JPH03295704A - Rneumatic tire - Google Patents
Rneumatic tireInfo
- Publication number
- JPH03295704A JPH03295704A JP2096467A JP9646790A JPH03295704A JP H03295704 A JPH03295704 A JP H03295704A JP 2096467 A JP2096467 A JP 2096467A JP 9646790 A JP9646790 A JP 9646790A JP H03295704 A JPH03295704 A JP H03295704A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- rubber composition
- jis hardness
- cap
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 239000005060 rubber Substances 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 18
- 150000002484 inorganic compounds Chemical class 0.000 claims abstract description 15
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 15
- 230000006866 deterioration Effects 0.000 abstract 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 235000002639 sodium chloride Nutrition 0.000 description 10
- 239000011780 sodium chloride Substances 0.000 description 8
- 239000011324 bead Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
- B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、乾燥路操縦安定性（以下、ドライ操安性とい
う）を実質的に損なうことなしに氷上摩擦性能を向上さ
せた空気入りタイヤに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a pneumatic tire that has improved friction performance on ice without substantially impairing dry road handling stability (hereinafter referred to as dry handling stability). Regarding.
凍結した路面、特に氷と水とが混在するような０℃付近
の路面は、滑り易く、自動車の走行が危険である。Frozen road surfaces, especially roads at temperatures around 0° C. where ice and water coexist, are slippery and dangerous for motor vehicles.
そこで、従来、このような路面での安全な走行を可能と
するために、例えば、タイヤのトレッド部を低温でも軟
質のゴム材料で構成したり、発泡ゴム材料で構成したり
している。しかしながら、この場合、トレッド部が軟ら
かくなるためドライ操安性に劣るという問題がある。Conventionally, in order to enable safe driving on such road surfaces, tire treads have been made of, for example, a rubber material that is soft even at low temperatures, or a foamed rubber material. However, in this case, there is a problem in that the tread portion becomes soft, resulting in poor dry driving stability.
本発明は、このような事情にかんがみなされたものであ
って、ドライ操安性を実質的に損なうことなしに氷上摩
擦性能を向上させた空気入りタイヤを提供することを目
的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pneumatic tire that has improved friction performance on ice without substantially impairing dry handling performance.
本発明の空気入りタイヤは、トレッド部がベーストレッ
ドＮの外側にキャップトレッドＭが配置された２層構造
であって、ベーストレッドＮに対するキャップトレッド
Ｍの比Ｍ／Ｎが体積比で２／８〜８／２であり、キャッ
プトレッドＭがＪＩＳ硬度Ｉｓ ５０〜６５のゴム組成
物Ａで構成されると共にベーストレンドＮがＪＩＳ硬度
Ｈｓ５３〜６８のゴム組成物Ｂで構成され、ゴム組成物
ＢのＪＩＳ硬度硬度上３ム組成物ＡのＪＩＳ硬度Ｉｆ。In the pneumatic tire of the present invention, the tread portion has a two-layer structure in which a cap tread M is arranged on the outside of a base tread N, and the ratio M/N of the cap tread M to the base tread N is 2/8 in terms of volume ratio. ~8/2, the cap tread M is composed of rubber composition A having a JIS hardness of Is 50 to 65, and the base trend N is composed of a rubber composition B having a JIS hardness of Hs 53 to 68. JIS hardness: JIS hardness If of composition A.
よりも大きく、さらに、ゴム組成物Ａは水溶性無機化合
物をその粒子同士が実質的に互いに接触していない状態
で含有してなることを特徴とする。Rubber composition A is further characterized in that it contains a water-soluble inorganic compound in a state in which the particles are not substantially in contact with each other.
