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WO2018124471A1 - Câble pour pneu en polyester et pneu radial l'utilisant - Google Patents

Câble pour pneu en polyester et pneu radial l'utilisant Download PDF

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Publication number
WO2018124471A1
WO2018124471A1 PCT/KR2017/013132 KR2017013132W WO2018124471A1 WO 2018124471 A1 WO2018124471 A1 WO 2018124471A1 KR 2017013132 W KR2017013132 W KR 2017013132W WO 2018124471 A1 WO2018124471 A1 WO 2018124471A1
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Prior art keywords
ply
cord
stress
tire
kgf
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Ceased
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PCT/KR2017/013132
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English (en)
Korean (ko)
Inventor
남윤희
이경하
박진경
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Hyosung Corp
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Hyosung Corp
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters

Definitions

  • the present invention relates to a radial tire with a cap ply made of polyethylene terephthalate dip cord.
  • the installation of a cap ply on a tire for a passenger car is for the safety of the tire.
  • a tire having such a cap ply has become common.
  • the cap ply refers to a part that is continuously wound between the tire tread portion and the belt reinforcing steel cord layer without breaking in the circumferential direction of the tire to maintain the shape stability of the tire.
  • Such cap plies are typically reinforced with materials that have heat shrinkage at high temperatures.
  • Loss of energy occurs. This energy loss leads to the rolling resistance of the vehicle, and in general, when using a material having high energy loss characteristics, the fuel efficiency of the vehicle is increased due to the increase in the rolling resistance of the tire and the temperature of the tire is increased due to the driving. .
  • the role of the cap ply material is to prevent the size of the tire from growing by driving the cap ply when the temperature of the tire increases due to the driving of the vehicle. In this case, since the tire does not increase in size, an increase in tire rotational inertia is prevented, resulting in reduction of energy consumption and suppression of heat generation of the tire, thereby increasing fatigue life and increasing durability.
  • nylon 66 the material used for cap ply material due to the high shrinkage of nylon 66.
  • the part where the cab ply is reinforced is known to be the hottest part of the tire. Therefore, besides the heat shrinkage force, a material having heat resistance should be used, and a material having a low deterioration in adhesion force due to heat should be used.
  • Nylon 66 is the material used for tire cords with these properties.
  • Aramid has different characteristics from nylon 66.
  • Aramid fibers are aromatic polyamide fibers which are polyamide fibers having a benzene ring in a repeating unit. When applied to a tire cap ply as a material that shows stable physical properties even at high temperatures, it is difficult to expect the development of shrinkage at high temperatures, but the deformation is suppressed because the property deterioration is very small even at high temperatures, which is similar to the result of applying the nylon cap ply. Therefore, the use of such aramid fibers is increasing, but aramid fibers have a problem of low fatigue resistance and at the same time the price is very expensive, the cost problem occurs.
  • the present invention is to solve the problems with the material of the cap ply of the conventional radial tire has the following object.
  • An object of the present invention for solving the above problems is to provide a radial tire having a cap fly layer applied with a deep cord made of polyethylene terephthalate high strength yarn.
  • the radial tire according to the present invention has excellent physical properties with improved adhesion and fatigue resistance to rubber, which is a disadvantage of polyethylene terephthalate fiber, and exhibits improved strength and high temperature properties.
  • a pair of parallel bead cores At least one radial carcass fly wound around the bead core; A capply layer laminated on a carcass ply periphery; And a circumferential cap ply reinforcement layer formed on an outer circumference of the cap ply layer.
  • the cap ply includes a dip cord manufactured by using 500 to 2000 denier yarns made of polyethylene terephthalate high strength yarn in the form of 1 ply or 2 ply,
  • 1000d / 2 deep cords have a force-strain curve that stretches less than 5.0% at an initial stress of 5kgf, 9.0% or less at 10kgf stress, and elongates at least 1.0% from 14kgf to cutting.
  • the 1000d / 2 dip cord has the physical properties of 2.0 to 4.0%, elongation at break 8.0 to 14.0% at a strong 14.0 to 18.0kgf, medium elongation 4.5kgf.
  • the dip cord has a twist number of 200 to 400 TPM.
  • the cap ply is one or two layers.
  • a run flat tire comprising the cap ply is provided.
  • a pair of parallel bead cores At least one radial carcass fly wound around the bead core; A capply layer laminated on a carcass ply periphery; And a circumferential cap ply reinforcement layer formed on an outer circumference of the cap ply layer.
