JPH1035217A - Tire reinforcing laminated member and pneumatic tire appying it - Google Patents

Tire reinforcing laminated member and pneumatic tire appying it

Info

Publication number
JPH1035217A
JPH1035217A JP8215135A JP21513596A JPH1035217A JP H1035217 A JPH1035217 A JP H1035217A JP 8215135 A JP8215135 A JP 8215135A JP 21513596 A JP21513596 A JP 21513596A JP H1035217 A JPH1035217 A JP H1035217A
Authority
JP
Japan
Prior art keywords
rubber
tire
squeegee
compound
laminated member
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
Application number
JP8215135A
Other languages
Japanese (ja)
Other versions
JP3542057B2 (en
Inventor
Eiichiro Yamaguchi
英一郎 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP21513596A priority Critical patent/JP3542057B2/en
Publication of JPH1035217A publication Critical patent/JPH1035217A/en
Application granted granted Critical
Publication of JP3542057B2 publication Critical patent/JP3542057B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Tires In General (AREA)
  • Laminated Bodies (AREA)
  • Tyre Moulding (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve anti-fatigue property of rubber by laminating squeegee rubber on a cord layer formed by steel cord buried in coating rubber, holding an elastic rate between the squeegee rubber and the coating rubber within a specific relationship and composing a specific compound to the squeegee rubber. SOLUTION: In the tire reinforcing laminated member of a pneumatic tire, squeegee rubber 2 of a rubber compound A is pasted on a cord layer 1 in which steel cords 3 are buried in the coating rubber 4 of a rubber compound B, but rubber material capable of sulfur vulcanization is used for a rubber component in the rubber compound A of the squeegee rubber 2 and in the rubber compound B of a coating rubber 4. And in this case, the elasticity a of the rubber compound A and the elasticity b of the rubber compound B are so set as to satisfy a relationship b>=a, meanwhile the rubber compound A is made to include such a compound is displayed by a separately shown general equation so as to improve the fatigue resistance of the squeegee rubber 2. In the equation, R, R' stand for low grade alkyl group, n, m stand for integers 1 to 5.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、コーティングゴムにス
チールコードが埋設されてなるコード層上に、スキージ
ーゴムが積層されてなるタイヤ補強用積層部材およびそ
れを適用した空気入りタイヤに関し、詳しくは、スチー
ルコードとコーティングゴムとの間の初期接着性、耐熱
・耐湿接着性を損なうことなくゴム組成物の耐疲労性を
大幅に高め、空気入りタイヤの耐久性を大幅に向上させ
ることのできるタイヤ補強用積層部材およびそれを適用
した空気入りタイヤに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire reinforcing laminated member in which a squeegee rubber is laminated on a cord layer in which a steel cord is embedded in a coating rubber, and a pneumatic tire using the same. A tire that can significantly increase the fatigue resistance of a rubber composition without impairing the initial adhesiveness between a steel cord and a coating rubber, heat and moisture resistance, and greatly improve the durability of a pneumatic tire. The present invention relates to a reinforcing laminated member and a pneumatic tire to which the laminated member is applied.

【0002】[0002]

【従来の技術】空気入りタイヤは、その補強部材とし
て、コーティングゴムにスチールコードが埋設されてな
るコード層がカーカスプライ、ベルトまたはブレーカー
に適用されている。また、プライ間にスキージーゴムを
積層することにより、コード層の疲労耐久性を高めて空
気入りタイヤの耐久性を向上させることもよくなされて
いる。
2. Description of the Related Art In a pneumatic tire, as a reinforcing member, a cord layer in which a steel cord is embedded in a coating rubber is applied to a carcass ply, a belt or a breaker. Also, it has been often practiced to improve the durability of a pneumatic tire by increasing the fatigue durability of a cord layer by laminating squeegee rubber between plies.

