Abstract:
A hybrid steel cord and method of making such cord which includes, in contact with one or more carbon steel wire(s), at least one stainless steel wire whose microstructure contains less than 20% of martensite (% by volume). Articles made of plastic and/or rubber, in particular tire envelopes or the carcass reinforcement plies of such envelopes embodying such cords.
Abstract:
A synthetic plastic rope includes a selected number of first components having a relatively high elongation characteristic and second components whose elongation characteristic is considerably lower. In one form of the invention, the rope has a central core in which the first components are located, and a plurality of surrounding strands principally constituted of second components. In other forms, the rope does not have a core and there are a plurality of strands braided (plaited) or laid (twisted) together primarily consisting of the low elongation components, but having high elongation components distributed substantially symmetrically and which in the aggregate have substantially less mass than the low elongation components.
Abstract:
Disclosed is a needle-pass paper cord (200) made of paper. The paper cord is formed by means of weaving yarn (201) made of paper, and the yarn has a cross-section that is similar to a circle formed of a thread folded to a point.
Abstract:
A method for determining a state of an elevator system suspension traction apparatus having at least one electrically conductive cord with a first end and an opposite second end, the cord having a wave impedance. A signal generator is electrically connected to the cord first end and a terminating resistor having a first resistance value matched to the wave impedance of the cord is electrically connected to the cord second end. The method includes the steps: inputting an, in particular alternating, electrical excitation signal of the signal generator into the cord first end; at least one of measuring a reflection signal of the excitation signal at the cord first end, and measuring a transmitted signal of the excitation signal at the cord second end; and determining the state of the suspension traction apparatus by comparing the excitation signal with at least one of the reflection signal and the transmitted signal.
Abstract:
There are provided a rope which is excellent in a wear resistance and a bending resistance, and a manufacturing method of implementing the rope.A rope (1) including a yarn twisted by using a raw thread (5) of a polyethylene fiber (6) having an ultrahigh molecular weight and a strand (2) twisted by the yarn and subjected to steel-making through the strand (2), and a resin coating layer for protecting the rope (1) is formed on an external surface of the yarn, an external surface of the strand (2) or an external surface of the rope (1). A method of manufacturing the rope (1) includes a pretreating step I of removing an oil content contained in the rope (1) and performing an affinity enhancing treatment over a surface thereof and a resin coating step II of forming a resin coating layer for protecting the rope (1) on an external surface of the yarn, an external surface of the strand (2) or an external surface of the rope (1). The resin coating layer for protecting the rope (1) is formed. For this reason, impurities such as sand in the sea or the like is prevented from intruding into an inner part of the rope (1). Therefore, a life of the rope (1) can be enhanced.
Abstract:
A rope structure contains first and second sets of fibers. The first set of fibers is twisted together. The second set of fibers is twisted around the first set of fibers to form yarns. The first set of fibers is formed of a first material, the second set of fibers is formed of a second material, and elongation of the first set of fibers is different from elongation of the second set of fibers. Twists applied to the first and second fibers are such that loads on the rope structure are substantially evenly distributed across individual fibers. The yarns are combined to form strands in the form of a 3-strand rope. The strands are combined using a single braid process to form the rope structure defining a void space. The rope structure is formed such that lengths of fibers in the first and second sets are approximately the same.
Abstract:
The invention relates to a high strength fibers comprising a coating of cross-linked silicone polymer, and ropes made thereof. The fibers are preferably high performance polyethylene (HPPE) fibers. The coating comprising a cross-linked silicone polymer is made from a coating composition comprising a cross-linkable silicone polymer. The rope shows markedly improved service life performance in bending applications such as cyclic bend-over-sheave applications. The invention also relates to the use of a cross-linked silicone polymer in a rope for an improvement of bend fatigue resistance.
Abstract:
A steel cord having a 1×2 construction formed by twisting two wire strands together is used as a reinforcing layer of a pneumatic tire. The steel cord has a carbon content of from 0.60 to 0.75%, a strength in the tire of from 2,900 to 3,500 MPa, and a twisting angle of from 1.5 to 3.0°. Therefore, productivity can be enhanced while fatigue resistance of the steel cord used in the reinforcing layer is maintained. Additionally, fatigue resistance of the steel cord is further enhanced due to the average value of the forming factor of the steel cord of this tire being set to from 95 to 105% and the standard deviation σ being set to from 5 to 20%. As a result, tire durability can be enhanced.
Abstract:
A fiber cable for helicopter rescue winches includes a plurality of load-bearing synthetic-fiber strands braided with one another, at least one electrically conductive insert, and a wear indicator providing a visual check of a state of the fiber cable, where the load-bearing synthetic-fiber strands are encased in a radial direction by a friction-reducing stable fiber layer, an inner cable jacket, and outer cable jacket.