JPH05169909A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH05169909A JPH05169909A JP3344619A JP34461991A JPH05169909A JP H05169909 A JPH05169909 A JP H05169909A JP 3344619 A JP3344619 A JP 3344619A JP 34461991 A JP34461991 A JP 34461991A JP H05169909 A JPH05169909 A JP H05169909A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- tire
- nylon
- molecular weight
- high molecular
- 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
- 229920001971 elastomer Polymers 0.000 claims abstract description 47
- 239000005060 rubber Substances 0.000 claims abstract description 46
- 239000004677 Nylon Substances 0.000 claims abstract description 39
- 229920001778 nylon Polymers 0.000 claims abstract description 39
- 239000000956 alloy Substances 0.000 claims abstract description 36
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 229920001577 copolymer Polymers 0.000 claims abstract description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000470 constituent Substances 0.000 claims description 15
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 32
- -1 polyethylene Polymers 0.000 abstract description 7
- 229920000573 polyethylene Polymers 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract 2
- 229920002943 EPDM rubber Polymers 0.000 description 13
- 239000000203 mixture Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000004073 vulcanization Methods 0.000 description 6
- 229920000571 Nylon 11 Polymers 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000004636 vulcanized rubber Substances 0.000 description 5
- 229920002292 Nylon 6 Polymers 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- VHOQXEIFYTTXJU-UHFFFAOYSA-N Isobutylene-isoprene copolymer Chemical compound CC(C)=C.CC(=C)C=C VHOQXEIFYTTXJU-UHFFFAOYSA-N 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002688 maleic acid derivatives Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ナイロン系アロイをタ
イヤの構成材料に使用することにより軽量化と共に空気
保持性を向上した空気入りタイヤに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire which is made lightweight by using a nylon alloy as a constituent material of a tire and has improved air retention.
【０００２】[0002]
【従来の技術】自動車における大きな技術的課題の一つ
に低燃費性がある。この技術課題を解決する対策の一環
として、空気入りタイヤに対しても軽量化に対する要求
がますます強いものになってきている。この空気入りタ
イヤの軽量化の１つの手段としては、ゴムの使用量を減
らせばよいが、単にゴム量を減らしただけでは剛性の低
下によってタイヤ性能等を悪化させることになるので限
界がある。2. Description of the Related Art One of the major technical problems in automobiles is low fuel consumption. As part of measures to solve this technical problem, there is an increasing demand for weight reduction of pneumatic tires. One means for reducing the weight of the pneumatic tire is to reduce the amount of rubber used. However, simply reducing the amount of rubber causes a decrease in rigidity and deteriorates tire performance and the like.
【０００３】そこで、上述のような問題の対策として、
ゴムの一部を結晶性の熱可塑性樹脂によって代替させる
試みがあるが、一般に加硫ゴムとの接着性が悪いため、
タイヤのような動的用途への使用は困難とされていた。Therefore, as a measure against the above problems,
There is an attempt to replace a part of rubber with a crystalline thermoplastic resin, but in general, the adhesiveness with vulcanized rubber is poor,
It has been considered difficult to use for dynamic applications such as tires.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、熱可
塑性樹脂としてナイロン系アロイを使用することによ
り、軽量化と共に空気圧保持性を向上した空気入りタイ
ヤを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a pneumatic tire which is lightweight and has improved air pressure retention by using a nylon alloy as a thermoplastic resin.
【０００５】[0005]
【課題を解決するための手段】このような目的を達成す
る本発明は、ナイロン系アロイをインナーライナー及び
／又はビード部の構成材料として使用し、該ナイロン系
アロイを無水マレイン酸で処理したエチレン−プロピレ
ン−ジエン系共重合体ゴム（以下、ＭＡＨ処理ＥＰＤＭ
ゴムと略す）を介して削り出し方式で成形した超高分子
量ポリエチレンシート（以下超高分子量ＰＥシートと略
す）に接着させると共に、この超高分子量ＰＥシートを
介してタイヤのゴム層に接着させたことを特徴とする。Means for Solving the Problems In the present invention which achieves the above objects, a nylon alloy is used as a constituent material of an inner liner and / or a bead portion, and the nylon alloy is treated with maleic anhydride to obtain ethylene. -Propylene-diene copolymer rubber (hereinafter referred to as MAH-treated EPDM
It was adhered to an ultra-high molecular weight polyethylene sheet (hereinafter abbreviated as ultra-high molecular weight PE sheet) formed by a shaving method via a rubber (abbreviated as rubber), and was also adhered to a rubber layer of a tire through the ultra-high molecular weight PE sheet. It is characterized by
【０００６】ナイロン系アロイは、ゴム比べて軽量であ
ると共に高い剛性を有しており、しかも耐屈曲性、耐ガ
ス透過性等に優れた特性を有している。このナイロン系
アロイは、ＭＡＨ処理ＥＰＤＭゴムを介して超高分子量
ＰＥシートに強固に接着させることができ、また、この
超高分子量ＰＥシートは未加硫ゴムに張り合わせて加硫
させることによりゴム層に対し強固に接着させることが
てきるようになる。したがって、このようなナイロン系
アロイをタイヤのインナーライナー及び／又はビード部
に使用すれば、軽量化しても剛性の低下を招くことはな
く、しかもその優れた耐ガス透過性により空気圧保持性
を向上することができる。[0006] Nylon alloys are lighter than rubber and have high rigidity, and have excellent properties such as flex resistance and gas permeation resistance. This nylon alloy can be firmly adhered to an ultra-high molecular weight PE sheet via MAH-treated EPDM rubber, and this ultra-high molecular weight PE sheet is bonded to an unvulcanized rubber and vulcanized to form a rubber layer. It becomes possible to firmly adhere to. Therefore, if such a nylon alloy is used for the inner liner and / or the bead portion of the tire, the rigidity is not reduced even if the weight is reduced, and the excellent gas permeation resistance improves the air pressure retention. can do.
