JPS62199506A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPS62199506A JPS62199506A JP61040356A JP4035686A JPS62199506A JP S62199506 A JPS62199506 A JP S62199506A JP 61040356 A JP61040356 A JP 61040356A JP 4035686 A JP4035686 A JP 4035686A JP S62199506 A JPS62199506 A JP S62199506A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tire
- foamed
- sidewall
- pneumatic 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 48
- 239000005060 rubber Substances 0.000 claims abstract description 48
- 238000005187 foaming Methods 0.000 claims abstract description 14
- 239000011324 bead Substances 0.000 claims abstract description 5
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 3
- 229920003052 natural elastomer Polymers 0.000 abstract description 3
- 229920001194 natural rubber Polymers 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 2
- 230000003712 anti-aging effect Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000001993 wax Substances 0.000 description 6
- 239000007790 solid phase Substances 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008733 trauma Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920001821 foam rubber Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 208000032544 Cicatrix Diseases 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 230000037387 scars Effects 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000000472 traumatic effect Effects 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は空気入りタイヤ、詳しくはタイヤのサイドウオ
ール部に於いて発泡ゴムを用いることにより耐候性を著
しく改良した空気入りタイヤに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pneumatic tire, and more particularly to a pneumatic tire whose weather resistance is significantly improved by using foamed rubber in the sidewall portion of the tire.
（従来技術とその問題点）
従来、タイヤを長期間使用或いは放置すると大気中のオ
ゾン或いは紫外線にされされることにより、サイドウオ
ール部にクラックが発生することは一般に知れている。(Prior Art and its Problems) Conventionally, it is generally known that when a tire is used for a long period of time or left unused, cracks occur in the sidewall portion due to exposure to atmospheric ozone or ultraviolet rays.
このことＣ±タイヤの外観を損ねるばかりか近年更生タ
イヤの普及により、台タイヤの長寿命化が要求されてい
ることから年々高まっているタイヤ耐候性の改良に対す
るニーズにもそぐわない、このため、従来より、長時間
老防効果が持続する老化防止剤の開発や、移行速度の遅
い老化防止剤・ワックスの開発が行われているものの、
上記の問題点を満足するようなサイドウオールゴムが未
だ得られていないのが現状である。Not only does this damage the appearance of C± tires, but it also does not meet the growing need for improved tire weather resistance, which has been increasing year by year due to the spread of retreaded tires in recent years, which has led to demands for longer lifespan tires. Although efforts are being made to develop anti-aging agents that maintain anti-aging effects for a long time, and anti-aging agents and waxes that have a slow migration rate.
At present, a sidewall rubber that satisfies the above problems has not yet been obtained.
本発明の目的は、長時間にわたり、タイヤサイドウオー
ル部のクラックを防止し、耐候性の持続性を著しく改良
したタイヤを提供することにある。An object of the present invention is to provide a tire that prevents cracks in the tire sidewall portion over a long period of time and has significantly improved durability of weather resistance.
（発明が解決しようとする問題点）
本発明者は前記問題点を解決するべく、種々検討した結
果、タイヤのサイドウオール部のゴム内部に独立気泡を
含有させることにより、前記問題点を解決しうろことを
確かめ、本発明を達成するに至った。(Problems to be Solved by the Invention) As a result of various studies in order to solve the above-mentioned problems, the present inventor solved the above-mentioned problems by incorporating closed cells into the rubber of the sidewall portion of the tire. After confirming the scales, the present invention was achieved.
即ち、本発明はトレッド部とそのトレッド部の両肩でト
レッド部に連なる一対のサイドウオール部と、サイドウ
オール部の内周にそれぞれ形成した一対のビード部を備
えた空気入りタイヤに於いて、前記サイドウオール部を
形成するゴム中に平均気泡率が５〜１１００ｐにある独
立気泡を有し、且つ、発泡率Ｖｓが１〜８０％の範囲に
ある発泡ゴムを含有することを特徴とする。That is, the present invention provides a pneumatic tire comprising a tread portion, a pair of sidewall portions connected to the tread portion at both shoulders of the tread portion, and a pair of bead portions respectively formed on the inner periphery of the sidewall portion. The rubber forming the sidewall portion is characterized by containing foamed rubber having closed cells having an average cell ratio of 5 to 1100 p and a foaming ratio Vs of 1 to 80%.
