阅读说明：本技术 一种履带式起重用钢丝绳绳芯及其制作方法 (Steel wire rope core for crawler crane and manufacturing method thereof ) 是由 伍乐乐 杨岳民 高正凯 于 2021-07-30 设计创作，主要内容包括：本发明提供一种履带式起重用钢丝绳绳芯及其制作方法,该绳芯由预定数量的钢丝包捻3～4根大股捻制而成,每根所述大股由多根小股捻制而成,每根小股由多根绳芯复合丝捻制而成,所述小股和所述绳芯外分别包覆有内保护层和外保护层；所述绳芯复合丝为合成纤维与尼龙绳捻制而成；所述合成纤维为高分子量聚乙烯纤维和纳米复合金属氧化物-聚醚胺复合纤维捻制而成；所述内保护层的原料以质量计包括：聚醚砜、双酚A型环氧树脂、聚氨酯、纳米石墨烯、1～5份固化剂、消泡剂以及增韧纤维。绳芯经过复合材料制备、钢丝制备、绳芯复合丝制备、捻小股、内保护层形成、大股捻制、绳芯捻制及外保护层形成步骤制得,其具有优良的柔性、抗拉抗压性,结构与性能稳定,实用性高。(The invention provides a crawler-type hoisting steel wire rope core and a manufacturing method thereof, wherein the rope core is formed by twisting 3-4 large strands in a wrapping manner by a preset number of steel wires, each large strand is formed by twisting a plurality of small strands, each small strand is formed by twisting a plurality of rope core composite wires, and the small strands and the rope core are respectively coated with an inner protective layer and an outer protective layer; the rope core composite filament is formed by twisting synthetic fibers and nylon ropes; the synthetic fiber is formed by twisting high molecular weight polyethylene fiber and nano composite metal oxide-polyether amine composite fiber; the raw materials of the inner protective layer comprise by mass: polyether sulfone, bisphenol A epoxy resin, polyurethane, nano graphene, 1-5 parts of a curing agent, a defoaming agent and toughening fibers. The rope core is prepared by the steps of preparing a composite material, preparing a steel wire, preparing rope core composite wires, twisting small strands, forming an inner protective layer, twisting large strands, twisting the rope core and forming an outer protective layer, and has excellent flexibility, tensile and compressive resistance, stable structure and performance and high practicability.)

1. The steel wire rope core for the crawler-type crane is characterized in that the rope core is formed by twisting 3-4 large strands of a preset number of steel wires in a wrapping manner, each large strand is formed by twisting a plurality of small strands, each small strand is formed by twisting a plurality of rope core composite wires, and the small strands and the rope core are respectively coated with an inner protective layer and an outer protective layer;

the rope core composite filament is formed by twisting synthetic fibers and nylon ropes;

the synthetic fiber is formed by twisting high molecular weight polyethylene fiber and nano composite metal oxide-polyether amine composite fiber;

the raw materials of the inner protective layer comprise by mass: 2-6 parts of polyether sulfone, 30-40 parts of bisphenol A epoxy resin, 10-20 parts of polyurethane, 15-25 parts of nano graphene, 1-5 parts of curing agent, 1-5 parts of defoaming agent and 15-25 parts of toughening fiber.

2. The crawler-type steel wire rope core for hoisting according to claim 1, wherein the outer protective layer comprises the following components in parts by mass: 20-25 parts of Al, 6-9 parts of Mg, 15-25 parts of polyurethane, 0.5-1 part of Nb, 0.1-0.2 part of Ti, 0.1-0.15 part of V, 0.3-0.65 part of rare earth and 39-58 parts of zinc.

3. The crawler-type steel wire rope core for hoisting according to claim 2, wherein the rope core composite wires are filled between the large strands.

4. A crawler-type steel cord for hoisting according to claim 1, wherein said large strand and said small strand are in line contact with each other.

