A high tensile strength and high weather resistance reel cable and preparation method thereof

Abstract

The invention discloses a high tensile strength and high weather resistance reel cable and a preparation method thereof in the technical field of reel cable preparation. The reel cable is modified by a slip ring stabilizer and modified polyurethane microspheres, thereby improving the tensile strength and weather resistance of the cable. The slip ring of the crown ether structure in the slip ring stabilizer can slide on the polymer molecular chain when subjected to high tensile stress, thereby slowing down the damage of the tensile stress to the cable and increasing the flexibility and ductility of the cable. The mechanical interlocking structure in the slip ring stabilizer increases the weather resistance of the cable and prolongs the service life. The weather resistance, strength and stiffness of the cable are enhanced by loading dimethyldiindenylsilane and aluminum borate whiskers on sepiolite. The loading of sepiolite improves the compatibility and dispersibility between dimethyldiindenylsilane and aluminum borate whiskers and other components, forming a complete and tight network structure, thereby improving the stability, resilience, flame retardancy, wear resistance, weather resistance and bending resistance of the cable.

Description

Technical Field

[0001] The invention belongs to the technical field of reel cable preparation, and in particular relates to a high-tensile-resistance and high-weather-resistance reel cable and a preparation method thereof. Background Art

[0002] The reel cable is a specially designed cable, which is mainly used in occasions that require frequent winding and unfolding. It consists of multiple insulated wires or optical fibers, which are formed by closely arranging them in a circular, disc-shaped structure. The design of the reel cable enables it to adapt to the needs of frequent winding and unfolding. It plays an important role in many fields such as stage, construction site, industry and medical treatment, providing reliable power, signal and data transmission, while simplifying the arrangement and use of cables. Since the reel cable needs to be frequently wound and unfolded, and the working scene is often outdoors, there are high requirements for the tensile strength and weather resistance of the reel cable. However, the tensile strength and weather resistance of the existing reel cable are poor. It is easy to be corroded by the external environment during long-term outdoor use, resulting in a decrease in mechanical properties, and then damage, which seriously affects the service life and safety of the reel cable. In view of this, it is necessary to propose a high-tensile and high-weather-resistant reel cable and a preparation method thereof. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high tensile strength and high weather resistance reel cable and a preparation method thereof. In order to solve the problem that the existing reel cable has poor tensile strength and weather resistance, and is easily corroded by the external environment during long-term outdoor use, resulting in a decrease in mechanical properties and further damage, the present invention uses a slip ring stabilizer and modified polyurethane microspheres to modify the reel cable to improve the tensile strength and weather resistance of the reel cable.

[0004] In order to achieve the above-mentioned purpose, the following technical scheme is adopted: The present invention provides a high-tensile strength and high-weather resistance reel cable, including a cable core layer, the cable core layer is composed of a metal wire layer, a wire insulation layer, and an inner protective layer from the inside to the outside, a grounding layer in conflict with the cable core layer is arranged in the gap outside the cable core layer, the grounding layer is composed of a grounding wire and a grounding insulation layer from the inside to the outside, the cable core layer and the grounding layer are each provided with three groups parallel to each other, the outside of the cable core layer and the grounding layer is filled with a fireproof filling layer, the outside of the fireproof filling layer is coated with a metal reinforcement layer, the outside of the metal reinforcement layer is coated with a weather-resistant protective layer, and the internal gaps of the cable core layer and the grounding layer are provided with core filling columns.

[0005] Furthermore, the weather-resistant protective layer comprises the following components in parts by weight: 65-85 parts of styrene-butadiene rubber, 60-70 parts of styrene-butadiene-styrene block copolymer, 45-60 parts of ethylene-vinyl acetate copolymer, 6-10 parts of sliding ring stabilizer, and 10-20 parts of modified polyurethane microspheres.

[0006] Furthermore, the slide ring stabilizer is prepared by the following steps:

[0007] (1) Dissolve terminal hydroxyl polydimethylsiloxane and p-toluenesulfonyl chloride in dichloromethane, add triethylamine, react at room temperature for 12-16 hours under nitrogen atmosphere, remove the solvent under reduced pressure, add DMF and sodium azide, react at 60-80° C. under nitrogen atmosphere for 8-10 hours, filter, wash the solid with deionized water, and dry under vacuum at 120° C. to obtain intermediate I;

[0008] (2) Dissolve 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, and 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile in glacial acetic acid, add N,N-dimethylaminopyridine, react at room temperature for 8-10 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120° C. to obtain intermediate II;

[0009] (3) The intermediate I and the intermediate II are dissolved in dichloromethane, reacted at room temperature for 1-2 hours, and then tetraethylammonium hexafluorophosphate is added, reacted at room temperature for 8-10 hours, washed with deionized water, extracted with dichloromethane, the organic phases are combined, the solvent is removed under reduced pressure, and vacuum dried at 120° C. to obtain the slip ring stabilizer.

