Abstract:
La présente invention concerne des câbles hybrides à couches dont certains sont utilisables pour renforcer au moins une nappe sommet de protection de pneumatiques poids-lourd ou génie civil, et d'autres pour renforcer des bourrelets de pneumatique pour véhicules légers à moteur, tels que des motocyclettes. L'invention concerne également un tissu composite utilisable comme nappe de sommet de protection de tels pneumatiques poids-lourd ou génie civil, une tringle destinée à renforcer ces bourrelets de pneumatique et les pneumatiques précités. Un câble hybride à couches (C) selon l'invention comporte une couche interne (C i ) non métallique et une couche externe (C e ) insaturée comportant des torons (T) qui sont chacun au moins en partie métalliques et qui sont enroulés en hélice sur ladite couche interne, et ce câble présente un allongement relatif à la rupture At, mesuré en traction selon la norme ISO 6892 de 1984, qui est supérieur à 7 %. Selon un autre aspect de l'invention, cette couche interne est constituée d'au moins un matériau présentant un allongement relatif à la rupture Ar à 20° C qui est supérieur à 6 %.
Abstract:
Ein flexibles, auf- und abwickelbares Zugorgan (38), insbesondere für Personen- und/oder Warenlifte umfasst wenigstens ein Litzenseil (16) aus einem zugfesten Material. Die Kernlitze (124) jedes Litzenseils (16) ist von einer flexiblen thermoplastischen Kunststoffschicht (126) umhüllt. Die abgewickelten Litzenseile (16) zur Verbesserung der Haftung der Kunststoffummantelung werden entfettet und/oder vorbehandelt, auf eine Temperatur von etwa ± 20°C der Schmelztemperatur des die Kernlitze (124) umhüllenden, flexiblen thermoplastischen Kunststoffs vorgewärmt und im Extruder (32) mit dem verflüssigten Kunststoff (86) ummantelt.
Abstract:
A steel cord comprises more than one steel filament (10). At least some of the steel filaments have a zinc iron alloy layer (14) partially covered with a zinc cover (16). The zinc cover is only present in valleys formed in the zinc-iron alloy layer. The processability and adhesion level in rubber products of the stell cord are increased.
Abstract:
A rope (40) comprising a plurality of bundle groups (41), each of said bundle groups having a periphery and comprising a plurality of high strength fibers, at least one low coefficient of friction fiber (42) disposed around at least a portion of the periphery of at least one of the bundle groups.
Abstract:
The invention relates to a flexible traction organ (38) that can be wound and unwound, in particular for passenger and/or goods lifts, said organ comprising at least one stranded cable (16) consisting of a tensile resistant material. The core strand (124) of each stranded cable (16) is surrounded by a flexible thermoplastic plastic layer (126). A production line (10) for embedding several stranded cables (16) in a flexible thermoplastic plastic (39) comprises a respective reel (14) for unwinding the stranded cable (16), a device (24) for accurately aligning the stranded cable (16), a heating element (26, 28, 30) for pre-heating the stranded cable (16), at least one extruder (32) for co-extruding the stranded cable (16) in a flexible plastic sheathing, a cooling vat (42), a reel storage unit (52), a cutting unit (66) and a reserve reel (18). The extruder (32), a wire guide (74) and at least one die (76) can be adjusted individually, conjointly and in relation to one another on a plane (P) that runs at an angle to the cable plane (E). The unwound stranded cables (16) are degreased and/or pre-treated to improve the adhesion of the plastic sheathing, are pre-heated to a temperature of approximately ± 20 °C in relation to the melting temperature of the flexible, thermoplastic plastic that surrounds the core strand (124) and are sheathed with liquefied plastic (86) in the extruder (32).
Abstract:
A pneumatic tyre comprises a cord-reinforced layer (10) such as carcass (6), belt (7), bead reinforcing layer which is made of metallic cords, each metallic cord being made up of six to twelve metallic filaments (F) whose diameter (d) is in a range of from 0.15 to 0.45 mm, the metallic filaments (F) including waved filaments (FA) and unwaved filaments (FB), each waved filament (FA) being two-dimensionally waved at a wave pitch (PW) and wave height (h) before twisted, the wave pitch (PW) is in a range of from 5.0 to 35.0 times the diameter (d) of the filament, and the wave height (h) is in a range of from 0.2 to 4.0 times the diameter (d) of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments (FA) are each subjected to a certain rotation around its axial.
Abstract:
A pneumatic tyre comprises a cord-reinforced layer (10) such as carcass (6), belt (7), bead reinforcing layer which is made of metallic cords, each metallic cord being made up of six to twelve metallic filaments (F) whose diameter (d) is in a range of from 0.15 to 0.45 mm, the metallic filaments (F) including waved filaments (FA) and unwaved filaments (FB), each waved filament (FA) being two-dimensionally waved at a wave pitch (PW) and wave height (h) before twisted, the wave pitch (PW) is in a range of from 5.0 to 35.0 times the diameter (d) of the filament, and the wave height (h) is in a range of from 0.2 to 4.0 times the diameter (d) of the filament, and the metallic filaments are twisted together into the cord at a twist pitch of from 10 to 40 mm so that the two-dimensionally waved filaments (FA) are each subjected to a certain rotation around its axial.
Abstract:
A steel cord for the reinforcement of rubber articles is formed by twisting 4-5 strands, each strand (1) being formed by twisting a sheath (3) of 4-5 steel filaments around a core (2) of a single steel filament, wherein a ratio of diameter d S of the steel filament constituting the sheath to diameter d C of the steel filament constituting the core is within a range of 1.00 - 1.75, and a twisting direction of the sheath in the strand is the same as a twisting direction of the strand in the cord, and a twisting angle a of the sheath in the strand with respect to an axis of the cord, as calculated by a certain defined equation, is within a range of 30 - 52°.