Abstract:
A steel cord (10) for reinforcing rubber product comprises at least one core strand (12) and outer strands (14), the outer strands (14) are helically twisted around at least one core strand (12). Each of the strands (12, 14) comprises core steel filaments (16, 20) with the number of m and outer steel filaments with the number of n. The diameter of the core steel filaments in the core strand is Dcc, the diameter of the outer steel filaments in the core strand is Doc, the diameter of the core steel filament in the outer strand is Dco, and the diameter of the outer steel filament in the outer strand is Doo. The ratio of Dcc/Doc is not less than 1.04, the ratio of Dco/Doo is not less than 1.03, and the ratio of Doc/Dco is not less than 1. The core steel filaments and outer steel filaments are polygonally preformed before being twisted into strands. The steel cord is used for reinforcing off-the-road tire.
Abstract:
Metal cord with three layers (C1+C2+C3) of 3+M+N construction, rubberized in situ, comprising a first layer or central layer (C1) comprised of three wires of diameter d1 assembled in a helix at a pitch p1, around which central layer there are wound in a helix at a pitch p2, in a second layer (C2), M wires of diameter d2, around which second layer there are wound in a helix at a pitch p3, in a third layer (C3), N wires of diameter d3. The cord has the following characteristics (d1, d2, d3, p1, p2 and p3 being expressed in mm): 0.08≦d1≦0.50; 0.08≦d2≦0.50; 0.08≦d3≦0.50; 3
Abstract:
A rubber-cord complex having an improved wet heat adhesive property between a rubber and a cord comprising a drawn plated wire, and including a metal cord comprising a drawn plated wire prepared by providing a brass plated layer on the surface of an element wire and drawing the resulting plated wire, and a rubber vulcanized and bonded to the cord, wherein in a wet heat deterioration state of the drawn plated wire after being subjected to the vulcanization to bond the rubber thereto and further held under an atmosphere having a temperature of 50 to 100° C. and a humidity of 60 to 100% for one hour to 20 days, the average grain size of crystal grains present in the brass plated layer is not more than 50 nm, and the grain boundary of the crystal grains has a fractal dimension of 1.001 to 1.500.
Abstract:
High strength cables formed from strength members. The strength members are formed from bimetallic filament wires which may be encased within a jacket of polymeric material. The bimetallic filament wires wherein the filaments include a high strength core and a corrosion resistant alloy clad forming the outer layer of the filament. The strength members may be used individually, as a central strength member, or even layered around a central axially positioned component or strength member, to form a layer of strength members. Cables of the invention may be of any practical design, including monocables, coaxial cables, quadcables, heptacables, slickline cables, multi-line cables, suspension cables, and the like.
Abstract:
Cables used with wellbore devices to analyze geologic formations adjacent a wellbore are disclosed. The cables include one or more armor wires formed of a high strength core surrounded by a corrosion resistant alloy clad. The cables may be employed as a slickline or multiline cables, where the armor wire is used to convey and suspend loads, such as tools, in a wellbore. The cables may also be useful for providing wellbore related mechanical services, such as, jamming, fishing, and the like.
Abstract:
High strength cables formed from strength members. The strength members are formed from bimetallic filament wires which may be encased within a jacket of polymeric material. The bimetallic filament wires wherein the filaments include a high strength core and a corrosion resistant alloy clad forming the outer layer of the filament. The strength members may be used individually, as a central strength member, or even layered around a central axially positioned component or strength member, to form a layer of strength members. Cables of the invention may be of any practical design, including monocables, coaxial cables, quadcables, heptacables, slickline cables, multi-line cables, suspension cables, and the like.
Abstract:
Steel wire is coated with a metal layer such that the metal layer has a surface with roughnesses. A surface roughness Ra of above 0.25 μm is reached. Preferably, the roughnesses are randomly dispersed at the surface. The result is an improved visual aspect and an increased resistance against corrosion.
Abstract:
A (metal/rubber) composite comprising a rubber matrix reinforced with a metallic body adhering to the rubber matrix by means of an adhesive interphase; the rubber matrix is based on diene elastomer; the metal is a carbon steel, the carbon content of which is between 0.35% and 1.2%; to constitute the adhesive interphase, the carbon steel is coated with a metallic layer bearing aluminium oxides or hydroxides, which itself is covered by an organosilane film providing, as coupling agent, the bond between the aluminium oxides-hydroxides on one hand, and the rubber matrix on the other hand. The invention also relates to articles or semi-finished products made of rubber which are reinforced with or formed by such a composite, in particular tires.
Abstract:
A method of treating a metallic cord to improve its ability to adhere to rubber is disclosed. The method involves contacting the metallic cord with a naphthenic oil containing from 1 to 53 percent by weight of a soluble cobalt salt and thereby deposit from 0.002 to 0.7 grams of cobalt per kilogram of steel to the metallic cord.
Abstract:
In a composite of vulcanizable rubber or rubber-like composition with one or more metal reinforcement elements embedded therein, the metal reinforcement element is coated with a polymer or non-cured rubber composition compatible with and co-polymerizable, co-vulcanizable or crosslinkable with said vulcanizable ruber composition to be reinforced, and additionally bearing functional groups either covalently bonding to the metal surface of said reinforcement element or forming covalent bonds with the outward directed first functional groups of a mono- or multimolecular layer of a bifunctional adhesion promoter intercalated between said metal and said coating and bound to said metal by its second functional groups. A cured rubber or rubber-like product, for instance a pneumatic tire, is obtained by vulcanization of such a composite.