RU2431708C2 - Ropes with higher wear resistance in multiple reeling onto pulley (versions), method of their making and usage - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: rope is made of high-strength fibres, preferably from a mix of high-strength polyethylene fibres with aramid fibres and/or fibres of ester liquid crystal copolymers. Fibres and/or the rope are coated with a composition containing a silicon resin functionalised with amines and a neutralised low-molecular polyethylene.

EFFECT: ropes have higher wear resistance in multiple reeling onto pulleys.

10 cl, 5 ex

Description

FIELD OF TECHNOLOGY

This invention relates to improvements in ropes, in particular high-strength synthetic ropes suitable for use on ships.

BACKGROUND

Synthetic fiber ropes are used in various fields, including various aspects of marine practice. One type of rope with exceptionally high properties is a rope of high modulus polyolefin fibers and / or yarn. It is also known that high strength fibers are long chain or high molecular weight fibers. These fibers and yarns are available, for example, under the trademark SPECTRA® by Honeywell International Inc. and are long-chain polyethylene fibers and yarn.

It has been suggested that ropes made of long chain polyethylene fibers be used on ships, see, for example, US Pat. Nos. 5,901,632 and 5,931,076.

In some applications on ships, long-chain polyethylene ropes are repeatedly wound around pulleys, blocks or masts. Some synthetic ropes, when repeatedly wound on pulleys, wear out prematurely, and this problem is especially relevant for synthetic ropes used on industrial marine vessels.

On many marine vessels, synthetic ropes continue to displace steel wire. As synthetic ropes are successively replaced by steel wire when pulled multiple times onto CBOS pulleys (CBOS), there is a need to increase the service life of synthetic ropes with improved performance. In particular, there is a need to increase the service life of ropes made from highly efficient polyolefin fibers and yarn.

A solution to the improved rope problem has previously been proposed, which is disclosed in US Pat. No. 6,94515. This patent describes a large diameter rope made from a mixture of long chain polyethylene fibers and liquid crystal polymer fibers. It would be desirable to improve the properties of such ropes.

It is advisable to create a rope from high-strength polyolefin fibers with increased wear resistance upon repeated winding on pulleys, etc., especially in conditions of high humidity, while maintaining other high qualities. It is desirable to create a rope suitable for use when moving heavy objects, for example, to the bottom or from the bottom of the sea.

SUMMARY OF THE INVENTION

According to the present invention, there is provided a rope with increased resistance to CBOS wear, consisting of high strength fibers, wherein the rope and / or fibers are coated with a composition of an amino group-containing silicone resin and a neutralized low molecular weight polyethylene.

In addition, the present invention provides a rope with increased resistance to CBOS wear, consisting of a mixture of high-strength polyethylene fibers and other high-strength fibers, which are not polyethylene fibers, the rope and / or fibers coated with a composition containing amino-functionalized silicone resin and neutralized low molecular weight polyethylene.

The invention also provides a rope with enhanced resistance to CBOS wear, consisting of a mixture of high-strength polyethylene fibers and other high-strength fibers, which include aramid fibers and / or fibers of liquid crystal ester copolymers, the rope and / or fibers coated with a composition containing silicone resin with functional amino groups and neutralized low molecular weight polyethylene.

Further, according to the present invention, a method is proposed for increasing the rope service life in CBOs, comprising manufacturing a rope from high strength fibers and applying a composition containing a silicone resin with functional amino groups and neutralized low molecular weight polyethylene onto the rope and / or the fibers of which this rope is made.

In addition, according to this invention, a method for moving and mounting heavy objects on the seabed and lifting from the seabed using a rope of synthetic fibers; the improvement includes the use of a rope of the required quality made of high-strength fibers, the rope and / or fibers being coated with a composition comprising an amino-functionalized silicone resin and a neutralized low molecular weight polyethylene.

It was unexpectedly found that if you coat high-strength fibers with a composition containing a silicone resin with functional amino groups and neutralized low molecular weight polyethylene and assemble it into a rope, or if a rope made of uncoated fibers is coated with such a composition, the CBOS service life of such a rope increases. It was also unexpectedly discovered that if in the manufacture of a rope high-strength fibers are mixed with other high-strength fibers and a composition containing amino-functionalized silicone resin and neutralized low molecular weight polyethylene is applied to the mixed fibers, or the rope made of such mixed fibers is coated with the specified composition, then CBOS - The service of such a rope is increasing.

