JPH02249707A - Pneumatic tire - Google Patents

Pneumatic tire

Info

Publication number
JPH02249707A
JPH02249707A JP1070039A JP7003989A JPH02249707A JP H02249707 A JPH02249707 A JP H02249707A JP 1070039 A JP1070039 A JP 1070039A JP 7003989 A JP7003989 A JP 7003989A JP H02249707 A JPH02249707 A JP H02249707A
Authority
JP
Japan
Prior art keywords
tread
rubber composition
pneumatic tire
rubber
rubber composite
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.)
Pending
Application number
JP1070039A
Other languages
Japanese (ja)
Inventor
Masayuki Ohashi
大橋　昌行
Yasumi Kawaguchi
川口　保美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP1070039A priority Critical patent/JPH02249707A/en
Publication of JPH02249707A publication Critical patent/JPH02249707A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B60C11/03—Tread patterns
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
    • B60C11/1346—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls covered by a rubber different from the tread rubber

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

PURPOSE:To improve resistance to partial wear along with resistance to normal wear by arranging each different rubber composite on the central part and the peripheral part of each block, etc., formed on the tread part, and setting the thickness and dynamic modulus of elasticity, etc., at room temperature of these rubber composites in specified ranges respectively. CONSTITUTION:With a pneumatic tire, main grooves are cut in a tread to divide the tread and form plural blocks 1, etc., on the tread part. In this case, a rubber composite part which differs from that of the central part 2 is applied to the peripheral part 3 of each block 1, etc., with the thickness of 0.3-10mm. At room temperature, dynamic modulus of elasticity of the rubber composite on the central part 2 is set at 60-140kgf/cm<2>, and dynamic modulus of elasticity of the rubber composite on the peripheral part 3 is set at 110-190kgf/cm<2>. Further, a value obtained by subtracting the dynamic modulus of elasticity of the rubber composite on the central part 2 from the dynamic modulus of elasticity of the rubber composite on the peripheral part 3 is set to 10-90kgf/cm<2>.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、耐偏摩耗性と耐摩耗性を同時に改良した空気
入りタイヤに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pneumatic tire with improved uneven wear resistance and abrasion resistance at the same time.

（従来の技術） タイヤトレッドの路面に接する部分は、一般に一種類の
ゴムで構成されている。しかし、接地面内に作用する力
の分布、トレッドブロックの動きの分布、スリップ率の
分布によって摩耗の程度に差が表われ、トレッドの接地
面が不均一に摩耗し、いわゆる偏摩耗現象が発生してタ
イヤの寿命、外観等において好ましくなかった。(Prior Art) The portion of a tire tread that comes into contact with the road surface is generally made of one type of rubber. However, differences in the degree of wear appear depending on the distribution of forces acting on the tread surface, the distribution of tread block movement, and the distribution of the slip rate, causing the tread surface to wear unevenly, resulting in the so-called uneven wear phenomenon. This was unfavorable in terms of tire life, appearance, etc.

従来、このような偏摩耗に対しては、例えば特開昭５１
−１００５０４号公報にあるようなトレッド肩部に耐摩
耗性の高いゴムを配置する方法、あるいは特開昭５３−
８０６０２号公報にあるような、トレッドの接地面に設
けられた溝周囲にブロック幅の１７４乃至１／３に該当
する厚さを有する、トレッドゴムより耐摩耗性の高いゴ
ムを配置する方法が用いられてきた。Conventionally, for such uneven wear, for example, Japanese Patent Application Laid-Open No. 51
- A method of arranging highly wear-resistant rubber on the tread shoulder as disclosed in Japanese Patent Publication No. 100504, or JP-A-53-
A method as described in Japanese Patent No. 80602 is used in which rubber, which has a thickness corresponding to 174 to 1/3 of the block width and has higher wear resistance than tread rubber, is arranged around the groove provided on the ground contact surface of the tread. I've been exposed to it.