このように本発明では、タイヤのトレッド部をキャップ
トレンドＭとベーストレッドＮとの２層構造となし、キ
ャップトレッドＭを構成するゴム組成物Ａが水溶性無機
化合物をその粒子同士が実質的に互いに接触していない
状態で含有するため、凍結した路面の走行時にトレッド
表面の水溶性無機化合物が路面の水に溶は出してトレッ
ド表面に凹凸が形成されるので、氷上摩擦性能を高める
ことができる。また、ベーストレンドＮを構成するゴム
組成物ＢのＪＩＳ硬度ＨｓをキャップトレッドＭを構成
するゴム組成物ＡのＪＩＳ硬度硬度上３も大きくしたた
めに、トレッド部が全体としては軟らかくはならないの
で、ドライ操安性が実質的に損なわれることがない。In this way, in the present invention, the tread portion of the tire has a two-layer structure of the cap trend M and the base tread N, and the rubber composition A constituting the cap tread M contains a water-soluble inorganic compound whose particles are substantially Because they are contained in a state where they are not in contact with each other, when driving on frozen roads, the water-soluble inorganic compounds on the tread surface dissolve into the water on the road surface, forming unevenness on the tread surface, which improves friction performance on ice. can. In addition, since the JIS hardness Hs of the rubber composition B constituting the Base Trend N was increased by 3 on the JIS hardness of the rubber composition A constituting the cap tread M, the tread portion as a whole would not be soft. Stability is not substantially impaired.
以下、図を参照して上記手段につき詳しく説明する。Hereinafter, the above means will be explained in detail with reference to the drawings.
第１図は本発明の空気入りタイヤの子午線方向断面説明
図、第２図はそのＴ部の要部拡大説明図である。第１図
において、本発明の空気入りタイヤは、左右一対のビー
ド部１，１とこれらビード部１．１に連結する左右一対
のサイドウオール部２．２とこれらサイドウオール部２
゜２間に配されるトレッド部３からなる。左右−対のビ
ード部１．１間にはカーカス層４が装架されており、ト
レッド部３においてはカーカス層４の外周を取り囲むよ
うにベルト層５が配置されている。FIG. 1 is an explanatory cross-sectional view in the meridian direction of the pneumatic tire of the present invention, and FIG. 2 is an enlarged explanatory view of the main part of the T section thereof. In FIG. 1, the pneumatic tire of the present invention includes a pair of left and right bead portions 1, 1, a pair of left and right sidewall portions 2.2 connected to these bead portions 1.1, and these sidewall portions 2.
It consists of a tread portion 3 disposed between . A carcass layer 4 is mounted between the left and right pairs of bead portions 1.1, and a belt layer 5 is arranged in the tread portion 3 so as to surround the outer periphery of the carcass layer 4.
本発明では、トレッド部３は、第２図に示すように、ベ
ーストレンドＮの外側にキャップトレッドＭが配置され
た２層構造からなる。In the present invention, the tread portion 3 has a two-layer structure in which a cap tread M is disposed outside a base trend N, as shown in FIG.
ベーストレッドＮに対するキャップトレッドＭの比Ｍ／
Ｎは２／８〜８／２（体積比）である。キャップトレッ
ドＭが２未満では摩耗による氷上摩擦性能を低下が早く
、実用的でない。Ratio of cap tread M to base tread N M/
N is 2/8 to 8/2 (volume ratio). If the cap tread M is less than 2, the friction performance on ice will deteriorate quickly due to wear, which is not practical.
一方、８を超えるとトレン・ド部３におけるキャップト
レンドＭの占める割合が大きくなり過ぎてドライ操安性
が損なわれることになる。On the other hand, if it exceeds 8, the ratio of the cap trend M in the trend section 3 becomes too large, impairing dry driving stability.
キャップトレッドＭは、ＪＩＳ硬度Ｈｓ５０〜６５のゴ
ム組成物Ａで構成される。ＪＩＳ硬度Ｉｓが５０未満で
はキャップトレッドＭが軟らか（なり過ぎてドライ操安
性がわるくなる。６５を超えると乗心地が悪化してしま
う。The cap tread M is composed of a rubber composition A having a JIS hardness of Hs 50 to 65. If the JIS hardness Is is less than 50, the cap tread M will be too soft (too much, resulting in poor dry handling). If it exceeds 65, the ride comfort will deteriorate.
