JPH1058914A - Antistatic tire - Google Patents
Antistatic tireInfo
- Publication number
- JPH1058914A JPH1058914A JP9146447A JP14644797A JPH1058914A JP H1058914 A JPH1058914 A JP H1058914A JP 9146447 A JP9146447 A JP 9146447A JP 14644797 A JP14644797 A JP 14644797A JP H1058914 A JPH1058914 A JP H1058914A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- tire
- sheet
- rubber
- resistance value
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、帯電防止タイヤに
関する。[0001] The present invention relates to an antistatic tire.
【０００２】[0002]
【従来の技術】一般にシリカなどの充填剤を用いたタイ
ヤトレッドゴムは、その絶縁性（１０ 10〜１０12Ω・ｃ
ｍの固有抵抗値）のために、車体で発生した電荷を地面
にリークすることができない。そこで、車体で発生した
静電気を地面等に放電するために、高シリカ配合のトレ
ッドゴムのセンター部に高カーボンブラック配合のゴム
シートを設けたものがある。しかし、この方法による
と、成型時の煩雑さ、ショルダー部との接着性および偏
摩耗性など新たな不都合が生じている。2. Description of the Related Art Generally, a tie using a filler such as silica is used.
Yatread rubber has its insulating properties (10 Ten-1012Ω ・ c
m), the charge generated by the vehicle body is transferred to the ground
Can not be leaked. So it happened in the car body
In order to discharge static electricity to the ground, etc.
Rubber with high carbon black compound at the center of pad rubber
Some have a sheet. But this way
And the complexity of molding, the adhesion to the shoulder
New inconveniences such as abrasion have occurred.
【０００３】[0003]
【発明が解決しようとする課題】そこで、本発明は、高
シリカ配合のトレッドゴムを有するタイヤの諸特性を損
なうことなく、さらに上記不都合を解決した帯電防止タ
イヤを提供することを目的とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an antistatic tire which has solved the above-mentioned disadvantages without impairing various characteristics of a tire having a tread rubber containing high silica.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、以下の構成とする。 （１）導電性の低いゴム組成物で構成されたトレッドの
周上の少なくとも１か所に、幅方向にトレッド表面から
トレッド底面まで延在する固有抵抗値が１０6 Ω・ｃｍ
以下の導電性の高いシートを介在させたトレッドゴムを
有することを特徴とする。 （２）前記シートがトレッドの接合部に介在されること
を特徴とする。 （３）前記シートのタイヤ周方向の幅が０．５ｍｍ〜５
０ｍｍであることを特徴とする。In order to achieve the above object, the present invention has the following arrangement. (1) A specific resistance value extending from the tread surface to the tread bottom surface in the width direction at at least one location on the circumference of the tread made of the rubber composition having low conductivity is 10 6 Ω · cm.
It is characterized by having tread rubber with the following highly conductive sheet interposed. (2) The seat is interposed at a tread joint. (3) The width of the sheet in the tire circumferential direction is 0.5 mm to 5 mm.
0 mm.
【０００５】[0005]
【発明の実施の形態】以下に本発明をより詳細に説明す
る。本発明にかかるゴムシートは、成型時にトレッド接
合部に挟むだけの場合は、成型時の煩雑さを回避するこ
とができる。また、かかるシートは、タイヤトレッドの
一部に在るだけなので、タイヤのユニフォーミティの低
下もなく、その他の諸特性を損なうことがない。さら
に、高シリカ配合のトレッドゴム組成物とポリマー種、
添加剤種等を同じくした場合には、接着性もより良好と
なる。また、本発明にかかるシートのタイヤ周方向の幅
が０．５ｍｍ未満では、電位を緩和できる程には充分に
リークすることができず、また、５０ｍｍ超過では、接
地面が前記シートのみになる場合があり、その時のウェ
ット性能が１０〜１５％低下し、好ましくない。なお、
トレッドが、キャップトレッドとベーストレッドの２重
構造の場合であって、キャップトレッドのみが、低導電
性ゴムの場合は、キャップトレッドの接合部に、当該シ
ートを挟めばよいことはいうまでもない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. When the rubber sheet according to the present invention is merely sandwiched between the tread joints at the time of molding, the complexity at the time of molding can be avoided. Further, since such a sheet is present only in a part of the tire tread, the uniformity of the tire is not reduced, and other characteristics are not impaired. In addition, tread rubber composition and polymer species of high silica blend,
When the kind of the additive is the same, the adhesiveness is further improved. Further, if the width of the sheet according to the present invention in the circumferential direction of the tire is less than 0.5 mm, it is not possible to leak sufficiently to reduce the potential, and if it is more than 50 mm, the contact surface is only the sheet. In some cases, the wet performance at that time is reduced by 10 to 15%, which is not preferable. In addition,
When the tread has a double structure of a cap tread and a base tread, and only the cap tread is made of low conductive rubber, it goes without saying that the sheet may be sandwiched between the joints of the cap tread. .