（発明が解決しようとする課題） これらの方法によると確かに耐偏摩耗性の改良には効果
があった。しかし、これらのタイヤの寿命は耐摩耗性の
劣るトレッド中央部のゴム質に依存することになり、耐
偏摩耗性は改良できたが、耐摩耗性そのもののレベルは
十分ではなかった。(Problems to be Solved by the Invention) These methods were certainly effective in improving uneven wear resistance. However, the lifespan of these tires depends on the rubber quality in the center of the tread, which has poor wear resistance, and although uneven wear resistance has been improved, the level of wear resistance itself is not sufficient.

そこで、本発明の目的は、従来改善し得なかった耐偏摩
耗性と耐摩耗性とを同時に改善した空気入りタイヤを提
供することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pneumatic tire that simultaneously improves uneven wear resistance and abrasion resistance, which could not be improved conventionally.

（課題を解決するための手段） 上記目的を達成するために、本発明の、踏面に、切込ん
だ主溝によって踏面を区分して複数のブロックまたはリ
ブを形成したトレッド部を有する空気入りタイヤは、前
記ブロックまたはリブの周囲部にこれらの中央部と異な
るゴム組成物を厚さ０．３〜１０ｍｍで配置し、室温に
おいて、中央部のゴム組成物の動的弾性率Ｅ’（１）が
６０〜１４０ｋｇｆ／ｃｉ２でかつ周囲部のゴム組成物
の動的弾性率Ｅ’（２）が１１０〜１９０ｋｇｆ／ｃｍ
”であり、上記Ｅ’（２）の値から上記Ｅ’（１）の値
を引いた値が１０〜９０ｋｇｆ　／　ｃｍ　”の範囲内
にあることを特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pneumatic tire having a tread portion in which a plurality of blocks or ribs are formed by dividing the tread surface by main grooves cut into the tread surface. A rubber composition different from that of the central portion is placed around the block or rib to a thickness of 0.3 to 10 mm, and at room temperature, the dynamic elastic modulus E'(1) of the rubber composition of the central portion is is 60 to 140 kgf/ci2, and the dynamic elastic modulus E'(2) of the rubber composition in the surrounding area is 110 to 190 kgf/cm.
", and the value obtained by subtracting the value of E'(1) from the value of E'(2) is within the range of 10 to 90 kgf/cm".

本発明においては、好ましくは上記トレッドの両肩部の
エッヂより３〜２０ｍｍの範囲内を、ブロックまたはリ
ブの周囲部を構成する上記ゴム組成物と同じゴム組成物
とする。In the present invention, preferably the same rubber composition as that constituting the surrounding area of the blocks or ribs is used within a range of 3 to 20 mm from the edges of both shoulders of the tread.

また本発明においては、ブロックまたはリブの周方向の
側面のみに上記周囲部のゴム組成物を配置してもよい。Further, in the present invention, the rubber composition for the peripheral portion may be placed only on the circumferential side surfaces of the block or rib.

更に本発明においては、前記空気入りタイヤにおいて、
周囲部のゴム組成物を初期主溝深さの少くとも１／２の
高さの所から出現させ、かつトレッド表面も該周囲部の
ゴム組成物で被覆することができる。Furthermore, in the present invention, in the pneumatic tire,
The rubber composition of the peripheral part can be made to appear from a height of at least 1/2 of the initial main groove depth, and the tread surface can also be covered with the rubber composition of the peripheral part.