[0010] Furthermore, in the step (1), the feed ratio of terminal hydroxyl polydimethylsiloxane, p-toluenesulfonyl chloride, triethylamine, dichloromethane, sodium azide and DMF is (0.5-0.6) mol: (1.5-1.7) mol: (2.2-2.5) mol: (10-15) L: (0.7-0.9) mol: (10-12) L.

[0011] Furthermore, in the step (2), the feed ratio of 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile, N,N-dimethylaminopyridine, and glacial acetic acid is (0.6-0.7) mol: (0.65-0.7) mol: (0.75-0.8) mol: (0.8-1.0) mol: (10-20) L.

[0012] Furthermore, in the step (3), the feed ratio of intermediate I, intermediate II, tetraethylammonium hexafluorophosphate and dichloromethane is: (0.4-0.5) mol: (0.65-0.8) mol: (0.02-0.04) mol: (5-8) L.

[0013] Furthermore, the preparation of the modified polyurethane microspheres comprises the following steps:

[0014] I. Mixing dimethylbisindenylsilane with ethanol to obtain solution A, dispersing aluminum borate whiskers and sepiolite powder in deionized water to obtain solution B, slowly adding solution A to solution B, after ultrasonic mixing, adding to a hydrothermal reactor and treating for 30-60 min, the reaction is completed, filtering, washing, and drying to obtain a sepiolite supported material;

[0015] II. Disperse the sepiolite loading material in ether to obtain solution C, dissolve polyurethane in dichloromethane to obtain solution D, add dibutyltin dilaurate to solution D, and then slowly add solution C. The reaction ends after 2-5 hours, filter out the solid, wash it, and vacuum dry it at 120° C. to obtain modified polyurethane microspheres.

[0016] Furthermore, in step I, the mass ratio of dimethylbisindenylsilane, ethanol, aluminum borate whiskers, sepiolite powder and deionized water is: 1-1.5: 6-8: 2-2.5: 1.5-2.5: 5-6.

[0017] Furthermore, in step II, the mass ratio of the sepiolite support material, ether, polyurethane, dichloromethane, and dibutyltin dilaurate is 2-3:10-15:2-3:8-12:0.05-0.1.

[0018] Furthermore, the metal wire is obtained by twisting a plurality of copper wires.

[0019] Furthermore, the wire insulation layer and the ground insulation layer are epoxy resin.

[0020] Furthermore, the inner protective layer is silicone rubber.

[0021] Furthermore, the grounding wire is a copper-plated steel wire.

[0022] Furthermore, the fireproof filling layer is aluminum silicate wool.

[0023] Furthermore, the metal reinforcement layer is a galvanized steel strip.

[0024] Furthermore, the preparation method of the high-tensile strength and high-weather resistance reel cable comprises: twisting copper wires to obtain a metal conductor layer, then wrapping a conductor insulation layer and an inner protective layer around the outside of the metal conductor layer to obtain the cable core layer, wrapping a grounding insulation layer around the outside of the grounding conductor to obtain a grounding layer, hot pressing the core filling material into a core filling column, arranging the cable core layer and the grounding layer on the core filling column, coating the cable core layer and the grounding layer with a fireproof filling layer, then weaving a galvanized steel strip around the outside of the fireproof filling layer to obtain a metal reinforcement layer, and extruding and coating the raw materials of the weather-resistant protective layer on the outside of the metal reinforcement layer to obtain the high-tensile strength and high-weather resistance reel cable.

