Abstract: Provided is a pneumatic radial tire: that includes a circumferential-direction reinforcement layer having a width increased with fatigue break of the circumferential-direction reinforcement layer being suppressed at edge portions thereof; and that suppresses separation in each of cross belt layers at edge portions thereof. A pneumatic radial tire according to the present invention is a pneumatic tire including: at least two cross belt layers disposed on an outer circumferential side of a carcass layer in a tread portion; and at least one circumferential-direction reinforcement layer disposed between these cross belt layers, a width of the circumferential-direction reinforcement layer being smaller than that of each cross belt layer.

Abstract: In a pneumatic tire for heavy load including a circumferentially-formed groove running in a tire circumferential direction on a surface of a tread part, when a pneumatic pressure equivalent to a normal inner pressure is applied with reference to a case where a pneumatic pressure equivalent to an inner pressure of kPa is applied, a radius growth in a tire radial direction at a crown center of the tread part and in the circumferentially-formed groove located at the most lateral side in a tire width direction is made to be less than 0.3%.

Abstract: A composite hybrid cord comprising a core comprising of a first bundle of synthetic filaments having a filament tenacity of from 10 to 40 grams per decitex and a plurality of cabled strands helically wound around the core, each cabled strand comprising of a plurality of metal strands helically wound around a center second bundle of synthetic filaments that have a filament tenacity of from 10 to 40 grams per decitex. The ratio of the largest cross sectional dimension of the first bundle of synthetic filaments to the largest cross sectional dimension of the second bundle of synthetic filaments is from 1.5:1 to 20:1. The metallic filaments of the cabled strands have an elongation at break that is no more than 24 percent different from the elongation at break of the synthetic filaments of the first and second bundles.

Abstract: Metal cord (C-1) with three layers (C1, C2, C3), which is rubberized in situ, comprising a core or first layer (10, C1) of diameter d1, around which there are wound together in a helix at a pitch p2, in a second layer (C2), N wires (11) of diameter d2, around which there are wound together in a helix at a pitch p3, in a third layer (C3), P wires (12) of diameter d3, wherein the cord has the following characteristics (d1, d2, d3, p2 and p3 being expressed in mm): 0.08?d1?0.50; 0.08?d2?0.45; 0.08?d3?0.45; 5.1?(d1+d2)<p2<p3<4.9?(d1+2d2+d3); over any 2 cm length of cord, a rubber composition called “filling rubber” (13) is present in each of the capillaries (14) lying on the one hand between the core (C1) and the N wires (11) of the second layer (C2), and on the other hand between the N wires (11) of the second layer (C2) and the P wires (12) of the third layer (C3); the content of filling rubber (13) in the cord is comprised between 10 and 50 mg per gram of cord.

Abstract: Metal cord with three layers (C1+C2+C3) of 2+M+N construction, rubberized in situ, comprising a first layer or central layer (C1) comprised of two wires (10) of diameter d1 assembled in a helix at a pitch p1, around which central layer there are wound in a helix at a pitch p2, in a second layer (C2), M wires (11) of diameter d2, around which second layer there are wound in a helix at a pitch p3, in a third layer (C3), N wires (12) of diameter d3, the said cord being characterized in that it has the following characteristics (d1, d2, d3, p1, p2 and p3 being expressed in mm): 0.08?d1?0.50; 0.08?d2?0.50; 0.08?d3?0.

Abstract: A pneumatic tire for use on aircraft has a tread, a crown reinforcement, and a radial carcass reinforcement having at least one axially inner ply of textile cords wound around a pair of bead cores, at least one axially inner ply being wound around the bead core in each bead from inside to the outside forming outside turn-ups and at least one axially outer ply of textile cords extending from bead to bead along the turn-ups of the at least one axially inner ply. The at least one axially inner ply or at least one axially outer ply has merged cords having a percent elongation at break of 12% to less than 20% and a break strength greater than 1050 N with a linear density of greater than 9,000 dtex. Merged cord reinforcement is preferably used in the ply layers or strips of the crown reinforcement as well.