（作　用） 空気入りタイヤのショルダー、リブ、ブロック等のエッ
ヂを核として発生する偏摩耗は、接地面内の例えばブロ
ックにおいて、その中央部に比べ周囲部の方が動き量、
スリップ率共に大きく、摩耗が速く進展することにより
起こることが知られている。従って、本発明においては
、第１〜３図に示す構造としてブロックまたはリブ１の
周囲部３に中央部２よりも高い弾性率を持つゴムを配し
、ブロックまたはリブの動き、スリップ率を全体的に均
一化することにより、耐偏摩耗性の改良を図ることとし
た。また、耐摩耗性に重要な中央部２のゴム組成物は、
動的弾性率を所定の範囲内に設定しさえすれば他の物性
を自由にコントロールできるので、同時に耐摩耗性を上
げるべく調整することが十分可能である。このようにし
て、耐偏摩耗性と耐摩耗性とを同時に改善した空気入り
タイヤを得ることが可能である。(Function) Uneven wear that occurs mainly at the edges of the shoulders, ribs, blocks, etc. of a pneumatic tire is caused by the amount of movement in the periphery of the block, for example, in the ground contact area, compared to the center.
It is known that this occurs because both the slip ratio is large and wear progresses rapidly. Therefore, in the present invention, as shown in FIGS. 1 to 3, rubber having a higher elastic modulus than the central part 2 is arranged in the peripheral part 3 of the block or rib 1, so that the movement and slip rate of the block or rib can be reduced as a whole. The aim was to improve uneven wear resistance by making the surface uniform. In addition, the rubber composition of the central part 2, which is important for wear resistance, is
As long as the dynamic modulus of elasticity is set within a predetermined range, other physical properties can be controlled freely, so it is fully possible to adjust the wear resistance at the same time. In this way, it is possible to obtain a pneumatic tire with improved uneven wear resistance and wear resistance at the same time.

この際、周囲部３のゴム組成物の厚さは０．３〜１０ｍ
ｍ、好ましくは０．５〜５ａ１１とする。０．３ｍｍ未
満であると耐偏摩耗性の改良が見られず、一方１０１１
１１１１を超えると耐摩耗性の向上が少なくなってしま
う。At this time, the thickness of the rubber composition of the peripheral part 3 is 0.3 to 10 m.
m, preferably 0.5 to 5a11. If it is less than 0.3 mm, no improvement in uneven wear resistance can be seen;
If it exceeds 1111, the improvement in wear resistance will be reduced.

エッヂ部５についても同様の理由により、トレッドの両
肩部のエッヂ５より３〜２０ｍｍの範囲内に周囲部３の
ゴム組成物が入ることが必要である。Regarding the edge portion 5, for the same reason, it is necessary that the rubber composition of the peripheral portion 3 be within a range of 3 to 20 mm from the edge 5 of both shoulders of the tread.

また、第４図に示すように、周囲部３のゴム組成物を有
するブロックまたはリブ１はトレッド面の全面にある必
要はなく、適宜部分的に配すればよい。さらに、周囲ブ
ロックの厚さ（Ｑ）　　も全て均一である必要はなく、
上記厚さの範囲内であれば場所により異なっていてもか
まわない。Further, as shown in FIG. 4, the blocks or ribs 1 having the rubber composition of the peripheral portion 3 do not need to be located on the entire surface of the tread surface, but may be placed on appropriate portions. Furthermore, the thickness (Q) of the surrounding blocks does not need to be uniform;
The thickness may vary depending on the location as long as it is within the above range.