[0025] The beneficial effects of the present invention are:

[0026] (1) The present invention provides a high-tensile-resistance and high-weather-resistance reel cable and a preparation method thereof. The reel cable is modified by a slip ring stabilizer and modified polyurethane microspheres, thereby effectively improving the tensile resistance and weather resistance of the reel cable, reducing the occurrence of mechanical property degradation and damage of the reel cable caused by erosion by the external environment, and improving the service life and safety of the reel cable;

[0027] (2) The slip ring stabilizer prepared by the present invention is a polymer containing a rotaxane molecular shuttle structure, wherein the slip ring containing a crown ether structure can slide on the polymer molecular chain under high tensile stress, thereby reducing the damage of the high tensile stress to the reel cable, increasing the flexibility and ductility of the reel cable, and thus improving the tensile performance of the reel cable. The mechanical interlocking structure in the slip ring stabilizer has a stability similar to that of a covalent bond, and can provide the reel cable with better weather resistance and extend the service life of the reel cable. The triazine ring generated by the click reaction during the preparation of the slip ring stabilizer of the present invention further enhances the stability and weather resistance of the reel cable.

[0028] (3) The present invention obtains a sepiolite loading material by using dimethylbisindenylsilane, aluminum borate whiskers and sepiolite powder, and then coats the material with polyurethane to obtain modified polyurethane microspheres. The aluminum borate whiskers have high strength, rigidity and weather resistance, and can increase the strength and rigidity of the weather-resistant protective layer of the reel cable, and increase the wear resistance of the weather-resistant protective layer of the reel cable. The dimethylbisindenylsilane is fully cross-linked with the other components of the weather-resistant protective layer of the reel cable to form a complete and tight network structure, so that the reel cable can be subjected to external tensile stress. It can withstand greater forces and reduce damage caused by stretching. It also has good weather resistance and effectively prevents aging and degradation of the reel cable. The use of sepiolite powder for loading can provide a larger specific surface area and achieve better dispersion effects, so that dimethylbisindenylsilane and aluminum borate whiskers can achieve a synergistic effect while maintaining their unique properties. Compared with adding them separately, the weather-resistant protective layer of the reel cable not only retains the stability, resilience and weather resistance of polyurethane, but also enhances the flame retardant effect, wear resistance and bending resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional schematic diagram of a high tensile strength and high weather resistance reel cable of the present invention;

[0030] Figure 2 The results of air oven aging tests of various embodiments and comparative examples of the present invention are shown;

[0031] Figure 3 The results of thermal extension tests of various embodiments and comparative examples of the present invention are shown;

[0032] Figure 4The results of low temperature tensile tests of various embodiments and comparative examples of the present invention are shown;

[0033] Figure 5 The following are the anti-ultraviolet test results of various embodiments and comparative examples of the present invention.

[0034] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0035] legend:

[0036] 1. Cable core layer; 11. Metal conductor layer; 12. Conductor insulation layer; 13. Inner sheath; 2. Grounding layer; 21. Grounding conductor; 22. Grounding insulation layer; 3. Fireproof filling layer; 4. Metal reinforcement layer; 5. Weather-resistant protective layer; 6. Core filling column. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0039] The experimental methods in the following examples are conventional methods unless otherwise specified, and the experimental materials used in the following examples are purchased from commercial channels unless otherwise specified.

[0040] Example 1

[0041] A high tensile strength and high weather resistance reel cable and preparation method thereof

[0042] according to Figure 1The high tensile strength and high weather resistance reel cable comprises a cable core layer 1, which is composed of a metal wire layer 11, a wire insulation layer 12 and an inner sheath 13 from the inside to the outside. A grounding layer 2 in conflict with the cable core layer 1 is arranged in the gap outside the cable core layer 1, and the grounding layer 2 is composed of a grounding wire 21 and a grounding insulation layer 22 from the inside to the outside. The cable core layer 1 and the grounding layer 2 are each provided with three groups parallel to each other. The outside of the cable core layer 1 and the grounding layer 2 is filled with a fireproof filling layer 3, and the outside of the fireproof filling layer 3 is coated with a metal reinforcement layer 4, and the outside of the metal reinforcement layer 4 is coated with a weather-resistant protective layer 5. The internal gaps of the cable core layer 1 and the grounding layer 2 are provided with core filling columns 6.

[0043] The weather-resistant protective layer comprises the following components in parts by weight: 65 parts of styrene-butadiene rubber, 60 parts of styrene-butadiene-styrene block copolymer, 45 parts of ethylene-vinyl acetate copolymer, 6 parts of sliding ring stabilizer, and 10 parts of modified polyurethane microspheres.

