WO2010089990A1 - 乗用車用空気入りタイヤおよび乗用車用空気入りタイヤの製造方法 - Google Patents
乗用車用空気入りタイヤおよび乗用車用空気入りタイヤの製造方法 Download PDFInfo
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- WO2010089990A1 WO2010089990A1 PCT/JP2010/000599 JP2010000599W WO2010089990A1 WO 2010089990 A1 WO2010089990 A1 WO 2010089990A1 JP 2010000599 W JP2010000599 W JP 2010000599W WO 2010089990 A1 WO2010089990 A1 WO 2010089990A1
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- Prior art keywords
- steel cord
- cord material
- cover layer
- tire
- belt cover
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/70—Annular breakers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
- B29D30/3028—Applying the layers; Guiding or stretching the layers during application by feeding a continuous band and winding it helically, i.e. the band is fed while being advanced along the drum axis, to form an annular element
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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
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
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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
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
- B60C9/2204—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre obtained by circumferentially narrow strip winding
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
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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
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
- B60C2009/0021—Coating rubbers for steel cords
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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
- B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
- B60C2009/0092—Twist structure
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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
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
- B60C2009/2214—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre characterised by the materials of the zero degree ply cords
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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
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
- B60C2009/2238—Physical properties or dimensions of the ply coating rubber
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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
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
- B60C2009/2252—Physical properties or dimension of the zero degree ply cords
- B60C2009/2285—Twist structures
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/1044—Rope or cable structures twisted characterised by a value or range of the pitch parameter given
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/1064—Rope or cable structures twisted characterised by lay direction of the strand compared to the lay direction of the wires in the strand
- D07B2201/1068—Rope or cable structures twisted characterised by lay direction of the strand compared to the lay direction of the wires in the strand having the same lay direction
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
- D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2022—Strands coreless
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2025—Strands twisted characterised by a value or range of the pitch parameter given
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2038—Strands characterised by the number of wires or filaments
- D07B2201/2039—Strands characterised by the number of wires or filaments three to eight wires or filaments respectively forming a single layer
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2005—Elongation or elasticity
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2005—Elongation or elasticity
- D07B2401/201—Elongation or elasticity regarding structural elongation
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/208—Enabling filler penetration
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tire cords
Definitions
- the present invention relates to a pneumatic tire for passenger cars having a belt cover layer and a method for manufacturing a pneumatic tire for passenger cars.
- a belt cover layer formed by winding a reinforcing cord in the tire circumferential direction may be provided on the outer peripheral side of the belt layer.
- This belt cover layer has the following advantages. That is, the belt cover layer suppresses the rising of the belt layer to the outer peripheral side during high-speed traveling and suppresses edge separation of the belt layer, that is, increases the high-speed durability of the tire. Further, the belt cover layer improves road noise (in-vehicle noise) performance by suppressing tire vibration.
- the object of the present invention is to improve the high-speed durability and road noise performance in a manner different from the pneumatic tires for passenger cars that use the typed steel cord material, as well as the tires that use the typed steel cord material.
- an object of the present invention is to provide a pneumatic tire for passenger cars and a method for manufacturing a pneumatic tire for passenger cars, which can suppress a vulcanization failure caused by a belt cover layer.
- One aspect of the present invention is a pneumatic tire for passenger cars, Belt layer, A belt cover layer formed by winding a steel cord material in the tire circumferential direction on the outer peripheral side of the belt layer,
- the steel cord material is composed of a plurality of steels, and a plurality of strands formed by twisting strands having a wire diameter of less than 0.18 mm are twisted in the same direction as the stranding direction of the strands.
- Each strand has a twist pitch smaller than that of the steel cord material, the strand has a twist pitch of 1.0 mm to 2.1 mm, and the steel cord material has a twist pitch of 2.0 mm to 5.25 mm.
- Another aspect of the present invention is a method of manufacturing a pneumatic tire for passenger cars, A step of producing a green tire by forming a belt cover layer by winding a steel cord material coated with unvulcanized rubber on the outer peripheral side of the belt layer in the tire circumferential direction; and Vulcanizing while extending the circumference of the green tire having the belt cover layer,
- the steel cord material is composed of a plurality of steels, and a plurality of strands formed by twisting strands having a wire diameter of less than 0.18 mm are twisted in the same direction as the stranding direction of the strands.
- the strand pitch of each strand is smaller than the strand pitch of the steel cord material, the strand pitch of the strand is 1.0 mm to 2.0 mm, and the strand pitch of the steel cord material is 2.0 mm to 5.0 mm. And a method of manufacturing a pneumatic tire for a passenger car.
- the belt is improved while greatly improving high-speed durability and road noise performance in the same manner as a tire using a molded steel cord material. Vulcanization failure due to the cover layer can be suppressed.
- the steel cord material can be used for tire specifications with different expansion rates (lift rates), and the steel cord material can be stretched at the time of lift so that the belt cover layer can follow the lift.
- Pneumatic tires for passenger cars have the vulcanization failure caused by the belt cover layer while greatly improving high-speed durability and road noise performance even if the same steel cord material is used for different tire specifications. Can be suppressed.
- FIG. 1 is a view showing an example of a pneumatic tire for passenger cars of the present invention.
- a pneumatic tire for a passenger car (hereinafter referred to as a tire) shown in FIG. 1 includes a tread portion 1, a sidewall portion 2, a bead portion 3, two carcass layers 4, a bead core 5, a bead filler 6, an inner liner layer 7, and a belt. It mainly has a layer 8 and a belt cover layer 9.
