JPH045029A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH045029A JPH045029A JP10715490A JP10715490A JPH045029A JP H045029 A JPH045029 A JP H045029A JP 10715490 A JP10715490 A JP 10715490A JP 10715490 A JP10715490 A JP 10715490A JP H045029 A JPH045029 A JP H045029A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- seal
- sealing material
- nail
- layer
- 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
- 239000004636 vulcanized rubber Substances 0.000 claims abstract description 4
- 239000003566 sealing material Substances 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 39
- 229920001971 elastomer Polymers 0.000 description 15
- 239000005060 rubber Substances 0.000 description 15
- 238000007789 sealing Methods 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 229920001083 polybutene Polymers 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- 239000013032 Hydrocarbon resin Substances 0.000 description 1
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- VRKPBVQKPOZMSO-UHFFFAOYSA-N [S].C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 Chemical compound [S].C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 VRKPBVQKPOZMSO-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- RTACIUYXLGWTAE-UHFFFAOYSA-N buta-1,3-diene;2-methylbuta-1,3-diene;styrene Chemical compound C=CC=C.CC(=C)C=C.C=CC1=CC=CC=C1 RTACIUYXLGWTAE-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
- B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
- B29D2030/0695—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being in the form of one wide strip, e.g. a patch
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、空気入りタイヤの釘踏み等によるエアー洩れ
発生時に、そのエアー洩れ速度を著しく遅くすることの
できる技術に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a technology that can significantly slow down the rate of air leakage when air leaks from a pneumatic tire due to stepping on a nail or the like.
（従来の技術）
タイヤ内面に粘着ゴム層を設け、釘等が侵入した場合に
これと粘着することでエアー洩れを防止する方法は、例
えば特開昭５５−１１９９８号や特開昭５５−１５３９
７号にて従来より知られている。(Prior art) A method of providing an adhesive rubber layer on the inner surface of a tire to prevent air leakage by adhering to nails or the like that enters the tire is disclosed in, for example, JP-A-55-11998 and JP-A-55-1539.
It is conventionally known as No. 7.
また、カーカスプライ内側面に２層の加硫可能なゴム組
成物層の間にはさまれたシール物質層を有するものとし
ては、特開平１−２０８２０７号がある。Further, as a carcass ply having a sealing material layer sandwiched between two vulcanizable rubber composition layers on the inner surface of the carcass ply, there is JP-A-1-208207.
（発明か解決しようとする問題点）
しかし、タイヤ内面に粘着ゴム層を設けた特開昭５５−
１１９９８号、特開昭５５−１５３９７号に代表される
タイヤでは、粘着層がタイヤの内部空気に晒さているた
めに使用中に劣化して目的を達成し得なかったり、釘が
侵入した部分の粘着層で目的を達成するためにはその個
所の層厚が３〜５ｍｍであることを要し、この結果タイ
ヤが重くなって燃費性及び発熱耐久性を損うことになっ
たりするという問題があった。また、タイヤ回転に伴う
遠心力で粘着層がタイヤの赤道面付近に集まってしまっ
たり、長期間停止時に一個所に集まってしまったりして
、釘の侵入かいつとこからあっても対処し得るという状
態を保持することが困難であった。更に、粘着層の製造
には、従来のタイヤ製造ラインにない混練機及び塗布設
備を必要とした。(Problem to be solved by the invention) However, in JP-A No. 55-1999, an adhesive rubber layer was provided on the inner surface of the tire.
In the tires typified by No. 11998 and JP-A-55-15397, the adhesive layer deteriorates during use because it is exposed to the air inside the tire, making it impossible to achieve the intended purpose, or the adhesive layer is exposed to the air inside the tire, making it impossible to achieve the intended purpose. In order to achieve the purpose of the adhesive layer, the layer thickness at that point must be 3 to 5 mm, which causes the problem that the tire becomes heavier and the fuel efficiency and heat generation durability are impaired. there were. In addition, if the adhesive layer collects near the equatorial plane of the tire due to centrifugal force as the tire rotates, or if the adhesive layer collects in one place when the tire is stopped for a long time, it can be dealt with even if a nail intrudes from anywhere. It was difficult to maintain this state. Furthermore, manufacturing the adhesive layer required a kneading machine and coating equipment that are not found in conventional tire manufacturing lines.
