Abstract: A pneumatic tire comprises the following belt (A) or belt (B). The belt (A) comprises a ply made of waved monofilament steel cords and a ply made of multi-filament steel cords, wherein the waved monofilament steel cord is (1) spirally waved so that the wave pitches PA are in a range of from 14 to 50 mm and the amplitude HA of each wave is in a range of from 0.002 to 0.02 times the pitch PA of the wave, or (2) two-dimensionally waved so that the wave pitches PB are in a range of from 5 to 50 mm, and the amplitude HB of each wave is in a range of from 0.002 to 0.05 times the pitch PB of the wave. The belt (B) comprises two plies made of waved monofilament steel cords, wherein the waved monofilament steel cord is waved so that the wave pitches P are in a range of from 0.008 to 0.08 times the circumference of the tire and the wave height of each wave is in a range of from 0.002 to 0.025 times the pitch P of the wave.

Abstract: High modulus reinforcement is used to make a radial ply pneumatic tire having only one carcass ply, i.e. a monoply tire. Poly-ethylene naphthalate (PEN) reinforcement is prepared in a manner that provides sufficient strength whereby the monoply tire can be made having reduced weight (as compared to a two ply tire) while having comparable durability, some improved handling, reduced rolling resistance, and improved flatspotting properties.

Abstract: A tire steel cord which is produced by coating the surface of a brass-plated steel cord with a compound selected from the group consisting of 2-amino-4,6-dimethoxy pyrimidine, 3,5-dimethoxybenzoic acid and m-anisic acid, is disclosed. The tire steel cord has excellent initial and aged adhesion to rubber, improved rubber coverage and controlled oxidation rate on its surface.

Abstract: This invention discloses a rubbery polymer which is comprised of repeat units that are derived from (1) at least one conjugated diolefin monomer, and (2) at least one functionalized monomer having of the structural formula: wherein R represents an alkyl group containing from 1 to 15 about 10 carbon atoms or a hydrogen atom, and wherein R1 and R2 can be the same or different and represent hydrogen atoms or a moiety selected from the group consisting of wherein R3 groups can be the same or different and represent alkyl groups containing from 1 to about 10 carbon atoms, aryl groups, allyl groups, and alkyloxy groups of the structural formula —(CH2)y—O—(CH2)z—CH3, wherein Z represents a nitrogen containing heterocyclic compound, wherein R4 represents a member selected from the group consisting of alkyl groups containing from 1 to about 10 carbon atoms, aryl groups, and allyl groups, and wherein n, x, y and z represents integers from 1 to about 10, with t

Abstract: A pneumatic tire comprises a cord-reinforced layer such as carcass, belt, bead reinforcing layer which is made of metallic cords, each metallic cord is made up of six to twelve metallic filaments whose diameter is in a range of from 0.15 to 0.45 mm, the metallic filaments include waved filaments and unwaved filaments, each waved filament is two-dimensionally waved at a wave pitch and wave height before twisted, the wave pitch is in a range of from 5.0 to 35.0 times the diameter of the filament, and the wave height is in a range of from 0.2 to 4.0 times the diameter of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments are each subjected to a certain rotation around its axial.

Abstract: The present invention is directed to a hybrid cabled cord comprising: at least two yarns having different properties and an unbalanced configuration wherein the hybrid cabled cord has improved tensile strength retention. In a preferred embodiment one of the two yarns comprises polyethylene terephthalate and the second of at least two yarns comprises polyethylene naphthalate and the coring level is between about 3% to about 15%. The present invention is also directed to a process for making a hybrid cabled cord comprising the steps of supplying at least two yarns having different properties to a direct cabler, and cabling the at least two yarns using the direct cabler to achieve a hybrid cabled cord having a coring level which is not zero. The present hybrid cabled cord may be used in tire cord for rubber reinforcement in passenger car tires, van tires, light truck tires, or motorcycle tires.

Abstract: An aircraft tire, the inflation pressure of which is greater than 12 bar, comprises a crown, two sidewalls and two beads, a carcass reinforcement anchored in the two beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus.