【0003】かかるタイヤ補強用積層部材で補強された
空気入りタイヤにおいては、以下の2点について高い水
準で両立させることが要求される。その一つは、走行に
より発生する熱または歪み、場合によって高湿度下の熱
に対するコードコーティングゴムの耐久性である。もう
一つは、コードとコーティングゴムとの間の接着耐久性
を確保することである。また、製造工程の合理化、省エ
ネルギーの面から、短時間加硫でのコードとコーティン
グゴムとの間の接着性(以下「初期接着性」と称する)
の向上である。
[0003] In a pneumatic tire reinforced with such a tire reinforcing laminated member, it is required to satisfy both of the following two points at a high level. One is the durability of the cord-coated rubber to heat or strain generated by running, and in some cases, heat under high humidity. Another is to ensure the adhesive durability between the cord and the coating rubber. In addition, from the viewpoint of streamlining the manufacturing process and saving energy, the adhesiveness between the cord and the coating rubber in a short time vulcanization (hereinafter referred to as "initial adhesiveness").
It is an improvement.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上述の
二つの要求特性を高い水準で両立させることは未だなさ
れていないのが現状である。例えば、コバルト化合物を
スチールコードとゴムとの接着促進剤として用いたゴム
組成物では、確かに優れた初期接着性は得られるもの
の、該ゴム組成物の耐久性がコバルト化合物未添加のも
のに比し著しく劣ることになる。
However, at present, it has not yet been achieved to satisfy the above two required characteristics at a high level. For example, in a rubber composition using a cobalt compound as an adhesion promoter between a steel cord and rubber, although excellent initial adhesion is obtained, the durability of the rubber composition is higher than that of a rubber composition without a cobalt compound added. And will be significantly inferior.

【0005】そこで、本発明の目的は、スチールコード
とコーティングゴムとの間の初期接着性、耐熱・耐湿接
着性を損なうことなくゴムの耐疲労性の改善されたタイ
ヤ補強用積層部材およびそれを適用することにより耐久
性の大幅に向上した空気入りタイヤを提供することにあ
る。
Accordingly, an object of the present invention is to provide a laminated member for tire reinforcement in which the fatigue resistance of a rubber is improved without impairing the initial adhesion between a steel cord and a coating rubber, and the heat and moisture resistance without impairing the adhesion. It is an object of the present invention to provide a pneumatic tire having significantly improved durability by applying the same.

【0006】[0006]

【課題を解決するための手段】本発明者は、上記課題を
解決すべく鋭意検討した結果、コーティングゴムにスチ
ールコードが埋設されてなるコード層上にスキージーゴ
ムを積層し、該スキージーゴムとコーティングゴムとの
弾性率を所定の関係に維持し、かつスキージーゴムに特
定の化合物を配合することにより上記課題を解決し得る
ことを見出し、本発明を完成するに至った。
Means for Solving the Problems The present inventor has made intensive studies to solve the above-mentioned problems, and as a result, laminated squeegee rubber on a cord layer in which a steel cord is embedded in coating rubber, and coated the squeegee rubber with the coating. The present inventors have found that the above problem can be solved by maintaining the elastic modulus of the rubber in a predetermined relationship and blending a specific compound into the squeegee rubber, and have completed the present invention.

【0007】すなわち、本発明は夫々下記の通りであ
る。 (1)コーティングゴムにスチールコードが埋設されて
なるコード層上に、スキージーゴムが積層されてなるタ
イヤ補強用積層部材において、前記スキージーゴムのゴ
ム組成物(A)および前記コーティングゴムのゴム組成
物(B)におけるゴム成分が硫黄加硫可能なゴムからな
り、前記ゴム組成物(A)の弾性率aと前記ゴム組成物
(B)の弾性率bとが次式、 b≧a の関係を満足し、前記ゴム組成物(A)がゴム成分10
0重量部に対し0.1〜1.2重量部の次の一般式
(I)、 (式中のRおよびR’は夫々低級アルキル基、nおよび
mは夫々1〜5の整数を示す)で表される化合物を含有
することを特徴とするタイヤ補強用積層部材である。
That is, the present invention is as follows. (1) A tire reinforcing laminated member in which a squeegee rubber is laminated on a cord layer in which a steel cord is embedded in a coating rubber, wherein the rubber composition (A) of the squeegee rubber and the rubber composition of the coating rubber The rubber component in (B) is made of a sulfur-vulcanizable rubber, and the elastic modulus a of the rubber composition (A) and the elastic modulus b of the rubber composition (B) are represented by the following formula: b ≧ a Satisfied, the rubber composition (A) has a rubber component 10
0.1 to 1.2 parts by weight of the following general formula (I) based on 0 parts by weight, (Wherein R and R 'in the formula each represent a lower alkyl group, and n and m each represent an integer of 1 to 5).