これらの問題点から、タイヤ内面に粘着ゴム層を設けた
これらのタイヤは、一定のエアー洩れ防止効果があった
にもかかわらず、製品として市場では殆ど見られないの
が実情であった。Due to these problems, these tires with an adhesive rubber layer provided on the inner surface of the tire are rarely seen on the market as products, although they have a certain air leakage prevention effect.
また、特開平１−２０８２０７号のようにタイヤのカー
カスプライ内側面に配設された２層の加硫可能なゴム組
成物層の間にシール物質層を有するのでも、シール物質
層にエアー入りを生じ、このエアー入り部に釘が刺さっ
た場合には著しくシール性能か落ちるという欠点があっ
た。In addition, even if a sealing material layer is provided between two vulcanizable rubber composition layers disposed on the inner surface of the carcass ply of a tire as in JP-A-1-208207, air may enter the sealing material layer. This has the disadvantage that if a nail gets stuck in this air inlet, the sealing performance will be significantly degraded.
即ち、タイヤの大部分を形成しているゴム組成物やブラ
イコードなどは、それ自体が気泡を含有していたり、成
型時にエアーを包み込んだりすることが常であり、加硫
温度で気化する薬品類が使用されている場合が多い。こ
のようなエアーやガスは、加硫圧が解かれると共に噴出
するが、−酸タイヤにおいては、Ｉ’ｆｆｌしたエアー
・ガス（オゴム組成物が架橋しているためにゴム組成物
内には残れずタイヤ外に出てしまうため問題にならない
。In other words, the rubber compositions and bricord that make up the majority of tires usually contain air bubbles or enclose air during molding, and chemicals that vaporize at vulcanization temperatures. types are often used. Such air and gas blow out when the vulcanization pressure is released, but in acid tires, I'ffl air gas (because the rubber composition is cross-linked, it remains in the rubber composition). This is not a problem because it does not fall off and comes out of the tire.
しかし、前記のシール物質のような低粘度で、流動性の
あるものかタイヤ内にあると、その部分はエアー・ガス
を外に出すことができないばかりか、近接するゴム組成
物中からのエアー・ガスの侵入を受け、この層内に多く
のエアー入りを形成してしまうこととなり、かかるエア
ー入り部に釘が刺さった場合には著しくシール性能が落
ちるという欠点があったのである。However, if a low-viscosity, fluid seal material such as the above-mentioned sealing material is present inside the tire, not only will air and gas not be able to escape from that area, but air from nearby rubber compositions will be trapped inside the tire. - Due to gas intrusion, many air pockets are formed in this layer, and if a nail penetrates into such air pockets, the sealing performance deteriorates significantly.
そこで、本発明の目的は上述のすべての問題点を解消し
、エアー洩れを少なくするという効果だけを残すことの
できる優れた技術を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an excellent technique that can eliminate all of the above-mentioned problems and leave only the effect of reducing air leakage.
（問題点を解決するための手段）
本発明者らは、上記従来技術の問題点を解決すべく鋭意
検討した結果、空気入りタイヤを下記の如く構成するこ
とにより上記目的を達成し得ることを見い出し、本発明
を完成するに至った。(Means for Solving the Problems) As a result of intensive studies to solve the problems of the prior art described above, the present inventors have found that the above objects can be achieved by configuring a pneumatic tire as follows. This finding led to the completion of the present invention.
即ち、タイヤのカーカスプライ内面に配設された２層の
加硫ゴム組成物層の間に連続層をなすシール物質層を有
する空気入りタイヤであって、前記シール物質の粘度が
１０’Ｃで１×１０５ポイズ以下、６０℃で２Ｘ１０３
〜４×１０４ボイスであり、かつ前記シール物質は少な
くとも１部に架橋構造を有することを特徴とする空気入
りタイヤを提供するものである。That is, a pneumatic tire having a sealing material layer forming a continuous layer between two vulcanized rubber composition layers disposed on the inner surface of the carcass ply of the tire, wherein the sealing material has a viscosity of 10'C. 1 x 105 poise or less, 2 x 103 at 60℃
The present invention provides a pneumatic tire having a voice of ˜4×10 4 and characterized in that the sealing material has at least a portion of a crosslinked structure.
