Nv Bekaert Sa

Hans Cauwels

Stijn Vanneste

Dirk Meersschaut

An elongation cord adapted for the reinforcement of elastomer structures has a polymer core and three to nine strands twisted around the core with a cord twisting step in a cord twisting direction. At least one of the strands a first group of filaments and a second group of filaments. The first group of filaments is twisted with a first twisting step in a first twisting direction and the second group of filaments is twisted with a twisting step in a second twisting direction. The first twisting step is different from the second twisting step or the first twisting direction is different from the second twisting direction, or both. The first twisting direction is equal to the cord twisting direction and the first twisting step is equal to the cord twisting step.

Hybrid high elongation cord

A steel cord adapted for the reinforcement of elastomers includes: a core steel filament with a diameter dand coated with a polymer, six intermediate steel filaments with a diameter dsmaller than or equal to d, the intermediate steel filaments being twisted around the core steel filament, ten to eleven outer steel filaments with a diameter d, smaller than or equal to dwherein these outer steel filaments are twisted around the intermediate steel filaments, and the outer steel filaments are preformed in order to allow rubber penetration inside the cord. The core steel filament, the intermediate steel filaments, and the outer steel filaments all have a tensile strength of at least 2600 MPa. The cord has an outer diameter D according to the following formula: D&#x2266;d+2&#xd7;d+2&#xd7;d+0.1 mm, wherein all diameters are expressed in millimeters (mm).

Open layered steel cord with high breaking load

Steel cord includes a first group and a second group. The second group is helically twisted around the first group with a cord twisting step. The first group includes a first number of first steel filaments. The first number ranges between three and eight. The second group comprises a second number of second steel filaments. The second number is equal to or greater than the first number. The first filaments having a twist step greater than 300 mm. At least one of the second filaments is polygonally performed in order to allow rubber penetration.

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Adegem, Belgium

Hans Cauwels