Abstract: A pneumatic tire is reinforced with cords made of polyvinyl alcohol based fibers, and meets the following requirements:(1) A tenacity, S (g/d) of the cords taken out from the tire meets a relation: S.gtoreq.14.5-12N.sub.T in which N.sub.T is a coefficient of twist, which is represented by N.sub.T =N.times..sqroot.0.139.times.D/.rho..times.10-3. N, D and .rho. are a number of twist (turns/10 cm), a half of a total denier of the cords, and a specific density of the cords, respectively.(2) A tenacity-retaining percentage of the cords in an absolutely dried state is not less than 90% of that before the treatment with boiling water. The absolutely dried state means that after the cord is treated with boiling water at 120.degree. C. while being maintained at a constant length, the cord is dried.

Abstract: A pneumatic tire has a carcass which is formed, at least in part, of a regenerated cellulose fiber. The fiber is formed of at least one filament having a base of cellulose and/or at least one cellulose derivative containing cellulose ester groups, at least a part of these ester groups being formate groups.

Abstract: A steel cord for the reinforcement of rubber articles is disclosed, which comprises a central base structure composed of 1 to 4 steel filaments, and at least one coaxial layer composed of plural steel filaments arranged around the central base structure so as to adjoin them to each other, these steel filaments being twisted in the same direction at the same pitch. In the steel cord of this type, the steel filaments constituting the central base structure have the same diameter (dc), while at least one steel filament of the coaxial layer has a diameter (dso) smaller than the diameter (dc) of the steel filament in the central base structure.

Abstract: Very high strength cords are made and described which are composed of a core and a sheath of twisted yarns plied around the core in such a way that the cord exhibits greatly improved retained strength after use.

Abstract: Pneumatic radial tires for load vehicles include carcass plies reinforced with composite twisted filaments having a core-sheath structure, the core being made of polyester and the sheath being made of polyamide. The sheath accounts for 40-60 wt % of the entire core-sheath structure, and the coefficient of twist K of the cords satisfies the condition 1.22<K<2.24 and the initial modulus Md (g/d) of the cords satisfies the condition Md>45.0.

Abstract: A reinforcing cable (40) comprises at least two yarns (41,42,43) each of which consists only of aramid filaments, and a single core yarn (44) which consists only of filaments selected from the group consisting of polyamides having a structure which is at least partially oriented and polyesters having a structure which is at least partially oriented. The aramid yarns (41,42,43) are adjacent to one another and twisted about the core yarn (44) to manufacture a cable (40), but the aramid yarns are not twisted about one another. Articles of manufacture, such as tires, which contain the new cables are also disclosed.

Abstract: A composite reinforcing rope is made of a cylindrical core of twisted filaments of aromatic polyamides around which a plurality of steel wires of a rectangular configuration are coiled. The steel wires are wound side-by-side in one layer. Each wire is twisted around its own axis to such a degree that its broader side fully engages the periphery of the polyamide core. The edges of respective wires are rounded whereby the convex narrow dides of adjoining wires contact one another substantially along a line.

Abstract: An pneumatic radial tire for a passenger car having an improved durability, which tire has a carcass layer formed of aromatic plyamide cords in which an end portion of the carcass layer is turned up around an annular bead wire and a lower bead filler from the inside to the outside of the tire to form a turnup portion which is extended along the main body of the carcass layer, wherein an upper bead filler having a JIS hardness of from 75 to 95 is disposed axially outside the turnup portion, and wherein the height b (mm) of the lower bead filler relative to the height a (mm) of a rim flange upon which the tire is mounted satisfies the formula:(a-5)<b<(a+10)wherein a is the G dimension specified by JIS-D-4218-1981.

Abstract: A radial tire improved in steering stability, durability and appearance comprising a nylon cord of high modulus and excellent dimensional stability obtained by impregnating a nylon cord substantially composed of polytetramethyleneadipamide with an adhesive and heat setting the nylon cord under a stretch state.

Abstract: A pneumatic tire is improved by use of carcass cords being made from aromatic polyamide fiber and having a twisting angle of 31.3 to 39.3 degree. Durability is much improved.

Abstract: A pneumatic radial tire, wherein each carcass ply contains a rubberized layer of load bearing polyamide monofilaments.