本発明において配設するシール物質層は、ポリエチレン
、ポリプロピレン、ポリブタジェン、ポリイソプレン、
ポリブテン、イソプレン−ブタジェン共重合体、スチレ
ン−ブタジェン共重合体、スチレン−イソプレン共重合
体、スチレン−イソプレン−ブタジエン３元共重合体、
アクリロニトリル−ブタジェン共重合体、シリコーンゴ
ム及び熱可塑性樹脂から選択された一種または二種以上
の組み合わせを主成分とし、粘度が１０℃で１×１０５
ポイズ以下、６０℃で２×１０３〜４ｘ１０４ボイズの
範囲である。The sealing material layer provided in the present invention includes polyethylene, polypropylene, polybutadiene, polyisoprene,
Polybutene, isoprene-butadiene copolymer, styrene-butadiene copolymer, styrene-isoprene copolymer, styrene-isoprene-butadiene terpolymer,
The main component is one or a combination of two or more selected from acrylonitrile-butadiene copolymer, silicone rubber, and thermoplastic resin, and has a viscosity of 1 x 105 at 10°C.
Below poise, it is in the range of 2 x 103 to 4 x 104 poise at 60°C.
なお、かかる粘度は、レオメトリクス社製スペクトロメ
ータＲＶＥによるｉ＋＋定値である。Note that this viscosity is an i++ constant value determined by a RVE spectrometer manufactured by Rheometrics.
そしてここに用いられるシール物質層は、硫黄架橋、過
酸化物架橋、光架橋のいずれかの架橋方法により少なく
とも一部に架橋構造を有するものである。即ち、必要に
応じて加硫剤、過酸化物架橋剤、光架橋剤等を配合する
ことができる。The sealing material layer used here has at least a partially crosslinked structure by any one of sulfur crosslinking, peroxide crosslinking, and photocrosslinking. That is, a vulcanizing agent, a peroxide crosslinking agent, a photocrosslinking agent, etc. can be added as necessary.
また、このシール物質層には、必要に応じて粘着剤、軟
化剤、充填材等を配合することができることは言うまで
もない。Furthermore, it goes without saying that an adhesive, a softener, a filler, etc. can be added to this sealing material layer as required.
（作用）
本発明において、上記加硫可能なゴム組成物層は、直接
タイヤの耐疲労破壊性を低下させることのないようにタ
イヤのカーカスプライの内側面に配置しである。またシ
ール物質層は、低温時即ち１０℃以上で有効な粘着性及
び流動性を有するように、粘度を１０℃でＩ Ｘ １０
５ボイズ以下、６０℃で２Ｘ１０３〜４ＸＩＯ’ボイス
となる物質が選定されるものである。(Function) In the present invention, the vulcanizable rubber composition layer is disposed on the inner surface of the carcass ply of the tire so as not to directly reduce the fatigue fracture resistance of the tire. In addition, the sealing material layer has a viscosity of I x 10 at 10°C so that it has effective adhesiveness and fluidity at low temperatures, that is, above 10°C.
A material that has 5 voices or less and 2X103 to 4XIO' voices at 60°C is selected.
かかる粘度範囲を採用した理由は次の通りである。即ち
６０°Ｃというタイヤ温度は一般には高速走行時に上が
る温度であるが、タイヤに前も−って釘が刺さっていた
場合に、この釘は非常に大きな遠心力がかかることによ
って抜けやすくなる。これが抜けると急激に内圧が低下
するため、ハンドルが取られるなど非常に危険な状態に
なる。従って、この場合の危険を回避するためには、釘
が抜けた穴をできるだけ小さくする必要がある。しかる
に、６０℃でのシール物質の粘度が４×１０４ボイス以
下であればかかるシール物質は十分な粘着性と流動性に
より釘の抜けた穴を非常に小さくすることができるので
ある。The reason for adopting such a viscosity range is as follows. That is, the tire temperature of 60°C is generally the temperature that rises when driving at high speeds, but if a nail is stuck in the tire in front of the tire, the nail will easily come out due to the application of a very large centrifugal force. If this happens, the internal pressure will drop rapidly, creating a very dangerous situation such as the handle becoming detached. Therefore, in order to avoid this danger, it is necessary to make the hole through which the nail has come out as small as possible. However, if the viscosity of the sealing material at 60 DEG C. is 4.times.10@4 Boices or less, the sealing material has sufficient adhesiveness and fluidity to make the hole through which the nail passes very small.