5. A method for manufacturing a steel wire rope core for a crawler crane is characterized by comprising the following steps:

step 1, preparing a composite material: uniformly mixing one tenth of the polyurethane nano graphene according to the formula amount with the polyurethane according to the formula amount twice to obtain a first mixture, uniformly mixing the bisphenol A epoxy resin, polyether sulfone, toughening fibers and the rest nano graphene according to the formula amount three times to obtain a second mixture, mixing the first mixture with the second mixture, adding the curing agent and the defoaming agent according to the formula amount, and uniformly mixing to obtain an inner protective layer composite material; preparing an outer protective layer composite melt according to the formula amount;

step 2, selecting high-carbon steel to perform wire coiling, drawing and annealing to obtain a steel wire;

step 3, preparing rope core composite yarns: preparing composite nanometer metal oxide-polyether amine fiber, twisting with high molecular weight polyethylene fiber to obtain synthetic fiber, and twisting with nylon rope to obtain composite rope core yarn

Step 4, twisting small strands: twisting a predetermined number of the rope core composite filaments to form small strands;

and 5, forming an inner protection layer: coating the inner protection layer composite material obtained in the step 1 on the small strands in the forms of extrusion coating, spraying, soaking and drawing or machine brushing to form an inner protection layer;

step 6, large strand twisting: forming a large strand using a predetermined number of small strands;

step 7, twisting rope cores: twisting a predetermined number of steel wires, large strands and rope core composite wires in a manner of twisting the large strands with the steel wires and twisting the rope core composite wires with the large strands to obtain a rope core;

and 8, forming an outer protective layer: and (3) hot-dip coating the rope core on the outer protective layer alloy melt obtained in the step (1) to form an outer protective layer on the surface of the steel wire, so as to obtain the crawler-type hoisting steel wire rope core.

6. The method for manufacturing a steel cord for crawler-type crane according to claim 5, wherein the preparation operation of the composite melt of the outer protective layer comprises:

step 1.1, preparing Al-Nb, Al-V and Al-Ti intermediate alloys;

step 1.2, mixing zinc ingots, Al-Nb, Al-V and Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding Al-Mg alloy, rare earth and polyurethane, and melting to obtain an alloy melt.

7. The method for manufacturing the steel wire rope core for the crawler-type crane according to claim 5, wherein the steel wire is obtained after three times of drawing and annealing in the step 2, the annealing temperature is 800-.

8. The method for manufacturing the steel wire rope core for the crawler-type crane according to claim 5, wherein the twisting directions in the steps 3, 4, 6 and 7 are the same.

9. The method for manufacturing the steel wire rope core for the crawler-type crane according to claim 5, wherein the method for preparing the nanocomposite metal oxide-polyether amine composite fiber in the step 3 is as follows:

step 3.1, preparing metal hydroxide by a coprecipitation method, and calcining at 550 +/-20 ℃ to obtain a corresponding nano composite metal oxide;

and 3.2, carrying out surface modification on the nano composite metal oxide by using a coupling agent, and then mixing with polyether amine for granulation and melt spinning to prepare the nano composite metal oxide-polyether amine composite fiber.

10. The method for manufacturing the steel wire rope core for the crawler-type crane according to claim 9, wherein the nano composite metal oxide is any one of aluminum oxide, zinc-aluminum oxide and zinc-magnesium oxide.

Technical Field

The invention relates to the field of steel wire ropes, in particular to a steel wire rope core for a crawler crane and a manufacturing method thereof.

Background

The steel wire rope is a spiral steel wire bundle formed by twisting steel wires with mechanical properties and geometric dimensions meeting requirements according to a certain rule, and has the advantages of high strength, light dead weight, stable work, difficulty in sudden breaking of the whole steel wire rope and reliable work.

The steel wire rope is mainly used on hoisting machinery, the existing crawler-type hoisting steel wire rope has defects in the aspects of flexibility, breaking tension, extrusion resistance, stress and the like, and is poor in working performance, in addition, the existing hoisting machinery steel wire rope is not subjected to any anti-corrosion performance treatment, abrasion and corrosion become one of main reasons of steel wire rope damage, a plurality of corrosion pits are formed on the surface and gradually deepen to become profitable concentration points and the root source of fatigue cracks, meanwhile, the bearing capacity of the steel wire rope is reduced, and the performance stability and the use of the steel wire rope are influenced.

The rope core of the steel wire rope is positioned in the center of the steel wire rope and plays a supporting role in the steel wire rope, the crawler-type steel wire rope can be subjected to larger pulling force, extrusion, friction, corrosion and the like in the using process, the rope core of the crawler-type steel wire rope is used as an integral supporting core, and the rope core of the crawler-type steel wire rope needs to have good flexibility, breaking pulling force, extrusion resistance, stress, corrosion resistance and friction resistance, but the existing crawler-type steel wire rope and the rope core of the crawler-type steel wire rope are easy to break, wear, corrode, extrude and deform and the like, and the performance and the use feeling are poor.