[0044] The slide ring stabilizer is prepared by the following steps:

[0045] (1) Dissolve terminal hydroxyl polydimethylsiloxane and p-toluenesulfonyl chloride in dichloromethane, add triethylamine, react at room temperature for 12 h under nitrogen atmosphere, remove the solvent under reduced pressure, add DMF and sodium azide, react at 60° C. under nitrogen atmosphere for 8 h, filter, wash the solid with deionized water, and dry under vacuum at 120° C. to obtain intermediate I;

[0046] (2) Dissolve 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, and 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile in glacial acetic acid, add N,N-dimethylaminopyridine, react at room temperature for 8 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120° C. to obtain intermediate II;

[0047] (3) The intermediate I and the intermediate II are dissolved in dichloromethane, reacted at room temperature for 1 hour, and then tetraethylammonium hexafluorophosphate is added, reacted at room temperature for 8 hours, washed with deionized water, extracted with dichloromethane, the organic phases are combined, the solvent is removed under reduced pressure, and vacuum dried at 120° C. to obtain the slip ring stabilizer.

[0048] In the step (1), the feed ratio of terminal hydroxyl polydimethylsiloxane, p-toluenesulfonyl chloride, triethylamine, dichloromethane, sodium azide and DMF is 0.5 mol: 1.5 mol: 2.2 mol: 10 L: 0.7 mol: 10 L; in the step (2), the feed ratio of 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile, N,N-dimethylaminopyridine and glacial acetic acid is 0.6 mol: 0.65 mol: 0.75 mol: 0.8 mol: 10 L; in the step (3), the feed ratio of intermediate I, intermediate II, tetraethylammonium hexafluorophosphate and dichloromethane is 0.4 mol: 0.65 mol: 0.02 mol: 5 L.

[0049] The preparation of the modified polyurethane microspheres comprises the following steps:

[0050] I. Mixing dimethylbisindenylsilane with ethanol to obtain solution A, dispersing aluminum borate whiskers and sepiolite powder in deionized water to obtain solution B, slowly adding solution A to solution B, after ultrasonic mixing, adding to a hydrothermal reactor and treating for 30 min, the reaction is completed, filtering, washing, and drying to obtain a sepiolite supported material;

[0051] II. The sepiolite loading material is dispersed in ether to obtain solution C, polyurethane is dissolved in dichloromethane to obtain solution D, dibutyltin dilaurate is added to the solution D, and then the solution C is slowly added. The reaction ends after 2 hours, the solid is filtered out, washed, and vacuum dried at 120° C. to obtain modified polyurethane microspheres.

[0052] In the step I, the mass ratio of dimethylbisindenylsilane, ethanol, aluminum borate whiskers, sepiolite powder, and deionized water is 1:6:2:1.5:5; in the step II, the mass ratio of sepiolite support material, ether, polyurethane, dichloromethane, and dibutyltin dilaurate is 2:10:2:8:0.05.

[0053] The metal conductor is obtained by twisting a plurality of copper wires; the conductor insulation layer and the ground insulation layer are epoxy resin; the inner sheath is silicone rubber; the ground conductor is copper-plated steel wire; the fireproof filling layer is aluminum silicate wool; and the metal reinforcement layer is galvanized steel strip.

[0054] The preparation method of the high-tensile strength and high-weather resistance reel cable comprises: twisting copper wires to obtain a metal conductor layer 11, then wrapping a conductor insulation layer 12 and an inner protective layer 13 around the outside of the metal conductor layer 11 to obtain the cable core layer 1, wrapping a ground insulation layer 22 around the outside of the ground conductor 21 to obtain a ground layer 2, hot pressing the core filling material into a core filling column 6, arranging the cable core layer 1 and the ground layer 2 on the core filling column 6, coating the cable core layer 1 and the ground layer 2 with a fireproof filling layer 3, then weaving a galvanized steel strip around the outside of the fireproof filling layer 3 to obtain a metal reinforcement layer 4, and extruding and coating the raw materials of the weather-resistant protective layer 5 on the outside of the metal reinforcement layer 4 to obtain the high-tensile strength and high-weather resistance reel cable.

[0055] Example 2

[0056] A high tensile strength and high weather resistance reel cable and preparation method thereof

[0057] The structure of the high tensile strength and high weather resistance reel cable is the same as that of Example 1.

[0058] The weather-resistant protective layer comprises the following components in parts by weight: 85 parts of styrene-butadiene rubber, 70 parts of styrene-butadiene-styrene block copolymer, 60 parts of ethylene-vinyl acetate copolymer, 10 parts of sliding ring stabilizer, and 20 parts of modified polyurethane microspheres.

