JP2002079804A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JP2002079804A JP2002079804A JP2000271659A JP2000271659A JP2002079804A JP 2002079804 A JP2002079804 A JP 2002079804A JP 2000271659 A JP2000271659 A JP 2000271659A JP 2000271659 A JP2000271659 A JP 2000271659A JP 2002079804 A JP2002079804 A JP 2002079804A
- Authority
- JP
- Japan
- Prior art keywords
- air
- tire
- layer
- impermeable layer
- pneumatic tire
- 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
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気入りタイヤに
関し、内圧保持性を損なうことなく、タイヤの重量を軽
減する技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire and, more particularly, to a technique for reducing the weight of a tire without impairing internal pressure retention.
【０００２】[0002]
【従来の技術】従来、タイヤの内圧保持のために、空気
バリア層としてのインナーライナーの主原料にブチルゴ
ム、ハロゲン化ブチルゴムなどを使用している。しかし
ながら、これらを配合したゴム組成物では、その空気バ
リア性が低いために、インナーライナーの厚さが1mm前
後必要であった。このようなインナーライナーを使用す
ると、内圧保持のためだけに数百グラム、タイヤ重量が
増加し、タイヤ軽量化の妨げとなっている。2. Description of the Related Art Conventionally, butyl rubber, halogenated butyl rubber, or the like has been used as a main raw material of an inner liner as an air barrier layer to maintain the internal pressure of a tire. However, in the rubber composition containing these, the thickness of the inner liner was required to be about 1 mm because of its low air barrier property. When such an inner liner is used, the tire weight is increased by several hundred grams only for maintaining the internal pressure, which hinders a reduction in the weight of the tire.
【０００３】ところで、ブチルゴム、ハロゲン化ブチル
ゴムよりも空気透過性の低い材質として、多くの熱可塑
性樹脂がある。例えばナイロン等の空気透過性はブチル
ゴムやハロゲン化ブチルゴムに比べて10分の1以下であ
る。しかし、ナイロンは弾性率が高いため、ナイロン製
のインナーライナーはタイヤ転動時の変形に追従でき
ず、割れ等を生じ、この割れ目から空気漏れが起こり、
内圧を保持できない。また、特開平２０００−１７７３
０７号公報においては、エチレン・ビニルアルコール共
重合体よりなる空気不透過性層を設けたことを特徴とす
るチューブレスタイヤについての記載がある。しかし、
このエチレン・ビニルアルコール共重合体は、融点が比
較的低く１８０℃以下となってしまうものもあり、タイ
ヤ加硫時に溶融し、均一な空気不透過性層を得られない
場合がある。また、ポリビニルアルコールは湿度の影響
を受けやすく、分子設計上の物性は充分であっても、加
硫温度下での強力低下などを生じることがある。Incidentally, there are many thermoplastic resins as materials having lower air permeability than butyl rubber and halogenated butyl rubber. For example, the air permeability of nylon or the like is one-tenth or less than that of butyl rubber or halogenated butyl rubber. However, nylon has a high elastic modulus, so the nylon inner liner cannot follow the deformation during rolling of the tire, causing cracks, etc., and air leakage occurs from these cracks,
The internal pressure cannot be maintained. Also, Japanese Patent Laid-Open No. 2000-1773
In JP-A-07-2007, there is a description of a tubeless tire having an air-impermeable layer made of an ethylene / vinyl alcohol copolymer. But,
Some of the ethylene / vinyl alcohol copolymers have a relatively low melting point and become 180 ° C. or lower, and may be melted during vulcanization of the tire, so that a uniform air-impermeable layer may not be obtained. Further, polyvinyl alcohol is susceptible to the influence of humidity, and even if the physical properties in molecular design are sufficient, the strength may be lowered at the vulcanization temperature.
