JP3286405B2 - Tire tread - Google Patents
Tire treadInfo
- Publication number
- JP3286405B2 JP3286405B2 JP18277593A JP18277593A JP3286405B2 JP 3286405 B2 JP3286405 B2 JP 3286405B2 JP 18277593 A JP18277593 A JP 18277593A JP 18277593 A JP18277593 A JP 18277593A JP 3286405 B2 JP3286405 B2 JP 3286405B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tread
- hardness
- tire tread
- tire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Tires In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、タイヤトレッドに関す
る。さらに詳しくは、柱状の高硬度ゴムが接地面に垂直
に埋設されており、グリップ性能の優れたタイヤトレッ
ドに関する。The present invention relates to a tire tread. More specifically, the present invention relates to a tire tread excellent in grip performance in which a columnar high-hardness rubber is embedded vertically in a ground contact surface.
【０００２】[0002]
【従来の技術】近年、スパイクタイヤによる粉塵公害対
策としてスパイクタイヤ禁止が打ち出され、スタッドレ
スタイヤが開発され普及するなど市場は大きく変わって
きた。かかるスタッドレスタイヤにおいては、一般に、
スパイクなしに氷雪路上でのグリップをうるために、粘
着摩擦力を上げる努力がなされている。つまり、材質の
点からは、柔らかく、低温になっても硬化しない発泡ゴ
ムなどの素材を用いるとともに、素材に短繊維を含有さ
せてトレッド表面の凹凸を増やすことにより排水効果を
高めることに主眼がおかれ、氷雪面との接触面積を増や
すことで粘着摩擦力を向上させる努力がはらわれてい
る。また、形状の点からは、トレッドパターンに排水性
のよい深い溝を設けたうえに、可能な限りのサイピング
を設け、エッジによる水切りによって粘着摩擦力の効果
を高めさせるとともに、エッジによるひっかき効果によ
ってひっかき摩擦力を高める努力がなされている。この
ようにして、スパイクタイヤの性能に近いタイヤトレッ
ドが開発されてきた。2. Description of the Related Art In recent years, spike tires have been banned as a measure against dust pollution caused by spike tires, and the market has changed drastically, as studless tires have been developed and spread. In such studless tires, generally,
Efforts have been made to increase the adhesive friction in order to achieve grip on ice and snow without spikes. In other words, in terms of material, the main focus is to use a material such as foamed rubber that is soft and does not cure even at low temperatures, and to enhance the drainage effect by increasing the unevenness of the tread surface by including short fibers in the material. After all, efforts have been made to increase the adhesive friction by increasing the contact area with the ice and snow surface. In addition, from the point of shape, in addition to providing deep grooves with good drainage in the tread pattern, providing as much siping as possible, draining by the edge to increase the effect of adhesive friction force, and by scratching effect by the edge Efforts have been made to increase the scratching force. In this way, tire treads that are close to the performance of spiked tires have been developed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述の
ような観点からこれまで改善されてきたタイヤトレッド
では、路面の状態によってはスパイクタイヤに劣るばあ
いもある。また、物理的に粘着摩擦力には限界があり、
ひっかき効果による摩擦力の向上に期するところが大き
くなっている。However, the tire tread which has been improved from the above-mentioned point of view may be inferior to the spike tire depending on the condition of the road surface. In addition, there is a limit in the adhesive friction force physically,
The potential for improving the frictional force due to the scratching effect is increasing.
【０００４】本発明は、叙上の事情に鑑み、粉塵公害を
なくし氷雪面上でのグリップが大きいタイヤトレッドを
提供することを目的とする。SUMMARY OF THE INVENTION In view of the circumstances described above, an object of the present invention is to provide a tire tread which eliminates dust pollution and has a large grip on ice and snow surfaces.
【０００５】[0005]
【課題を解決するための発明】本発明のタイヤトレッド
は、０℃で測定したＪＩＳ Ａ硬度が９０以上である多
数の柱状の高硬度ゴムが母体トレッドゴム内において接
地面に垂直に埋設されており、該高硬度ゴムの埋設長さ
が、トレッドパターンの溝深さの２／３以上で、該高硬
度ゴムの埋設部先端から前記母体トレッドゴム内に設け
られるベルトまでのゴム厚さが１ｍｍ以上であることを
特徴としている。The tire tread of the present invention has a large number of columnar high hardness rubbers having a JIS A hardness of 90 or more measured at 0 ° C. embedded vertically in the base tread rubber in the ground contact surface. And the embedded length of the high hardness rubber
Is not less than 2/3 of the groove depth of the tread pattern,
Provided in the base tread rubber from the tip of the embedded rubber part
Rubber thickness of up belt is characterized by der Rukoto than 1mm to be.