【0008】(2)前記(1)のタイヤ補強用積層部材
において、前記ゴム組成物(A)および前記ゴム組成物
(B)がゴム成分100重量部に対し1〜10重量部の
硫黄を含有するタイヤ補強用積層部材である。
(2) In the laminated member for reinforcing a tire of (1), the rubber composition (A) and the rubber composition (B) contain 1 to 10 parts by weight of sulfur with respect to 100 parts by weight of the rubber component. It is a laminated member for tire reinforcement.

【0009】(3)前記(1)または(2)のタイヤ補
強用積層部材が空気入りラジアルタイヤの1層以上のラ
ジアルカーカスプライとして全てにまたは一部に適用さ
れてなることを特徴とする空気入りラジアルタイヤであ
る。
(3) The air wherein the laminated member for reinforcing the tire according to (1) or (2) is applied to all or a part of a radial carcass ply of at least one layer of a pneumatic radial tire. It is a radial tire containing.

【0010】(4)前記(1)または(2)のタイヤ補
強用積層部材が空気入りラジアルタイヤの1層以上のベ
ルトとして全てにまたは一部に適用されてなることを特
徴とする空気入りラジアルタイヤである。
(4) The pneumatic radial, wherein the tire reinforcing laminated member according to (1) or (2) is applied to all or a part of one or more belts of a pneumatic radial tire. Tires.

【0011】(5)前記(1)または(2)のタイヤ補
強用積層部材が空気入りバイアスタイヤの1層以上のブ
レーカーとして全てにまたは一部に適用されてなること
を特徴とする空気入りバイアスタイヤである。
(5) The pneumatic bias characterized in that the tire reinforcing laminated member according to (1) or (2) is applied to all or a part as a breaker having one or more layers of a pneumatic bias tire. Tires.

【0012】[0012]

【発明の実施の形態】本発明のタイヤ補強用積層部材
は、図1に示すように、ゴム組成物(B)のコーティン
グゴム4にスチールコード3が埋設されてなるコード層
1上に、ゴム組成物(A)のスキージーゴム2が貼り付
けられてなる。
BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a laminated member for reinforcing a tire according to the present invention has a rubber layer on a cord layer 1 in which a steel cord 3 is embedded in a coating rubber 4 of a rubber composition (B). The squeegee rubber 2 of the composition (A) is attached.

【0013】かかるスキージーゴム2の厚さは、タイヤ
の適用箇所に応じ適宜選定し得るものであり、特に制限
されるべきものではないが、好ましくは0.1〜10m
mである。
The thickness of the squeegee rubber 2 can be appropriately selected according to the application location of the tire, and is not particularly limited, but is preferably 0.1 to 10 m.
m.

【0014】また、コード層1におけるスチールコード
3上のコーティングゴム4の厚さhも、タイヤの適用箇
所、使用するコード種によって必要な値が異なり、特に
制限されるべきものではない。
Also, the thickness h of the coating rubber 4 on the steel cord 3 in the cord layer 1 has a required value which differs depending on the application location of the tire and the kind of cord used, and is not particularly limited.

【0015】本発明において、前記スキージーゴムのゴ
ム組成物(A)および前記コーティングゴムのゴム組成
物(B)におけるゴム成分は硫黄加硫可能なゴム材から
なり、中でも天然ゴム、ポリイソプレンゴム、ポリブタ
ジエンゴム、スチレンブタジエン共重合体ゴムまたはこ
れらの混合物が凡用性が高く、好適である。
In the present invention, the rubber components in the rubber composition (A) of the squeegee rubber and the rubber composition (B) of the coating rubber are made of a sulfur-vulcanizable rubber material, and include natural rubber, polyisoprene rubber, Polybutadiene rubber, styrene-butadiene copolymer rubber, or a mixture thereof is preferred because of its high general applicability.

