JPH11278008A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH11278008A JPH11278008A JP10078009A JP7800998A JPH11278008A JP H11278008 A JPH11278008 A JP H11278008A JP 10078009 A JP10078009 A JP 10078009A JP 7800998 A JP7800998 A JP 7800998A JP H11278008 A JPH11278008 A JP H11278008A
- Authority
- JP
- Japan
- Prior art keywords
- antioxidant
- groove bottom
- tread
- tire
- outermost
- 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
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 49
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 49
- 229920001971 elastomer Polymers 0.000 claims abstract description 27
- 239000005060 rubber Substances 0.000 claims abstract description 27
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 abstract description 3
- 238000002845 discoloration Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000003712 anti-aging effect Effects 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 11
- 230000032683 aging Effects 0.000 description 8
- 239000000945 filler Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000013329 compounding Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、トレッドの溝底の
亀裂を防止し、かつ老化防止剤のブルーム現象によるタ
イヤの茶変色を防止する空気入りタイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire for preventing cracks at the groove bottom of a tread and preventing browning of the tire due to blooming of an antioxidant.
【０００２】[0002]
【従来の技術】自動車用タイヤには、原料ゴムとして、
天然ゴム、ブタジエンゴム等のジエン系ゴムが用いられ
ている。そのオゾンや酸素による老化、また経日や走行
によるゴムの硬化による亀裂を防止する目的で、原料ゴ
ムにアミン系の老化防止剤、パラフィン系のワックス等
を配合したゴム組成物が用いられている。2. Description of the Related Art Tires for automobiles are used as raw rubber.
Diene rubbers such as natural rubber and butadiene rubber are used. For the purpose of preventing aging due to ozone or oxygen, and cracking due to hardening of the rubber due to aging or running, a rubber composition in which an amine-based antioxidant, a paraffin-based wax, and the like are blended with raw rubber is used. .
【０００３】タイヤトレッドのショルダー部近傍はコー
ナリングの際、外力により水平方向に大きな力を受け
る。トレッド表面にある主溝のうち最も外側の主溝は、
最もショルダー部に近接する主溝であるため、この力を
繰り返し受ける。その結果当該溝底（以下最外溝底とい
う）のゴムの老化が早く、亀裂が早期に発生する。また
該溝底はトレッド中央近傍の溝底と比較して日光や空気
に長時間触れるため、オゾン等による老化も該溝底の亀
裂の原因となっている。[0003] In the cornering, the vicinity of the shoulder portion of the tire tread receives a large horizontal force due to an external force. Of the main grooves on the tread surface, the outermost main groove is
Since this is the main groove closest to the shoulder portion, it repeatedly receives this force. As a result, the rubber at the bottom of the groove (hereinafter referred to as the outermost groove bottom) is quickly aged and cracks are generated at an early stage. Further, since the groove bottom is exposed to sunlight and air for a longer time than the groove bottom near the center of the tread, aging due to ozone or the like also causes cracks in the groove bottom.
【０００４】[0004]
【発明が解決しようとする課題】この現象を防ぐため
に、トレッドゴムの老化防止剤を通常量（ゴム成分全体
の２重量％程度）以上に増量することで解決をはかろう
とすれば、前記老化防止剤は短期間でブルーム現象をお
こし、早期の茶変色を招きやすい。前記最外溝底の亀裂
を防止するためにトレッドゴムに老化防止剤を増量する
と、上述の早期の茶変色の他にも次の問題が生ずる。す
なわちタイヤの構造において、トレッドゴムはトレッド
全体を覆っているため、トレッドゴムに老化防止剤を増
量すると高コストである。また老化防止剤を、老化の最
も激しい最外溝底近傍に集中して配分させることはタイ
ヤの生産工程上困難である。加えて、加硫工程における
金型成形の際の高温、またその際のトレッド部ゴムの流
動が原因となって老化防止剤は失われ易く、効果は少な