ベーストレッドＮは、ＪＩＳ硬度Ｈ５５３〜６８のゴム
組成物Ｂで構成される。５３未満ではドライ操安性がわ
るくなり、６８を超えると硬くなり過ぎて乗心地が悪化
する。The base tread N is composed of rubber composition B having a JIS hardness of H553 to H68. If it is less than 53, dry handling becomes poor, and if it exceeds 68, it becomes too hard and the ride comfort deteriorates.
ゴム組成物ＢのＪＩＳ硬度Ｈ５はゴム組成物ＡのＪＩＳ
硬度Ｈｓよりも大である。ベーストレッドＮをキャップ
トレンドＭよりも硬くしてドライ操安性が実質的に損な
われないようにするためである。The JIS hardness H5 of rubber composition B is the JIS hardness of rubber composition A.
Hardness is greater than Hs. This is to make the base tread N harder than the cap trend M so that dry handling stability is not substantially impaired.
ゴム組成物Ａは、水溶性無機化合物をその粒子同士が実
質的に互いに接触していない状態で含有する。ここで用
いる水溶性無機化合物は、“０℃の飽和溶液１００ｇ中
に１ｇ以上存在する”という０℃における水への溶解度
を有するものである。この水溶性無機化合物としては、
例えば、塩化カリウム、塩化カルシウム、塩化鉄、塩化
ナトリウム、塩化バリウム、塩化マグネシウムなどの金
属塩化物；硝酸カリウム、硝酸ナトリウム等の硝酸化物
；炭酸カリウム、炭酸ナトリウム等の炭酸化合物；硫酸
亜鉛、硫酸銅、硫酸化鉄等の硫酸化合物が挙げられる。Rubber composition A contains a water-soluble inorganic compound in a state in which the particles are not substantially in contact with each other. The water-soluble inorganic compound used here has a solubility in water at 0°C such that 1g or more is present in 100g of a saturated solution at 0°C. This water-soluble inorganic compound is
For example, metal chlorides such as potassium chloride, calcium chloride, iron chloride, sodium chloride, barium chloride, and magnesium chloride; nitrates such as potassium nitrate and sodium nitrate; carbonate compounds such as potassium carbonate and sodium carbonate; zinc sulfate, copper sulfate, Examples include sulfuric acid compounds such as iron sulfate.
これらのうち、塩化ナトリウム、特に塩化ナトリウムを
主成分とする食塩を用いるのが好ましい。食塩は、入手
し易く、安価だからである。また、９０重量％以上が塩
化ナトリウムおよび／又は塩化カルシウムであるものを
用いるのが好ましい。Among these, it is preferable to use sodium chloride, particularly common salt containing sodium chloride as a main component. This is because salt is easily available and inexpensive. Moreover, it is preferable to use one in which 90% by weight or more is sodium chloride and/or calcium chloride.
この水溶性無機化合物は、ゴム組成物Ａ内において粒子
同士が実質的に互いに接触していない。すなわち、ゴム
組成物Ａ内において、水溶性無機化合物の個々の粒子が
実質的に独立に分散した状態となっている。このように
分散していない場合には、すなわち、粒子同士が互いに
接触している場合には、そのゴム組成物Ａでタイヤのキ
ャップトレッドＭを構成して凍結した路面を走行すると
キャップトレッドＭの内部の水溶性無機化合物まで溶は
出してトレッド表面からキャップトレッドＭの内部に至
る連通孔が生じ、キャップトレッドＭが内部まで発泡状
態となり、軟らかくなって耐摩耗性が損なわれるからで
ある。The particles of this water-soluble inorganic compound are not substantially in contact with each other in the rubber composition A. That is, within the rubber composition A, the individual particles of the water-soluble inorganic compound are substantially independently dispersed. If the particles are not dispersed in this way, that is, if the particles are in contact with each other, then when the cap tread M of the tire is made of the rubber composition A and the tire is driven on a frozen road surface, the cap tread M will be This is because even the water-soluble inorganic compounds inside are leached out, creating communication holes from the tread surface to the inside of the cap tread M, and the cap tread M becomes foamed to the inside, becoming soft and impairing wear resistance.