【０００６】そして、母体トレッドゴムのゴム埋設用の
穴に加硫後の０℃で測定したＪＩＳＡ硬度が９０以上で
ある高硬度ゴムの未加硫ゴムを埋設し、加硫により当該
穴に前記高硬度ゴムを接着させてなることが好ましい。[0006] Then, an unvulcanized rubber of high hardness rubber having a JISA hardness of 90 or more measured at 0 ° C after vulcanization is embedded in a hole for embedding rubber of the base tread rubber, and the hole is vulcanized. It is preferable that a high hardness rubber is adhered.
【０００７】また、前記母体トレッドゴムが、天然ゴ
ム、ポリイソプレンまたはポリブタジエンを主体とする
ゴム組成物からなることが好ましく、前記母体トレッド
ゴムの２０℃で測定したＪＩＳ Ａ硬度が５０〜６８で
あることが好ましい。The base tread rubber preferably comprises a rubber composition mainly composed of natural rubber, polyisoprene or polybutadiene, and the base tread rubber has a JIS A hardness of 50 to 68 measured at 20 ° C. Is preferred.
【０００８】さらに、前記母体トレッドゴムの２０℃で
測定したＪＩＳ Ａ硬度が、乗用車用タイヤで５３〜５
８、大型車用タイヤで５８〜６４であることが好まし
い。Further, the JIS A hardness of the base tread rubber measured at 20 ° C. is 53 to 5 for passenger car tires.
8. It is preferably 58 to 64 for tires for large vehicles.
【０００９】また、埋設穴に埋設させた高硬度ゴム部の
総面積がトレッドのパターンブロックの面積の５〜３０
％であることが好ましい。The total area of the high-hardness rubber portion buried in the burying hole is 5 to 30 times the area of the tread pattern block.
%.
【００１０】[0010]
【作用】本発明のタイヤトレッドでは、タイヤの接地面
に垂直に多数の柱状の高硬度ゴムが埋設され、ひっかき
効果を高めたことにより氷雪面上でのグリップが大きく
なる。In the tire tread of the present invention, a large number of pillar-shaped high-hardness rubbers are buried perpendicular to the ground contact surface of the tire, and the grip on the ice and snow surface is increased by enhancing the scratching effect.
【００１１】[0011]
【実施例】以下、添付図面を参照しつつ本発明のタイヤ
トレッドを説明する。なお本明細書におけるＪＩＳ Ａ
硬度とは、ＪＩＳＡ形硬度計を用いて測定した硬度をい
う。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tire tread according to the present invention will be described with reference to the accompanying drawings. JIS A in this specification
Hardness refers to hardness measured using a JISA type hardness meter.
【００１２】図１は本発明のタイヤトレッドの一実施例
の断面図である。図１において、１は柱状の高硬度ゴム
であり、母体となる通常のタイヤトレッドの表面に埋設
される。この高硬度ゴム１はスパイクピンと機能的に類
似しており、スパイクピンと同様にひっかき摩擦力を向
上させる効果を奏しうる。FIG. 1 is a sectional view of an embodiment of the tire tread of the present invention. In FIG. 1, reference numeral 1 denotes a columnar high-hardness rubber, which is embedded in the surface of a normal tire tread serving as a base. The high hardness rubber 1 is functionally similar to the spike pin, and can exert an effect of improving a scratching friction force similarly to the spike pin.
【００１３】高硬度ゴム１は、タイヤトレッドの接地面
に対してあらかじめ垂直に設けられた穴に未加硫のもの
を埋設し、通常の方法により加硫することによって前記
穴内に接着される。The high-hardness rubber 1 is bonded to the tire tread by embedding an unvulcanized rubber in a hole provided perpendicularly to the ground surface of the tire tread and vulcanizing the rubber in a usual manner.
【００１４】たとえば高硬度ゴム１を母体トレッドゴム
の埋設穴に接着させるには、未加硫の高硬度ゴム材料を
埋設穴に埋設し、加圧オーブンにて加熱し、加硫を行な
うことによってなされる。このような高硬度ゴム材料と
しては、加硫後の硬度が０℃で測定したＪＩＳ Ａ硬度
９０以上の高硬度になるものが用いられる。For example, in order to bond the high hardness rubber 1 to the burial hole of the base tread rubber, an unvulcanized high hardness rubber material is buried in the burial hole, heated in a pressure oven, and vulcanized. Done. As such a high hardness rubber material, a material having a hardness after vulcanization of 90 or more JIS A hardness measured at 0 ° C. is used.