  • the cap ply includes a dip cord manufactured by using 500 to 2000 denier yarns made of polyethylene terephthalate high strength yarn in the form of 1 ply or 2 ply,
  • 1500d / 2 dip cords have a force-strain curve that elongates less than 4.0% at an initial stress of 5kgf, 7.3% or less at 10kgf stress, and elongates at least 1.5% from 16kgf until cut.
  • the 1500d / 2 dip cord has a physical property of 3.0 to 5.0%, elongation at break 9.0 to 15.0% at a strength of 20.0 to 25.0kgf, intermediate 6.8kgf.
  • the dip cord has a twist number of 200 to 400 TPM.
  • the cap ply is one or two layers.
  • a run flat tire comprising the cap ply is provided.
  • the deep cord made of polyethylene terephthalate high strength yarn of the present invention can overcome the disadvantage of low adhesive strength with conventional rubber, and the treatment cord formed from this yarn has excellent adhesive strength and strength to provide rubber products such as tires and belts. It can be usefully used as a reinforcing material or for other industrial uses.
  • the present invention by applying a dip cord made of the polyethylene terephthalate high strength yarn of the present invention to the cap fly layer of a radial tire for a passenger car, it is possible to improve adhesion with rubber and satisfactory tire durability, ride comfort and steering stability, etc. You can get the result.
  • Figure 1 illustrates the spinning and stretching process of polyethylene terephthalate yarn according to the present invention.
  • Figure 2 is a force-strain curve for the present invention and a conventional 1000d / 2 polyethylene terephthalate dip cord.
  • Figure 4 shows the structure of a tire for a passenger car manufactured using the dip cord according to the present invention in the cap fly layer.
  • Cap fly cord for radial tire according to the present invention is manufactured through the following process.
  • Polyethylene terephthalate multifilament is prepared as a preliminary step for producing the cord for the cap fly layer.
  • the polyethylene terephthalate chip having an intrinsic viscosity of 0.9 to 1.15 is melted and extruded while passing through a nozzle to produce a discharge yarn.
  • the polyethylene terephthalate polymer may contain at least 85 mole% of ethylene terephthalate units, but may optionally include only ethylene terephthalate units.
  • the polyethylene terephthalate may comprise a small amount of units derived from ethylene glycol and terephthalenedicarboxylic acid or derivatives thereof and one or more ester-forming components as copolymer units.
  • ester forming components copolymerizable with polyethylene terephthalate units include glycols such as 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, and the like, terephthalic acid, isophthalic acid, hexahydroterephthalic acid, stilbenica Carboxylic acid, bibenzoic acid, adipic acid, sebacic acid, azel
  • Dicarboxylic acids such as lactic acid.
  • TPA Terephthalic acid
  • ethylene glycol raw materials are melt mixed in the ratio of 2.0 to 2.3 in the prepared polyethylene terephthalate chip, and the melt mixture is transesterified and axially polymerized to form a raw chip.
  • the low chip is then subjected to solid phase polymerization to have an intrinsic viscosity of 0.9 to 1.15 at a temperature of 240 to 260 ° C. and a vacuum.
  • an antimony compound preferably antimony trioxide
  • an antimony compound may be added as the polymerization catalyst in the course of the polycondensation so that the amount of antimony metal remaining in the final polymer is 180 to 300 ppm.
  • the residual amount is less than 180ppm, the polymerization reaction rate is lowered, and the polymerization efficiency is lowered.
  • the residual amount is more than 300ppm, more than necessary antimony metal acts as a foreign matter, which may lower the radial stretching workability.
  • the polyethylene terephthalate chip as described above is melted and extruded while passing through a nozzle to produce a discharge yarn.
  • the diameter of the nozzle is preferably 0.8 ⁇ 1.4mm.
  • the discharge yarn is passed through a cooling zone to quench and solidify.
  • a heating device of a certain length is installed in a distance from the nozzle directly to the start point of the cooling zone, that is, the length L of the hood.
  • This zone is called delayed cooling zone or heating zone, which has a length of 50 to 300 mm and a temperature of 250 to 400 ° C. (air contact surface temperature).
  • an open quenching method In the cooling zone, an open quenching method, a circular closed quenching method, a radial outflow quenching method, and a radial inflow quenching method according to a method of blowing cooling air. ) May be applied, but is not limited thereto.
  • the temperature of the cooling air injected for rapid cooling in the cooling zone is adjusted to 20 to 50 °C. Rapid cooling using such a sharp temperature difference between the hood and the cooling zone is intended to increase the freezing point and spinning tension of the spun polymer to increase the orientation of the undrawn yarn and the formation of the linking chain between the crystal and the crystal.
