JPH0819267B2 - Road roller tires - Google Patents
Road roller tiresInfo
- Publication number
- JPH0819267B2 JPH0819267B2 JP1062295A JP6229589A JPH0819267B2 JP H0819267 B2 JPH0819267 B2 JP H0819267B2 JP 1062295 A JP1062295 A JP 1062295A JP 6229589 A JP6229589 A JP 6229589A JP H0819267 B2 JPH0819267 B2 JP H0819267B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- weight
- road roller
- tire
- parts
- 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 - Lifetime
Links
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、耐油膨潤性及び外観性が著しく向上したロ
ードローラー用タイヤに関するものである。Description: TECHNICAL FIELD The present invention relates to a road roller tire having significantly improved oil swelling resistance and appearance.
（従来の技術） ロードローラー用タイヤでは路面整地時に石等により
トレッド部に外傷を受け外観を損ねたり、アスファルト
舗装時にはタイヤへのアスファルト付着防止の為軽油等
が散布されトレッド部乃至サイド部が油膨潤し転圧不均
一をもたらし作業を困難にする場合が多々ある。従っ
て、ロードローラー用タイヤのトレッド部乃至サイド部
には、その品質として耐油膨潤性と外観性とが要求され
る。(Prior art) For road roller tires, the tread portion is damaged by stones etc. when the road surface is leveled, and the appearance is damaged, and light oil is sprayed to prevent the asphalt from adhering to the tire during asphalt paving, and the tread portion or side portions are oiled. In many cases, swelling causes uneven rolling and makes work difficult. Therefore, the tread portion or side portion of the road roller tire is required to have oil swelling resistance and appearance as its quality.
特に、トレッド部の油膨潤は、トレッドが油膨潤する
ことで踏面部の形状が変化し、転圧時の不均一化をもた
らし、踏面平滑作業を困難にするという問題が生じる。
また、トレッド部の大きな外傷は直接タイヤケース部を
損傷させ廃品化させるばかりでなく、小さな外傷でも上
記油膨潤により外傷がさらに成長し、ケース損傷を促進
させることになる。In particular, the oil swelling of the tread portion causes a problem that the tread shape changes due to the oil swelling of the tread, resulting in non-uniformity at the time of rolling and making the tread smoothing work difficult.
Further, not only a large injury on the tread portion directly damages the tire case portion to make it into a waste product, but also a small injury causes the injury to grow further due to the oil swelling and accelerates the case damage.
このため従来から、ロードローラー用タイヤのトレッ
ド部に適用するゴムとしては、油膨潤を低減させる為
に、ゴム成分として汎用ゴムの中でも比較的耐油膨潤性
の良好な一般のスチレン−ブタジエン共重合体ゴム（例
えば日本合成ゴム（株）製、商品名SBR＃1500）を適用
するか、あるいはさらにゴムを硬くする為にゴムの網目
密度を上げ、耐油膨潤性を改良することが良く知られて
いた。Therefore, conventionally, as a rubber applied to the tread portion of a tire for a road roller, a general styrene-butadiene copolymer having a relatively good oil swelling resistance among general-purpose rubbers as a rubber component in order to reduce oil swelling. It was well known that rubber (for example, SBR # 1500 manufactured by Nippon Synthetic Rubber Co., Ltd.) was applied, or that the mesh density of the rubber was increased to further harden the rubber to improve oil swelling resistance. .
（発明が解決しようとする課題） しかし、一般のスチレン−ブタジエン共重合体ゴムで
は耐油膨潤性の改良効果が小さく、またゴムを硬くする
為にゴムの網目密度を上げることは外傷による外観性を
著しく低下せしめる為好ましくない。(Problems to be Solved by the Invention) However, in a general styrene-butadiene copolymer rubber, the effect of improving the oil swelling resistance is small, and increasing the network density of the rubber to make the rubber harder increases the appearance due to external damage. It is not preferable because it significantly decreases.