い。In order to prevent this phenomenon, it is necessary to increase the antioxidant of the tread rubber to an ordinary amount (about 2% by weight of the whole rubber component). The inhibitor causes a bloom phenomenon in a short period of time, and tends to cause early brown discoloration. If the antioxidant is added to the tread rubber in order to prevent the crack at the bottom of the outermost groove, the following problem occurs in addition to the above-mentioned early brown discoloration. That is, in the structure of the tire, the tread rubber covers the entire tread, so that an increase in the amount of the antioxidant in the tread rubber is expensive. In addition, it is difficult in the tire production process to concentrate and distribute the anti-aging agent near the bottom of the outermost groove where aging is most intense. In addition, the antioxidant is easily lost due to the high temperature during molding in the vulcanization step and the flow of the tread rubber at that time, and the effect is small.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明は以下の手段を講じた。すなわち、タイヤト
レッドの少なくとも最外溝底の径内側でかつ周方向全周
にわたり老化防止剤増量材を埋設した（請求項１）。こ
のように構成したことにより、トレッドゴムの磨耗や金
型成形等によってトレッドゴムに配合される老化防止剤
量が減少しても、老化防止剤は経日により低含有量の領
域に移行する性質があるので、この移行性により、老化
防止剤が最外溝底の老化、亀裂を防止できるのである。Means for Solving the Problems In order to solve the above problems, the present invention has taken the following means. That is, the antioxidant increasing material is embedded at least radially inside the outermost groove bottom of the tire tread and over the entire circumferential direction. With this configuration, even when the amount of the antioxidant compounded in the tread rubber is reduced due to wear of the tread rubber or molding of the tread rubber, the antioxidant shifts to a low content region over time. Therefore, due to this migration property, the antioxidant can prevent aging and cracking of the outermost groove bottom.
【０００６】また、前記老化防止剤増量材は４〜６重量
％の老化防止剤を配合してなるゴム組成物である（請求
項２）。 先述した通り、通常タイヤに使われるゴム組
成物に老化防止剤は２重量％程度配合されている。この
量の２〜３倍を配合することにより、前記増量材は他の
部材と比較して最も多量に老化防止剤を含有することに
なる。従って最も老化、亀裂が激しい最外溝底に対し、
老化防止剤供給源としての役目を果たせる。The antioxidant extender is a rubber composition containing 4 to 6% by weight of an antioxidant. As described above, about 2% by weight of an antioxidant is added to a rubber composition usually used for tires. By adding 2 to 3 times this amount, the extender contains the antioxidant in the largest amount as compared with other members. Therefore, for the outermost groove bottom where aging and cracks are severe,
Can serve as a source of anti-aging agent.
【０００７】また、バンドプライを構成するゴム層に老
化防止剤を４〜６重量％配合して、溝底に対して老化防
止剤供給を行ってもよい（請求項３）。バンドプライは
タイヤのショルダー部の径内側に埋設されている部材
で、タイヤ回転中のブレーカーのリフティングを抑え
る。リフティングとは、タイヤが高速回転することによ
り発生する遠心力によってブレーカー層がタイヤ外側へ
持ち上がる現象である。Further, the rubber layer constituting the band ply may be mixed with an antioxidant in an amount of 4 to 6% by weight to supply the antioxidant to the groove bottom. The band ply is a member embedded inside the shoulder portion of the tire to suppress lifting of the breaker during rotation of the tire. Lifting is a phenomenon in which the breaker layer is lifted to the outside of the tire due to centrifugal force generated when the tire rotates at high speed.
【０００８】バンドプライの埋設部位はトレッド最外溝
底近傍の径内側に相当する．また、タガのように周方向
に埋設されているため、その容積はトレッドゴム部と比
較してずっと小さく配合コストを低く抑えられる。従っ
てバンドプライに老化防止剤を増量しても、前記老化防
止剤増量材と同様の効果があり、従来トレッド部へ老化
防止剤を増量することで生じていた先述の諸問題が解決
する。The buried portion of the band ply corresponds to the inside of the diameter near the bottom of the outermost groove of the tread. In addition, since it is buried in the circumferential direction like a tag, its volume is much smaller than that of the tread rubber portion, and the compounding cost can be kept low. Therefore, even if the anti-aging agent is added to the band ply, the same effect as that of the anti-aging agent extender is obtained, and the above-mentioned problems which have been caused by increasing the anti-aging agent in the tread portion in the past can be solved.