  • the discharged solidified yarn passing through the cooling zone can be oiled from 0.5 to 1.2% by weight with respect to the discharged yarn by the first spinning oil supply device applying an emulsion having excellent stretchability and thermal efficiency while reducing the friction coefficient between single yarns.
  • an emulsion type emulsion is applied to the first spinning emulsion applying device.
  • the oiled release yarns are spun to form undrawn yarns.
  • the degree of orientation of the non-drawn yarn is preferably from 0.06 to 0.60. If the degree of orientation of the undrawn yarn is less than 0.06, the degree of crystallinity and crystallinity cannot be increased in the microstructure of the yarn. Can not do it.
  • the unstretched yarn is stretched in multiple stages by passing through a stretched roller to produce a yarn.
  • the stretching is performed by using the equipment to which the stretching roller is applied in five stages.
  • PET chips are melt melt spun at a spinning temperature of 290 to 310 ° C. through an extruder 1, a gear pump 2, a nozzle 3, and a heating device 4 to be pyrolyzed and hydrolyzed. The fall of the viscosity of a polymer by this is prevented.
  • the melt-discharged yarns are quenched and solidified through the cooling zone 5 and, if necessary, a short heating device for the distance to the start point of the cooling zone 5 immediately below the nozzle 2, ie, the length L of the hood. (Not shown) may be installed.
  • the length L section of the hood becomes a delay cooling zone or heating zone and has a length of 50 to 300 mm and a temperature of 250 to 400 ° C. (air contact surface temperature).
  • open quenching, circular closed quenching and radial outflow quenching may be applied, but the present invention is not limited thereto. no.
  • the present invention is characterized in that it is further controlled by the A / C (air conditioner) from the outside in order to reduce the cooling temperature from the existing 20 °C to 10 to 15 °C to improve the cooling efficiency.
  • the cooling temperature is preferably 14 ° C.
  • Emulsion supply device 12 is characterized in that it is installed in one stage before the stretching roller 1 (6) and the stretching roller 4 (9).
  • a yarn is formed by stretching the yarn passing through the first drawing roller while passing through a series of drawing rollers by a spin draw method.
  • the speed is set in the range of 2,000 to 3,500 m / min.
  • the unstretched yarn may be multistage stretched, and each stretch roller temperature may be lower than or equal to the glass transition temperature of the unstretched yarn, but lower than 95 ° C, and the final stretch roller temperature is preferably 200 to 250 ° C. .
  • the last stretching roller temperature is less than 200 °C, the degree of crystallinity and crystal size does not increase in the stretching process does not express the strength and thermal stability of the yarn to reduce the form stability at high temperature, the last stretching roller temperature exceeds 250 °C If there is a problem in that the microstructure of the yarn is uneven such that crystals are decomposed so close to the melting point that the strength of the yarn may be reduced.
  • the stretching roller 1 has a feature of setting the speed in a range of 2,000 to 3,500 m / min.
  • the stretching rollers 5 are wound at 5000 to 6000 m / min, and the temperatures of the stretching rollers 4 and 5 become 240 to 250 ° C.
  • the total draw ratio of the yarn formed by winding as mentioned above is 2.0 or less. If the draw ratio exceeds 2.0, the crystallization of the oriented non-fixed portion increases, drawing workability decreases, trimming occurs, and the molecular chain of the amorphous part is broken in the microstructure of the yarn, which lowers the uniformity of the molecular chain. This may decrease and is undesirable.
  • temperature in the range of 240-250 degreeC in 4 steps and 5 steps of extending
  • a dip cord should be manufactured using the polyethylene terephthalate high strength multifilament yarn.
  • a step of giving a cord to the cord is required.
  • the cord in manufacturing a deep cord using the polyethylene terephthalate high-strength yarn, as a preliminary step of manufacturing the deep cord, the cord is subjected to a step of preparing a raw cord (a twisting step).
  • the twisted yarn is manufactured by adding a twisted twist to a polyethylene terephthalate yarn and then adding a twisted twist to the twisted yarn.
  • the twisted lead and the lower lead are subjected to the same softening (level of twist) or other softening as necessary. .
  • the soft water of the polyethylene terephthalate deep cord is 200/200 TPM (Twist Per Meter) to 400/400 TPM with the same upper and lower edges.
  • TPM Transmission Per Meter
  • the manufactured dip cords can easily maintain a straight line without exhibiting rotation or twisting, thereby maximizing physical properties.
  • the number of upper and lower stations is less than 200/200 TPM, the extension of the raw cord decreases and the fatigue resistance is easily lowered, and when it exceeds 400/400 TPM, the strong decrease is large.