【００１５】また、図１に示される高硬度ゴム１の埋設
長さＬは、少なくともトレッドパターンの溝深さＭの２
／３以上で、高硬度ゴム１の埋設部先端１ｂからベルト
３までのゴムの厚さＮは１ｍｍ以上あることが好まし
い。The buried length L of the high hardness rubber 1 shown in FIG. 1 is at least two times the groove depth M of the tread pattern.
It is preferable that the thickness N of the rubber from the tip 1b of the high hardness rubber 1 to the belt 3 be 1 mm or more.
【００１６】つまり、高硬度ゴム１の埋設長さＬが、溝
深さＭの２／３より短いと高硬度ゴム１は母体トレッド
ゴム２と同一の動きをするようになり、頭部１ａの露出
が少なくなってひっかき摩擦力を高める効果は極端に小
さくなる。また、高硬度ゴム１の埋設長さＬが長くなり
ベルト３に近づきすぎると、接地時の圧縮により高硬度
ゴム１の埋設部先端１ｂとベルト３のあいだの母体トレ
ッドゴム２が破壊されやすくなりタイヤの寿命を極端に
短くする。That is, when the buried length L of the high hardness rubber 1 is shorter than 2/3 of the groove depth M, the high hardness rubber 1 moves in the same manner as the base tread rubber 2, and the head 1a The effect of increasing the scratching force due to less exposure becomes extremely small. If the buried length L of the high-hardness rubber 1 is too long to approach the belt 3, the base tread rubber 2 between the front end 1b of the high-hardness rubber 1 and the belt 3 is likely to be broken due to compression at the time of contact with the ground. Extremely short tire life.
【００１７】また、柱状の高硬度ゴム１の断面形状は本
発明においてとくに限定されず、円形や多角形などを採
用することができるが、六角形などできるだけエッジの
たくさんある形状の方がひっかき効果が大きくなるので
好ましい。The cross-sectional shape of the columnar high-hardness rubber 1 is not particularly limited in the present invention, and a circular or polygonal shape can be adopted. However, a shape having as many edges as possible, such as a hexagon, is more effective for scratching. Is preferred.
【００１８】母体タイヤトレッド２は、高硬度ゴム１に
比べて柔らかく、接地時に圧縮する。しかし、柱状の高
硬度ゴム１は圧縮変形をほとんどせず、その頭部１ａが
露出し、路面を覆う氷を引っかき、摩擦力を高めること
ができる。The mother tire tread 2 is softer than the high-hardness rubber 1 and is compressed at the time of contact with the ground. However, the columnar high-hardness rubber 1 hardly undergoes compressive deformation, and its head 1a is exposed, so that the ice covering the road surface can be scratched and the frictional force can be increased.
【００１９】このような母体タイヤトレッド２を構成す
るポリマーは、通常トレッドに用いられる汎用ポリマー
全て使用することができるが、低温時の硬度上昇を抑え
るという観点から、天然ゴム、ポリイソプレンおよびポ
リブタジエンなどがとくに好ましい。As the polymer constituting such a base tire tread 2, all general-purpose polymers usually used for treads can be used, but from the viewpoint of suppressing an increase in hardness at low temperatures, natural rubber, polyisoprene, polybutadiene and the like can be used. Is particularly preferred.
【００２０】しかし、高硬度ゴム１はアスファルト、コ
ンクリートなどの路面を傷付けるようなものでは本発明
の目的に反するので好ましくなく、かつ、母体タイヤト
レッドより柔らかいものであれば本発明の効果を奏しえ
ない。そこで、路面を傷付けずに氷のみを引っかいてグ
リップする程度の硬さのものが好ましい。そのようなも
のの具体例として、たとえば、エボナイト、高レジン配
合のゴムなどをあげることができ、また路面が凍結する
ような低温で所定の硬度になる高いガラス転移温度（１
０℃以上）のＳＢＲ配合のゴムも適している。However, the high-hardness rubber 1 is not preferable if it damages the road surface such as asphalt or concrete, because it is contrary to the object of the present invention, and if it is softer than the mother tire tread, the effect of the present invention can be obtained. Absent. Therefore, it is preferable to use a material having such a hardness that only the ice can be scratched and gripped without damaging the road surface. Specific examples of such a material include ebonite, rubber with a high resin blend, and a high glass transition temperature (1) that has a predetermined hardness at a low temperature at which the road surface freezes.
