TIRE STEEL CORD AND PNEUMATIC TIRE USING SAME

    公开(公告)号:US20190202240A1

    公开(公告)日:2019-07-04

    申请号:US16323046

    申请日:2017-07-27

    Inventor: Yuriko MORI

    Abstract: Provided are: a tire steel cord having not only excellent cutting resistance and corrosion resistance but also excellent processability in plant; and a pneumatic tire including the same. The tire steel cord has a layer-twisted structure including: a core 11 composed of two core filaments 1; and a sheath 12 composed of eight sheath filaments 2 that are twisted together around the core 11, in which tire steel cord the two core filaments 1 constituting the core 11 are twisted together, the twisting direction of the core filaments 1 and that of the sheath filaments 2 are different, and a diameter (Dc) of the core filaments 1 and a diameter (Ds) of the sheath filaments 2 satisfy a relationship represented by the following Equation (1): 0.90≤Ds/Dc≤1.10  (1).

    PNEUMATIC TYRE
    6.
    发明申请
    PNEUMATIC TYRE 审中-公开
    气动轮胎

    公开(公告)号:US20160167435A1

    公开(公告)日:2016-06-16

    申请号:US14906314

    申请日:2014-07-22

    Abstract: This invention provides a pneumatic tire having its weight reduced without degrading the durability of bead portions.Provided is a pneumatic tire comprising, as a framework, at least one carcass ply comprising a steel cord covered with rubber. Letting d (mm) be the cord diameter of the steel cord and T (MPa) be the tensile strength of a steel filament forming the steel cord, the following relation is satisfied: a1T−b1>d>a2T+b2 (where a1 is 3.65×10−4 mra/MPa, b1 is 0.42 mm, a2 is −8.00×10−5 mm/MPa, and b2 is 0.78 mm), and the tensile strength T of the steel filament is 3000 MPa (exclusive) to 4000 MPa (exclusive) and the number of hits E under a bead core of the steel cord in the carcass ply is 12 hits/25 mm (exclusive) to 38 hits/25 mm (exclusive).

    Abstract translation: 本发明提供了一种其重量减轻而不降低胎圈部分的耐久性的充气轮胎。 提供一种充气轮胎,其包括作为框架的至少一个胎体帘布层,其包括用橡胶覆盖的钢帘线。 设d(mm)为钢帘线的帘线直径,T(MPa)为形成钢帘线的钢丝的拉伸强度,满足以下关系:a1T-b1> d> a2T + b2(其中a1为 3.65×10-4mra / MPa,b1为0.42mm,a2为-8.00×10-5mm / MPa,b2为0.78mm),钢丝的拉伸强度T为3000MPa(排他性)为4000 在胎体帘布层中,钢帘线的胎圈芯下的压缩强度(独占)和击打次数E为12次/ 25mm(专用)至38次/ 25mm(排他性)。

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