【０００７】本発明において、削り出し方式で成形した
超高分子量ＰＥシートとは、超高分子量のポリエチレン
粉末を加熱加圧シンタリングして円柱状の成形物を作製
し、この成形物をその周方向に薄肉に削ってフィルム状
に切り出したものをいう。図１は、本発明の空気入りタ
イヤの１例を示す。１はトレッド部、２はサイドウォー
ル部、３はビード部、４はカーカス層である。カーカス
層４は、左右両側一対のビードコア６の廻りに、その両
端部がビードフィラー７を包み込むように折り返されて
いる。タイヤの最内側にはインナーライナー５がサイド
ウォール部２に対応する一部を除いて内貼りされてい
る。In the present invention, the ultra-high molecular weight PE sheet formed by the shaving method means that the ultra-high-molecular-weight polyethylene powder is sintered under heat and pressure to produce a columnar shaped article, and this shaped article is surrounded by the periphery thereof. It is cut into a film by shaving it in a thin direction. FIG. 1 shows an example of the pneumatic tire of the present invention. Reference numeral 1 is a tread portion, 2 is a sidewall portion, 3 is a bead portion, and 4 is a carcass layer. The carcass layer 4 is folded around a pair of left and right bead cores 6 so that both ends thereof enclose a bead filler 7. An inner liner 5 is adhered to the innermost side of the tire except for a part corresponding to the sidewall portion 2.
【０００８】上述のように構成されたタイヤ構造材料の
うち、インナーライナー５とビードフィラー７とはナイ
ロン系アロイから構成されている。これらナイロン系ア
ロイの本体がゴム層に対して接着する領域は、ＭＡＨ処
理ＥＰＤＭゴムを介して超高分子量ＰＥシートが接着さ
れ、さらにこの超高分子量ＰＥシートがゴム層に接着す
る構造になっている。Among the tire structural materials constructed as described above, the inner liner 5 and the bead filler 7 are made of nylon alloy. In the region where the body of these nylon alloys adheres to the rubber layer, the ultra high molecular weight PE sheet is adhered via the MAH-treated EPDM rubber, and this ultra high molecular weight PE sheet is adhered to the rubber layer. There is.
【０００９】インナーライナー５は、タイヤ内面の全体
に設けられていてもよいが、好ましくは図１に示す実施
例のように最も厳しい屈曲変形を受けるサイドウォール
部２に対応する一部の領域を除くようにすることが望ま
しい。このようにして得られたタイヤは、ゴムに比べて
比重が小さく、剛性が高いナイロン系アロイがタイヤ構
成材料として使用されているので、必要な剛性を維持し
ながら軽量化することができる。また、ナイロン系アロ
イは、高い耐ガス透過性を有するため空気圧保持性を向
上することができる。The inner liner 5 may be provided on the entire inner surface of the tire, but it is preferable that a part of the inner liner 5 corresponding to the sidewall portion 2 which undergoes the most severe bending deformation as in the embodiment shown in FIG. It is desirable to exclude it. The thus obtained tire uses a nylon alloy having a smaller specific gravity and a higher rigidity than rubber as a tire constituent material, so that it is possible to reduce the weight while maintaining the required rigidity. Further, the nylon alloy has a high gas permeation resistance and thus can improve air pressure retention.