結局、従来は両者の妥協点で、ロードローラー用タイ
ヤのトレッドゴム乃至サイドゴムを作らざるを得なかっ
た。After all, in the past, the tread rubber and the side rubber of the road roller tire had to be manufactured at a compromise point between the two.
そこで本発明の目的は、耐油膨潤性及び外観性共に改
善されたロードローラー用タイヤを提供することにあ
る。Therefore, an object of the present invention is to provide a road roller tire having improved oil swelling resistance and appearance.
（課題を解決するための手段） 本発明者らは、ロードローラー用タイヤに課せられた
上記課題の解決に向って鋭意研究を行なった結果、ゴム
成分の特定組成と特定のカーボンブラック及びプロセス
オイル又は樹脂とを組合せたゴム組成物でロードローラ
ー用タイヤのトレッド部乃至サイド部を形成することに
より耐油膨潤性と外観性を著しく向上させ得ることを見
出し、本発明を完成するに至った。(Means for Solving the Problems) The inventors of the present invention have conducted diligent research to solve the above problems imposed on road roller tires, and as a result, have a specific composition of a rubber component, a specific carbon black, and a process oil. Further, they have found that the oil swelling resistance and the appearance can be remarkably improved by forming the tread portion or the side portion of the road roller tire with a rubber composition in which a resin is combined, and have completed the present invention.
すなわち、本発明のロードローラー用タイヤは、ゴム
成分がスチレン−ブタジエン共重合体ゴム単独か、又は
少なくとも60重量％以上のスチレン−ブタジエン共重合
体ゴムと他のジエン系ゴムとから成り、かつ全ゴム成分
中の総スチレン含量が25〜60重量％からなるゴム成分10
0重量部に対し、窒素吸着比表面積（N2SA）60〜150m2/g
及びジブチルフタレート吸収量（DBP）70〜160ml/100g
を有するカーボンブラック40〜90重量部と、プロセスオ
イル又は軟化剤（樹脂）５〜50重量部とを配合してなる
ゴム組成物をトレッド部及びサイド部に配置したことを
特徴とする。That is, the tire for a road roller of the present invention has a rubber component consisting of a styrene-butadiene copolymer rubber alone or at least 60% by weight or more of a styrene-butadiene copolymer rubber and another diene rubber, and Rubber component 10 with a total styrene content of 25-60 wt%
Nitrogen adsorption specific surface area (N 2 SA) 60 to 150 m 2 / g per 0 part by weight
And dibutyl phthalate absorption (DBP) 70-160ml / 100g
The rubber composition comprising 40 to 90 parts by weight of the carbon black having the above and 5 to 50 parts by weight of the process oil or the softening agent (resin) is arranged in the tread portion and the side portion.
（作 用） 本発明に係るゴム組成物のゴム成分として、スチレン
−ブタジエン共重合体ゴムを60〜100重量部配合し、か
つ全ゴム成分中の総スチレン含量が25〜60重量％である
ことを要するのは、かかる条件においてのみ耐油膨潤性
と外観性の両立が可能となるからである。すなわち、総
スチレン含量が25重量％未満もしくはスチレン−ブタジ
エン共重合体ゴムの配合量が60重量部未満では耐油膨潤
性の改良効果が少なく、一方スチレン含量が60重量％を
超えると加工性、成型作業性が悪くなり、工場生産性を
大きく阻害することになる。(Operation) 60 to 100 parts by weight of styrene-butadiene copolymer rubber is blended as a rubber component of the rubber composition according to the present invention, and the total styrene content in all rubber components is 25 to 60% by weight. The reason is that the oil swelling resistance and the appearance are compatible only under such conditions. That is, if the total styrene content is less than 25% by weight or the compounding amount of styrene-butadiene copolymer rubber is less than 60 parts by weight, the effect of improving oil swelling resistance is small, while if the styrene content exceeds 60% by weight, workability and molding are improved. The workability will be deteriorated and the productivity of the factory will be greatly impaired.