しかし、一方で６０℃での粘度が２Ｘ１０”ボイス以下
となると高速走行による発熱と遠心力でシール物質が流
動するために、シール物質層の厚さが不均一となり、薄
くなった部分で十分なシール効果を発揮できなくなった
り、バランスが狂ってしまうという問題が生じる。However, if the viscosity at 60°C is less than 2 x 10" voice, the sealing material will flow due to the heat generation and centrifugal force caused by high-speed running, making the thickness of the sealing material layer uneven, and the thinner part will not be sufficient. Problems arise in that the sealing effect cannot be exerted or the balance is thrown out of order.
以上の理由からシール物質の粘度には一定の限界がある
。For the above reasons, there is a certain limit to the viscosity of the sealing material.
本発明において、エアーシールすべき部材は、エアーシ
ールするシール物質層とこのシール物質層を保持する加
硫可能なゴム組成物層とから構成されており、シール物
質層は縦横に連続層を形成しており、これによりタイヤ
に釘等が侵入して来た場合には、内圧により押されてい
るシール物質が釘等の周辺に集まってシールし、あたか
もシール物質が血液であり、保持する加硫可能ゴム組成
物層が肉のように作用する。In the present invention, the member to be air-sealed is composed of a sealing material layer for air-sealing and a vulcanizable rubber composition layer for holding this sealing material layer, and the sealing material layer forms a continuous layer vertically and horizontally. As a result, if a nail, etc. enters the tire, the sealing material pressed by the internal pressure gathers around the nail, forming a seal, as if the sealing material were blood and the retaining force The sulfurable rubber composition layer acts like meat.
シール物質層は、加硫後のエアー入りを防ぐ目的で、部
分架橋されており、これにより本発明タイヤではシール
物質層を配置している領域内であればどこに釘等が刺さ
っても、均一なエアーシール性能を発揮することができ
る。The sealing material layer is partially cross-linked in order to prevent air from entering after vulcanization, and as a result, in the tire of the present invention, even if a nail or the like is inserted anywhere within the area where the sealing material layer is placed, the sealing material layer will be uniformly cross-linked. It can demonstrate excellent air seal performance.
また、この釘等が抜ける場合には、その粘着性により釘
等のまわりにまとわりついていたシール物質は、抜ける
際にその穴を小さくし、さらに内圧により流動してその
穴をさらに小さくするように作用する。これらの作用に
より、本発明タイヤは、釘等によるエアー洩れ速度を著
しく遅くすることができるのである。In addition, when this nail etc. comes out, the sealing substance that has clung around the nail etc. due to its adhesiveness makes the hole smaller when it comes out, and furthermore, flows due to internal pressure and makes the hole even smaller. act. Due to these effects, the tire of the present invention can significantly reduce the rate of air leakage caused by nails, etc.
更に、従来技術か内圧、毛管現象を利用することにより
釘等が侵入するであろう部分に多量の粘着性シーラント
を使用するのに較べ、本発明においては、少ない容積で
同一機能を発揮できるのでタイヤの発熱性、燃費性等の
面で有利である。Furthermore, compared to conventional techniques that use internal pressure or capillary action to use a large amount of adhesive sealant in areas where nails or the like may enter, the present invention can perform the same function with a smaller volume. This is advantageous in terms of tire heat generation, fuel efficiency, etc.
このシール物質層は厚い方がシール性能を向上させるが
、耐久性能等の他の性能を著しく悪化させないためには
、２ｍｍ以下であることが好ましいものといえる。The thicker the sealing material layer, the better the sealing performance, but in order to avoid significant deterioration of other performances such as durability, it is preferable that the thickness is 2 mm or less.
