Steel cord for rubber reinforcement
AssigneeNV Bekaert SA
InventorsAijun Zhang, Haijun Ma
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Abstract
The invention provides a steel cord, the steel cord comprises two or more steel filaments, at least one of the steel filaments has a twist pitch of 6 mm to 40 mm, each of the steel filaments has a tip rise of less than 5 mm with a gauge length of 200 mm after being unravelled out of the steel cord. The invention steel cord has an improved straightness with reduced steel filament fracture risk.
Claims15
A steel cord comprising two or more steel filaments, at least one of said steel filaments has a twist pitch of 6 mm to 40 mm, wherein each of said two or more steel filaments has a tip rise of less than 5 mm, the tip rise of steel filament being measured by unravelling the steel filament from the steel cord, cutting the steel filament to have 6 samples with a gauge length of 200 mm, measuring a tip rise for each sample, and taking the highest value of the tip rise of 6 samples as the tip rise of the steel filament.
Dependencies are inferred from the claim text.