【０００４】[0004]
【発明が解決しようとする課題】本発明はインナーライ
ナー等の内圧保持技術を改良して、タイヤの軽量化を図
ることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to improve the technology for maintaining the internal pressure of an inner liner or the like to reduce the weight of a tire.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の空気入りタイヤは以下の構成とする。すな
わち、架橋されたポリビニルアルコールまたは架橋され
たエチレン・ビニルアルコール共重合体よりなる空気不
透過性層を具えてなることを特徴とする。好ましくは、
前記空気不透過性層の厚さが30μｍ以下である。また、
前記空気不透過性層に隣接して空気透過係数1.0×10-9
cm3・cm / cm2・sec・ cmHg以下のエラストマーよりな
る補助層をさらに具えることを特徴とする。好ましく
は、前記空気不透過性層が前記補助層に接着されてな
る。また、好ましくは、前記補助層の厚さが50〜500μ
ｍである。In order to achieve the above object, the pneumatic tire of the present invention has the following constitution. That is, an air-impermeable layer made of cross-linked polyvinyl alcohol or cross-linked ethylene / vinyl alcohol copolymer is provided. Preferably,
The thickness of the air impermeable layer is 30 μm or less. Also,
Air permeability coefficient 1.0 × 10 -9 adjacent to the air impermeable layer
It is characterized by further comprising an auxiliary layer made of an elastomer of not more than cm 3 · cm / cm 2 · sec · cmHg. Preferably, the air impermeable layer is adhered to the auxiliary layer. Preferably, the thickness of the auxiliary layer is 50 to 500 μm.
m.
【０００６】[0006]
【発明の実施の形態】空気透過性を低下させるために
は、ポリビニルアルコールやエチレン・ビニルアルコー
ル共重合体［エバール（エチレン酢酸ビニル共重合体エ
マルジョン）から酢酸を除いて使用する］が非常に有効
である。これらの（共）重合体の空気透過係数は、従来
のブチル系ゴム組成物の100分の1以下であるため、内圧
保持に必要な厚さは100分の1以下で足りる。さらに、本
発明で用いるポリビニルアルコールやエチレン・ビニル
アルコール共重合体はポリマー分子を架橋させているた
め、加硫の熱がかかっても溶融することがなく、所望の
タイヤ性能を確実に得ることができる。なお、これらの
（共）重合体以外にも、従来のブチル系ゴム組成物より
空気透過係数の小さい樹脂は数多く存在するが、例えば
空気透過性がブチル系ゴムの10分の1程度の場合、イン
ナーライナーとして100μm前後の厚さが内圧維持のため
に必要となる。この厚さのフィルムは、タイヤ転動時の
屈曲の変形により破断してしまう。また、タイヤ製造時
にかかる伸長に追従し難い。BEST MODE FOR CARRYING OUT THE INVENTION In order to reduce air permeability, polyvinyl alcohol or an ethylene / vinyl alcohol copolymer [used by removing acetic acid from Eval (ethylene-vinyl acetate copolymer emulsion)] is very effective. It is. Since the air permeability coefficient of these (co) polymers is 1/100 or less of the conventional butyl rubber composition, the thickness required for maintaining the internal pressure is 1/100 or less. Furthermore, since the polyvinyl alcohol and the ethylene / vinyl alcohol copolymer used in the present invention have crosslinked polymer molecules, they do not melt even when the vulcanization heat is applied, so that desired tire performance can be reliably obtained. it can. In addition, besides these (co) polymers, there are many resins having a smaller air permeability coefficient than the conventional butyl rubber composition. For example, when the air permeability is about 1/10 of that of the butyl rubber, A thickness of about 100 μm is required for the inner liner to maintain the internal pressure. A film having this thickness breaks due to bending deformation during rolling of the tire. Further, it is difficult to follow the elongation during tire production.