（実施例） 次に本発明を実施例により説明する。(Example) Next, the present invention will be explained by examples.
第１図に示すような乗用車用チューブレスラジアルタイ
ヤ１６５ＳＲ１３を下記の第１表に示す条件の下で試作
した。A tubeless radial tire 165SR13 for a passenger car as shown in FIG. 1 was experimentally produced under the conditions shown in Table 1 below.
本発明に係るシール物質層２を内包する加硫可能なゴム
組成物３は第１図に示す如くカーカスプライ１の内面に
配置した。A vulcanizable rubber composition 3 containing a sealing material layer 2 according to the invention was placed on the inner surface of a carcass ply 1 as shown in FIG.
供試タイヤを車両のリアーに装着してから、直径３ｍｍ
、長さ６５ｍｍの釘を錆びさせたものを第３図に示す個
所（矢印）に打ち込み、釘がささっている状態で平均速
度８０ ｋ ｍ ／ ｈで一周３．５ｋｍの周回路を走
行させ、初期内圧２．０ｋｇ／βｍ２か１０ｋｇ／ｃＩ
Ｔ１２になる走行距離を３時間おきにチエツクした空気
圧データから推定した。After installing the test tire on the rear of the vehicle, the diameter of the tire is 3mm.
A rusted nail with a length of 65 mm was driven into the location (arrow) shown in Figure 3, and the vehicle was driven around a circuit of 3.5 km at an average speed of 80 km/h with the nail in place. Initial internal pressure 2.0kg/βm2 or 10kg/cI
The mileage that would result in T12 was estimated from air pressure data checked every three hours.
また、走行後に釘を抜いた時のエアー洩れ防止率も併せ
て示した。このエアー洩れ防止率とは、釘を打った個所
のうちエアー洩れ速度が、シール物質のないタイヤの１
／１００以下となった個所の数を百分率で表したもので
ある。The air leakage prevention rate when the nail is removed after running is also shown. This air leakage prevention rate means that the air leakage rate at the nailed location is 1% of that of a tire without sealing material.
/100 or less is expressed as a percentage.
更に、１時間周回路走行後のタイヤ内部温度を予めベル
ト中央部にあけた直径２ｍｍの穴に熱電対を差し込み測
定した。これら試験結果を第１表に併記する。Furthermore, the internal temperature of the tire after running around the circuit for 1 hour was measured by inserting a thermocouple into a hole with a diameter of 2 mm previously drilled in the center of the belt. These test results are also listed in Table 1.
なお、第１表中、配合剤は次の通りである。In addition, in Table 1, the ingredients are as follows.
ブチルゴム
： ＪＳＲ製 ｌｌＲ２６８
シリコーンゴム
：ＪＳＲ製 ＥＨ５５２０Ｕ
スチレン−イソプレン系熱可塑性樹脂
： ＪＳＲ製 ＳＩ ５５０００
スチレン−ブタジェン系熱可塑性樹脂
：ＪＳＲ製 ＴＲ１０００
シンジオタクチック１，２ポリブタジェン： ＪＳＲ製
ＲＥ２Ｏ３
ポリブテン
：出光石油化学制 ポリブテン３００Ｒシリコーンオイ
ル
二乗レシリコーン製 ＦＨ−２００
液状イソプレン
：クラレ製 ＬＩＲ５０
シリカ
ニ日本シリカ製 ＶＮ−３
脂環族飽和炭化水素樹脂
：荒用化学製 アルコンＭ１１５
イオウ
ジクミルパーオキサイド
：日本油脂製 パークミルＤ
ペンジルメチルケタール
：チバガイギー製 イルガキュア６５１トリメチロルプ
ロパントリアクリレート：新中村化学製 Ａ−ＴＭＰＴ
比較例１は、シール物質層が架橋構造を有するが、粘度
が高いため、十分なシール性能を有するとは言えない。Butyl rubber: llR268 manufactured by JSR Silicone rubber: EH5520U manufactured by JSR Styrene-isoprene thermoplastic resin: SI 55000 manufactured by JSR Styrene-butadiene thermoplastic resin: TR1000 manufactured by JSR Syndiotactic 1,2 polybutadiene: RE2O3 manufactured by JSR Polybutene: Idemitsu Petrochemical Polybutene 300R silicone oil squared Resilicone FH-200 Liquid isoprene: Kuraray LIR50 Silikani Nippon Silica VN-3 Alicyclic saturated hydrocarbon resin: Arayo Kagaku Alcon M115 Sulfur dicumyl peroxide: NOF Parkmil D Penzyl methyl ketal: Irgacure 651 manufactured by Ciba Geigy Trimethylolpropane triacrylate: A-TMPT manufactured by Shin Nakamura Chemical In Comparative Example 1, the sealing material layer has a crosslinked structure, but the viscosity is high, so it is difficult to say that it has sufficient sealing performance. I can not say.