ここにおいて１発泡ゴムの平均気泡径は５〜１００ ｐ
ｍ好ましくは２０〜８０ＪＬｍであるが、その理由は５
ｇｍ未満では独立気泡を維持することが困難となり、サ
イドウオールゴムの強力低下或いはコード部への水分の
浸入を助長し、また、平均径が１００ｇｍを超えるとサ
イドの外傷性が低下するからである。Here, the average cell diameter of one foamed rubber is 5 to 100 p.
m is preferably 20 to 80 JLm, and the reason is 5.
If the average diameter is less than 100 gm, it will be difficult to maintain closed cells, which will reduce the strength of the sidewall rubber or encourage moisture to infiltrate into the cord.If the average diameter exceeds 100 gm, the traumatic nature of the side will decrease. .
次に、発泡率ｖＳは、次式
％式％）
で表わされ、ρｌは発泡ゴムの密度（ｇ／ｃｒｎ’）、
ｐＱは発泡ゴムのゴム固相部の密度（ｇ／ｃｒｎ’）、
９ｇは発泡ゴムの気泡内のガス部の密度（ｇ／Ｃｍ″）
である０発泡ゴムはゴム固相部と、ゴム固相部によって
形成される空洞（独立気泡）すなわち気泡内のガス部と
から構成されている。Next, the foaming rate vS is expressed by the following formula (% formula %), where ρl is the density of the foamed rubber (g/crn'),
pQ is the density of the rubber solid phase part of the foamed rubber (g/crn'),
9g is the density of the gas part in the foam rubber bubbles (g/Cm'')
0 foam rubber is composed of a rubber solid phase portion and a cavity (closed cell) formed by the rubber solid phase portion, that is, a gas portion within the cell.
また、ガス部の密度ρｇは極めて小さく、はぼ零に近く
、かつ、ゴム固相部の密度ｐ１に対して極めて小さいの
で、式（１）は、次式Ｖｓ＝ Ｃｐ Ｏ／ｐ １）ｘｔ
ｏｏ （％）−（２）とほぼ同等となる０本発明に於て
発泡率Ｖｓは１〜８０％の好ましくは２０〜６０％の範
囲である０発泡率ｖＳを１〜８０％としたのは、発泡率
が８０％を越えるとサイド外傷時の傷が深くなるばかり
か傷の周方向への成長速度を悪化せしめる結果となり、
発泡率が１％未満では本願の目的を達成することができ
ないからであるまた、サイドウオール部を形成するゴム
は天然ゴムの独立或いは合成ゴムとのブレンドであり、
合成ゴムとしては例えばスチレン−ブタジェン共重合ゴ
ム、ポリブタジェンゴム等が使用できる０発泡ゴム層の
厚みはサイドウィール部厚みの５０％以上が好ましく、
サイドウオールゴム全体が発泡ゴムからなるものでもよ
い。In addition, the density ρg of the gas part is extremely small, close to zero, and is extremely small compared to the density p1 of the rubber solid phase part, so equation (1) is expressed as the following equation: Vs=Cp O/p 1)xt
oo (%) - (2) In the present invention, the foaming rate Vs is in the range of 1 to 80%, preferably 20 to 60%. If the foaming rate exceeds 80%, not only will the scars caused by side trauma become deeper, but the growth speed of the scars in the circumferential direction will be worsened.
This is because the purpose of the present application cannot be achieved if the foaming rate is less than 1%.In addition, the rubber forming the sidewall portion is independent of natural rubber or blended with synthetic rubber,
As the synthetic rubber, for example, styrene-butadiene copolymer rubber, polybutadiene rubber, etc. can be used. The thickness of the foamed rubber layer is preferably 50% or more of the thickness of the side wheel portion,
The entire sidewall rubber may be made of foamed rubber.
