5.

Abstract: A motorcycle tire comprises: a toroidal carcass comprising two carcass plies of cords arranged at an angle of from 20 to 80 degrees with respect to the tire circumferential direction; and a band comprising at least one ply of at least one helically wound cord disposed radially outside the carcass. The band cord is made of steel filaments of 0.08 to 0.20 mm diameter twisted together into a L×M×N structure. The band cord has a low tensile elastic modulus range and a high tensile elastic modulus range, wherein an inflection point between the low tensile elastic modulus range and the high tensile elastic modulus range lies between 2% elongation and 7% elongation of the cord, and a tensile force required to cause 2% elongation of the band cord is not more than 60 Newton.

Abstract: A steel cord, formed of a plurality of steel filaments, has a construction of N×(7×2) wherein N=1 to 7 and within the circumference of the cross-sectional area, not more than 60% of the cord area is comprised of the steel filaments. The steel cord has an elongation at break of at least 3%.

Abstract: There is provided a pneumatic tire capable of improving high-speed durability and noise characteristics. The pneumatic tire has a belt-reinforcing structure 10 radially outwardly of belt plies 8 and 9, the belt-reinforcing structure 10 having organic fiber cords n spirally wound in the circumferential direction T of the tire. The belt-reinforcing structure 10 has an end reinforcement layer 10B disposed radially outwardly of each end region BE of the belt plies 8 and 9.

Abstract: A rubber composition for covering a steel cord is used to form a rubber-steel cord composite used as a reinforcing material of a pneumatic tire and the like. The rubber composition includes 100 parts by weight of a diene rubber, from 0.3 to 1.5 parts by weight of N-t-butyl-2-benzothiazole sulfenimide, and from 5 to 20 parts by weight of active zinc oxide having a specific surface area by nitrogen adsorption using BET method of 20 m2/g or more.

Abstract: Provided is a pneumatic tire in which changes in steering stability with changes in speed, temperature environment, etc. during running are greatly reduced. A pneumatic tire has a tread part 1, sidewall parts 2, and bead parts 3, and includes a carcass layer 5 composed of at least one carcass ply, a belt layer 6 composed of at least one belt ply, and at least one belt protective layer 7. A cord having a difference in heat shrinkage stress between 30° C. and 80° C. of not less than 3.0×10?2 cN/dtex is used as at least one cord in the belt protective layer 7, and the reduction rate of the dynamic storage modulus of elasticity E? of a coating rubber of the belt layer 6 in a temperature change from 30° C. to 80° C. is not less than 5%.

Abstract: A reinforcement layer for elastomeric products is formed of hybrid cords that are arranged substantially parallel to each other within the layer. The hybrid cords are composed of a first twisted textile yarn made of a first material and a second twisted textile yarn made of a second material. The ends of the two yarns are twisted with each other. The first twisted textile yarn is a polyketone yarn and the second twisted textile yarn is a polyester yarn.

Abstract: A radial tire that has excellent weight balance and appearance quality and that can be produced at excellent productivity. These are achieved by forming a carcass layer (1) by using a single rubber coated cord (C1) without producing joints on a material. The carcass layer (1) is constructed from at least one layer of cord row layer (11A) where rubber coated cords (C1) are cut on piece by piece basis and joined aligned in the circumferential direction of the tire. Each of the rubber coated cords is formed in a cross-section with an oval outline. The cord row layer is joined at only one portion in the circumferential direction of the tire, so that there is substantially no overlap on the layer.

Abstract: In the pneumatic radial tire of the present invention, a total strength K0 of a belt layer 20 in a circumferential direction of the tire per unit of width at a tire equator surface position P0 is set greater than a total strength of the belt layer 20 in the circumferential direction of the tire per unit of width at a width position P2 corresponding to ? of a maximum width of the belt layer having the tire equator surface CL as a center.

Abstract: The present invention provides a pneumatic tire for a motorcycle, in which stability in running straight at a relatively high speed and gripping properties in cornering are improved in a compatible manner. The pneumatic tire for a motorcycle includes slant belt layers 16L, 16U disposed on the outer side in the tire radial direction of a carcass 14 and a “0 degree” belt layer 18 disposed on the outer side in the tire radial direction of the slant belt layers 16L, 16U. The first belt layer 16L as the innermost belt layer in the tire radial direction, of the slant belt layers 16L, 16U, is constituted of three divided portions including two rows of first belt layer side portions 16LA, 16LB disposed on respective side portions in the tire widthwise direction and one row of a first belt layer center portion 16LC disposed at the center portion in the tire widthwise direction.