(0 ° C. or higher) SBR compound rubber is also suitable.
【００２１】また、母体タイヤトレッドの埋設穴の面積
の比率はパターンブロックの５〜３０％で、好ましくは
７〜１５％である。したがって、この埋設穴に埋設させ
た高硬度ゴム１の頭部１ａが露出する面積は、パターン
ブロック総面積の５〜３０％となり、さらには７〜１５
％となることが好ましい。つまり、高硬度ゴムの占める
面積が５％未満ではスパイク効果が不足し、３０％以上
では母体トレッドゴム２の粘着摩擦効果を減じさせ、か
つ、機械的強度を低下させるので好ましくない。The ratio of the area of the buried holes of the mother tire tread is 5 to 30% of the pattern block, preferably 7 to 15%. Therefore, the area where the head 1a of the high hardness rubber 1 buried in the burying hole is exposed is 5 to 30% of the total area of the pattern block, and is further 7 to 15%.
% Is preferable. That is, when the area occupied by the high hardness rubber is less than 5%, the spike effect is insufficient, and when it is 30% or more, the adhesive friction effect of the mother tread rubber 2 is reduced and the mechanical strength is undesirably reduced.
【００２２】つぎに本発明を実施例に基いてさらに詳細
に説明するが、本発明はもとよりかかる実施例にのみ限
定されるものではない。Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【００２３】実施例１〜５および比較例１ １８５／７０Ｒ１４のスタッドレスタイヤのパターンブ
ロック部の半数（１８０か所）に直径４ｍｍの円筒状の
ゴム埋設用の穴をもつタイヤを作製した。Examples 1 to 5 and Comparative Example 1 A tire having a cylindrical rubber embedding hole having a diameter of 4 mm was formed in half (180 places) of the pattern block portion of the studless tire of 185 / 70R14.
【００２４】表１に示す成分を有する母体トレッドゴム
（製造例ａ〜ｄ）に、表２に示す成分を有する高硬度ゴ
ム（製造例Ａ〜Ｃ）を、表３に示す組み合わせで実施例
１〜５および比較例１を製造し、以下の方法にしたがっ
てタイヤ氷上テストを行なった。そのテスト結果を表４
に示す。A high hardness rubber (Production Examples A to C) having the components shown in Table 2 was combined with a base tread rubber (Production Examples a to d) having the components shown in Table 1 in a combination shown in Table 3 in Example 1. To 5 and Comparative Example 1 were manufactured and subjected to a test on a tire ice according to the following method. Table 4 shows the test results.
Shown in
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】[0027]
【表３】 [Table 3]
【００２８】[0028]
【表４】 [Table 4]
【００２９】（タイヤ氷上テスト） 試験場所 ：北海道名寄圧雪氷結路面テストコース 気温 ：−５℃ テスト車輌：ＦＦ１５００ｃｃ 国産乗用車 空気圧 ：１．９ｋｇｆ／ｃｍ2 加速 ：停止状態から加速し、５０ｍ走行するのに
要する時間 制動 ：時速３０ｋｍ／ｈで走行時に停止させるま
でに要した距離 同じ組成からなる高硬度ゴム（製造例Ｃ）を、母体トレ
ッドゴム（製造例ａ〜ｄ）に装着した実施例１〜４のテ
スト結果を表４より比較すると、母体トレッドゴムが２
０℃で測定したＪＩＳ Ａ硬度５０より柔らかい母体ト
レッドゴム（製造例ａ）に高硬度ゴムを装着した実施例
１では、パターンブロックの剛性が低下し、駆動、制動
により高硬度ゴムが倒れ込み、路面をひっかく効果が減
少するということができる。(Tire on ice test) Test place: Hokkaido Narayatsu snow and ice road surface test course Temperature: -5 ° C Test vehicle: FF 1500 cc Domestic passenger car Air pressure: 1.9 kgf / cm 2 Acceleration: Accelerate from a stopped state and run 50 m Time required Braking: distance required to stop when traveling at a speed of 30 km / h. Examples 1 to 4 in which high hardness rubber (Production Example C) having the same composition was attached to base tread rubber (Production Examples a to d). Comparison of the test results from Table 4 shows that the mother tread rubber was 2
In Example 1 in which a high-hardness rubber was attached to a base tread rubber (manufacturing example a) softer than JIS A hardness 50 measured at 0 ° C., the rigidity of the pattern block was reduced, and the high-hardness rubber fell down by driving and braking, and It can be said that the effect is reduced.
