JP2002019418A - Pneumatic tire for heavy load - Google Patents
Pneumatic tire for heavy loadInfo
- Publication number
- JP2002019418A JP2002019418A JP2000213408A JP2000213408A JP2002019418A JP 2002019418 A JP2002019418 A JP 2002019418A JP 2000213408 A JP2000213408 A JP 2000213408A JP 2000213408 A JP2000213408 A JP 2000213408A JP 2002019418 A JP2002019418 A JP 2002019418A
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- Prior art keywords
- layer
- cap
- tan
- tread
- rubber
- 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.)
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Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は重荷重用空気入りタ
イヤに関し、更に詳しくは、トレッド部が３層構造の耐
摩耗性及び発熱耐久性の改良された重荷重用空気入りタ
イヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy-duty pneumatic tire, and more particularly, to a heavy-duty pneumatic tire having a three-layer tread structure and improved wear resistance and heat generation durability.
【０００２】[0002]
【従来の技術】重荷重用タイヤにおいては、近年耐摩耗
性向上を目的として、天然ゴム（ＮＲ）単独またはポリ
ブタジエンゴム（ＢＲ）／スチレン−ブタジエン共重合
体ゴム（ＳＢＲ）に超微粒子系カーボンブラックを配合
したキャップがトレッド部に多用されている。しかしな
がら、耐摩耗性と耐久性の両立や氷上性能と耐摩耗性の
両立など二律背反する性能を両立させることは１層のト
レッド部では難しいため、２層構造又は３層構造のトレ
ッド部を用いることが提案され、そのための配合及び構
造に関して多くの特許出願が提出されている。しかしな
がら、２層構造のトレッドではその性能をさらに向上さ
せようとすると、成形時の作業性が悪化したり、ベルト
部との接着性が悪化したりするという問題が生じるおそ
れがある。2. Description of the Related Art In recent years, in heavy duty tires, ultrafine carbon black has been added to natural rubber (NR) alone or polybutadiene rubber (BR) / styrene-butadiene copolymer rubber (SBR) for the purpose of improving abrasion resistance. The blended cap is frequently used in the tread. However, it is difficult to achieve both opposing performances such as compatibility between abrasion resistance and durability, and compatibility between on-ice performance and abrasion resistance with a single-layer tread, so use a two-layer or three-layer tread. And many patent applications have been filed for formulations and structures therefor. However, in the tread having the two-layer structure, if the performance is further improved, there is a possibility that the workability at the time of molding is deteriorated and the adhesiveness to the belt portion is deteriorated.
【０００３】特開平１１−６０８１０号公報には３層構
造のトレッド部を用いて耐摩耗性、発熱耐久性及び耐ワ
ンダリング性を改良した重荷重用タイヤが記載されてい
る。また特開平６−８７０８号公報には、３層構造のト
レッド部の内側の層ほど発泡率を大きくしたゴム層を用
いて摩耗の中期以降の氷上性能を改良したスタッドレス
タイヤが記載されている。[0003] Japanese Patent Application Laid-Open No. 11-60810 discloses a heavy duty tire having improved wear resistance, heat generation durability and wandering resistance by using a three-layer tread portion. Japanese Patent Application Laid-Open No. 6-8708 describes a studless tire in which the on-ice performance after the middle stage of wear is improved by using a rubber layer having a higher foaming ratio as the inner layer of the tread portion having a three-layer structure.
【０００４】[0004]
【発明が解決しようとする課題】従って、本発明の目的
は前記した従来技術の現状に鑑み、耐摩耗性及び発熱耐
久性の両性能を改良した重荷重用空気入りタイヤを提供
することにある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a heavy-duty pneumatic tire having improved abrasion resistance and heat generation durability in view of the above-mentioned state of the art.
