Method for the treatment of single-filament polyethylene terephthalate cords for the reinforcing layers of a pneumatic tyre comprising (a) an adhesive solution coating step, wherein the single filament cord is immersed in an adhesive solution; (b) a drying step, wherein the cord covered in adhesive resin is held within a drying oven at a temperature of between 120 and 180° C.; and (c) a thermobonding step wherein the cord, proceeding from the drying step, is arranged within an oven at a temperature of between 230 and 260° C. for a period of between 30 and 90 seconds. During the thermobonding step, the single filament cord is subjected to a tension of between 8 and 12 mN/dtex.

A tire (1) for a heavy construction plant vehicle with satisfactory compromise between the breaking strength of its circumferential hoop reinforcement (7), having an axial width LF and having a circumferential hooping layer (71, 72) with elastic metallic reinforcers having a structural elongation AS and a force at break FR, and forming an angle at most equal to 5° with the circumferential direction (XX), and the endurance of its working reinforcement (6), formed by two working layers (61, 62) with inextensible metallic reinforcers, the mean angle AM of which with the circumferential direction (XX′) is at least equal to 15° and at most equal to 45°. The axial width LF, the structural elongation As, the force at break Fr and the mean angle AM satisfy the relationship:

Zn/Z0*(T0+(a1+a2*As)/AM+b*LF*(AM−A0)/A0+c*AM)<Fr/CS, where Zn is the nominal load, Z0=100 t, T0=7000 N, a1=−230,000 N*°, a2=−160,000 N*°/%, b=−34,000 N/m, A0=29°, c=550 N/°, CS>=1.

A two-layer multi-strand cord (60) has a modulus EC such that 50 GPa≤EC≤160 GPa. The cord comprises: (a) an internal layer (CI) of the cord made up of J>1 internal strands (TI) wound in a helix having a modulus EI, each internal strand (TI) comprising: an internal layer (C1) made up of Q≥1 internal threads (F1), and an external layer (C2) made up of N>1 external threads (F2) wound around the internal layer (C1), and (b) an external layer (CE) of the cord made up of L>1 external strands (TE) wound around the internal layer (CI) of the cord, each external strand (TE) comprising: an internal layer (C1′) made up of Q′≥1 internal threads (F1′), and an external layer (C2′) made up of N′>1 external threads (F2′) wound around the internal layer (C1′).

A tire includes a carcass, a tread disposed radially outward of the carcass, a sidewall including a shoulder extends toward the tread, and a reinforcing structure positioned radially between the carcass and the tread. The reinforcing structure includes a plurality of belts extending axially toward the shoulder and an overlapping spiral wound strip positioned at a radially outermost portion of the reinforcing structure. The overlapping spiral wound strip includes a uniform width having groups of four first cords with a single second cord therebetween. The first cords include a hybrid construction and the second cords include a single material construction.

A pneumatic tire includes a ply having a plurality of cords each having an average cord diameter D, and a sidewall rubber having a loss tangent tan δ The plurality of cords each includes a plurality of filaments twisted together, the plurality of filaments each having an outer diameter d. The plurality of cords each has a ratio D/d of the average cord diameter D to the outer diameter d being equal to or more than 28. The ratio D/d and the loss tangent tan δ of the sidewall rubber satisfy the following formula;

(tan δ)/(D/d)*1000≤5.5.

A radial pneumatic tire for a heavy-duty civil engineering vehicle aims to reduce the risk of tread separation of the pneumatic tire, during driving on sharp rocks, while ensuring good resistance to cracking of the crown reinforcement. The pneumatic tire has a protective reinforcement with two protective layers, the radially innermost protective layer having elastic metal reinforcements with a diameter D1 which are axially distributed according to an axial pitch P1, and the radially outermost protective layer has elastic metal reinforcements with a diameter D2 which are axially distributed according to an axial pitch P2. In the tire the following relations are satisfied:
D1>D2
P1>P2
P1>=1.2*D1 and P2>=1.2*D2
2.5<=(D1*P1)/(D2*P2)<=5.

A pneumatic vehicle tire of radial type of construction for utility vehicles, in particular trucks, buses and truck trailers, having a belt which has three or more belt plies (5, 6, 7, 8, 9) with steel cords (10), wherein each steel cord (10) has at least two strands (11) and wherein each strand (11) has at least two steel filaments (12); the invention is characterized in that steel cords (10) of the construction 2 to 4×N, where N=2 to 5, are at least arranged in one of the belt plies (5, 6, 7, 8, 9), wherein this construction means that this steel cord (10) has 2 to 4 twisted-together strands (11), wherein each strand (10) comprises 2 to 5 steel filaments (12) which are twisted together such that these 2 to 5 steel filaments (12) are arranged without a core filament.

A cable as may be used in a tire, including a pneumatic tire. The cable is constructed in a manner that can provide a desired stiffness to a tire as well as a certain amount of structural elongation. The cable can be provided in a manner that does not necessarily result in an increase in the overall weight of the tire as would occur by e.g., increasing the diameter of a conventional cable construction.

The present invention relates to a vehicle tire comprising a belt bandage, wherein the belt bandage comprises strength members, wherein the strength members comprise hybrid cords arranged parallel to one another within the ply, and wherein the hybrid cords each contain at least one yarn made of polyethylene terephthalate (PET) and at least one yarn made of polyamide.

According to the invention the PET of the yarn of the hybrid cord of the belt bandage is recycled PET (rPET).

A tire includes a tread, a crown reinforcement, a carcass reinforcement with at least one ply wound about a pair of bead cores and through two sidewalls of the tire, and a cut/puncture resistant sidewall layer disposed adjacent a part of the carcass reinforcement within one of the sidewalls, the cut/puncture sidewall layer being formed of a plurality of cords, each cord including one nylon cord having S 4-8 tpi (twists per inch), one aramid cord having Z 4-8 tpi, and the nylon cord and the aramid cord being twisted together with S 3-7 tpi.