【０００９】[0009]
【発明の実施の形態】以下、図面に基づいて本発明の実
施の形態を説明する。図１〜図８に示す実施形態は全
て、老化防止剤増量材６を最外溝底７の径内側に埋設し
たものである。空気入りタイヤ１は、トレッド部２、ス
チ−ルコ−ド層３、カ−カスコ−ド層４、バンドプライ
５を基本構造として構成されている。ここで、トレッド
部は互いに平行に形成されたセンター溝８とこの外方に
形成されたサイド溝７Ａを形成したリブトレッドパター
ンを有する上層部２ａと下層部２ｂの二層からなる構造
である。また６は本発明で埋設する老化防止剤増量材で
ある。Embodiments of the present invention will be described below with reference to the drawings. In all of the embodiments shown in FIGS. 1 to 8, the antioxidant extender 6 is embedded inside the outermost groove bottom 7 radially inward. The pneumatic tire 1 has a basic structure including a tread portion 2, a steel cord layer 3, a carcass cord layer 4, and a band ply 5. Here, the tread portion has a two-layer structure including an upper layer portion 2a and a lower layer portion 2b having a rib tread pattern in which a center groove 8 formed parallel to each other and a side groove 7A formed outside the center groove 8 are formed. Reference numeral 6 denotes an antioxidant filler to be embedded in the present invention.
【００１０】本発明における老化防止剤増量材６は、主
にトレッド最外溝７Ａの底である最外溝底７に効果的に
老化防止剤を供給することが目的である。最外溝底７は
トレッド２の最も幅方向外側で、ショルダー部と近接す
る位置にあり、タイヤの挙動によって最も亀裂が発生し
易い部位であることから、前記増量材６は最外溝底７の
径内側でかつ周方向全周にわたり埋設されることが必要
である。The purpose of the antioxidant extender 6 in the present invention is to supply an antioxidant mainly to the outermost groove bottom 7, which is the bottom of the outermost tread groove 7A. The outermost groove bottom 7 is the outermost part in the width direction of the tread 2 and is located at a position close to the shoulder portion, and is a portion where cracks are most likely to occur due to the behavior of the tire. It is necessary to be buried on the inside of the diameter and over the entire circumference in the circumferential direction.
【００１１】老化防止剤は低含有量の領域に移行する性
質を有することから、最外溝底７の径内側でかつ周方向
全周にわたり老化防止剤増量材６を埋設することで、他
のタイヤ構成部材の老化防止剤が減少しても、前記老化
防止剤増量材６から補給できる。しかも断面乃至容積が
大きな各構成部材（トレッド等）にそれぞれ老化防止剤
を増量するより、前記増量材６にのみ通常の配合量の２
〜３倍量を配合するほうが全体の老化防止剤の使用量は
抑えられ、低コストになる。Since the anti-aging agent has a property of shifting to a low content region, the anti-aging agent increasing material 6 is embedded inside the outermost groove bottom 7 and over the entire circumference in the circumferential direction, so that other anti-aging agents can be embedded. Even if the antioxidant in the tire component decreases, it can be supplied from the antioxidant extender 6. Further, since the antioxidant is added to each of the constituent members (tread and the like) having a large cross section or volume, the usual compounding amount of only the filler 6 is used.
When the amount is 3 to 3 times, the total amount of the antioxidant used is suppressed and the cost is reduced.
【００１２】前記老化防止剤増量材６は厚さ約１．５ｍ
ｍ、幅約２０ｍｍのシート状のゴム組成物で、通常の配
合量の２〜３倍の４〜６重量％の老化防止剤を配合す
る。４重量％以下では老化防止剤補給の効果が少なく、
６重量％以上になると高コストである。該ゴム組成物の
老化防止剤以外の組成成分は、例えばトレッド部などの
他のタイヤ構成部材のゴム組成と同様である。老化防止
剤として使用するのは、例えばＮ−フェニル−Ｎ’−
（１，３ジメチルブチル）−ｐ−フェニレンジアミン、
Ｎ−フェニル−Ｎ’−イソプロピル−ｐ−フェニレンジ
アミン等のアミン系老化防止剤である。The antioxidant filler 6 has a thickness of about 1.5 m.
m, a sheet-like rubber composition having a width of about 20 mm, containing 4 to 6% by weight of an antioxidant, which is 2 to 3 times the usual compounding amount. If the content is less than 4% by weight, the effect of supplementing the anti-aging agent is small,
When the content is 6% by weight or more, the cost is high. The composition components of the rubber composition other than the anti-aging agent are the same as the rubber composition of other tire components such as a tread portion. For example, N-phenyl-N′-
(1,3 dimethylbutyl) -p-phenylenediamine,
It is an amine antioxidant such as N-phenyl-N'-isopropyl-p-phenylenediamine.