[0059] The slide ring stabilizer is prepared by the following steps:

[0060] (1) Dissolve terminal hydroxyl polydimethylsiloxane and p-toluenesulfonyl chloride in dichloromethane, add triethylamine, react at room temperature for 16 hours under nitrogen atmosphere, remove the solvent under reduced pressure, add DMF and sodium azide, react at 80°C for 10 hours under nitrogen atmosphere, filter, wash the solid with deionized water, and dry under vacuum at 120°C to obtain intermediate I;

[0061] (2) Dissolve 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, and 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile in glacial acetic acid, add N,N-dimethylaminopyridine, react at room temperature for 10 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120° C. to obtain intermediate II;

[0062] (3) The intermediate I and the intermediate II are dissolved in dichloromethane, reacted at room temperature for 2 hours, and then tetraethylammonium hexafluorophosphate is added, reacted at room temperature for 10 hours, washed with deionized water, extracted with dichloromethane, the organic phases are combined, the solvent is removed under reduced pressure, and vacuum dried at 120° C. to obtain the slip ring stabilizer.

[0063] In the step (1), the feed ratio of terminal hydroxyl polydimethylsiloxane, p-toluenesulfonyl chloride, triethylamine, dichloromethane, sodium azide and DMF is 0.6 mol: 1.7 mol: 2.5 mol: 15 L: 0.9 mol: 12 L; in the step 2, the feed ratio of 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile, N,N-dimethylaminopyridine and glacial acetic acid is 0.7 mol: 0.7 mol: 0.8 mol: 1.0 mol: 20 L; in the step 3, the feed ratio of intermediate I, intermediate II, tetraethylammonium hexafluorophosphate and dichloromethane is 0.5 mol: 0.8 mol: 0.04 mol: 8 L.

[0064] The preparation of the modified polyurethane microspheres comprises the following steps:

[0065] I. Mixing dimethylbisindenylsilane with ethanol to obtain solution A, dispersing aluminum borate whiskers and sepiolite powder in deionized water to obtain solution B, slowly adding solution A to solution B, mixing evenly with ultrasound, adding to a hydrothermal reactor and treating for 60 min, completing the reaction, filtering, washing and drying to obtain a sepiolite supported material;

[0066] II. Disperse the sepiolite loading material in ether to obtain solution C, dissolve polyurethane in dichloromethane to obtain solution D, add dibutyltin dilaurate to solution D, and then slowly add solution C. The reaction ends after 5 hours, filter out the solid, wash it, and vacuum dry it at 120° C. to obtain modified polyurethane microspheres.

[0067] In the step I, the mass ratio of dimethylbisindenylsilane, ethanol, aluminum borate whiskers, sepiolite powder and deionized water is 1.5:8:2.5:2.5:6; in the step II, the mass ratio of sepiolite support material, ether, polyurethane, dichloromethane and dibutyltin dilaurate is 3:15:3:12:0.1.

[0068] The metal conductor is obtained by twisting a plurality of copper wires; the conductor insulation layer and the ground insulation layer are epoxy resin; the inner sheath is silicone rubber; the ground conductor is copper-plated steel wire; the fireproof filling layer is aluminum silicate wool; and the metal reinforcement layer is galvanized steel strip.

[0069] The preparation method of the high tensile strength and high weather resistance reel cable is the same as that in Example 1.

[0070] Example 3

[0071] A high tensile strength and high weather resistance reel cable and preparation method thereof

[0072] The structure of the high tensile strength and high weather resistance reel cable is the same as that of Example 1.

[0073] The weather-resistant protective layer comprises the following components in parts by weight: 70 parts of styrene-butadiene rubber, 65 parts of styrene-butadiene-styrene block copolymer, 50 parts of ethylene-vinyl acetate copolymer, 8 parts of sliding ring stabilizer, and 15 parts of modified polyurethane microspheres.

