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    Steel cord, rubber-steel cord composite and tire
    171.
    发明专利
    Steel cord, rubber-steel cord composite and tire 审中-公开
    钢丝绳，钢丝绳复合材料和轮胎

    公开(公告)号：JP2007217807A

    公开(公告)日：2007-08-30

    申请号：JP2006037822

    申请日：2006-02-15

    Applicant: Bridgestone Corp ,  株式会社ブリヂストン

    Inventor： IKEHARA KIYOSHI

    IPC: D07B1/06 ,  B60C9/00 ,  B60C9/20 ,  B60C9/22

    CPC classification number: B60C9/22 ,  B60C9/0007 ,  B60C9/2006 ,  D07B1/0613 ,  D07B1/0626 ,  D07B1/0633 ,  D07B2201/1004 ,  D07B2201/1032 ,  D07B2201/1044 ,  D07B2201/1076 ,  D07B2201/202 ,  D07B2201/2021 ,  D07B2201/2023 ,  D07B2201/2024 ,  D07B2201/204 ,  D07B2201/2059 ,  D07B2401/208 ,  D07B2501/2046 ,  D07B2801/12

    Abstract: PROBLEM TO BE SOLVED: To provide a steel cord especially useful for reinforcement application to tire crowns, able to be efficiently produced with stable quality without causing for any trouble in production as in conventional production, a rubber-steel cord composite and a tire.
    SOLUTION: The steel cord has a multiple strand structure in which N (N=2-8) strands 2 prepared by twisting two or more element wires 1 are twisted. In the steel cord, ε
    c is defined by the following formula, wherein d(mm) expresses the diameter of the strand, D(mm) expresses the diameter of a circumscribed circle of the cord and P(mm) expresses a twisting pitch: ε
    c =√(-b/2+√(b
    2 /4-c))-1 [wherein b expresses -1+π
    2 (-4R
    2 +d
    2 )/P
    2 ; c expresses π
    2 d
    2 k(4π
    2 R
    2 +P
    2 )/P
    4 ; R expresses (D-d)/2; k expresses tan
    2 (π/2-π/N)] and satisfies ε
    c ≥0.005. The tire has a reinforcing layer using the rubber-steel cord composite as a reinforcing material.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题：为了提供特别适用于轮胎冠的加强应用的钢帘线，能够以高质量的方式高效率地生产，而不会像常规生产那样在生产中产生任何麻烦，橡胶钢帘线复合材料和 胎。 解决方案：钢丝绳具有通过扭转两根或更多根丝线1制成的N（N = 2-8）绳股2的多股线结构。 在钢帘线中，ε c 由下式定义，其中d（mm）表示股线的直径，D（mm）表示绳索的外接圆的直径和P（ mm）表示扭曲间距：ε（b / 2 +√（b 2 / 4-c））-1] [其中b表示-1+ π 2 （ - 4R 2 + D 2 ）/ P 2 ; c表示π 2 2 2 2 2 2 ）/ P 4 ; R表示（D-d）/ 2; k表示tan 2 （π/ 2-π/ N）]，并满足ε c ≥0.005。 轮胎具有使用橡胶 - 钢帘线复合材料作为增强材料的增强层。 版权所有（C）2007，JPO＆INPIT

    Steel cord for rubber reinforcement and pneumatic radial tire
    173.
    发明专利
    Steel cord for rubber reinforcement and pneumatic radial tire 审中-公开
    钢丝绳用于橡胶加固和气动辐射轮胎

    公开(公告)号：JP2005002518A

    公开(公告)日：2005-01-06

    申请号：JP2003168930

    申请日：2003-06-13

    Applicant: Bridgestone Corp ,  株式会社ブリヂストン

    Inventor： AOYAMA MASANORI

    IPC: D07B1/06 ,  B60C9/00 ,  B60C9/08 ,  B60C9/20

    CPC classification number: D07B1/0613 ,  D07B2201/1014 ,  D07B2201/1068 ,  D07B2201/202 ,  D07B2201/2051 ,  D07B2201/2061 ,  D07B2401/2005 ,  D07B2801/24

    Abstract: PROBLEM TO BE SOLVED: To provide a steel cord for rubber reinforcement which satisfies all properties of fatigue resistance, cutting resistance and corrosion resistance and further improved in durability and a pneumatic radial tire using the steel cord as a reinforcing material. SOLUTION: The steel cord for rubber reinforcement is composed of a core strand 2 having two or more layers-twisted structure and a sheath strand 1 surrounding the core strand 2. The twist structure of the sheath strand 1 is represented by the formula n×m. The relationship between a diameter d1 of the sheath strand 1 and a diameter d2 of the core strand 2 is preferably represented by the formula d2≥d1. The elongation E1 which results in fracture of the sheath strand 1 is preferably represented by the formula E1≥1.5 (%). COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种满足耐疲劳性，耐切割性和耐腐蚀性的所有性能以及进一步提高耐久性的橡胶增强钢丝帘线，以及使用钢帘线作为增强材料的充气子午线轮胎。 解决方案：用于橡胶加固的钢丝绳由具有两层或更多层扭曲结构的芯股2和围绕芯股2的鞘股1组成。鞘股1的扭曲结构由式 n×m个。 鞘股线1的直径d1与芯股2的直径d2之间的关系优选由公式d2≥d1表示。 导致鞘股1的断裂的伸长率E1优选由式E1≥1.5（％）表示。 版权所有（C）2005，JPO＆NCIPI

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