DETAILED DESCRIPTION OF THE INVENTION

For the purposes of the present invention, the fiber is an elongated body, the length of which significantly exceeds its width and thickness. Accordingly, the term “fiber” includes a single-core thread, a multi-core thread, a tape, a strip, a bracket, and other forms of cut, chopped, or discrete fiber and the like. with a regular or irregular cross section. The term "fiber" includes many of any of the above forms or a combination thereof. Yarn is a continuous bundle of many fibers or threads. The fibers may also be in the form of a tape, strip, or fibrillated film or tape.

Cross sections of the fibers used in this invention can vary widely. They can be round, flat or elongated. Cross sections may be irregular in shape or have many protrusions, from which one or more regular or irregular protrusions extend from a linear or elongated fiber axis. It is preferred that the fibers have a substantially circular, flat or elongated cross section, and most preferably a substantially circular cross section.

As indicated above, ropes made of high modulus polyolefin fibers, such as long chain polyethylene fibers, and yarn made from them, have been proposed for use on ships. One such application is the movement and mooring of heavy objects on the seabed. Other applications include oil and gas exploration in other countries, oceanographic, seismic and other industrial surveys. The most preferred uses of the ropes of this invention include deep sea lifting and installation work.

The fibers used to make the rope are high strength. The term "high strength fibers" as used means fibers with a strength equal to or greater than about 7 g / d. Preferably, these fibers have an initial tensile modulus of at least about 150 g / d and a burst energy of at least about 8 J / g according to ASTM D2256. The terms “initial tensile modulus”, “tensile modulus” and “modulus” as used herein refer to the modulus of elasticity according to ASTM 2256 for yarn.

It is preferred that the high strength fibers have a strength equal to or greater than about 10 g / d, more preferably equal to or greater than about 16 g / d, even more preferably equal to or greater than about 22 g / d, and most preferably equal to or greater than about 28 g / d .

High-strength fibers for the manufacture of ropes can be used on their own or more preferably used in mixtures of two or more high-strength fibers of different chemical composition.

The high strength fibers used herein include highly oriented fibers of high molecular weight polyolefins, in particular high modulus polyethylene fibers and polypropylene fibers, aramid fibers, polybenzazole fibers such as polybenzoxazole (PBO) and polybenzothiazole (PBT) fibers, polyvinyl alcohol fibers, polyacrylate fibers fibers, fibers of ester liquid crystal copolymers, fiberglass, carbon fibers or fibers of basalt or other minerals, as well as polymer fibers in the form of rigid rods and their mixtures. Preferred high strength fibers used in this invention include polyolefin fibers, aramid fibers, ester liquid crystal copolymers fibers, and mixtures thereof. Most preferred are high molecular weight polyethylene fibers, aramid fibers and ester liquid crystal copolymers and mixtures thereof. Although yarn for ropes can be made from a mixture of two or more of these high-strength fibers, it is preferable for the manufacture of a rope to yarn from high-strength fibers of one type or two or more types of yarn from fibers of different types.

Preferred blends are mixtures of high strength polyethylene fibers and aramid fibers and mixtures of high strength fibers and ester liquid crystal copolymers, as well as mixtures of aramid fibers and ester liquid crystal copolymers.

Preferably, the fibers used in the manufacture of the rope contain long chain (also known as high molecular weight, high strength or high modulus) polyolefin fibers, in particular high modulus polyethylene fibers and polypropylene fibers.

US Pat. No. 4,457,985 generally discusses such high molecular weight polyethylene fibers and polypropylene fibers. In the case of polyethylene, suitable fibers have an average molecular weight of at least about 150,000, preferably about one million, and more preferably about two to five million. Such high molecular weight fibers can be spun in solution (see US Pat. No. 4,137,394 and US Pat. No. 4,356,138), or they can be in the form of a yarn spun from a solution to form a gel structure (see US Pat. No. 4,413,110, German Off No. 3004699 and UK patent No. 2051667), or polyethylene fibers can be obtained by winding and pulling (see US patent No. 5702657). As used herein, the term “polyethylene” means essentially linear polyethylene, which may contain a small number of branches or comonomers, not exceeding about 5 modifying units per 100 carbon atoms of the main chain, and which may also typically contain no more than about 50 wt.% Of one or more polymer additives, such as alkene-1 polymers, in particular low density polyethylene, polypropylene or polybutylene, copolymers containing monoolefins as primary monomers, oxidized by iolefiny fixed polyolefin copolymers and polyoxymethylenes, or low molecular weight additives such as antioxidants, lubricants, UV protective component, colorants, etc.