- “Passenger car” tires are tires specified in Chapter A of JATMA YEAR BOOK 2009, tires specified in SECTION1 of TRA, or tires specified in GeneralTRnotes “Passenger car tires” of ETRTO. .
- the two carcass layers 4 are configured by arranging reinforcing cords extending in the tire radial direction at predetermined intervals in the tire circumferential direction.
- the reinforcing cord is embedded in the rubber layer and extends between the left and right bead portions 3.
- the two carcass layers 4 are folded from the inner side to the outer side in the tire axial direction so that both end portions sandwich the bead filler 6 around the bead core 5 embedded in the bead portion 3.
- An inner liner layer 7 is provided inside the carcass layer 4.
- Two belt layers 8 are provided on the outer peripheral side of the carcass layer 4 of the tread portion 1.
- the two belt layers 8 are configured by arranging reinforcing cords that are inclined and extend in the tire circumferential direction at predetermined intervals in the tire circumferential direction.
- the reinforcing cord is embedded in the rubber layer.
- the reinforcing cords of the two belt layers 8 cross each other with the inclination directions with respect to the tire circumferential direction set in opposite directions between the layers.
- a belt cover layer 9 is provided on the outer peripheral side of the belt layer 8.
- the belt cover layer 9 includes a single belt full cover layer 9A and a single belt edge cover layer 9B.
- the belt full cover layer 9 ⁇ / b> A covers the entire belt layer 8
- the belt edge cover layer 9 ⁇ / b> B covers the end side of the belt layer 8.
- the belt full cover layer 9A and the belt edge cover layer 9B of the belt cover layer 9 have a configuration in which one steel cord material 11 covered with rubber 10 is spirally wound in the tire circumferential direction. It has become.
- the steel cord material 11 is composed of a plurality of strands each formed by twisting strands each made of a plurality of steels and having a wire diameter of less than 0.18 mm, preferably 0.08 to 0.15 mm. It has a structure in which the strands are twisted in the same direction as the stranding direction (see FIG. 5). Furthermore, the twist pitch of each strand is smaller than the twist pitch of the steel cord material 11.
- the strands have a twist pitch of 1.0 mm to 2.1 mm, and the steel cord material 11 has a twist pitch of 2.0 mm to 5.25 mm. These twist pitch values are the dimensions of the tire that received the lift.
- the upper limit of the twist pitch of the strand and the upper limit of the twist pitch of the steel cord material 11 are 2.1 mm and 5.25 mm, respectively. These values are the twist pitch in the lifted tire after vulcanization.
- the upper limit of the twist pitch when not lifted before vulcanization is 2.0 mm and 5.0 mm, respectively, as will be described later.
- the twist pitch is 2.0 ⁇ (1 + ⁇ / 100) and 5.0 ⁇ (1 + ⁇ / 100), where ⁇ is the expansion rate (lift rate) of the circumference of the green tire during vulcanization.
- the upper limit of the expansion rate (lift rate) is approximately 5%
- the lower limit of the twist pitch of the strand and the lower limit of the twist pitch of the steel cord material 11 are 1.0 mm (after vulcanization) and 2.0 mm (after vulcanization), respectively.
- the lower limit of the twist pitch when not lifted before vulcanization is also 1.0 mm and 2.0 mm, respectively.
- the lower limit value before and after vulcanization does not change because the expansion rate may be extremely low.
- a tread rubber layer 12 is provided on the outer peripheral side of the belt cover layer 9.
- a side rubber layer 13 is provided on the outside of the carcass layer 4 of each sidewall portion 2.
- a rim cushion rubber layer 14 is provided outside the folded portion of the carcass layer 4 of each bead portion 3.
- the strand pitch of each strand is determined to be smaller than the strand pitch of the steel cord material 11, the strand pitch of the strand is set to 1.0 mm to 2.1 mm, and the strand of the steel cord material 11 is twisted.
- the pitch is set to 2.0 mm to 5.25 mm.
- the steel cord material 11 after vulcanization in the belt cover layer 9 is covered with rubber, and the rubber of the steel cord material 11, for example, the gap between strands or the gap between strands is filled with rubber.
- the tensile rigidity of the steel cord material 11 taken out from the belt cover layer 9 after vulcanization is set to H c ′, the rubber covering the belt cover layer 9 after vulcanization is removed, and the rubber filling the gaps in the steel cord material 11 is filled
- the ratio H c ′ / H b ′ is preferably 1.6 to 2.4.
- a method of removing the rubber covering the steel cord material from the belt cover layer 9 after vulcanization is performed, for example, by pulling out the steel cord material from the belt cover layer 9. Further, in addition to removing the rubber covering the steel cord material from the belt cover layer 9 after vulcanization, the drawn steel wire is immersed in an organic solvent or the like in order to remove the rubber filling the gap. As a result, the coated rubber and the rubber filled in the gap can be dissolved. Thereby, the steel cord material which removed the rubber
- the tensile stiffness ratio H c ′ / H b ′ is substantially the same as the ratio H c / H b described later. That is, the vulcanized steel cord material is elastically stretched by the rubber to be coated, but attempts to restore the elongation to zero by removing the rubber to be coated. However, the steel cord material after vulcanization is filled with rubber in the gap between the steel cord materials. For this reason, the state is not necessarily different from the steel cord material before vulcanization. By removing the rubber that fills the gaps in the steel cord material, the same state as the steel cord material before vulcanization (state of zero elongation) is obtained.
