WO2014132761A1 - Pneumatic tire, and automobile travel method - Google Patents

Pneumatic tire, and automobile travel method Download PDF

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Publication number
WO2014132761A1
WO2014132761A1 PCT/JP2014/052643 JP2014052643W WO2014132761A1 WO 2014132761 A1 WO2014132761 A1 WO 2014132761A1 JP 2014052643 W JP2014052643 W JP 2014052643W WO 2014132761 A1 WO2014132761 A1 WO 2014132761A1
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Prior art keywords
pneumatic tire
rubber
surface roughness
grip performance
tread
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PCT/JP2014/052643
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French (fr)
Japanese (ja)
Inventor
多田　俊生
健夫 中園
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住友ゴム工業株式会社
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Publication of WO2014132761A1 publication Critical patent/WO2014132761A1/en

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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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
    • 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
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C1/0016—Compositions of the tread
    • 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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
    • B60C2011/0016—Physical properties or dimensions

Definitions

  • the present invention relates to a pneumatic tire and a method of running a vehicle on which the pneumatic tire is mounted.
  • Patent Document 1 discloses a pneumatic tire having improved performance on ice and the like by adjusting the tread surface roughness and rubber hardness after traveling to a predetermined range using particles and the like having cellulose as a main component. .
  • improvement in terms of improvement in wet grip performance there is still room for improvement in terms of improvement in wet grip performance.
  • An object of the present invention is to solve the above-mentioned problems and to provide a pneumatic tire having good wet grip performance, and an automobile traveling method using the pneumatic tire.
  • the present invention relates to a pneumatic tire having a tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of a road surface.
  • Rz tr be 7 to 10 ⁇ m.
  • the present invention also relates to a method of driving a vehicle by mounting the pneumatic tire on a vehicle.
  • the pneumatic tire since the pneumatic tire has the tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of the road surface, excellent wet grip performance can be obtained.
  • the pneumatic tire according to the present invention has the tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of the road surface.
  • the tread surface roughness Rz tr and the surface roughness Rz ro of the road surface in the present invention are ten-point average roughness (Rz JIS) measured according to Annex 1 (reference) of JIS B0601: 2001.
  • the tread surface roughness Rz tr is preferably 7 to 15 ⁇ m, more preferably 7 to 12 ⁇ m, and still more preferably 7 to 10 ⁇ m. If the thickness is less than 7 ⁇ m, the tread surface may be too smooth and improvement in wet grip performance may not be expected. If the thickness exceeds 15 ⁇ m, the tread surface roughness is too large with respect to the road surface, similar to the case where the roughness is small. There is a possibility that improvement in wet grip performance can not be expected.
  • the adjustment of Rz tr in the present invention can be carried out without particular limitation by a method capable of adjusting the surface roughness, such as buffing of the tread surface, addition of a water-soluble compound, addition of a material that volatilizes at the vulcanization temperature, and a method of sticking a needle , Etc. Among them, addition of a water-soluble compound is preferable.
  • the water-soluble compound is not particularly limited as long as it is a compound that dissolves in water, for example, water-soluble salts such as sodium chloride, sodium sulfate and sodium nitrate; starch, polyamine, polyvinyl alcohol, polyacrylic And water-soluble polymers such as acids, polyacrylamides, polyethylene oxides, polyvinyl pyrrolidones, and polyvinyl amides.
  • water-soluble salts are preferable, and sodium chloride is more preferable from the viewpoint of safety. These can be used alone or in combination of two or more.
  • the average particle diameter of the water-soluble compound (fine particles of the water-soluble compound) is suitably selected according to the surface roughness of the road surface, for example, preferably 7 to 15 ⁇ m, more preferably 7 to 12 ⁇ m, More preferably, it is 10 ⁇ m.
  • the average particle size can be measured by transmission electron microscope (TEM) observation. Specifically, the photograph is taken with a transmission electron microscope, and if the shape of the fine particle is spherical, the diameter of the sphere, if it is needle-like or rod-like, the short diameter, and if it is amorphous, the average particle diameter from the central part The diameter is taken as the average particle diameter of 100 particles.
  • the tread hardness of the pneumatic tire is preferably 60 or more, more preferably 65 or more, and still more preferably 68 or more. By setting the hardness to 60 or more, the frictional force of the rubber due to the engagement between the tread surface and the road surface becomes high, and the wet grip performance can be improved.
  • the tread hardness is preferably 75 or less, more preferably 72 or less, from the viewpoint of improving the durability to chipping and the like.