Abstract: A pneumatic tire including a cylindrical annular structure, a rubber layer that will become a tread portion provided along a circumferential direction of the annular structure, on an outer side of the annular structure, and a carcass portion including fibers covered by rubber, provided on both sides in a direction parallel to a center axis (Y-axis) of a cylindrical structure including the annular structure and the rubber layer.

Abstract: Multistrand metal cord of K×(L+M) construction, which can especially be used for reinforcing tire belts for industrial vehicles, consisting of K elementary strands assembled in a helix, with a helix pitch PK, each elementary strand: consisting of a cord (10) having two layers (Ci, Ce) of L+M construction, rubberized in situ, comprising an inner layer (Ci) consisting of L wires (11) of diameter d1, L varying from 1 to 4, and an outer layer (Ce) of M wires (12), M being equal to or greater than 5, of diameter d2, which are assembled in a helix with a pitch p2 around the inner layer (Ci); and having the following characteristics (d1, d2 and p2 being expressed in mm): 0.10<d1<0.50; 0.10<d2<0.

Abstract: Proposed is a pneumatic tire having excellent durability, handling stability and uneven wear resistance even if weight reduction is achieved by improving a belt. The pneumatic tire according to the present invention having a carcass layer 5 toroidally extending from a tread portion 3 through a side wall portion 2 to a bead portion 1, and a belt layer 6 disposed at the outer side of the carcass layer 5 in the tire radial direction, in which the carcass layer 5 includes one or more carcass plies 5a, the belt layer 6 includes a first belt 7 having a first cord 7a inclined with respect to a tire equator S at an angle in the range of 15° to 75° and a second belt 8 having a second cord 8a extending in parallel to the tire equator S, said first belt 7 having a tensile strength smaller than that of the second belt 8.

Abstract: A pneumatic tire comprises a tread-reinforcing band made of at least one spirally wound cord, wherein 2the band cord consists of materially identical high-strength high-modulus organic filaments, and the band cord is formed by first twisting each of filament bunches, subjecting the first twisted bunches to a dip-and-stretch treatment, and then twisting the treated bunches together, whereby the load-elongation curve of the band cord comprises a low-modulus zone and a high-modulus zone whose boundary point is in an elongation range of from 1 to 7%, and the ratio EH/EL of a nominal elastic modulus EH of the high-modulus zone and a nominal elastic modulus EL of the low-modulus zone is in a range of from 2.0 to 10.0. Therefore, high-modulus aramid cords, PEN cords and the like can be used to reduce the tire weight.

Abstract: A tire with radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers, itself radially capped by a tread, the said tread being connected to two beads by two sidewalls, and the crown reinforcement comprising at least one layer of circumferential reinforcing elements. The reinforcing elements of the layer of circumferential reinforcing elements are stranded cords exhibiting, between their initial state and their state when extracted from the tire, a reduction greater than 15 GPa and preferably greater than 20 GPa in the maximum tangent modulus.

Abstract: A tire with radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers, itself radially capped by a tread, the said tread being connected to two beads by two sidewalls, and the crown reinforcement comprising at least one layer of circumferential reinforcing elements. The ratio of the thickness of the crown block at a shoulder end to the thickness of the crown block in the circumferential median plane is greater than 1.20 and the ratio of the distance between the extreme wear surface and the reinforcing elements of the layer of circumferential reinforcing elements in the circumferential median plane to the distance between the extreme wear surface and the reinforcing elements of the layer of circumferential reinforcing elements at the ends of the layer of circumferential reinforcing elements is comprised between 0.95 and 1.05.