水溶性無機化合物の個々の粒子を実質的に独立に分散さ
せるには、水溶性無機化合物の粒径および配合量を適宜
勘案して水溶性無機化合物をゴム組成物に配合し、混練
を行えばよい。すなわち、粒径が大きいときには配合量
を少なくし、一方、粒径が小さいときには配合量を多く
するなどすればよい。水溶性無機化合物の平均粒径は、
５〜２０００μＭであることが好ましい。In order to substantially independently disperse individual particles of a water-soluble inorganic compound, the water-soluble inorganic compound is blended into a rubber composition, taking into consideration the particle size and blending amount of the water-soluble inorganic compound, and kneaded. good. That is, when the particle size is large, the amount to be blended may be reduced, while when the particle size is small, the amount to be blended may be increased. The average particle size of water-soluble inorganic compounds is
It is preferable that it is 5-2000 micromol.
５μ鋼未満では混合、分散が困難となり、２０００μ昂
を超えると氷上摩擦性能を向上させるのが困難となる。If the steel is less than 5μ, it will be difficult to mix and disperse, and if it exceeds 2000μ, it will be difficult to improve the friction performance on ice.
配合量は、ゴム組成物Ａの全容量のうち１〜５０容量％
程度である。１容量％未満では効果が期待できず、５０
容量％超では粒子が相互に接触してしまうためゴム強度
が低くなってしまい、摩耗、チッピング等が生じ不利と
なる。The blending amount is 1 to 50% by volume of the total volume of rubber composition A.
That's about it. If it is less than 1% by volume, no effect can be expected;
If it exceeds % by volume, the rubber strength will decrease because the particles will come into contact with each other, resulting in disadvantages such as abrasion and chipping.
ゴム組成物ＡおよびＢをそれぞれ構成するゴムとしては
、特に限定されるものではなく、例えば、天然ゴム、合
成ポリイソプレンゴム、ポリブタジェンゴム、スチレン
−ブタジェン共重合体ゴムなどのジエン系ゴムである。The rubbers constituting the rubber compositions A and B are not particularly limited, and include diene rubbers such as natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, and styrene-butadiene copolymer rubber. be.
このゴム組成物は、カーボンブラックなどの配合剤を他
に適宜含有する。This rubber composition appropriately contains other compounding agents such as carbon black.
以下に実施例を示す。Examples are shown below.
実施例
第１表に示す配合内容（重量部）でゴム組成物■〜■を
作製した。EXAMPLE Rubber compositions (1) to (2) were prepared using the formulations (parts by weight) shown in Table 1.
（本頁以下余白）
第１表
注）
傘１ ： Ｎ−（１，３−ジメチルブチｔｒ、ｒ）−Ｈ
’−フェニル−Ｐ−フェニレンジアミン。(Margins below this page) Table 1 Note) Umbrella 1: N-(1,3-dimethylbutytr,r)-H
'-Phenyl-P-phenylenediamine.
傘２−Ｎ−シクロヘキシルー２−ベンゾチアゾリルスル
ヘンアミド。Umbrella 2-N-cyclohexyl-2-benzothiazolylsulfenamide.
＊３： 日本タバコ産業■製の「キッチンソルト」（食
塩の商品名）。食塩の主成分は、塩化ナトリウム９９２
以上、平均粒径４００μｍ、比重２．１６１゜これらの
ゴム組成物で第２表に示すようにそれぞれトレッド部を
構成してタイヤサイズ１８５／７０ Ｒ１３の空気入り
タイヤを作製した（比較タイヤ１、比較タイヤ２、本発
明タイヤ）。*3: "Kitchen Salt" (trade name of table salt) manufactured by Japan Tobacco. The main component of table salt is sodium chloride 992
As shown in Table 2, pneumatic tires with a tire size of 185/70 R13 were manufactured using these rubber compositions with an average particle diameter of 400 μm and a specific gravity of 2.161° as shown in Table 2. Comparative tire 2, tire of the present invention).