  • the hardness of the tread rubber in the present invention is a hardness measured by a type A durometer (measurement temperature 25 ° C.) in accordance with JIS K6253-3: 2012.
  • the tread includes a rubber composition having the above-mentioned characteristics, and, for example, a tread rubber composition containing a rubber component, a reinforcing filler and the like can be used.
  • NR natural rubber
  • EMR epoxidized natural rubber
  • IR isoprene rubber
  • SBR styrene butadiene rubber
  • BR butadiene rubber
  • EPDM ethylene-propylene-diene rubber
  • X-IIR chloroprene rubber
  • NBR acrylonitrile
  • SBR is preferable in terms of wet grip performance.
  • the reinforcing filler is not particularly limited, but among them, carbon black and silica are preferable.
  • the nitrogen adsorption specific surface area (N 2 SA) of carbon black is preferably 70 to 140 m 2 / g, more preferably 90 to 120 m 2 / g (in accordance with JIS K 6217-2: 2001).
  • the content of carbon black is preferably 20 to 100 parts by mass, more preferably 35 to 65 parts by mass, with respect to 100 parts by mass of the rubber component.
  • the water soluble compound may be blended in the rubber composition.
  • the content of the water-soluble compound is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 10 parts by mass with respect to 100 parts by mass of the rubber component, in terms of obtaining excellent wet grip performance. 2 parts by mass.
  • compounding agents generally used in the production of rubber compositions such as zinc oxide, stearic acid, antiaging agents, softeners such as oil, wax, sulfur, vulcanized An accelerator etc. can be mix
  • the rubber composition is manufactured by a general method. That is, it can manufacture by the method etc. which knead
  • the pneumatic tire of the present invention is manufactured by the usual method using the above rubber composition. That is, a rubber composition containing various additives according to need is extruded according to the shape of the tread at the unvulcanized stage, and molded by a usual method on a tire molding machine. It bonds together with a member and forms an unvulcanized tire.
  • the unvulcanized tire can be heated and pressurized in a vulcanizer to produce a pneumatic tire.
  • the pneumatic tire of the present invention can be used as various tires such as tires for passenger cars, tires for trucks and buses, and studless tires. Among them, since it is excellent in wet grip performance, it can be suitably used as a wet road surface tire.
  • the pneumatic tire is mounted on a vehicle, and when the mounted vehicle is run on a road surface, the road surface and the tread surface are engaged to increase the frictional force of rubber. Wet grip performance is significantly improved.
  • SBR 1502 manufactured by JSR Corporation Carbon black: Diablack I manufactured by Mitsubishi Chemical Corporation Stearic acid: Zinc oxide manufactured by NOF Corporation: Zinc oxide manufactured by Mitsui Mining & Smelting Co., Ltd.
  • Antioxidant Santoflex 13 manufactured by Flexis Wax: Ozo Ace 0355 manufactured by Nippon Seiwa Co., Ltd.
  • Sulfur Powdered sulfur from Tsurumi Chemical Industry Co., Ltd. (200 mesh 5% oil included)
  • Vulcanization accelerator Noccellar CZ of Ouchi Emerging Chemical Industry Co., Ltd.
  • the friction force ⁇ was calculated by running the distance of 300 m, averaging the friction force at that time, and dividing by the load. The larger ⁇ is, the better the wet grip performance is.
  • the tread surface roughness Rz tr of the tires 1 to 8 and the surface roughness Rz ro of the road surface were observed using a laser microscope VK9500 manufactured by Keyence Corporation. By moving the stage in one direction and further connecting the images, height information was obtained for an area of width 1.28 mm and length 10.1 mm. The objective lens used 10 times. Each data score was 432 points and 3685 points. And ten-point average roughness was measured according to Annex 1 (reference) of JIS B0601: 2001.

Abstract

Provided are a pneumatic tire having good wet grip performance, and an automobile travel method using said pneumatic tire. The invention relates to a pneumatic tire in which the tread surface roughness (Rztr) is adjusted in accordance with the surface roughness (Rzro) of the road surface.

Description

空気入りタイヤ及び自動車走行方法Pneumatic tire and vehicle running method
本発明は、空気入りタイヤ、及び該空気入りタイヤを装着させる自動車走行方法に関するものである。 The present invention relates to a pneumatic tire and a method of running a vehicle on which the pneumatic tire is mounted.
