Abstract:
A tire cord for the belts of a radial or bias-belted tire, is described as consisting of only two brass-coated metal wires which are helically twisted to have a lay length of from 14 to 18 millimeters. Each of the wires has a diameter of 0.28 millimeters, and is composed of steel which has a carbon content of at least 0.80%, by weight.
Abstract:
A metallic cable for reinforcing elastomeric articles comprises two strands of two filaments twisted together and having a cable lay length. The filaments of each strand are twisted together and the strands have strand lay lengths that are equal to one another but different from the cable lay length. The direction of twist of the strands may be either the same as, or opposite to the direction of twist of the cable.
Abstract:
A steel cord composed of four material wires of the same diameter twisted together, of which two material wires are stuck together and intertwisted at the center and each of the other two material wires is arranged on both sides of the former two material wires with a certain space left between the former and the latter. The latter two material wires are twisted about the former two material wires in the same twist direction and at the same pitch as the former two material wires into a steel cord. The steel cord thus composed facilitates infiltration of a rubber compound into the central part of the steel cord, ensures perfect adhesion between the rubber compound and the steel cord, checks elongation under a very low load, stabilizes twist construction in the lengthwise direction and improves an anti-fatigue characteristic.
Abstract:
Un procédé de fabrication d'un assemblage (A) d'éléments filaires (14) enroulés ensemble en hélice comprend : - une étape de retordage d'au moins des premier et deuxième éléments filaires (14), les premier et deuxième éléments filaires (14) étant retordus séparément l'un de l'autre, - une étape de préformation en hélice d'au moins les premier et deuxième éléments filaires retordus (14), les premier et deuxième éléments filaires retordus (14) étant préformés séparément l'un de l'autre, - une étape d'assemblage d'au moins les premier et deuxième éléments filaires (14) retordus et préformés pour former l'assemblage (A) d'éléments filaires (14).
Abstract:
The invention relates to cord (20) comprising a number of filaments twisted together. The peripheral surface of the cord (20) is at least partially coated with an adhesion promoting coating (24). The adhesion promoting coating (24) comprises at least a first layer comprising a silicon based coating, a titanium based coating, a zirconium based coating or a combination thereof. The invention further relates to a composite material comprising such a cord (20) embedded in a polymer material. Furthermore the invention relates to a method to manufacture such a cord (20).
Abstract:
Metal cord comprising at least one preformed elementary metal wire, said metal cord having: - an elongation at break, measured on the bare cord, higher than or equal to 3%, preferably of from 4% to 6%; an elongation at break, measured on the rubberized and vulcanized cord, which differs of an amount not higher than or equal to 15%, preferably of from 2% to 10% with respect to the elongation at break measured on the bare cord; a part load elongation (PLE) , measured on the bare cord, higher than or equal to 0.4%, preferably of from 0.5% to 1.5%; a part load elongation (PLE) , measured on the rubberized and vulcanized cord, which differs of an amount not higher than or equal to 15%, preferably of from 0.5% to 10%, with respect to the part load elongation (PLE) measured on the bare cord.
Abstract:
A steel structure adapted for the reinforcement of elastomers, said steel reinforcement comprising one or more steel filaments (10). At least one of said steel filaments (10) is provided with a first crimp and a second crimp. The first crimp lies in a plane that is substantially different from the plane of the second crimp. Applying both crimps can be done in an efficient way by means of two pairs (12, 14) of toothed wheels which are not externally driven. By means of these crimps it is possible to obtain steel structures with an increased penetration of rubber or with an increased elongation at break.