これらのタイヤについて下記によりドライ操安性および
氷上摩擦性能を評価した。この結果を第２表に示す。These tires were evaluated for dry handling and on-ice friction performance as described below. The results are shown in Table 2.
ドーイ°へ の９゛：
国産５座セダンに各タイヤをそれぞれ装着し、乾燥した
テストコースを走行して、操縦安定性をドライバーのフ
ィーリングにより決めた。数値の大きい方がよい。9゛ to Doi°: Each type of tire was installed on a domestically produced five-seat sedan and driven on a dry test course, and the driving stability was determined based on the driver's feeling. The higher the number, the better.
上 −叱の蕾パ：
各タイヤをそれぞれ国産５座セダンに装着し、氷温−８
℃の氷結路面を気温−１２℃の下に走行して時速３０
ｋｍ／ｈからの制動停止距離を測定し、下記式により制
動指数を求めた。数値が大きい方が氷上摩擦性能が高い
。Above: The buds of scolding: Each tire was installed on a domestic 5-seat sedan, and the freezing temperature was -8.
Driving on an icy road at -12°C at 30 mph
The braking stopping distance from km/h was measured, and the braking index was determined using the following formula. The larger the number, the better the friction performance on ice.
（本頁以下余白）
第２表から、本発明タイヤがドライ操安性を実質的に損
なうことなく氷上摩擦性能を向上さ４゜
せ得ることが判る。(Margins below this page) Table 2 shows that the tire of the present invention can improve the friction performance on ice by 4 degrees without substantially impairing dry handling performance.
以上説明したように本発明によれば、トレッド部をベー
ストレンドＮの外側にキャップトレッドＭが配置された
２層構造とし、比Ｍ／Ｎを体積比で２／８〜８／２とし
、キャップトレッドＭをＪＩＳ硬度Ｈ５５０〜６５のゴ
ム組成物Ａで構成すると共にベーストレッドＮをＪＩＳ
硬度Ｈｓ５３〜６８のゴム組成物Ｂで構成し、ゴム組成
物ＢのＪＩＳ硬度硬度上３ム組成物ＡのＪＩＳ硬度硬度
上３も太き（し、さらに、ゴム組成物Ａに水溶性無機化
合物をその粒子同士が実質的に互いに接触していない状
態で含有させたため、ドライ操安性を実質的に損なうこ
となしに氷上摩擦性能を向上させることが可能となる。As explained above, according to the present invention, the tread portion has a two-layer structure in which the cap tread M is arranged outside the base trend N, the ratio M/N is set to 2/8 to 8/2 in volume ratio, and the cap The tread M is made of rubber composition A having a JIS hardness of H550 to 65, and the base tread N is made of a rubber composition A having a JIS hardness of H550 to 65.
It is composed of a rubber composition B having a hardness of Hs 53 to 68, and the rubber composition B has a hardness of 3 on the JIS hardness.The JIS hardness of the composition A is also 3 on the hardness. Since the particles are contained in a state in which the particles are not substantially in contact with each other, it is possible to improve friction performance on ice without substantially impairing dry handling performance.
第１図は本発明の空気入りタイヤの子午線方向断面説明
図、第２図はそのＴ部の要部拡大説明図である。FIG. 1 is an explanatory cross-sectional view in the meridian direction of the pneumatic tire of the present invention, and FIG. 2 is an enlarged explanatory view of the main part of the T section thereof.