【0016】また、本発明においては、前記ゴム組成物
(A)の弾性率aと前記ゴム組成物(B)の弾性率bと
が次式、 b≧a の関係を満足することを要する。これは以下の理由によ
る。有機酸コバルト塩等を用いることにより従来におい
て問題となっていたコーティングゴムの耐久性は、前記
ゴム組成物(A)、(B)の弾性率a、bが前記式の関
係を満たすようにすることにより、コーティングゴムの
歪みが分散し、従来構造に比べコーティングゴムへの入
力が弱められ、向上する。これにより、コーティングゴ
ムのゴム組成物(B)に有機酸コバルト塩等を用いてス
チールコード−コーティングゴム間の初期接着性を従来
と同等に維持することができ、また接着耐久性も従来と
同等に維持することができる。
In the present invention, the elastic modulus a of the rubber composition (A) and the elastic modulus b of the rubber composition (B) need to satisfy the following relationship: b ≧ a. This is for the following reason. The durability of the coating rubber, which has been a problem in the past by using an organic acid cobalt salt or the like, is set so that the elastic modulus a, b of the rubber composition (A) or (B) satisfies the relationship of the above formula. Thereby, the distortion of the coating rubber is dispersed, and the input to the coating rubber is weakened and improved as compared with the conventional structure. As a result, the initial adhesion between the steel cord and the coating rubber can be maintained at the same level as before by using the organic acid cobalt salt or the like for the rubber composition (B) of the coating rubber, and the bonding durability is also the same as before. Can be maintained.

【0017】さらに、本発明においては、前記ゴム組成
物(A)が次の一般式(I)、 で表される化合物を含有し、かつコバルト金属塩を含有
しないことで、コーティングゴムに比しスキージーゴム
の疲労耐久性を大幅に向上させることができる。これに
よりゴム組成物(B)のコーティングゴムへの疲労入力
が更に減少し、結果としてタイヤの耐久性が向上する。
その配合量は、かかる疲労耐久性に対する効果および作
業性等の観点からゴム成分100重量部に対し0.1〜
1.2重量部、好ましくは0.3〜0.7重量部とす
る。前記化合物(I)のうち、特に好ましくはN,N´
−m−キシレン−ビス−シトラコン酸イミドである。な
お、本発明においては、前記ゴム組成物(B)について
も、前記ゴム組成物(A)との弾性率との関係を前記式
の関係に保てる範囲内で前記化合物(I)を配合するこ
とができる。
Further, in the present invention, the rubber composition (A) has the following general formula (I): By containing the compound represented by the formula (1) and not containing the cobalt metal salt, the fatigue durability of the squeegee rubber can be greatly improved as compared with the coating rubber. Thereby, the fatigue input of the rubber composition (B) to the coating rubber is further reduced, and as a result, the durability of the tire is improved.
The compounding amount is from 0.1 to 100 parts by weight of the rubber component from the viewpoint of the effect on the fatigue durability and workability.
1.2 parts by weight, preferably 0.3 to 0.7 parts by weight. Of the compounds (I), N, N 'is particularly preferred.
-M-xylene-bis-citraconic imide. In the present invention, the compound (I) is also compounded in the rubber composition (B) as long as the relation with the rubber composition (A) and the elastic modulus can be maintained in the relation of the above formula. Can be.

【0018】さらにまた、本発明においては、前記ゴム
組成物(A)および前記ゴム組成物(B)がゴム成分1
00重量部に対し1〜10重量部の硫黄を含有すること
が好ましい。この理由は、1重量部未満では、製品とし
て必要とされる弾性率が得られない。同時に、スチール
コードとの接着耐久性において不充分となる。一方、1
0重量部を超えると、ゴムの耐熱老化性が著しく低下
し、好ましくない。
Further, in the present invention, the rubber composition (A) and the rubber composition (B) may be a rubber component 1
It is preferable to contain 1 to 10 parts by weight of sulfur with respect to 00 parts by weight. The reason is that if the amount is less than 1 part by weight, the elastic modulus required as a product cannot be obtained. At the same time, the bonding durability with the steel cord becomes insufficient. Meanwhile, 1
If the amount exceeds 0 parts by weight, the heat aging resistance of the rubber is remarkably reduced, which is not preferable.