Disclosure of Invention

The invention aims to provide a crawler-type hoisting steel wire rope core with reasonable structure and material compatibility and a manufacturing method thereof, which improve the flexibility, breaking tension, extrusion resistance, friction resistance and corrosion resistance of the rope core, play a good supporting effect in a crawler-type steel wire rope and prolong the service life of the crawler-type steel wire rope.

In order to achieve the purpose, the invention provides a crawler-type hoisting steel wire rope core, which is formed by twisting 3-4 large strands in a wrapping manner by a preset number of steel wires, wherein each large strand is formed by twisting a plurality of small strands, each small strand is formed by twisting a plurality of rope core composite wires, and the small strands and the rope core are respectively coated with an inner protective layer and an outer protective layer; the rope core composite filament is formed by twisting synthetic fibers and nylon ropes; the synthetic fiber is formed by twisting high molecular weight polyethylene fiber and nano composite metal oxide-polyether amine composite fiber; the raw materials of the inner protective layer comprise by mass: 2-6 parts of polyether sulfone, 30-40 parts of bisphenol A epoxy resin, 10-20 parts of polyurethane, 15-25 parts of nano graphene, 1-5 parts of curing agent, 1-5 parts of defoaming agent and 15-25 parts of toughening fiber.

Further preferably, the outer protection layer contains the following components in parts by mass: 20-25 parts of Al, 6-9 parts of Mg, 15-25 parts of polyurethane, 0.5-1 part of Nb, 0.1-0.2 part of Ti, 0.1-0.15 part of V, 0.3-0.65 part of rare earth and 39-58 parts of zinc.

Preferably, the rope core composite yarn is filled between the large strands.

Further preferably, the cord core composite filaments of the large strand and the small strand are in line contact.

The invention also provides a manufacturing method of the steel wire rope core for the crawler crane, which comprises the following steps:

step 1, preparing a composite material: uniformly mixing one tenth of the polyurethane nano graphene according to the formula amount with the polyurethane according to the formula amount twice to obtain a first mixture, uniformly mixing the bisphenol A epoxy resin, polyether sulfone, toughening fibers and the rest nano graphene according to the formula amount three times to obtain a second mixture, mixing the first mixture with the second mixture, adding the curing agent and the defoaming agent according to the formula amount, and uniformly mixing to obtain an inner protective layer composite material; preparing an outer protective layer composite melt according to the formula amount;

step 2, selecting high-carbon steel to perform wire coiling, drawing and annealing to obtain a steel wire;

step 3, preparing rope core composite yarns: preparing composite nanometer metal oxide-polyether amine fiber, twisting with high molecular weight polyethylene fiber to obtain synthetic fiber, and twisting with nylon rope to obtain composite rope core yarn

Step 4, twisting small strands: twisting a predetermined number of the rope core composite filaments to form small strands;

and 5, forming an inner protection layer: coating the inner protection layer composite material obtained in the step 1 on the small strands in the forms of extrusion coating, spraying, soaking and drawing or machine brushing to form an inner protection layer;

step 6, large strand twisting: forming a large strand using a predetermined number of small strands;

step 7, twisting rope cores: twisting a predetermined number of steel wires, large strands and rope core composite wires in a manner of twisting the large strands with the steel wires and twisting the rope core composite wires with the large strands to obtain a rope core;

and 8, forming an outer protective layer: and (3) hot-dip coating the rope core on the outer protective layer alloy melt obtained in the step (1) to form an outer protective layer on the surface of the steel wire, so as to obtain the crawler-type hoisting steel wire rope core.

Further preferably, the preparation operation of the outer protective layer composite melt is as follows:

step 1.1, preparing Al-Nb, Al-V and Al-Ti intermediate alloys;

step 1.2, mixing zinc ingots, Al-Nb, Al-V and Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding Al-Mg alloy, rare earth and polyurethane, and melting to obtain an alloy melt. .

