Nv Bekaert Sa

Zhichao Cheng

Pengfei Wang

Jiankao Chen

Huanjiong Pang

Rik Mullebrouck

Hongzhen Zhu

Yiwen Luo

Hao Zhou

Junhua Kan

A steel cord () comprises a plurality of steel filaments () arranged in parallel to the longitudinal axis of the steel cord () without twisting. The steel cord () further comprises a wrapping filament () twisted around the steel cord (). Each of said steel filaments () is a flat wire having flat surfaces. The steel filament () near the center of the steel cord () has a bigger width than the steel filaments () further away from the center of the steel cord () such that the cross-section of said steel cord () approximates an oval shape with the bending stiffness around the shorter axis of the oval shape being greater than the bending stiffness around the longer axis. In a tire, the steel cord being used as a reinforcement, the longer axis being arranged perpendicular to the radial direction of the tire.

Steel cord comprising flat wires

A steel cord () adapted for the reinforcement of elastomeric products comprises a core strand () and a layer of outer strands () arranged around the core strand (). The core strand () comprises a core and at least a layer arranged around the core. The core further comprises one to three core filaments and the layer further comprises three to nine layer filaments. The core strand () has a first wave form and each filament of the outer strands () has a second wave form such that the first wave form is substantially different from the second wave form. This allows to guarantee full rubber penetration.

Multi-strand steel cord with waved core strand

A steel cord () adapted for the reinforcement of rubber products, comprises a core strand () and six peripheral strands () concentrically surrounding the core strand (). Each of the core and peripheral strands () comprises a center of two or more center filaments () and two layers of filaments surrounding the center. The core strand () has a diameter Dwhich is greater than the diameter Dof the peripheral strands (). All the filaments () of each layer have substantially the same diameter and a radially outer layer has a twist angle which is greater than a twist angle of a radially inner layer of the same strand. Each of the strands () in the cord is composed of no more than twenty-six filaments () being twisted together.

Open multi-strand cord

A steel cord used for reinforcing rubber product with an oval cross-section has a structure of m+n, while m is the number of core wires () and n is the number of the outer layer wires (). The core wire () is untwisted while m is 1 or the core wires () are untwisted and aligned in parallel while m is between 2 and 4, and the outer layer wires () are twisted around said core wires (). The core wires () are oval wires and the outer layer wires () are round wires. The wires () in the steel cord have a carbon content not less than 0.60%.

Oval steel cord with oval wires

A steel cord () adapted for the reinforcement of rubber products, the steel cord () comprises a core () and three or more outer strands () twisted around the core () in a cord twisting direction. The outer strands () comprise outer filaments () twisted in a strand twisting direction which is the same as the cord twisting direction. The outer strands () have a wavy form which makes spaces between the core () and the outer strands. The steel cord () has improvements on elongation at break and impact resistance capacity.

Growing community of inventors

Jiangyin, China

Zhichao Cheng