【0019】なお、本発明においては、前記ゴム組成物
(A)、(B)には、前記化合物の他に、必要に応じて
各種配合剤を配合することができ、かかる配合剤として
は、カーボンブラック、シリカ、炭酸カルシウム等の補
強剤や充填剤、アロマオイル等の軟化剤等、通常のゴム
工業で使用される配合剤を適宜必要に応じて通常の配合
量の範囲内で配合することができる。
In the present invention, the rubber compositions (A) and (B) can contain various compounding agents, if necessary, in addition to the compounds described above. Compounding agents used in the ordinary rubber industry, such as reinforcing agents and fillers such as carbon black, silica, and calcium carbonate, and softening agents such as aroma oils, are appropriately compounded within the usual compounding amount as required. Can be.

【0020】次に、本発明の空気入りラジアルタイヤに
おいては、前記タイヤ補強用積層部材が1層以上(通常
は1層)のラジアルカーカスプライとして全てにまたは
一部に適用されてなる。一部に適用する場合には、歪み
が発生し得る領域に、前記タイヤ補強用積層部材を1層
以上適用するとよい。
Next, in the pneumatic radial tire of the present invention, the tire reinforcing laminated member is applied to all or a part of a radial carcass ply of one or more layers (normally, one layer). When applied to a part, it is preferable to apply one or more layers of the tire reinforcing laminated member to a region where distortion can occur.

【0021】また、本発明の空気入りラジアルタイヤに
おいては、前記タイヤ補強用積層部材が1層以上のベル
トとして全てにまたは一部に適用されてなる。一部に適
用する場合には、上述のカーカスプライの場合と同様に
歪み域において適用する。
[0021] In the pneumatic radial tire of the present invention, the tire reinforcing laminated member is applied to all or a part of one or more belts. When it is applied to a part, it is applied in a distortion region as in the case of the carcass ply described above.

【0022】さらに、本発明の空気入りバイアスタイヤ
においても、前記タイヤ補強用積層部材が1層以上のブ
レーカーとして全てにまたは一部に適用されてなり、こ
の場合も一部に適用する場合には、上述のラジアルタイ
ヤの場合と同様に歪み域において適用する。
Further, also in the pneumatic bias tire of the present invention, the tire reinforcing laminated member is applied to all or a part as a breaker having one or more layers. As in the case of the radial tire described above, the present invention is applied in a strain region.

【0023】[0023]

【実施例】次に本発明を実施例および比較例により、具
体的に説明する。実施例1〜3,比較例1〜4 天然ゴム100重量部、HAFカーボンブラック50重
量部、N−(1,3−ジメチルブチル)−N’−フェニ
ル−p−フェニレンジアミン1重量部、亜鉛華8重量
部、N−オキシジエチレン−2−ベンゾチアゾールスル
フェンアミド1.0重量部および硫黄5重量部の配合内
容に、更に下記の表1に示す化合物や有機酸コバルト塩
を配合し、前記ゴム組成物(A)および(B)用の各種
ゴム組成物を調製した。
Next, the present invention will be described specifically with reference to examples and comparative examples. Examples 1 to 3 and Comparative Examples 1 to 4 100 parts by weight of natural rubber, 50 parts by weight of HAF carbon black, 1 part by weight of N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine, zinc white 8 parts by weight, 1.0 part by weight of N-oxydiethylene-2-benzothiazolesulfenamide and 5 parts by weight of sulfur were further blended with the compounds and organic acid cobalt salts shown in Table 1 below, Various rubber compositions for compositions (A) and (B) were prepared.

【0024】[0024]

【表1】 1)N,N’−m−キシレン−ビス−シトラコン酸イミ
ド(本発明に係る化合物) 2)N,N’−m−フェニレン−ビス−シトラコン酸イ
ミド(比較化合物) 3)JIS K6301引張試験法に準じて、ダンベル
状サンプルの引張試験を行ない、100%伸長時の弾性
率をゴム組成物イを100として指数表示した。
[Table 1] 1) N, N'-m-xylene-bis-citraconic imide (compound according to the present invention) 2) N, N'-m-phenylene-bis-citraconic imide (comparative compound) 3) JIS K6301 tensile test method A dumbbell-shaped sample was subjected to a tensile test according to the above, and the elastic modulus at 100% elongation was expressed as an index, with the rubber composition a being 100.