【００１３】図１は本発明の第１実施例であり、老化防
止剤増量材６を、最外溝底７の径内側であるトレッド上
層部２ａとトレッド下層部２ｂの間に埋設したタイヤの
全体断面図である。線Ｏ−Ｏはタイヤの赤道線である。
図２は本発明の第２実施例で、該増量材６を最外溝底７
の径内側であるトレッド下層部２ｂの下面に埋設したタ
イヤの断面図の、図１におけるＯ−Ｏ線から右側を示し
たものである。線Ｏ−Ｏから左側にも、本図と同様の構
造が存在する。以下図３〜図９にも、線Ｏ−Ｏから右側
の断面図を示すが、線Ｏ−Ｏから左側にもそれぞれ同様
の構造が存在する。FIG. 1 shows a first embodiment of the present invention, in which a tire in which an antioxidant filler 6 is embedded between a tread upper layer 2a and a tread lower layer 2b, which is radially inside the outermost groove bottom 7, is used. It is a whole sectional view. Line OO is the equator line of the tire.
FIG. 2 shows a second embodiment of the present invention.
FIG. 2 is a cross-sectional view of the tire embedded on the lower surface of the tread lower layer portion 2b on the inner side of the right side of FIG. On the left side of the line OO, there is a structure similar to that shown in FIG. 3 to 9 also show sectional views on the right side from the line OO, but similar structures exist on the left side from the line OO.
【００１４】図３は本発明第３実施例である。該増量材
６を各タイヤ構成層間でなく、各構成層内部に埋設して
も何ら差し支えはない。図３ではトレッド上層内部に埋
設しているが当該箇所に限定されるものではなく、例え
ばトレッド下層内部であっても構わない。図４は本発明
第４実施例で該増量材６をバンドプライ５の外周側に、
図５は本発明第５実施例で、該増量材６をバンドプライ
内周側に埋設した実施例である。FIG. 3 shows a third embodiment of the present invention. There is no problem if the filler 6 is embedded not in each tire constituent layer but in each constituent layer. In FIG. 3, it is buried inside the tread upper layer, but is not limited to this location. For example, it may be inside the tread lower layer. FIG. 4 shows the fourth embodiment of the present invention,
FIG. 5 shows a fifth embodiment of the present invention, in which the filler 6 is buried on the inner peripheral side of the band ply.
【００１５】上記実施例はすべて、前記増量材６の左右
各一本を周方向全周にわたって埋設するものであるが、
該増量材を図６で示すように併設すれば広範囲に老化防
止剤を供給できる（第６実施例）。また、特に老化が激
しい箇所があれば、該当箇所の径内側に図７で示すよう
に前記増量材６を径方向で積層して埋設すればよい（第
７実施例）。このように老化防止剤増量材６を多本数埋
設することで、貯蔵できる老化防止剤の量やその配分を
調節することができる。In all of the above embodiments, one of the right and left extending members 6 is embedded over the entire circumference in the circumferential direction.
If the extender is additionally provided as shown in FIG. 6, an antioxidant can be supplied over a wide range (sixth embodiment). In addition, if there is a part where aging is particularly severe, the extending material 6 may be laminated and buried radially inside the corresponding part as shown in FIG. 7 (seventh embodiment). By embedding a large number of the antioxidant extenders 6 in this manner, the amount of the antioxidant that can be stored and the distribution thereof can be adjusted.
【００１６】この際の老化防止剤増量材６の埋設は一箇
所でもよいが、図１〜７に例示した各埋設箇所を適宜組
み合わせて、複数箇所にしてもよい。図８は本発明第８
実施例である。図８にはトレッド上層部と下層部の間
と、バンドプライの外周側の二箇所に埋設する例を示し
ているが、本例に限定されることはなく、適宜選択して
組み合わせればよい。At this time, the antioxidant extender 6 may be buried in one place, but may be buried in a plurality of places by appropriately combining the buried places illustrated in FIGS. FIG. 8 shows the eighth embodiment of the present invention.