- the tensile rigidity of the steel cord material taken out from the belt cover layer 9 after the vulcanization is corresponds to H c to be described later, to remove the rubber coating from the steel cord material of the belt cover layer 9 after vulcanization and void
- the tensile rigidity of the steel cord material from which the rubber filled in is removed corresponds to Hb described later.
- the tensile strength of the steel cord material taken out from the belt cover layer 9 after vulcanization and the steel cord material when the rubber covering the belt cover layer 9 after vulcanization is removed and the rubber filling the gap is removed
- the tensile stiffness of is measured by the same measuring method as the tensile stiffnesses H b and H c described later.
- the belt cover layer 9 reliably follows the lift during vulcanization, and the belt cover layer 11 The tightening effect (restraint effect) can be more effectively exhibited.
- an unvulcanized inner liner layer 7 ′, an unvulcanized carcass layer 4 ′, and an unvulcanized bead filler 6 ′ are formed on the first molding drum 21 in the same manner as in the prior art.
- attaching (attaching) the attached bead core 5, the unvulcanized rim cushion rubber layer 14 ′, and the unvulcanized side rubber layer 13 ′ in sequence the first molded body 31 is molded.
- the unvulcanized belt layer 8 ′ is pasted on the second forming drum 22 in the same manner as in the prior art. Thereafter, one steel cord material 11 covered with unvulcanized rubber on the belt layer 8 ′ is spirally wound at an angle close to 0 degrees (5 degrees or less) in the tire circumferential direction (drum circumferential direction).
- the belt full cover layer 9′A and the belt edge cover layer 9′B are respectively formed.
- the steel cord material 11 used when forming the unvulcanized belt cover layer 9 ′ includes N strands 16 obtained by twisting M strands 15 and strands 15. It has an N ⁇ M double twist structure twisted in the same direction.
- N M double twist structure
- the steel cord material 11 before receiving the lift which is used when the belt full cover layer 9′A and the belt edge cover layer 9′B are formed, will be described in detail.
- the twist pitch of the strand 16 configured by twisting the strands 15 is smaller than the twist pitch of the steel cord material 11 configured by twisting the strand 16.
- the strand 16 has a twist pitch of 1.0 mm to 2.0 mm
- the steel cord material 11 has a twist pitch of 2.0 mm to 5.0 mm.
- the steel cord material 11 configured as described above has a characteristic having an inflection point at which the slope of the curve C 1 changes greatly in the load-elongation curve.
- the steel cord material 11 is stretched in the R region in FIG. 6, which is lower than the elongation at the inflection point.
- the second molded body 32 is formed by attaching an unvulcanized tread rubber layer 12 ′ to the outer peripheral side of the belt cover layer 9 ′.
- the first molded body 31 and the second molded body 32 By removing the first molded body 31 and the second molded body 32 from the molding drums 21 and 22, respectively, and setting them on the shaping drum 23 as shown in FIG. 8, by applying an internal pressure using a bladder (not shown), The first molded body 31 is expanded in a toroidal shape, and is crimped to the inner peripheral side of the second molded body 32 disposed on the outer peripheral side. As a result, an unvulcanized tire is formed.
- the unvulcanized tire green tire
- the unvulcanized tire is expanded (lifted) in the mold of the tire vulcanizer, that is, vulcanized while expanding the tire circumference.
- the pneumatic tire for passenger cars shown in FIG. 1 is obtained.
- the steel cord 11 of the belt cover layer 9 ′ has a double twist structure in which the strand 15 and the strand 16 have the same twist direction, while the strand 16 has a twist pitch of 2.0 mm or less.
- the twist pitch of the material 11 is set to 5.0 mm or less, when the lift is applied to the unvulcanized tire in the mold during vulcanization, the steel cord material 11 is sufficiently stretched and the belt cover layer 9 ′ is lifted. Can follow. For this reason, generation
- the steel cord material 11 can extend and follow the lift even for tire specifications with different lift rates, so even for tire specifications with different lift rates. The same steel cord material 11 can be used.
- the elongation of the steel cord material 11 does not increase more than necessary.
- the vulcanized rubber 10 covers the periphery of the steel cord material 11, or the vulcanized rubber 10 in the gaps between the strands 16 of the steel cord material 11 or between the strands 15. Therefore, the steel cord material 11 becomes difficult to extend because the elongation is suppressed. That is, the rigidity of the steel cord material 11 is increased. This rigidity of the steel cord material 11 can greatly improve the high speed durability and the performance of road noise in the same manner as a conventional belt cover layer shaped in a wave shape.
- twist pitch of the strands 16 exceeds 2.0 mm
- the tire specifications with different lift rates expansion rates
- the steel cord material 11 may be difficult to stretch during the lift.
- the twist pitch of the steel cord material 11 exceeds 5.0 mm.
- the steel cord material 11 becomes too easy to stretch. As a result, the surrounding vulcanized rubber covering the steel cord material 11 cannot suppress the elongation, and high-speed durability is achieved. The effect of greatly improving the performance and the performance of road noise cannot be obtained. The same applies when the twist pitch of the steel cord 11 is less than 2.0 mm.
- the number M of strands 15 to be twisted is preferably 4 from the viewpoint of the stability of the cord structure.
- the number N of strands 16 to be twisted is preferably 4 or 5. When the number N is 3 or less, it becomes impossible to twist together at the small twist pitch described above. On the other hand, if the number is 6 or more, it is difficult to maintain the cord shape.
- the diameter D of the strand 15 is less than 0.18 mm and is preferably in the range of 0.08 mm to 0.15 mm.