Further preferably, the steel wire is obtained after three times of drawing and annealing in the step 2, the annealing temperature is 800- & ltwb2- & gt 1300 ℃, and the annealing time is 20-45 min.

Further preferably, the twisting directions in step 3, step 4, step 6 and step 7 are the same.

Further preferably, the preparation method of the nanocomposite metal oxide-polyetheramine composite fiber in the step 3 is as follows:

step 3.1, preparing metal hydroxide by a coprecipitation method, and calcining at 550 +/-20 ℃ to obtain a corresponding nano composite metal oxide;

and 3.2, carrying out surface modification on the nano composite metal oxide by using a coupling agent, and then mixing with polyether amine for granulation and melt spinning to prepare the nano composite metal oxide-polyether amine composite fiber.

More preferably, the nanocomposite metal oxide is any one of a maillard oxide, a zinc aluminum oxide, and a zinc magnesium oxide.

The invention has the following beneficial effects: the invention provides a steel wire rope core for crawler-type hoisting, which is characterized in that synthetic fibers twisted by high molecular weight polyethylene fibers and nano composite metal oxide-polyether amine composite fibers are twisted with a nylon rope to form rope core composite wires, the rope core composite wires are twisted to form small strands, the small strands are twisted to form large strands, the steel wires are wrapped and twisted to form rope cores, an inner protective layer is formed outside the small strands by composite materials, and an outer protective layer is formed outside the rope cores by composite alloy materials.

The inner protection layer comprises raw materials of polyether sulfone, bisphenol A epoxy resin, polyurethane, toughening fibers, nano graphene, a curing agent and a defoaming agent by mass, a polyether sulfone toughening epoxy resin system is taken as a main body, dispersed phase polyether sulfone is unplanned deformation particles and is dispersed in the bisphenol A epoxy resin, a semi-interpenetrating network is formed in the curing process, and polyether sulfone particles dispersed under pressure can cause certain deformation, so that the toughness of the bisphenol A epoxy resin can be greatly improved, the excellent chemical corrosion resistance, mechanical strength and electrical insulation of the bisphenol A epoxy resin are not reduced, and the surface and the rope core of the obtained steel wire rope have excellent chemical corrosion resistance, mechanical strength, toughness and electrical insulation. The nano-graphene and the toughening fiber are added into the system, the nano-graphene is arranged on the surface of the fiber in a monomolecular manner under the adsorption action of the toughening fiber to form a structural fiber with firm binding force, forming a net-shaped connecting structure with a polyether sulfone toughened epoxy resin system, thereby enhancing the mechanical property and stability of the system, simultaneously reinforcing the fibers, has retarding effect on crack propagation, greatly improves the self-healing capability of the surface cracks of the rope core and the steel wire rope, enhances the elastic recovery, reduces the problem of the surface cracks of the rope core and the steel wire rope, thereby delaying the aging and the damage of the steel wire rope, improving the tensile strength, the fatigue resistance and the wear resistance of the steel wire rope, having stable performance and high practicability, and simultaneously, the nano graphene modified polyurethane, the 'nano effect' can strengthen the interface acting force between the nano factor and the polyurethane and improve the tensile strength and the elongation at break of the modified polyurethane. The existence of the foaming agent can reduce the foaming rate of the solution, avoid the formation of vacuoles in the obtained inner protective layer and ensure the performance of the inner protective layer. The curing agent improves the curing rate of the composite material, accelerates the curing speed, and improves the production efficiency and the product strength.

The raw materials of the outer protective layer comprise Al, Mg, polyurethane, Nb, Ti, V and rare earth in a certain content ratio and 39-58 parts of zinc by mass, elements are matched with each other through component and content control to form solid solution strengthening, fine grain strengthening and dispersion strengthening effects, the mechanical property of the outer protective layer is improved, the corrosion resistance of the outer protective layer is further improved by adding the rare earth elements, and the flexibility, the strength, the tear resistance and the wear resistance of the outer protective layer are improved by adding the polyurethane.

The small strands are coated with the inner protective layer, so that the corrosion resistance, the wear resistance, the breaking force and the extrusion resistance of the rope core can be improved, the abrasion of the composite wires of the rope core among the small strands can be reduced, and the service lives of the rope core and the steel wire rope can be prolonged. The outer protective layer is coated outside the rope core, so that the mechanical property and the chemical property of the cable core are improved, the structure of the rope core is compact and stable, the rotation resistance performance is good, and the performance stability of the steel wire rope is improved.

