High-strength and high-wear-resistance cable and preparation method thereof

Abstract

The application relates to the technical field of wire and cable materials, in particular to a high-strength and high-wear-resistance cable and a preparation method thereof, which comprises the following components: 51-63 parts by weight of polyvinyl chloride, 12-17 parts by weight of reinforcing particles, 6-10 parts by weight of glass fibers, 7-9 parts by weight of polytetrafluoroethylene micro powder, 2-4 parts by weight of barium titanate, 3-7 parts by weight of nano silicon dioxide, 11-14 parts by weight of magnesium hydroxide, 4-7 parts by weight of bis-[3-(triethoxysilane) propyl] tetrasulfide, 8-14 parts by weight of plasticizer, 0.6-1.2 parts by weight of dibutyl tin maleate, and 3-5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole; wherein the reinforcing particles are obtained by modifying lanthanum sulfide, a boron source and polyethylene grafted maleic anhydride; the lanthanum sulfide is modified by using boron elements and polyethylene grafted maleic anhydride, the lanthanum sulfide is non-metallic doped by using the boron source, so that the crystal lattice structure of the lanthanum sulfide is changed, the polyethylene grafted maleic anhydride is used as a compatibilizer, the interfacial adhesion is improved, and the strength and wear resistance of the cable are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire and cable materials, in particular to a high-strength and high-wear-resistance cable and a preparation method thereof. BACKGROUND

[0002] Cables are indispensable infrastructure in modern electrical and communication systems, and can be divided into power cables, communication cables, control cables, coaxial cables, optical fiber cables and other types according to different purposes, structures, transmission media and working environments. Power cables are mainly used for power transmission and distribution, and are the "blood vessels" of the power grid system. The internal conductor material of the power cable is mostly copper or aluminum, and the insulating layer is made of high molecular materials such as polyethylene and cross-linked polyethylene to improve electrical performance and aging resistance. Communication cables are responsible for the transmission of sound, image and data signals. Optical fiber cables have become the first choice for modern long-distance communication and high-speed Internet connection due to their extremely high transmission rate and anti-interference performance.

[0003] During the laying and use of the cable, various external forces such as pulling, extrusion and impact may be encountered, or the outer layer may be damaged due to friction and wear during use, thereby exposing the internal conductor and increasing the safety hazard. In view of this, a high-strength and high-wear-resistance cable and a preparation method thereof are provided. SUMMARY

[0004] The present application aims to provide a high-strength and high-wear-resistance cable and a preparation method thereof to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides a high-strength and high-wear-resistance cable, which comprises the following components: polyvinyl chloride 51-63 parts by weight, reinforcing particles 12-17 parts by weight, glass fiber 6-10 parts by weight, polytetrafluoroethylene micro powder 7-9 parts by weight, barium titanate 2-4 parts by weight, nano silicon dioxide 3-7 parts by weight, magnesium hydroxide 11-14 parts by weight, bis-[3-(triethoxysil) propyl] tetrasulfide 4-7 parts by weight, plasticizer 8-14 parts by weight, dibutyl tin maleate 0.6-1.2 parts by weight, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole 3-5 parts by weight.

[0006] The reinforcing particles are obtained by modifying lanthanum sulfide, boron source and polyethylene grafted maleic anhydride.

[0007] As a preferred embodiment, the glass fiber has a length of 6-9 mm and a diameter of 10-14 μm.

[0008] As a preferred embodiment, the plasticizer is one of acetyl tri-butyl citrate, dioctyl adipate and sebacate.

[0009] As a preferred embodiment, the preparation method of the reinforcing particles is as follows:

[0010] The boron source is dried in an oven under inert atmosphere at 140-150°C for 8-12h, and then mixed with lanthanum sulfide in a glove box, and then put into a quartz boat, and placed in a tube furnace which has been pre-evacuated and filled with argon, heated to 800-900°C under the protection of flowing reducing gas hydrogen for 2-4h, and then the sample is taken out after cooling, to obtain the non-metallic dopant of lanthanum sulfide, polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution, the non-metallic dopant of lanthanum sulfide is added to the polyethylene grafted maleic anhydride solution, ultrasonic treatment for 20-30min, filtered and dried in an inert atmosphere to obtain reinforced particles.