【０００５】[0005]
【課題を解決するための手段】本発明に従えば、トレッ
ド部がタイヤ表面からキャップ−Ａ，キャップ−Ｂ及び
ベース−Ｃの３層構造から成り、かつキャップ−Ａ層に
溝底が位置するトレッド部を有する重荷重用空気入りタ
イヤにおいて、ショルダー部及びクラウンセンター部で
のＡ層／Ｂ層／Ｃ層のゲージ比が３５〜８０／６０〜２
０／２〜２０（合計１００％とする）で、キャップ−Ａ
層が天然ゴム／ポリブタジエンゴム／スチレンブタジエ
ン共重合体ゴム＝１００〜５０／０〜４０／０〜４０
（重量％比）（合計１００％とする）から構成され、キ
ャップ−Ｂ層およびベース−Ｃ層が独立に天然ゴムおよ
び／またはポリイソプレンゴムから構成され、そしてキ
ャップ−Ａ層及びキャップ−Ｂ層の１００℃におけるｔ
ａｎδ（Ａ）及びｔａｎδ（Ｂ）が以下の関係： ｔａｎδ（Ａ）＞ｔａｎδ（Ｂ） … （Ｉ） ｔａｎδ（Ｂ）≦０．６ｔａｎδ（Ａ） … （II） を満足する重荷重用空気入りタイヤが提供される。According to the present invention, the tread portion has a three-layer structure of cap-A, cap-B and base-C from the tire surface, and the groove bottom is located in the cap-A layer. In a heavy-duty pneumatic tire having a tread portion, the gauge ratio of the A layer / B layer / C layer at the shoulder portion and the crown center portion is 35 to 80/60 to 2
0/2 to 20 (total 100%), Cap-A
The layer is made of natural rubber / polybutadiene rubber / styrene butadiene copolymer rubber = 100-50 / 0-40 / 0-40
(% By weight) (total of 100%), the cap-B layer and the base-C layer are independently composed of natural rubber and / or polyisoprene rubber, and the cap-A layer and the cap-B layer T at 100 ° C
The relationship between an δ (A) and tan δ (B) is as follows: tan δ (A)> tan δ (B) (I) tan δ (B) ≦ 0.6 tan δ (A) (II) Is provided.
【０００６】[0006]
【発明の実施の形態】本発明者らは、前記目的を解決す
べく、研究をすすめた結果、３層構造のトレッド部を採
用し、第１層に耐摩耗性の改良を指向したコンパウンド
を、第２層にチッピング性の改良を配慮した低発熱性の
コンパウンドを、第３層に高粘着性のコンパウンドを、
それぞれ、配置することにより、耐摩耗性を向上させな
がら、発熱耐久性を向上させた重荷重用空気入りタイヤ
を得ることに成功し、本発明をするに至った。以下、更
に詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have conducted researches to solve the above-mentioned object, and as a result, have adopted a tread portion having a three-layer structure and a compound for improving abrasion resistance in a first layer. The second layer is made of a compound having a low heat generation considering the improvement of chipping property, the third layer is made of a compound having high adhesiveness,
By arranging the respective tires, a heavy-duty pneumatic tire having improved heat resistance while improving wear resistance was successfully obtained, and the present invention has been accomplished. Hereinafter, this will be described in more detail.
【０００７】図１に示すように、本発明に従った重荷重
用空気入りタイヤはトレッド部１をキャップ−Ａ層２、
キャップ−Ｂ層３及びベース−Ｃ層４の３層構造とし、
以下に説明するように、Ａ，Ｂ及びＣの３層のショルダ
ー部５及びクラウンセンター部６のゲージ厚並びにＡ，
Ｂ及びＣの構成ゴムを特定化することにより前記目的を
達成したものである。なお、図１に示すように、本発明
に従ったトレッド部１の溝底７はキャップ−Ａ層２に位
置する。As shown in FIG. 1, a heavy-duty pneumatic tire according to the present invention comprises a tread portion 1 having a cap-A layer 2,
A three-layer structure of a cap-B layer 3 and a base-C layer 4,
As described below, the gauge thicknesses of the shoulder portion 5 and the crown center portion 6 of the three layers A, B and C,
The object has been achieved by specifying the constituent rubbers of B and C. In addition, as shown in FIG. 1, the groove bottom 7 of the tread portion 1 according to the present invention is located in the cap-A layer 2.