【００１０】上記ナイロン系アロイとしては、ナイロン
６、ナイロン１１、ナイロン６６、ナイロン４６及びそ
れらの共重合体等のナイロン系樹脂から選ばれた少なく
とも２種類の樹脂混合物から得られるものがある。この
ナイロン系アロイには、前記ナイロン系樹脂以外のポリ
アミド系樹脂並びにポリオレフィン系樹脂を含有するこ
とができる。具体例としては、ナイロン１１を少なくと
も６０重量％以上、ナイロン６等の前記ナイロン１１以
外のポリアミド系樹脂を４０重量％未満含有するナイロ
ン系アロイや、ナイロン６及びナイロン６−６６共重合
体の少なくとも１種を４０〜８０重量部、ナイロン１１
を５〜３０重量部、ポリオレフィン系樹脂を１０〜４０
重量部含有する耐ガス透過性に優れたナイロン系アロイ
を挙げることができる。上記ポリオレフィン系樹脂とし
ては、例えばポリエチレン、ポリプロピレン、ＥＰＤＭ
のようなα−オレフィン共重合体等並びにそれらのマレ
イン酸付加物等がある。The above nylon alloys include those obtained from a mixture of at least two kinds of resins selected from nylon resins such as nylon 6, nylon 11, nylon 66, nylon 46 and copolymers thereof. This nylon alloy may contain a polyamide resin and a polyolefin resin other than the nylon resin. As a specific example, at least 60% by weight or more of nylon 11 and less than 40% by weight of polyamide resin other than nylon 11 such as nylon 6 or the like, or at least nylon 6 and nylon 6-66 copolymer are included. 40-80 parts by weight of one kind, nylon 11
5 to 30 parts by weight, and polyolefin resin 10 to 40
An example is a nylon alloy that is contained in parts by weight and has excellent gas permeation resistance. Examples of the polyolefin resin include polyethylene, polypropylene, EPDM
.Alpha.-olefin copolymers and the like and maleic acid adducts thereof.
【００１１】また、超高分子量ＰＥシートは、削り出し
方式により成形したものであり、ゴム材料に対して優れ
た接着性を有すると共に、柔軟で耐屈曲性に優れてお
り、しかも高結晶性であるため引張強度、引張弾性率、
寸法安定性、耐ガス透過性、耐水性等の多くの優れた性
質を有する。このような超高分子量ＰＥシートは、望ま
しくは分子量が少なくとも１００万のポリエチレンから
形成するのがよい。１００万以上であることによってゴ
ム材料に対する熱融着による接着性が向上する。また、
その厚さは、２０〜２００μｍの範囲の範囲であること
が望ましい。この厚さを２０μｍ以上とすることにより
強固な接着性が得られる。また、２００μｍ以下とする
ことにより柔軟で可撓性に優れた接着部分を形成するよ
うにする。The ultra-high molecular weight PE sheet is formed by a shaving method, has excellent adhesiveness to a rubber material, is flexible and has excellent flex resistance, and has high crystallinity. Because of its tensile strength, tensile modulus,
It has many excellent properties such as dimensional stability, gas permeation resistance, and water resistance. Such ultra high molecular weight PE sheets are preferably formed from polyethylene having a molecular weight of at least 1 million. When it is 1 million or more, the adhesiveness to the rubber material by heat fusion is improved. Also,
The thickness is preferably in the range of 20 to 200 μm. By setting the thickness to 20 μm or more, strong adhesiveness can be obtained. Further, by setting the thickness to 200 μm or less, a soft and excellent adhesive portion is formed.
【００１２】上記ナイロン系アロイは、ＭＡＨ処理ＥＰ
ＤＭゴムを介して超高分子量ＰＥシートを接着してい
る。このＭＡＨ処理ＥＰＤＭゴムが介在しないときは、
ナイロン系アロイは超高分子量ＰＥシートと接着するこ
とができなくなり、この超高分子量ＰＥシートを介して
ゴム層に接着させることができなくなる。また、ナイロ
ン系アロイには、その片側表面だけでなく両側表面にＭ
ＡＨ処理ＥＰＤＭゴムを介して超高分子量ＰＥシートを
接着させることができる。The above nylon alloy is a MAH treated EP
An ultra high molecular weight PE sheet is bonded via DM rubber. When this MAH-treated EPDM rubber is not present,
The nylon alloy cannot adhere to the ultra high molecular weight PE sheet, and cannot adhere to the rubber layer via the ultra high molecular weight PE sheet. Nylon alloys have M on both surfaces as well as one surface.
Ultra high molecular weight PE sheets can be bonded via AH treated EPDM rubber.