Abstract: Pneumatic tire, the belt of which is reinforced by a multilayer laminate comprising at least one multiaxially drawn thermoplastic polymer film, such as for example a biaxially drawn PET film, placed between and in contact with two layers of rubber composition, such as natural rubber. Preferably, the thermoplastic polymer film has, irrespective of the tensile direction considered, a tensile modulus E which is greater than 500 MPa, a maximum tensile stress ?max which is greater than 80 MPa, and an elongation at break Ar greater than 40%. The above thermoplastic polymer film, placed between two layers of diene rubber compositions, can especially be used in the belt of pneumatic tires as a perforation-resistant protective film.

Abstract: A passenger vehicle tire, the crown reinforcement of which has three distinct elements, the three distinct elements comprising: a radial carcass reinforcement formed of reinforcing elements connecting the two beads of the tire, a crown belt comprising reinforcing elements parallel to the circumferential direction of the tire, and a crown triangulation layer comprising reinforcing elements making an angle of between 10 degrees and 80 degrees with the circumferential direction of the tire, the said reinforcing elements of the triangulation layer having a flattened cross section.

Abstract: A 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 a single woven layer of crimped metallic cords extending in the radial direction and in the circumferential direction.

Abstract: The present invention is based upon the unexpected finding that lignin can be incorporated into wire coat stock composition to improve metal to rubber adhesion. It has been further found that lignin can be used as a replacement in whole or in part for conventional rubber-to-metal adhesion promoters, such as cobalt materials which are conventionally used in wire coat stocks to attain and maintain needed rubber-to-wire adhesion properties. In fact, wire coat stocks that contain lignin provide more that adequate rubber-to-metal adhesion characteristics for typical applications, such as in tires, and maintain needed levels of adhesion over long periods of product service. For instance, high levels of rubber-to-metal adhesion are maintained under harsh conditions, such as exposure to elevated temperatures and high levels of humidity.

Abstract: A rubber-steel cord composite is provided having nonlinear physical properties even in a rubber characterized by incompressive properties after vulcanization, and hence the rubber-steel cord composite can show low rigidity and flexible properties in a low-strain region and, on the other hand, can show high rigidity in a high-strain region. The rubber-steel cord composite is provided by bundling steel linear objects 1 subjected to spiral shape forming at substantially identical pitches in an approximately identical phase without twisting, the steel cord being embedded in rubber.

Abstract: A pneumatic tire includes a carcass, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass, and a belt structure radially interposed between the tread and the carcass. The belt structure has UT steel reinforcing cords. The cords have filaments with diameters ranging from 0.18 mm to 0.22 mm.

Abstract: A pneumatic tire includes a carcass structure, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass structure, a belt structure interposed radially between the carcass structure and the tread, and a reinforcement structure having cords of ferritic high aluminum TRIPLEX steel.

Abstract: A pneumatic tire includes a carcass, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass, and a belt structure radially interposed between the tread and the carcass. The belt structure has UT steel reinforcing cords. The cords have filaments with diameters ranging from 0.08 mm to 0.21 mm.

Abstract: A pneumatic tire includes a carcass, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass, and a belt structure radially interposed between the tread and the carcass. The belt structure has UT steel reinforcing cords. The cords have filaments with diameters ranging from 0.18 mm to 0.30 mm.

Abstract: A pneumatic tire includes a carcass, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass, and a belt structure radially interposed between the tread and the carcass. The belt structure has UT steel reinforcing cords. The cords have filaments with diameters ranging from 0.21 mm to 0.60 mm.

Abstract: A pneumatic tire includes a carcass, two sidewalls spaced apart a distance, two beads, a tread disposed radially outward of a crown of the carcass, and an overlay radially interposed between the tread and the carcass. The overlay has UT steel reinforcing cords. The cords have filaments with diameters ranging from 0.08 mm to 0.60 mm.