自動車用タイヤには種々の性能が要求され、特に安全性重視の観点からウェットグリップ性能に優れることが望まれている。タイヤのウェットグリップ性能を改善する手段として、従来から０℃におけるｔａｎδを高める方法が知られており、様々な技術が提案されている。 Various performances are required of automobile tires, and in particular, it is desired that the wet grip performance be excellent from the viewpoint of safety. As a means to improve the wet grip performance of a tire, methods for increasing tan δ at 0 ° C. are conventionally known, and various techniques have been proposed.
更に特許文献１には、セルロースを主成分とする粒子などを用いて走行後のトレッド表面粗さやゴム硬度を所定範囲に調整することにより、氷上性能などを改善した空気入りタイヤが開示されている。しかし、ウェットグリップ性能の改善という点では未だ改善の余地を残している。 Furthermore, Patent Document 1 discloses a pneumatic tire having improved performance on ice and the like by adjusting the tread surface roughness and rubber hardness after traveling to a predetermined range using particles and the like having cellulose as a main component. . However, there is still room for improvement in terms of improvement in wet grip performance.
特開２００３－１９２８４４号公報JP 2003-192844 A
本発明は、前記課題を解決し、良好なウェットグリップ性能を有する空気入りタイヤ、及び該空気入りタイヤを用いて自動車走行方法を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems and to provide a pneumatic tire having good wet grip performance, and an automobile traveling method using the pneumatic tire.
本発明は、路面の表面粗さＲｚｒｏに合わせてトレッド表面粗さＲｚｔｒを調整した空気入りタイヤに関する。 The present invention relates to a pneumatic tire having a tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of a road surface.
０．６≦Ｒｚｔｒ／Ｒｚｒｏ≦１．３に調整することが好ましい。 It is preferable to adjust to 0.6 ≦ Rz tr / Rz ro ≦ 1.3.
Ｒｚｔｒが７～１０μｍであることが好ましい。 It is preferable that Rz tr be 7 to 10 μm.
本発明はまた、前記空気入りタイヤを自動車に装着させる自動車走行方法に関する。 The present invention also relates to a method of driving a vehicle by mounting the pneumatic tire on a vehicle.
本発明によれば、路面の表面粗さＲｚｒｏに合わせてトレッド表面粗さＲｚｔｒを調整した空気入りタイヤであるので、優れたウェットグリップ性能を得ることができる。 According to the present invention, since the pneumatic tire has the tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of the road surface, excellent wet grip performance can be obtained.
本発明の空気入りタイヤは、路面の表面粗さＲｚｒｏに合わせてトレッド表面粗さＲｚｔｒを調整したものである。 The pneumatic tire according to the present invention has the tread surface roughness Rz tr adjusted in accordance with the surface roughness Rz ro of the road surface.
自動車を走行させる路面の表面粗さ（Ｒｚｒｏ）とトレッド表面（接地面）の表面粗さ（Ｒｚｔｒ）とが同一又は近似する値になるようにＲｚｔｒを調整することにより、ウェットグリップ性能が高められる。これは、ＲｚｔｒをＲｚｒｏに近づけると、路面とトレッド表面が噛み合ってゴムの摩擦力が増大し、路面の凹凸とトレッド表面の凹凸と引っかかりが大きくなることで、ウェットグリップ性能が顕著に改善されるものと推察される。 Wet grip performance by adjusting Rz tr so that the surface roughness (Rz ro ) of the road surface on which the vehicle is driven and the surface roughness (Rz tr ) of the tread surface (grounding surface) become the same or similar values Is enhanced. This is because, when Rz tr approaches Rz ro , the road surface and the tread surface mesh with each other, the frictional force of the rubber increases, and the unevenness of the road surface and the unevenness and catching of the tread surface become large, thereby significantly improving the wet grip performance. It is presumed that
なお、本発明におけるトレッド表面粗さＲｚｔｒ、路面の表面粗さＲｚｒｏは、ＪＩＳ　Ｂ０６０１：２００１の附属書１（参考）に準拠して測定した十点平均粗さ（ＲｚＪＩＳ）である。 The tread surface roughness Rz tr and the surface roughness Rz ro of the road surface in the present invention are ten-point average roughness (Rz JIS) measured according to Annex 1 (reference) of JIS B0601: 2001.