Abstract: A metal cord for reinforcing rubber articles and a pneumatic tire including metal cords to reinforce tire components such as carcass, breaker and band are disclosed, wherein a metal cord according to one aspect of the present invention comprises filaments having a tensile strength of from 4000 to 5500 N/sq.mm and a diameter of from 0.10 to 0.35 mm and the filaments are twisted together, the filaments before twisted are two-dimensionally waved so that the elongation after fracture of the cord becomes in a range of from 2 to 6%. According to another aspect of the present invention, the metal cord is a single filament having a tensile strength of from 4000 to 5500 N/sq.mm and a diameter D of from 0.10 to 0.35 mm, and the filament is two-dimensionally waved so that the elongation after fracture becomes in a range of from 2 to 6%.

Abstract: The present invention relates to a pneumatic tire for a bicycle, especially a mountain bike, the tire having on each respective left and right side a bead each comprising a bead core. A carcass, preferably a diagonal carcass, which has at least one ply of cords, is wound about each bead core. The tire of the present invention also comprises sidewalls extending radially from the axial edges of its tread which each have a textile sheet structure for wear protection on the outer sides of the carcasses.

Abstract: A pneumatic tire comprises a carcass comprised of one or more carcass plies and a belt disposed on an outer periphery side of a crown portion of the carcass and comprised of one or more belt layers, wherein each of at least one carcass ply and at least one belt layer is constituted with organic fiber cords having a modulus of elasticity within a specified range.

Abstract: The invention relates to a bracing ply comprising reinforcing elements, which are made of steel cords, for a vehicle pneumatic tire, in particular, for a pneumatic tire used on transporters or light trucks and reinforced pneumatic tires. Said bracing ply is provided with two steel cord plies (bracing plies) which are stacked in a radial direction, whereby the radially inner steel cord ply is wider in the axial direction of the tire than the radially outer steel cord ply. In addition, the individual steel cords of a ply run diagonally with a slope ranging from 18° to 25° with regard to the zenithal plane of the tire. The radially inner and the radially outer steel cord plies have opposed slopes, are comprised of individual filaments with a filament diameter of 0.32 mm, and are provided with a U+T structure (untwisted+twisted), whereby the radial distance between steel cord plies is smaller in the zenithal plane of the tire than in the shoulder areas.

Abstract: A tire includes a toroidal carcass and a tread band. The toroidal carcass includes a central crown and two sidewalls terminating in a pair of annular beads. Each annular bead includes a metallic bead core for anchoring to corresponding bead seats of a wheel rim. The metallic bead cores include at least one annular portion made of a material having characteristics of superelasticity and shape memory. The material having characteristics of superelasticity and shape memory is deformable at ambient temperature in response to a constant force and recovers to an original shape upon removal of the constant force to facilitate mounting the tire on the wheel rim. The wheel rim includes a central cylindrical channel from which branches off, axially and outwardly, from opposite sides, diverging surfaces each terminating in a peripheral flange. The diverging surfaces form the bead seats for respective annular beads of the tire.

Abstract: A rubberized reinforcing fabric for articles made from elastomeric material includes a plurality of textile cords having at least tensile strength, parallel and adjacent to each other in a same direction, and incorporated in an elastomeric material The cords have a count between 420/2 dTex and 840/2 dTex, a diameter between 0.33 mm and 0.47 mm, and are embedded in the fabric. The fabric has a thickness of not more than 0.8 mm and a density between 125 cords/dm and 280 cords/dm. The cords constitute a maximum of 40% of a volume of the fabric. An article made from elastomeric material, including at least one rubberized reinforcing fabric made from elastomeric material, is also disclosed.

Abstract: A heavy duty pneumatic tire has a belt disposed radially outside a carcass and radially inside a tread portion, the belt having at least one ply of at least one high-elongation steel cord, the high elongation steel cord is formed by twisting at least three waving steel filaments together to form a core and a sheath surrounding the core, the waving filaments change place repeatedly along the longitudinal direction of the cord such that one of the filaments forms the core in a portion, but in a different portion of the cord, the same filament forms part of the sheath, thereby defining a plurality of first parts with the core and a plurality of second parts without the core which are disposed alternately in the longitudinal direction of the cord, and the elongation at break of the high-elongation steel cord is in the range of from 4 to 10%, whereby the resistance to breakage of the steel belt cords is improved and it becomes possible to decrease the belt weight without deteriorating various performances.