- the steel cord material 11 of the belt cover layer 9 in a state where the tensile strength of the steel cord material 11 in the state of zero elongation before being coated with unvulcanized rubber is H b and expanded by the lift at the time of tire vulcanization is stretched.
- Hc the tensile stiffness of Hc
- H b the ratio H c / H b of the tensile stiffness H c to the tensile stiffness H b is preferably in the range of 1.6 to 2.4.
- This ratio H c / H b is determined by the degree of biting of the steel cord material 11 into the belt layer and the belt after vulcanization when the steel cord material 11 does not extend following the lift at the time of lift during vulcanization.
- the ratio H c / H b exceeds 2.4, it becomes difficult for the belt cover layer 9 to follow the lift during vulcanization, and it becomes easy to bite into the belt layer. If the ratio H c / H b is smaller than 1.6, the rigidity of the belt cover layer 11 is insufficient, so the high-speed durability and road noise performance are not improved.
- it can be achieved by setting the twist pitch of the strand and the twist pitch of the steel cord material 11 in the above-described range, and combining the values of the two twist pitches as appropriate. it can.
- a curve C 2 in FIG. 6 is a load-elongation curve of the steel cord material 11 after vulcanization.
- the tensile rigidity Hb of the steel cord material 11 is obtained as follows. That is, one steel cord material 11 is cut into a length of 600 mm, and each steel cord material 11 is broken at a test speed of 10 mm / min. Record the load (N) and elongation (%) until In the load-elongation curve obtained from that, the slope of the straight line between the load of 0 N and the load of 200 N is defined as the tensile rigidity Hb of the steel cord material 11.
- the tensile stiffness H c of the steel cord member 11 of the belt cover layer 9 which is in an extended state in response to expansion by the lift of the tire vulcanization can be as follows. That is, the load (N) and elongation (%) were recorded on one rubber-coated steel cord (length: 600 mm) taken out from the belt cover layer 9 of the vulcanized tire in the same manner as described above, and the load obtained therefrom. - in elongation curve, the rigidity H c tensile slope of load 0N when the load 200N o'clock straight.
- the belt cover layer 9 two layers of a belt full cover layer 9 ⁇ / b> A that covers the entire belt layer 8 and a belt edge cover layer 9 ⁇ / b> B that covers the end side of the belt layer 8 are provided.
- the pneumatic tire for passenger cars manufactured by the method of the present invention may be a pneumatic tire having any belt cover layer.
- the use of one steel cord 11 coated with unvulcanized rubber as described above reduces the edge of the steel cord material 11 as much as possible, and the belt cover layer 9 is preferable for increasing the durability.
- a strip material in which a plurality of steel cord materials 11 arranged in a band shape with a certain width are covered with unvulcanized rubber may be used.
- the present invention can be preferably used in a method for manufacturing a pneumatic tire for passenger cars, particularly used in passenger cars having a belt cover layer.
- Examples 1 to 18 and Comparative Examples 1 to 5 Ten pneumatic tires for passenger cars each having a tire size of 195 / 65R14 having the structure shown in FIG. 1 were produced (Examples 1 to 18 and Comparative Examples 1 to 5).
- a pneumatic tire having a structure shown in FIG. 1 is formed by using a steel cord material 11 having a 1 ⁇ 5 structure (wire diameter 0.15 mm, molded according to the above tire specifications) as a belt cover layer. 10 were produced (conventional example 1). Further, ten pneumatic tires having the structure shown in FIG.
- the steel cord material 11 used in Examples 1 to 18 and Comparative Examples 1 to 5 is 5 ⁇ in which five strands obtained by twisting four strands (diameter 0.11 mm) are twisted in the same direction as the strands. 4 or 4 ⁇ 4 double twist structure.
- the strand twist pitch and the steel cord twist pitch were determined as shown in Tables 1 to 4.
- the strand twist pitch and the steel cord twist pitch shown in Tables 1 to 4 are the twist pitch before receiving the lift.
- the lift rate during vulcanization of the produced tire is 2.2%.
- standard rim means “applied rim” defined in JATMA, “Design Rim” defined in TRA, or “Measuring Rim” defined in ETRTO.
- High-speed durability Each tire was attached to a drum testing machine, and a high-speed durability test was performed in accordance with a high-speed durability test described in JIS D423. The evaluation results were summarized as an index value with the tire of Example 3 as 100. The higher the index value, the better the high-speed durability.
- the steel cord material 11 in Examples 1 to 10 has a strand pitch smaller than that of the steel cord material 11 and a strand twist pitch of 1.0 mm to 2.0 mm (
- the tire product has a twist pitch of 2.0 to 5.0 mm (2.0 to 5.25 mm for tire products).
- the wire diameter d is preferably less than 0.18 mm.
- the wire diameter d is preferably 0.08 mm to 0.15 mm.
- Table 4 shows the effect of the ratio H c / H b in the steel cord material 11.
- the strand twist pitch is in the range of 1.0 mm to 2.0 mm (1.0 to 2.1 mm for tire products), and the steel cord material twist pitch is 2.0 to 5.
- the ratio H c / H b is not necessarily 1.6 to 2.4.
- Such a ratio Hc / Hb is determined by the combination of the strand twist pitch and the steel cord material twist pitch.
- the ratio H c / H b is 1.6 to 2.4, it can be produced without any problem (less vulcanization failure), and the high speed durability and road noise are improved as compared with the conventional examples 1 and 2.