また、ゴム組成物中のゴム成分の体積分率を低くする
ことは、耐油膨潤性にとって良好である。このため、充
填補強剤としてのカーボンブラックとして、N2SAが60〜
150m2/g、好ましくは80〜130m2/g、DBPが70〜160ml/100
g、好ましくは90〜140ml/100gのハードカーボンブラッ
クをゴム成分100重量部に対し、40〜90重量部、好まし
くは50〜80重量部添加することにより更に耐油膨潤性及
び外観性を向上させることができる。かかるカーボンブ
ラックのN2SAが60m2/g未満かもしくはDBPが70ml/100g未
満の場合にはタイヤの外観性が低下し、一方N2SAが150m
2/gを超えるかもしくはDBPが160ml/100gを超えるとゴム
焦けを生じ易くなり作業性上好ましくない。また、カー
ボンブラックの配合量は40重量部未満では耐油膨潤性と
外観性との両立が得られず、一方90重量部を超えるとゴ
ム焦げを生じ、作業性上好ましくない。Further, lowering the volume fraction of the rubber component in the rubber composition is good for the oil swelling resistance. For this reason, N 2 SA of 60-
150m 2 / g, preferably 80~130m 2 / g, DBP is 70~160ml / 100
To further improve oil swelling resistance and appearance by adding 40 to 90 parts by weight, preferably 50 to 80 parts by weight, to 100 parts by weight of the rubber component of hard carbon black, preferably 90 to 140 ml / 100 g. You can When N 2 SA of such carbon black is less than 60 m 2 / g or DBP is less than 70 ml / 100 g, the appearance of the tire is deteriorated, while N 2 SA is 150 m
If it exceeds 2 / g or the DBP exceeds 160 ml / 100 g, rubber scorching tends to occur, which is not preferable in terms of workability. If the amount of carbon black is less than 40 parts by weight, both oil swelling resistance and appearance cannot be achieved at the same time, whereas if it exceeds 90 parts by weight, rubber scorching occurs, which is not preferable in terms of workability.
更にまた本発明においては、耐油膨潤性の向上を図る
為にプロセスオイル又は軟化剤（樹脂）をゴム成分100
重量部に対し５〜50重量部、好ましくは10〜40重量部添
加することを要する。この添加量が５重量部未満では焦
けを生じ易くなり作業性上好ましくなく、一方50重量部
より多い場合には外観性が低下する。Furthermore, in the present invention, a process oil or a softening agent (resin) is added to the rubber component 100 in order to improve the oil swelling resistance.
It is necessary to add 5 to 50 parts by weight, preferably 10 to 40 parts by weight to the parts by weight. If the addition amount is less than 5 parts by weight, charring tends to occur, which is not preferable in terms of workability, while if it is more than 50 parts by weight, the appearance is deteriorated.
本発明は、上述したゴム成分、カーボンブラック及び
プロセスオイル又は軟化剤の相乗効果によりロードロー
ラー用タイヤの耐油膨潤性と外観性との大幅向上が可能
となる。In the present invention, the synergistic effect of the rubber component, carbon black and process oil or softening agent described above makes it possible to significantly improve the oil swelling resistance and the appearance of the road roller tire.
（実施例） 次に本発明を実施例及び比較例により説明する。(Examples) Next, the present invention will be described with reference to Examples and Comparative Examples.
以下の第１表に示す配合割合（重量部）から成る各ゴ
ム組成物をサイズ750−15のタイヤのトレッド部及びサ
イド部に適用した試作タイヤにつき、耐油膨潤性及び外
観性の評価を行った。耐油膨潤性は、試作タイヤを軽油
中に１ケ月間浸漬させた後の状態で評価し、また外観性
は悪路路面を500km走行させた後の外観で評価した。い
ずれもA,B,C,D,Eの５段階で評価した。得られた結果を
下記の第１表に併記する。The oil swelling resistance and the appearance were evaluated for the trial tires in which each rubber composition having the compounding ratio (parts by weight) shown in Table 1 below was applied to the tread portion and the side portion of the tire of size 750-15. . The oil swelling resistance was evaluated by immersing the trial tire in light oil for one month, and the appearance was evaluated by the appearance after traveling 500 km on a bad road surface. In each case, the evaluation was made in 5 grades of A, B, C, D and E. The results obtained are also shown in Table 1 below.