【００１３】このようなナイロン系アロイと超高分子量
ＰＥシートとの積層体は、次のようにして作製すること
ができる。即ち、ナイロン系アロイを所定の形状の構成
材料に成形し、これと超高分子量ＰＥシートとのそれぞ
れ表面に、ＭＡＨ処理ＥＰＤＭゴム溶液を塗布乾燥した
後、このＭＡＨ処理ＥＰＤＭゴムが付着した両表面同士
を重ね合わせて加熱接着することにより得られる。上記
ＭＡＨ処理ＥＰＤＭゴム溶液としては、例えばノルマル
ヘキサン、トルエン、キシレン等の有機溶剤に、その濃
度が０．５〜４０重量％の範囲になるように溶解したも
のを使用するのがよい。また、このＭＡＨ処理ＥＰＤＭ
ゴムの付着面同士を重ね合わせて加熱する際の温度は、
ナイロン系アロイの融点以上、好ましくは２００℃以上
で、超高分子量ＰＥシートが熱劣化する温度以下、好ま
しくは３００℃以下の範囲にするのがよい。A laminate of such a nylon alloy and an ultra high molecular weight PE sheet can be manufactured as follows. That is, a nylon alloy is molded into a constituent material having a predetermined shape, and a MAH-treated EPDM rubber solution is applied and dried on the surfaces of the nylon alloy and the ultra-high molecular weight PE sheet, respectively. It is obtained by stacking and bonding them by heating. As the MAH-treated EPDM rubber solution, it is preferable to use one dissolved in an organic solvent such as normal hexane, toluene or xylene so that the concentration thereof is in the range of 0.5 to 40% by weight. Also, this MAH treated EPDM
The temperature at which the rubber-attached surfaces are stacked and heated is
The melting point of the nylon alloy is preferably not lower than 200 ° C, and is not higher than the temperature at which the ultra high molecular weight PE sheet is thermally deteriorated, preferably not higher than 300 ° C.
【００１４】また、このナイロン系アロイを使用した空
気入りタイヤは、ナイロン系アロイの超高分子量ＰＥシ
ート面に未加硫のゴム組成物からなる構成材料をラミネ
ートして所定のグリーンタイヤを作製し、常法に従い、
金型を用いて加硫成形することにより製造することがで
きる。この場合、ナイロン系アロイの超高分子量ＰＥシ
ート面にラミネートする構成材料は、未加硫ゴム組成物
からなるもの又は加硫ゴムからなるもののいずれであっ
てもい。しかし、構成材料が未加硫のゴム組成物からな
る場合は、臨界表面張力γc が２５〜３５ミリニュート
ン／メートル（以下ｍＮ／ｍと略す）の原料ゴムを含有
するゴム組成物から構成することが望ましい。この臨界
表面張力γc が上記範囲の原料ゴムを含有するゴム組成
物を使用することにより、超高分子量ＰＥシートに対す
る接着性を向上した構成材料を得ることができる。A pneumatic tire using this nylon alloy is produced by laminating a constituent material of an unvulcanized rubber composition on the surface of a nylon alloy ultra high molecular weight PE sheet to prepare a predetermined green tire. , According to the usual method,
It can be manufactured by vulcanization molding using a mold. In this case, the constituent material to be laminated on the ultra high molecular weight PE sheet surface of the nylon alloy may be either an unvulcanized rubber composition or a vulcanized rubber. However, when the constituent material is an unvulcanized rubber composition, it must be composed of a rubber composition containing a raw material rubber having a critical surface tension γc of 25 to 35 millinewtons / meter (hereinafter abbreviated as mN / m). Is desirable. By using the rubber composition containing the raw material rubber having the critical surface tension γc in the above range, a constituent material having improved adhesiveness to the ultrahigh molecular weight PE sheet can be obtained.
【００１５】本発明において、上記臨界表面張力γc と
は、昭和53年８月20日（第３刷）丸善株式会社発行「化
学便覧」基礎編II、第６１８頁に記載されているよう
に、固体面上で液体炭化水素その他の有機液体化合物の
同族列が示す接触角をθ、その液体の表面張力をγとす
ると、cos θとγとの関係は同族体の種類に関せず大体
一本の直線となる。このとき、θ＝０、すなわちcos θ
＝１に相当するγc の値をいうと定義されている。本発
明に定義する原料ゴムの臨界表面張力γc は、上記固体
の代わりに、原料ゴムを加熱プレスして平坦にしたゴム
サンプルを使用して同様に測定した値をいう。In the present invention, the above-mentioned critical surface tension γc is as described in “Chemical Handbook”, Basic Edition II, page 618, published by Maruzen Co., Ltd., August 20, 1978 (3rd printing). If the contact angle of a homologous series of liquid hydrocarbons and other organic liquid compounds on a solid surface is θ and the surface tension of the liquid is γ, the relationship between cos θ and γ is almost the same regardless of the type of homologue. It becomes the straight line of the book. At this time, θ = 0, that is, cos θ
It is defined to mean the value of γc corresponding to = 1. The critical surface tension γc of the raw material rubber defined in the present invention means a value similarly measured by using a rubber sample obtained by heating and pressing the raw material rubber in place of the above solid.
