Abstract:
A steel cord (1) for the reinforcement of rubber articles such as tires comprises a core consisting of two to four steel filaments (2) and a layer of steel filaments (3, 4) around the core. All the filaments have a diameter between 0.15 and 0.40 mm and are twisted in the same direction and at the same pitch. The cord has substantially over its entire length cross-sections where the accumulated gaps between adjacent layer filaments are at least 0.03 mm. At least one filament of the layer has been preformed differently from the other filaments. Core migration is avoided.
Abstract:
Une carcasse métallique (1) destinée à renforcer les articles en caoutchouc tels que les pneus, comprend un noyau constitué d'entre deux et quatre filaments en acier (2) et d'une couche de filaments en acier (3, 4) disposée autour du noyau. Tous les filaments ont un diamètre compris entre 0,15 et 0,40 mm et sont retordus dans le même sens et au même pas. Sur sensiblement toute sa longueur, la carcasse possède des coupes transversales où les espaces accumulés entre les filaments contigus de la couche sont d'au moins 0,03 mm. Au moins un filament de la couche est préformé de façon différente aux autres filaments. La migration du noyau est évitée.
Abstract:
A steel cord for the reinforcement of rubber articles comprises a central base structure (1) composed of 1 to 4 steel filaments, and at least one coaxial layer (2, 3, 4) composed of a plurality of steel filaments arranged around the central base structure, these steel filaments being twisted in the same direction at the same pitch. In the steel cord of this type, the steel filaments constituting the central base structure have the same diameter (dc), while at least one steel filament of the coaxial layer has a diameter (dso) les than the diameter (dc) of the steel filament in the central base structure. The ratio dc/dso is from 1.03 to 1.25.
Abstract:
A steel cord for reinforcing a rubber article such as tires, conveyor belts, and high pressure hoses, consists of a plurality of steel filaments twisted in the same twisting direction with the same twisting pitch. According to the invention, the filaments are spirally deformed so as substantially not to include any torsional stress or deformation component. This is obtained by means of preformers combined with the use of a tubular twisting machine, comprising filament bobbins mounted in the machine, and whose number corresponds to that of the filaments required for respective layers, including any core of the multiple layer steel cord. By eliminating torsional components acting upon the filaments, the fatigue resistance, adhesion stability and productivity of manufacturing are improved.
Abstract:
Metal cord (100, 200, 300, 510, 520, 530) for reinforcing elastomer products comprising n metal filaments (105, 210) twisted together in a cord twisting direction, all the metal filaments (105, 210) have the same cord twisting pitch, wherein at least one metal filament (210) has a cross section which deviates from a round cross section, e.g. a flat, oval or rectangular cross-section. The metal cord (100, 200, 300, 510, 520, 530) has high rubber penetration, high strength and high fatigue resistance. Also, the use of the metal cord (100, 200, 300, 510, 520, 530) for reinforcing rubber product, e.g. a breaker layer of a tire, is disclosed.
Abstract:
Provided are a steel cord for reinforcing rubber whose fatigue resistance is increased more than ever to enable achieving high durability that was not conventionally realized, and a pneumatic radial tire including the steel cord as a reinforcement member. In a steel cord for reinforcing rubber having a double-twist structure that includes a plurality of strands twisted together in the same direction with the same pitch and including a central structure and at least one outer layer, the central structure is composed of at least two strands being twisted around each other and each being composed of at least seven filaments being twisted together.; In a steel cord for reinforcing rubber including at least three core strands being twisted together and at least six sheath strands being twisted together around the core strands, the core strands and the sheath strands are twisted in the same direction.
Abstract:
Elevator coated ropes or belts are disclosed. The coated rope or belt may include at least one cord and a jacket retaining the at least one cord. The cord may include a plurality of filaments. The filaments are free of second-order helical structure. In a first embodiment, the filaments includes at least one inner filament and a plurality of outer filaments surrounding the at least one inner filament. The outer filaments are bunched together by forming a first- order helical structure through the length of the cord. In a second general embodiment, the filaments are free of both first- and second-order helical structures. The filaments are bunched together by a restraining loop or adhesive at one or more locations along the length of the cord. Methods of making the tension cord are also disclosed.