【０００７】これに対して、ポリビニルアルコールやエ
チレン・ビニルアルコール共重合体によるフィルムは、
10μｍ程度の厚さで効果があるので、タイヤの転動時の
屈曲変形による破断が生じ難くなる。この観点から空気
不透過性層の厚さは３０μｍ以下が好ましい。ポリビニ
ルアルコールやエチレン・ビニルアルコール共重合体
は、-OH基を有するので、隣接ゴム部材との接着を比較
的容易に確保できる。例えば、タイヤに使用されている
不飽和系ゴム組成物との接着を確保するには、塩化ゴム
・イソシアネート系の接着剤を用いればよい。一方、PV
DC（ポリビニリデンクロライド）も空気不透過性樹脂と
して知られ、内圧保持の必要厚さを薄くできるが、本発
明の樹脂と比較すると接着性が劣る。On the other hand, a film made of polyvinyl alcohol or an ethylene / vinyl alcohol copolymer is
Since the effect is obtained with a thickness of about 10 μm, breakage due to bending deformation at the time of rolling of the tire hardly occurs. From this viewpoint, the thickness of the air impermeable layer is preferably 30 μm or less. Since polyvinyl alcohol and ethylene / vinyl alcohol copolymer have an -OH group, adhesion to an adjacent rubber member can be relatively easily secured. For example, in order to secure the adhesion with the unsaturated rubber composition used for the tire, a chlorinated rubber / isocyanate-based adhesive may be used. Meanwhile, PV
DC (polyvinylidene chloride) is also known as an air-impermeable resin and can reduce the required thickness for holding the internal pressure, but is inferior in adhesiveness as compared with the resin of the present invention.
【０００８】このように、本発明の（共）重合体は、隣
接部材との接着性が良いので、たとえ、フィルムが破断
しても剥離し難く、内圧保持性が高い。上記の空気不透
過性層の他に、この空気不透過性層に隣接して、この層
の反空気充填側または空気充填側に、空気透過係数1.0
×10-9 cm3 ・cm / cm2 ・sec・cmHg以下のエラストマ
ーよりなる補助層をさらに具えると好ましい。この理由
は、前記空気不透過性層にピンホールやクラック等が生
じた場合に、この補助層により内圧を保持するためであ
る。このとき、空気不透過性層が補助層に接着されてい
るほうが、剥がれ難く、空気を包むほとんどの面に空気
不透過性層がそのまま存在し、内圧保持機能を発揮し続
けるので好ましい。その場合の補助層の厚さは、従来の
ブチル系ゴムのインナーライナーの厚さ１ｍｍ程度より
薄くでき、充分な重量低減が可能である。好ましくは、
前記補助層の厚さが50〜500μｍである。これは、50μm
未満では、製造が困難であることと、たとえ製造できた
としてもガスバリアの効果が小さく、また、500μmを超
えると、タイヤの重量低減効果が得られないからであ
る。As described above, since the (co) polymer of the present invention has good adhesiveness to an adjacent member, it does not easily peel off even if the film is broken, and has high internal pressure retention. In addition to the air-impermeable layer described above, adjacent to and adjacent to the air-impermeable layer, an air permeability coefficient of 1.0
× preferred 10 -9 cm 3 · cm / cm 2 · sec · cmHg further comprising the more becomes auxiliary layer following elastomers. The reason for this is that when pinholes, cracks, and the like occur in the air-impermeable layer, the auxiliary layer maintains the internal pressure. At this time, it is preferable that the air-impermeable layer is adhered to the auxiliary layer because the air-impermeable layer is hardly peeled off, the air-impermeable layer is present on almost all surfaces surrounding the air, and continues to exhibit the internal pressure holding function. In this case, the thickness of the auxiliary layer can be made thinner than the thickness of the conventional butyl rubber inner liner of about 1 mm, and the weight can be sufficiently reduced. Preferably,
The thickness of the auxiliary layer is 50 to 500 μm. This is 50 μm
If it is less than the above, it is difficult to manufacture, and even if it can be manufactured, the effect of the gas barrier is small, and if it exceeds 500 μm, the effect of reducing the weight of the tire cannot be obtained.