This is an example. FIG. 8 shows an example of embedding between the upper layer portion and the lower layer portion of the tread and two places on the outer peripheral side of the band ply. .
【００１７】図９に示した本発明第９実施例は、バンド
プライ５を構成するゴム層に前記老化防止剤を４〜６重
量％配合したものである。つまりバンドプライ５が前記
老化防止剤増量材６である場合である。図１〜図８に示
すように、バンドプライはベルト層のリフティング現象
を抑えるため、ショルダー部近傍の径内側において、タ
イヤにタガをかけるような構造をとって埋設されてい
る。In the ninth embodiment of the present invention shown in FIG. 9, the rubber layer constituting the band ply 5 contains 4 to 6% by weight of the antioxidant. That is, this is the case where the band ply 5 is the antioxidant extender 6. As shown in FIGS. 1 to 8, the band ply is buried in a radially inner portion near the shoulder portion in such a manner that the tire is loosened in order to suppress the lifting phenomenon of the belt layer.
【００１８】前記老化防止剤増量材６の埋設箇所である
最外溝底７の径内側に近接し、タイヤの構成において占
めるバンドプライ５の容積がトレッドゴムと比較して遥
かに小さい。以上の点より、バンドプライ５への老化防
止剤の増量は、前述の老化防止剤増量材６を埋設する方
法と同様の効果が得られる。老化防止剤増量材６の埋設
部位は上記実施例に限定されるものではない。最外溝底
近傍に形成された他の溝底に亀裂が多発するならば、該
溝底の径内側でかつ周方向全周に埋設しても構わない。
なお図ではトレッドパターンはリブパターンとして示し
ているが、ブロックパターン又はリブ・ブロックパター
ンであっても構わない。このブロックパターン及びリブ
・ブロックパターンときには、前記最外溝底とは、トレ
ッド部の左右両外側域に形成される縦・横溝の底を含む
ものである。[0021] The volume of the band ply 5 occupying the tire structure is much smaller than that of the tread rubber, which is close to the inner side of the outermost groove bottom 7 where the antioxidant filler 6 is embedded. From the above points, increasing the amount of the antioxidant in the band ply 5 has the same effect as that of the method of embedding the antioxidant extender 6 described above. The embedding site of the antioxidant extender 6 is not limited to the above embodiment. If cracks frequently occur in the other groove bottom formed near the outermost groove bottom, the groove may be buried inside the diameter of the groove bottom and along the entire circumference in the circumferential direction.
Although the tread pattern is shown as a rib pattern in the figure, it may be a block pattern or a rib / block pattern. In the block pattern and the rib / block pattern, the outermost groove bottom includes the bottoms of vertical and horizontal grooves formed on both left and right outer regions of the tread portion.
【００１９】[0019]
【発明の効果】本発明の空気入りタイヤは、老化防止剤
増量材をトレッドの最外溝底の径内側に埋設して老化防
止剤を補給することにより、トレッドゴムの茶変を招く
ことなく老化を防止できる。またバンドプライに老化防
止剤を増量することでも同様の効果が得られる。従っ
て、美観を損なうことなくトレッドの最外溝底近傍に亀
裂が発生することを防ぐことができる。According to the pneumatic tire of the present invention, the antioxidant filler is buried inside the outermost groove bottom of the tread to supply the antioxidant, thereby preventing the tread rubber from becoming brown. Aging can be prevented. The same effect can be obtained by increasing the amount of the antioxidant in the band ply. Therefore, it is possible to prevent a crack from being generated near the bottom of the outermost groove of the tread without deteriorating the appearance.
【図１】本発明の第一実施例であり、タイヤ全体の断面
図である。FIG. 1 is a first embodiment of the present invention and is a cross-sectional view of an entire tire.
【図２】本発明の第二実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 2 is a second embodiment of the present invention, showing a right side from a line OO of a cross-sectional view of the entire tire.
【図３】本発明の第三実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 3 is a third embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
【図４】本発明の第四実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 4 is a fourth embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
【図５】本発明の第五実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 5 is a fifth embodiment of the present invention, showing a right side from a line OO of a cross-sectional view of the entire tire.
