PROBLEM TO BE SOLVED: To provide a bead core of which a weight can be sufficiently saved while maintaining durability, and a pneumatic tire with use of the bead core.SOLUTION: A bead core 5 for a tire including a laminate of plural bead wires 10. A cross section of the bead wire 10 is polygonal. A side 15 includes a first side 16 which surface-contacts other adjacent bead wire, and a second wire 17 which does not contact other adjacent bead wire 10. In a cross section of the bead core 5, plural non-wire region 20 surrounded by the second side 17 of the bead wire 10 are formed. A cross-sectional area of each non-wire region 20 is 15% to 100% of a cross-sectional area of the bead wire 10.SELECTED DRAWING: Figure 2

    【課題】耐久性を維持しつつ十分に軽量化が可能なビードコア及びそれを用いた空気入りタイヤを提供する。【解決手段】複数のビードワイヤ10の積層体を含むタイヤ用のビードコア5である。ビードワイヤ10の横断面は、多角形状である。辺15は、隣接する他のビードワイヤと面接触する第1辺16と、隣接する他のビードワイヤ10と接触しない第2辺17とを含む。ビードコア5の横断面において、複数のビードワイヤ10の第2辺17で囲まれた非ワイヤ領域20が形成されている。各非ワイヤ領域20の断面積は、ビードワイヤ10の断面積の15%〜100%である。【選択図】図2


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    Title :

    BEAD CORE AND PNEUMATIC TIRE WITH USE OF BEAD CORE


    Additional title:

    ビードコア及びそれを用いた空気入りタイヤ


    Contributors:

    Publication date :

    2017-06-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen / D07B ROPES OR CABLES IN GENERAL , Seile oder Kabel allgemein



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