【０００９】エチレン・ビニルアルコール共重合体中の
エチレンとビニルアルコールとのモル比は特に制限され
ず、目的に応じて適宜設定することができる。エチレン
を多くすることにより、よりタフなフィルムを得ること
ができ、ビニルアルコールを多くすることにより、フィ
ルムの空気不透過性を高めることができる。また、本発
明の空気不透過性層を構成するポリビニルアルコールま
たはエチレン・ビニルアルコール共重合体の架橋方法
は、特に制限されないが、作製したフィルムに直接作用
させ得る電子線照射法が好ましい。The molar ratio between ethylene and vinyl alcohol in the ethylene / vinyl alcohol copolymer is not particularly limited, and can be appropriately set according to the purpose. By increasing the amount of ethylene, a tougher film can be obtained, and by increasing the amount of vinyl alcohol, the air impermeability of the film can be increased. The method for crosslinking the polyvinyl alcohol or ethylene / vinyl alcohol copolymer constituting the air-impermeable layer of the present invention is not particularly limited, but an electron beam irradiation method capable of directly acting on the produced film is preferable.
【００１０】[0010]
【実施例】本発明を具体的に説明する。空気不透過性層
としてのインナーライナーを、ポリビニルアルコール
（表１：ＰＶＡ［（株）クラレ製、ビニロンフィルム、
商標ＶＦ−Ａ＃２０００］）、エチレン・ビニルアルコ
ール共重合体（表１：ＥＶＯＨ［（株）クラレ製、商標
ＥＦ−Ｆ、融点１８３℃］）、臭素化ブチルゴム（表
１：Ｂｒ−ＩＩＲ、配合は表２に記載）、６−ナイロン
（表１：ＰＡ６）を使用して、表１記載の厚さでそれぞ
れ形成し、実施例２および４にはさらに厚さ２００μｍ
の補助層（配合は表２に記載、空気透過係数2.0×１０
―９cm3 ・cm / cm2 ・sec・ cmHg）を設け、隣接部材
との間を接着剤（東洋化学研究所製、メタロックＲ３０
Ｍ）で接着して乗用車用タイヤ（１９５／６５Ｒ１５）
を試作した。なお、実施例で使用した空気不透過性層は
すべて電子線照射により架橋したものを使用し、その処
理条件は加速電圧３００ｋＶ、照射エネルギー２０Ｍｒ
ａｄであった。EXAMPLES The present invention will be specifically described. An inner liner as an air impermeable layer was formed of polyvinyl alcohol (Table 1: PVA [manufactured by Kuraray Co., Ltd., vinylon film,
Trademark VF-A # 2000]), ethylene / vinyl alcohol copolymer (Table 1: EVOH [Kuraray Co., Ltd., trademark EF-F, melting point: 183 ° C]), brominated butyl rubber (Table 1: Br-IIR, The formulations are shown in Table 2) and 6-nylon (Table 1: PA6) were used to form the thicknesses shown in Table 1, respectively.
Auxiliary layer (formulation is described in Table 2, air permeability coefficient 2.0 × 10
-9 cm 3 · cm / cm 2 · sec · cmHg) and provided, adhesive between the adjacent member (Toyo Kagaku Laboratory Ltd., Metaloc R30
M) for passenger car tires (195 / 65R15)
Was prototyped. The air-impermeable layers used in the examples were all crosslinked by electron beam irradiation, and the processing conditions were acceleration voltage of 300 kV and irradiation energy of 20 Mr.
was ad.
【００１１】各タイヤについて、空気圧１４０ｋＰａで
８０ｋｍ／ｈの速度に相当する回転数のドラム上に荷重
６ｋＮで押し付けて、１０，０００ｋｍ走行した後の内
圧保持性を比較例１の値を１００として指数表示し、そ
の結果を表１に示す。また、これら各タイヤのインナー
ライナー外観を目視観察して、亀裂、剥離の状態を調
べ、同じく表１に記載した。さらに、比較例１のタイヤ
（従来タイヤ）とタイヤ重量を比較し、何％軽量化され
たかをタイヤ軽量化率として表す。Each tire was pressed against a drum having a rotation speed of 80 km / h at an air pressure of 140 kPa with a load of 6 kN, and the internal pressure retention after running 10,000 km was indexed with the value of Comparative Example 1 as 100. And the results are shown in Table 1. The appearance of the inner liner of each of these tires was visually observed to check the state of cracking and peeling. Further, the tire of Comparative Example 1 (conventional tire) is compared with the tire weight, and the percent weight reduction is expressed as a tire weight reduction ratio.