Abstract: A method of producing a pneumatic tire in which, a cord material of a secondary belt layer has a larger thermal shrinkage rate than that of the primary belt layer to effectively suppress the radial expansion of a tire and advantageously improve cutting-resistance of a tread as in the conventional tire. In the method, a ribbon-shaped strip 22 is folded in a region R, in a developed plan view of a material 21 forming the secondary belt layer, between a side end e of the forming material 21 and a position distanced from the side end toward the tire equatorial side by ¼ of the overall width of the forming material, such that the thus bent ribbon-shaped strip 22 extends in a curved manner to build a green tire.

Abstract: A heavy duty tire comprises a belt disposed radially outside a carcass. The belt consists of a innermost first ply, a second ply and a outermost third belt ply. With respect to the tire equator, the cords of the first ply are laid at an angle ?1 of 15 to 25 degrees; the cords of the second ply are laid at an angle ?2 of 15 to 25 degrees; the cords of the third ply are laid at an angle ?3 of 45 to 60 degrees; the cords of the second ply are inclined oppositely to the cords of the first ply; the cords of the third ply are inclined to the same direction as the cords of the second ply; |?2??1| is not more than 5 degrees; |?3??2| is 30 to 45 degrees; the axial widths W1, W2 and W3 of the first, second and third belt plies, respectively, satisfy W1>W2>W3; strengths S1, S2 and S3 of the first, second and third belt plies, respectively, satisfy S1>S2>S3 and 1.0>S2/S1>=0.6.

Abstract: Reinforcement layer for pneumatic vehicle tires that includes reinforcements formed by one of filaments or cords made of steel that are disposed substantially parallel to and spaced apart from one another and are embedded in rubber material. A cord is formed by a maximum of two filaments twisted together and all of the filaments of the reinforcements have a diameter of less than 0.24 mm and a maximum of two filaments are twisted in each case to form a cord.

Abstract: A pneumatic tire having a carcass and a belt reinforcing structure wherein the belt reinforcing structure is a composite belt structure having at least one radially inner spiral layer and at least one zigzag belt reinforcing structure located radially outward of said spiral layer. The zigzag belt width is preferably wider than the spiral layer.

Abstract: There is provided an aircraft radial tire having a belt with a spiral layer formed by spirally winding a non-extensible and high-elastic cord having a tensile strength of 1500 MPa or more in the circumferential direction, the tire being capable of significantly improving uneven wear of the shoulder portion due to the “drag wear”. Provided that a ground-contact width under the given rim, given internal pressure and the given load is Wf, both of a ratio A/B of an outer diameter A of the tire at a position spaced 0.8*Wf/2 from the equatorial plane to an outer diameter B of the tire at a position spaced 0.5*Wf/2 from the equatorial plane, and a ratio C/D of an inner diameter C of the belt at a position spaced 0.8*Wf/2 from the equatorial plane to an inner diameter D of the belt at a position spaced 0.5*Wf/2 from the equatorial plane are 0.98-1.

Abstract: A pneumatic tire for a passenger car includes a belt layer and a belt cover layer formed by winding a steel cord member in the tire circumference direction on the outer peripheral side of the belt layer. The steel cord member has a structure in which element wires made of steel and having a diameter smaller than 0.18 mm are twisted together to form each strand and the strands are twisted together in the same direction as the direction of twisting of the element wires. The twist pitch on each of the strands is smaller than the twist pitch on the steel cord member, the twist pitch on the strand is 1.0 mm to 2.1 mm, and the twist pitch on the steel cord member is 2.0 mm to 5.25 mm.

Abstract: A tire comprising a hooping reinforcement, wherein the axial distance between neighbouring portions of the hooping reinforcement is greater than or equal to 0.7 mm and smaller than or equal to 2 mm, with the exception of one first axial region L1 and two second axial regions L2. The axial distance of each of the axial ends of the first axial region L1 from the median plane is greater than or equal to 0.05·S and smaller than or equal to 0.15·S, S being the maximum axial width of the tire. The two regions L2 are provided on both sides of the median plane, each second axial region being centred at an axial distance D2 from the median plane, D2 being greater than or equal to 0.25·S and smaller than or equal to 0.4·S. Each second axial region L2 has an axial width W2 that is greater than or equal to 0.1·S. The sum of the axial widths of the first and second axial regions is smaller than or equal to 0.5·S.