[0074] The slide ring stabilizer is prepared by the following steps:

[0075] 1 Dissolve the hydroxy-terminated polydimethylsiloxane and p-toluenesulfonyl chloride in dichloromethane, add triethylamine, react at room temperature for 14 h under a nitrogen atmosphere, remove the solvent under reduced pressure, add DMF and sodium azide, react at 70 ° C for 9 h under a nitrogen atmosphere, filter, wash the solid with deionized water, and dry in vacuo at 120 ° C to obtain intermediate I;

[0076] 2 Dissolve 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, and 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile in glacial acetic acid, add N,N-dimethylaminopyridine, react at room temperature for 9 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120°C to obtain intermediate II;

[0077] 3. Dissolve the intermediate I and intermediate II in dichloromethane, react at room temperature for 1.5 hours, then add tetraethylammonium hexafluorophosphate, react at room temperature for 9 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120° C. to obtain the slip ring stabilizer.

[0078] In the step 1, the feeding ratio of terminal hydroxyl polydimethylsiloxane, p-toluenesulfonyl chloride, triethylamine, dichloromethane, sodium azide and DMF is 0.55mol:1.6mol:2.4mol:12L:0.8mol:11L; in the step 2, the feeding ratio of 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile, N,N-dimethylaminopyridine and glacial acetic acid is 0.65mol:0.68mol:0.78mol:0.9mol:15L; in the step 3, the feeding ratio of intermediate I, intermediate II, tetraethylammonium hexafluorophosphate and dichloromethane is 0.45mol:0.7mol:0.03mol:7L.

[0079] The preparation of the modified polyurethane microspheres comprises the following steps:

[0080] I. Mixing dimethylbisindenylsilane with ethanol to obtain solution A, dispersing aluminum borate whiskers and sepiolite powder in deionized water to obtain solution B, slowly adding solution A to solution B, after ultrasonic mixing, adding to a hydrothermal reactor and treating for 50 min, the reaction is completed, filtering, washing, and drying to obtain a sepiolite supported material;

[0081] II. Disperse the sepiolite loading material in ether to obtain solution C, dissolve polyurethane in dichloromethane to obtain solution D, add dibutyltin dilaurate to solution D, and then slowly add solution C. The reaction ends after 4 hours, filter out the solid, wash it, and vacuum dry it at 120° C. to obtain modified polyurethane microspheres.

[0082] In the step I, the mass ratio of dimethylbisindenylsilane, ethanol, aluminum borate whiskers, sepiolite powder and deionized water is 1.2:7:2.2:2:5.5; in the step II, the mass ratio of sepiolite support material, ether, polyurethane, dichloromethane and dibutyltin dilaurate is 2.5:12:2.5:9:0.07.

[0083] The metal conductor is obtained by twisting a plurality of copper wires; the conductor insulation layer and the ground insulation layer are epoxy resin; the inner sheath is silicone rubber; the ground conductor is copper-plated steel wire; the fireproof filling layer is aluminum silicate wool; and the metal reinforcement layer is galvanized steel strip.

[0084] The preparation method of the high tensile strength and high weather resistance reel cable is the same as that in Example 1.

[0085] Comparative Example 1

[0086] A reel cable and a method for preparing the same

[0087] The difference between this comparative example and Example 1 is that equal amounts of SBR, SBS and EVA are used to replace the slip ring stabilizer in the weather-resistant protective layer of the reel cable, and the remaining structures, components, component contents and preparation methods are the same as those in Example 1.

[0088] Comparative Example 2

[0089] A reel cable and a method for preparing the same

[0090] The difference between this comparative example and Example 1 is that the modified polyurethane microspheres are replaced by equal amounts of SBR, SBS and EVA in the weather-resistant protective layer of the reel cable, and the remaining structures, components, component contents and preparation methods are the same as those in Example 1.

[0091] Comparative Example 3

[0092] A reel cable and a method for preparing the same

[0093] The difference between this comparative example and Example 1 is that the weather-resistant protective layer of the reel cable does not contain a slip ring stabilizer and modified polyurethane microspheres, and the remaining structures, components, component contents, and preparation methods are the same as those of Example 1.

[0094] Results Analysis

[0095] The tensile strength and elongation at break of the reel cables prepared in the embodiments and comparative examples of the present invention were tested according to GB / T2951-2008. The specimens had a gauge length of 25 mm, a width of 6 mm, a dumbbell shape, and a tensile speed of 200 mm / min.

[0096] The oxygen index of the reel cables prepared in the embodiments and comparative examples of the present invention was measured by using an HC-2 oxygen index meter. The sample size was 100 mm×6.5 mm×3 mm.

[0097] The smoke density of the reel cables prepared in the embodiments and comparative examples of the present invention was measured using a CW-5355 smoke density meter, and the sample size was 25 mm×25 mm×3 mm.