【０００８】本発明に係る空気入りタイヤのトレッド部
のショルダー部及びクラウンセンター部でのＡ層／Ｂ層
／Ｃ層のゲージ比はそれぞれ３５〜８０／６０〜２０／
２〜２０（合計で１００％とする）、好ましくはそれぞ
れ４０〜７０／５０〜３０／３〜１０とする必要があ
る。In the pneumatic tire according to the present invention, the gage ratio of the A layer / B layer / C layer at the shoulder portion and the crown center portion of the tread portion is 35 to 80/60 to 20 /
2 to 20 (total 100%), preferably 40 to 70/50 to 30/3 to 10 respectively.
【０００９】本発明に係る空気入りタイヤのトレッド部
のＡ，Ｂ及びＣ層を構成するゴムは従来からタイヤ用ゴ
ム組成物に一般的に配合されている天然ゴム（ＮＲ）、
ポリイソプレンゴム（ＩＲ）、各種スチレン−ブタジエ
ン共重合体ゴム（ＳＢＲ）、各種ポリブタジエンゴム
（ＢＲ）を単独又は任意のブレンドとして使用すること
ができる。[0009] The rubber constituting the A, B and C layers of the tread portion of the pneumatic tire according to the present invention is a natural rubber (NR) which has conventionally been generally compounded in a rubber composition for tires.
Polyisoprene rubber (IR), various styrene-butadiene copolymer rubbers (SBR), and various polybutadiene rubbers (BR) can be used alone or as an arbitrary blend.
【００１０】本発明に係る空気入りタイヤのトレッド部
のキャップ−Ａ層はＮＲ／ＢＲ／ＳＢＲ＝１００〜５０
／０〜４０／０〜４０（重量％比）（合計１００％）、
好ましくはＮＲ／ＢＲ／ＳＢＲ＝１００〜５０／０〜４
０／０〜４０で構成され、かつ、下記ｔａｎδ（１００
℃）の関係を満足しなければならない。The cap-A layer in the tread portion of the pneumatic tire according to the present invention has NR / BR / SBR = 100 to 50.
/ 0-40 / 0-40 (weight% ratio) (total 100%),
Preferably NR / BR / SBR = 100-50 / 0-4
0/0 to 40, and the following tan δ (100
° C).
【００１１】本発明に係る空気入りタイヤのトレッド部
のキャップ−Ｂ層及びベース−Ｃ層は、それぞれ独立
に、ＮＲ及び／又はＩＲ、好ましくはＮＲ単独で構成さ
れ、且つ下記ｔａｎδ（１００℃）の関係を満足しなけ
ればならない。The cap-B layer and the base-C layer of the tread portion of the pneumatic tire according to the present invention are each independently composed of NR and / or IR, preferably NR alone, and have the following tan δ (100 ° C.) The relationship must be satisfied.