【００１６】上記範囲の臨界表面張力γc を有する原料
ゴムとしては、米国マーセル・デッカー社（Marcel Dek
ker, Inc., New York and Basel)１９８８年発行の“ハ
ンドブック・オブ・エラストマーズ ニューデベロップ
メント・アンド・テクノロジー”（Handbook of Elasto
mers New Development and Technology)：エーケー，ボ
ーミック及びエッチエル，ステファンズ（A, K, Bhowmi
k and H, L, Stephens）著、第８章第２５３頁の表１に
記載されている、イソブチレン−イソプレン共重合体ゴ
ム（ＩＩＲ，γc ＝２７ｍＮ／ｍ）、エチレン−プロピ
レンジエン三元共重合体ゴム（ＥＰＤＭ，γc ＝２８ｍ
Ｎ／ｍ）、天然ゴム（ＮＲ，γc ＝３１ｍＮ／ｍ）、ポ
リブタジエンゴム（ＢＲ，γc ＝３２ｍＮ／ｍ）、スチ
レン−ブタジエン共重合体ゴム（ＳＢＲ，γc ＝３３ｍ
Ｎ／ｍ）等がある。As a raw material rubber having a critical surface tension γc in the above range, Marcel Dek
ker, Inc., New York and Basel) "Handbook of Elastomers New Development and Technology" (Handbook of Elasto)
mers New Development and Technology): AK, Baumic and Etchell, Stephens (A, K, Bhowmi
k and H, L, Stephens), isobutylene-isoprene copolymer rubber (IIR, γc = 27 mN / m), ethylene-propylenediene ternary co-weight as described in Table 1 of Chapter 8, page 253. Combined rubber (EPDM, γc = 28m
N / m), natural rubber (NR, γc = 31 mN / m), polybutadiene rubber (BR, γc = 32 mN / m), styrene-butadiene copolymer rubber (SBR, γc = 33 m)
N / m) etc.
【００１７】また、構成材料が加硫ゴムからなる場合
は、原料ゴムの架橋により前述した臨界表面張力γc が
増大し、超高分子量ＰＥシート（γc ＝２９ｍＮ／ｍ）
との臨界表面張力γc の差が大きくなり過ぎて、構成材
料の超高分子量ＰＥシートに対する接着性が低下する。
このため、構成材料が加硫ゴムからなる場合は、加硫前
の未加硫のゴム組成物からなる構成材料の表面に、別の
超高分子量ＰＥシートを張り合わせて、前記未加硫のゴ
ム組成物の加硫開始温度以上で、かつ超高分子量ＰＥシ
ートの融点（１２５℃）以上、好ましくは１３０℃〜３
００℃の温度に加熱し、加硫と同時に熱接着することが
望ましい。この加硫ゴムからなる構成材料の超高分子量
ＰＥシート面と、本発明のナイロン系アロイの超高分子
量ＰＥシート面とラミネートさせて熱接着することによ
り強固に接着することができる。また、未加硫のゴム組
成物からなる構成材料と同様に、臨界表面張力γc が２
５〜３５ｍＮ／ｍの原料ゴムを含有するゴム組成物を使
用することができる。When the constituent material is a vulcanized rubber, the above-mentioned critical surface tension γc increases due to the crosslinking of the raw rubber, and the ultra high molecular weight PE sheet (γc = 29 mN / m)
The difference in the critical surface tension γc from the above becomes too large, and the adhesion of the constituent material to the ultra high molecular weight PE sheet decreases.
Therefore, when the constituent material is a vulcanized rubber, another ultra-high molecular weight PE sheet is attached to the surface of the constituent material made of an unvulcanized rubber composition before vulcanization, to form the unvulcanized rubber. Above the vulcanization start temperature of the composition and above the melting point (125 ° C.) of the ultra high molecular weight PE sheet, preferably 130 ° C. to 3
It is desirable to heat to a temperature of 00 ° C. and heat bond at the same time as vulcanization. The ultra-high molecular weight PE sheet surface of the constituent material made of this vulcanized rubber and the ultra-high molecular weight PE sheet surface of the nylon alloy of the present invention can be laminated and heat-bonded to firmly bond. In addition, the critical surface tension γc is 2 as in the case of the constituent material composed of the unvulcanized rubber composition.
A rubber composition containing a raw rubber of 5 to 35 mN / m can be used.