【０００６】[0006]
【実施例】以下に、本発明を実施例に基づいて説明す
る。本発明の帯電防止タイヤのトレッドゴムおよびゴム
シートは、それぞれ表１記載の配合に従って構成され、
下記の方法により測定された各々のゴムの固有抵抗値も
同じく表１中に示す。タイヤのサイズは、１５５ＳＲ１
３であり、タイヤの接合部に介在された場合の部分断面
図は、図１に示す通りである。なお、図中、１はシー
ト、２はトレッド表面、３はトレッド底面、４はベース
ゴムである。また、新品時と４００００ｋｍドラム走行
後のタイヤにつき、タイヤの電気抵抗値を測定し、その
測定値をシート厚さ毎に表２に示す。 （１）固有抵抗値の測定法 円盤形状のサンプルを作製し、半径：ｒ＝２．５ｃｍ、
厚さ：ｔ＝０．２ｃｍの部分の電気抵抗値Ｒを、図２に
示すアドバンス社製絶縁抵抗試験箱を用いて測定し、次
式により固有抵抗値ρを計算した。なお、図中、１１は
サンプル、１２は主電極、１３はガード電極、１４は対
電極である。 ρ＝（πｒ2 ／ｔ）Ｒ （２）電気抵抗値の測定法 GERMAN ASSOCIATION OF RUBBER INDUSTRY のＷｄＫ １
１０ シート３に準拠して、ヒュレットパッカード（HE
WLETTPACKARD）社製モデルＨＰ４３３９Ａのハイレジス
タンスメーターを使用し、図３のようにして測定した。
図中、２１はタイヤ、２２は鋼板、２３は絶縁板、２４
は前記ハイレジスタンスメーターであり、絶縁板２３上
の鋼板２２とタイヤ２１のリムとの間に電流を流し、比
較例１と実施例１〜３は１０００Ｖにて測定し、実施例
４〜７は１００Ｖにて測定した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. The tread rubber and the rubber sheet of the antistatic tire of the present invention are each constituted according to the composition shown in Table 1,
Table 1 also shows the specific resistance of each rubber measured by the following method. Tire size is 155SR1
3, and a partial cross-sectional view in the case of being interposed at the joint portion of the tire is as shown in FIG. In the drawings, 1 is a sheet, 2 is a tread surface, 3 is a tread bottom surface, and 4 is a base rubber. In addition, the electric resistance value of the tire when it was new and after running the drum for 40000 km was measured, and the measured value is shown in Table 2 for each sheet thickness. (1) Measurement method of specific resistance value A disk-shaped sample was prepared, and the radius was r = 2.5 cm.
The electrical resistance value R at the portion where the thickness is t = 0.2 cm was measured using an insulation resistance test box manufactured by Advance Corporation shown in FIG. 2, and the specific resistance value ρ was calculated by the following equation. In the figure, 11 is a sample, 12 is a main electrode, 13 is a guard electrode, and 14 is a counter electrode. ρ = (πr 2 / t) R (2) Measurement method of electric resistance WdK 1 of GERMAN ASSOCIATION OF RUBBER INDUSTRY
10 In accordance with Sheet 3, a Hewlett Packard (HE
The measurement was performed as shown in FIG. 3 using a high resistance meter of model HP4339A manufactured by WLETTPACKARD).