本発明では、トレッド表面粗さＲｚｔｒ／路面の表面粗さＲｚｒｏが１．０に近いほどウェットグリップ性能が高まり、好ましくは０．６≦Ｒｚｔｒ／Ｒｚｒｏ≦１．３、より好ましくは０．７≦Ｒｚｔｒ／Ｒｚｒｏ≦１．２、特に好ましくはＲｚｔｒ／Ｒｚｒｏ＝１．０である。 In the present invention, the wet grip performance is enhanced as the tread surface roughness Rz tr / surface roughness Rz ro of the road surface approaches 1.0, preferably 0.6 ≦ Rz tr / Rz ro ≦ 1.3, more preferably 0.7 ≦ Rz tr / Rz ro ≦ 1.2, particularly preferably Rz tr / Rz ro = 1.0.
トレッド表面粗さＲｚｔｒは、好ましくは７～１５μｍ、より好ましくは７～１２μｍ、更に好ましくは７～１０μｍである。７μｍ未満であると、トレッド表面が平滑すぎて、ウェットグリップ性能の向上が見込めないおそれがあり、１５μｍを超えると、トレッド表面粗さが路面に対して大きすぎるため、粗さが小さい場合と同様、ウェットグリップ性能の向上が見込めないおそれがある。 The tread surface roughness Rz tr is preferably 7 to 15 μm, more preferably 7 to 12 μm, and still more preferably 7 to 10 μm. If the thickness is less than 7 μm, the tread surface may be too smooth and improvement in wet grip performance may not be expected. If the thickness exceeds 15 μm, the tread surface roughness is too large with respect to the road surface, similar to the case where the roughness is small. There is a possibility that improvement in wet grip performance can not be expected.
本発明におけるＲｚｔｒの調整は、表面粗さの調整可能な方法を特に制限なく使用でき、トレッド表面のバフ加工、水溶性化合物の添加、加硫温度で揮発する材料の添加、針を刺す手法、などが挙げられる。なかでも、水溶性化合物の添加が好ましい。例えば、粒径（直径）７～１０μｍの水溶性化合物を混練して作製したタイヤを自動車に装着して湿潤路面を走行させると、水溶性化合物が路面上の水分と接触して溶解し、トレッド表面に７～１０μｍの凹凸が形成されるため、同程度の凹凸を持つ路面上でのウェットグリップ性能を顕著に改善できる。 The adjustment of Rz tr in the present invention can be carried out without particular limitation by a method capable of adjusting the surface roughness, such as buffing of the tread surface, addition of a water-soluble compound, addition of a material that volatilizes at the vulcanization temperature, and a method of sticking a needle , Etc. Among them, addition of a water-soluble compound is preferable. For example, when a tire manufactured by kneading a water-soluble compound having a particle diameter (diameter) of 7 to 10 μm is mounted on a car and travels on a wet road surface, the water-soluble compound dissolves in contact with water on the road surface, The unevenness of 7 to 10 μm is formed on the surface, so that the wet grip performance on a road surface having the same degree of unevenness can be remarkably improved.
水溶性化合物（水溶性化合物の微粒子）は、水に溶解する化合物であれば特に限定されず、例えば、塩化ナトリウム、硫酸ナトリウム、硝酸ナトリウムなどの水溶性塩；デンプン、ポリアミン、ポリビニルアルコール、ポリアクリル酸、ポリアクリルアミド、ポリエチレンオキシド、ポリビニルピロリドン、ポリビニルアミドなどの水溶性ポリマーなどが挙げられる。なかでも、水溶性塩が好ましく、安全性の観点から、塩化ナトリウムがより好ましい。これらは、単独又は２種以上を組み合わせて使用できる。 The water-soluble compound (microparticles of the water-soluble compound) is not particularly limited as long as it is a compound that dissolves in water, for example, water-soluble salts such as sodium chloride, sodium sulfate and sodium nitrate; starch, polyamine, polyvinyl alcohol, polyacrylic And water-soluble polymers such as acids, polyacrylamides, polyethylene oxides, polyvinyl pyrrolidones, and polyvinyl amides. Among them, water-soluble salts are preferable, and sodium chloride is more preferable from the viewpoint of safety. These can be used alone or in combination of two or more.