Abstract: A pneumatic tire includes a carcass reinforced by a carcass ply, at least one belt ply disposed radially outward of the carcass ply in a crown portion of the pneumatic tire, and at least one overlay ply disposed radially outward of the belt ply in the crown portion of the pneumatic tire. The overlay ply includes at least one composite cord having at least one first core yarn with at least one second outer metallic filament wrapped around the first core yarn such that the first core yarn has a modulus less than a modulus of the second outer metallic filament. The first core yarn has a diameter in the range between 0.012-0.035 inches and a twist in the range between 5-15 TPI. The second outer metallic filament is twisted about the first core yarn between 3-14 TPI.

Abstract: A pneumatic tire for a vehicle includes a carcass reinforced by a carcass ply. The pneumatic further includes at least one belt ply disposed radially outward of the carcass ply in a crown portion of the pneumatic tire. The belt ply includes at least one composite cord having at least one first yarn and at least one second metallic filament wrapped together such that the first yarn has a modulus less than a modulus of the second metallic filament.

Abstract: A pneumatic tire for vehicles has a belt and a reinforcing material layer embedded in at least one rubber mixture. The belt is made of a material that is selected from the group of steel, aramid, carbon fiber, natural fiber, magnesium, and magnesium compounds. The reinforcing material layer is a single-ply or multiple-ply layer that is oriented at an angle between 0 degrees and 5 degrees to the circumferential direction, and is made of at least one polyester thread and/or polyester cord.

Abstract: An object of the present invention is to provide a pneumatic tire capable of reducing rolling resistance, while maintaining good durability of a belt.

Abstract: A tire for a motorized two-wheeled vehicle, comprising a carcass-type reinforcing structure formed of at least two layers of reinforcing elements, and comprising underneath the tread a crown reinforcement structure comprising at least one layer of reinforcing elements. At least the tread surface comprises a first polymeric compound extending in at least the region of the equatorial plane and at least one second polymeric compound having physicochemical properties different from those of said first polymeric compound, the reinforcing elements of said two or more layers forming the carcass-type reinforcing structure forming angles with the circumferential direction of between 70° and 85° and the distance between the reinforcing elements of each of said two or more layers forming the carcass-type reinforcing structure being not more than 0.5 mm across at least 60% of the axial width of at least one region composed of the second polymeric compound.

Abstract: A steel cord for reinforcing a rubber article which can improve the cut resistant property in the case of treading on an obtusely or sharply pointed projection without decreasing the strength in the axial direction of the cord and without increasing the tire weight, as well as a tire utilizing the same as a reinforcing material, are provided. The steel cord for reinforcing a rubber article has a multi-twisted structure formed by twisting a plurality of sheath strands (2) formed by twisting a plurality of wires around a core strand (2) formed by twisting a plurality of wires, and the core strand (1) and the sheath strands (2) are constituted of an at least 2-layer-twisted structure formed by twisting core wires and sheath wires respectively. In this case the relationship represented by the following formula 1.8?[(S·cos2?)/{r·(?1+?2)}]×100?4.

Abstract: A pneumatic radial tire having a belt layer with at least one circumferential belt having a plurality of corrugated or zigzag shaped steel cords extending along the tire circumferential direction, satisfying at least the relations represented by the following expressions: ?0.5?L1/L2?0.5, L2?0 When the residual stress is a tensile stress, the stress is a positive value, and when the residual stress is a compressive stress, the stress is a negative value. Also, when the steel cords of the circumferential belt are taken out, at the inside and the outside of bent portions of the steel cords which are taken out, the residual stress at the inside of bent portions of the filament of a sheath portion is L1 and the residual stress at the outside of bent portions of the filament of the sheath portion is L2.