比較例２は、架橋構造を持たないために、シル物質層内
にエアー入りを生じ、このエアー入り部に釘が刺さった
場合に著しくシール性が落ちてしまった。In Comparative Example 2, since it did not have a crosslinked structure, air entered the seal material layer, and when a nail was inserted into this air entry portion, the sealing performance was significantly deteriorated.
このため、エアー入り部ではない正常な部分に釘が刺さ
った場合にはよいシール性能を発揮するにもかかわらず
、大きなバラツキのために、十分なシール性があるとは
言えないのである。For this reason, even though good sealing performance is achieved when a nail penetrates a normal part that is not an air entry part, it cannot be said that there is sufficient sealing performance due to large variations.
実施例１〜８は、本発明に係る例である。Examples 1 to 8 are examples according to the present invention.
実施例１．２は、シール物質がイオウによる加硫を、実
施例３．４はパーオキサイドによる架橋を、実施例５〜
７は、紫外線照射による光架橋を各々行なったものであ
る。In Example 1.2, the sealing material was vulcanized with sulfur, in Example 3.4, crosslinked with peroxide, and in Examples 5-
Sample No. 7 was photocrosslinked by ultraviolet irradiation.
即ち、比較例１．２及び実施例１〜４にあっては、タイ
ヤ加硫時に同時にシール物質を部分架橋したものであり
、実施例５〜７にあっては所定の粘度となるように、紫
外線照射を施したものである。That is, in Comparative Example 1.2 and Examples 1 to 4, the sealing material was partially crosslinked at the same time as tire vulcanization, and in Examples 5 to 7, the sealing material was partially crosslinked at the same time as the tire was vulcanized, and in Examples 5 to 7, the sealing material was partially crosslinked to obtain a predetermined viscosity. It has been irradiated with ultraviolet light.
実施例１〜７はいずれも十分な走行距離とシール性能を
有する。Examples 1 to 7 all have sufficient mileage and seal performance.
特に実施例４は第２図に示すようにシール物質層を２層
にしたものである。結果は一層の場合よりはシール性が
向上している。In particular, Example 4 has two sealing material layers as shown in FIG. The result is better sealing performance than in the case of a single layer.
（発明の効果）
以上説明してきたように、本発明の空気入りタイヤでは
、■従来の粘着ゴム層をタイヤ内表面に有する空気入り
タイヤや、流動性の高い非架橋シール物質層を加硫ゴム
組成物間に有する空気入りタイヤに較べ、安定したエア
ーシール性が発揮され、■タイヤの成型時にシール材を
通常の部材と同様に取り扱うことができ、■シール物質
の少ない量で従来と同等以上の効果が発揮されることか
らタイヤの発熱性及び燃費性の面で有利である。(Effects of the Invention) As explained above, in the pneumatic tire of the present invention, ■ a conventional pneumatic tire having an adhesive rubber layer on the inner surface of the tire, and a vulcanized rubber layer having a highly fluid non-crosslinked sealing material layer. Compared to pneumatic tires that have between the compositions, stable air sealing properties are demonstrated; ■ The sealing material can be handled in the same way as ordinary parts when molding tires; ■ The sealing material is equivalent to or better than conventional products with a small amount of sealing material. This is advantageous in terms of heat generation and fuel efficiency of the tire.