Abstract: A polyester fiber highly heat-resistant in a rubber matrix and useful as a reinforcing material for rubber articles, has a tensile strength of 8 g/d or more and is composed of a core portion made from a polyester resin and a skin portion made from a polyester resin and covering the core portion, the skin portion being in an amount of 5% to 20% based on the entire amount of the fiber and having a lower orientation and/or lower crystallinity than the core portion, which polyester fiber has been produced by treating a surface portion of a homogeneous polyester fiber consisting essentially of a polyester resin with a solvent capable of swelling the polyester resin or by coating a precursory polyester fiber for the core portion with a polyester resin for the skin portion.

Abstract: A radial ply pneumatic tire (10) has carcass plies (13,14,15) reinforced by cables comprising only yarns of aramid filaments, and belt plies (31-35) reinforced by cables comprising at least two yarns of aramid filaments and a core yarn consisting of at least one polyamide or polyester filament which have at least a partially oriented structure, said aramid yarns being adjacent to one another and twisted about said core yarn but not being twisted together with one another.

Abstract: Textile cables (10) used for reinforcing tires comprise a plurality of yarns (11, 12, 13) which each consist of a plurality of aramid filaments (14) and each yarn has a twist imparted thereto. The yarns (11, 12, 13) are twisted together with one another to form cables (10). The twist ratio and the twist multiplier of the cable are dependent upon the intended end use of the cable. If the cable (10) is to be used in a high flex application, such as a reinforcing element in a carcass ply of a tire, the twist ratio is in the range of 1.0 to 1.9, and the twist multiplier is in the range of 8 to 12. If the cable (10) is to be used as a reinforcing element in the tread reinforcing structure of a tire, where there is some flexing but strength is very important, the twist ratio is in the range of 1.0 to 3.0, and the twist multiplier is in the range of 5 to 7. A preferred spacing between the cables is also disclosed.

Abstract: A steel cord comprises a central bundle of three twisted steel filaments (1) with a diameter d.sub.1 and nine steel filaments twisted around said central bundle with the same twist pitch and twist direction as the central bundle. Three filaments (2) of said nine steel filaments have a diameter d.sub.2 and contact two adjacent steel filaments of the central bundle. Six steel filaments (3) of said nine steel filaments have a diameter d.sub.3 and contact both one steel filament of the central bundle and one steel filament of the three filaments with diameter d.sub.2. The ratio d.sub.2 /d.sub.1 is greater than 1.05 and smaller than 1.16. The raio d.sub.3 /d.sub.1 is greater than-0.205=0.814.times.d.sub.2 /d.sub.1 and smaller than-0.105+0.814=d.sub.2 /d.sub.1.

Abstract: A steel cord usable for the reinforcement of rubber articles comprises a core of a single steel filament, an inner sheath composed of six steel filaments and an outer sheath composed of 7 to 12 steel filaments, wherein the steel filaments constituting the core, inner sheath and outer sheath have a diameter of 0.20.about.0.40 mm and satisfy the particular relations.

Abstract: A pneumatic tubeless tire is produced in such a way that the tire cord fabric (also known as the tire carcass fabric or ply fabric) has the ends thereof secured during tire building so that separation of the cord fabric ends, and a resulting blemish, does not occur. The carcass fabric is wrapped around a rubber inner lining body with turned up portions of the carcass fabric at a pair of beads on opposite sides of the body, during tire construction. The free ends of the carcass fabric are butted together around the body, to provide a butt seam. The free ends are held together in substantial butting position by placing an open mesh warp knit splicer fabric highly extensible in both the machine and cross-machine directions over the butt seam and affixing the splicer fabric in place using adhesive or the like. Rubber tack may be applied over the splicer fabric. The open mesh fabric appears to have no machine direction or cross-machine direction yarns, but only bias yarns.

Abstract: A radial tire for use in passenger cars is disclosed which is excellent in motion performance and durability. The tire has a carcass cord layer in which steel cords of a single strand construction represented by (1xn) in which n is a number of filament yarns and is an integer of from 1 to 5 are embedded in rubber. The thickness of the rubber between the adjacent steel cords is in a range between 0.80 and 2.00 mm when measured in a tire circumferential direction at a location having a tire maximum width in an arrangement of the steel cords in the carcass cord layer. A product (nxd.sup.4) between a number (m) of the filament yarns constituting the steel cord of the single strand construction and a diameter (d) of the filaments is in a range of 0.002 to 0.012. The diameter of the filaments is in a range between 0.15.ltoreq.d.ltoreq.0.25 mm.