High-strength polyethylene fibers are available, for example, under the trademark "SPECTRA® Fibers and Yarns" from Honeywell International Inc. of Morristown, New Jersey, U.S.A

A variety of properties can be imparted to these fibers, depending on the preparation procedure, stretching coefficient and temperature, and other conditions. The strength of the polyethylene fibers is at least about 7 g / d, preferably at least about 15 g / d, more preferably at least about 20 g / d, even more preferably at least about 25 g / d and most preferably at least at least about 30 g / d. Similarly, it is preferable that the initial modulus of tensile elasticity of the fibers determined on the Instron strength testing device is at least about 300 g / d, more preferably at least about 500 g / d, even more preferably at least about 1000 g / d and most preferably at least about 1200 g / d. Such high values of the initial modulus of elasticity in tension and strength are usually obtained only when using methods of growth in solution or spinning from a gel. Many strands have a melting point higher than the melting point of the polymer from which it is derived. So, for example, samples of massive high molecular weight polyethylene with a molecular weight of about 150,000 and about one to two million usually melt at a temperature of 138 ° C. Highly oriented polyethylene yarns made from these materials have a melting point of about 7-13 ° C higher. Thus, a slight increase in the melting temperature reflects an increased ordering and orientation of the crystals in the filament compared to a bulk polymer.

It is preferable to use polyethylene containing less than about one methyl group per thousand carbon atoms, more preferably less than about 0.5 methyl group per thousand carbon atoms and less than about 1 wt.% Other components.

Similarly, you can use highly oriented high molecular weight polypropylene fibers with an average molecular weight of at least about 200,000, preferably at least about one million, and more preferably at least about two million. Such long-chain polypropylene can be formed into relatively high-oriented yarns according to the methods described in the above works, and especially according to the method of US patent No. 4413110. Since polypropylene is a less crystalline material than polyethylene and contains suspended methyl groups, the strength values of polypropylene are usually significantly lower than the corresponding quantities for polyethylene. Accordingly, it is preferable that the strength is at least about 8 g / d, more preferably at least about 11 g / d. Preferably, the initial tensile modulus is at least about 160 g / d, more preferably at least about 200 g / d. The melting point of polypropylene can usually be increased by several degrees using the orientation method, so it is preferred that the polypropylene strands melt substantially at least 168 ° C, more preferably at least 170 ° C. A particularly preferred range of the above parameters can lead to improved functioning of the final product. Such improvement of the final product can be achieved by using fibers with an average molecular weight of at least about 200,000, in combination with the preferred ranges for the above parameters (tensile modulus and strength).

In the case of long-chain polyethylene fibers, the manufacture and drawing of polyethylene fibers by gel spinning are described in various publications, including US Pat. Nos. 4,413,110; 4,430,383; 4,436,689; 4,536536; 4,545,950; 4,551,296; 4,612,148; 4,617,233; 4,663,101; 5,032,338; 5,246,657; 5,286,435; 5342567; 5,578,374; 5,736,244; 5,741,451; 5958582; 5,972,498; 6,448,359; 6969553 and publication of US patent application 2005/0093200.

In the case of aramid fibers, suitable fibers derived from aromatic polyamides are described in US Pat. No. 3,671,542, which is hereby incorporated by reference to the necessary extent. Preferred aramid fibers have a strength of at least about 20 g / d, an initial tensile modulus of at least about 400 g / d and a burst energy of at least about 8 J / g, and particularly preferred aramid fibers have a strength of at least about 20 g / d and a burst energy of at least about 20 J / g. Most preferred aramid fibers have a strength of at least about 23 g / d, an elastic modulus of at least about 500 g / d, and a burst energy of at least about 30 J / g. For example, poly (p-phenylene terephthalamide) yarns with a moderately high modulus of elasticity and strength are particularly suitable for the manufacture of ballistic-resistant composites. Examples are Twaron® T2000 from Teijin with a density of 1000. Other examples are Kevlar® 29 with an initial modulus of elasticity and strength of 500 g / d and 22 g / d, respectively, as well as Kevlar® 129 and KM2 from du Pont with a density of 400, 600 and 840 denier. Aramid fibers from other manufacturers may also be used in this invention. You can also use copolymers of poly (p-phenylene terephthalamide), such as a copolymer of poly (p-phenylene terephthalamide) with 3,4'-oxydiphenylene terephthalamide. Also in the practice of the invention, fibers from poly (m-phenylene isophthalamide) of the Nomex® trademark from du Pont are used.