Abstract: A pneumatic vehicle tire of radial construction, especially for automobiles, is provided. The tire has a profiled tread strip, a belt structure of at least two belt plies, bead regions having bead cores, and a carcass having load-carrying members of steel cord. In the tire the carcass forms a C-ply construction and contains steel cords of three or five steel filaments, which all have the same diameter of 0.12 to 0.1 5mm.

Abstract: A reinforcing cord for a belt ply or a carcass ply of a pneumatic vehicle tire is provided and comprises a core filament and four to six ply filaments. The core filament is comprised of an elastically or plastically deformable polymeric material, or is encased with such a material, which fills the space surrounded by the ply filaments and/or penetrates into the gaps between the ply filaments.

Abstract: A tire carcass structure includes at least one carcass ply and a pair of annular reinforcing structures. The at least one carcass ply includes a first and second series of strip segments. Each strip segment extends around a cross-section profile of the carcass structure to define two lateral portions and an annulus portion. Each annular reinforcing structure includes at least one primary portion and at least one additional portion. The at least one primary portion includes a first circumferentially-inextensible annular insert and a filling body. The at least one additional portion includes at least one second circumferentially-inextensible annular insert. The first annular insert and the at least one second annular insert include one or more elongated elements extending in substantially-concentric turns. A radial extension of the at least one second annular insert is less than a radial extension of the first annular insert.

Abstract: A pneumatic tire comprises a belt disposed radially outside a carcass in a tread portion, the belt comprising two cross plies of monofilament metallic cords laid at angles of from 15 to 30 degrees with respect to the circumferential direction of the tire, each monofilament cord composed of a waved single filament, the filament having a circular sectional shape having a diameter in a range of from 0.40 to 0.50 mm, or alternatively a non-circular sectional shape having an aspect ratio in a range of from 0.65 to 0.95 and a cross-sectional area in a range of 0.09 to 0.20 sq.mm.

Abstract: As the present invention there is disclosed a pneumatic radial tire comprising a carcass having a smaller tensile rigidity than that of conventional pneumatic radial tires by application of a steel cord having a smaller Young's modulus to the carcass or by application of a smaller amount of a high strength steel cord formed with carcass filaments having a greater tensile strength to the carcass while maintaining the necessary strength of the carcass. In accordance with the present invention, extension of the carcass increases and extension of a belt in the circumferential direction of the tire is suppressed when the tire is inflated by an inner pressure. As a result, compression stress working on the carcass when a vehicle turns decreases and buckling deformation of the steel cord can be prevented. Accordingly, durability is improved.

Abstract: A method for constructing an elastomeric composite ply comprises using parallel S and Z twisted cords to reinforce an elastomeric matrix. The S and Z cords are made inexpensively by using a yarn twist that is less than the cord twist. Composite plies made by the method can be used in elastomeric articles such as tires.

Abstract: A pneumatic tire comprises a belt disposed radially outside a carcass in a tread portion, the belt comprising two cross plies of monofilament metallic cords laid at angles of from 15 to 30 degrees with respect to the circumferential direction of the tire, each monofilament cord composed of a waved single filament, the filament having a circular sectional shape having a diameter in a range of from 0.40 to 0.50 mm, or alternatively a non-circular sectional shape having an aspect ratio in a range of from 0.65 to 0.95 and a cross-sectional area in a range of 0.09 to 0.20 sq.mm.

Abstract: Described in the present invention is a high strength polyethylene naphthalate fiber which provides a treated cord having high tenacity and improved dimensional stability that can be advantageously employed as a fibrous reinforcement material of rubber products such as tires and belts.

Abstract: This invention relates to a method of promoting the adhesion of textiles to rubber compounds through a vinyl compound plasma pre-treatment procedure and a subsequent application of resorcinol-formaldehyde latex (RFL) to the textile surface. The inventive method encompasses a process through which free radicals of compounds comprising strong carbon-carbon bonds form a film over textile films and then covalently bonded to the resin component of the RFL. Such a method thus produces an extremely strong and versatile adhesive that facilitates adhesion between rubber compounds and heretofore unusable or difficult-to-use textiles. The resultant textile/rubber composites are utilized as reinforcements within such materials as automobile tires, fan belts, conveyor belts, and the like. Such materials and composites are also contemplated within this invention.