【００１２】本発明に従った空気入りタイヤのトレッド
部の層Ａ及びＢのそれぞれのｔａｎδ（１００℃）の値
ｔａｎδ（Ａ）及びｔａｎδ（Ｂ）は本発明の目的を達
成するためには以下の関係を有する必要がある。 ｔａｎδ（Ａ）＞ｔａｎδ（Ｂ） … （Ｉ） ｔａｎδ（Ｂ）≦０．６ｔａｎδ（Ａ） … （II）The values of tan δ (100 ° C.) tan δ (A) and tan δ (B) of the layers A and B of the tread portion of the pneumatic tire according to the present invention are as follows in order to achieve the object of the present invention. Need to have a relationship. tan δ (A)> tan δ (B) (I) tan δ (B) ≦ 0.6 tan δ (A) (II)
【００１３】上記１００℃のｔａｎδ（Ａ）の値がｔａ
ｎδ（Ｂ）の値より大きくない場合には初期から中期に
かけての耐摩耗性が十分に発現されないので好ましくな
く、また１００℃のｔａｎδ（Ｂ）の値が上記（II）の
関係を満たさない場合には本発明におけるタイヤトレッ
ド全体の発熱低減効果が不十分となるので好ましくな
い。The value of tan δ (A) at 100 ° C. is ta
When the value is not larger than nδ (B), the wear resistance from the initial stage to the middle period is not sufficiently exhibited, which is not preferable. When the value of tanδ (B) at 100 ° C. does not satisfy the above relation (II). Is not preferable because the effect of reducing the heat generation of the entire tire tread in the present invention becomes insufficient.
【００１４】本発明のＡ，Ｂ及びＣ層においては前記し
たゴムにカーボンブラックを配合する。本発明で使用す
るカーボンブラックとしては従来から重荷重用空気入り
タイヤに使用されているカーボンブラックを用いること
ができる。In the layers A, B and C of the present invention, carbon black is blended with the above rubber. As the carbon black used in the present invention, carbon black conventionally used in pneumatic tires for heavy loads can be used.
【００１５】本発明に係る空気入りタイヤ用トレッド部
のＡ，Ｂ及びＣ層を構成するゴム組成物には、前記した
必須成分に加えて、他のカーボンブラック、シリカなど
の補強剤（フィラー）、加硫剤、加硫促進剤、各種オイ
ル、老化防止剤、可塑剤などの従来から空気入りタイヤ
用に一般的に配合されている各種添加剤を配合すること
ができ、かかる配合物は一般的な方法で混練、加硫して
組成物とし、加硫することができる。これらの添加剤の
配合量も本発明の目的に反しない限り、従来の一般的な
配合量とすることができる。The rubber composition constituting the A, B and C layers of the tread for a pneumatic tire according to the present invention contains, in addition to the above-mentioned essential components, other reinforcing agents (fillers) such as carbon black and silica. Various additives conventionally used for pneumatic tires such as vulcanizing agents, vulcanization accelerators, various oils, anti-aging agents, and plasticizers can be compounded. Can be kneaded and vulcanized by a conventional method to obtain a composition and vulcanized. The compounding amounts of these additives can also be conventional general compounding amounts, as long as they do not contradict the object of the present invention.
【００１６】[0016]
【実施例】以下、実施例によって本発明を更に説明する
が、本発明の範囲をこれらの実施例に限定するものでな
いことは言うまでもない。EXAMPLES Hereinafter, the present invention will be further described with reference to Examples, but it goes without saying that the scope of the present invention is not limited to these Examples.
