Abstract:
A telecommunication submarine cable of co-axial construction has a multistrand centre core imparting tensile strength to the cable, the core having adjacent layers of the core separated by a layer of soft metal.
Abstract:
The present invention provides structure of steel cord in heavy duty tires, in which the adhesive strength between filament and rubber, and penetrating property of rubber are improved by making the twist direction of core and strand different in the steel cord comprising core and strand filament, and by making the pitch or the twist period of core and strand different. In particular, this structure is applied to steel cord of 3+8*d(HT) which is used in heavy duty tires. In this application, twist direction of core filament is in the S direction and twist direction of strand filament is in the Z direction, and the ratio of the pitch of core filament (CP) and the pitch of strand filament (SP) is between 0.50 and 0.94.
Abstract:
A pneumatic tire has a bead core (12) formed by laminating three or more sheath layers (32) of spirally twisted sheath filaments (33) around a thick core wire (31) and making reverse the twisting direction of the sheath filaments in these sheath layers every sheath layer, in which the number of twisting pitches in the sheath filament (33b) of a second sheath layer (32b) viewed from the outermost side is made smaller than that in a sheath filament (33c,33d) of a sheath layer (32c,32d) located inward from the second sheath layer.
Abstract:
Un cable metallique comprend une pluralite de torons (4-12) torsades, chique toron metallique (4-12) etant recouvert d'une gaine (16) de caoutchouc ou d'un substitut du caoutchouc. Chaque toron (4-12) comprend une pluralite de fils metalliques (14) torsades ensemble d'au moins les fils exterieurs (14), le sens de tors de chaque toron (4-12) etant contraire au sens de tors d'au moins les fils exterieurs (14) de chaque toron (4-12) adjacent; le cable est recouvert d'une gaine externe (18) de caoutchouc ou d'un substitut du caoutchouc. De cette maniere, les fils metalliques (14) des torons adjacents (4-12) ne s'entrecroisent pas et la contrainte qu'ils subissent est ainsi diminuee.
Abstract:
A hybrid rope (40) or a hybrid strand (50) comprising a core element (42, 52), a first (44, 54) and a second (46, 56) metallic closed layer surrounding said core element (42, 52). The core element (42, 52) includes a bundle of synthetic yarns. The first metallic closed layer (44, 54) includes a plurality of first strands of wires helically twisted together with the core element (42, 52) in a first direction. The second metallic closed layer (46, 56) includes a plurality of second wires or strands helically twisted together with said core element (42, 52) and said first metallic closed layer (44, 54) in a second direction. The cross-sectional area of the core element (42, 52) is larger than the total cross-sectional area of the first (44, 54) and second (46, 56) metallic closed layers. A corresponding method of producing such a hybrid rope or hybrid strand is also disclosed.
Abstract:
Procédé de fabrication d'un câble métallique à deux couches (Ci, Ce), de construction M+N, comportant une couche interne (Ci) constituée de M fils de diamètre d 1 enroulés ensemble en hélice selon un pas p 1 , M variant de 2 à 4, et une couche externe (Ce) de N fils de diamètre d 2 enroulés ensemble en hélice selon un pas p 2 autour de la couche interne (Ci), ledit procédé comportant au moins les étapes suivantes opérées en ligne : - une étape d'assemblage par retordage des M fils d'âme, pour formation de la couche interne (Ci) en un point d'assemblage; - en aval dudit point d'assemblage des M fils d'âme, une étape de gainage de la couche interne (Ci) par une composition de caoutchouc diénique dite 'gomme de remplissage' à l'état cru; - une étape d'assemblage par retordage des N fils de la couche externe (Ce) autour de la couche interne (Ci) ainsi gainée; - une étape d'équilibrage final des torsions. Dispositif pour la mise en œuvre d'un tel procédé.
Abstract:
A steel cord (10) adapted for the reinforcement of elastomers comprises: a core steel filament (12) with a core steel filament diameter d c and coated with a polymer (14); six intermediate steel filaments (16) with an intermediate steel filament diameter d i smaller than or equal to the core steel filament diameter d c ; these intermediate steel filaments (16) are twisted around the core steel filament (12); ten or eleven outer steel filaments (18) with an outer steel filament diameter d o smaller than or equal to the intermediate steel filament diameter d I ; these outer steel filaments (18) are twisted around the intermediate steel filaments (16), the outer steel filaments (18) are preformed in order to allow rubber penetration inside the core (10). The core steel filament (12), the intermediate steel filaments (16) and the outer steel filaments (18) all have a tensile strength at least 2600 MPa. The cord (10) has an outer diameter D according to following formula: D ≤ d c + 2xd i + 2xd o + 0.1 wherein all diameters are expressed in millimeter (mm).
Abstract:
The present invention provides structure of steel cord in heavy duty tires, in which the adhesive strength between filament and rubber, and penetrating property of rubber are improved by making the twist direction of core and strand different in the steel cord comprising core and strand filament, and by making the pitch or the twist period of core and strand different. In particular, this structure is applied to steel cord of 3+8*d(HT) which is used in heavy duty tires. In this application, twist direction of core filament is in the S direction and twist direction of strand filament is in the Z direction, and the ratio of the pitch of core filament (CP) and the pitch of strand filament (SP) is between 0.50 and 0.94.