Claims (1)
ドＭが配置された２層構造であって、ベーストレッドＮ
に対するキャップトレッドＭの比Ｍ／Ｎが体積比で２／
８〜８／２であり、キャップトレッドＭがＪＩＳ硬度Ｈ
＿ｓ５０〜６５のゴム組成物Ａで構成されると共にベー
ストレッドＮがＪＩＳ硬度Ｈ＿ｓ５３〜６８のゴム組成
物Ｂで構成され、ゴム組成物ＢのＪＩＳ硬度Ｈ＿ｓはゴ
ム組成物ＡのＪＩＳ硬度Ｈ＿ｓよりも大きく、さらに、
ゴム組成物Ａは水溶性無機化合物をその粒子同士が実質
的に互いに接触していない状態で含有してなる空気入り
タイヤ。The tread part has a two-layer structure in which a cap tread M is arranged on the outside of a base tread N.
The ratio M/N of the cap tread M to the cap tread M is 2/N in volume ratio.
8 to 8/2, and cap tread M has JIS hardness H
The base tread N is composed of rubber composition B having a JIS hardness of H_s53 to 68, and the JIS hardness H_s of the rubber composition B is higher than the JIS hardness H_s of the rubber composition A. bigger and more
Rubber composition A is a pneumatic tire containing a water-soluble inorganic compound in a state in which the particles are not substantially in contact with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096467A JPH03295704A (en) | 1990-04-13 | 1990-04-13 | Rneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096467A JPH03295704A (en) | 1990-04-13 | 1990-04-13 | Rneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03295704A true JPH03295704A (en) | 1991-12-26 |
Family
ID=14165840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2096467A Pending JPH03295704A (en) | 1990-04-13 | 1990-04-13 | Rneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03295704A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0781315A (en) * | 1993-09-20 | 1995-03-28 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| KR100518311B1 (en) * | 1998-11-11 | 2006-02-08 | 한국타이어 주식회사 | Snow studless tires with improved steering stability on dry roads |
| JP2008138046A (en) * | 2006-11-30 | 2008-06-19 | Sumitomo Rubber Ind Ltd | Studless tire |
| JP2008296894A (en) * | 2007-05-29 | 2008-12-11 | Shinji Takeda | Studless tire having large braking force |
| JP2010241414A (en) * | 2009-03-19 | 2010-10-28 | Shinji Takeda | Studless tire having large braking force |
| WO2014084402A1 (en) * | 2012-11-30 | 2014-06-05 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Pneumatic-tire tread and pneumatic tire having tread |
| CN108472988A (en) * | 2015-12-17 | 2018-08-31 | 米其林集团总公司 | Include the tire of tyre surface |
| CN112351895A (en) * | 2018-06-15 | 2021-02-09 | 米其林企业总公司 | Winter durable tread |
-
1990
- 1990-04-13 JP JP2096467A patent/JPH03295704A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0781315A (en) * | 1993-09-20 | 1995-03-28 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| KR100518311B1 (en) * | 1998-11-11 | 2006-02-08 | 한국타이어 주식회사 | Snow studless tires with improved steering stability on dry roads |
| JP2008138046A (en) * | 2006-11-30 | 2008-06-19 | Sumitomo Rubber Ind Ltd | Studless tire |
| JP2008296894A (en) * | 2007-05-29 | 2008-12-11 | Shinji Takeda | Studless tire having large braking force |
| JP2010241414A (en) * | 2009-03-19 | 2010-10-28 | Shinji Takeda | Studless tire having large braking force |
| WO2014084402A1 (en) * | 2012-11-30 | 2014-06-05 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Pneumatic-tire tread and pneumatic tire having tread |
| CN108472988A (en) * | 2015-12-17 | 2018-08-31 | 米其林集团总公司 | Include the tire of tyre surface |
| CN108472988B (en) * | 2015-12-17 | 2020-10-09 | 米其林集团总公司 | Tire comprising a tread |
| CN112351895A (en) * | 2018-06-15 | 2021-02-09 | 米其林企业总公司 | Winter durable tread |
| EP3807104A4 (en) * | 2018-06-15 | 2022-01-12 | Compagnie Generale Des Etablissements Michelin | A tread for winter and endurance |
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