Abstract: A heavy duty tire comprises a belt disposed radially outside a carcass in the tread portion, and a belt cushion rubber layer inserted between the carcass and each axial edge portion of the belt. The complex elastic modulus of the belt cushion rubber layer is in a range of from 3.5 to 4.5 MPa. The belt is made up of three plies each made of parallel steel cords inclined at an angle of from 15 to 23 degrees with respect to the tire equator. With respect to the tire equator, the inclination of the belt cords of the radially innermost first ply is opposite to that of the middle second belt ply. The second belt ply is narrower than the first belt ply and wider than the radially outermost third belt ply. The ply strengths S1, S2 and S3 of the first, second and third belt plies, respectively, satisfy: (1) S1>S2, (2) S1>S3, (3) 55?S1?75, and (4) 1.25?S1/S2?1.65.

Abstract: A pneumatic tire having a reduced weight and improved durability is provided. In this pneumatic tire, at least one of the carcass ply and belt plies or the belt-reinforcement layer is constituted of reinforcing cords being para-aramid cords, and the para-aramid cords satisfy the relationship represented by the following formulae (I) to (III): E?32.14×T?236??(I) E?150??(II) T?19??(III) (where E represents a modulus of elasticity (cN/dtex) at 25° C. under a load of 49 N, and T represents a tensile strength (cN/dtex)).

Abstract: A belt reinforcement layer 16 disposed on a out side of a crossing belt 15 of the pneumatic tire across the full width of the crossing belt 15 comprises a first spiral reinforcement layer 17 covering the crossing belt 15 in wide range as a tread center portion is a center, being narrower than a tread width and being composed of an aromatic polyamide, a second spiral reinforcement layer 18 covering both end of two belt layer 15a and 15b of the crossing belt 15 and having a cord that a diameter thereof composed of a nylon is finer than a cord of the first spiral reinforcement layer 17 and a overlap portion 18z that a reinforcement layer overlaps is provided on a part of the second spiral reinforcement layer 18 so that separation between the belt layer and belt reinforcement layer can be controlled strongly and effective hoop effect is exhibited at the tread end portion so as to improve driving stability and durability at high-speed driving.

Abstract: A radial tire is provided for use with off-the-road (OTR) vehicles. The tire includes steel belts with organic belts or an organic carcass.

Abstract: A tire includes a carcass structure of a substantially toroidal shape, having opposite lateral edges terminating in respective bead structures; a belt structure applied in a radially external position with respect to the carcass structure, the belt structure including at least one belt layer, a tread band radially superimposed on the belt structure; a pair of sidewalls applied laterally on opposite sides with respect to the carcass structure, wherein the at least one belt layer includes at least one reinforcing cod including a core including at least one first elongated element including at least one composite material, the composite material including a plurality of elongated fibers embedded in a polymeric material, the core being wrapped with at least one second elongated element including at least one elementary metal wire.

Abstract: Provided is a method of producing a pneumatic tire, which makes it possible to prevent, in forming a circumferential reinforcement layer by using a jointless material including one or more steel cords coated with rubber, occurrence of air pockets caused by variation in positions of wrapping of the jointless material. The method of producing a pneumatic tire includes forming a circumferential reinforcement layer in a way that while being oriented in the tire circumferential direction, a jointless material is wrapped helically in the tire axial direction around the outer peripheral side of a carcass layer in a tread portion, the jointless material including one or a plurality of steel cords coated with rubber. In the method, a lateral cross-sectional shape of the jointless material is formed substantially as a parallelogram, and a range of an inclination angle ? of the parallelogram is set to 5°???20°.

Abstract: A pneumatic tire has an axis of rotation. The pneumatic tire includes a carcass having at least one reinforced ply, a tread disposed radially outward of the carcass, and a belt structure disposed radially between the carcass and the tread. The belt structure includes cords of at least three strands of twisted polyketone yarn. The twisted polyketone yarn has a linear density from 1570 dtex to 1770 dtex and a twist level from 3.0 TPI to 8.0 TPI. The cords have a twist level from 3.0 TPI to 8.0 TPI and a twist direction opposite to a twist direction the polyketone yarn.

Abstract: A pneumatic tire comprises a tread reinforcing belt, and the belt includes a band composed of at least one helically wound rayon cord, wherein the rayon cord is composed of (1) a single bunch of filaments final-twisted together, or (2) 2 or 3 bunches of nontwisted filaments which bunches are final-twisted together, or (3) 2 to 3 strands final-twisted together wherein each of the strands is a bunch of filaments primarily-twisted together, and the final-twist number (turn/10 cm) and a total decitex value D (dtex) of the rayon cord satisfy the following conditions: 1840=<D=<5520; and 1.0=<N×D?0.5×10??3=<5.3×10??4×D+0.41.