Abstract: A steel cord comprising at least 10 metal filaments and having an elongation of 0.015-0.045% under a load of 0.5 kgf, an elongation of 0.025-0.060% under a load 1 kgf, and an elongation of 0.060-0.114% under a load of 4 kgf, assuming that the elongation under a load of 0.05 kgf is 0%, has a soft twist construction and is suitable to be used in the carcass of a radial tire for truck and bus.

Abstract: A pneumatic tire comprises an annular tread at a central portion, a pair of side wall portions, bead portions, a carcass extending between both bead wires, and a breaker composed of two or more cord layers with cords arranged at a cord angle of 5-60.degree. relative to the circumferential direction and between the tread and the carcass and intersecting in the adjacent plies. The cords constituting the carcass or the breaker are substantially made of polytetramethylene adipamide (4,6-nylon), and as buried in a rubber of the tire, have the following characteristics:5.0(%).ltoreq.E.sub.2 .ltoreq.9.0(%)E.sub.2 +.DELTA.S.ltoreq.13.0(%)where E.sub.2 is an elongation (%) at 2.0 g/d, and .DELTA.S is a heat shrinkability (%) when measured in the state that the cords are left at 177.degree. C. under application of load of 20 g/cord for 30 minutes and kept as it is. The burying rubber has the following characteristics:20 kg/cm.sup.2 .ltoreq.M.sub.100(%) .ltoreq.60 kg/cm.sup.2where M.sub.

Abstract: A pneumatic tire for a passenger car, wherein a carcass layer consists of two layers, cords of nylon 46 fiber are used as the carcass cords of each of these layers, and the cords of one of the layers cross those of the other layer at an angle of from 5.degree. to 40.degree.. A pneumatic tire for a passenger car, wherein a belt cover layer is disposed on a belt layer and cords of nylon 46 fiber is disposed as the cords of the belt cover layer on the belt layer.

Abstract: A radial ply pneumatic tire has at least two carcass reinforcing layers, each of which comprises two discontinuous plies. Each discontinuous ply is anchored around a single bead core and extends through a sidewall into the crown portion of the tire where it axially overlaps the tread reinforcing belt structure. The two discontinuous plies of each carcass layer are separated by a circumferentially extending gap, and the gaps in each carcass layer are staggered relative to one another as well as relative to the circumferentially extending grooves of the tire's tread pattern.

Abstract: A process for producing a pneumatic tire having high uniformity with a carcass ply formed of polyester cord, including the steps of: (a) spinning polyester at a tension at the solidifying point of melt polyester between 1.5.times.10.sup.7 and 7.5.times.10.sup.7 dyne/cm.sup.2 ; (b) drawing the polyester into a filament at a draw ration of 2.0 to 3.0; (c) twisting a polyester filament at a twist coefficient of from 800 to 2,500; and then (d) heat treating the filament so that the dimension unstabilizing factor is 8.5 or less. The polyester filament is made of polyester having an ethylene terephthalate component of at least 85 mol % and a high degree of polymerization such that the intrinsic viscosity is at least 0.8, and the ratio of the birefringence of the surface portion to that of the central portion in the polyester filament is from 1.03/1 to 1.15/1; the twist coefficient is represented by T.times..sqroot.

Abstract: A reinforcement assembly comprises from one to three layers of threads, one of which is a central layer having one or more shaped threads, i.e., threads having a center of gravity and a contour in an intersecting plane perpendicular to the longitudinal direction of the thread, the distance from any point on the contour to the center of gravity depending on the position of the point on the contour. The twist pitch of each shaped thread is different from the winding pitch of the shaped thread in the layer in which it is located and if the element comprises three layers, the winding pitch of the outer layer is different from the winding pitch of the subjacent layer. Reinforced articles include such assemblies impregnated with a material, in particular pneumatic tires.