【0025】得られたゴム組成物をゴム組成物(B)用
のコーティングゴムとして、表面に真鍮めっきが施され
たスチールコードを埋設してコード層とし、その上に、
同じく得られたゴム組成物をゴム組成物(A)用のスキ
ージーゴムとして貼り付け図1に示すように成型して1
45℃×30分間の加硫後、下記に示す各評価を行っ
た。ここで、スキージーゴムの厚さは2mm、また図1
に示すところの、コード層1におけるスチールコード3
上のコーティングゴム4の厚さhは0.2mmとした。
The obtained rubber composition is used as a coating rubber for the rubber composition (B), a steel cord having a surface coated with brass is embedded to form a cord layer, and a cord layer is formed thereon.
The obtained rubber composition was affixed as a squeegee rubber for the rubber composition (A) and molded as shown in FIG.
After vulcanization at 45 ° C. × 30 minutes, each evaluation shown below was performed. Here, the thickness of the squeegee rubber is 2 mm, and FIG.
The steel cord 3 in the code layer 1 as shown in
The thickness h of the upper coating rubber 4 was 0.2 mm.

【0026】(初期接着性)前記作製サンプルをJIS
K6301の剥離試験法に準じてスチールコードと埋
設ゴム層間の剥離試験を行い、コード上に残存したゴム
付着量により初期接着性を評価した。コードが完全にゴ
ムによって被覆されている状態を100、全くゴムが付
着していない状態を0として表示した。
(Initial adhesion)
A peel test between the steel cord and the buried rubber layer was performed according to the peel test method of K6301, and the initial adhesiveness was evaluated based on the amount of rubber remaining on the cord. The state in which the cord was completely covered with rubber was designated as 100, and the state in which no rubber was attached was designated as 0.

【0027】(耐熱接着性)初期接着試験に用いたもの
と同様の試験サンプルを100℃の恒温槽中に7日間放
置した後、初期接着性と同様に接着性を評価した。
(Heat Resistance Adhesion) A test sample similar to that used in the initial adhesion test was left in a thermostat at 100 ° C. for 7 days, and then the adhesion was evaluated in the same manner as the initial adhesion.

【0028】(耐久性)前記試作ゴム補強用積層部材を
打込数6本/1インチ幅のラジアルカーカスプライ(1
層)に適用してサイズ1800R33の空気入りラジア
ルタイヤを製造し、かかるラジアルタイヤを用いて高負
荷重時の耐久試験を行った。かかる試験は、内圧7kg
f/cm、一定速度25kg/hの直進ドラム試験に
おいて、24時間毎に負荷荷重をステップアップしてい
くことにより耐久性を評価した。結果は、タイヤが故障
するまでの時間を指数で表し、従来構造のタイヤ(比較
例1)を100とした。数値が大なる程結果が良好であ
る。得れらた結果を下記の表2に示す。
(Durability) A radial carcass ply (1
A pneumatic radial tire having a size of 1800R33 was manufactured by applying the tire to the above layer, and a durability test under heavy load was performed using the radial tire. The test is performed with an internal pressure of 7 kg.
In a straight drum test at f / cm 2 and a constant speed of 25 kg / h, the durability was evaluated by stepping up the applied load every 24 hours. The result is expressed as an index indicating the time until the tire breaks down, and the tire having the conventional structure (Comparative Example 1) was set to 100. The higher the value, the better the result. The results obtained are shown in Table 2 below.

