To provide a cap tread and a passenger car tire capable of improving overall performance of fuel economy and fracture strength while having good dimensional stability.SOLUTION: There is provided a cap tread of a passenger car tire having a rubber composition A phase and a rubber composition B phase which each independently have a boundary, wherein the rubber composition A phase contains 100 pts.mass or more of silica and 10 pts.mass or less of carbon black based on 100 pts.mass of a rubber component and the rubber composition B phase contains 10 pts.mass or more of carbon black and 13 to 20 pts.mass of silica based on 100 pts.mass of a rubber component and the rubber composition B phase is divided into the rubber composition A phase and independently exists in the rubber composition A phase.SELECTED DRAWING: None
【課題】良好な寸法安定性を有しつつ、低燃費性、破壊強度の総合性能を改善できるキャップトレッド及び乗用車タイヤを提供する。【解決手段】互いに独立して境界を有するゴム組成物A相とゴム組成物B相を有し、ゴム組成物A相において、ゴム成分100質量部に対してシリカを100質量部以上、カーボンブラックを10質量部以下含有し、ゴム組成物B相において、ゴム成分100質量部に対してカーボンブラックを10質量部以上、シリカを13~20質量部含有し、ゴム組成物B相が、ゴム組成物A相に分断されて、ゴム組成物A相中に独立して存在する乗用車タイヤのキャップトレッドに関する。【選択図】なし
CAP TREAD AND PASSENGER CAR TIRE
キャップトレッド及び乗用車タイヤ
02.12.2022
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
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