Abstract: A radial medium radial truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In one embodiment, organic monofilaments are used in the belt or breaker plies which have the following characteristics: at least 2,000 denier (2,200 dTex), a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 30 g/denier (265 cN/Tex) and a shrinkage of at most 6%. When an organic polymer reinforcement is used in the top belt or breaker in the belt package of a tire, scrapping of tires during a retreading operation because of corrosion is greatly reduced. In addition, acceptance for retreadability is increased because of reduced top belt or breaker damage, allowing for easier preparation for the retreading.

Abstract: A tire comprising at least one reinforcement structure of the carcass type anchored on either side of the tire in a bead, the base of which bead is intended to be mounted on a rim seat, the reinforcement structure extending circumferentially from the bead towards the sidewall, at least one arrangement of main cords along a substantially circumferential path being arranged substantially adjacent to the structure, the arrangement of the cords of the at least one arrangement being such that the number of main cords arranged on the axially inner side relative to the structure is greater than the number of main cords arranged on the axially outer side relative to the structure.

Abstract: A radial medium truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In one embodiment, organic monofilaments are used in the belt or breaker plies which have the following characteristics: at least 2,000 denier (2,200 dTex), a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 30 g/denier (265 cN/Tex) and a shrinkage of at most 6%.

Abstract: A steel cord particularly adapted for reinforcement of a protection ply in a tire has under compression in rubber a deformation Wk at instability of at least 3% and is stress-relieved so that its total elongation at rupture in rubber exceeds 3.5%. The steel cord comprises pearlite filaments.

Abstract: A rubberized fabric for a tire belt incorporating continuous reinforcing elements made from a shape-memory material and a tire incorporating same. The rubberized fabric forms the zero-degree belt layer of the tire. The fundamental characteristic of the fabric resides in its incorporation of means to stabilize the reinforcing elements in the predetermined position within the fabric. Stabilization of the reinforcing elements is accomplished by shaping the reinforcing elements in the form of side-by-side metal straps. The minimum width of each metal strap is about I mm and the thickness of the rubberized fabric incorporating the metal straps has a maximum value of about 0.4 mm and is preferably about 0.3 mm. Among other things, the rubberized fabric improves the vulcanization process of the tire by constraining the underlying belt layers, lessens the consequences of “flatspotting,” and permits the construction of a lighter weight tire.

Abstract: The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterised in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of salt of these compounds, the additive being such that the pH of the said coagulating agent is greater than 6. A preferable additive is a salt elected from the group consisting of ammnonium formates, acetates and phosphates, mixed salts of these compounds, or mixtures of these constituents, in particular diammonium orthophosphates (NH4)2HPO4. The invention also concerns a method for spinning a liquid crystal solution with a base of cellulose substances, using a coagulating agent as per the invention, in particular the method called the “dry-jet-wet-spinning” as well as spun articles, fibers or films, obtained by these methods.

Abstract: A method for constructing an elastomeric composite ply comprises using parallel S and Z twisted cords to reinforce an elastomeric matrix. The S and Z cords are made inexpensively by using a yarn twist that is less than the cord twist. Composite plies made by the method can be used in elastomeric articles such as tires.

Abstract: A cord for a tyre includes a strand of metallic core threads and at least two shells of metallic threads arranged around the core strand; the threads of the core strand and of the shells are wound helicoidally and have a “Lang Lay” type winding.

Abstract: The object is to provide a carbon fiber-reinforced rubber material which is superior in heat resistance, water resistance, and dimensional stability and exhibits resistance to fatigue from flexing at a practical level. The present invention relates to a prepreg comprising a liquid rubber composition having a viscosity in a range of 0.01 Pa·s to 100 Pa·s at 70° C. and substantially containing no solvent, the liquid rubber being impregnated into a reinforcing fiber, and relates to a fiber-reinforced rubber material comprising the prepreg in which the liquid rubber is crosslinked. Also, the present invention relates to a fiber-reinforced rubber material comprising a substrate comprising a rubber component, the substrate being reinforced by a core material comprising a prepreg of a reinforcing fiber impregnated with the same rubber component.

Abstract: A method of manufacturing a pneumatic tire comprises making a rubber-coated cord-member by coating one or more cords with rubber, and making the tread reinforcement by putting together a plurality of the cord-members around a drum into a cylindrical network of the cords, so that the cords make a first array of cords inclining in one direction with respect to the tire equator and a second array of cords inclining in one direction which is opposite to the cords of the first array with respect to the tire equator.

