JPS6213205B2 - - Google Patents
Info
- Publication number
- JPS6213205B2 JPS6213205B2 JP56103607A JP10360781A JPS6213205B2 JP S6213205 B2 JPS6213205 B2 JP S6213205B2 JP 56103607 A JP56103607 A JP 56103607A JP 10360781 A JP10360781 A JP 10360781A JP S6213205 B2 JPS6213205 B2 JP S6213205B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- bead base
- rubber
- porous sheet
- sheet
- 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
Links
- 239000011324 bead Substances 0.000 claims description 28
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 24
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 24
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XSQHUYDRSDBCHN-UHFFFAOYSA-N 2,3-dimethyl-2-propan-2-ylbutanenitrile Chemical compound CC(C)C(C)(C#N)C(C)C XSQHUYDRSDBCHN-UHFFFAOYSA-N 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Description
【発明の詳細な説明】
本発明は、特にリム組み時の嵌合を容易にする
ために工夫したタイヤに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a tire that is designed to facilitate fitting when assembling a rim.
従来、タイヤをリム組みする場合、タイヤのビ
ードベース部のすべり摩擦係数が大きいために、
無理な力がかかり、ビードベース部を破損してエ
アリークを生じる恐れがある。また、高圧で無理
に嵌合させようとすると事故につながることもあ
り危検である。 Conventionally, when assembling a tire with a rim, the coefficient of sliding friction at the bead base of the tire is large.
Excessive force may be applied, damaging the bead base and causing an air leak. Additionally, attempting to force fit using high pressure may lead to an accident, so it is a dangerous test.
このため、ビードベース部のすべり摩擦係数を
減少するのに石ケン水やワツクスを塗布すること
があるが、別に塗布材料を必要とする上、塗布工
程の増加でリム組みの作業性が低下する。 For this reason, soapy water or wax is sometimes applied to reduce the coefficient of sliding friction at the bead base, but this requires a separate coating material and increases the number of coating steps, reducing the workability of rim assembly. .
また、石ケン水を塗布すると環境汚染が発生
し、ワツクスを塗布すると油分でタイヤのゴム質
を劣化させることがあつた。 In addition, applying soap and water caused environmental pollution, and applying wax caused oil to deteriorate the quality of the tire's rubber.
本発明は、上記従来の問題点に鑑みてなされた
もので、すべり摩擦係数が非常に小さいポリテト
ラフルオロエチレン多孔質シートを利用して、該
多孔質シートを少なくともビートベース部に固着
し加硫成型することにより、リム組みの嵌合を容
易に行なえるようにしたものである。 The present invention has been made in view of the above-mentioned conventional problems, and utilizes a polytetrafluoroethylene porous sheet with a very small coefficient of sliding friction, fixes the porous sheet to at least the beat base portion, and vulcanizes the porous sheet. By molding, the rim assembly can be easily fitted.
以下、本発明の実施例を添付図面について詳細
に説明する。 Embodiments of the invention will now be described in detail with reference to the accompanying drawings.
第１図に示すように、少なくともリム６のビー
ドシート部１に接するタイヤ２のビードベース部
３に、ポリテトラフルオロエチレン多孔質シート
（以下、PTFE多孔質シートと略記する。）４を固
着する。尚、リム６のフランジ部７に接するタイ
ヤ２のビード部分にも固着することができる。 As shown in FIG. 1, a polytetrafluoroethylene porous sheet (hereinafter abbreviated as PTFE porous sheet) 4 is fixed to at least the bead base portion 3 of the tire 2 that is in contact with the bead seat portion 1 of the rim 6. . Note that it can also be fixed to the bead portion of the tire 2 that is in contact with the flange portion 7 of the rim 6.
PTFEを材料とする多孔質シート４は、材料特
有の耐熱性、耐薬品性の点で極めて優れており、
また摩擦係数が非常に小さいこと及び撥水性を示
すこと等その表面特性の点でも特異な性質を示す
上、多孔性であるという事で非常に柔軟であり、
無孔性のものとは全く異なつた特性を有する。 The porous sheet 4 made of PTFE has extremely excellent heat resistance and chemical resistance, which are unique to the material.
It also has unique surface properties such as a very small coefficient of friction and water repellency, and is extremely flexible due to its porous nature.
It has completely different properties from non-porous materials.