本発明による空気入りタイヤを得るには発泡ゴムの配合
剤として発泡剤、発泡助剤および加硫促進剤の量を変え
て所定の平均気泡径、発泡率を調整し、他は通常のサイ
ドゴム用配合により、通常の方法にてタイヤ形成、加硫
すればよい。In order to obtain the pneumatic tire according to the present invention, the amounts of the foaming agent, foaming aid, and vulcanization accelerator are adjusted to a predetermined average cell diameter and foaming rate by changing the amounts of the foaming agent, foaming aid, and vulcanization accelerator. Depending on the formulation, tire formation and vulcanization may be carried out in a conventional manner.
なお、サイドウオールに発泡ゴムを使用してもタイヤ加
硫の際、金型モールドと接触する部分に於ては、発泡ゴ
ムは加硫中自然にその表面に厚み１００ ｐｍ程度の無
発泡スキン層を形成するため、サイドウオール表面でク
ラック発生原因となる核はなく、また外観上の問題もな
い。Even if foamed rubber is used for the sidewalls, during tire vulcanization, the foamed rubber will naturally form a non-foamed skin layer on its surface with a thickness of about 100 pm in the areas that come into contact with the metal mold. , there are no nuclei that can cause cracks on the sidewall surface, and there are no problems with appearance.
（作 用）
本発明によるタイヤは従来のタイヤに比し、サイドウオ
ール部の耐候性を著しく長期間持続させることができる
。即ち、その理由は、前記による独立気泡をサイドウオ
ールゴム中に含有させることにより、サイドウオールゴ
ムに配合された老化防止剤・ワックスは独立気泡中で一
旦析出し滞留するが、またやがてタイヤの温度が上昇す
ることにより表面へ析出し、皮膜を作り、クラックの発
生を防止し、従って、老化防止剤、ワックスは一挙に表
面へ析出することがなく、徐々に表面へ析出するので、
見掛上、老化防止剤等の移動速度を遅くしたことになり
、長時間に亘り、クラック発生防止効果が持続するため
と考えられる。(Function) The tire according to the present invention can maintain weather resistance of the sidewall portion for a significantly longer period of time than conventional tires. That is, the reason for this is that by incorporating the closed cells described above into the sidewall rubber, the anti-aging agent/wax blended into the sidewall rubber will temporarily precipitate and remain in the closed cells, but eventually the temperature of the tire will increase. As the amount increases, it precipitates on the surface, forms a film, and prevents the occurrence of cracks. Therefore, the anti-aging agent and wax do not precipitate on the surface all at once, but gradually precipitate on the surface.
This is thought to be because the apparent movement speed of the anti-aging agent, etc. is slowed down, and the effect of preventing crack generation persists for a long time.
さらに、本発明によるタイヤはサイド部に於る耐外傷性
、亀裂生長性を損ねることもないので外観上の問題もな
く、同時にタイヤが軽量になるというメリットを併せ持
っている。Further, the tire according to the present invention does not impair external damage resistance or crack growth resistance in the side portion, so there is no problem in appearance, and at the same time, the tire has the advantage of being lightweight.
（実施例） 以下１本発明の実施例を図面に基づいて説明する。(Example) An embodiment of the present invention will be described below based on the drawings.
第１図は本発明に係る空気入りタイヤの実施例を示す、
同図において、空気入りタイヤはタイヤのトレッド部ｌ
と、発泡ゴムからなるサイドウオール部２と一対のビー
ド部３とから構成されている。FIG. 1 shows an embodiment of a pneumatic tire according to the present invention.
In the same figure, the pneumatic tire has a tread portion l.
It is composed of a sidewall part 2 made of foamed rubber and a pair of bead parts 3.