Abstract: The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterised in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of salt of these compounds, the additive being such that the pH of the said coagulating agent is greater than 6. A preferable additive is a salt elected from the group consisting of ammonium formates, acetates and phosphates, mixed salts of these compounds, or mixtures of these constituents, in particular diammonium orthophosphates (NH4)2 HPO4. The invention also concerns a method for spinning a liquid crystal solution with a base of cellulose substances, using a coagulating agent as per the invention, in particular the method called the “dry-jet-wet-spinning” as well as spun articles, fibers or films, obtained by these methods.

Abstract: Steel cord is manufactured by: forming a plurality of bends, per filament length equivalent to one twist pitch, on each of filaments which constitute an outer layer sheath, with the filament length equivalent to one twist pitch being a cycle; twisting these filaments while the bends belonging to the same phase are aligned in a cord axial direction; and subjecting cord side surfaces to compression processing. As a result, flat side surface portions are formed, in which a plurality of filaments forming the outer layer sheath are positioned substantially in the same plane. The steel cord thus formed is used in reinforcement plies for pneumatic radial tires such that the reinforcement plies are laminated in a manner in which the flat side surface portions are mutually parallel.

Abstract: The invention can improve rubber permeability and a fatigue resistance in a metal cord in a layer structure. There is formed layer structure in which a sheath (3) constituted by 1 to 6 filaments (Fb) is formed around a core constituted by 1 filament (Fa). The filament (Fa) is constituted by a waved filament (5) waved in a two-dimensional wave shape in a state before being bundled, and is twisted with the sheath while applying the torsion so as to be formed in a three-dimensional wave shape within a cord.

Abstract: The present invention provides a stainless steel wire for a carcass of a tire and a process for making such a wire. The wire comprises at least 0.02% and at most 0.2% carbon, at least 3% and at most 20% nickel, at least 12% and at most 28% chromium, the sum of the nickel and chromium being at least equal to 20% and at most 35% (% in weight). The structure of the steel comprises at least 20% in volume of martensite and it is devoid of austenite or it comprises less than 80% of it in volume.

Abstract: There is provided a rubber composition for breaker cushion excellent in elongation at break strength at break after aging with maintaining control stability, and a truck and bus tire using the rubber composition. A rubber composition for breaker cushion comprises 1,3-bis(citraconimidomethyl)benzene and 25 to 35 parts by weight of carbon black having a nitrogen adsorption specific surface area of 70 to 120 cm2/g based on 100 parts by weight of a rubber component.

Abstract: A rubber reinforcing steel cord of a bundle-twisted+layer-twisted structure obtained by arranging 9 steel filaments around 3 steel filaments each being two-dimensionally wave-like shaped in the lengthwise direction, intertwining all of these steel filaments in one operation to form a bundle-twisted cord, and further arranging 14 steel filaments around the bundle-twisted cord followed by intertwining. Also, a heavy duty pneumatic radial tire using the rubber reinforcing steel cord as the cord of the carcass layer thereof.

Abstract: A tire includes a carcass; a tread band on the carcass; a belt, positioned between the tread band and the carcass, including at least one layer of rubberized fabric; and at least one reinforcing metal strap in the at least one layer of rubberized fabric. The at least one reinforcing metal strap is made of a shape-memory material oriented at about 0° to an equatorial plane of the tire. The at least one reinforcing metal strap has a width of no less than about 1 mm. And the at least one reinforcing metal strap has coils disposed side-by-side in a direction substantially perpendicular to a radius of the tire.

Abstract: A process for manufacturing continuous polyester filament yarn for technical applications from a polymer over 90% of the chains of which are composed of ethylene terephthalate units, via a one-step spinning process, with the undrawn filaments having a crystallinity smaller than 16% and the yarn being wound at a rate larger than 6000 m/min. The yarn obtained in this fashion is particularly suitable for use as reinforcing material in rubber articles, notably as reinforcing material in pneumatic tires for cars.

Abstract: A rubber-based composite material is provided, which can enhance the adhesiveness between a non-woven fabric and a rubber. The use of the rubber-based composite material as a reinforcing material for rubber articles such as tires and belts can enhance the durability of the rubber articles and can reduce the weight of the articles. The rubber-based composite material is composed of a non-woven fabric, a coating of a metal or metallic compound reactable with sulfur, and a rubber that adheres to the coating and that covers the non-woven fabric. The coating is formed on a surface of the filaments constituting the non-woven fabric by a physical vapor deposition (PVD) method or a chemical vapor deposition (CVD) method.