  • the produced 'Raw Cord' is woven into a fabric using a weaving machine and the obtained fabric is immersed in a dipping liquid. Then, the fabric is cured to produce a 'Dip Cord' for a tire cord having a resin layer attached to the raw cord surface.
  • Figure 2 is a force-strain curve for the present invention and a conventional 1000d / 2 polyethylene terephthalate dip cord.
  • the force-strain curve of the polyethylene terephthalate dip cord can be adjusted to minimize the initial deformation to the impact initially generated by the external force of the polyethylene terephthalate dip cord.
  • Polyethylene terephthalate dip cord of the present invention is less than 5.0% elongation at the initial stress of 5kgf, 9.0% or less at 10kgf stress, and may have a force-strain curve that extends by at least 1.0% until cutting from 14kgf.
  • the process used to form the force-strain curve is made of a polyethylene cord by the polyethylene terephthalate multifilament through a twisting process, and then heat-treated before being immersed in the dipping liquid to work at a high draw ratio It includes a step.
  • This step is closely related to the force-strain curve shape of the polyethylene terephthalate dip cord of the present invention, preferably 4 kgf to 10 kgf.
  • the force-strain curve of the polyethylene terephthalate dip cord can be adjusted to minimize the initial deformation to the impact initially generated by the external force of the polyethylene terephthalate dip cord.
  • Polyethylene terephthalate dip cord of the present invention is less than 4.0% elongation at the initial stress of 5kgf, 7.3% or less at 10kgf stress, and may have a force-strain curve that extends by at least 1.5% until cut from 16kgf.
  • the process used to form the force-strain curve is made of a polyethylene cord by the polyethylene terephthalate multifilament through a twisting process, and then heat-treated before being immersed in the dipping liquid to work at a high draw ratio It includes a step.
  • This step is closely related to the force-strain curve shape of the polyethylene terephthalate dip cord of the present invention, preferably 4 kgf to 10 kgf.
  • the polyethylene terephthalate dip cord manufactured through such a process has good workability and strong utilization.
  • the raw cord woven into the fabric and heat treated is immersed in the dipping liquid, and then the fabric is cured to produce a 'Dip Cord' for a tire cord having a resin layer attached to the surface of the raw cord.
  • dipping refers to impregnating a surface of a fiber with a resin layer called Resorcinol Formaline Latex (RFL).
  • RRL Resorcinol Formaline Latex
  • the adhesive solution for the adhesion of the cord and rubber can be prepared using the following method.
  • the adhesive is applied after the cord is dried.
  • a stretch of 0 to 4% is required, and preferably 1 to 2% of stretching can be made. If the elongation ratio is too high, the adhesion amount of the adhesive liquid can be controlled but the elongation is reduced and consequently the fatigue resistance is reduced.
  • the adhesive amount is preferably 1.5 to 3.5% by weight of the fiber based on the solid content.
  • the dip cord is dried at 120 to 170 °C.
  • the drying time can be from 180 seconds to 220 seconds, and the dip cord can be stretched by 1 to 2% in the drying process.
  • the elongation ratio is low, the core and the elongation of the cord may increase, indicating physical properties that are difficult to apply to the tire cord.
  • the neutrophil level is appropriate but the body length is too small, which may reduce fatigue resistance.
  • heat treatment is carried out in a temperature range of 130 to 240 °C. Elongation rate during heat treatment is maintained between -2 to 2.0%, the heat treatment time is appropriate 50 seconds to 90 seconds.
  • the reaction time of the adhesive liquid is insufficient, resulting in low adhesive strength.
  • heat treatment is performed for 90 seconds or more, the hardness of the adhesive liquid may be increased, thereby reducing the fatigue resistance of the cord. .
  • Polyethylene terephthalate dip cord prepared according to the above-described method has a fineness of 1000 to 6000, and an adhesion of at least 6 kg, preferably 10 to 30 kg; And the cutting load can be advantageously used as a tire cord for passenger cars in the range of 10.0 to 35.0 kg.
  • Polyethyleneterephthalate dip cords prepared according to the methods described above can be used for the preparation of the capply layer.
  • high performance radial tires made in accordance with the present invention comprise such capply layers.
  • Figure 4 shows a partial cross-sectional view of the structure of a tire for a passenger car manufactured using the polyethylene terephthalate dip cord according to the present invention as a cap ply.
  • the bead regions 35 of the tire 31 become annular bead cores 36 each of which are inextensible.
  • the bead core 36 is preferably made from a single filament steel wire wound continuously.
  • the high strength steel wire having a diameter of 0.95 mm to 1.00 mm becomes a 4x4 structure or a 4x5 structure.