【００１２】[0012]
【表１】 比較例３および比較例４は、架橋していないエチレン・
ビニルアルコール共重合体を使用した。タイヤ加硫後の
観察により、フィルムの剥がれおよび／または穴あきが
生じていたため、その後の測定を中止した。[Table 1] Comparative Examples 3 and 4 show that ethylene
A vinyl alcohol copolymer was used. Observation after vulcanization of the tire revealed that peeling and / or perforation of the film had occurred, so the subsequent measurement was stopped.
【００１３】[0013]
【表２】 [Table 2]
【００１４】補助層がなく、空気不透過性層が剥離しな
い場合、内圧保持性がやや低下するが、軽量効果は大き
い。補助層を加えることにより、内圧保持性を確保する
ことができ、かつ、タイヤ軽量化効果はまだ充分に得ら
れる。補助層が空気不透過性層に隣接し、かつ、接着し
ているものが望ましいと言える。When there is no auxiliary layer and the air-impermeable layer does not peel off, the internal pressure retention is slightly reduced, but the weight effect is large. By adding the auxiliary layer, the internal pressure retention can be ensured, and the effect of reducing the tire weight can still be sufficiently obtained. It may be desirable for the auxiliary layer to be adjacent to and adhered to the air impermeable layer.
【００１５】[0015]
【発明の効果】以上説明したように、本発明によると、
内圧を保持しつつ、タイヤの軽量化を図ることができ
る。As described above, according to the present invention,
It is possible to reduce the weight of the tire while maintaining the internal pressure.
Claims (5)
架橋されたエチレン・ビニルアルコール共重合体よりな
る空気不透過性層を具えてなることを特徴とする空気入
りタイヤ。1. A pneumatic tire comprising an air-impermeable layer made of cross-linked polyvinyl alcohol or cross-linked ethylene / vinyl alcohol copolymer.
であることを特徴とする請求項１記載の空気入りタイヤ2. The pneumatic tire according to claim 1, wherein the thickness of the air-impermeable layer is 30 μm or less.
係数1.0×10-9 cm3 ・cm/ cm2 ・sec・ cmHg以下のエラ
ストマーよりなる補助層をさらに具えることを特徴とす
る請求項１または２記載の空気入りタイヤ。3. An auxiliary layer made of an elastomer having an air permeability coefficient of 1.0 × 10 −9 cm 3 · cm / cm 2 · sec · cmHg or less is provided adjacent to the air impermeable layer. The pneumatic tire according to claim 1.
着されてなることを特徴とする請求項３に記載の空気入
りタイヤ。4. The pneumatic tire according to claim 3, wherein the air-impermeable layer is bonded to the auxiliary layer.
ことを特徴とする請求項３または４に記載の空気入りタ
イヤ。5. The pneumatic tire according to claim 3, wherein the thickness of the auxiliary layer is 50 to 500 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000271659A JP4450497B2 (en) | 2000-09-07 | 2000-09-07 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000271659A JP4450497B2 (en) | 2000-09-07 | 2000-09-07 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002079804A true JP2002079804A (en) | 2002-03-19 |
| JP4450497B2 JP4450497B2 (en) | 2010-04-14 |
Family
ID=18757910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000271659A Expired - Lifetime JP4450497B2 (en) | 2000-09-07 | 2000-09-07 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4450497B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004176048A (en) * | 2002-11-13 | 2004-06-24 | Bridgestone Corp | Inner liner for use in pneumatic tire, and pneumatic tire |
| JP2006213300A (en) * | 2005-02-07 | 2006-08-17 | Bridgestone Corp | Pneumatic tire |
| JP2007112000A (en) * | 2005-10-20 | 2007-05-10 | Bridgestone Corp | Method for manufacturing tire |
| WO2007083785A1 (en) * | 2006-01-17 | 2007-07-26 | The Yokohama Rubber Co., Ltd. | Low-permeable rubber laminate and pneumatic tire using same |