【００１７】実施例１〜４及び比較例１〜３ 表Ｉに示す構成のトレッド層Ａ−１又はＡ−２、Ｂ−１
又はＢ−２及びＣ−１又はＣ−２層を調製した。使用し
たゴム及びカーボンブラックは以下の通りである。 ＮＲ：天然ゴム（ＲＳＳ ３号） ＢＲ：日本ゼオン製 ＢＲ，Ｎｉｐｏｌ ＢＲ１２２０ ＳＢＲ：日本ゼオン製 ＳＢＲ Ｎｉｐｏｌ １５０２ カーボンブラックＳＡＦ：東海カーボン製 シースト９ カーボンブラックＩＳＡＦ：昭和キャボット製 ショウ
ブラックＮ２２０ Examples 1 to 4 and Comparative Examples 1 to 3 Tread layers A-1 or A-2, B-1 having the constitution shown in Table I
Alternatively, B-2 and C-1 or C-2 layers were prepared. The rubber and carbon black used are as follows. NR: Natural rubber (RSS No. 3) BR: BR, Nipol BR1220 made by Nippon Zeon SBR: SBR Nipol 1502 made by Zeon Nippon Carbon Black SAF: Seast 9 carbon black made by Tokai Carbon: Show Black N220 made by Showa Cabot
【００１８】トレッド構成層Ａ−１〜Ｃ−２の各層を構
成するゴム組成物には以下の添加剤を共通に配合した
（配合量はゴム１００重量部当りの重量部である）。 成分 配合量 亜鉛華（ＪＩＳ ３号） ４ 工業用ステアリン酸 ３ 老化防止剤６ＰＰＤ（Ｎ−フェニル−Ｎ′−１，３−ジメチルブチル −ｐ−フェニレンジアミン） ２ 粉末硫黄 １．９０ 加硫促進剤ＣＢＳ（Ｎ−シクロヘキシル−２− ベンゾチアゾールスルフェンアミド） １．２The following additives were commonly blended in the rubber compositions constituting each of the tread constituent layers A-1 to C-2 (the blending amounts are parts by weight per 100 parts by weight of rubber). Ingredients Amounts zinc white (JIS 3 No.) 4 Industrial stearate 3 Antioxidant 6PPD (N-phenyl--N'-1,3-dimethylbutyl--p- phenylenediamine) 2 powder sulfur 1.90 Vulcanization accelerator CBS (N-cyclohexyl-2-benzothiazolesulfenamide) 1.2
【００１９】サンプルの調製 表Ｉに示す配合において、加硫促進剤と硫黄を除く成分
を１．８リットルの密閉型ミキサーで３〜５分間混練
し、１６５±５℃に達したときに放出してマスターバッ
チを得た。このマスターバッチに加硫促進剤と硫黄を８
インチのオープンロール混練し、ゴム組成物を得た。次
に、この組成物を１５×１５×０．２cmの金型中で１６
０℃で２０分間プレス加硫して目的とする試験片（ゴム
シート）を調製し、加硫物性を評価した。結果を表Ｉに
示す。 Sample Preparation In the formulation shown in Table I, the components other than the vulcanization accelerator and sulfur were kneaded in a 1.8-liter closed mixer for 3 to 5 minutes and released when the temperature reached 165 ± 5 ° C. A master batch was obtained. 8 vulcanization accelerator and sulfur
An inch open roll was kneaded to obtain a rubber composition. Next, the composition was placed in a mold of 15 × 15 × 0.2 cm for 16 hours.
The target test piece (rubber sheet) was prepared by press vulcanization at 0 ° C. for 20 minutes, and the vulcanization properties were evaluated. The results are shown in Table I.
【００２０】各例において得られた組成物の評価物性の
試験方法は以下の通りである。 ｔａｎδ（１００℃）：（株）東洋精機製作所製粘弾性
スペクトロメーターを用いて初期歪１０％、振幅±２
％、周波数２０Hz、温度１００℃で測定した。 耐摩耗性指数：ランボーン摩耗試験機（岩本製作所
（株）製）を使用して、荷重５kg、スリップ率２５％、
時間４分、室温の条件での摩耗減量を指数として示し
た。この指数は大きい程望ましい。The test methods for the physical properties of the compositions obtained in the respective examples are as follows. tan δ (100 ° C.): Initial strain 10%, amplitude ± 2 using a viscoelastic spectrometer manufactured by Toyo Seiki Seisaku-sho, Ltd.
%, Frequency 20 Hz, temperature 100 ° C. Wear resistance index: Using a Lambourn abrasion tester (manufactured by Iwamoto Seisakusho Co., Ltd.), load 5 kg, slip rate 25%,
The wear loss under the conditions of a time of 4 minutes and room temperature was shown as an index. The larger the index, the better.