  • the bead region 35 may have a bead filler 37, the bead filler 37 should have a hardness of a predetermined level or more, preferably Shore A hardness ( Shore A hardness)
  • the tire 31 may be reinforced with the crown portion by the belt structure 38 and the cap fly 39.
  • the belt structure 38 comprises a cutting belt ply 40 consisting of two belt cords 41 and 42 and the belt cord 41 of the belt ply 40 is about 20 with respect to the circumferential center surface of the tire. Can be oriented at an angle of degrees.
  • One belt cord 41 of the belt ply 40 may be arranged in a direction opposite to the circumferential center surface, opposite to the direction of the belt cord 42 of the other belt ply 40.
  • the belt structure 38 may comprise any number of plies, and may preferably be arranged in the range of 16 to 24 degrees.
  • the belt structure 38 serves to provide lateral stiffness to minimize the rise of the tread 33 from the road surface during operation of the tire 31.
  • the belt cords 41 and 42 of the belt structure 38 may be made of steel cords, and have a 2 + 2 structure, but may be made of any structure.
  • the cap ply 39 and the edge ply 44 are reinforced on the upper portion of the belt structure 38.
  • the cap ply cord 45 of the cap ply 39 is reinforced in parallel to the circumferential direction of the tire to prevent the tire from rotating at high speed.
  • the cap fly cord 45 of the cap ply 39 which acts to suppress the size change in the circumferential direction and has a large heat shrinkage stress at high temperature is used.
  • the capply cord 45 of the capply 39 may be manufactured using a deep cord made of a high strength yarn manufactured according to the method of the present invention.
  • One layer of cap ply 39 and one layer of edge ply 44 may be used, preferably one or two layers of cap plies and one or two layers of edge plies.
  • Reference numerals 32 and 34 not described in FIG. 4 denote the carcass layer 32 and the fly turn-up 34.
  • Reference numeral 33 denotes a carcass layer reinforcing cord 33.
  • the sample length was measured at 250 mm and a tensile speed of 300 m / min. Elongation at specific load was measured at a load of 4.5 kg.
  • the sample length was measured at 250 mm and a tensile speed of 300 m / min. Elongation at specific load was measured at a load of 6.8 kg.
  • Elongation under a constant load is referred to as the median elongation (E) in the present invention
  • 'S' means the dry heat shrinkage of the above (b), the sum of the median elongation (E) and dry heat shrinkage (S) to 'ES' Indicated.
  • the fatigue strength was measured by using the Belt Fatigue Tester which is commonly used for the fatigue test of tire cords. Fatigue test conditions were RT, load (80kg), 37,500 times the rotation conditions, the residual strength was measured by separating the rubber and cord after the fatigue test. The residual strength was measured according to the methods (a-1 and a-2) above using a conventional tensile strength tester.
  • Polyethylene terephthalate fibers were obtained with raw cords according to the method described above in order to prepare the fibers for tire reinforcement.
  • dipping is achieved by impregnating the surface of the fiber with a resin layer called RFL (Resorcinol Formaline-Latex), which is a disadvantage of the tire cord fibers inferior to the original rubber To improve.
  • RFL Resorcinol Formaline-Latex
  • Normal rayon fibers or nylon fibers are subjected to one bath dipping, and when polyethylene terephthalate or polyethylene naphthalate fibers are used, since the reactor on the surface of the fiber is smaller than rayon fibers or nylon fibers, polyethylene terephthalate or polyethylene fibers The surface of the phthalate is activated first and then bonded (2 bath dipping).
  • the lower lead of 250TPM was added to the polyethylene terephthalate yarn (1000D), and then the upper lead of 250TPM was added to form a raw cord.
  • the obtained raw cord was dried at 160 ° C. for 130 seconds by a two bath dipping method, and then passed through an adhesive liquid prepared in the following manner while giving a tension of 5 kgf to give an adhesive liquid. During drying, 2% stretch was applied to prevent non-uniformity of raw cords due to heat shrinkage.
  • the raw cord and the dip cord were prepared in the same manner as in Example 1, except that the raw cord was subjected to a dip of 4 kgf. Table 1 shows the physical properties of the dip cord thus prepared.
  • the raw cord and the dip cord were prepared in the same manner as in Example 1 except that the raw cord was subjected to a dip of 3 kgf. Table 1 shows the physical properties of the dip cord thus prepared.
  • the raw cord and the dip cord were prepared in the same manner as in Example 1, except that the raw cord was subjected to a dip of 2 kgf. Table 1 shows the physical properties of the dip cord thus prepared.