【００１８】[0018]
【実施例】次の２種類の本発明タイヤ及び比較タイヤを
製作した。これらのタイヤのタイヤサイズはいずれも同
一の１６５ＳＲ１３とした。 本発明タイヤ：図１に示すタイヤの最内側のサイドウォ
ール部２に対応する一部を除いたインナーライナー５と
ビードフィラー７を、ナイロン６を７０重量部、ナイロ
ン１１を１５重量部及びＥＰＤＭを１５重量部からなる
ナイロンアロイから構成したグリーンタイヤを製作し、
金型を用いて常法にしたがって加硫成形した。EXAMPLES The following two types of tires of the present invention and comparative tires were manufactured. The tire size of each of these tires was the same, 165SR13. Tire of the present invention: Inner liner 5 and bead filler 7 excluding a part corresponding to the innermost side wall portion 2 of the tire shown in FIG. 1, 70 parts by weight of nylon 6, 15 parts by weight of nylon 11 and EPDM. We made a green tire composed of 15 parts by weight of nylon alloy,
Vulcanization molding was carried out using a mold according to a conventional method.
【００１９】インナーライナー５は、上記ナイロンアロ
イを厚さが４００μｍのシートに成形し、その表面及び
削り出し方式により成形した平均分子量が５５０万のポ
リエチレンからなる厚さ５０μｍのシートとの表面に、
三井石油化学社製のＭＡＨ処理ＥＰＤＭゴム（タフマー
ＭＰ−０６１０）の１．０重量％ノルマルヘキサン溶液
を塗布し、２０℃で６０分間乾燥した後、これら両シー
トのＭＡＨ処理ＥＰＤＭゴム付着面同士を重ね合わせて
２０ｋｇ／ｃｍ2 の加圧下、１５０℃で２０分間加熱し
て熱接着したものを使用した。 比較タイヤ：インナーライナー５として、約７００μｍ
の厚さのタイゴムを介して約５００μｍの厚さの未加硫
ブチルゴムをタイヤの最内側全面に設け、ビードフィラ
ー７として、通常の天然ゴム配合物を使用した以外は、
本発明タイヤと同じ構成のグリーンタイヤを製作し加硫
成形した。The inner liner 5 is formed by molding the above nylon alloy into a sheet having a thickness of 400 μm, and the surface thereof and a sheet having a thickness of 50 μm formed of polyethylene having an average molecular weight of 5.5 million by the shaving method.
A 1.0% by weight normal hexane solution of MAH-treated EPDM rubber (Toughmer MP-0610) manufactured by Mitsui Petrochemical Co., Ltd. was applied and dried at 20 ° C. for 60 minutes, and then the MAH-treated EPDM rubber-adhered surfaces of both sheets were joined together. The pieces were heat-bonded by heating them at 150 ° C. for 20 minutes under a pressure of 20 kg / cm 2 . Comparative tire: about 700 μm as inner liner 5
The unvulcanized butyl rubber having a thickness of about 500 μm is provided on the entire innermost surface of the tire through the tie rubber having the thickness of, and a normal natural rubber compound is used as the bead filler 7.
A green tire having the same structure as the tire of the present invention was manufactured and vulcanization molded.
【００２０】これら２種類の本発明タイヤと比較タイヤ
について、それぞれインナーライナーとビードフィラー
との重量を算出し比較したところ、本発明タイヤは比較
タイヤに比べて約５０％も重量が小さくタイヤの軽量化
されていた。また、本発明タイヤと比較タイヤについ
て、下記方法により空気漏れ試験を行った。空気漏れ試験 ：室温２１℃で、タイヤ（静止状態）を標
識リムに装着した後、内圧２．０ｋｇｆ／ｃｍ2 で４８
時間放置し、内圧を２．０ｋｇｆ／ｃｍ2 に再調整す
る。再調整直後を測定開始の時間の起点として４８時間
経過毎に３ケ月にわたって内圧を測定する。When the weights of the inner liner and the bead filler were calculated and compared between these two kinds of tires of the present invention and the comparative tire, the tire of the present invention has a weight of about 50% smaller than that of the comparative tire and a light weight of the tire. It was converted. An air leak test was conducted on the tire of the present invention and the comparative tire by the following method. Air leak test : At room temperature of 21 ° C., after mounting the tire (stationary state) on the sign rim, the internal pressure was 48 kgf / cm 2 .
Allow to stand for an hour and readjust the internal pressure to 2.0 kgf / cm 2 . Immediately after readjustment, the internal pressure is measured every 48 hours for 3 months, starting from the time of measurement start.