[0098] The above test results are shown in Table 1.

[0099] The reel cables prepared in each embodiment and comparative example were subjected to air oven aging test using XL-016A ventilation aging oven at a temperature of (150±2)°C for 168h. The results are shown in Table 1. Figure 2 .

[0100] The reel cables prepared in each embodiment and comparative example were subjected to a thermal extension test using an XL-RYS thermal extension tester at a temperature of (200±3)°C, a load time of 15 min, and a mechanical stress of 20 N / cm. The results are shown in Table 1. Figure 3 .

[0101] The reel cables prepared in each embodiment and comparative example were subjected to a low-temperature tensile test using a ZOT-7130 low-temperature folding tester at a temperature of (-40±2)°C, a load time of 15 min, and a mechanical stress of 20 N / cm. The results are shown in Figure 4 .

[0102] The LQ-UV1-S type anti-ultraviolet durability test chamber was used to conduct an anti-ultraviolet test on the reel cables prepared in each embodiment and comparative example at a temperature of (40±2)°C for 720 hours. The results are shown in Figure 5 .

[0103] Table 1 Test results of mechanical properties and flame retardant properties of reel cables prepared in various embodiments and comparative examples

[0104] project Tensile strength / MPa Elongation at break / % Oxygen index / % Smoke density / % Example 1 27.2 472 22.5 25.5 Example 2 26.7 483 23.2 24.5 Example 3 25.8 466 24.1 26.1 Comparative Example 1 22.1 358 26.2 27.6 Comparative Example 1 20.5 340 28.8 28.5 Comparative Example 1 19.3 325 29.5 27.2

[0105] It can be seen from Table 1 that each embodiment shows stronger tensile properties than each comparative example, indicating that the reel cable prepared by the present invention has higher tensile strength and elongation at break, and excellent flame retardant properties. Figure 2-5 It can be seen that each embodiment shows higher resistance to high temperature, heat extension, low temperature and UV rays than each comparative example, which indicates that the reel cable prepared by the present invention has excellent weather resistance.

[0106] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0107] The present invention and its implementation methods are described above, which is not restrictive. The drawings are only one of the implementation methods of the present invention, and the actual application is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A high tensile strength and high weather resistance reel cable, comprising a cable core layer (1), characterized in that: The cable core layer (1) is composed of a metal conductor layer (11), a conductor insulation layer (12), and an inner sheath (13) from the inside to the outside. A grounding layer (2) in contact with the cable core layer (1) is provided in the gap outside the cable core layer (1). The grounding layer (2) is composed of a grounding conductor (21) and a grounding insulation layer (22) from the inside to the outside. The cable core layer (1) and the grounding layer (2) are each provided with three groups parallel to each other. The outside of the cable core layer (1) and the grounding layer (2) are filled with a fireproof filling layer (3). The fireproof filling layer (3) is coated with a metal reinforcement layer (4) on the outside, and the metal reinforcement layer (4) is coated with a weather-resistant protective layer (5) on the outside. A core filling column (6) is arranged at the internal gap between the cable core layer (1) and the grounding layer (2); the weather-resistant protective layer comprises the following components in parts by weight: 65-85 parts of styrene-butadiene rubber, 60-70 parts of styrene-butadiene-styrene block copolymer, 45-60 parts of ethylene-vinyl acetate copolymer, 6-10 parts of sliding ring stabilizer, and 10-20 parts of modified polyurethane microspheres; The slide ring stabilizer is prepared by the following steps: (1) Dissolve terminal hydroxyl polydimethylsiloxane and p-toluenesulfonyl chloride in dichloromethane, add triethylamine, react at room temperature for 12-16 hours under nitrogen atmosphere, remove the solvent under reduced pressure, add DMF and sodium azide, react at 60-80° C. under nitrogen atmosphere for 8-10 hours, filter, wash the solid with deionized water, and dry under vacuum at 120° C. to obtain intermediate I; (2) Dissolve 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown ether-6, and 2-bromo-4-(2-hydroxyethoxy)-5-methoxybenzonitrile in glacial acetic acid, add N,N-dimethylaminopyridine, react at room temperature for 8-10 hours, wash with deionized water, extract with dichloromethane, combine the organic phases, remove the solvent under reduced pressure, and dry in vacuo at 120° C. to obtain intermediate II; (3) dissolving the intermediate I and the intermediate II in dichloromethane, reacting at room temperature for 1-2 hours, adding tetraethylammonium hexafluorophosphate, reacting at room temperature for 8-10 hours, washing with deionized water, extracting with dichloromethane, combining the organic phases, removing the solvent under reduced pressure, and vacuum drying at 120° C. to obtain the slip ring stabilizer; The preparation of the modified polyurethane microspheres comprises the following steps: I. Mixing dimethylbisindenylsilane with ethanol to obtain solution A, dispersing aluminum borate whiskers and sepiolite powder in deionized water to obtain solution B, slowly adding solution A to solution B, after ultrasonic mixing, adding to a hydrothermal reactor and treating for 30-60 min, the reaction is completed, filtering, washing, and drying to obtain a sepiolite supported material; II. Disperse the sepiolite loading material in ether to obtain solution C, dissolve polyurethane in dichloromethane to obtain solution D, add dibutyltin dilaurate to solution D, and then slowly add solution C. The reaction ends after 2-5 hours, filter out the solid, wash it, and vacuum dry it at 120° C. to obtain modified polyurethane microspheres.