High molecular weight polyvinyl alcohol (PV-OH) fibers with tensile modulus are described in US Pat. No. 4,440,711. High molecular weight PV-OH fibers should have an average molecular weight of at least about 200,000. Particularly suitable PV-OH fibers should preferably have an elastic modulus at a stretch of at least about 300 g / d, a strength of at least about 10 g / d, more preferably at least about 14 g / d and most preferably at least about 17 g / d, and a burst energy of at least but 8 J / g. A fiber with such properties can be obtained, for example, by the method disclosed in US patent No. 4599267.

In the case of polyacrylonitrile (PAN), the PAN fiber should have an average molecular weight of at least about 400,000. Particularly suitable PAN fibers should preferably have a strength of at least about 10 g / d and a burst energy of at least about 8 J / g. Most suitable are PAN fibers with a molecular weight of at least about 400,000, a strength of at least about 15-20 g / d and a burst energy of at least about 8 J / g; and such fibers are described, for example, in US patent No. 4535027.

Suitable ester fibers of the liquid crystal copolymers are described, for example, in US Pat. Nos. 3,975,487; 4118372 and 4161470. Ester liquid crystal copolymers sold under the brand name Vectran® fiber from Kuraray America Inc.

Suitable polybenzazole fibers for the practice of the present invention are described, for example, in US Pat. Nos. 5,286,833, 5,296,185, 5356,584, 5,534,205 and 604,050. Polybenzazole fibers are marketed under the brand name Zylon® from Toyobo Co.

Fibers in the form of a rigid rod are described, for example, in US Pat. Nos. 5674969, 5939553, 5945537 and 6040478. Such fibers are marketed under the M5® brand from Magellan Systems International.

If two or more types of high strength fibers are used in the rope of the present invention, it is preferable that one type of high strength fibers be a polyolefin fiber, more preferably a polyethylene fiber. The content of high strength polyethylene fiber in the ropes can vary widely depending on the different type of high strength fibers used and the desired properties of the fibers. High strength polyethylene fibers can comprise about 20-80 mass%, more preferably about 30-70 mass%, and most preferably about 40-60 mass%, based on the total weight of the high strength fibers in the rope. For example, ropes can be made from about 80-20 wt.% High-strength polyethylene fibers and, accordingly, 20-80 wt.% Aramid fibers; more preferably from about 70-30 wt.% high strength polyethylene fibers and, accordingly, from about 30-70 wt.% aramid fibers; most preferably from about 40-60 wt.% high strength polyethylene fibers and, accordingly, from about 60-40 wt.% aramid fibers. In one particularly preferred embodiment, the rope consists of about 70-55 wt.% Aramid fibers and, accordingly, about 30-45 wt.% High-strength polyethylene fibers, based on the total weight of high-strength fibers in the rope. In another embodiment of the invention, all or substantially all of the rope fibers are aramid fibers.

When using fibers from ester liquid crystal copolymers in combination with high strength polyethylene fibers, ropes can be made from about 80-20 wt.% High strength polyethylene fibers and, accordingly, about 20-80 wt.% Fibers from ester liquid crystal copolymers; more preferably from about 70-30 wt.% high-strength polyethylene fibers and, accordingly, about 30-70 wt.% fibers from ester liquid crystal copolymers; most preferably from about 40-60 wt.% high strength polyethylene fibers and, accordingly, from about 60-40 wt.% fibers of ester liquid crystal copolymers. In one particularly preferred embodiment, the rope consists of about 70-55 wt.% Fiber ester liquid crystal copolymers and, accordingly, about 30-45 wt.% High-strength polyethylene fibers, based on the total weight of high-strength fibers in the rope. In another embodiment of the invention, all or substantially all of the fibers of the rope are ester liquid crystal copolymer fibers.