【0029】[0029]

【表2】 [Table 2]

【0030】実施例4〜6,比較例5〜8 前記試作ゴム補強用積層部材を打込数10.5本/1イ
ンチ幅の全ベルトに適用してサイズ1800R33の空
気入りラジアルタイヤを製造し、かかるラジアルタイヤ
を用いて前記と同様の耐久試験を行った。この場合、ス
チールコードをコーティングゴム組成物(B)に埋設さ
れてなるコード層にゴム組成物(A)からなるスキージ
ーゴムを積層してなる基本積層部材をゴム組成物(A)
とゴム組成物(B)とが互いに隣接する関係で複数積層
してベルトが形成されている。結果は、タイヤが故障す
るまでの時間を指数で表し、従来構造のタイヤ(比較例
5)を100とした。数値が大なる程結果が良好であ
る。得れらた結果を下記の表3に示す。
Examples 4 to 6 and Comparative Examples 5 to 8 The pneumatic radial tire having a size of 1800R33 was manufactured by applying the prototype rubber-reinforcing laminated member to all belts having a driving number of 10.5 pieces / 1 inch width. A durability test similar to the above was performed using the radial tire. In this case, a basic laminated member obtained by laminating a squeegee rubber made of the rubber composition (A) on a cord layer in which a steel cord is embedded in the coating rubber composition (B) is used as a rubber composition (A).
And a plurality of rubber compositions (B) adjacent to each other to form a belt. The results represent the time until the tire breaks down as an index, and the tire of the conventional structure (Comparative Example 5) was set to 100. The higher the value, the better the result. The results obtained are shown in Table 3 below.

【0031】[0031]

【表3】 [Table 3]

【0032】[0032]

【発明の効果】以上説明してきたように本発明のタイヤ
補強用積層部材においては、コーティングゴムにスチー
ルコードが埋設されてなるコード層上にスキージーゴム
を積層し、該スキージーゴムとコーティングゴムとの弾
性率を所定の関係に維持し、かつ少なくともスキージー
ゴムに特定の化合物を配合したことにより、スチールコ
ードとコーティングゴムとの間の初期接着性、耐熱・耐
湿接着性を損なうことなくコーティングゴムの耐疲労性
を改善することができる。従って、かかるタイヤ補強用
積層部材を空気入りタイヤのラジアルカーカスプライ、
ベルトまたはブレーカーに適用することにより大幅にタ
イヤの耐久性を向上させることができる。
As described above, in the laminated member for reinforcing a tire according to the present invention, squeegee rubber is laminated on a cord layer in which a steel cord is embedded in coating rubber, and the squeegee rubber is coated with the coating rubber. By maintaining the elastic modulus in a predetermined relationship and at least compounding a specific compound into the squeegee rubber, the initial adhesion between the steel cord and the coating rubber, the heat resistance and the moisture resistance of the coating rubber are not impaired. Fatigue can be improved. Therefore, such a tire reinforcing laminated member is used as a pneumatic tire radial carcass ply,
By applying to a belt or a breaker, the durability of the tire can be greatly improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のタイヤ補強用積層部材の部分断面図で
ある。
FIG. 1 is a partial sectional view of a tire reinforcing laminated member of the present invention.

【符号の説明】[Explanation of symbols]

1 コード層 2 スキージーゴム 3 スチールコード 4 コーティングゴム 1 cord layer 2 squeegee rubber 3 steel cord 4 coating rubber

フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 C08K 5/16 KDF C08K 5/16 KDF C08L 21/00 LAY C08L 21/00 LAY Continuation of the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location C08K 5/16 KDF C08K 5/16 KDF C08L 21/00 LAY C08L 21/00 LAY