- the ratio H c / H b is preferably 1.6 to 2.4.
- a pneumatic tire having a structure shown in FIG. 1 is formed by using a steel cord material 11 having a 1 ⁇ 5 structure (wire diameter 0.15 mm, molded according to the above tire specifications) as a belt cover layer. 10 were produced (conventional example 3). Furthermore, ten pneumatic tires having the structure shown in FIG. 1 were produced using an organic fiber belt cover layer formed of an organic fiber cord (nylon cord) instead of the steel cord material 11 as the belt cover layer 9.
- the steel cord material 11 used in Examples 19 to 28 and Comparative Examples 6 to 9 is 5 ⁇ in which five strands obtained by twisting four strands (diameter 0.11 mm) are twisted in the same direction as the strands. 4 or 4 ⁇ 4 double twist structure.
- the strand twist pitch and the steel cord twist pitch were determined as shown in Tables 1 to 4.
- the lift rate during vulcanization of the produced tire is 3.6%.
- the second embodiment is a tire having a higher lift rate during vulcanization than the first embodiment.
- Tables 5 and 6 not only the tires of Examples 19 to 28, but also the tire of Conventional Example 3 greatly increases the high speed durability and road noise performance without causing a vulcanization failure due to the belt cover layer.
- Conventional Example 4 has low evaluation of high-speed durability and road noise even if the lift rate is high. This is because the organic fiber belt cover layer is used, and the fastening effect due to the tensile rigidity of the belt cover layer does not sufficiently work. Therefore, in Examples 19 to 28, as in Conventional Example 3, the high speed durability and road noise performance are greatly improved without causing vulcanization failure due to the belt cover layer.
- the steel cord material 11 is superior to the conventionally typed steel cord in that the same steel cord material can be used as the belt cover layer 9 for tire specifications having different lift rates.
- the tightening effect due to the tensile rigidity of the belt cover layer is maintained when the steel cord material 11 is stretched during vulcanization, in the gap in the steel cord material 11. This is because the tensile rigidity of the steel cord material 11 is increased by filling the rubber and restraining the movement of the strands and the strands.
- the tensile rigidity of the steel cord of the tire of Conventional Example 1 in the first embodiment is determined by whether or not the molded shape still remains after the molded shape is stretched. For this reason, in the first embodiment, the molded steel cord does not fully stretch under the condition of a low lift rate, and the slack remains in the molded steel cord in the vulcanized tire, so that high speed durability and road noise performance are achieved. Evaluation is low. That is, steel cords with different types are required for tire specifications with different lift rates.
- the tire according to the present embodiment uses the steel cord material 11 for the belt cover layer 9 to greatly improve high-speed durability and road noise performance, similar to a tire using a molded steel cord material.
- vulcanization failure due to the belt cover layer can be suppressed.