【００３０】また、とくに大型タイヤのばあいは、乗用
車タイヤに比べタイヤにかかる駆動力および制動力が大
きいので母体トレッドゴムの硬度は高い方が好ましい。
しかし、本走行テストでは示されていないが、母体トレ
ッドゴムの２０℃で測定したＪＩＳ Ａ硬度が６８以上
になると粘着摩擦力が低下するので好ましくない。In particular, in the case of large tires, the driving force and the braking force applied to the tires are larger than those of passenger tires, so that the hardness of the mother tread rubber is preferably higher.
However, although not shown in the present running test, it is not preferable that the JIS A hardness of the mother tread rubber measured at 20 ° C. becomes 68 or more, because the adhesive frictional force decreases.
【００３１】以上より、母体トレッドゴムの２０℃で測
定したＪＩＳ Ａ硬度が５０〜６８であることが好まし
い。さらには、乗用車用タイヤで５３〜５８、大型車用
タイヤで５８〜６４であることが好ましい。As described above, the JIS A hardness of the mother tread rubber measured at 20 ° C. is preferably 50 to 68. Further, it is preferably 53 to 58 for tires for passenger cars and 58 to 64 for tires for large vehicles.
【００３２】また、前述の実施例で良好な加速および制
動状態を示した実施例２に用いられた母体トレッドゴム
（製造例ｂ）において、異なる高硬度ゴム（製造例Ａお
よびＢ）を装着したものが、実施例５および比較例１で
あるが、これと実施例２を比較すると実施例２の方が良
好な状態を示し、実施例２に用いられた高硬度ゴム（製
造例Ｃ）が優れていることがわかる。Further, different high hardness rubbers (manufacturing examples A and B) were used in the mother tread rubber (manufacturing example b) used in the embodiment 2 which showed good acceleration and braking conditions in the above-described embodiment. These are Example 5 and Comparative Example 1. When this is compared with Example 2, Example 2 shows a better state, and the high hardness rubber (Production Example C) used in Example 2 is It turns out that it is excellent.
【００３３】以上より、表２に示される配合の高硬度ゴ
ム（製造例Ｃ）のように、エボナイト様のものが好まし
いが、この高硬度ゴムは乾燥した路面では脆いばあいが
あるので、軟質ゴム、とくに低温で硬くなる高ガラス転
移の軟質ゴム粉を添加して弾性を付与するのも好まし
い。From the above, it is preferable to use an ebonite-like rubber like the high-hardness rubber (Production Example C) having the composition shown in Table 2, but since the high-hardness rubber is brittle on a dry road surface, it is soft. It is also preferable to add rubber, especially soft rubber powder having a high glass transition which hardens at a low temperature to impart elasticity.
【００３４】さらに、母体トレッドゴムには排水による
粘着摩擦の向上、ひっかき摩擦の向上のために有機短繊
維の混入、発泡などにより表面の凹凸を増やすことも有
効である。It is also effective to increase the unevenness of the surface of the mother tread rubber by mixing and foaming organic short fibers to improve the adhesive friction due to drainage and the scratch friction.
【００３５】[0035]
【発明の効果】以上説明したとおり、本発明のタイヤト
レッドは、タイヤの接地面に垂直に多数の柱状の高硬度
ゴムが埋設されたことにより、高硬度ゴムで氷をひっか
いてグリップ性能を高めることができる。このように氷
雪面上での安全走行が確保されるとともに、高硬度ゴム
はアスファルトのような路面を傷付けたりすることはな
いので粉塵公害を防ぐことができる。As described above, in the tire tread of the present invention, a large number of pillar-shaped high-hardness rubbers are buried perpendicularly to the ground contact surface of the tire, so that the high-hardness rubber scratches ice to improve grip performance. be able to. As described above, safe driving on the ice and snow surface is ensured, and the high hardness rubber does not damage the road surface such as asphalt, so that dust pollution can be prevented.
【図１】本発明のタイヤトレッドの一実施例を示す断面
図である。FIG. 1 is a sectional view showing one embodiment of a tire tread of the present invention.
