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US 11,325,419 B2Granted
Steel cord for rubber reinforcement
AssigneeNV Bekaert SA
InventorsHe Wang, Yuping Wang, Ming Zhao
Life of this patent
Estimating the term…
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AssigneeNV Bekaert SA
InventorsHe Wang, Yuping Wang, Ming Zhao
Estimating the term…
A steel cord containing a core layer and an sheath layer, the core layer containing a plurality of core wires with a number of n and the sheath layer comprises a plurality of sheath wires with a number of m, and the steel cord has a flat cross-section with a major axis and a minor axis, the flat cross-section has a flat ratio being the ratio of the length of the major axis and the length of the minor axis, the flat ratio is more than 1.2, the steel cord has a breaking load being BLcord, the core wires and the sheath wires have a sum breaking load being Sum BLwires when the core wires and the sheath wires are un-twisted from the steel cord, BLcord and Sum BLwires satisfies the following formula: BLcord/Sum BLwires>96%. The steel cord has higher breaking load.
A steel cord, comprising a core layer and a sheath layer, said core layer comprising a plurality of core wires with a number of n and said sheath layer comprising a plurality of sheath wires with a number of m, said n ranges from 2 to 3, said m ranges from 6 to 12 said steel cord having a flattened cross-section with a major axis and a minor axis, said flattened cross-section having a flat ratio being the ratio of the length of said major axis and the length of said minor axis, said flat ratio being more than 1.2, said steel cord having a breaking load being BLcord, the sum of the breaking load of said core wires and said sheath wires which are unraveled from said steel cord being Sum BLwires wherein, said BLcord and said Sum BLwires satisfies the following formula:
Dependencies are inferred from the claim text.