【図６】本発明の第六実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 6 is a sixth embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
【図７】本発明の第七実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 7 is a seventh embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
【図８】本発明の第八実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 8 is an eighth embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
【図９】本発明ノ第九実施例であり、タイヤ全体の断面
図のＯ−Ｏ線から右側を示したものである。FIG. 9 is a ninth embodiment of the present invention, showing a right side from a line OO in a cross-sectional view of the entire tire.
１ タイヤ ２ トレッド部 ２ａ トレッド上層部 ２ｂ トレッド下層部 ３ スチールコード層 ４ カーカスコード層 ５ バンドプライ ６ 老化防止剤増量材 Reference Signs List 1 tire 2 tread portion 2a tread upper layer portion 2b tread lower layer portion 3 steel cord layer 4 carcass cord layer 5 band ply 6 anti-aging agent increasing material
Claims (3)
径内側でかつ周方向全周にわたり老化防止剤増量材を埋
設したことを特徴とする空気入りタイヤ。1. A pneumatic tire having an antioxidant increasing material embedded at least radially inside the bottom of the outermost groove of the tire tread and over the entire circumference.
老化防止剤を配合したゴム組成物であることを特徴とす
る請求項１に記載の空気入りタイヤ。2. The pneumatic tire according to claim 1, wherein the antioxidant extender is a rubber composition containing 4 to 6% by weight of an antioxidant.
あることを特徴とする請求項１または２に記載の空気入
りタイヤ。3. The pneumatic tire according to claim 1, wherein the antioxidant extender is a band ply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10078009A JPH11278008A (en) | 1998-03-25 | 1998-03-25 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10078009A JPH11278008A (en) | 1998-03-25 | 1998-03-25 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11278008A true JPH11278008A (en) | 1999-10-12 |
Family
ID=13649802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10078009A Pending JPH11278008A (en) | 1998-03-25 | 1998-03-25 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11278008A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100493658B1 (en) * | 2000-11-23 | 2005-06-03 | 한국타이어 주식회사 | Pneumatic vehicle tire |
| US7082976B2 (en) * | 2001-12-11 | 2006-08-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire having tread portion formed of two layers |
| WO2009029114A1 (en) * | 2007-08-31 | 2009-03-05 | Societe De Technologie Michelin | Tread with antidegradant reservoir |
| JP2015116838A (en) * | 2013-12-16 | 2015-06-25 | 東洋ゴム工業株式会社 | Pneumatic tire |
| WO2020250996A1 (en) * | 2019-06-13 | 2020-12-17 | 株式会社ブリヂストン | Antiaging-agent-supplying composition, antiaging-agent-supplying material, and method for supplying antiaging agent |
-
1998
- 1998-03-25 JP JP10078009A patent/JPH11278008A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100493658B1 (en) * | 2000-11-23 | 2005-06-03 | 한국타이어 주식회사 | Pneumatic vehicle tire |
| US7082976B2 (en) * | 2001-12-11 | 2006-08-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire having tread portion formed of two layers |
| WO2009029114A1 (en) * | 2007-08-31 | 2009-03-05 | Societe De Technologie Michelin | Tread with antidegradant reservoir |
| EP2197694A1 (en) * | 2007-08-31 | 2010-06-23 | Société de Technologie MICHELIN | Tread with antidegradant reservoir |
| JP2010537876A (en) * | 2007-08-31 | 2010-12-09 | ソシエテ ド テクノロジー ミシュラン | Tread with anti-degradation reservoir |
| EP2197694A4 (en) * | 2007-08-31 | 2011-08-31 | Michelin Soc Tech | Tread with antidegradant reservoir |
| US20120097302A1 (en) * | 2007-08-31 | 2012-04-26 | Hetzel Peter D | Tread with Antidegradant Reservoir |
| JP2015116838A (en) * | 2013-12-16 | 2015-06-25 | 東洋ゴム工業株式会社 | Pneumatic tire |
| WO2020250996A1 (en) * | 2019-06-13 | 2020-12-17 | 株式会社ブリヂストン | Antiaging-agent-supplying composition, antiaging-agent-supplying material, and method for supplying antiaging agent |
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