2. The high tensile strength and high weather resistance reel cable according to claim 1, characterized in that: In the step (1), the feed ratio of terminal hydroxyl polydimethylsiloxane, p-toluenesulfonyl chloride, triethylamine, dichloromethane, sodium azide, and DMF is (0.5-0.6) mol: (1.5-1.7) mol: (2.2-2.5) mol: (10-15) L: (0.7-0.9) mol: (10-12) L; in the step (2), 4,4'-biphenyldicarboxylic acid, 4'-aminobenzo-18-crown-6, 2-bromo-4-(2-hydroxyethoxy)-5-methoxy The feed ratio of benzonitrile, N,N-dimethylaminopyridine and glacial acetic acid is (0.6-0.7) mol: (0.65-0.7) mol: (0.75-0.8) mol: (0.8-1.0) mol: (10-20) L; the feed ratio of intermediate I, intermediate II, tetraethylammonium hexafluorophosphate and dichloromethane in the step (3) is: (0.4-0.5) mol: (0.65-0.8) mol: (0.02-0.04) mol: (5-8) L.

3. The high tensile strength and high weather resistance reel cable according to claim 2, characterized in that: In the step I, the mass ratio of dimethylbisindenylsilane, ethanol, aluminum borate whiskers, sepiolite powder and deionized water is: 1-1.5: 6-8: 2-2.5: 1.5-2.5: 5-6; in the step II, the mass ratio of sepiolite support material, ether, polyurethane, dichloromethane and dibutyltin dilaurate is 2-3: 10-15: 2-3: 8-12: 0.05-0.

1.

4. The high tensile strength and high weather resistance reel cable according to claim 3, characterized in that: The metal wire is obtained by twisting a plurality of copper wires.

5. The high tensile strength and high weather resistance reel cable according to claim 4, characterized in that: The wire insulation layer and the ground insulation layer are epoxy resin.

6. The high tensile strength and high weather resistance reel cable according to claim 5, characterized in that: The inner protective layer is made of silicone rubber, and the grounding wire is made of copper-plated steel wire.

7. The high tensile strength and high weather resistance reel cable according to claim 6, characterized in that: The fireproof filling layer is aluminum silicate wool, and the metal reinforcement layer is galvanized steel strip.

8. A method for preparing a high tensile strength and high weather resistance reel cable according to any one of claims 1 to 7, characterized in that: Copper wires are twisted to obtain a metal conductor layer (11), and then a conductor insulation layer (12) and an inner protective layer (13) are respectively wrapped around the outside of the metal conductor layer (11) to obtain the cable core layer (1), and a grounding insulation layer (22) is wrapped around the outside of the grounding conductor (21) to obtain a grounding layer (2), and a core filling material is hot pressed into a core filling column (6), and the cable core layer (1) and the grounding layer (2) are arranged on the core filling column (6), and a fireproof filling layer (3) is coated on the outside of the cable core layer (1) and the grounding layer (2), and then a galvanized steel strip is woven on the outside of the fireproof filling layer (3) to obtain a metal reinforcement layer (4), and the raw materials of the weather-resistant protective layer (5) are extruded and coated on the outside of the metal reinforcement layer (4) to obtain the high tensile strength and high weather resistance reel cable.

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