水溶性化合物（水溶性化合物の微粒子）の平均粒子径は、路面の表面粗さに合わせた値を適宜採用することが好適で、例えば、７～１５μｍが好ましく、７～１２μｍがより好ましく、７～１０μｍが更に好ましい。なお、本明細書において、平均粒子径は、透過型電子顕微鏡（ＴＥＭ）観察にて測定できる。具体的には、透過型電子顕微鏡で写真撮影し、微粒子の形状が球形の場合は球の直径、針状又は棒状の場合は短径、不定型の場合は中心部からの平均粒径を粒子径とし、１００個の平均値を平均粒子径とする。 The average particle diameter of the water-soluble compound (fine particles of the water-soluble compound) is suitably selected according to the surface roughness of the road surface, for example, preferably 7 to 15 μm, more preferably 7 to 12 μm, More preferably, it is 10 μm. In the present specification, the average particle size can be measured by transmission electron microscope (TEM) observation. Specifically, the photograph is taken with a transmission electron microscope, and if the shape of the fine particle is spherical, the diameter of the sphere, if it is needle-like or rod-like, the short diameter, and if it is amorphous, the average particle diameter from the central part The diameter is taken as the average particle diameter of 100 particles.
前記空気入りタイヤのトレッド硬度は、好ましくは６０以上、より好ましくは６５以上、更に好ましくは６８以上である。硬度を６０以上にすることで、トレッド表面と路面のかみ合いによるゴムの摩擦力が高くなり、ウェットグリップ性能を改善できる。また、該トレッド硬度は、欠けなどに対する耐久性向上の観点から、好ましくは７５以下、より好ましくは７２以下である。なお、本発明におけるトレッドゴムの硬度は、ＪＩＳ　Ｋ６２５３－３：２０１２に準拠し、タイプＡデュロメーター（測定温度２５℃）で測定した硬度である。 The tread hardness of the pneumatic tire is preferably 60 or more, more preferably 65 or more, and still more preferably 68 or more. By setting the hardness to 60 or more, the frictional force of the rubber due to the engagement between the tread surface and the road surface becomes high, and the wet grip performance can be improved. The tread hardness is preferably 75 or less, more preferably 72 or less, from the viewpoint of improving the durability to chipping and the like. The hardness of the tread rubber in the present invention is a hardness measured by a type A durometer (measurement temperature 25 ° C.) in accordance with JIS K6253-3: 2012.
トレッドとしては、前記特性を持つゴム組成物が挙げられ、例えば、ゴム成分、補強用充填剤などを含むトレッド用ゴム組成物を使用できる。 The tread includes a rubber composition having the above-mentioned characteristics, and, for example, a tread rubber composition containing a rubber component, a reinforcing filler and the like can be used.
ゴム成分としては、天然ゴム（ＮＲ）、エポキシ化天然ゴム（ＥＮＲ）、イソプレンゴム（ＩＲ）、スチレンブタジエンゴム（ＳＢＲ）、ブタジエンゴム（ＢＲ）、エチレン－プロピレン－ジエンゴム（ＥＰＤＭ）、ブチルゴム（ＩＩＲ）、ハロゲン化ブチルゴム（Ｘ－ＩＩＲ）、クロロプレンゴム（ＣＲ）、アクリルニトリル（ＮＢＲ）などが挙げられる。なかでも、ウェットグリップ性能の点では、ＳＢＲが好ましい。 As the rubber component, natural rubber (NR), epoxidized natural rubber (ENR), isoprene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR), ethylene-propylene-diene rubber (EPDM), butyl rubber (IIR And halogenated butyl rubber (X-IIR), chloroprene rubber (CR), acrylonitrile (NBR) and the like. Among them, SBR is preferable in terms of wet grip performance.
補強用充填剤は特に限定されないが、なかでも、カーボンブラック、シリカが好ましい。ここで、カーボンブラックの窒素吸着比表面積（Ｎ２ＳＡ）は、好ましくは７０～１４０ｍ２／ｇ、より好ましくは９０～１２０ｍ２／ｇである（ＪＩＳ　Ｋ　６２１７－２：２００１に準拠）。また、カーボンブラックの含有量は、ゴム成分１００質量部に対して、好ましくは２０～１００質量部、より好ましくは３５～６５質量部である。 The reinforcing filler is not particularly limited, but among them, carbon black and silica are preferable. Here, the nitrogen adsorption specific surface area (N 2 SA) of carbon black is preferably 70 to 140 m 2 / g, more preferably 90 to 120 m 2 / g (in accordance with JIS K 6217-2: 2001). The content of carbon black is preferably 20 to 100 parts by mass, more preferably 35 to 65 parts by mass, with respect to 100 parts by mass of the rubber component.