[0011] Lanthanum sulfide (La2S3) has high hardness, and can effectively improve the strength and wear resistance of cable materials as a filler when added to the cable sheath preparation process, but the toughness and ductility of lanthanum sulfide is poor, which means that it is prone to breakage rather than bending or deformation when subjected to external force, so the toughness of the material will also decrease, so it needs to be modified, boron is used to prepare a non-metallic dopant of lanthanum sulfide, which changes the crystal lattice structure of lanthanum sulfide by introducing non-metallic ions, thereby enhancing its toughness and ductility, because boron will introduce additional point defects in lanthanum sulfide, these defects can act as pinning points for dislocation motion, preventing them from easily slipping or merging into larger defects, thereby enhancing the material's resistance to deformation, in addition, due to the difference in electronegativity between the dopant element and the host material, they will generate a local stress field around them, these stress fields can redistribute stress when the material is subjected to external force, reducing stress concentration points and reducing the probability of crack formation, even if a crack begins to form, the complex structure caused by lattice distortion will increase the tortuosity of the crack propagation path, providing additional resistance to slow down or prevent further crack propagation, thereby effectively improving the strength and wear resistance of lanthanum sulfide.

[0012] Although the non-metallic dopant of lanthanum sulfide has good strength and wear resistance, its compatibility with polyvinyl chloride is poor, so polyethylene grafted maleic anhydride is used to improve compatibility, thereby improving the density of the overall material, and thereby improving the strength and wear resistance of the material, specifically, the La 3+ on the surface of lanthanum sulfide can combine with the carboxylate ions on the polyethylene grafted maleic anhydride to form ionic bonds, which can effectively improve the interfacial adhesion between the filler and the polymer matrix, thereby improving the overall performance of the composite material.

[0013] As a preferred, the boron source is selected from one of boron oxide, boric acid and borax.

[0014] As a preferred, the mass ratio of the lanthanum sulfide to the boron source is 1:0.04-0.07.

[0015] As preferred, the concentration of the polyethylene grafted maleic anhydride solution is 1-5wt%.

[0016] As preferred, the mass ratio of the non-metallic dopant of lanthanum sulfide to the polyethylene grafted maleic anhydride is 1:4-6.

[0017] In another aspect, the application provides a preparation method of a high-strength and high-wear-resistance cable, for the high-strength and high-wear-resistance cable in any one of the above aspects, comprising the following steps:

[0018] The nanometer silicon dioxide and the plasticizer are first uniformly dispersed by using ultrasonic equipment, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene micro powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole are added, then the mixed materials are extruded and granulated by using a double-screw extruder, the extruder parameters are set, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately cooled and shaped in a water cooling tank, then the cable is pulled out by using a traction device, and the cable is continuously cooled and shaped, thereby obtaining a high-strength and high-wear-resistance cable.

[0019] As preferred, the extruder parameters include a screw rotation speed of 80-100 rpm, a feeding section temperature of 140-150℃, a compression section temperature of 160-170℃, a melting section temperature of 170-180℃, and a die temperature of 180-190℃.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] In the high-strength and high-wear-resistance cable and the preparation method thereof, the reinforcing particles are prepared by using lanthanum sulfide, a boron source and polyethylene grafted maleic anhydride, the defects are introduced by the non-metallic doping of the boron source, the strength and wear resistance of the lanthanum sulfide are improved, the polyethylene grafted maleic anhydride is introduced to improve the compatibility of the lanthanum sulfide non-metallic dopant in the polyvinyl chloride material, the uniformity and compactness of the overall material are improved, and the strength and wear resistance of the cable material are further improved. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0023] The high-strength and high-wear-resistance cable of the application comprises the following components: 51-63 parts by weight of polyvinyl chloride, 12-17 parts by weight of reinforcing particles, 6-10 parts by weight of glass fiber, 7-9 parts by weight of polytetrafluoroethylene powder, 2-4 parts by weight of barium titanate, 3-7 parts by weight of nano-silicon dioxide, 11-14 parts by weight of magnesium hydroxide, 4-7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 8-14 parts by weight of plasticizer, 0.6-1.2 parts by weight of dibutyltin maleate, and 3-5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole;

[0024] The reinforcing particles are modified by lanthanum sulfide, boron source and polyethylene grafted maleic anhydride; the plasticizer is preferably sebacic acid ester, and the boron source is preferably borax.