また本発明においては、上記中央部のゴム組成物の室温
におけるＥ’　（１）は６０〜１４０ｋｇｆ／ｃｍ”好
ましくは８０〜１２０ｋｇｆ／ｃｎｉ”の範囲内にある
必要がある。Ｅ！’（１）が６０ｋｇｆ／ｃｍｚより小
さいと実質上耐摩耗性の改良効果が十分ではなく、逆に
１４０ｋｇｆ／ｃｍ”より大きいと発熱老化性の面で適
当ではない１周囲部３のゴム組成物についても室温にお
けるＥ’（２）は工１０〜１９ｏｋｇｆ／Ｃｌ１１２、
好マしくは１４０〜１８０ｋｇｆ／ｃｍ”の範囲内にあ
る必要がある。Ｅ’（１）が１１０ｋｇｆ／ｃがより小
さいとブロックの動きの十分な抑制、均一化効果が得ら
れず、一方１９０ｋｇｆ　／　ｃｔｔｉ”を超えると発
熱、老化性（クラック）あるいは耐カット性の面で不適
当である。さらに、Ｂ’　（２）　−Ｂ’　（１）で表
わされるＥ′の差は１０〜９０ｋｇｆ／ｃが、好ましく
は２０〜６０ｋｇｆ／ｃＩＩｌｚの範囲にあることが必
要である。この範囲を逸脱すると中央部２と周囲部３の
ゴムの動きを十分に均一化できないという問題や、界面
からの破壊等の問題点が生じる。Further, in the present invention, E' (1) of the rubber composition in the central portion at room temperature must be in the range of 60 to 140 kgf/cm, preferably 80 to 120 kgf/cni. E! If (1) is smaller than 60 kgf/cmz, the abrasion resistance improvement effect will not be sufficient; on the other hand, if it is larger than 140 kgf/cm, the rubber composition of peripheral portion 1 is not suitable in terms of heat aging resistance. Also, E'(2) at room temperature is 10~19okgf/Cl112,
Preferably, it needs to be within the range of 140 to 180 kgf/cm. If E'(1) is smaller than 110 kgf/c, sufficient suppression and equalization effect of block movement cannot be obtained; /ctti" is unsuitable in terms of heat generation, aging (cracking) or cut resistance. Furthermore, the difference in E' expressed by B' (2) - B' (1) needs to be in the range of 10 to 90 kgf/c, preferably 20 to 60 kgf/cIIlz. If it deviates from this range, problems such as failure to uniformize the movement of the rubber in the central part 2 and peripheral part 3 and breakage from the interface will occur.

本発明の空気入りタイヤは、例えば、グリーンタイヤ成
型時にブロックまたはリブ１の中央部２を構成する前記
トレッドゴムの上にブロックまたはリブの周囲部３を構
成する前記ゴムをシート状にして貼り付けてモールド内
で加硫した後、トレッドパターンの表面を所定の２層構
造になるよう削り取ることにより得られる。また、第５
図に示すように、トレッドパターン表面を削り取ること
なく、表面をブロックまたはリブ１の周囲部を構成する
ゴムで覆い、主溝４の初期主溝深さの少なくとも１／２
の高さの所から当該周囲部のゴムが現われて２層構造と
なるようにしてもよい。この理由は、走行初期で著しい
偏摩耗が表われることはまれで、残ミゾが少なくとも１
／２になった所でかかる２Ｎ構造が現われれば耐摩耗性
および耐偏摩耗性の改良は十分達成できるといえるから
である。In the pneumatic tire of the present invention, for example, when molding a green tire, the rubber constituting the peripheral part 3 of the block or rib is pasted in a sheet form on the tread rubber constituting the central part 2 of the block or rib 1. After vulcanization in a mold, the surface of the tread pattern is scraped off to form a predetermined two-layer structure. Also, the fifth
As shown in the figure, without scraping the tread pattern surface, the surface is covered with rubber constituting the periphery of the block or rib 1, and at least 1/2 of the initial main groove depth of the main groove 4.
The surrounding rubber may appear from the height of , forming a two-layer structure. The reason for this is that significant uneven wear rarely appears in the early stages of running, and there are at least one groove remaining.
This is because if such a 2N structure appears at a value of /2, it can be said that the wear resistance and uneven wear resistance can be sufficiently improved.

また、工業的生産性を考えた場合、トレッド表面を削る
ことは非現実的であり、表面を周囲部３のゴム組成物で
覆ったまま製品とする方がより現実的であるといえる。In addition, when considering industrial productivity, it is unrealistic to scrape the tread surface, and it is more realistic to produce a product with the surface covered with the rubber composition of the peripheral portion 3.

尚各ゴム組成物のＥ′は、岩本製作所■製スペクトロメ
ーター試験機を用いて、幅５胴、厚さ２鵬の短冊状試料
で振動数５０Ｈｚ、動歪１％で２５°Ｃにて測定した。The E' of each rubber composition was measured using a spectrometer tester manufactured by Iwamoto Seisakusho on a strip-shaped sample with a width of 5 mm and a thickness of 2 mm at a frequency of 50 Hz and a dynamic strain of 1% at 25°C. did.