Abstract: A system for and method of reducing the rolling resistance of a tire by pre-heating the tire prior to use.

Abstract: A heavy duty radial tire having an aspect ratio of at most 50%, the outer diameter growth of which at tread shoulder portions is suppressed to improve uneven wear resistance and durability, and wherein belt layer 7 includes a radially outermost belt ply 10, belt cords of belt plies 9 except the outermost belt ply 10 are arranged at an angle ? of 10 to 70° with respect to the circumferential direction, and the outermost belt ply 10 is made of a spiral wind ply 12 in which a ribbon-like strip 11 having steel cords is spirally wound in the circumferential direction, and the outermost belt ply 10 has a main body portion 10A which extends between ply folding back positions Po located on both sides of the tire equator, and fold portions 10B which are folded back at the ply folding back positions Po toward the tire equator in a U shape, in which the width CWa of the main body portion 10A is from 70 to 80% of a tread ground contact width TW, and the width CWb of each fold portion 10B is at least 5.

Abstract: Elastic metal/textile composite cord (C-1) having two layers (Ci, Ce) of 1+N construction, formed from a core or inner layer (Ci) comprising a textile core thread (10) of diameter d1 and a metal outer layer (Ce) of N wires (12) of diameter d2 wound together in a helix with a pitch p2 around the layer Ci, said cord being characterized in that it has the following characteristics (p2 in mm): As>1.0%; At>4.0%; Af>6.0%; d1>1.1d2; 4<p2<14; and the core thread (10) is a textile fibre and is embedded in a sheath (11) of diene elastomer composition, As being the structural elongation of the composite cord, At its total elongation at break, and Af being the elongation at break of the textile fibre. Use of such a cord for the reinforcement of tires, for example in the belt of these tires.

Abstract: A pneumatic tire containing a tread, a carcass having at least one belt ply disposed below the tread, and a cap ply located between the carcass and the tread. The cap ply comprises at least one layer of an open construction leno weave tape having a pair of warp yarns in the longitudinal direction and a weft yarn in the weft direction. The pair of warp yarns comprises a first warp yarn and a second warp yarn, where the second warp yarn has a force of elongation of between about 1 and 40% the force of elongation of the first warp yarn, where the second warp yarn is in tension, and where the second warp yarn has an elongation at break of greater than 2%. The leno weave tape is disposed in a flat pattern around the circumference of the carcass in the area of the belt ply. A method of making a pneumatic tire is also disclosed.

Abstract: A pneumatic tire containing a tread, a carcass having at least one belt ply disposed below the tread, and a cap ply located between the carcass and the tread. The cap ply comprises at least one layer of an open construction leno weave tape having a pair of warp yarns in the longitudinal direction and a weft yarn in the weft direction. The pair of warp yarns comprises a first warp yarn and a second warp yarn, where the second warp yarn has a force of elongation of between about 1 and 40% the force of elongation of the first warp yarn, where the second warp yarn is in tension, and where the second warp yarn has an elongation at break of greater than 2%. The leno weave tape is disposed in a flat pattern around the circumference of the carcass in the area of the belt ply. A method of making a pneumatic tire is also disclosed.

Abstract: Provided are a pneumatic tire with a durability which is improved by preventing oxygen deterioration of coating rubber of a reinforcement layer, and a method of manufacturing the pneumatic tire. The pneumatic tire according to the present invention is a pneumatic tire including a reinforcement layer having reinforcement cords. In the pneumatic tire, the reinforcement layer is covered with thin films each made of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer in a way that the reinforcement is wrapped with the thin films.

Abstract: A reinforcement layer for elastomeric products, in particular for the belt bandage of pneumatic vehicle tires, are hybrid cords which are arranged generally parallel to one another inside the layer and are composed of a first twisted textile yarn made of a first material and a second twisted textile yarn made of a second material. The ends of both yarns are twisted with each other and the first twisted textile yarn is a polyketone yarn. The reinforcement layer of hybrid cords for elastomeric products, in particular for the belt bandage of pneumatic vehicle tires, has a force-extension behavior that, when using the reinforcement layer as a belt bandage in pneumatic vehicle tires, ensures the simple production of tires, including vulcanization, and a great suitability to high speeds. To this end, the second twisted textile yarn is an aramid yarn.