PTFE多孔質シート４としては、繊維と該繊維
によつて互に連結された結節とから成るミクロ構
造を有するものが特に有効である。このPTFE多
孔質シート４を製造するには、特公昭42−13560
号に記載された方法を基本的に用いることができ
る。まず、PTFE未焼結粉末に液状潤滑剤を混和
し、押出し、圧延等によりシート状に成形する。
この成形物から液状潤滑剤を抽出、加熱蒸発等に
より除去し、あるいは除去せずして成形物を少な
くとも一軸方向に延伸する。熱収縮防止状態にて
焼結温度の約327℃以上に加熱して延伸した構造
を焼結固定すると強度の向上したPTFE多孔質シ
ート４が得られる。ここで熱収縮防止状態とは収
縮を完全に防止した状態だけでなく、一部収縮を
許す状態をも含むものとする。このPTFE多孔質
シート４は非常に細い繊維とその繊維により互に
連結された結節とから成るミクロ構造を有してお
り、その繊維径と長さ、結節の大きさやそれらの
数は延伸と焼結の条件により変化させ得るため、
得られる多孔質シート４の孔径と気孔率も自由に
決定し得る。このようなミクロ構造を有する
PTFE多孔質シート４は特に機械的強度の優れた
ものであり、その厚さが80μ程度、孔径が0.1〜
10μ、空隙率が40〜90％（85％程度）の範囲のも
のが特に好適である。空隙率が小さすぎると、多
孔質使用による接着力、変形に強いという特性が
生かせず、大きすぎるとシート貼付けの効果が小
さくなる。 As the PTFE porous sheet 4, one having a microstructure consisting of fibers and nodes interconnected by the fibers is particularly effective. To manufacture this PTFE porous sheet 4,
Basically, the method described in this issue can be used. First, a liquid lubricant is mixed with unsintered PTFE powder, and the mixture is formed into a sheet by extrusion, rolling, etc.
The liquid lubricant is removed from the molded product by extraction, heat evaporation, etc., or the molded product is stretched in at least one axial direction without being removed. A porous PTFE sheet 4 with improved strength can be obtained by sintering and fixing the stretched structure by heating it to a sintering temperature of about 327° C. or higher while preventing heat shrinkage. Here, the state of preventing heat shrinkage includes not only a state where shrinkage is completely prevented, but also a state where some shrinkage is allowed. This PTFE porous sheet 4 has a microstructure consisting of very thin fibers and nodules interconnected by the fibers, and the diameter and length of the fibers, the size of the nodules, and their number are determined by stretching and sintering. Because it can be changed depending on the conditions of
The pore diameter and porosity of the resulting porous sheet 4 can also be determined freely. has such a microstructure
The PTFE porous sheet 4 has particularly excellent mechanical strength, with a thickness of about 80μ and a pore diameter of 0.1 to
10μ and a porosity in the range of 40 to 90% (approximately 85%) is particularly suitable. If the porosity is too small, the properties of adhesive strength and resistance to deformation due to the use of porous materials cannot be utilized, and if the porosity is too large, the effect of sheet attachment will be reduced.
このPTFE多孔質シート４を例えばタイヤ２の
ビードベース部３に接着するには、タイヤ２のビ
ードベース部のゴムと同一又は類似のゴム配合物
の溶液を接着剤として用いるのが適当である。こ
こでゴム配合物とは、ゴムに充填剤、架橋剤、架
橋触媒等を配合したものである。また未架橋のゴ
ムが液状である場合には必ずしも溶液としなくて
もよいことは言うまでもない。接着剤として用い
るゴムの種類は通常タイヤ２のビードベース部の
ゴムと同種のものが採用されるが、接着可能であ
れば他の種類のゴムを用いることもできる。 In order to adhere this PTFE porous sheet 4 to, for example, the bead base portion 3 of the tire 2, it is appropriate to use a solution of a rubber compound that is the same as or similar to the rubber of the bead base portion of the tire 2 as an adhesive. Here, the rubber compound is a mixture of rubber with a filler, a crosslinking agent, a crosslinking catalyst, and the like. Furthermore, it goes without saying that when the uncrosslinked rubber is in a liquid state, it does not necessarily have to be made into a solution. The type of rubber used as the adhesive is usually the same type as the rubber of the bead base of the tire 2, but other types of rubber can also be used as long as they can be bonded.