【００２１】測定データを最小二乗法でｙ -βt に回帰
し、ｔ＝時間（日）、ｙ＝内圧（測定内圧／２．０）と
し、空気漏れ係数βを求める。ｔ＝３０日を代入して１
ケ月当たりの内圧低下率（Ｚ）を下式に従って算出す
る。 Ｚ（％／月）＝（１−ｅ -β .30）×１００ その結果、比較タイヤの内圧低下率（Ｚ）＝２．６％に
対し、本発明タイヤの内圧低下率（Ｚ）＝２．０％であ
り、空気圧保持性に優れていた。The measured data is regressed to y - β t by the least squares method, and t = time (day), y = internal pressure (measured internal pressure / 2.0), and the air leakage coefficient β is obtained. Substituting 30 days for t = 1
The internal pressure decrease rate (Z) per month is calculated according to the following formula. Z (% / month) = (1−e − β .30 ) × 100 As a result, the internal pressure decrease rate (Z) of the tire of the present invention (Z) = 2 while the internal pressure decrease rate (Z) of the comparative tire was 2.6%. It was 0.0% and was excellent in air pressure retention.
【００２２】[0022]
【発明の効果】本発明によれば、耐ガス透過性に優れ、
低比重、高剛性のたナイロン系アロイをインナーライナ
ー及び／又はビード部に適用したので、必要な剛性を維
持しながら軽量化を可能にし、しかも空気圧保持性を向
上することができる。また、ナイロン系アロイとゴム層
との接着構造を、このナイロン系アロイにＭＡＨ処理Ｅ
ＰＤＭゴムを介して超高分子量ＰＥシートを接着し、こ
の超高分子量ＰＥシートをゴム層に接着するようにした
ので、ナイロン系アロイをタイヤのゴム層に強固に接着
させることが可能になり、空気入りタイヤを軽量化する
ことができる。According to the present invention, the gas permeation resistance is excellent,
Since the nylon alloy having low specific gravity and high rigidity is applied to the inner liner and / or the bead portion, it is possible to reduce the weight while maintaining the required rigidity and improve the air pressure retention. In addition, the adhesive structure between the nylon alloy and the rubber layer was applied to this nylon alloy by MAH treatment E
Since the ultra high molecular weight PE sheet is adhered via the PDM rubber and the ultra high molecular weight PE sheet is adhered to the rubber layer, it becomes possible to firmly adhere the nylon alloy to the rubber layer of the tire, It is possible to reduce the weight of a pneumatic tire.
【図１】本発明の空気入りタイヤの１例を示す半断面図
である。FIG. 1 is a half sectional view showing an example of a pneumatic tire of the present invention.
３ ビード部 ５ インナーライナー ７ ビードフィラー 3 Bead part 5 Inner liner 7 Bead filler
Claims (1)
び／又はビード部の構成材料として使用し、該ナイロン
系アロイを無水マレイン酸で処理したエチレン−プロピ
レン−ジエン系共重合体ゴムを介して削り出し方式で成
形した超高分子量ポリエチレンシートに接着させると共
に、該超高分子量ポリエチレンシートを介してタイヤの
ゴム層に接着させた空気入りタイヤ。1. A method in which a nylon alloy is used as a constituent material of an inner liner and / or a bead portion, and the nylon alloy is carved out through an ethylene-propylene-diene copolymer rubber treated with maleic anhydride. A pneumatic tire which is adhered to the ultra-high molecular weight polyethylene sheet molded in (1) and is adhered to the rubber layer of the tire through the ultra-high molecular weight polyethylene sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344619A JP3054968B2 (en) | 1991-12-26 | 1991-12-26 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344619A JP3054968B2 (en) | 1991-12-26 | 1991-12-26 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05169909A true JPH05169909A (en) | 1993-07-09 |
| JP3054968B2 JP3054968B2 (en) | 2000-06-19 |
Family
ID=18370667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3344619A Expired - Fee Related JP3054968B2 (en) | 1991-12-26 | 1991-12-26 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054968B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740702A (en) * | 1993-07-31 | 1995-02-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire and manufacture thereof |
| JPH07186608A (en) * | 1993-12-28 | 1995-07-25 | Sumitomo Rubber Ind Ltd | Steel radial tire for passenger car |
| WO1996034736A1 (en) * | 1995-05-02 | 1996-11-07 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tires |
| US6024816A (en) * | 1995-01-27 | 2000-02-15 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for production thereof |
| US6079465A (en) * | 1995-01-23 | 2000-06-27 | The Yokohama Rubber Co., Ltd. | Polymer composition for tire and pneumatic tire using same |
| US6079466A (en) * | 1995-03-15 | 2000-06-27 | The Yokohama Rubber Co., Ltd. | Pneumatic tire with air permeation prevention layer |