- the steel cord material 11 can be stretched at the time of lift and the belt cover layer 9 can follow the lift even for tire specifications having different expansion rates (lift rates). For this reason, the tire according to the present embodiment, even when using the same steel cord material for different tire specifications, greatly improves high-speed durability and road noise performance, while vulcanizing failure due to the belt cover layer Can be suppressed.
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Abstract
Description
ベルト層と、
前記ベルト層の外周側にスチールコード材をタイヤ周方向に巻回すことにより形成されたベルトカバー層と、を有し、
前記スチールコード材は、複数本のスチールからなる、線の直径が0.18mm未満の素線を撚り合せて構成された複数のストランドを、前記素線の撚り方向と同じ方向に撚り合わせた構造を備え、
前記ストランドそれぞれの撚りピッチが前記スチールコード材の撚りピッチより小さく、前記ストランドの撚りピッチが1.0mm~2.1mmであり、前記スチールコード材の撚りピッチが2.0mm~5.25mmである、乗用車用空気入りタイヤである。
ベルト層の外周側に未加硫ゴムで被覆したスチールコード材をタイヤ周方向に巻回してベルトカバー層を成形することにより、グリーンタイヤを作製する工程と、
前記ベルトカバー層を有する前記グリーンタイヤの周長を拡張しつつ、加硫を行う工程と、を有し、
前記スチールコード材は、複数本のスチールからなる、線の直径が0.18mm未満の素線を撚り合せて構成された複数のストランドを、前記素線の撚り方向と同じ方向に撚り合わせた構造を備え、
前記ストランドそれぞれの撚りピッチが前記スチールコード材の撚りピッチより小さく、前記ストランドの撚りピッチが1.0mm~2.0mmであり、前記スチールコード材の撚りピッチが2.0mm~5.0mmである、乗用車用空気入りタイヤの製造方法である。
しかも、このスチールコード材は、拡張率(リフト率)が異なるタイヤスペックに対しても、リフト時にスチールコード材が伸びてベルトカバー層がそのリフトに追従することが可能である、このため、上述の形態の乗用車用空気入りタイヤは、異なるタイヤスペックに対しても同じスチールコード材を使用しても、高速耐久性及びロードノイズの性能を大きく改善しつつ、ベルトカバー層に起因する加硫故障を抑制することができる。
さらに、上記ストランドそれぞれの撚りピッチがスチールコード材11の撚りピッチより小さい。上記ストランドの撚りピッチは1.0mm~2.1mmであり、スチールコード材11の撚りピッチは2.0mm~5.25mmである。これらの撚りピッチの値は、リフトを受けたタイヤにおける寸法である。なお、本実施形態では、上記ストランドの撚りピッチの上限および上記スチールコード材11の撚りピッチの上限は、それぞれ2.1mmおよび5.25mmである。これらの値は、加硫後のリフトしたタイヤにおける撚りピッチである。加硫前の未リフト時の撚りピッチの上限は、後述するように、それぞれ2.0mmおよび5.0mmである。加硫時におけるグリーンタイヤの周長の拡張率(リフト率)をαとしたとき、撚りピッチは、2.0×(1+α/100)および5.0×(1+α/100)となる。拡張率(リフト率)の上限は略5%であるので、加硫後のリフトしたタイヤにおける撚りピッチの上限は、それぞれ2.1mm(=2.0×1.05)および5.25mm(=5.0×1.05)となる。
本実施形態では、上記ストランドの撚りピッチの下限および上記スチールコード材11の撚りピッチの下限は、それぞれ1.0mm(加硫後)および2.0mm(加硫後)である。加硫前の未リフト時の撚りピッチの下限も、それぞれ1.0mmおよび2.0mmである。このように、加硫前と加硫後における下限の値が変わらないのは、拡張率が極めて低い場合もあるからである。
加硫後のベルトカバー層9から取り出したスチールコード材11の引張剛性をHc’とし、加硫後のベルトカバー層9から被覆するゴムを除去しかつスチールコード材11の空隙に充填するゴムを除去したスチールコード材11の引張剛性Hb’とする。このとき比Hc’/Hb’が、1.6~2.4であることが好ましい。加硫後のベルトカバー層9からスチールコード材を被覆するゴムを除去する方法は、例えば、スチールコード材をベルトカバー層9から引き抜くことによって行われる。また、加硫後のベルトカバー層9からスチールコード材を被覆するゴムを除去するのに加え、空隙に充填するゴムを除去するために、引き抜いたスチール線材は有機溶剤等に浸漬される。これにより被覆したゴムおよび空隙に充填されているゴムを溶かすことができる。これにより、被覆するゴムを除去しかつ空隙に充填するゴムを除去したスチールコード材を得ることができる。
このような引張剛性の比Hc’/Hb’が、1.6~2.4であることにより、ベルトカバー層9が加硫時のリフトにより確実に追従し、かつ、ベルトカバー層11の締め付け効果(拘束効果)をより効果的に発揮することができる。
スチールコード材11において、素線15を撚り合せて構成されるストランド16の撚りピッチが、ストランド16を撚り合わせて構成されるスチールコード材11の撚りピッチより小さくなっている。ストランド16の撚りピッチは1.0mm~2.0mmの範囲、スチールコード材11の撚りピッチは2.0mm~5.0mmの範囲に設定されている。このように構成されるスチールコード材11は、図6に示すように、荷重-伸び曲線において、曲線C1の傾きが大きく変化する変曲点を有する特性を備えている。
ここで、タイヤの加硫段階でタイヤの周長を拡張するリフトにおいて、スチールコード材11の伸びは、上記変曲点における伸びより低い、図6中のR領域で行われる。
実施例1~18と比較例1~5に用いるスチールコード材11は、4本の素線(直径0.11mm)を撚り合せた5本のストランドを素線と同じ方向に撚り合わせた5×4または4×4の複撚り構造である。ストランドの撚りピッチとスチールコードの撚りピッチは表1~4に示すように定めた。表1~4に示すストランドの撚りピッチとスチールコードの撚りピッチは、リフトを受ける前の撚りピッチである。
作製したタイヤの加硫時のリフト率は、2.2%である。
ここで、「標準リム」とは、JATMAに規定される「適用リム」、TRAに規定される「Design Rim」、あるいはETRTOに規定される「Measuring Rim」をいう。
高速耐久性
各タイヤをドラム試験機に取り付け、JISD423に記載される高速耐久性の試験に準拠して高速耐久性試験を実施した。その評価結果を実施例3のタイヤを100とする指数値で纏めた。指数値が大きい程、高速耐久性が優れている。
ロードノイズ
各タイヤを排気量3600ccの車両に取り付け、テストコースにおいて実車走行した際の車内騒音をテストドライバーが感応評価をした。その評価結果を実施例3のタイヤを100とする指数値で示す。指数値が大きい程、ロードノイズの音圧レベルが低く、騒音性能が優れている。
従来例1では、リフト時に型付けしたスチールコードが伸び切らず、加硫後のタイヤにおいて型付けしたスチールコードに弛みが残るため、高速耐久性とロードノイズの性能が低下している。即ち、本タイヤにおけるタイヤスペックではスチールコードが適切でなく、異なる型付け率を有するスチールコードが必要であることがわかる。
このため、従来例1の高速耐久性とロードノイズの評価は、有機繊維コード(ナイロンコード)で形成した有機繊維ベルトカバー層を用いた従来例2と同等となっている。
高速耐久性およびロードノイズの点から、素線の直径dが0.08mm~0.15mmであることが好ましい。