Abstract: There is provided a steel cord for reinforcing rubber article having superior durability, and a pneumatic radial tire improved in steering stability and durability by using it. There is also provided a pneumatic radial tire satisfactorily combining steering stability, durability, and good cost performance required for a high performance radial tire intended for the application to a high performance passenger car. The steel cord for reinforcing rubber article has a 1×n structure composed of a plurality of steel filaments stranded in the same direction at the same stranding pitch, wherein the number of the steel filaments is 6 to 12 and the diameter of the steel filaments is 0.08 to 0.21 mm. In the pneumatic radial tire having a carcass (1), as a framework, extending toroidally between a pair of bead parts (11), with a crown part of the carcass being reinforced with a belt layer (2), the above-described steel cord for reinforcing rubber article is applied to a cord constituting the belt layer.

Abstract: There are provided a pneumatic radial tire of heavy load vehicles, in which durability of a belt is improved. A pneumatic radial tire for heavy load vehicles comprises a pair of bead portions in each of which a bead core is embedded, a radial carcass ply 1 extending from one bead portion to the other bead portion and turned around the bead core from an inner side to an outer side of the bead core in a width direction of the tire and at least six belt layers 2 disposed on an outer side of this radial carcass ply 1 in a radial direction of the tire, wherein the following relations are satisfied: W56>W34>W12, where W12 is a maximum width of first and second belts 2a f the belt layers 2, W34 is a maximum width of third and forth belts 2b of the belt layers 2 and W56 is a maximum width of fifth and sixth belts 2c of the belt layers 2; and 1>D12/D34>0.6, where D12 is a cord diameter of the first and second belts and D34 is a cord diameter of the third and forth belts.

Abstract: A pneumatic tire has a tread, a carcass with belt plies disposed below the tread, and a cap ply layer between the tread and the belt plies of the carcass. The cap ply is a weft inserted warp knit fabric tape comprising an in-lay warp yarn set, a weft inserted yarn set, and a stitching yarn set, wherein the stitching yarn set forms a repeating stitch pattern on each warp yarn comprising a sequence of at least 2 stitches around the warp yarn from one stitching yarn and at least 2 stitches around the warp yarn from the adjacent stitching yarn. The tape is wound in a flat helically wound around the belt plies and covered with a tread of the tire.

Abstract: A pneumatic tire for a motorcycle, wherein the tire is optimized in the ground contact shape and the ground contact pressure distribution during high-speed running to achieve excellent driving stability, is provided. Furthermore, a pneumatic tire for a motorcycle, wherein the tire is optimized in the ground contact shape and the ground contact pressure distribution during high-speed running to realize excellent gripping force to stabilize the behavior of the tire near its cornering limit and excellent cornering ability, is provided. Provided is a pneumatic tire for a motorcycle, which employs a multifilament-twist polyketone fiber cord, as a reinforcing material, having a total dtex value of 1000 to 20000 dtex per cord and satisfying the relationships represented by the following Expressions (I) and (II): ???0.01E+1.2??(I) ??0.02??(II) (wherein, E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N, and ? is a heat shrinkage stress (cN/dtex) at 177° C.).

Abstract: A rubberized fiber material is used in a belt reinforcing layer of a pneumatic tire, and comprises polyketone fibers having substantially a repeat unit represented by the following formula (I): (wherein A is a moiety derived from an ethylenically unsaturated compound polymerized through ethylenic linkage, and may be same or different in repeat units) and a coating rubber covering the fibers, in which the coating rubber has a modulus at 100% elongation (room temperature) of not less than 2.5 MPa but not more than 5.5 MPa and a rebound resilience of not less than 60%. Also, a pneumatic tire comprises a belt reinforcing layer made from the rubberized fiber material.

Abstract: Provided is a pneumatic tire with a durability improved by preventing the oxidation degradation of a belt layer. The pneumatic tire includes: an air permeation preventive layer disposed in the inner surface of the tire; a belt layer buried in a tread part; and a cord layer formed by arranging a plurality of cords. The cord layer is disposed between the air permeation preventive layer and the belt layer, and extends to a bead part side further from a tire maximum width position. In addition, at least a part of the cord layer is located close to the outer surface of the tire, at a position closer to the bead part side than the tire maximum width position, so that the distance between the cords and the outer surface of the tire is not more than 2 mm. The following configuration may alternatively be possible. A cord layer is formed by arranging cords in parallel.