If desired, other types of fibers can be used along with the high strength fibers mentioned above. Another type of fiber that can be included in the construction of the rope according to this invention along with high-strength fibers are fluoropolymer fibers. Such fibers from fluoropolymers include fibers derived from polytetrafluoroethylene (preferably foamed polytetrafluoroethylene), polychlorotrifluoroethylene (in the form of homopolymers and copolymers, including terpolymers), polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymers, ethylene-chlorofluorofluoro-trifluoro-ethylene-fluorofluoro-fluoromethyl-trifluoro-fluoromethylene fluorofluoro-fluoromethylene fluoromethylene fluoromethylene fluoride fluoride fluoride fluoride fluoride fluoride fluoride fluorides). etc., as well as mixtures of two or more of these polymers. Particularly preferred fluoropolymer fibers are fibers made from polytetrafluoroethylene and, in particular, fibers from foamed polytetrafluoroethylene. Such fibers are available, for example, by Lenzing Plastics GmbH & Co. KG and WL Gore & Associates.

The proportion of fluoropolymer fibers that are blended with high strength fibers can vary widely depending on the type of fluoropolymer and the end use. For example, the amount of fluoropolymer fibers in the mixture may be in the range of about 1-40 wt.%, More preferably about 5-25 wt.% And most preferably about 10-20 wt.%, Based on the total weight of the mixed fibers. Accordingly, the number of high-strength fibers can be in the range of about 60-99 wt.%, More preferably about 75-95 wt.% And most preferably about 80-90 wt.%, Based on the total weight of the fibers to be mixed.

The various types of fibers used in the ropes of this invention can be mixed in any suitable way. For example, one type of yarn can be twisted with another type of yarn to form a combination yarn, which is then braided into a rope. Alternatively, the combined fibers may be bicomponent having a sheath and a core. Other designs may be used. Different types of fibers can be in the rope at any desired location.

Preferably, the ropes of this invention consist of a mixture of two or more high strength fibers, optionally together with fluoropolymer fibers. These ropes can be of any desired construction, for example, it can be braided ropes, twisted ropes, ropes woven with wire, ropes with parallel cores, etc. Most preferably, the ropes are braided. The ropes can be of any desired diameter and can be made in any suitable way from the right fibers and / or yarn. For example, to make a braided rope, you can use a traditional weaving machine with many bobbins for yarn. As you know, when the bobbins move, yarn is formed above and below each strand, and as a result, it is collected on the take-up bobbin. Details of machines for weaving and details of the manufacture of ropes on them are known in the art and therefore are not described here.

A yarn of high strength fibers of one type can be formed in the form of a rope semi-finished product, which can then be turned into a rope (for example, by weaving) with the inclusion of another rope semi-finished product from yarn made of high-strength fibers of another type. Alternatively, the semi-finished product can be formed from mixtures of high-strength fibers, and such semi-finished products can be turned into a rope using other same semi-finished products or other types of semi-finished products by weaving or other suitable technique.

High-strength rope yarn can be of any suitable density, and fluoropolymer fiber yarns can have the same or different denier in comparison with high-strength fiber yarn. For example, high-strength yarns can have a density of about 50-5000 denier, more preferably about 75-2000 denier, even more preferably about 200-2000, and most preferably about 650-1500 denier. Yarn from fluoropolymers can have a density of about 50-2500 denier and more preferably about 400-1600 denier.

According to this invention, a composition is applied to the manufactured rope. Either individual fibers or yarn, or mixtures of fibers and yarn, are coated with a composition and then a rope is made from coated fibers or yarn, or a rope is first made and then coated with a composition. The composition applied contains an amino functionalized silicone resin and a neutralized low molecular weight polyethylene. Both components can be mixed in any desired ratio, for example, about 1-99 wt.% Neutralized low molecular weight polyethylene and an appropriate amount of silicone resin with functional amino groups. All percentages are by weight based on the total weight of the composition, unless otherwise indicated. Preferably, the neutralized low molecular weight polyethylene is present in an amount of about 30-90 wt.%, And the silicone resin with functional amino groups in an amount of about 10-70 wt.%. More preferably, the neutralized low molecular weight polyethylene is the main component of the coating, for example, in an amount of about 55-85 wt.% Of the applied composition, and amino functionalized silicone resin is present in an amount of about 15-45 wt.%. The composition may contain various additives depending on the desired final properties.