第１図は、本発明の空気入りタイヤの一例を示す断面図
、第２図は２層のシール物質層を有する本発明の空気入
りタイヤの断面図、第３図は実施例で用いた空気入りタ
イヤと釘の打込み位置を示す断面図である。
１・・・カーカスプライ
２・・・シール物質層
３・・・加硫可能なゴム組成物層FIG. 1 is a cross-sectional view showing an example of a pneumatic tire of the present invention, FIG. 2 is a cross-sectional view of a pneumatic tire of the present invention having two sealing material layers, and FIG. FIG. 3 is a cross-sectional view showing the inserting tire and the nail driving position. 1... Carcass ply 2... Seal material layer 3... Vulcanizable rubber composition layer
Claims (1)
加硫ゴム組成物層の間に連続層をなすシール物質層を有
する空気入りタイヤであって、前記シール物質の粘度が
１０℃で１×１０＾５ポイズ以下、６０℃で２×１０＾
３〜４×１０＾４ポイズであり、かつ前記シール物質は
少なくとも１部に架橋構造を有することを特徴とする空
気入りタイヤ。(1) A pneumatic tire having a sealing material layer forming a continuous layer between two vulcanized rubber composition layers disposed on the inner surface of the carcass ply of the tire, wherein the sealing material has a viscosity of 10°C. 1 x 10^5 poise or less, 2 x 10^ at 60℃
3 to 4×10^4 poise, and at least a portion of the sealing material has a crosslinked structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10715490A JPH045029A (en) | 1990-04-23 | 1990-04-23 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10715490A JPH045029A (en) | 1990-04-23 | 1990-04-23 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH045029A true JPH045029A (en) | 1992-01-09 |
Family
ID=14451878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10715490A Pending JPH045029A (en) | 1990-04-23 | 1990-04-23 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045029A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6911104B1 (en) | 1999-11-24 | 2005-06-28 | Honda Giken Kogyo Kabushiki Kaisha | Sealant filling methods for sealant-containing tire and sealant-containing tire tube |
| WO2008081914A1 (en) | 2006-12-28 | 2008-07-10 | Banyu Pharmaceutical Co., Ltd. | Novel aminopyrimidine derivative as plk1 inhibitor |
| JP2011190397A (en) * | 2010-03-16 | 2011-09-29 | Tokai Rubber Ind Ltd | Highly damping rubber composition and vibration control damper using the same |
| JP2011529972A (en) * | 2008-08-01 | 2011-12-15 | ソシエテ ド テクノロジー ミシュラン | Self-sealing composition for inflatable articles |
| IT201800006012A1 (en) * | 2018-06-04 | 2019-12-04 | MIXING OF A SEALANT LAYER OF A TIRE AND METHOD FOR THE PREPARATION OF THE SAME |
-
1990
- 1990-04-23 JP JP10715490A patent/JPH045029A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6911104B1 (en) | 1999-11-24 | 2005-06-28 | Honda Giken Kogyo Kabushiki Kaisha | Sealant filling methods for sealant-containing tire and sealant-containing tire tube |
| WO2008081914A1 (en) | 2006-12-28 | 2008-07-10 | Banyu Pharmaceutical Co., Ltd. | Novel aminopyrimidine derivative as plk1 inhibitor |
| JP2011529972A (en) * | 2008-08-01 | 2011-12-15 | ソシエテ ド テクノロジー ミシュラン | Self-sealing composition for inflatable articles |
| US8614276B2 (en) | 2008-08-01 | 2013-12-24 | Michelin Recherche Et Technique S.A. | Self-sealing composition for pneumatic object |
| JP2011190397A (en) * | 2010-03-16 | 2011-09-29 | Tokai Rubber Ind Ltd | Highly damping rubber composition and vibration control damper using the same |
| IT201800006012A1 (en) * | 2018-06-04 | 2019-12-04 | MIXING OF A SEALANT LAYER OF A TIRE AND METHOD FOR THE PREPARATION OF THE SAME | |
| WO2019234570A1 (en) * | 2018-06-04 | 2019-12-12 | Bridgestone Corporation | Sealing layer of a pneumatic tyre and method for its preparation |
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