Steel cord for rubber reinforcement
AssigneeNV Bekaert SA
InventorsAijun Zhang, Haijun Ma, Yaodong Li
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Abstract
The invention provides a steel cord with a construction of n×1, n is the number of the steel filaments of the steel cord, the steel cord has an elongation at 2.5N-50N of less than 1.2% and a twist pitch of greater than 16 mm, each of the steel filaments has a form of helical wave with a wave length L expressed in mm and a wave height H expressed in mm when being unravelled from said steel cord, L is greater than 16 mm, each of the steel filaments has a space volume Vs satisfying that, Vs=L×H2×π/4, and Vs>20 mm3. The invention steel cord is beneficial for the stress distribution.
Claims12
A steel cord having a construction of n×1,
- wherein the steel cord has n number of steel filaments, n ranging from 2-7,
- wherein the steel cord has an elongation between 2.5N and 50N of less than 1.2%,
- wherein the steel cord has a twist pitch of greater than 20 mm,
- wherein each of the steel filaments has a form of helical wave with a wave length L expressed in mm and a wave height H expressed in mm when being unravelled from the steel cord,
- wherein the L is greater than 16 mm, and
- wherein each of the steel filaments has a space volume Vs satisfying:
- Vs=L×H2×π/4, and
- Vs is greater than 20 mm3 and smaller than 200 mm3.
Dependencies are inferred from the claim text.