サイドウオール部２のゴム成分としては天然ゴムとポリ
ブタジェンゴムのブレンド物を用い、発泡剤、発泡助剤
および加硫促進剤の量を変えて、サイドゴムの発泡平均
径、発泡率を調整し、他は通常のサイドゴム配合を用い
て、かつ発泡部を除いた固相の弾性率が一定となるよう
にしてＴＢＲ１０００Ｒ２０のタイヤを表１に示す各水
準で所定本数ずつを試作した。また比較のため老化防止
剤、ワックス減量したものも併せて検討した。なお、サ
イドウオール部２以外の構成およびタイヤ製造方法は通
常の空気入りタイヤと同じであり、詳細な説明は省略す
る試験法
（１）平均気泡径および発泡率Ｖｓ
平均気泡径は試験タイヤのサイドウオール部の発泡ゴム
層からブロック状の試料を切り出し、その試料断面の写
真を倍゛率１００〜４００の光学顕微鏡で撮影し、２０
０個以上の独立気泡の気泡径を測定し、算術平均値とし
て、表わした。また１発泡率Ｖｓはブロック状の資料の
密度ρ０を測定し、前記式（２）を用いて求めた。A blend of natural rubber and polybutadiene rubber was used as the rubber component of the sidewall portion 2, and the average foam diameter and foaming rate of the side rubber were adjusted by changing the amounts of the blowing agent, foaming aid, and vulcanization accelerator. A predetermined number of tires of TBR 1000R20 were trial-produced at each level shown in Table 1 using a normal side rubber compound and keeping the elastic modulus of the solid phase constant except for the foamed portion. For comparison, we also examined products with reduced amounts of anti-aging agent and wax. The structure other than the sidewall portion 2 and the tire manufacturing method are the same as those of a normal pneumatic tire, and detailed explanations are omitted.Test method (1) Average cell diameter and foaming ratio Vs The average cell diameter is the sidewall diameter of the test tire. A block-shaped sample was cut out from the foam rubber layer of the wall section, and a photograph of the cross section of the sample was taken with an optical microscope at a magnification of 100 to 400.
The cell diameter of 0 or more closed cells was measured and expressed as an arithmetic mean value. Further, the 1 foaming rate Vs was determined by measuring the density ρ0 of a block-shaped material and using the above formula (2).
（２） Ｊ Ｉ Ｓ硬度および３００％伸張時の弾性率
通常のトレッドゴムと同様に所定の試験試料を作成し５
通常のＪＩＳ硬度の測定および３００％伸張時のゴム弾
性率を測定した。(2) JIS hardness and elastic modulus at 300% elongation Predetermined test samples were prepared in the same way as ordinary tread rubber.
A normal JIS hardness measurement and a rubber elastic modulus at 300% elongation were measured.
（３）サイド耐候性
各水準８本ずつ初期量を大型トラックの前輪袋はし、更
生後駆動軸外側に装置し、サイド部クラックの経時変化
を観察した０表１に結果を示すがＡはクラックないか或
いは極めて小、Ｂはクラック程庶小、Ｃはクラック程度
中、Ｄはクラック程度大を表わし目視にて評価した。(3) Side Weather Resistance An initial amount of 8 pieces for each level was placed in a bag for the front wheel of a large truck, and after rehabilitation, it was installed on the outside of the drive shaft and the changes in side cracks over time were observed.The results are shown in Table 1. No cracks or very small cracks, B indicates small cracks, C indicates medium cracks, and D indicates large cracks, and the evaluation was made visually.
（４）サイド外傷性
各水準１木ずつサイドウオールの最大重の位置に予め深
さ２腸層、巾３■鵬の傷をタイヤの周方向に周上８ケ所
入れておき、これら速度５０ｋｓ／ｈｒのドラムに低内
圧で正規荷重の１．２倍にて押しつけ１００時間連続走
行させた後に、傷の成長速度を無発泡タイヤを１００と
して指数で表示した。(4) Side trauma In advance, 8 scratches with a depth of 2 layers and a width of 3 cm are placed on the tire circumferentially at the position of the heaviest part of the sidewall, one for each level. After running continuously for 100 hours by pressing the tire against a drum with a low internal pressure and 1.2 times the normal load, the growth rate of the scratches was expressed as an index, with the non-foamed tire set as 100.