前記ゴム組成物には、前記水溶性化合物を配合してもよい。この場合、前記水溶性化合物の含有量は、優れたウェットグリップ性能が得られるという点から、ゴム成分１００質量部に対して、好ましくは０．１～１０質量部、より好ましくは０．５～２質量部である。 The water soluble compound may be blended in the rubber composition. In this case, the content of the water-soluble compound is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 10 parts by mass with respect to 100 parts by mass of the rubber component, in terms of obtaining excellent wet grip performance. 2 parts by mass.
前記ゴム組成物には、前記成分以外にも、ゴム組成物の製造に一般に使用される配合剤、例えば、酸化亜鉛、ステアリン酸、老化防止剤、オイルなどの軟化剤、ワックス、硫黄、加硫促進剤などを適宜配合できる。 In the rubber composition, besides the above components, compounding agents generally used in the production of rubber compositions, such as zinc oxide, stearic acid, antiaging agents, softeners such as oil, wax, sulfur, vulcanized An accelerator etc. can be mix | blended suitably.
前記ゴム組成物は、一般的な方法で製造される。すなわち、バンバリーミキサーやニーダー、オープンロールなどで前記各成分を混練りし、その後加硫する方法等により製造できる。 The rubber composition is manufactured by a general method. That is, it can manufacture by the method etc. which knead | mix the said each component with a Banbury mixer, a kneader, an open roll etc., and cure | cure after that.
本発明の空気入りタイヤは、上記ゴム組成物を用いて通常の方法によって製造される。すなわち、必要に応じて各種添加剤を配合したゴム組成物を、未加硫の段階でトレッドの形状に合わせて押し出し加工し、タイヤ成型機上にて通常の方法にて成形し、他のタイヤ部材とともに貼り合わせ、未加硫タイヤを形成する。この未加硫タイヤを加硫機中で加熱加圧して空気入りタイヤを製造できる。 The pneumatic tire of the present invention is manufactured by the usual method using the above rubber composition. That is, a rubber composition containing various additives according to need is extruded according to the shape of the tread at the unvulcanized stage, and molded by a usual method on a tire molding machine. It bonds together with a member and forms an unvulcanized tire. The unvulcanized tire can be heated and pressurized in a vulcanizer to produce a pneumatic tire.
本発明の空気入りタイヤは、乗用車用タイヤ、トラック・バス用タイヤ、スタッドレスタイヤなど、各種タイヤとして使用可能である。なかでも、ウェットグリップ性能に優れるため、ウェット路面用タイヤとして好適に使用できる。 The pneumatic tire of the present invention can be used as various tires such as tires for passenger cars, tires for trucks and buses, and studless tires. Among them, since it is excellent in wet grip performance, it can be suitably used as a wet road surface tire.
更に本発明の自動車走行方法は、前記空気入りタイヤを自動車に装着させるもので、装着した自動車を路面上に走行させた場合、路面とトレッド表面が噛み合ってゴムの摩擦力が増大することで、ウェットグリップ性能が顕著に改善される。 Further, according to the vehicle running method of the present invention, the pneumatic tire is mounted on a vehicle, and when the mounted vehicle is run on a road surface, the road surface and the tread surface are engaged to increase the frictional force of rubber. Wet grip performance is significantly improved.
実施例に基づいて、本発明を具体的に説明するが、本発明はこれらのみに限定されるものではない。 Although the present invention will be specifically described based on examples, the present invention is not limited to these.
以下、実施例及び比較例で使用した各種薬品について、まとめて説明する。
ＳＢＲ：ＪＳＲ（株）製の１５０２
カーボンブラック：三菱化学（株）社製のダイアブラックＩ
ステアリン酸：日油（株）製の椿
酸化亜鉛：三井金属鉱業（株）製の酸化亜鉛２種
老化防止剤：フレキシス社製のサントフレックス１３
ワックス：日本精蝋（株）製のオゾエース０３５５
硫黄：鶴見化学工業（株）製の粉末硫黄（２００メッシュ５％オイル入）
加硫促進剤：大内新興化学工業（株）のノクセラーＣＺ Hereinafter, various medicines used by an example and a comparative example are summarized and explained.
SBR: 1502 manufactured by JSR Corporation
Carbon black: Diablack I manufactured by Mitsubishi Chemical Corporation
Stearic acid: Zinc oxide manufactured by NOF Corporation: Zinc oxide manufactured by Mitsui Mining & Smelting Co., Ltd. Antioxidant: Santoflex 13 manufactured by Flexis
Wax: Ozo Ace 0355 manufactured by Nippon Seiwa Co., Ltd.
