Abstract:
A steel cord used for reinforcing rubber product with an oval cross-section has a structure of m+n, while m is the number of core wires (26) and n is the number of the outer layer wires (22). The core wire (26) is untwisted while m is 1 or the core wires (26) are untwisted and aligned in parallel while m is between 2 and 4, and the outer layer wires (22) are twisted around said core wires (26). The core wires (26) are oval wires and the outer layer wires (22) are round wires. The wires (22, 26) in the steel cord have a carbon content not less than 0.60%.
Abstract:
Renfort composite (R-2) auto-adhérent par cuisson à une matrice de caoutchouc diénique, utilisable comme élément de renforcement d'un bandage pneumatique, comportant : - un ou plusieurs fïl(s) de renforcement (20), par exemple un câble en acier au carbone; recouvrant ledit fil ou lesdits fils, une première couche (21) d'un polymère thermoplastique dont la température de transition vitreuse est positive, par exemple un polyamide 6-6; recouvrant la première couche (21), une deuxième couche (22) comportant un élastomère thermoplastique styrénique insaturé fonctionnalisé, dont la température de transition vitreuse est négative, ledit élastomère étant porteur de groupes fonctionnels choisis parmi les groupes époxyde, carboxyle, anhydride ou ester d'acide, par exemple un élastomère SBS époxydé. Procédé de fabrication d'un tel renfort composite; article ou produit semi-fini en caoutchouc, notamment bandage pneumatique, incorporant un tel renfort composite.
Abstract:
An elongated steel element (12) with a martensite, tempered martensite, bainite or sorbite structure has a polymer coating (16) with a thickness lower than 20 μm immediately upon the elongated steel element (14). The friction coefficient and corrosion resistance are both improved by the polymer coating at a lower cost.
Abstract:
A rope (20, 30, 40, 50) comprising steel wires, at least one of said steel wires (10) being a double-coated steel wire, said double-coated steel wire being individually coated with a zinc or zinc alloy plating (14), said zinc or zinc alloy plating being further coated with an extruded material (16) selected from the group consisting of polyethylene terephtalate, polybutylene terephtalate, polyethylene naphtenate or any copolymer comprising polyethylene terephtalate, polybutylene terephtalate or polyethylene naphtenate. The rope (20, 30, 40, 50) has a good protection against corrosion and is particularly suitable for use as a fishing rope.
Abstract:
The invention concerns a hybrid steel cord comprising, in contact with one or several carbon steel wire(s), at least one stainless steel wire with its microstructure containing less than 20 % of martensite ( % in volume). The invention also concerns the use of at least one stainless steel wire in a steel cord comprising carbon steel wires, to improve by contact the fatigue-fretting-corrosion strength of theses carbon steel wires, and thereby the fatigue life of the steel cord itself. The invention further concerns cords as per the invention for reinforcing plastic and/or rubber articles and plastic and/or rubber articles reinforced with such cords, in particular tyre treads or body plies of such tyre treads.
Abstract:
The invention relates to a substrate for reinforcing elastomeric polymers whereby at least part of the substrate is made of steel, said part being covered by a layer of an alloy consisting of, apart from impurities, between 4.2 and 6.5 % weight of aluminium, possibly less than 0.1 % of at least one element stimulating the wetting ability of the liquid alloy to the substrate and the balance zinc.
Abstract in simplified Chinese:为了高耐久性优异并且具有半永久的防锈性能,而由经拉线处理及电镀处理而形成电镀层的股线构成芯线及侧线,并且在外周面进行用来形成合成树脂被膜的防锈处理而构成双重防锈PC钢绞线。捻绞的间距应均等且一定,该芯线及侧线是各别由下述(A)、(B)或(C)的线径的调整条件调整之后进行捻绞,且,使成为抗拉强度1850N/mm2以上;(A)芯线的径:4.42±0.05mm、侧线的径:4.25±0.05mm,(B)芯线的径:5.22±0.05mm、侧线的径:5.06±0.05mm,(C)芯线的径:5.40±0.05mm、侧线的径:5.25±0.05mm。
Abstract:
Composite reinforcer (R-2) self-adhesive, by curing, to a diene rubber matrix, which can be used as reinforcing element for a tire, comprising: one or more reinforcing thread(s) (20), for example a carbon steel cord; a first layer (21) of a thermoplastic polymer, the glass transition temperature of which is positive, for example, a polyamide 6,6, covering individually said thread or each thread or collectively several threads; a second layer (22) comprising a functionalized diene elastomer bearing functional groups selected from epoxide, carboxyl, acid anhydride and acid ester groups, for example, an epoxidized natural rubber, covering the first layer (21). Process for manufacturing such a composite reinforcer and rubber article or semi-finished product, especially a tire, incorporating such a composite reinforcer.
Abstract:
An elongated steel element adapted for the reinforcement of rubber products is covered with a ternary alloy or quaternary alloy coating of copper-M-zinc. M is one or two metals selected out of the group consisting of cobalt, nickel, tin, indium, manganese, iron, bismuth and molybdenum. The copper content inside the coating ranges from 58 weight percent to 75 weight percent. The content of the one or two metals inside said coating ranges from 0.5 weight percent to 10 weight percent. The remainder is zinc and unavoidable impurities. The one or two metals are present throughout the coating. Phosphorus is present on and/or in the coating in an amount of more than 1 and less than 4 milligram per square meter of the coating. The coating further comprises one or, ore compounds which complex with the copper in the coating to form an insoluble film on its surface. Good results are obtained for steam ageing and cured humidity adhesion. Furthermore, a corresponding method for manufacturing such an elongated steel element is disclosed.