Abstract: This invention relates to a pneumatic tire wherein at least one of a carcass (4) and a belt (6) comprises a layer of steel cords covered with a coating rubber, and as the coating rubber covering the steel cords in at least one of the carcass (4) and the belt (6) is used a rubber composition comprising a rubber component (A), 1-10 parts by mass of sulfur (B) and 0.1-10 parts by mass of a compound (C) including a substituted benzene ring, a compound (D1) having a particular structure or a composition (D2) consisting essentially of such a compound based on 100 parts by mass of the rubber component, and as the steel cord is used a steel cord formed by twisting a plurality of steel wires each plated on its peripheral face with a brass and having an amount of phosphorus as an oxide in a surface layer region from a surface of the plated brass to a depth of 5 nm inward in a radial direction of the wire controlled to not more than 1.5 atomic %.

Abstract: This invention relates to a pneumatic radial tire having low road noise and flat spot and a high high-speed durability, and more particularly to a pneumatic radial tire comprising a radial carcass (5), a belt (6) disposed outside a crown portion of the carcass in a radial direction and comprised of at least two belt layers, and a belt reinforcing layer (7A, 7B) disposed outside the belt in the radial direction, characterized in that the belt reinforcing layer 7A, 7B is formed by continuously and spirally winding a polyethylene terephthalate cord(s) in a circumferential direction of the tire, and this cord has an elastic modulus of not less than 2.5 mN/dtex·% under a load of 29.4 N measured at 160° C.

Abstract: A pneumatic tire in which lightweight of the tire and durability of a belt are highly compatible by suppressing occurrence of belt edge separation while realizing a reduction in weight of the tire is provided. Each of a first belt layer 5a which is a first layer of a belt and a second belt layer 5b which is a second layer thereof is configured so that drawn and arranged monofilament cords 6 each having a filament diameter in the range of 0.18 to 0.26 mm are embedded in a coating rubber 8 while being juxtaposed in a belt width direction in a unit of a bundle of five to seven of the monofilament cords 6, and the gauge of a layer of the rubber between the monofilament cords 6 in the first belt layer and monofilament cords 6 in the second belt layer at an edge of the second belt layer is 1.3 to 3.0 times the gauge thereof at the central portion of the tire.

Abstract: W is the width of the belt layer 5a in the innermost side in the tire radius direction. A is the region of the belt reinforcing layer 11 which is the region at the both sides of the tire equator plane 30 in the tire width direction. B is the region in the outer side of the region A in the tire width direction. C is the region that is further outer side of the region B. Ma, Mb and Mc are tensile modulus per inch of the region A, B and C respectively. The width Wa of the region A is 2 to 10% of W, the width Wb of the region B is 15 to 40% of W, Mc is 350 to 2000N, Ma is 100 to 400% of Mc, Mb is 200 to 800% of Mc, and Mb is larger than Ma.

Abstract: The durability is improved by using as a carcass ply cord or a belt cord of a tire a cord formed by twisting plural steel filaments having a tensile strength of not less than 2700 N/mm2, and a total elongation at break of the cord of 3.0-7.0% without sacrificing the excellent ride comfort.

Abstract: A pneumatic tire to effectively enhance the transversal stiffness and prevented the carcass from breaking before the other reinforcement members break is provided. A tread rubber is arranged radially outwardly on the crown portion of the carcass. A belt consisting of at least one belt layer is arranged between the tread rubber and the carcass. The belt layer containing cords extending in a direction inclined from the tire's circumferential direction. At least one circumferential reinforcement layer containing meandering cords extending generally along the tire's circumferential direction in a wavy or zigzag shape is provided radially outwardly or inwardly on the belt or between the belt layers. At least one transversal reinforcement layer containing straight cords extending generally perpendicular to the tire's circumferential direction is provided on the position radially outwardly adjacent to the crown portion of the carcass.

Abstract: A tire for a vehicle wheel includes at least one metallic reinforcing cord comprising a single strand of elementary filaments preformed by sinusoidal waving and wound together. The number of filaments is greater than or equal to 3 and less than or equal to 8. A diameter of each filament is greater than or equal to 0.12 mm and less than or equal to 0.35 mm. A linear density of the at least one reinforcing cord is greater than or equal to 0.18 g/m and less than or equal to 4.0 g/m. A value of a breaking-stress integral of the at least one reinforcing cord is greater than or equal to 5,000 J/m3. In a two-wheeled vehicle, the at least one reinforcing cord in a tire for front-mounting may be distributed with a variable density while, in a tire for rear-mounting, the density may be constant.