第１表より、本発明のタイヤは比較例のタイヤに比し
耐油膨潤性及び外観性の両立が図られていることが分か
る。 It can be seen from Table 1 that the tire of the present invention is more compatible with the oil swelling resistance and the appearance than the tire of the comparative example.
（発明の効果） 以上説明してきたように、本発明のロードローラー用
タイヤにおいてはトレッド部及びサイド部に特定のゴム
組成物を配置したことにより、耐油膨潤性及び外観性を
共に向上させることが可能となった。(Effects of the Invention) As described above, in the road roller tire of the present invention, by disposing the specific rubber composition in the tread portion and the side portion, it is possible to improve both the oil swelling resistance and the appearance. It has become possible.
Claims (1)
又は少なくとも60重量％以上のスチレン−ブタジエン共
重合体ゴムと他のジエン系ゴムとから成り、かつ全ゴム
成分中の総スチレン含量が25〜60重量％からなるゴム成
分100重量部に対し、 窒素吸着比表面積（N2SA）60〜150m2/g及びジブチルフ
タレート吸収量（DBP）70〜160ml/100gを有するカーボ
ンブラック40〜90重量部と、 プロセスオイル又は軟化剤（樹脂）５〜50重量部と を配合してなるゴム組成物をトレッド部及びサイド部に
配置したことを特徴とするロードローラー用タイヤ。1. A tire for a road roller, wherein the rubber component is styrene-butadiene copolymer rubber alone,
Or at least 60% by weight or more of a styrene-butadiene copolymer rubber and another diene rubber, and the total styrene content in all rubber components is 25 to 60% by weight. 40 to 90 parts by weight of carbon black having an adsorption specific surface area (N 2 SA) of 60 to 150 m 2 / g and dibutyl phthalate absorption amount (DBP) of 70 to 160 ml / 100 g, and 5 to 50 parts by weight of process oil or softening agent (resin) A tire for a road roller, characterized in that a rubber composition obtained by blending the rubber composition and the rubber composition is arranged in the tread portion and the side portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062295A JPH0819267B2 (en) | 1989-03-16 | 1989-03-16 | Road roller tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062295A JPH0819267B2 (en) | 1989-03-16 | 1989-03-16 | Road roller tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02242835A JPH02242835A (en) | 1990-09-27 |
| JPH0819267B2 true JPH0819267B2 (en) | 1996-02-28 |
Family
ID=13195983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1062295A Expired - Lifetime JPH0819267B2 (en) | 1989-03-16 | 1989-03-16 | Road roller tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819267B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2889456B2 (en) * | 1993-03-25 | 1999-05-10 | 住友ゴム工業株式会社 | Tire for tire roller |
| JPH06328909A (en) * | 1993-05-20 | 1994-11-29 | Sumitomo Rubber Ind Ltd | Oil-resistant tire for tire roller |
| WO2018021118A1 (en) * | 2016-07-29 | 2018-02-01 | 株式会社ブリヂストン | Rubber composition |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58109545A (en) * | 1981-12-24 | 1983-06-29 | Mitsubishi Chem Ind Ltd | Rubber composition |
| JPS59159839A (en) * | 1983-03-03 | 1984-09-10 | Mitsubishi Chem Ind Ltd | Rubber composition |
| JPS60177041A (en) * | 1984-02-23 | 1985-09-11 | Ohtsu Tire & Rubber Co Ltd | Rubber composition for tire tread |
-
1989
- 1989-03-16 JP JP1062295A patent/JPH0819267B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02242835A (en) | 1990-09-27 |
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