  • the raw cord and the dip cord were prepared in the same manner as in Example 1, except that the raw cord was subjected to a dip of 0 kgf. Table 1 shows the physical properties of the dip cord thus prepared.
  • the raw cord and the dip cord were prepared in the same manner as in Example 1 except that the raw cord was subjected to a dip of 10 kgf. Table 1 shows the physical properties of the dip cord thus prepared.
  • Example 1 16.9 2.6 2.9 7.2 1.1 3.0 5.6 90
  • Example 2 16.8 2.5 3.0 7.4 1.2 2.9 5.4 92
  • Example 3 16.8 2.7 3.0 7.3 1.2 2.9 5.6 91
  • Example 4 16.1 2.8 3.2 7.5 0.9 3.2 6.0 90 Comparative Example 1 15.5 3.5 3.7 8.6 - 3.7 7.2 88 Comparative Example 2 15.4 3.6 3.8 8.7 - 3.5 7.1 85
  • the radial tire manufactured by using the deep cord manufactured according to Example 1 of the present invention as a cap ply has a carcass layer having a radially outer fly turn up, and the carcass layer was installed to include one layer. At this time, the carcass cord was oriented at a 90 degree angle with respect to the circumferential intermediate surface of the tire.
  • the fly turn-up 34 was to have a height of 40 to 80% with respect to the tire maximum cross-sectional height.
  • the bead part 35 has a bead core 36 and a shore A hardness 40 having a high strength steel wire having a diameter of 0.95 to 1.00 mm.
  • the belt 38 is reinforced by a belt reinforcement layer having a capply 39 on one layer and an edge ply 44 on a first layer so that the capply cord in the capply 39 is parallel to the circumferential direction of the tire. Placed.
  • a tire was manufactured in the same manner as in Example 5, except that a cord material for manufacturing a tire was used as the dip cord prepared in Example 2.
  • a tire was manufactured in the same manner as in Example 5, except that a cord material for manufacturing a tire was used as a dip cord prepared in Comparative Example 1.
  • Example 6 Comparative Example 3 Carcass Material Polyethylene terephthalate Polyethylene terephthalate Polyethylene terephthalate Specification (d / ply twisted yarn) 1500d / 2 1500d / 2 1500d / 2 Strong (kg) 24 24 24 Modulus of elasticity (g / d) 72 72 72 Cap fly Material Deep Code of Example 1 Deep Code of Example 2 Deep Code of Comparative Example 1 Specification (d / ply twisted yarn) 1000d / 2 1000d / 2 1000d / 2 Strong (kg) 16.9 16.8 15.5 Modulus of elasticity (g / d) 65 65 65 65 tire Flat ratio 0.60 0.60 0.60 Carcass floors One One One Cap fly floor One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One
  • the 205/65 R15 V tires manufactured according to Examples 5, 6 and Comparative Example 3 were mounted on a 2000cc class passenger car, and the noise generated in the vehicle was measured while driving at a speed of 60 km / h to determine the value of the audible frequency range.
  • the noise was expressed in dB, and the steering stability and the riding comfort were evaluated by the experienced driver by driving the test course in units of 5 out of 100 points, and the results are shown in Table 3 below.
  • Durability is measured at 38 ° C according to the P-metric tire endurance test method of FMVSS 109.
  • Example 6 Comparative Example 3 Tire weight (kg) 9.70 9.90 9.60 Ride 100 100 98 ⁇ stability 100 100 98 durability OK OK OK Uniformity 100 100 97 Noise (dB) 61.4 61.8 62.2
  • the tires using the deep cords according to the present invention are characterized in terms of noise reduction and steering stability in comparison with Comparative Example 3 using a conventional polyethylene terephthalate company in cap ply.
  • the effect was excellent, it can be seen that the uniformity of the tire is also improved.
  • Polyethylene terephthalate fibers were obtained with raw cords according to the method described above in order to prepare the fibers for tire reinforcement.
  • dipping is achieved by impregnating the surface of the fiber with a resin layer called RFL (Resorcinol Formaline-Latex), which is a disadvantage of the tire cord fibers inferior to the original rubber To improve.
  • RFL Resorcinol Formaline-Latex
  • Normal rayon fibers or nylon fibers are subjected to one bath dipping, and when polyethylene terephthalate or polyethylene naphthalate fibers are used, since the reactor on the surface of the fiber is smaller than rayon fibers or nylon fibers, polyethylene terephthalate or polyethylene fibers The surface of the phthalate is activated first and then bonded (2 bath dipping).
  • the lower cord of 200TPM was added to the polyethylene terephthalate company (1500D), and the upper cord of 200TPM was added, and the raw cord was combined.