Abstract: Disclosed is a PET tire cord which has a flat spot index (FSI) defined by the following Calculation Formula 1 of 5.0% or less: Flat Spot Index (FSI) (%)=(L1?L2)/L0×100??Calculation Formula 1 wherein, L0 is an initial length of the tire cord, L1 is a length of the tire cord that is measured after providing a load corresponding to 13% of the strength at break of the cord for 5 minutes at 120° C. and cooling the same to 24° C. while maintaining the load, and L2 is a length of the tire cord that is measured after providing a load corresponding to 13% of the strength at break of the cord for 5 minutes at 120° C. and cooling the same to 24° C. while remaining the load of 0.01 g/d only.

Abstract: A puncture resistant pneumatic tire has a tread portion and a pair of lateral tread edges. A belt package is located radially inward of the tread portion and a carcass structure has at least one body ply which extends between and is turned up around a pair of bead cores. A protective band extends circumferentially about the tire radially beneath the tread portion and includes a plurality of circumferentially spaced metal rods, each of which extends in a lateral direction between the tread edges. The protective band may be located radially inward or outward of a spiral ply layer and the rods may be arranged in a staggered laterally offset layered relationship. The rods have a circular cross-section with a diameter of between 1/16 inch and ¼ inch and a length of between 7 inches and 8 inches and will deflect and dislodge the pointed end of road debris before it completely punctures the tire.

Abstract: Provided is a pneumatic radial tire including a carcass layer composed of a carcass ply 12 and a spiral belt layer 26 composed of steel cords wound spirally substantially in parallel with each other to a tire equator surface. When the ratio of spacing R1 between adjacent steel cords of the spiral belt layer 26 is shown by R1=(50?E×ds)/50, the ratio of spacing R1 is 0.45 or less as well as the total sectional area S of the steel cords applied per 50 mm width of the spiral belt layer is 7.5 mm2 or less (E shows the number of steel cords applied per 50 mm width of the spiral belt layer, and ds shows the diameter (mm) of each steel cord). The number of steel cords E applied per 50 mm of width ranges from 66 to 200.

Abstract: The invention relates to bicycle tires with at least one reinforcement layer (3) that contains strength supports and that is arranged between carcass (2) and tread rubber (4) and/or between the carcass layers below the tread rubber (4) and/or within the tread rubber (4). For a high resistance to puncturing with low weight, the reinforcement layer (3) contains multifilament threads of more than 30 polyester/polyarylate filaments, whereby the filaments are spun from molten liquid-crystal polymer.

Abstract: An aircraft tire inflated to high pressure and including a tread and a crown reinforcement in the form of composite textile cables which form at least one twin ply of two layers of crossed elements obtained by winding, in a zigzag around a cylindrical support and from one edge of the crown reinforcement to the other, a strip of at least one reinforcement until the two layers of crossed elements form angles of opposing directions of between 8° and 30° with the circumferential direction.

Abstract: A pneumatic tire including a carcass layer mounted between a pair of bead portions, at least two layers of a belt layer disposed on an outer circumferential side of the carcass layer corresponding to a tread portion, and a belt reinforcing layer having a strip material including at least one fiber cord wrapped spirally in a tire circumferential direction on an outer circumferential side of the belt layers, wherein the belt reinforcing layer has a center portion reinforcing layer for reinforcing a center portion of the belt layers and edge portion reinforcing layers for reinforcing edge portions of the belt layers, the center portion reinforcing layer and the edge portion reinforcing layers are mutually separated, a width of the center portion reinforcing layer is from 5% to 25% of a width of a belt layer having a smallest width, and a width of the edge portion reinforcing layers is from 10% to 35% of the width of the belt layer having the smallest width.