【００２１】[0021]
【表１】 [Table 1]
【００２２】次に、上で得たタイヤトレッド用ゴム組成
物Ａ−１〜Ｃ−２を表IIに示す組み合せ及びゲージ比で
用いて３層構造のタイヤトレッド部を製造した。今回は
３色押出機を用いて一体押出で実施したが、Ａ／Ｂ／Ｃ
をそれぞれ単独押出を圧着成形したもの、或いはＡ／Ｂ
一体押出、−Ｃ単独押出（或いはＡ単独、−Ｂ／Ｃ一体
押出）を圧着成形しても構わない。Next, a tire tread having a three-layer structure was manufactured by using the rubber compositions A-1 to C-2 for tire tread obtained above in combinations and gauge ratios shown in Table II. This time, the extrusion was performed in one piece using a three-color extruder.
Each of which is press-molded by single extrusion, or A / B
Compression molding may be used for integral extrusion or -C single extrusion (or A alone or -B / C integral extrusion).
【００２３】[0023]
【表２】 [Table 2]
【００２４】得られた３層構造のタイヤトレッドの物性
を以下の方法で評価し、結果を表IIに示した。 トレッドｔａｎδ（１００℃）：Ａ／Ｂ／Ｃ各々のゲー
ジ比率とｔａｎδ（１００℃）をそれぞれ掛け合わせた
値の総和をトレッド全体のｔａｎδ（１００℃）とし
た。 発熱指数：トレッドｔａｎδ（１００℃）の比較例１の
値を１００℃とした指数で示した。低い程、発熱が低
く、発熱耐久性上好ましい。 トレッド耐摩耗指数：溝底から上部に位置するトレッド
に占める各々Ａ／Ｂ／Ｃのゲージ比率を表Ｉで示した。
耐摩耗性指数の積の和をトレッド耐摩耗性指数とした大
ほど耐摩耗性が良好であることを示す。The physical properties of the obtained three-layer tire tread were evaluated by the following methods, and the results are shown in Table II. Tread tan δ (100 ° C.): The sum of the values obtained by multiplying the respective gauge ratios of A / B / C and tan δ (100 ° C.) was defined as tan δ (100 ° C.) of the entire tread. Exothermic index: The index was set as an index when the value of Comparative Example 1 of tread tan δ (100 ° C.) was set to 100 ° C. The lower the heat generation, the lower the heat generation, which is preferable in heat generation durability. Tread abrasion index: Table I shows the gage ratio of A / B / C in the tread located from the groove bottom to the top.
The larger the sum of the products of the abrasion resistance indices was the tread abrasion resistance index, the better the abrasion resistance.
【００２５】耐チッピング性：溝底からのトレッド残溝
が新品時の１５％時点での表面状態を目視確認し、トレ
ッド部分の欠け（チッピング）の大きさより、耐チッピ
ング性良否を判断した。 評価基準：○…チッピング無〜小（チッピング０〜２m
m） △…チッピング中（チッピング２〜５mm） ×…チッピング大（チッピング５mm超） 成形作業性：押出日から３日後にトレッドを成形使用
し、成形ドラム上でトレッドを巻付ける作業で、トレッ
ド先端の剥がれ落ちの有無から成形作業性良否を判断し
た。 評価基準：○…ゴム揮発油塗布無しで剥がれ落ち無し。 △…ゴム揮発油塗布により剥がれ落ち無し。 ×…ゴム揮発油塗布に加えてワイヤブラシ掛けにより剥
がれ落ち無しChipping resistance: The surface condition of the remaining tread groove from the groove bottom at the time of 15% of the new condition was visually checked, and the chipping resistance was judged to be good or not based on the size of chipping (chipping) in the tread portion. Evaluation criteria: ○ ... No chipping to small (chipping 0 to 2 m
m) △: chipping (chipping 2-5mm) ×: large chipping (chipping more than 5mm) Molding workability: molding and using the tread 3 days after the extrusion date, winding the tread on the molding drum, tread tip The quality of the molding workability was judged from the presence or absence of peeling off. Evaluation criteria:…: No peeling off without applying rubber volatile oil. Δ: No peeling off due to rubber volatile oil application. ×: No peeling off by wire brushing in addition to rubber volatile oil application
【００２６】[0026]
【発明の効果】以上の通り、本発明に従えば、耐摩耗性
と摩耗の中期以降の耐チッピング性を向上させながら耐
熱性を向上させることにより耐発熱耐久性を向上させる
ことができる。また、天然ゴム単独またはＢＲ・ＳＢＲ
ブレンドからなるＡで耐摩耗性確保および溝底クラック
防止を狙い、Ｂ／Ｃは天然ゴム主体によりタック確保を
図った。As described above, according to the present invention, the heat resistance can be improved by improving the heat resistance while improving the wear resistance and the chipping resistance after the middle stage of wear. In addition, natural rubber alone or BR / SBR
B / C was made of natural rubber to ensure tackiness, with the aim of ensuring the abrasion resistance and preventing cracks at the groove bottom with A made of the blend.