The rope core composite wires are filled between the large strands, and the wires are in line contact with the wires, and the strands are in line contact with the strands, so that a relatively full structure is formed inside the steel wire rope, and the mechanical property and breaking force of the steel wire rope are improved.

According to the manufacturing method of the steel wire rope core for the crawler-type crane, provided by the invention, the bisphenol A type epoxy resin, the polyether sulfone, the polyurethane, the toughening fibers and the nano graphene are mixed for three times, so that the bisphenol A type epoxy resin, the polyether sulfone, the polyurethane, the toughening fibers and the nano graphene are fully and uniformly mixed to form a good net-shaped connection structure, and a solid foundation is laid for subsequently manufacturing the steel wire rope core with excellent performance.

Drawings

Fig. 1 is a schematic structural view of a rope core of a crawler-type hoisting steel wire rope provided by the invention.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the embodiment provides a crawler-type steel wire rope core for hoisting, the rope core is formed by twisting 3-4 large strands of a predetermined number of steel wires 1 in a wrapping manner, each large strand is formed by twisting a plurality of small strands, each small strand is formed by twisting a plurality of rope core composite wires 2, and the rope core composite wires 2 are filled between the large strands and the large strands. The small strands and the rope core are respectively coated with an inner protective layer 3 and an outer protective layer 4; the rope core composite filament 2 is formed by twisting synthetic fibers and nylon ropes; the synthetic fiber is formed by twisting high molecular weight polyethylene fiber and nano composite metal oxide-polyether amine composite fiber, metal hydroxide is prepared by a coprecipitation method, corresponding nano composite metal oxide is obtained after calcination is carried out at 550 +/-20 ℃, and then the nano composite metal oxide is subjected to surface modification by a coupling agent, and is mixed with polyether amine for granulation and melt spinning to prepare the nano composite metal oxide-polyether amine composite fiber.

The raw materials of the inner protective layer 3 include by mass: 2 parts of polyether sulfone, 35 parts of bisphenol A epoxy resin, 17 parts of polyurethane, 17 parts of nano graphene, 2 parts of a curing agent, 2 parts of a defoaming agent and 17 parts of toughened fibers.

The outer protection layer 4 comprises the following components in parts by mass: 22 parts of Al, 7 parts of Mg, 15 parts of polyurethane, 0.5 part of Nb, 0.11 part of Ti, 0.13 part of V, 0.37 part of rare earth and 39 parts of zinc.

The large strand and the small strand of the rope core composite wire 2 are in line contact, when the wires are crossed to form point contact, the contact stress is very high during working, the wire is easy to wear and break, and the rope breaking tension is large during line contact, so that the wire is not easy to wear and break.

The manufacturing method of the steel wire rope core for the crawler crane comprises the following steps:

step 1, preparing a composite material: uniformly mixing one tenth of the polyurethane nano graphene according to the formula amount with the polyurethane according to the formula amount twice to obtain a first mixture, uniformly mixing the bisphenol A epoxy resin, polyether sulfone, toughening fibers and the rest nano graphene according to the formula amount three times to obtain a second mixture, mixing the first mixture with the second mixture, adding the curing agent and the defoaming agent according to the formula amount, and uniformly mixing to obtain the inner protective layer 3 composite material. And preparing Al-Nb, Al-V and Al-Ti intermediate alloys, mixing zinc ingots, the Al-Nb, the Al-V and the Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding the Al-Mg alloy, rare earth and polyurethane, and melting to obtain the composite alloy melt.

2, selecting high-carbon steel to perform wire coiling, drawing for three times and annealing for three times to obtain a steel wire 1, wherein the annealing temperature is 800-1300 ℃, and the annealing time is 20-45 min;

step 3, preparing the rope core composite yarn 2: preparing composite nanometer metal oxide-polyether amine fiber, twisting with high molecular weight polyethylene fiber to obtain synthetic fiber, and twisting with nylon rope to obtain rope core composite filament 2