Abstract: A steel cord for a tire which increases a corrosion resistance and durability and improves the energy efficiency during curing of the tire and a radial tire using the same. This steel cord has an m+n twist structure comprising a core containing m pieces of wires and a sheath containing n pieces of wires, in which a rubber compound or an elastomer compound is filled into a space between the core and the sheath. Otherwise, the steel cord has a 1×N twist structure containing N pieces of wires, in which a rubber compound or an elastomer compound is filled into a space at a cord center surrounded by the N pieces of wires.

Abstract: In a road vehicle tire, a two-part layer (2) of elastomeric material is preassembled by co-extruding a first and a second strip (19, 16) through a preforming plate die (26), through which extends at least one pair (27) of tapered flow channels (25a, 25b) having offset, side by side inlets (28, 29) with respective superimposed adjacent lateral portions (30, 32), and substantially coplanar outlets (33, 34) with respective adjacent lateral portions (35, 38) interconnected to define, between the two strips (19, 16), an L-shaped joint (20) wherein a lateral portion (21) of the second strip (16) has an edge (17) substantially contacting a lateral shoulder (22) of the first strip (19), and is superimposed on a thin annular appendix (23) projecting from the shoulder (22) of the first strip (19).

Abstract: The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterized in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of salt of these compounds, the additive being such that the pH of the said coagulating agent is greater than 6. A preferable additive is a salt selected from the group consisting of ammonium formates, acetates and phosphates, mixed salts of these compounds, or mixtures of these constituents, in particular diammonium orthophosphates (NH4) 2 HPO4. The invention also concerns a method for spinning a liquid crystal solution with a base of cellulose substances, using a coagulating agent as per the invention, in particular the method called “dry-jet-wet-spinning” as well as spun articles, fibers or films, obtained by these methods.

Abstract: A process for manufacturing continuous polyester filament yarn for technical applications from a polymer over 90% of the chains of which are composed of ethylene terephthalate units, via a one-step spinning process, with the undrawn filaments having a crystallinity smaller than 16% and the yarn being wound at a rate larger than 6000 m/min. The yarn obtained in this fashion is particularly suitable for use as reinforcing material in rubber articles, notably as reinforcing material in pneumatic tires for cars. The polyester filament yarn can be used to make cords of uncommonly high dimensional stability and a unique combination of breaking tenacity, shrinkage, and breaking toughness.

Abstract: A rubber-steel cord composite comprising a steel cord having, in a planar image of the steel cord formed by X-rays passing through the steel cord, a fraction R of the total area occupied by filaments of from 0.45 or more to 0.95 or less in an arbitrarily selected portion of the steel cord having a length of 15 mm in an axial direction of the cord, is provided. The length of 15 mm in an axial direction of the cord means a length of 15 mm in an axial direction of an actual cord and the fraction R of the total area occupied by the filaments is expressed as R=F/A, wherein A represents the total area of the cord and F represents the area of the cord occupied by the filaments.

Abstract: The present invention relates to a metallic cord for the reinforcement of elastomers. The cord has (a) a core composed of two filaments, (b) a single filament surrounding said core and (c) a sheath of nine filaments surrounding said core and single filament.

Abstract: In the pneumatic tire of this invention, at least the outermost one of a plurality of rubber layers between the carcass and tread has been reinforced with a plurality of steel cords. Each of these steel cords is a single-strand steel cord with an elongation at break of not less than 4% and at least one of its component wires does not form a common circumcircle with the remaining wires. The curve circumscribing the cross-sections of the constituent wires of each steel cord is not a true circle. Furthermore, a high resistance to nail penetration is assured by arranging the steel cords in such a manner that, for a large majority of steel cords, the direction of maximum offset span of the circumscribing curve is substantially coincidental with the width direction of the outermost layer of rubber.

Abstract: Polyvinyl alcohol based fibers having good fatigue resistance, dipped cords comprising the polyvinyl alcohol based fibers and having good fatigue resistance, and a method for producing the dipped cords. The polyvinyl alcohol based fibers have a tan&dgr; at 90° C. of at least 0.12, substantially one peak of tan&dgr; within a temperature range of from 60 to 120° C., and an elongation at break of at least 12%.