前記供試タイヤを第１表各処方のサイドウオールゴムを
使用して製造し、上述試験法に従って本発明の効果を確
認した。The above-mentioned test tires were manufactured using sidewall rubbers having the respective formulations shown in Table 1, and the effects of the present invention were confirmed according to the above-mentioned test method.
なお、比較例１．２はサイドウオールゴムに独立気泡の
発泡ゴムを使用しない通常型のタイヤである。試験結果
は第１表に示す。Note that Comparative Example 1.2 is a normal type tire in which closed-cell foamed rubber is not used for the sidewall rubber. The test results are shown in Table 1.
これらの結果から明らかなように本発明を適用した実施
例１〜３のタイヤはサイド耐候性が優れており、特に長
期使用後、例えばタイヤトレッドを２回更生した後に於
てもサイドクラック性は少なくサイド耐候性に優れ、且
つサイド外傷性も通常の無発泡ゴムの場合（比較例１．
２）とほぼ同程度であり、外観上も問題ないことがわか
る。As is clear from these results, the tires of Examples 1 to 3 to which the present invention was applied have excellent side weather resistance, and the side crack resistance is particularly high even after long-term use, for example, after the tire tread has been retreaded twice. In the case of ordinary non-foamed rubber, it has excellent side weather resistance and side trauma resistance (Comparative Example 1).
It can be seen that it is almost the same as 2), and there is no problem in terms of appearance.
なお、本発明にあっては、実施例２と比較例１とかられ
かるように老化防止剤命ワックスを減量しても無発泡ゴ
ムと比べ長期間後の耐候性を改良できるという特徴も併
せて有していることは注目される。Furthermore, as shown in Example 2 and Comparative Example 1, the present invention also has the feature that even if the amount of antioxidant life wax is reduced, the weather resistance after a long period of time can be improved compared to non-foamed rubber. It is noteworthy that it has
（発明の効果）
以上の実施例、比較例から明らかなように、タイヤサイ
ドウオール部に於いて独立気泡を含有するゴムを使用す
ることにより、サイド外傷性を損ねることなくタイヤサ
イドウオール部の耐候性を大幅に改良した空気入りタイ
ヤを提供することができる。(Effects of the Invention) As is clear from the above Examples and Comparative Examples, by using rubber containing closed cells in the tire sidewall part, the weather resistance of the tire sidewall part can be improved without impairing side trauma resistance. It is possible to provide a pneumatic tire with significantly improved properties.
また同時にかかる発泡ゴムでは老化防止剤、ワックスを
減量しても無発泡ゴムと比べ耐候性が維持できるのでサ
イドウオール部の外観性を改良できることもできる。At the same time, such foamed rubber can maintain weather resistance compared to non-foamed rubber even if the amount of anti-aging agent and wax is reduced, so that the appearance of the sidewall portion can be improved.
更にタイヤの一部に発泡ゴムを使用することによりタイ
ヤが軽量化になるというメリットがあることはいうまで
もない。Furthermore, it goes without saying that the use of foamed rubber in a portion of the tire has the advantage of reducing the weight of the tire.