Abstract: A pneumatic radial tire is disclosed, which comprises a toroidal tire body extending from bead portions to a crown portion through sidewall portions, and a reinforcement for the tire body consisting of a carcass composed of at least one cord ply containing polyester fiber cords therein, which cord ply being wound around a bead core embedded in each of the bead portions from the inside of the tire to the outside thereof, and a belt composed of at least two ply layers superimposed around the crown portion of the carcass and containing cords arranged at a relatively small inclination angle with respect to the mid-circumferential plane of the tire, the cords of which being crossed with each other. In this type of the tire, the carcass line of the tire body at a mounted state of the tire on a normal rim under a normal internal pressure depicts such a radial profile in tire section that a ratio of R/R' is within a range of 0.65-0.

Abstract: Heavy duty pneumatic radial tire which has the feature as follows: a pair of bead cores; a carcass ply which is composed of steel cords being turned up around the bead core from the inside toward the outside and disposed with respect to the radial direction; a belt layer whose cords are disposed at a comparative low angle with respect to the equatorial line of the tire and a steel cord reinforcing layer disposed adjacent to the outside of the turned up portion of the carcass ply, the height ho of the said turned up portion from the bead base portion is within a range of between 55 mm and 80 mm.The rubber thickness t which is between the carcass ply itself and its turned up portion, is at a certain height h from the bead base portion, t/h decreases gradually in inverse proportion to values of h/h0 within the range of 0.3.ltoreq.h/h0.ltoreq.0.5 or 0.3.ltoreq.h/h0.ltoreq.0.8, and takes an approximate constant value from 0.1 to 0.25 within the range of 1.0.ltoreq.h/h0>0.5 or 1.0.ltoreq.h/h0>0.8.

Abstract: A vehicle tire with an elastomeric carcass provided with at least one reinforcement at least partially formed from elements made of flat wire generally spirally wound in a plurality of coils.

Abstract: A reinforcing cord made of several steel wires includes a metal wrapping wire coiled around steel wires. The hardness of the wrapping wire is substantially less than the hardness of the steel wires. Preferably the wrapping wire is a flat wire whose longer side engages the cord.

Abstract: A pneumatic tire of which the durability of the turnup portions of a carcass layer is greatly improved. The tire consists of left and right bead portions, left and right side wall portions continuing from the bead portions, a tread positioned between the side wall portions, a carcass layer provided between the left and right bead portions so that a cord angle with respect to the circumferential direction the tire is 70.degree.-90.degree., and a belt reinforcement layer provided between the tread and carcass layer, characterized in that the carcass layer is formed by burying 20-60 aromatic polyamide fiber cords of 0.55-0.65 mm in diameter per 5 cm of the carcass layer in an equatorial plane in the tire in rubber coats of which a 100% modulus is 30-70 kg/cm.sup.2.

Abstract: A steel cord for reinforcing rubber products such as truck tires comprises a plurality of steel wires twisted together to form a multiwire layered cable construction having two or more successive wire layers around a common core. The wires of the outer layer are covered by a rubber adherable coating of, e.g. brass, and the wires (shaded) of the layer inwardly adjacent the surface layer are covered by a corrosion resistant coating, such as zinc or a zinc alloy.

Abstract: A rubber adherable ferrous substrate for use in reinforcing vulcanizable elastomeric products includes a cold worked steel wire having a brass alloy coating of specified compact structure on its surface. There is provided also a process for covering a steel wire substrate with a compact alloy coating, in particular a thin brass diffusion coating having a specified permeability.

Abstract: A reinforcement cable is formed of an assembly of strands. Each strand is formed of two wires wound around each other in the same direction, with a constant pitch whose length is less than 300 mm. The two wires have linear contact with each other in the form of a helix. These helices have the same direction and the same constant pitch length. The assembly is formed of two strands of the same length of pitch and wound in opposite directions and/or it is formed of two to four strands such that the assembly has the same length of pitch and wound in the same direction as one strand and, with respect to another strand, a different length of pitch and/or wound in an opposite direction.

Abstract: A pneumatic radial ply tire in which the body ply is formed of a low twist yarn having between three and six turns-per-inch. The body ply terminates in relatively low turn-up ends extending along the side walls a distance between 10% and 30% of the tire section height and out of the area of cyclic stress and oscillation in the side walls of the tire. A relatively high, wide and hard bead filler is located within a bead portion of the tire and has a height between 20% and 50% of the tire section height with a width of between 15% and 35% of the bead filler height. The bead filler has a hardness of between 75 and 98 on the Shore A scale. The ply yarn preferably is polyester and the individual low twist strands are arranged in a parallel relationship and is preferably free of transverse cross strands known as wefts or picks. The combination of low twist yarn, low turn-up body ply ends and bead filler size and hardness provides a tire having increased durability and uniformity at a lower cost.