タイヤ２のビードベース部３とPTFE多孔質シ
ート４を接着するに際してのゴム溶液粘度は、多
孔質シート４の孔径に応じてそれに含浸され易い
状態に調節する。溶液はタイヤ２のビードベース
部３とPTFE多孔質シート４の一方あるいは両方
に塗布する。両者を一体にはり合せた後乾燥し、
架橋させると両者が強固に結合する。この場合、
ゴムがPTFE多孔質シート４の多孔性空間内に入
り込んでそのミクロ繊維構造と一体に結合してい
るため、強固な結合力が得られる。 The viscosity of the rubber solution when bonding the bead base portion 3 of the tire 2 and the PTFE porous sheet 4 is adjusted according to the pore diameter of the porous sheet 4 so that the rubber solution can be easily impregnated into the porous sheet 4. The solution is applied to one or both of the bead base portion 3 and the PTFE porous sheet 4 of the tire 2. After gluing the two together, dry
When crosslinked, the two are strongly bonded. in this case,
Since the rubber penetrates into the porous spaces of the PTFE porous sheet 4 and is integrally bonded to its microfiber structure, a strong bonding force is obtained.
このように構成したタイヤ２のビードベース部
３は、ビードベース部３の保持する弾性に加え
て、その表面の全部あるいは一部に強固に結合し
たPTFE多孔質シート４により表面のすべり摩擦
係数がきわめて減少する。 The bead base portion 3 of the tire 2 configured in this way has, in addition to the elasticity held by the bead base portion 3, the sliding friction coefficient of the surface due to the PTFE porous sheet 4 firmly bonded to all or part of the surface. extremely reduced.
弗素ゴム・ダイエルＧ−501（ダイキン工業
製）100重量部に対して、MTカーボンブラツク
20重量部、酸化マグネシウム・キヨーワマグMA
−30（協和化学工業製）15重量部を配合し、ロー
ルで混練したものをメチルエチルケトンに溶解さ
せて25％溶液を調製した。この溶液に架橋剤とし
てヘキサメチレンジアミン・カルバメートを弗素
ゴム100重量部に対して1.5重量部となるように添
加して撹拌混合した。
MT Carbon Black per 100 parts by weight of fluororubber Daiel G-501 (manufactured by Daikin Industries)
20 parts by weight, magnesium oxide Kiyowa Mag MA
-30 (manufactured by Kyowa Chemical Industry Co., Ltd.) 15 parts by weight was blended, kneaded with a roll, and dissolved in methyl ethyl ketone to prepare a 25% solution. Hexamethylene diamine carbamate as a crosslinking agent was added to this solution in an amount of 1.5 parts by weight per 100 parts by weight of fluororubber, and the mixture was stirred and mixed.
一方、タイヤ２のビードベース部３に貼付ける
ゴムシートとして上記と同材質の充填剤入り弗素
ゴムシート５（厚さ0.5μ）を（第２図参照）、
PTFE多孔質シート４として、厚さ80μｍ、平均
孔径５μｍ、空隙率85％のフロロポアFT−500
（往友電工製）をそれぞれ準備した。弗素ゴムシ
ート５の片面及びPTFE多孔質シート４の片面に
上記の弗素ゴム配合物溶液を塗布して両者を貼り
合せ、同様に弗素ゴムシート５の片面に弗素ゴム
配合物溶液を塗布してタイヤ２のビードベース部
３に貼り合わせ、50℃の気流中でメチルエチルケ
トンを蒸発除去した後、タイヤ加硫機で加硫成型
を行なつた。 On the other hand, as a rubber sheet to be attached to the bead base portion 3 of the tire 2, a filler-containing fluororubber sheet 5 (thickness 0.5μ) made of the same material as above was used (see Fig. 2).
Fluoropore FT-500 with a thickness of 80 μm, average pore diameter of 5 μm, and porosity of 85% is used as the PTFE porous sheet 4.
(manufactured by Otomo Denko) were prepared. The above-mentioned fluororubber compound solution is applied to one side of the fluororubber sheet 5 and one side of the PTFE porous sheet 4, and the two are bonded together. Similarly, the fluororubber compound solution is applied to one side of the fluororubber sheet 5 to form a tire. After the methyl ethyl ketone was evaporated and removed in an air stream at 50° C., vulcanization molding was performed using a tire vulcanizer.
得られたタイヤ２をリム組みしたところ、すべ
り摩擦係数が非常に小さいから、ビードがスムー
スにリムフランジ１に嵌合した。 When the obtained tire 2 was assembled into a rim, the beads fitted smoothly into the rim flange 1 because the coefficient of sliding friction was very small.
なお、リム６のビードシート部１にビードをス
ムースに嵌合させるためには、ビードベース部３
の70％以上にPTFE多孔質シート４を固着するの
が好ましい。 Note that in order to fit the bead smoothly into the bead seat portion 1 of the rim 6, the bead base portion 3
It is preferable to fix the PTFE porous sheet 4 to 70% or more of the area.