Sulfur: Powdered sulfur from Tsurumi Chemical Industry Co., Ltd. (200 mesh 5% oil included)
Vulcanization accelerator: Noccellar CZ of Ouchi Emerging Chemical Industry Co., Ltd.
（タイヤ製造）
表１に示す配合処方にしたがい、バンバリーミキサーを用いて、硫黄及び加硫促進剤以外の薬品を投入して、排出温度が約１５０℃となるよう５分間混練りした。得られた混練物に硫黄及び加硫促進剤を加え、オープンロールを用いて、約８０℃で３分間混練りし、未加硫ゴム組成物を得た。得られた未加硫ゴム組成物をトレッド形状に成形して、他のタイヤ部材と貼り合せ、１７０℃で１５分間加硫することにより、試験用タイヤを作製した。 (Tire manufacture)
According to the formulation shown in Table 1, chemicals other than sulfur and a vulcanization accelerator were added using a Banbury mixer, and kneading was performed for 5 minutes so that the discharge temperature was about 150 ° C. Sulfur and a vulcanization accelerator were added to the obtained kneaded product, and the mixture was kneaded for 3 minutes at about 80 ° C. using an open roll to obtain an unvulcanized rubber composition. The obtained unvulcanized rubber composition was molded into a tread shape, bonded to another tire member, and vulcanized at 170 ° C. for 15 minutes to produce a test tire.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
作製された試験用タイヤについて下記評価を行い、結果を表２、３に示した。 The following evaluations were performed on the manufactured test tires, and the results are shown in Tables 2 and 3.
＜ウェットグリップ性能＞
作製した試験用タイヤのトレッド表面をバフ加工することで、表２に記載のそれぞれ表面粗さＲｚｔｒを持つタイヤ１～７を作製した。また、上記タイヤ製造過程において、未加硫ゴム組成物混練過程で、乳鉢ですりつぶして粒径を１０μｍ程度に調整した塩化ナトリウムを、ゴム成分１００質量部に対して１０質量部練り込み、上記加硫工程後、水で表面を洗い流すことで、塩化ナトリウムを除去した表３に記載のタイヤ８を作製した。
なお、４水準のタイヤを作製した。作製したタイヤ１～８について、ＶＭＩ社製摩耗試験機ＬＡＴ－１００を用い、下記条件下で摩擦力試験を行った。３００ｍの距離を走行させ、そのときのｆｒｉｃｔｉｏｎ　ｆｏｒｃｅを平均し、荷重で割ることで摩擦係数μを算出した。μが大きいほど、ウェットグリップ性能が優れていることを示す。
路面：アスファルト
荷重：４０Ｎ
パウダー：２０％
速度：２０ｋｍ／ｈ及び４０ｋｍ／ｈ <Wet grip performance>
By buffing the tread surface of the produced test tire, tires 1 to 7 having surface roughness Rz tr described in Table 2 were produced. In the tire manufacturing process, 10 parts by mass of sodium chloride, which is ground in a mortar to adjust the particle size to about 10 μm, is kneaded with 100 parts by mass of the rubber component in the unvulcanized rubber composition kneading process. The tire 8 described in Table 3 from which sodium chloride was removed was produced by washing the surface with water after the vulcanization step.
In addition, four levels of tires were manufactured. The manufactured tires 1 to 8 were subjected to a friction force test under the following conditions using a wear tester LAT-100 manufactured by VMI. The friction force μ was calculated by running the distance of 300 m, averaging the friction force at that time, and dividing by the load. The larger μ is, the better the wet grip performance is.
Road surface: Asphalt load: 40 N
Powder: 20%
Speed: 20km / h and 40km / h
（表面粗さ）
タイヤ１～８のトレッド表面粗さＲｚｔｒ、路面の表面粗さＲｚｒｏは、キーエンス社製のレーザー顕微鏡ＶＫ９５００を用いて観察した。一方向にステージを移動し、更にその画像を連結することで、幅１．２８ｍｍ、長さ１０．１ｍｍの領域について高さ情報を得た。対物レンズは１０倍を用いた。それぞれのデータ点数は４３２点と３８６５点であった。そして、ＪＩＳ　Ｂ０６０１：２００１の附属書１（参考）に準拠し、十点平均粗さを測定した。 (Surface roughness)
The tread surface roughness Rz tr of the tires 1 to 8 and the surface roughness Rz ro of the road surface were observed using a laser microscope VK9500 manufactured by Keyence Corporation. By moving the stage in one direction and further connecting the images, height information was obtained for an area of width 1.28 mm and length 10.1 mm. The objective lens used 10 times. Each data score was 432 points and 3685 points. And ten-point average roughness was measured according to Annex 1 (reference) of JIS B0601: 2001.