| WO2007100159A1 (en) * | 2006-03-03 | 2007-09-07 | The Yokohama Rubber Co., Ltd. | Low permeable rubber laminate and pneumatic tire using same |
| US7530380B2 (en) | 2002-10-08 | 2009-05-12 | Sumitomo Rubber Industries, Ltd. | Tubeless tire |
| US7600546B2 (en) | 2002-11-13 | 2009-10-13 | Bridgestone Corporation | Pneumatic tire comprising an innerliner |
| US7976666B2 (en) | 2005-09-30 | 2011-07-12 | The Yokohama Rubber Co., Ltd. | Poorly air-permeable rubber laminate composed of poorly air-permeable resin and rubber composition, and method for production thereof |
| WO2012008183A1 (en) * | 2010-07-15 | 2012-01-19 | 横浜ゴム株式会社 | Laminated body and pneumatic tyre using same |
-
2000
- 2000-09-07 JP JP2000271659A patent/JP4450497B2/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7530380B2 (en) | 2002-10-08 | 2009-05-12 | Sumitomo Rubber Industries, Ltd. | Tubeless tire |
| JP2004176048A (en) * | 2002-11-13 | 2004-06-24 | Bridgestone Corp | Inner liner for use in pneumatic tire, and pneumatic tire |
| US7600546B2 (en) | 2002-11-13 | 2009-10-13 | Bridgestone Corporation | Pneumatic tire comprising an innerliner |
| JP4589615B2 (en) * | 2002-11-13 | 2010-12-01 | 株式会社ブリヂストン | Inner liner for pneumatic tire and pneumatic tire |
| JP2006213300A (en) * | 2005-02-07 | 2006-08-17 | Bridgestone Corp | Pneumatic tire |
| US7976666B2 (en) | 2005-09-30 | 2011-07-12 | The Yokohama Rubber Co., Ltd. | Poorly air-permeable rubber laminate composed of poorly air-permeable resin and rubber composition, and method for production thereof |
| JP2007112000A (en) * | 2005-10-20 | 2007-05-10 | Bridgestone Corp | Method for manufacturing tire |
| EP1974907A4 (en) * | 2006-01-17 | 2012-04-04 | Yokohama Rubber Co Ltd | Low-permeable rubber laminate and pneumatic tire using same |
| WO2007083785A1 (en) * | 2006-01-17 | 2007-07-26 | The Yokohama Rubber Co., Ltd. | Low-permeable rubber laminate and pneumatic tire using same |
| EP1974907A1 (en) * | 2006-01-17 | 2008-10-01 | The Yokohama Rubber Co., Ltd. | Low-permeable rubber laminate and pneumatic tire using same |
| JPWO2007083785A1 (en) * | 2006-01-17 | 2009-06-11 | 横浜ゴム株式会社 | Low permeability rubber laminate and pneumatic tire using the same |
| US8056595B2 (en) | 2006-01-17 | 2011-11-15 | The Yokohama Rubber Co., Ltd. | Low-permeable rubber laminate and pneumatic tire using same |
| WO2007100159A1 (en) * | 2006-03-03 | 2007-09-07 | The Yokohama Rubber Co., Ltd. | Low permeable rubber laminate and pneumatic tire using same |
| US8609232B2 (en) | 2006-03-03 | 2013-12-17 | The Yokohama Rubber Co., Ltd. | Low permeability rubber laminate and pneumatic tire using the same |
| JP2012020509A (en) * | 2010-07-15 | 2012-02-02 | Yokohama Rubber Co Ltd:The | Laminate, and pneumatic tire using the same |
| WO2012008183A1 (en) * | 2010-07-15 | 2012-01-19 | 横浜ゴム株式会社 | Laminated body and pneumatic tyre using same |
| US9272491B2 (en) | 2010-07-15 | 2016-03-01 | The Yokohama Rubber Co., Ltd. | Laminated body and pneumatic tyre using same |
| US9969217B2 (en) | 2010-07-15 | 2018-05-15 | The Yokohama Rubber Co., Ltd. | Laminated body and pneumatic tyre using same |
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| JP4450497B2 (en) | 2010-04-14 |
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