  • the obtained raw cord was dried at 160 ° C. for 130 seconds by a two bath dipping method, and then passed through an adhesive liquid prepared in the following manner while giving a tension of 5 kgf to give an adhesive liquid. During drying, 2% stretch was applied to prevent non-uniformity of raw cords due to heat shrinkage.
  • the raw cord and the dip cord were prepared in the same manner as in Example 7, except that the raw cord was subjected to a dip of 4 kgf.
  • the physical properties of the thus prepared dip cord are evaluated and shown in Table 4.
  • the raw cord and the deep cord were prepared in the same manner as in Example 7, except that the raw cord was subjected to a dip of 3 kgf.
  • the physical properties of the thus prepared dip cord are evaluated and shown in Table 4.
  • the raw cord and the dip cord were prepared in the same manner as in Example 7, except that the raw cord was subjected to a dip of 2 kgf.
  • the physical properties of the thus prepared dip cord are evaluated and shown in Table 4.
  • the raw cord and the dip cord were prepared in the same manner as in Example 7, except that the raw cord was dipd by applying a tension of 0 kgf.
  • the physical properties of the thus prepared dip cord are evaluated and shown in Table 4.
  • the raw cord and the dip cord were prepared in the same manner as in Example 7, except that the raw cord was subjected to a dip of 10 kgf.
  • the physical properties of the thus prepared dip cord are evaluated and shown in Table 4.
  • Example 7 24.9 3.8 3.4 8.0 1.4 3.1 6.9 90
  • Example 8 24.8 3.8 3.5 8.1 1.7 2.9 6.7 92
  • Example 9 24.8 3.9 3.5 8.1 1.6 3.1 7.0 91
  • Example 10 24.7 3.9 3.6 8.2 1.5 3.2 7.1 90
  • Comparative Example 4 22.5 4.3 4.0 10.3 - 3.6 7.9 85 Comparative Example 5 21.0 4.5 4.1 10.4 - 3.8 8.3 88
  • the radial tire manufactured by using the dip cord manufactured according to Example 7 of the present invention as a cap ply has a carcass layer having a radially outer fly turn up, and the carcass layer was installed to include one layer. At this time, the carcass cord was oriented at a 90 degree angle with respect to the circumferential intermediate surface of the tire.
  • the fly turn-up 34 was to have a height of 40 to 80% with respect to the tire maximum cross-sectional height.
  • the bead part 35 was formed to have a bead core 36 having a high strength steel wire having a diameter of 0.95 to 1.00 mm and a bead filler 37 having a hardness of 40 or more shore A hardness.
  • the belt 38 is reinforced by a belt reinforcement layer having a capply 39 on one layer and an edge ply 44 on a first layer so that the capply cord in the capply 39 is parallel to the circumferential direction of the tire. Placed.
  • a tire was manufactured in the same manner as in Example 11, except that a cord material for manufacturing a tire was used as the dip cord prepared in Example 8.
  • a tire was manufactured in the same manner as in Example 11, except that a cord material for manufacturing a tire was used as a dip cord prepared in Comparative Example 4.
  • Example 12 Comparative Example 6 Carcass Material Polyethylene terephthalate Polyethylene terephthalate Polyethylene terephthalate Specification (d / ply twisted yarn) 1500d / 2 1500d / 2 1500d / 2 Strong (kg) 24 24 24 Modulus of elasticity (g / d) 72 72 72 Cap fly Material Deep Code of Example 7 Deep Code of Example 8 Deep Code of Comparative Example 4 Specification (d / ply twisted yarn) 1500d / 2 1500d / 2 1500d / 2 Strong (kg) 24.9 24.8 22.5 Modulus of elasticity (g / d) 70 70 70 tire Flat ratio 0.60 0.60 0.60 Carcass floors One One One Cap fly floor One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One One
  • the 205/65 R15 V tires manufactured according to Examples 11, 12 and Comparative Example 6 were mounted on a 2000cc class passenger car, and the noise generated in the vehicle was measured while driving at a speed of 60 km / h.
  • the noise generated in the vehicle was measured while driving at a speed of 60 km / h.
  • the steering stability and ride comfort were evaluated by a trained driver on a test course in units of 5 out of 100 points, and the results are shown in Table 6 below.
  • Durability is based on FMVSS 109's P-metric tire endurance test method, measured at 38 ° C (85 ° C) and 85, 90, and 100% of the tire's marked load, at a driving speed of 80 km / h. After 34 hours of driving, if no trace of bead separation, cord cutting, belt separation, or the like was found in any part of the tread, sidewall, carcass cord, inner liner, or bead, the result was determined as OK.
