To provide a heavy duty tire having excellent durability.SOLUTION: A heavy duty tire comprises a bead apex rubber having the inside and outside apex parts. At least one selected from the group consisting of the inside and outside apex parts includes isoprene rubber, carbon black and a modified rubber material functionalized by thiuram sulfide-based compound. The complex elastic modulus (Ei*) of the inside apex part and that modulus (Eo*) of the outside apex part satisfy the following expressions (1) and (2): (1) Ei*>Eo* and (2) Ei*/Eo*≤7.0 (here, Ei* and Eo* are complex elastic moduli measured under conditions of 70°C, initial strain of 5%, dynamic strain of 1%, frequency of 10 Hz and elongation mode).SELECTED DRAWING: None

    【課題】優れた耐久性を有する重荷重用タイヤを提供する。【解決手段】内側エーペックス部及び外側エーペックス部を有するビードエーペックスゴムを備えた重荷重用タイヤであって、前記内側エーペックス部及び前記外側エーペックス部からなる群より選択される少なくとも1つは、イソプレン系ゴムと、カーボンブラックと、チウラムスルフィド系化合物で官能化された変性ゴム材料とを含み、前記内側エーペックス部の複素弾性率(Ei*)、前記外側エーペックス部の複素弾性率(Eo*)は、下記式(1)~(2)を満たす重荷重用タイヤ。(1)Ei*>Eo*(2)Ei*/Eo*≦7.0(Ei*、Eo*は、温度70℃、初期歪5%、動歪1%、周波数10Hz、伸長モードの条件下で測定した複素弾性率である。)【選択図】なし


    Access

    Download


    Export, share and cite



    Title :

    HEAVY DUTY TIRE


    Additional title:

    重荷重用タイヤ


    Contributors:

    Publication date :

    2023-01-20


    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



    HEAVY-DUTY TIRE

    NAKASATO REO / SATO TAIKI | European Patent Office | 2023

    Free access

    HEAVY DUTY TIRE

    TODOROKI DAISUKE | European Patent Office | 2022

    Free access

    Heavy duty tire

    HIMEDA SHINGO | European Patent Office | 2022

    Free access

    HEAVY DUTY TIRE

    HABA TOSHIFUMI | European Patent Office | 2022

    Free access

    HEAVY DUTY TIRE

    NAKASATO REO / SATO TAIKI | European Patent Office | 2021

    Free access