Step 4, twisting small strands: twisting a predetermined number of the rope core composite filaments 2 to form small strands;

and step 5, forming an inner protection layer 3: coating the composite material of the inner protection layer 3 obtained in the step (1) on a small strand in the forms of extrusion coating, spraying, soaking and drawing or machine brushing to form the inner protection layer 3;

step 6, large strand twisting: forming a large strand using a predetermined number of small strands;

step 7, twisting rope cores: twisting a predetermined number of steel wires 1, large strands and rope core composite wires 2 in a manner that the steel wires 1 wrap and twist the large strands and the large strands wrap and twist the rope core composite wires 2 to obtain rope cores;

and 8, forming an outer protection layer 4: and (3) hot-dip coating the alloy melt of the outer protection layer 4 obtained in the step (1) to form the outer protection layer 4 on the surface of the steel wire 1, so as to obtain the crawler-type hoisting steel wire rope core.

Further preferably, the twisting directions in step 3, step 4, step 6 and step 7 are the same.

More preferably, the nanocomposite metal oxide is any one of a maillard oxide, a zinc aluminum oxide, and a zinc magnesium oxide.

Example 2

The difference from example 1 is that the raw material of the inner protective layer 3 includes, by mass: 3 parts of polyether sulfone, 32 parts of bisphenol A epoxy resin, 10 parts of polyurethane, 16 parts of nano graphene, 1 part of curing agent, 1 part of defoaming agent and 13 parts of toughening fiber.

The outer protection layer 4 comprises the following components in parts by mass: 20 parts of Al, 7.5 parts of Mg, 17 parts of polyurethane, 0.7 part of Nb, 0.13 part of Ti, 0.11 part of V, 0.46 part of rare earth and 45 parts of zinc.

Example 3

The difference from example 1 is that the raw material of the inner protective layer 3 includes, by mass: 4 parts of polyether sulfone, 38 parts of bisphenol A epoxy resin, 13 parts of polyurethane, 22 parts of nano graphene, 4 parts of a curing agent, 4 parts of a defoaming agent and 15 parts of toughened fibers.

The outer protection layer 4 comprises the following components in parts by mass: 21 parts of Al, 8 parts of Mg, 20 parts of polyurethane, 0.8 part of Nb, 0.15 part of Ti, 0.14 part of V, 0.3 part of rare earth and 50 parts of zinc.

Example 4

The difference from example 1 is that the raw material of the inner protective layer 3 includes, by mass: 5 parts of polyether sulfone, 30 parts of bisphenol A epoxy resin, 20 parts of polyurethane, 20 parts of nano graphene, 3 parts of a curing agent, 3 parts of a defoaming agent and 19 parts of toughened fibers.

The outer protection layer 4 comprises the following components in parts by mass: 25 parts of Al, 6 parts of Mg, 25 parts of polyurethane, 0.6 part of Nb, 0.17 part of Ti, 0.12 part of V, 0.55 part of rare earth and 58 parts of zinc.

Example 5

The difference from example 1 is that the raw material of the inner protective layer 3 includes, by mass: 6 parts of polyether sulfone, 40 parts of bisphenol A epoxy resin, 15 parts of polyurethane, 24 parts of nano graphene, 5 parts of a curing agent, 5 parts of a defoaming agent and 11 parts of toughened fibers.

The outer protection layer 4 comprises the following components in parts by mass: 24 parts of Al, 9 parts of Mg, 23 parts of polyurethane, 1 part of Nb, 0.2 part of Ti, 0.15 part of V, 0.65 part of rare earth and 53 parts of zinc.

The performance of the steel wire rope core for the crawler-type crane obtained in the embodiments 1 to 5 is shown in the following table 1; wherein, after bending resistance is 500 ten thousand times, the rope core composite filament 2 of the rope core is disassembled and broken by percentage; corrosion resistance is to carry out neutral salt spray experiment, each sample is suspended and placed, and spraying is continuously carried out, the sodium chloride content in the salt water is 5%, the pH value is about 6.8-7.2, the temperature in the salt spray equipment is (35 Sc 1) DEG C, and the time of red rust appears.

TABLE 1

The above table shows that the crawler-type hoisting steel wire rope core provided by the invention has poor water absorption, the moisture regain is less than 0.2%, the tensile strength and the breaking tension are high, the bending resistance and the wear resistance are good, after 500 ten thousand bending, the rope core composite wire 2 of the rope core is not broken by more than 10% and the corrosion resistance is good.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.