Since some high-strength fibers, such as high-modulus polyolefins, usually form a twisted finish after forming the rope, the applied composition used in the present invention is sometimes referred to as the finishing composition.

Preferably, the amine functionalized silicone is in the form of an emulsion. Preferably, the emulsion contains about 20-40 wt.% Silicone resin and has a pH in the range of about 4.5-6.5. Preferably, the emulsion contains a non-ionic emulsifier.

Similarly, the neutralized low molecular weight polyethylene is in the form of an emulsion. Preferably, the polyethylene is completely neutralized. Low molecular weight polyethylenes are also known as polyethylene weights and are sometimes called wax dispersions. As is known in the art, these polyethylene weights, also called resins, typically have a molecular weight of less than about 6000 Dalton, more preferably below about 3500 Dalton, and most preferably about 300-3000 Dalton.

The components of the composition to be applied can be mixed in any suitable manner. For example, an emulsion of amine-functionalized silicone can be added to a neutralized low molecular weight polyethylene in a stainless steel vessel or other inert material. Preferably, the vessel is equipped with a low shear mixer (laminar flow). When an emulsion of amine-functionalized silicone is added to a neutralized low molecular weight polyethylene, the pH of the system remains in the silk region. Alternatively, low molecular weight polyethylene can be added to the amine functionalized amine silicone emulsion. You can mix at any suitable temperature, preferably at about 15-45 ° C, more preferably about 20-30 ° C. Preferably, the applied composition contains a sufficient amount of solids, for example at least about 25 wt.% And more preferably at least about 30 wt.%. Most preferably, the solids content in the applied composition is about 33-35 wt.%. High solids coating emulsions have been found to adhere better to the fiber / yarn system or to the rope.

If the composition is applied directly to fiber or yarn, then any device can be used for application. Examples of such devices include lubricating rollers, contact rollers, immersion baths and finishing devices. To obtain a uniform coating and good rope performance, a constant temperature is desirable, as The viscosity of the system depends on temperature changes. If the composition is applied to a rope, the rope can be immersed in a bath with the composition applied, the excess of the composition being squeezed and then dried in air, or the rope can be coated and then passed through a heater to accelerate drying and air-dried.

It is desirable that the fiber / yarn or rope system be coated relatively fully with applied solids. Preferably, the final coating of the system is at least about 0.5 wt.%, More preferably at least about 5 wt.% And most preferably about 10-30 wt.%.

The following non-limiting examples are provided for a more complete understanding of the invention. The specific techniques, conditions, materials, ratios and published data provided to illustrate the principles of the invention are only examples and should not be construed as limiting the scope of the invention. All parts are by weight unless otherwise indicated.

EXAMPLES

Example 1

A braided rope was made from high-strength polyethylene yarn and yarn of ester liquid crystal copolymers. Used SPECTRA® 1000 polyethylene yarn from Honeywell International Inc. with a density of 1300, a strength of 35 g / d and a tensile modulus of 1150 g / d. Yarn from ester liquid crystal copolymers was Vectran® HT Type 97 from Kuraray America Inc. with a density of 1500, a strength of about 25 g / d and a tensile modulus of about 600 g / d. The yarn was coated with a finishing composition.

The finishing composition was prepared from amine functionalized silicone resin and neutralized low molecular weight polyethylene. The amine functionalized silicone resin was an emulsion with a silicone content of 35 wt.% And a pH of 4.5-6.5 and included a non-ionic emulsifier from Dow Corning (emulsion 2-8818). The neutralized low molecular weight polyethylene was a wax emulsion of neutralized low molecular weight polyethylene (Fluftone® 1566 from Apollo Chemical) with a solids content of 29-31 wt.% And a pH of 9.0-11.

The coating composition was prepared by mixing the neutralized low molecular weight polyethylene with an emulsion of amine functionalized silicone resin to a final content of neutralized low molecular weight polyethylene of 70 wt.%. The yarn was coated with a finishing composition at room temperature. The amount of coating on the yarn was about 15 wt.%.