１ 高硬度ゴム ２ 母体トレッドゴム 1 High hardness rubber 2 Base tread rubber
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−172803（ＪＰ，Ａ) 特開 平１−257607（ＪＰ，Ａ) 特開 平３−54006（ＪＰ，Ａ) 特開 平５−238213（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60C 11/00 - 11/24 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-172803 (JP, A) JP-A-1-257607 (JP, A) JP-A-3-54006 (JP, A) JP-A-5-172 238213 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) B60C 11/00-11/24
Claims (6)
上である多数の柱状の高硬度ゴムが母体トレッドゴム内
において接地面に垂直に埋設されており、該高硬度ゴム
の埋設長さが、トレッドパターンの溝深さの２／３以上
で、該高硬度ゴムの埋設部先端から前記母体トレッドゴ
ム内に設けられるベルトまでのゴム厚さが１ｍｍ以上で
あることを特徴とするタイヤトレッド。1. A are embedded perpendicularly to the ground plane number of the hard rubber of columnar JIS A hardness measured is 90 or higher in maternal inner tread rubber at 0 ° C., the high hardness rubber
Buried length is more than 2/3 of the groove depth of tread pattern
Then, from the tip of the embedded portion of the high hardness rubber,
If the rubber thickness up to the belt provided in the
Tire tread characterized by Rukoto Oh.
硫後の０℃で測定したＪＩＳ Ａ硬度が９０以上である
高硬度ゴムの未加硫ゴムを埋設し、加硫により当該穴に
前記高硬度ゴムを接着させてなる請求項１記載のタイヤ
トレッド。2. An unvulcanized rubber of high hardness rubber having a JIS A hardness of 90 or more measured at 0 ° C. after vulcanization is embedded in a hole for embedding rubber of a base tread rubber and vulcanized. The tire tread according to claim 1, wherein the high hardness rubber is bonded.
リイソプレンまたはポリブタジエンを主体とするゴム組
成物からなる請求項１または２記載のタイヤトレッド。3. The tire tread according to claim 1, wherein the mother tread comb is made of a rubber composition mainly composed of natural rubber, polyisoprene or polybutadiene.
たＪＩＳ Ａ硬度が５０〜６８である請求項１、２また
は３記載のタイヤトレッド。4. The tire tread according to claim 1, wherein the mother tread rubber has a JIS A hardness measured at 20 ° C. of 50 to 68.
たＪＩＳ Ａ硬度が、乗用車用タイヤで５３〜５８、大
型車用タイヤで５８〜６４である請求項１、２または３
記載のタイヤトレッド。5. The JIS A hardness of the mother tread rubber measured at 20 ° C. is 53 to 58 for passenger car tires and 58 to 64 for large vehicle tires.
The described tire tread.
出面の総面積がトレッドのパターンブロックの面積の５
〜３０％である請求項１、２、３、４または５記載のタ
イヤトレッド。The total area of the head exposed <br/> out surface of 6. The hard rubber which is embedded in the embedding hole of the area of the pattern block of the tread 5
The tire tread according to any one of claims 1, 2, 3, 4, and 5, wherein the tire tread is about 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18277593A JP3286405B2 (en) | 1993-07-23 | 1993-07-23 | Tire tread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18277593A JP3286405B2 (en) | 1993-07-23 | 1993-07-23 | Tire tread |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0732817A JPH0732817A (en) | 1995-02-03 |
| JP3286405B2 true JP3286405B2 (en) | 2002-05-27 |
Family
ID=16124206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18277593A Expired - Fee Related JP3286405B2 (en) | 1993-07-23 | 1993-07-23 | Tire tread |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3286405B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006076529A (en) * | 2004-09-13 | 2006-03-23 | Bridgestone Corp | Pneumatic tire and method of manufacturing the same |
| KR100755381B1 (en) * | 2006-07-06 | 2007-09-04 | 금호타이어 주식회사 | Tire with improved straight drive performance |
| JP5457484B2 (en) * | 2012-02-27 | 2014-04-02 | 住友ゴム工業株式会社 | Heavy duty pneumatic tire |
| KR20150048255A (en) * | 2013-10-23 | 2015-05-07 | 한국타이어 주식회사 | Tread block structure of a pneumatic tire |
| CN112368158B (en) * | 2018-06-25 | 2022-09-06 | 米其林集团总公司 | Pneumatic tire with optimized crown and tread pattern structure |
| KR102185593B1 (en) * | 2019-04-16 | 2020-12-03 | 한국타이어앤테크놀로지 주식회사 | Tread block for heavy duty tire |
| US20210339574A1 (en) * | 2020-05-01 | 2021-11-04 | Jinwoo Jang | Tire tread wear indicators and tires including same |
-
1993
- 1993-07-23 JP JP18277593A patent/JP3286405B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0732817A (en) | 1995-02-03 |
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