PTFE多孔質シート４を固着したビードベース
部３を有するタイヤ２は、リム外れを防止機構例
えば第３図に示すいわゆるデノボ／デンロツクリ
ム８、安全リムバンド（特公昭53−331613号参
照）、BFGタイヤ／ホイールシステムSAE
（SOCIETY OF AUTOMOTIVE
ENGINEERS、INC）77034P参照）を併用する
と、リム外れ防止性能を落すことなく、リム組み
性が良くなる。 The tire 2, which has a bead base portion 3 to which a PTFE porous sheet 4 is fixed, has a mechanism for preventing the rim from coming off, such as the so-called de-novo/denrotsu rim 8 shown in FIG. wheel system SAE
(SOCIETY OF AUTOMOTIVE
When used in combination with ENGINEERS, INC) 77034P), the rim assembly becomes easier without compromising the rim removal prevention performance.
以上の説明からも明らかなように、本発明は、
タイヤの少なくともビードベース部に、摩擦係数
が小さいPTFE多孔質シートを固着し加硫成型し
たものであるから、タイヤのリム組み作業がスム
ースに行なえ、石ケン水やワツクスを全く必要と
しなくなる。 As is clear from the above explanation, the present invention
Since a porous PTFE sheet with a low coefficient of friction is fixed and vulcanized to at least the bead base of the tire, the tire rim assembly process can be carried out smoothly and there is no need for soap, water or wax.
また、嵌合がスムースであるからビードベース
部のリムフランジへの密着も均一化し、嵌合量の
不均一によるタイヤ振れに起因する振動も低減す
るようになる。 Furthermore, since the fitting is smooth, the adhesion of the bead base portion to the rim flange becomes uniform, and vibrations caused by tire runout due to uneven fitting amount are also reduced.
さらに、PTFE多孔質シートはゴムとの接着が
容易で、また多孔質であるから変形によつてクラ
ツクが生じることもない。 Furthermore, the PTFE porous sheet can be easily bonded to rubber, and since it is porous, no cracks will occur due to deformation.
第１図はタイヤのビードベース部とリムとの嵌
合状態を示す断面図、第２図はPTFE多孔質シー
トを貼合わせたゴムシートの断面図、第３図はデ
ノボ／デンロツクリムとタイヤ組立体の断面図で
ある。
１……リムのビードシート、２……タイヤ、３
……ビードベース部、４……PTFE多孔質シー
ト、５……ゴムシート、６……リム、７……リム
のフランジ部。
Figure 1 is a cross-sectional view showing how the tire bead base and rim fit together, Figure 2 is a cross-sectional view of a rubber sheet laminated with a PTFE porous sheet, and Figure 3 is a de novo/denro rim and tire assembly. FIG. 1... Rim bead seat, 2... Tire, 3
...Bead base part, 4...PTFE porous sheet, 5...Rubber sheet, 6...Rim, 7...Rim flange part.
Claims (1)
から成るミクロ構造を有するポリテトラフルオロ
エチレン多孔質シートとビードベース部ゴムと類
似のゴムとを結合させたゴムシートが、少なくと
もビードベース部に、該ビードベース部の一部と
して設けられていて、生タイヤ成形時に同時に加
硫成形されてビードベース部と一体化されている
ことを特徴とするタイヤ。1. A rubber sheet in which a polytetrafluoroethylene porous sheet having a microstructure consisting of fibers and nodules interconnected by the fibers and a rubber similar to the bead base rubber are combined at least in the bead base portion. A tire characterized in that the tire is provided as a part of the bead base portion and is vulcanized and integrated with the bead base portion at the same time as green tire molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56103607A JPS584608A (en) | 1981-06-30 | 1981-06-30 | Tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56103607A JPS584608A (en) | 1981-06-30 | 1981-06-30 | Tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS584608A JPS584608A (en) | 1983-01-11 |
| JPS6213205B2 true JPS6213205B2 (en) | 1987-03-25 |
Family
ID=14358454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56103607A Granted JPS584608A (en) | 1981-06-30 | 1981-06-30 | Tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS584608A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2196233T3 (en) * | 1996-10-30 | 2003-12-16 | Michelin & Cie | TIRE WITH HEELS CONCEIVED TO FACILITATE DISASSEMBLY. |
| US6116313A (en) * | 1996-10-30 | 2000-09-12 | Compagnie Generale Des Etablissementis Michelin-Michelin & Cie | Tire with beads designed to ease removal from rim |
| JP4700410B2 (en) * | 2005-05-27 | 2011-06-15 | 住友ゴム工業株式会社 | Pneumatic tire |
-
1981
- 1981-06-30 JP JP56103607A patent/JPS584608A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS584608A (en) | 1983-01-11 |
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