Abstract: A steel cord, for use in the reinforcement of resilient articles such as rubber tyres, comprises a central bundle of wires surrounded by a circumferential layer of helicoidally twisted wires. In the central bundle, one can distinguish a core and a surrounding layer, the latter having the same twist pitch as the circumferential layer. In order to reduce wire migration, the wires of the central bundle show a limited number of relative position changes, between 2 and 300 per 30 cm cord length.

Abstract: A pneumatic radial tire having a high durability is disclosed, which comprises a carcass composed of at least one ply containing polyester fiber cords embedded in rubber. This polyester fiber cord has particular fiber properties and cord properties. Among the cord properties, the elongation under a tension of 2 g/D of the cord after the specific post-cure inflation treatment is not more than 4.5% and the sum of the elongation and heat shrinkage is not more than 8.0%.

Abstract: A high-durable pneumatic radial tire is disclosed using steel cords in at least one of the carcass and the belt. This steel cord is produced by twisting plural steel filaments each having a tensile strength of not less than 220 kgf/mm.sup.2, whose metallic structure being a fine pearlite structure having an average value of interlamellar distance between cementites of 300-500 .ANG. and an average sectional area of single pearlite crystal grain in filament section of not more than 20 .mu.m.sup.2.

Abstract: A steel cord for use in the reinforcement of resilient articles such as rubber tires has a core and one surrounding layer of wires, the diameter and twist pitch of the core wires being substantially different from the diameter and twist pitch of the wires of the layer surrounding the core. This construction eliminates wire migration without loss of reinforcing ability of the cord in the resilient material.

Abstract: A pneumatic radial ply tire in which the body ply is formed of a low twist yarn having between two and five turns-per-inch. The body ply terminates in relatively high turn-up ends extending along the side walls a distance between 35% and 65% of the tire section height and out of the area of cyclic stress and oscillation in the side walls of the tire. A relatively high, narrow and hard bead filler is located within a bead portion of the tire and has a height between 20% and 50% of the tire section height with a width of between 5% and 25% of the bead filler height. The bead filler has a hardness of between 75 and 98 on the Shore A scale. The ply yarn preferably is Nylon and the individual low twist strands are arranged in a parallel relationship and is preferably free of transverse cross strands known as wefts or picks. The combination of low twist yarn, high turn-up body ply ends and bead filler size and hardness provides a tire having increased durability and uniformity at a lower cost.

Abstract: A pneumatic tire for high-speed running type motorcycles is disclosed, which comprises a carcass of a bias structure composed of at least two plies each containing organic fiber cords, a tread portion of rubber, a breaker disposed between the carcass and tread and composed of at least one ply containing organic fiber cords, and a side portion of rubber. In the pneumatic tire, the carcass and breaker are arranged in substantially parallel with each other, and the carcass has a cord angle of 26.degree.-36.degree. with respect to the equatorial plane of the tire, and the breaker has a cord angle of 0.degree.-25.degree. with respect to the equatorial plane and extends at a width corresponding to 30-200% of the tread width.

Abstract: A reinforcing cord for use in radial tires, conveyor belts, hoses or driving belts, includes at least one strand of metal wires twisted along the longitudinal axis of the strand. Each metal wire has a substantially rectangular cross-section defining two opposite broad sides. The wires in the strand engage one another along their broad sides and preferably are wrapped around by a wrapping wire.

Abstract: A pneumatic radial tire comprising: (1) a cylindrical tread portion; (2) side portions located at both sides of the tread portion and extending inwardly in the radial direction; (3) bead portions located at the inner edge portions of the side portions; (4) a carcass comprising at least one ply which is reinforced with a belt arranged on the inside of the tread portion, wherein said belt and/or said carcass ply is reinforced by steel cords; and (5) a rubber composition surrounding the steel cords, wherein said rubber composition comprises: (a) 100 parts by weight of at least one rubber selected from the group consisting of natural rubber and dienic synthetic rubber; (b) 0.1-5.0 parts by weight of alkadiene sulfone; and (c) 0.05-1.0 parts by metal weight of at least one metal salt of an organic acid selected from the group consisting of cobalt salt of an organic acid and nickel salt of an organic acid.