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1. (WO2018198776) STEEL CORD FOR REINFORCING RUBBER ARTICLE, METHOD FOR MANUFACTURING SAME, AND TIRE

Pub. No.:    WO/2018/198776    International Application No.:    PCT/JP2018/015257
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Thu Apr 12 01:59:59 CEST 2018
IPC: D07B 1/06
B60C 9/00
Applicants: BRIDGESTONE CORPORATION
株式会社ブリヂストン
Inventors: OBANA Naohiko
尾花 直彦
KONDO Mikito
近藤 幹人
Title: STEEL CORD FOR REINFORCING RUBBER ARTICLE, METHOD FOR MANUFACTURING SAME, AND TIRE
Abstract:
Provided is a steel cord for reinforcing a rubber article the cord strength of which to the total strength of filaments constituting the cord does not easily decrease and that has high rubber impregnation ability for a double twisted steel cord. A steel cord for reinforcing a rubber article has a double twisted structure wherein a plurality of strands, each of which is obtained by intertwining a plurality of filaments in two or more layers, are intertwined. At least some of the filaments have a tensile strength of 3000 MPa or greater. A filament space factor of 48% or greater and less than 54%, a cord twisting angle of 78° or greater and less than 84°, an average value for a crossing angle for adjacent filaments other than wrapping filaments of less than 17°, and a space between adjacent sheath filaments constituting the strand of 0.065 mm or greater are satisfied.