In the figure, 21 is a tire, 22 is a steel plate, 23 is an insulating plate, 24
Is the high resistance meter, and an electric current is applied between the steel plate 22 on the insulating plate 23 and the rim of the tire 21. Comparative Example 1 and Examples 1 to 3 are measured at 1000 V, and Examples 4 to 7 are It was measured at 100V.
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【表２】 [Table 2]
【０００９】[0009]
【発明の効果】以上説明した通り、本発明によると、タ
イヤのウェット性、耐摩耗性等の本来的なタイヤ諸特性
を損なうことなく、成型性等を改善することができる。As described above, according to the present invention, moldability and the like can be improved without impairing the essential tire characteristics such as wettability and wear resistance of the tire.
【図１】本発明にかかるタイヤにおけるシート付近の断
面図である。FIG. 1 is a sectional view of the vicinity of a seat in a tire according to the present invention.
【図２】円盤形状サンプルの電気抵抗値Ｒの測定法を示
す模式図である。FIG. 2 is a schematic diagram showing a method for measuring an electric resistance value R of a disk-shaped sample.
【図３】タイヤの電気抵抗値の測定法を示す模式図であ
る。FIG. 3 is a schematic diagram showing a method for measuring an electric resistance value of a tire.
１ シート ２ トレッド表面 ３ トレッド底面 1 Sheet 2 Tread surface 3 Tread bottom
Claims (3)
レッドの周上の少なくとも１か所に、幅方向にトレッド
表面からトレッド底面まで延在する固有抵抗値が１０6
Ω・ｃｍ以下の導電性の高いシートを介在させたトレッ
ドゴムを有することを特徴とする帯電防止タイヤ。1. A specific resistance value extending from the tread surface to the tread bottom surface in the width direction is 10 6 at at least one location on the circumference of the tread made of the rubber composition having low conductivity.
An antistatic tire comprising a tread rubber in which a highly conductive sheet of Ω · cm or less is interposed.
れることを特徴とする請求項１記載の帯電防止タイヤ。2. The antistatic tire according to claim 1, wherein said sheet is interposed at a tread joint.
ｍｍ〜５０ｍｍであることを特徴とする請求項１または
２記載の帯電防止タイヤ。3. The width of the seat in the tire circumferential direction is 0.5.
The antistatic tire according to claim 1, wherein the diameter is from mm to 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14644797A JP3579212B2 (en) | 1996-06-14 | 1997-06-04 | Antistatic tire |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8-154031 | 1996-06-14 | ||
| JP15403196 | 1996-06-14 | ||
| JP14644797A JP3579212B2 (en) | 1996-06-14 | 1997-06-04 | Antistatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1058914A true JPH1058914A (en) | 1998-03-03 |
| JP3579212B2 JP3579212B2 (en) | 2004-10-20 |
Family
ID=26477285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14644797A Expired - Lifetime JP3579212B2 (en) | 1996-06-14 | 1997-06-04 | Antistatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3579212B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006317380A (en) * | 2005-05-16 | 2006-11-24 | Bridgestone Corp | Electric resistance measuring system for tire and its method |
| WO2011045944A1 (en) | 2009-10-15 | 2011-04-21 | 株式会社ブリヂストン | Rubber composition for tire tread and pneumatic tire |
| JP2013216115A (en) * | 2012-04-04 | 2013-10-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire and method for manufacturing the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6759703B2 (en) * | 2016-05-19 | 2020-09-23 | 住友ゴム工業株式会社 | Pneumatic tires and their manufacturing methods |
-
1997
- 1997-06-04 JP JP14644797A patent/JP3579212B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006317380A (en) * | 2005-05-16 | 2006-11-24 | Bridgestone Corp | Electric resistance measuring system for tire and its method |
| WO2011045944A1 (en) | 2009-10-15 | 2011-04-21 | 株式会社ブリヂストン | Rubber composition for tire tread and pneumatic tire |
| US9006335B2 (en) | 2009-10-15 | 2015-04-14 | Bridgestone Corporation | Rubber composition for tire tread and pneumatic tire |
| JP2013216115A (en) * | 2012-04-04 | 2013-10-24 | Yokohama Rubber Co Ltd:The | Pneumatic tire and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3579212B2 (en) | 2004-10-20 |
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