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 コーティングゴムにスチールコードが埋
設されてなるコード層上に、スキージーゴムが積層され
てなるタイヤ補強用積層部材において、 前記スキージーゴムのゴム組成物(A)および前記コー
ティングゴムのゴム組成物(B)におけるゴム成分が硫
黄加硫可能なゴムからなり、 前記ゴム組成物(A)の弾性率aと前記ゴム組成物
(B)の弾性率bとが次式、 b≧a の関係を満足し、 前記ゴム組成物(A)がゴム成分100重量部に対し
0.1〜1.2重量部の次の一般式(I)、 (式中のRおよびR’は夫々低級アルキル基、nおよび
mは夫々1〜5の整数を示す)で表される化合物を含有
することを特徴とするタイヤ補強用積層部材。
1. A tire reinforcing laminated member in which a squeegee rubber is laminated on a cord layer in which a steel cord is embedded in a coating rubber, wherein the rubber composition (A) of the squeegee rubber and the rubber of the coating rubber are provided. The rubber component in the composition (B) is a sulfur-vulcanizable rubber, and the elastic modulus a of the rubber composition (A) and the elastic modulus b of the rubber composition (B) are represented by the following formula: b ≧ a The rubber composition (A) satisfies the following general formula (I): 0.1 to 1.2 parts by weight based on 100 parts by weight of the rubber component. (Wherein R and R ′ in the formula each represent a lower alkyl group, and n and m each represent an integer of 1 to 5).
【請求項2】 前記ゴム組成物(A)および前記ゴム組
成物(B)がゴム成分100重量部に対し1〜10重量
部の硫黄を含有する請求項1記載のタイヤ補強用積層部
材。
2. The laminated member for reinforcing a tire according to claim 1, wherein the rubber composition (A) and the rubber composition (B) contain 1 to 10 parts by weight of sulfur based on 100 parts by weight of a rubber component.
【請求項3】 請求項1または2記載のタイヤ補強用積
層部材が空気入りラジアルタイヤの1層以上のラジアル
カーカスプライとして全てにまたは一部に適用されてな
ることを特徴とする空気入りラジアルタイヤ。
3. A pneumatic radial tire, wherein the tire reinforcing laminated member according to claim 1 or 2 is entirely or partially applied as one or more layers of a radial carcass ply of a pneumatic radial tire. .
【請求項4】 請求項1または2記載のタイヤ補強用積
層部材が空気入りラジアルタイヤの1層以上のベルトと
して全てにまたは一部に適用されてなることを特徴とす
る空気入りラジアルタイヤ。
4. A pneumatic radial tire, wherein the tire reinforcing laminated member according to claim 1 or 2 is applied to all or a part of one or more belts of a pneumatic radial tire.
【請求項5】 請求項1または2記載のタイヤ補強用積
層部材が空気入りバイアスタイヤの1層以上のブレーカ
ーとして全てにまたは一部に適用されてなることを特徴
とする空気入りバイアスタイヤ。
5. A pneumatic bias tire, wherein the tire reinforcing laminated member according to claim 1 or 2 is applied to all or a part of a pneumatic bias tire as a breaker having one or more layers.
JP21513596A 1996-07-26 1996-07-26 Laminated member for tire reinforcement and pneumatic tire using the same Expired - Fee Related JP3542057B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21513596A JP3542057B2 (en) 1996-07-26 1996-07-26 Laminated member for tire reinforcement and pneumatic tire using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21513596A JP3542057B2 (en) 1996-07-26 1996-07-26 Laminated member for tire reinforcement and pneumatic tire using the same

Publications (2)

Publication Number Publication Date
JPH1035217A true JPH1035217A (en) 1998-02-10
JP3542057B2 JP3542057B2 (en) 2004-07-14

Family

ID=16667290

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3542057B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327158A (en) * 2001-05-01 2002-11-15 Toyo Tire & Rubber Co Ltd Rubber composition for adhesion and pneumatic tire
JP2006152156A (en) * 2004-11-30 2006-06-15 Bridgestone Corp Pneumatic tire
JP2008188835A (en) * 2007-02-02 2008-08-21 Bridgestone Corp Rubber member
JP2010275518A (en) * 2009-04-30 2010-12-09 Bridgestone Corp Pneumatic tire
EP2425991A1 (en) * 2010-09-01 2012-03-07 Continental Reifen Deutschland GmbH Pneumatic tyres for a vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327158A (en) * 2001-05-01 2002-11-15 Toyo Tire & Rubber Co Ltd Rubber composition for adhesion and pneumatic tire
JP2006152156A (en) * 2004-11-30 2006-06-15 Bridgestone Corp Pneumatic tire
JP4617853B2 (en) * 2004-11-30 2011-01-26 株式会社ブリヂストン Pneumatic tire
JP2008188835A (en) * 2007-02-02 2008-08-21 Bridgestone Corp Rubber member
JP2010275518A (en) * 2009-04-30 2010-12-09 Bridgestone Corp Pneumatic tire
EP2425991A1 (en) * 2010-09-01 2012-03-07 Continental Reifen Deutschland GmbH Pneumatic tyres for a vehicle

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