| JP2004042822A (en) * | 2002-07-12 | 2004-02-12 | Daicel Degussa Ltd | Rubber reinforced structure |
| WO2005047025A1 (en) * | 2003-11-17 | 2005-05-26 | Akihiro Yamamoto | Pneumatic tire and process for producing the same |
| WO2008051253A1 (en) * | 2006-10-26 | 2008-05-02 | Exxonmobil Chemical Patents Inc. | Low moisture permeability laminate construction |
| WO2009110600A1 (en) * | 2008-03-07 | 2009-09-11 | 横浜ゴム株式会社 | Pneumatic tire and process for producing the same |
| CN101856956A (en) * | 2010-06-22 | 2010-10-13 | 森泰达集团有限公司 | Aircraft tire bead structure |
| CN103897383A (en) * | 2007-01-18 | 2014-07-02 | 横滨橡胶株式会社 | Polyamide resin composition with excellent ductility and flexible fatigability, and pneumatic tire and flexible pipe using same |
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| KR101530771B1 (en) | 2013-06-21 | 2015-06-22 | 유성주 | Pad for heel insult and the lamination method of the same |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740702A (en) * | 1993-07-31 | 1995-02-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire and manufacture thereof |
| JPH07186608A (en) * | 1993-12-28 | 1995-07-25 | Sumitomo Rubber Ind Ltd | Steel radial tire for passenger car |
| US6079465A (en) * | 1995-01-23 | 2000-06-27 | The Yokohama Rubber Co., Ltd. | Polymer composition for tire and pneumatic tire using same |
| US6334919B1 (en) | 1995-01-23 | 2002-01-01 | The Yokohama Rubber Co., Ltd. | Polymer composition for tire and pneumatic tire using same |
| EP0722850B2 (en) † | 1995-01-23 | 2004-05-26 | The Yokohama Rubber Co., Ltd. | Polymer composition for tire and pneumatic tire using same |
| US6024816A (en) * | 1995-01-27 | 2000-02-15 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for production thereof |
| US6179941B1 (en) | 1995-01-27 | 2001-01-30 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for production thereof |
| US6244317B1 (en) | 1995-01-27 | 2001-06-12 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for production thereof |
| US6079466A (en) * | 1995-03-15 | 2000-06-27 | The Yokohama Rubber Co., Ltd. | Pneumatic tire with air permeation prevention layer |
| WO1996034736A1 (en) * | 1995-05-02 | 1996-11-07 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tires |
| US6136123A (en) * | 1995-05-02 | 2000-10-24 | The Yokohama Rubber Co., Ltd. | Process of production of pneumatic tire |
| US6402867B1 (en) * | 1995-05-02 | 2002-06-11 | The Yokohama Rubber Co., Ltd. | Process of production of pneumatic tire |
| WO2004018234A1 (en) * | 2002-07-12 | 2004-03-04 | Daicel-Degussa Ltd. | Rubber-reinforced structure |
| JP2004042822A (en) * | 2002-07-12 | 2004-02-12 | Daicel Degussa Ltd | Rubber reinforced structure |
| JP4502569B2 (en) * | 2002-07-12 | 2010-07-14 | ダイセル・エボニック株式会社 | Rubber reinforcement structure |
| WO2005047025A1 (en) * | 2003-11-17 | 2005-05-26 | Akihiro Yamamoto | Pneumatic tire and process for producing the same |
| WO2008051253A1 (en) * | 2006-10-26 | 2008-05-02 | Exxonmobil Chemical Patents Inc. | Low moisture permeability laminate construction |
| US8960250B2 (en) | 2006-10-26 | 2015-02-24 | The Yokohama Rubber Co., Ltd. | Low moisture permeability laminate construction |
| US10427457B2 (en) | 2006-10-26 | 2019-10-01 | Exxonmobil Chemical Patents Inc. | Low moisture permeability laminate construction |
| CN103897383A (en) * | 2007-01-18 | 2014-07-02 | 横滨橡胶株式会社 | Polyamide resin composition with excellent ductility and flexible fatigability, and pneumatic tire and flexible pipe using same |
| WO2009110600A1 (en) * | 2008-03-07 | 2009-09-11 | 横浜ゴム株式会社 | Pneumatic tire and process for producing the same |
| CN101965270A (en) * | 2008-03-07 | 2011-02-02 | 横滨橡胶株式会社 | Pneumatic tire and process for producing the same |
| US10421318B2 (en) | 2008-03-07 | 2019-09-24 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for producing the same |
| CN101856956A (en) * | 2010-06-22 | 2010-10-13 | 森泰达集团有限公司 | Aircraft tire bead structure |
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