第１図は本発明に係る空気入りタイヤの実施例を示す図
である。ｌはトレッド部、２はサイドウオール部、３は
発泡ゴム、４はサイドウオール部最大巾の位置、５はビ
ード部を示す。
代理人弁理士 久 米 英 −
（ほか１名）FIG. 1 is a diagram showing an embodiment of a pneumatic tire according to the present invention. 1 is the tread portion, 2 is the sidewall portion, 3 is the foamed rubber, 4 is the maximum width position of the sidewall portion, and 5 is the bead portion. Representative Patent Attorney Hide Kume - (1 other person)
Claims (1)
る一対のサイドウォール部とサイドウォール部の内周に
それぞれ形成した一対のビード部を備える空気入りタイ
ヤにおいて、前記サイドウォール部を形成するゴムは平
均気泡径５〜１００μｍの独立気泡を含有し、且つ、発
泡率Ｖｓが１〜８０％の範囲にある発泡ゴムからなるこ
とを特徴とする耐候性が改良された空気入りタイヤ。In a pneumatic tire comprising a tread portion, a pair of sidewall portions connected to the tread portion at both shoulders of the tread portion, and a pair of bead portions formed on the inner periphery of the sidewall portions, the rubber forming the sidewall portions is A pneumatic tire with improved weather resistance characterized by being made of foamed rubber containing closed cells with an average cell diameter of 5 to 100 μm and having a foaming rate Vs in the range of 1 to 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61040356A JPS62199506A (en) | 1986-02-27 | 1986-02-27 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61040356A JPS62199506A (en) | 1986-02-27 | 1986-02-27 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62199506A true JPS62199506A (en) | 1987-09-03 |
Family
ID=12578360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61040356A Pending JPS62199506A (en) | 1986-02-27 | 1986-02-27 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62199506A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5439041A (en) * | 1991-10-08 | 1995-08-08 | Bridgestone/Firestone, Inc. | Vehicle tire including lightweight stiffening spacer in each sidewall |
| JPH07276909A (en) * | 1994-04-11 | 1995-10-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2011500414A (en) * | 2007-10-15 | 2011-01-06 | ソシエテ ド テクノロジー ミシュラン | Tire with annular band and support structure |
| JP2017094840A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
| JP2017094839A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
| JP2017094841A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
-
1986
- 1986-02-27 JP JP61040356A patent/JPS62199506A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5439041A (en) * | 1991-10-08 | 1995-08-08 | Bridgestone/Firestone, Inc. | Vehicle tire including lightweight stiffening spacer in each sidewall |
| JPH07276909A (en) * | 1994-04-11 | 1995-10-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2011500414A (en) * | 2007-10-15 | 2011-01-06 | ソシエテ ド テクノロジー ミシュラン | Tire with annular band and support structure |
| JP2017094840A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
| JP2017094839A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
| JP2017094841A (en) * | 2015-11-20 | 2017-06-01 | 横浜ゴム株式会社 | Pneumatic tire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1113357A (en) | Radial-ply tire | |
| US5147477A (en) | Pneumatic tire having foamed tread rubber | |
| EP2174804B1 (en) | Tread for retreaded tire and retreaded tire | |
| CA1108040A (en) | Pneumatic radial tires for passenger cars having low rolling resistance and excellent slipping resistance | |
| WO2008054023A1 (en) | Pneumatic tire with excellent high-speed durability | |
| US5351734A (en) | Pneumatic tire with foam rubber in the tread | |
| JPH071907A (en) | Pneumatic tire with improved on-ice/snow traction | |
| JPS62199506A (en) | Pneumatic tire | |
| JPH0544361B2 (en) | ||
| EP0337787B1 (en) | Pneumatic tire | |
| JPH06191221A (en) | Pneumatic tire for heavy load | |
| US5181976A (en) | Pneumatic tire having expanded outer tread rubber layer | |
| JPH09255813A (en) | Pneumatic tire | |
| EP0734886A1 (en) | Foamed rubber compositions for pneumatic tires and method of producing the same | |
| JPS6392659A (en) | Pneumatic tire | |
| CN114174078B (en) | Tire with improved tread | |
| JPH0550809A (en) | Pneumatic tire | |
| JPH06219109A (en) | Pneumatic tire for heavy load | |
| JPH04198241A (en) | Rubber composition for tire | |
| JPS6390402A (en) | Pneumatic tire | |
| JPH0776202A (en) | Pneumatic tire | |
| JPS62167336A (en) | Pneumatic tire | |
| JP2564760B2 (en) | Pneumatic tire | |
| JPS6390403A (en) | Pneumatic tire | |
| JP5410161B2 (en) | tire |