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公开(公告)号：US20170211229A1
公开(公告)日：2017-07-27
申请号：US15328962
申请日：2015-07-28
Applicant: BRIDGESTONE CORPORATION
Inventor： Yusuke NOZAKI
CPC classification number: D07B1/0626 , B60C9/00 , B60C9/0007 , D07B1/06 , D07B1/0613 , D07B2201/2006 , D07B2201/202 , D07B2201/2051 , D07B2201/2061 , D07B2801/24
Abstract: Provided is a steel cord for reinforcing a rubber article which can further improve cut resistance when applied to a tire while maintaining the amount of steel to be used. A steel cord for reinforcing a rubber article comprising: one core strand 11 having a two-layered layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. A ratio dc/ds of a diameter dc of a sheath filament constituting the sheath of the core strand to a diameter ds of an outermost layer sheath filament constituting the outermost layer sheath of the sheath strand is more than 1.25 and not more than 1.50.
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公开(公告)号：US20170210170A1
公开(公告)日：2017-07-27
申请号：US15329266
申请日：2015-07-28
Applicant: BRIDGESTONE CORPORATION
Inventor： Yusuke NOZAKI
CPC classification number: B60C9/0007 , B60C9/00 , B60C9/18 , B60C9/20 , B60C2009/0092 , D07B1/06 , D07B1/0613 , D07B1/062 , D07B1/0626 , D07B1/0633 , D07B2201/2006 , D07B2201/2029 , D07B2201/2037 , D07B2201/2051 , D07B2201/2061 , D07B2401/208 , D07B2801/14 , D07B2801/12 , D07B2801/24
Abstract: Provided is a steel cord for reinforcing a rubber article in which both the rubber penetrability (rust prevention), and the cord strength and shear resistance are highly achieved. Provided is a steel cord for reinforcing a rubber article including: one core strand 11 having a layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. An average value Lc of an amount of clearance between outermost layer sheath filaments constituting an outermost layer sheath of the core strand is from 0.073 to 0.130 mm, and the number of the outermost layer sheath filaments is from 7 to 10.
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公开(公告)号：US20170210169A1
公开(公告)日：2017-07-27
申请号：US15328731
申请日：2015-07-28
Applicant: BRIDGESTONE CORPORATION
Inventor： Yusuke NOZAKI
CPC classification number: B60C9/0007 , B60C9/00 , D07B1/0613 , D07B1/062 , D07B1/0626 , D07B1/0633 , D07B2201/202 , D07B2201/2029 , D07B2201/2037 , D07B2201/204 , D07B2201/2051 , D07B2201/2061 , D07B2201/2068 , D07B2801/14 , D07B2801/24
Abstract: Provided is a steel cord for reinforcing a rubber article which can further improve cut resistance when applied to a tire. Provided is a steel cord for reinforcing a rubber article including: one core strand 11 having a layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. A ratio S1/S of the sum S1 of cross-sectional areas of outermost layer sheath filaments constituting an outermost layer sheath of the core strand to the sum S of cross-sectional areas of all filaments constituting the core strand is from 0.69 to 0.74, and a ratio Ps/P of the sum Ps of strengths of the sheath strands to strength P of the cord as a whole is from 0.81 to 0.85.
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公开(公告)号：US20190234016A1
公开(公告)日：2019-08-01
申请号：US16378668
申请日：2019-04-09
Applicant: BRIDGESTONE CORPORATION
Inventor： Yusuke NOZAKI
CPC classification number: D07B1/0613 , B60C9/0007 , B60C2200/065 , D07B1/0626 , D07B1/0633 , D07B2201/2006 , D07B2201/202 , D07B2201/2051 , D07B2201/2061 , D07B2501/2046
Abstract: Provided is a steel cord for reinforcing a rubber article which can further improve cut resistance when applied to a tire. Provided is a steel cord for reinforcing a rubber article including: one core strand 11 having a layered-twisted structure formed by twisting a plurality of steel filaments 1; and a plurality of sheath strands 12 having a layered-twisted structure formed by twisting a plurality of steel filaments 2, wherein the sheath strands are twisted around the core strand. A ratio S1/S of the sum S1 of cross-sectional areas of outermost layer sheath filaments constituting an outermost layer sheath of the core strand to the sum S of cross-sectional areas of all filaments constituting the core strand is from 0.69 to 0.74, and a ratio Ps/P of the sum Ps of strengths of the sheath strands to strength P of the cord as a whole is from 0.81 to 0.85.
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