表4に示すように、ストランドの撚りピッチが1.0mm~2.0mm(タイヤ製品で1.0~2.1mm)の範囲内にあり、スチールコード材の撚りピッチが2.0~5.0mm(タイヤ製品で2.0mm~5.0)mmの範囲内にあっても、必ずしも比Hc/Hbは1.6~2.4ではない。このような比Hc/Hbは、ストランドの撚りピッチとスチールコード材の撚りピッチの組み合わせによって定まる。比Hc/Hbは1.6~2.4であることにより、問題なく製造でき(加硫故障が少なく)、しかも高速耐久性およびロードノイズが従来例1,2対比向上する。この点で、比Hc/Hbが1.6~2.4であることが好ましい。
実施例19~28と比較例6~9に用いるスチールコード材11は、4本の素線(直径0.11mm)を撚り合せた5本のストランドを素線と同じ方向に撚り合わせた5×4または4×4の複撚り構造である。ストランドの撚りピッチとスチールコードの撚りピッチは表1~4に示すように定めた。
作製したタイヤの加硫時のリフト率は、3.6%である。
また、加硫故障がないタイヤを選択し、それらをそれぞれ「標準リム」に装着し、空気圧を196kPaにして、第1実施例に示す試験方法により、高速耐久性及びロードノイズの評価試験を実施した。評価結果は、表5,6に示されている。
このため、実施例19~28では、従来例3と同様に、ベルトカバー層に起因する加硫故障を招くことなく、高速耐久性とロードノイズの性能が大きく改善する。
このように、スチールコード材11は、ベルトカバー層9として、リフト率が異なるタイヤスペックに対しても同じスチールコード材を使用できる点で、従来の型付けされたスチールコードに対して優れている。
このように、スチールコード材11がリフト率が異なってもベルトカバー層の引張剛性による締め付け効果を維持するのは、加硫時にスチールコード材11が伸びたとき、スチールコード材11にある空隙にゴムが充填して、ストランド及び素線の動きを拘束することにより、スチールコード材11の引張剛性が上昇するからである。
しかも、このスチールコード材11は、拡張率(リフト率)が異なるタイヤスペックに対しても、リフト時にスチールコード材11が伸びてベルトカバー層9がそのリフトに追従することが可能である。このため、本実施形態のタイヤは、異なるタイヤスペックに対しても同じスチールコード材を使用しても、高速耐久性及びロードノイズの性能を大きく改善しつつ、ベルトカバー層に起因する加硫故障を抑制することができる。
9,9’ ベルトカバー層
11 スチールコード材
15 素線
16 ストランド
D 直径
Claims (11)
- 乗用車用空気入りタイヤであって、
ベルト層と、
前記ベルト層の外周側にスチールコード材をタイヤ周方向に巻回すことにより形成されたベルトカバー層と、を有し、
前記スチールコード材は、複数本のスチールからなる、線の直径が0.18mm未満の素線を撚り合せて構成された複数のストランドを、前記素線の撚り方向と同じ方向に撚り合わせた構造を備え、
前記ストランドそれぞれの撚りピッチが前記スチールコード材の撚りピッチより小さく、前記ストランドの撚りピッチが1.0mm~2.1mmであり、前記スチールコード材の撚りピッチが2.0mm~5.25mmである、乗用車用空気入りタイヤ。 - 前記スチールコード材はゴムで被覆されるとともに、前記スチールコード材の空隙にゴムが充填されており、
前記ベルトカバー層から被覆するゴムを除去しかつ充填するゴムを除去したときの前記スチールコード材の引張剛性に対する、前記ベルトカバー層から取り出した前記スチールコード材の引張剛性の比が、1.6~2.4である、請求項1に記載の乗用車用空気入りタイヤ。 - 前記スチールコード材は、4本の素線を撚り合わせた、4本または5本のストランドを有する、請求項1または2に記載の乗用車用空気入りタイヤ。
- 前記素線の直径が0.08mm~0.15mmである、請求項1~3のいずれか1項に記載の乗用車用空気入りタイヤ。
- 前記ベルトカバー層は、前記スチールコード材が1本を単位として、タイヤ周方向に螺旋状に巻回されて構成されている、請求項1~4のいずれか1項に記載の乗用車用空気入りタイヤ。
- 乗用車用空気入りタイヤの製造方法であって、
ベルト層の外周側に未加硫ゴムで被覆したスチールコード材をタイヤ周方向に巻回してベルトカバー層を成形することにより、グリーンタイヤを作製する工程と、
前記ベルトカバー層を有する前記グリーンタイヤの周長を拡張しつつ、加硫を行う工程と、を有し、
前記スチールコード材は、複数本のスチールからなる、線の直径が0.18mm未満の素線を撚り合せて構成された複数のストランドを、前記素線の撚り方向と同じ方向に撚り合わせた構造を備え、
前記ストランドそれぞれの撚りピッチが前記スチールコード材の撚りピッチより小さく、前記ストランドの撚りピッチが1.0mm~2.0mmであり、前記スチールコード材の撚りピッチが2.0mm~5.0mmである、乗用車用空気入りタイヤの製造方法。 - 前記加硫後の前記スチールコード材はゴムで被覆されるとともに、前記スチールコード材の空隙にゴムが充填されており、
前記加硫後の前記ベルトカバー層から被覆するゴムを除去しかつ充填するゴムを除去したときの前記スチールコード材の引張剛性に対する、前記加硫後の前記ベルトカバー層から取り出した前記スチールコード材の引張剛性の比が、1.6~2.4である、請求項6に記載の方法。 - 加硫後の前記スチールコード材の引張剛性Hcと未加硫ゴムで被覆する前の前記スチールコード材の引張剛性をHbとの比Hc/Hbが1.6~2.4である、請求項7に記載の方法。
- 前記スチールコード材は、4本の素線を撚り合わせた、4本または5本のストランドを有する、請求項6~8のいずれか1項に記載の方法。
- 前記素線の直径が0.08mm~0.15mmである、請求項6~9のいずれか1項に記載の方法。
- 前記ベルトカバー層を成形するとき、前記スチールコード材1本を、タイヤ周方向に螺旋状に巻回して、前記ベルトカバー層を成形する、請求項6~10のいずれか1項に記載の方法。
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US13/147,764 US20110290398A1 (en) | 2009-02-03 | 2010-02-02 | Pneumatic tire for passenger car and method of manufacturing the same |
CN201080005641.6A CN102292223B (zh) | 2009-02-03 | 2010-02-02 | 乘用车用充气轮胎以及乘用车用充气轮胎的制造方法 |
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Cited By (1)
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JP7334234B2 (ja) | 2018-07-25 | 2023-08-28 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | 高圧縮性オープンコード |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5377996B2 (ja) * | 2009-02-03 | 2013-12-25 | 東京製綱株式会社 | スチールコード |
DE102012108173A1 (de) | 2012-09-04 | 2014-03-06 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen, vorzugsweise Nutzfahrzeugluftreifen |
CN105648810A (zh) * | 2014-06-18 | 2016-06-08 | 贝卡尔特公司 | 用于加强充气轮胎的钢丝帘线 |