【図１】本発明に係る重荷重用空気入りタイヤのトレッ
ド部の構造の一例を示す図面である。FIG. 1 is a drawing showing an example of the structure of a tread portion of a heavy duty pneumatic tire according to the present invention.
１…トレッド部 ２…キャップ−Ａ層 ３…キャップ−Ｂ層 ４…ベース−Ｃ層 ５…ショルダー部 ６…クラウンセンター部 ７…溝底 DESCRIPTION OF SYMBOLS 1 ... Tread part 2 ... Cap-A layer 3 ... Cap-B layer 4 ... Base-C layer 5 ... Shoulder part 6 ... Crown center part 7 ... Groove bottom
Claims (1)
Ａ，キャップ−Ｂ及びベース−Ｃの３層構造から成り、
かつキャップ−Ａ層に溝底が位置するトレッド部を有す
る重荷重用空気入りタイヤにおいて、 ショルダー部及びクラウンセンター部でのＡ層／Ｂ層／
Ｃ層のゲージ比が３５〜８０／６０〜２０／２〜２０
（合計１００％とする）で、 キャップ−Ａ層が天然ゴム／ポリブタジエンゴム／スチ
レンブタジエン共重合体ゴム＝１００〜５０／０〜４０
／０〜４０（重量％比）（合計１００％とする）から構
成され、 キャップ−Ｂ層およびベース−Ｃ層が独立に天然ゴムお
よび／またはポリイソプレンゴムから構成され、そして
キャップ−Ａ層及びキャップ−Ｂ層の１００℃における
ｔａｎδ（Ａ）及びｔａｎδ（Ｂ）が以下の関係： ｔａｎδ（Ａ）＞ｔａｎδ（Ｂ） … （Ｉ） ｔａｎδ（Ｂ）≦０．６ｔａｎδ（Ａ） … （II） を満足する重荷重用空気入りタイヤ。1. The tire according to claim 1, wherein the tread portion is a cap from the tire surface.