Abstract: A pneumatic radial tire is provided which can realize superior high-speed durability and low rolling resistance without causing other problems such as increase in the production cost and increase in the tire weight. A pneumatic radial tire 10 comprising: a bead core 1 provided in each of a left-and-right pair of bead portions 11; a carcass ply 2 extending from a crown portion 12 to both bead portions 11 via both side wall portions 13 and anchored to the bead cores 1, the carcass ply 2 comprising a radial cord layer; a belt 3 arranged in the outside of the crown portion in the radial direction; a belt reinforcing layer 4 arranged in the outside thereof almost in the equatorial direction of the tire; and a tread 5 arranged in the outside thereof. The fiber cords forming the belt reinforcing layer 4 are single-twist cords comprising a combination of different types of fibers.

Abstract: In a tire for a heavy load in which a belt is formed by laminating rubber-coated cord layers prepared by embedding steel cords in a coating rubber, an end part of at least one rubber-coated cord layer or an end part of the belt is coated with a rubber composition containing trans-polybutadiene (TRBR) and bismaleimide (BMI) in the following compounding amounts based on 100 parts by mass of a rubber component containing natural rubber and isoprene rubber: 0.1 part by mass?TRBR+BMI?0.0 parts by mass TRBR/(TRBR+BMI)?25% whereby cracks originating from separation between the steel cords at an end part of the belt and the coating rubber are prevented from being generated.

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): ???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: The present invention relates to an undrawn PET fiber and a drawn PET fiber those can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, and a tire cord including the same. The undrawn PET fiber may be a fiber of which the crystallinity is 25% or more, the birefringence index is 0.085 to 0.11, the amorphous orientation factor (AOF) is 0.15 or less, and the melting temperature (Tm) is 258° C. or more.

Abstract: Metal cord (C-1) having two layers (Ci, Ce) of 3+N construction, rubberized in situ, comprising an inner layer (Ci) formed from three core wires (10) of diameter d1 wound together in a helix with a pitch p1 and an outer layer (Ce) of N wires (11) N varying from 6 to 12, of diameter d2, which are wound together in a helix with a pitch p2 around the inner layer (Ci), wherein said cord has the following characteristics (d1, d2, p1 and p2 are expressed in mm): 0.20<d1<0.50; 0.20<d2<0.50; p1/p2?1; 5<p1<30; 10<p2<30; the inner layer is sheathed with a diene rubber composition called a “filling rubber” (12) which, for any length of cord of at least 2 cm, is present in the central channel (13) formed by the three core wires and in each of the gaps lying between the three core wires (10) and the N wires (11) of the outer layer (Ce); and the content of filling rubber in the cord is between 5 and 30 mg per g of cord.

Abstract: There is provided a polyester fiber which has few defects such as voids due to catalyst particles, and low variation in physical properties and minimal fluff generation. The polyester fiber of the invention comprises laminar nanoparticles composed of a divalent metal and a phosphorus compound and having side lengths of 5-100 nm and an interlayer spacing of 1-5 nm. There are also provided a tire cord, tire, belt-reinforcing fiber material and belt, comprising the polyester fiber.

Abstract: Provided is a pneumatic tire for heavy loads in which durability and a desired rigidity in circumferential direction are simultaneously attained while achieving a reduction in the tire weight. The present invention is a pneumatic tire for heavy loads having at least one layer of steel belt in which a plurality of steel cords 1, each of which is constituted by a plurality of intertwisted filaments 11, are arranged in parallel in the form of bundles. In the pneumatic tire for heavy loads, the height of cord bundles 2, that is, the minor axis (A) (mm) of the steel cords 1 and the bundle width (B) (mm), satisfy the relationship represented by the following Formula (1): B/A?2.0??(1), and at the same time, the value of S=B/(B+D), which is defined by the bundle width (B) (mm) of the cord bundles 2 and the distance (D) (mm) between the cord bundles, satisfies the relationship represented by the following Formula (2): 0.60?S?0.80??(2).