（実施例） 以下に実施例を示し、本発明をさらに詳細に説明する。(Example) EXAMPLES The present invention will be explained in further detail by way of Examples below.

４本の溝をトレッド接地面に有するサイズｉｏ、ｏ。Sizes io and o have four grooves on the tread surface.

Ｒ２０の空気入りタイヤ（第３図参照）に、第１表に示
す配合割合（重量部）で配合したゴム組成物を組み合わ
せたトレッドを配し、各種構造の試作タイヤを作った。Treads made of rubber compositions mixed in the proportions (parts by weight) shown in Table 1 were placed on R20 pneumatic tires (see Figure 3) to make trial tires of various structures.

耐摩耗性、耐偏摩耗性の評価は、４万Ｋｔａ走行後の残
ミゾ量と、トレッド接地面の観察によって夫々行なった
。Wear resistance and uneven wear resistance were evaluated by observing the amount of grooves remaining after running at 40,000 Kta and the tread contact surface.

第１表 ＊１・・七本合成ゴム■製、商品名　ＢＲ○１＊２・・
七本合成ゴム■製、商品名　ＳＢＲ＃１５００＊３・・
・米国モンサンド社製　商品名　サントフレックス１３
＊４・・・Ｎ−オキシジエチレンベンゾチアジル−２−
スルフェンアマイド＊５・・・耐摩耗性は、ランボーン
式摩耗試験機にて測定し、ゴム種Ｂの値を１００とした
ときの指数で表わした。Table 1 *1...Made of seven synthetic rubber ■, product name BR○1*2...
Made of seven synthetic rubber ■, product name SBR#1500*3...
・Product name: Santoflex 13, manufactured by Monsando in the United States
*4...N-oxydiethylenebenzothiazyl-2-
Sulfenamide*5...Abrasion resistance was measured using a Lambourn abrasion tester and expressed as an index when the value of rubber type B was set as 100.

１１〜３　　　　゛　　１〜８ 下記の第２表に示す各種ゴム組成物の組み合わせにより
リプの中央部と周囲部のゴム組成物を選択し、かつ第３
図に示す構造にて試作した空気入りタイヤにつき前記耐
摩耗性および耐偏摩耗性の評価を行った。11-3 ゛ 1-8 Select the rubber compositions for the central and peripheral parts of the lip from the combinations of various rubber compositions shown in Table 2 below, and
The abrasion resistance and uneven abrasion resistance of a pneumatic tire prototyped with the structure shown in the figure were evaluated.

尚、比較例１．４．６は夫々ゴム種Ｂ、　　Ｃ，Ｄ単独
のトレッドである。また、周囲部のゴム厚はいずれも５
Ｉｌｌｆｆｌである。得られた結果を下記の第２表に併
記する。Note that Comparative Examples 1, 4, and 6 are treads made of rubber types B, C, and D, respectively. In addition, the rubber thickness of the surrounding area is 5.
Illfffl. The obtained results are also listed in Table 2 below.

４　　　　Ｊ−９１０ 次に耐摩耗性および耐偏摩耗性に対するリプの周囲部の
ゴムの厚さの影響につき評価を行った。4 J-910 Next, the influence of the thickness of the rubber around the lip on the abrasion resistance and uneven abrasion resistance was evaluated.

実施例４および比較例９．１０ともに中央部のゴム組成
物をゴム種Ｃとし、かつ周囲部のゴム組成物をゴム種り
とした０周囲部のゴム厚は下記の第３表に示す通りであ
る。得られた結果を下記の第３表に示す。In both Example 4 and Comparative Examples 9 and 10, the rubber composition in the center part was rubber type C, and the rubber composition in the peripheral part was rubber seed.The rubber thickness of the peripheral part was as shown in Table 3 below. It is. The results obtained are shown in Table 3 below.

＊１・・・第２表の比較例１のタイヤの耐摩耗性を１０
０としたときの指数表示。数値が大なる程結果が良好。*1...Wear resistance of the tire of Comparative Example 1 in Table 2 is 10
Index display when set to 0. The higher the number, the better the result.