A, a three-layer structure of Cap-B and Base-C,
In a heavy duty pneumatic tire having a tread portion in which a groove bottom is located in the cap-A layer, the A layer / B layer /
Gauge ratio of C layer is 35 to 80/60 to 20/2 to 20
(Total 100%), the cap-A layer is made of natural rubber / polybutadiene rubber / styrene butadiene copolymer rubber = 100-50 / 0-40
/ 0 to 40 (weight% ratio) (total 100%), wherein the cap-B layer and the base-C layer are independently composed of natural rubber and / or polyisoprene rubber, and the cap-A layer and The tan δ (A) and tan δ (B) at 100 ° C. of the cap-B layer have the following relationship: tan δ (A)> tan δ (B) (I) tan δ (B) ≦ 0.6 tan δ (A) (II) A pneumatic tire for heavy loads that satisfies the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000213408A JP4765149B2 (en) | 2000-07-10 | 2000-07-10 | Heavy duty pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000213408A JP4765149B2 (en) | 2000-07-10 | 2000-07-10 | Heavy duty pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002019418A true JP2002019418A (en) | 2002-01-23 |
| JP4765149B2 JP4765149B2 (en) | 2011-09-07 |
Family
ID=18709166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000213408A Expired - Fee Related JP4765149B2 (en) | 2000-07-10 | 2000-07-10 | Heavy duty pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4765149B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002019416A (en) * | 2000-07-10 | 2002-01-23 | Yokohama Rubber Co Ltd:The | Pneumatic studless tire for heavy load |
| US20100059156A1 (en) * | 2008-09-11 | 2010-03-11 | Cambron Anne-France Gabrielle | Pneumatic tire |
| US20130048179A1 (en) * | 2011-08-31 | 2013-02-28 | Philippe Joseph Auguste Muller | Truck drive tire |
| US20140041777A1 (en) * | 2012-08-07 | 2014-02-13 | The Goodyear Tire & Rubber Company | Tread made from multi cap compounds |
| CN104558702A (en) * | 2013-10-29 | 2015-04-29 | 山东风轮轮胎有限公司 | Sizing material formula of wear-resisting tire crown of all-steel radial tire |
| US9050859B2 (en) | 2012-08-07 | 2015-06-09 | The Goodyear Tire & Rubber Company | Tread made from multi cap compounds |
| JP2016502951A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| JP2016502949A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| JP2016502950A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| JP2017210044A (en) * | 2016-05-24 | 2017-11-30 | 住友ゴム工業株式会社 | Pneumatic tire |
| US20230322026A1 (en) * | 2021-10-26 | 2023-10-12 | Sumitomo Rubber Industries, Ltd. | Heavy duty tire |
| WO2023248510A1 (en) * | 2022-06-24 | 2023-12-28 | 株式会社ブリヂストン | Tire for heavy load |
| WO2023248509A1 (en) * | 2022-06-24 | 2023-12-28 | 株式会社ブリヂストン | Tyre for heavy loads |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002019416A (en) * | 2000-07-10 | 2002-01-23 | Yokohama Rubber Co Ltd:The | Pneumatic studless tire for heavy load |
| US20100059156A1 (en) * | 2008-09-11 | 2010-03-11 | Cambron Anne-France Gabrielle | Pneumatic tire |
| US8701727B2 (en) * | 2011-08-31 | 2014-04-22 | The Goodyear Tire & Rubber Company | Truck drive tire |
| US20130048179A1 (en) * | 2011-08-31 | 2013-02-28 | Philippe Joseph Auguste Muller | Truck drive tire |
| US9050859B2 (en) | 2012-08-07 | 2015-06-09 | The Goodyear Tire & Rubber Company | Tread made from multi cap compounds |
| US20140041777A1 (en) * | 2012-08-07 | 2014-02-13 | The Goodyear Tire & Rubber Company | Tread made from multi cap compounds |
| US9050860B2 (en) * | 2012-08-07 | 2015-06-09 | The Goodyear Tire & Rubber Company | Tread made from multi cap compounds |
| JP2016502951A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| JP2016502949A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| JP2016502950A (en) * | 2012-12-10 | 2016-02-01 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Tire with tread composed of several types of elastomeric compounds |
| CN104558702A (en) * | 2013-10-29 | 2015-04-29 | 山东风轮轮胎有限公司 | Sizing material formula of wear-resisting tire crown of all-steel radial tire |
| JP2017210044A (en) * | 2016-05-24 | 2017-11-30 | 住友ゴム工業株式会社 | Pneumatic tire |
| US20230322026A1 (en) * | 2021-10-26 | 2023-10-12 | Sumitomo Rubber Industries, Ltd. | Heavy duty tire |
| WO2023248510A1 (en) * | 2022-06-24 | 2023-12-28 | 株式会社ブリヂストン | Tire for heavy load |
| WO2023248509A1 (en) * | 2022-06-24 | 2023-12-28 | 株式会社ブリヂストン | Tyre for heavy loads |
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