WO2021124154A1 (en) * | 2019-12-17 | 2021-06-24 | Pirelli Tyre S.P.A. | Metallic reinforcing cord for tyres for vehicle wheels |
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JPH0478602A (ja) * | 1990-07-13 | 1992-03-12 | Bridgestone Corp | 空気入りタイヤ |
JP2009040347A (ja) * | 2007-08-10 | 2009-02-26 | Sumitomo Rubber Ind Ltd | 帯状プライ及びそれを用いた空気入りタイヤ |
JP2009234332A (ja) * | 2008-03-26 | 2009-10-15 | Toyo Tire & Rubber Co Ltd | 空気入りラジアルタイヤ |
JP2009292425A (ja) * | 2008-06-09 | 2009-12-17 | Toyo Tire & Rubber Co Ltd | 大型空気入りラジアルタイヤ |
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JPS5929503A (ja) * | 1982-08-10 | 1984-02-16 | Bridgestone Corp | 耐久性にすぐれるラジアルタイヤ |
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JP2659072B2 (ja) * | 1988-12-16 | 1997-09-30 | 住友電気工業株式会社 | ゴム補強用スチールコード |
US5048280A (en) * | 1988-12-27 | 1991-09-17 | Sumimoto Electric Industries, Ltd. | Steel composite cord |
JPH0569702A (ja) * | 1991-09-13 | 1993-03-23 | Toyo Tire & Rubber Co Ltd | ラジアルタイヤ |
US5487262A (en) * | 1993-04-20 | 1996-01-30 | N.V. Bekaert S.A. | Method and device for overtwisting and undertwisting a steel cord |
JPH1044713A (ja) * | 1996-07-30 | 1998-02-17 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
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JP3053390B2 (ja) * | 1998-08-04 | 2000-06-19 | 住友ゴム工業株式会社 | ランフラットタイヤ |
EP1353810B1 (en) * | 2000-12-27 | 2012-08-29 | Pirelli Tyre S.p.A. | Reinforced tyre |
JP4283463B2 (ja) * | 2001-06-29 | 2009-06-24 | 住友ゴム工業株式会社 | 空気入りタイヤ |
ES2339437T3 (es) * | 2002-04-18 | 2010-05-20 | Bridgestone Corporation | Neumatico. |
US7404425B2 (en) * | 2002-04-24 | 2008-07-29 | The Goodyear Tire & Rubber Company | Belt package for super single truck tires |
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US7216684B2 (en) * | 2003-12-29 | 2007-05-15 | The Goodyear Tire & Rubber Company | Pneumatic aviation tire |
WO2007020156A1 (en) * | 2005-08-19 | 2007-02-22 | Nv Bekaert Sa | A polymer impregnated steel cord |
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2010
- 2010-02-02 DE DE112010000860.4T patent/DE112010000860B4/de not_active Expired - Fee Related
- 2010-02-02 CN CN201080005641.6A patent/CN102292223B/zh not_active Expired - Fee Related
- 2010-02-02 US US13/147,764 patent/US20110290398A1/en not_active Abandoned
- 2010-02-02 WO PCT/JP2010/000599 patent/WO2010089990A1/ja active Application Filing
- 2010-02-02 JP JP2010516311A patent/JP4553074B1/ja not_active Expired - Fee Related
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JPH0478602A (ja) * | 1990-07-13 | 1992-03-12 | Bridgestone Corp | 空気入りタイヤ |
JP2009040347A (ja) * | 2007-08-10 | 2009-02-26 | Sumitomo Rubber Ind Ltd | 帯状プライ及びそれを用いた空気入りタイヤ |
JP2009234332A (ja) * | 2008-03-26 | 2009-10-15 | Toyo Tire & Rubber Co Ltd | 空気入りラジアルタイヤ |
JP2009292425A (ja) * | 2008-06-09 | 2009-12-17 | Toyo Tire & Rubber Co Ltd | 大型空気入りラジアルタイヤ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7334234B2 (ja) | 2018-07-25 | 2023-08-28 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | 高圧縮性オープンコード |
Also Published As
Publication number | Publication date |
---|---|
DE112010000860B4 (de) | 2016-09-08 |
CN102292223B (zh) | 2014-05-07 |
CN102292223A (zh) | 2011-12-21 |
JP4553074B1 (ja) | 2010-09-29 |
DE112010000860T5 (de) | 2012-08-02 |
JPWO2010089990A1 (ja) | 2012-08-09 |
US20110290398A1 (en) | 2011-12-01 |
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