＄２・・・Ｏ：偏摩耗なし、Δ：微少あり、×：あ第２
表および第３表より、従来の単一トレッドまたは組み合
わせトレッドでは耐摩耗性と耐偏摩耗性とを同時に改善
することは不可能であるが、本発明によるとこれらを同
時に改善することができることが分る。$2...O: No uneven wear, Δ: Slight wear, ×: A second
From Table and Table 3, it is impossible to simultaneously improve wear resistance and uneven wear resistance with conventional single treads or combination treads, but according to the present invention, it is possible to improve both at the same time. I understand.

本実施例においては第３図に示すリプ基調のパターンを
持った空気入りタイヤを用いたが、第１図に示すような
ブロック基調のパターンを持った空気入りタイヤで同様
な試験を行っても同じ結果が得られ、しかも差がより拡
大して得られることが確認されている。In this example, a pneumatic tire with a lip pattern as shown in Figure 3 was used, but a similar test could also be conducted using a pneumatic tire with a block pattern as shown in Figure 1. It has been confirmed that the same results are obtained, and the difference is even larger.

（発明の効果） 以上説明してきたように、本発明の空気入り、タイヤで
は、従来改善し得なかった耐偏摩耗性と耐摩耗性とを同
時に改善することが可能となった。(Effects of the Invention) As explained above, in the pneumatic tire of the present invention, it has become possible to simultaneously improve uneven wear resistance and abrasion resistance, which could not be improved conventionally.

【図面の簡単な説明】[Brief explanation of drawings]

第１図、第２図および第４図は夫々本発明の一例空気入
りタイヤのトレッド部を示す平面図、第３図および第５
図は夫々本発明の一例空気入りタイヤのトレッド部を示
す断面図である。 １・・・ブロックまたはリブ ２・・・ブロックまたはリブの中央部 ３・・・ブロックまたはリブの周囲部1, 2 and 4 are plan views showing the tread portion of a pneumatic tire as an example of the present invention, and FIGS. 3 and 5 respectively.
Each figure is a sectional view showing a tread portion of a pneumatic tire as an example of the present invention. 1... Block or rib 2... Center part of block or rib 3... Surrounding part of block or rib

Claims (1)

【特許請求の範囲】 １、踏面に、切込んだ主溝によって踏面を区分して複数
のブロックまたはリブを形成したトレッド部を有する空
気入りタイヤにおいて、前記ブロックまたはリブの周囲
部にこれら の中央部と異なるゴム組成物を厚さ０．３〜１０ｍｍで
配置し、 室温において、中央部のゴム組成物の動的 弾性率（１）が６０〜１４０ｋｇｆ／ｃｍ＾２でかつ周
囲部のゴム組成物の動的弾性率（２）が１１０〜１９０
ｋｇｆ／ｃｍ＾２であり、 上記動的弾性率（２）の値から上記動的弾性率（１）の
値を引いた値が１０〜９０ｋｇｆ／ｃｍ＾２の範囲内に
あることを特徴とする空気入りタイヤ。 ２、上記トレッドの両肩部のエッヂより３〜２０ｍｍの
範囲内が、ブロックまたはリブの周囲部を構成する上記
ゴム組成物と同じゴム組成物より成る請求項１記載の空
気入りタイヤ。 ３、ブロックまたはリブの周方向の側面のみに上記周囲
部のゴム組成物を配置した請求項１または２記載の空気
入りタイヤ。 ４、請求項１記載の空気入りタイヤにおいて、周囲部の
ゴム組成物が初期主溝深さの少くとも１／２の高さの所
から出現し、かつトレッド表面も該周囲部のゴム組成物
で被覆されていることを特徴とする空気入りタイヤ。[Scope of Claims] 1. A pneumatic tire having a tread portion in which a plurality of blocks or ribs are formed by dividing the tread by a main groove cut into the tread, in which a plurality of blocks or ribs are formed in the periphery of the blocks or ribs. A rubber composition different from the parts is arranged to have a thickness of 0.3 to 10 mm, and at room temperature, the dynamic elastic modulus (1) of the rubber composition in the central part is 60 to 140 kgf/cm^2, and the rubber composition in the peripheral part is The dynamic elastic modulus (2) of the object is 110 to 190
kgf/cm^2, and the value obtained by subtracting the value of the dynamic elastic modulus (1) from the value of the dynamic elastic modulus (2) is within the range of 10 to 90 kgf/cm^2. pneumatic tires. 2. The pneumatic tire according to claim 1, wherein the area within a range of 3 to 20 mm from the edges of both shoulders of the tread is made of the same rubber composition as the rubber composition constituting the surrounding area of the block or rib. 3. The pneumatic tire according to claim 1 or 2, wherein the rubber composition of the peripheral portion is disposed only on the circumferential side surfaces of the blocks or ribs. 4. The pneumatic tire according to claim 1, wherein the rubber composition of the peripheral portion appears from a height of at least 1/2 of the initial main groove depth, and the tread surface is also composed of the rubber composition of the peripheral portion. A pneumatic tire characterized by being coated with.
JP1070039A 1989-03-22 1989-03-22 Pneumatic tire Pending JPH02249707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1070039A JPH02249707A (en) 1989-03-22 1989-03-22 Pneumatic tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1070039A JPH02249707A (en) 1989-03-22 1989-03-22 Pneumatic tire