  • Example 12 Comparative Example 6 Tire weight (kg) 9.70 9.90 9.60 Ride 100 100 98 ⁇ stability 100 100 98 durability OK OK OK Uniformity 100 100 97 Noise (dB) 61.4 61.8 62.2
  • the tires using the dip cords according to the present invention are in terms of noise reduction and control stability compared to Comparative Example 6 using a conventional polyethylene terephthalate company in the cap ply.
  • the effect was excellent, it can be seen that the uniformity of the tire is also improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Tires In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

La présente invention concerne un pneu radial comprenant une nappe de sommet formée à partir de câbles imprégnés de polyéthylène téréphtalate. Le pneu radial comprend : une paire de tringles de talon parallèles ; au moins une nappe de carcasse radiale enroulée autour des tringles de talon ; une couche de nappe de sommet stratifiée sur la circonférence extérieure de la nappe de carcasse ; et une couche de renforcement de nappe de sommet de direction circonférentielle formée sur la circonférence extérieure de la couche de nappe de sommet. La nappe de sommet comprend des câbles imprégnés formés à partir d'un seul pli ou de deux plis d'un fil de 500 à 2 000 deniers formé à partir d'un fil de polyéthylène téréphtalate à haute résistance. Parmi les câbles imprégnés, un câble imprégné de 1000 d/2 présente une courbe contrainte-déformation selon laquelle le câble imprégné s'allonge de moins de 5,0 % lorsqu'il est soumis à une contrainte initiale de 5 kgf, s'allonge au maximum de 9,0 % lorsqu'il est soumis à une contrainte de 10 kgf, et s'allonge d'au moins 1,0 % lorsqu'il est soumis à une plage de contraintes d'une contrainte de 14 kgf à la contrainte de rupture du câble imprégné, ou un câble imprégné de 1500 d/2 présente une courbe contrainte-déformation selon laquelle le câble imprégné s'allonge de moins de 4,0 % lorsqu'il est soumis à une contrainte initiale de 5 kgf, s'allonge au maximum de 7,3 % lorsqu'il est soumis à une contrainte de 10 kgf, et s'allonge d'au moins 1,5 % lorsqu'il est soumis à une plage de contraintes d'une contrainte de 16 kgf à la contrainte de rupture du câble imprégné.
PCT/KR2017/013132 2016-12-30 2017-11-17 Câble pour pneu en polyester et pneu radial l'utilisant Ceased WO2018124471A1 (fr)

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KR1020160183623 2016-12-30
KR10-2016-0183383 2016-12-30
KR10-2016-0183623 2016-12-30
KR20160183383 2016-12-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05163627A (ja) * 1991-12-19 1993-06-29 Toray Ind Inc ポリエステルタイヤコードの製造方法
KR940703942A (ko) * 1991-01-21 1994-12-12 로날드 에이. 블리이커 타이어 코드 및 복합물용 고(高) 모듈러스 폴리에스테르사 및 그 제조방법
KR20070102129A (ko) * 2006-04-14 2007-10-18 주식회사 효성 산업용 고강력 폴리에틸렌테레프탈레이트 필라멘트
KR20120069340A (ko) * 2010-12-20 2012-06-28 주식회사 효성 폴리에스터 멀티필라멘트를 이용한 래디얼 공기입 타이어
KR101602387B1 (ko) * 2014-12-12 2016-03-10 주식회사 효성 고모듈러스 폴리에틸렌테레프탈레이트 타이어코드의 제조방법 및 이로부터 제조된 고모듈러스 폴리에틸렌테레프탈레이트 타이어코드

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940703942A (ko) * 1991-01-21 1994-12-12 로날드 에이. 블리이커 타이어 코드 및 복합물용 고(高) 모듈러스 폴리에스테르사 및 그 제조방법
JPH05163627A (ja) * 1991-12-19 1993-06-29 Toray Ind Inc ポリエステルタイヤコードの製造方法
KR20070102129A (ko) * 2006-04-14 2007-10-18 주식회사 효성 산업용 고강력 폴리에틸렌테레프탈레이트 필라멘트
KR20120069340A (ko) * 2010-12-20 2012-06-28 주식회사 효성 폴리에스터 멀티필라멘트를 이용한 래디얼 공기입 타이어
KR101602387B1 (ko) * 2014-12-12 2016-03-10 주식회사 효성 고모듈러스 폴리에틸렌테레프탈레이트 타이어코드의 제조방법 및 이로부터 제조된 고모듈러스 폴리에틸렌테레프탈레이트 타이어코드

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