To provide a pneumatic radial tire that can effectively reduce road noise while excellently maintaining durability.SOLUTION: The pneumatic radial tire comprises a tread part 1, a pair of side wall parts 2 and a pair of bead parts 3, where a carcass layer 4 is hung between the pair of bead parts 3 and 3, a plurality of belt layers 7 are arranged at an outer periphery side of the carcass layer 4 in the tread part 1, and a belt cover layer 8 including a plurality of organic fiber cords wound around spirally along a tire circumferential direction is arranged at an outer periphery side of the belt layer. For the belt cover layer 8, a polyethylene terephthalate fiber cord is used whose elasticity rate at 44 N loads at 100°C is in a range of 3.5 cN/(tex.%)-5.5 cN/(tex.%), where a thickness of a rubber layer adjacent to the outer periphery side of the belt cover layer 8 is set to a range of 0.1 mm-5.0 mm and the rubber layer is composed of a rubber composition blended with 0.5 pts.mass-10 pts.mass of a methylene donor containing amine with respect to 100 pts.mass of diene system rubber.SELECTED DRAWING: Figure 1

    【課題】耐久性を良好に維持しながら、ロードノイズを効果的に低減することを可能にした空気入りラジアルタイヤを提供する。【解決手段】トレッド部1と一対のサイドウォール部2と一対のビード部3とを備えると共に、一対のビード部3,3間にカーカス層4が装架され、トレッド部1におけるカーカス層4の外周側に複数層のベルト層7が配置され、該ベルト層の外周側にタイヤ周方向に沿って螺旋状に巻回された複数本の有機繊維コードを含むベルトカバー層8が配置された空気入りラジアルタイヤにおいて、ベルトカバー層8に100℃での44N負荷時の弾性率が3.5cN/(tex・%)〜5.5cN/(tex・%)の範囲にあるポリエチレンテレフタレート繊維コードを使用し、ベルトカバー層8の外周側に隣接するゴム層の厚さを0.1mm〜5.0mmの範囲に設定し、且つ、当該ゴム層をジエン系ゴム100質量部に対してアミンを含むメチレン供与体が0.5質量部〜10質量部配合されたゴム組成物で構成する。【選択図】図1


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    Title :

    PNEUMATIC RADIAL TIRE


    Additional title:

    空気入りラジアルタイヤ


    Contributors:

    Publication date :

    2020-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



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