Publications (1)

Publication Number Publication Date
JPH02249707A true JPH02249707A (en) 1990-10-05

Family

ID=13420045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1070039A Pending JPH02249707A (en) 1989-03-22 1989-03-22 Pneumatic tire

Country Status (1)

Country Link
JP (1) JPH02249707A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037489A1 (en) * 1998-01-26 1999-07-29 Michelin Recherche Et Technique S.A. Tire having a groove wall lining for reducing formation of anomalies causing subjective user dissatisfaction
WO2000053437A1 (en) * 1999-01-21 2000-09-14 Michelin Recherche Et Technique S.A. Tire having a groove wall lining for reducing formation of anomalies causing subjective user dissatisfaction
JP2007528312A (en) * 2003-12-30 2007-10-11 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Pneumatic tire and manufacturing method thereof
JP2007528311A (en) * 2003-12-30 2007-10-11 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Automotive tires
US7559348B2 (en) * 2004-02-03 2009-07-14 The Goodyear Tire & Rubber Company Tire with rubber tread of circumferential zones with graduated physical properties
US20130092302A1 (en) * 2011-10-14 2013-04-18 Sumitomo Rubber Industries, Ltd. Heavy duty tire
JP2013203077A (en) * 2012-03-27 2013-10-07 Sumitomo Rubber Ind Ltd Pneumatic tire
CN103998256A (en) * 2011-12-16 2014-08-20 米其林企业总公司 Tread for pneumatic tire
JP2015081079A (en) * 2013-10-23 2015-04-27 ハンコック タイヤ カンパニー リミテッド Tire tread block structure
US20150183272A1 (en) * 2011-12-22 2015-07-02 Compagnie Generale Des Establissements Michelin Tread comprising oblique blocks
FR3016830A1 (en) * 2014-01-30 2015-07-31 Michelin & Cie
EP2946945A1 (en) * 2012-12-28 2015-11-25 Compagnie Générale des Etablissements Michelin Tread for pneumatic tire and pneumatic tire having said tread
US20150343851A1 (en) * 2012-12-28 2015-12-03 Michelin Recherche Et Technique S.A. Tread comprising sculpted elements comprising a covering layer
US20160311266A1 (en) * 2013-12-17 2016-10-27 Compagnie Generale Des Etablissements Michelin Tread band having blocks and fine grooves on the blocks
US9623707B2 (en) 2014-12-10 2017-04-18 The Goodyear Tire & Rubber Company Tire with groove reinforcement
US11491821B2 (en) * 2017-12-13 2022-11-08 Bridgestone Corporation Tire