＜トレッド硬度＞
タイヤ１～８のトレッドについて、ＪＩＳ　Ｋ６２５３－３：２０１２の「加硫ゴム及び熱可塑性ゴム－硬さの求め方－」に準拠し、タイプＡデュロメーターにより、２５℃の硬度を測定した。 <Tread hardness>
With respect to the treads of tires 1 to 8, according to JIS K6253-3: 2012 "Vulcanized rubber and thermoplastic rubber-determination of hardness-", the hardness at 25 ° C was measured by a type A durometer.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
表２より、Ｒｚｔｒ／Ｒｚｒｏが比較的１．０に近いタイヤ５～７は、摩擦係数が大きく、ウェットグリップ性能に優れていることが明らかとなった。 From Table 2, it is clear that the tires 5 to 7 having relatively relatively Rz tr / Rz ro of 1.0 have a large friction coefficient and excellent wet grip performance.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
また、表３より、表１と同じ配合ゴムに更に塩化ナトリウムを添加して作製したタイヤ８を、ウェット路面に適用した場合も、表面粗さを同様に調整すると、ウェットグリップ性能が顕著に改善された。 Further, from Table 3, even when the tire 8 manufactured by adding sodium chloride to the same compounded rubber as in Table 1 is applied to a wet road surface, the wet grip performance is remarkably improved if the surface roughness is similarly adjusted. It was done.

Claims (4)

  1. 路面の表面粗さＲｚｒｏに合わせてトレッド表面粗さＲｚｔｒを調整した空気入りタイヤ。 Pneumatic tire with tread surface roughness Rz tr adjusted to the surface roughness Rz ro of the road surface.
  2. ０．６≦Ｒｚｔｒ／Ｒｚｒｏ≦１．３に調整した請求項１記載の空気入りタイヤ。 The pneumatic tire according to claim 1 adjusted to 0.6 ≦ Rz tr / Rz ro ≦ 1.3.
  3. Ｒｚｔｒが７～１０μｍである請求項１又は２記載の空気入りタイヤ。 The pneumatic tire according to claim 1 or 2, wherein Rz tr is 7 to 10 μm.
  4. 請求項１～３のいずれかに記載の空気入りタイヤを自動車に装着させる自動車走行方法。 A method of driving a vehicle by attaching the pneumatic tire according to any one of claims 1 to 3 to a vehicle.
PCT/JP2014/052643 2013-02-27 2014-02-05 Pneumatic tire, and automobile travel method WO2014132761A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001130220A (en) * 1999-11-05 2001-05-15 Sumitomo Rubber Ind Ltd Studless tire
JP2003192844A (en) * 2001-12-27 2003-07-09 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2010155941A (en) * 2008-12-29 2010-07-15 Sumitomo Rubber Ind Ltd Rubber composition and tire using the same
JP2012036268A (en) * 2010-08-05 2012-02-23 Yokohama Rubber Co Ltd:The Rubber composition and pneumatic tire using the same
JP2012135829A (en) * 2010-12-27 2012-07-19 Onodani Kiko Kk Outer peripheral face grinding apparatus for vehicle tire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2506755Y2 (en) * 1990-01-18 1996-08-14 トヨタ自動車株式会社 Asphalt pavement with low μ road surface
JPH10237226A (en) * 1997-02-24 1998-09-08 Yokohama Rubber Co Ltd:The Rubber composition and pneumatic tire produced therefrom
FR2955328B1 (en) * 2010-01-18 2013-03-08 Michelin Soc Tech RUBBER COMPOSITION FOR WINTER PNEUMATIC BEARING BAND

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001130220A (en) * 1999-11-05 2001-05-15 Sumitomo Rubber Ind Ltd Studless tire
JP2003192844A (en) * 2001-12-27 2003-07-09 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2010155941A (en) * 2008-12-29 2010-07-15 Sumitomo Rubber Ind Ltd Rubber composition and tire using the same
JP2012036268A (en) * 2010-08-05 2012-02-23 Yokohama Rubber Co Ltd:The Rubber composition and pneumatic tire using the same
JP2012135829A (en) * 2010-12-27 2012-07-19 Onodani Kiko Kk Outer peripheral face grinding apparatus for vehicle tire

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