Coated yarn was twisted into a 12-wire rope with a diameter of about 5 mm. The yarn was braided into a rope by first twisting three bundles of yarn together at a cord speed of 0.5 rpm. The cords were twisted in the "S" direction and in the "Z" direction. Then twelve cords were laid on a 12-wire braiding machine with alternation (S, Z, S, Z, etc.). Then three cords were woven together and received a 12-wire braided rope. The rope consisted of about 63 wt.% Polyethylene fiber and about 37 wt.% Fibers of ester liquid crystal copolymers.

The rope was tested for stability by repeated winding on a pulley (CBOS). In this test, ropes are wound about 180 times onto a freely rotating pulley or block. The ropes are wound on a pulley under load until the rope breaks. The test was carried out at a D: d ratio of 10 per block 1.3 inches (3.3 cm) at a speed of 75 cycles per minute with a pulley load of 100 kg (50 kg of load on each side of the rope). The number of cycles was determined as the average of 5 positions before the rope was damaged. The results are shown below in table 1.

Example 2 (comparative)

In development of Example 1, a woven rope was obtained in the same way, but without applying the finishing composition. The rope was also tested for CBOS resistance, and the results are shown below in table 1.

TABLE 1 Example Coating The number of cycles to break one Yes 97,295 2 * No 57,457 *comparative

The data in table 1 show that ropes made from mixtures of high strength polyethylene fibers and ester fibers of liquid crystal copolymers coated with the composition according to this invention have significantly higher resistance to CBOS wear.

Example 3

Example 1 was repeated except that the rope was made from 40 wt.% High-strength polyethylene fibers and 60 wt.% Fibers of ester liquid crystal copolymers and had a diameter of about 40 mm Close results were obtained.

Example 4

Example 1 was repeated except that the rope was made from 40 wt.% High strength polyethylene fibers and 60 wt.% Aramid fibers and had a diameter of about 40 mm. Close results were obtained.

Example 5

Example 1 was repeated except that the ropes were made of uncoated yarn and, after manufacture, the ropes were coated with a finishing composition by immersing the rope in the finishing composition at room temperature. Close results were obtained.

It can be seen that the present invention provides ropes with enhanced resistance to CBOS wear. As a result, these ropes can be used for various purposes, including the use on sea vessels for moving and immersing heavy objects from the sea.

Claims (10)

1. A rope with increased wear resistance upon repeated winding on a pulley consisting of high strength fibers, said rope and said fibers being coated with a composition containing amine functionalized silicone resin and neutralized low molecular weight polyethylene. 2. The rope according to claim 1, in which the high-strength fibers are selected from the group consisting of high molecular weight polyolefins, aramids, polyvinyl alcohol, polyacrylonitrile, polybenzazole, polyamide, esters, esters, liquid crystal esters, glass, coal, basalt, mineral fibers and fibers in the form of a rigid rod and mixtures thereof. 3. The rope according to claim 1, in which the high-strength fibers are a mixture of high-strength polyethylene fibers and other high-strength fibers that are not polyolefins, and these other fibers are aramid fibers and / or fibers of ester liquid crystal copolymers. 4. The rope according to claim 3, in which the composition is applied to the rope in an amount of at least about 5 wt.% Based on the weight of the rope. 5. The rope according to claim 3, additionally containing fluoropolymer fibers. 6. The rope according to claim 1, consisting of a mixture of high-strength polyethylene fibers and other high-strength fibers that are not polyolefins, and the rope and / or fibers are coated with a composition containing amine functionalized silicone resin and neutralized low molecular weight polyethylene. 7. A method of increasing rope service life by repeatedly winding it on a pulley, which includes forming a rope of high-strength fibers and applying and / or said fibers forming a rope to it, a composition containing amine functionalized silicone resin and neutralized low molecular weight polyethylene. 8. The method according to claim 7, in which the high-strength fibers are a mixture of high-strength polyethylene fibers and other high-strength fibers, and these other high-strength fibers include aramid fibers and / or ester fibers of liquid crystal copolymers. 9. The method of claim 8, comprising applying the specified composition to the rope, wherein low molecular weight polyethylene is present in an amount of about 55-85 wt.% Based on the total weight of the specified composition and low molecular weight polyethylene is completely neutralized. 10. A method of moving and mounting heavy objects from the bottom of the sea and to the seabed, which consists in using for this purpose a rope containing high-strength fibers, wherein the rope and / or fibers are coated with a composition containing amine functionalized silicone resin and neutralized low molecular weight polyethylene.