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037489A1 (en) * 1998-01-26 1999-07-29 Michelin Recherche Et Technique S.A. Tire having a groove wall lining for reducing formation of anomalies causing subjective user dissatisfaction
US6213181B1 (en) 1998-01-26 2001-04-10 Michelin Recherche Et Technique S.A. Tire having a groove wall lining for reducing formation of anomalies causing subjective user dissatisfaction
WO2000053437A1 (en) * 1999-01-21 2000-09-14 Michelin Recherche Et Technique S.A. Tire having a groove wall lining for reducing formation of anomalies causing subjective user dissatisfaction
JP2007528312A (en) * 2003-12-30 2007-10-11 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Pneumatic tire and manufacturing method thereof
JP2007528311A (en) * 2003-12-30 2007-10-11 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Automotive tires
KR101064612B1 (en) * 2003-12-30 2011-09-15 피렐리 타이어 소시에떼 퍼 아찌오니 Pneumatic Tire and Process For Its Manufacture
US8028731B2 (en) * 2003-12-30 2011-10-04 Pirelli Pneumatici S.P.A. Tire for vehicles
US8104523B2 (en) 2003-12-30 2012-01-31 Pirelli Pneumatici S.P.A. Pneumatic tire and process for its manufacture
US7559348B2 (en) * 2004-02-03 2009-07-14 The Goodyear Tire & Rubber Company Tire with rubber tread of circumferential zones with graduated physical properties
US8925599B2 (en) * 2011-10-14 2015-01-06 Sumitomo Rubber Industries, Ltd. Heavy duty tire
US20130092302A1 (en) * 2011-10-14 2013-04-18 Sumitomo Rubber Industries, Ltd. Heavy duty tire
CN103998256A (en) * 2011-12-16 2014-08-20 米其林企业总公司 Tread for pneumatic tire
JPWO2013088570A1 (en) * 2011-12-16 2015-04-27 コンパニー ゼネラール デ エタブリッスマン ミシュラン Pneumatic tire tread
EP2792504A4 (en) * 2011-12-16 2015-07-15 Michelin & Cie Tread for pneumatic tire
US9776457B2 (en) * 2011-12-22 2017-10-03 Compagnie Generale Des Etablissements Michelin Tread comprising oblique blocks
US20150183272A1 (en) * 2011-12-22 2015-07-02 Compagnie Generale Des Establissements Michelin Tread comprising oblique blocks
JP2013203077A (en) * 2012-03-27 2013-10-07 Sumitomo Rubber Ind Ltd Pneumatic tire
EP2946945A1 (en) * 2012-12-28 2015-11-25 Compagnie Générale des Etablissements Michelin Tread for pneumatic tire and pneumatic tire having said tread
US20150343851A1 (en) * 2012-12-28 2015-12-03 Michelin Recherche Et Technique S.A. Tread comprising sculpted elements comprising a covering layer
EP2946945A4 (en) * 2012-12-28 2016-11-30 Michelin & Cie Tread for pneumatic tire and pneumatic tire having said tread
RU2640666C2 (en) * 2012-12-28 2018-01-11 Компани Женераль Дэз Этаблиссман Мишлен Pneumatic tire tread and pneumatic tire with such tread
US9944129B2 (en) * 2012-12-28 2018-04-17 Compagnie Generale Des Etablissements Michelin Tread comprising sculpted elements comprising a covering layer
JP2015081079A (en) * 2013-10-23 2015-04-27 ハンコック タイヤ カンパニー リミテッド Tire tread block structure
US20160311266A1 (en) * 2013-12-17 2016-10-27 Compagnie Generale Des Etablissements Michelin Tread band having blocks and fine grooves on the blocks
FR3016830A1 (en) * 2014-01-30 2015-07-31 Michelin & Cie
US9623707B2 (en) 2014-12-10 2017-04-18 The Goodyear Tire & Rubber Company Tire with groove reinforcement
US11491821B2 (en) * 2017-12-13 2022-11-08 Bridgestone Corporation Tire

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