公开(公告)号：US20200055341A1

公开(公告)日：2020-02-20

申请号：US16663557

申请日：2019-10-25

Applicant: BRIDGESTONE CORPORATION

Inventor： Naohiko OBANA ,  Mikito KONDO

IPC: B60C9/00 ,  D07B1/06

Abstract: Provided is a multi-twisted steel cord for reinforcing a rubber article, the steel cord having cord strength with a small loss as compared to the total strength of filaments constituting the cord and a high rubber penetration. The steel cord includes a plurality of twisted strands in a multi-twisted structure, each strand including a plurality of twisted filaments in two or more layers, in which at least some of the filaments have a tensile strength of 3,000 MPa or more, the steel cord satisfying a filament occupancy of 48% or more and less than 54%, a cord twist angle of 78° or more and less than 84°, an average crossing angle between adjacent filaments other than wrapping filaments of less than 17°, and a gap between adjacent sheath filaments constituting the strand of 0.065 mm or more.

公开(公告)号：US20210254279A1

公开(公告)日：2021-08-19

申请号：US17251313

申请日：2019-06-12

Applicant: BRIDGESTONE CORPORATION

Inventor： Naohiko OBANA ,  Yoshiaki OONO

IPC: D07B1/06 ,  B65G15/36

Abstract: The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.

公开(公告)号：US20150376351A1

公开(公告)日：2015-12-31

申请号：US14768247

申请日：2014-02-28

Applicant: BRIDGESTONE CORPORATION

Inventor： Naohiko OBANA

IPC: C08J5/00

CPC classification number: C08J5/00 ,  B60C9/0007 ,  C08J2321/00 ,  D07B1/0606 ,  D07B1/066 ,  D07B2201/2003 ,  D07B2201/2005 ,  D07B2201/2009 ,  D07B2201/2014 ,  D07B2205/3057 ,  D07B2401/206 ,  D07B2801/10

Abstract: Provided are a rubber article reinforcing steel wire that is superior in bending fatigue properties to the related art and has a flat cross-sectional shape, and a rubber article using the wire. In a rubber article reinforcing steel wire 10, a major diameter and a minor diameter are substantially perpendicular to each other. Assuming that the major diameter is W, the minor diameter is T, a straight line that passes through a center of the major diameter in a width direction and is parallel to a minor diameter direction is L1, a straight line that passes through a center of the minor diameter in a width direction and is parallel to a major diameter direction is L2, an intersection point of the L1 and the L2 is a center point C, a region within a half of a distance from the center point C to a surface is a central region Rc, and a region outside the central region Rc is a surface layer region Rs, a Vickers hardness Hvc of the central region Rc is more than a Vickers hardness Hvs of the surface layer region Rs; and assuming that a Vickers hardness on the L1 in the surface layer region Rs is Hv1, and a Vickers hardness on the L2 in the surface layer region Rs is Hv2, relationships represented by Hvc−Hv1≦150, Hvc−Hv2≦150, Hv1/Hvc×100≧85.11, and Hv2/Hvc×100≧79.84 are satisfied.

Abstract translation: 本发明提供一种与现有技术相比弯曲疲劳特性优异并且具有平坦的横截面形状的橡胶制品加强钢丝以及使用该丝的橡胶制品。 在橡胶制品加强钢丝10中，大直径和小直径基本上彼此垂直。 假设长径为W，小直径为T，在宽度方向上通过长径方向的中心并且与小径方向平行的直线为L1，通过中心的直线 宽度方向的小直径与长径方向平行的方向为L2，L1和L2的交点为中心点C，从中心点C到表面的距离的半数以内的区域为 中心区域Rc和中心区域Rc之外的区域是表面层区域Rs，中心区域Rc的维氏硬度Hvc大于表面层区域Rs的维氏硬度Hvs; 假设表层区域Rs中的L1的维氏硬度为Hv1，表层区域Rs中的L2的维氏硬度为Hv2，则由Hvc-Hv1＆lt; 150; Hvc-Hv2＆lt; 150; Hv1 / Hvc×100≥85.11，Hv2 / Hvc×100≥79.84。