[0025] Embodiment 1: A high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0026] The components are prepared as follows: 63 parts by weight of polyvinyl chloride, 15 parts by weight of reinforcing particles, 10 parts by weight of glass fiber, 9 parts by weight of polytetrafluoroethylene powder, 4 parts by weight of barium titanate, 7 parts by weight of nano-silicon dioxide, 14 parts by weight of magnesium hydroxide, 7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 14 parts by weight of sebacic acid ester, 1.2 parts by weight of dibutyltin maleate, and 5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole;

[0027] The reinforcing particles are modified by lanthanum sulfide, borax and polyethylene grafted maleic anhydride; the mass ratio of lanthanum sulfide to boron source is 1:0.04; the mass ratio of non-metallic dopant of lanthanum sulfide to polyethylene grafted maleic anhydride is 1:4; the glass fiber is 8 mm long and 12 μm in diameter;

[0028] The borax is dried in an oven under inert atmosphere at 150℃ for 12h, and then mixed with the lanthanum sulfide in a glove box, and then put into a quartz boat and placed in a tube furnace which has been pre-evacuated and filled with argon, heated to 800℃ under the protection of flowing reducing gas hydrogen for 4h, and then the sample is taken out after cooling to obtain the non-metallic dopant of lanthanum sulfide, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5wt%, the non-metallic dopant of lanthanum sulfide is added to the polyethylene grafted maleic anhydride solution, and ultrasonic treatment is performed for 30min, and then filtered and dried in an inert atmosphere to obtain the reinforcing particles;

[0029] The nanometer silicon dioxide and the plasticizer are dispersed uniformly by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole are added, then the mixed material is extruded and granulated by using a double-screw extruder, the extruder parameters are set, the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and before extrusion, the cable core is sent into the extruder die, the extruded cable sheath is immediately cooled and shaped in a water cooling tank, then, the cable is pulled out by a traction device, continuously cooled and shaped, and a high-strength and high-wear-resistance cable is obtained.

[0030] Embodiment 2: A high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0031] The components are prepared: 63 parts by weight of polyvinyl chloride, 15 parts by weight of reinforcing particles, 10 parts by weight of glass fiber, 9 parts by weight of polytetrafluoroethylene powder, 4 parts by weight of barium titanate, 7 parts by weight of nanometer silicon dioxide, 14 parts by weight of magnesium hydroxide, 7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 14 parts by weight of sebacate, 1.2 parts by weight of dibutyl tin maleate, and 5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole;

[0032] The reinforcing particles are obtained by modifying sulfidized lanthanum, borax and polyethylene grafted maleic anhydride; the mass ratio of sulfidized lanthanum to boron source is 1:0.06; the mass ratio of non-metallic dopant of sulfidized lanthanum to polyethylene grafted maleic anhydride is 1:5; the glass fiber is 8 mm long and 12 μm in diameter;

[0033] The borax is dried in an oven under inert atmosphere at 150 DEG C for 12 h, in a glove box, the dried borax and the sulfidized lanthanum are uniformly mixed, then put into a quartz boat and placed in a tube furnace which is pre-vacuumized and filled with argon, in the tube furnace, heated to 800 DEG C under the protection of flowing reducing gas hydrogen for 4 h, after cooling, the sample is taken out, the non-metallic dopant of sulfidized lanthanum is obtained, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5 wt%, the non-metallic dopant of sulfidized lanthanum is added into the polyethylene grafted maleic anhydride solution, ultrasonic treatment is carried out for 30 min, filtration and drying in inert atmosphere are carried out, and the reinforcing particles are obtained;

[0034] The nanometer silicon dioxide and the plasticizer are uniformly dispersed by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole are added, then the mixed material is extruded and granulated by using a double-screw extruder, the extruder parameters are set as follows: the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately put into a water cooling tank for cooling and shaping, then the cable sheath is pulled out by using a traction device, and the cable sheath is continuously cooled and shaped, so a high-strength and high-wear-resistance cable is obtained.

[0035] Embodiment 3: A high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0036] The components are prepared: 63 parts by weight of polyvinyl chloride, 15 parts by weight of reinforcing particles, 10 parts by weight of glass fiber, 9 parts by weight of polytetrafluoroethylene powder, 4 parts by weight of barium titanate, 7 parts by weight of nanometer silicon dioxide, 14 parts by weight of magnesium hydroxide, 7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 14 parts by weight of sebacate, 1.2 parts by weight of dibutyl tin maleate, and 5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole;

[0037] The reinforcing particles are obtained by modifying sulfidized lanthanum, borax and polyethylene grafted maleic anhydride; the mass ratio of sulfidized lanthanum to boron source is 1:0.07; the mass ratio of non-metallic dopant of sulfidized lanthanum to polyethylene grafted maleic anhydride is 1:6; the glass fiber is 8 mm long and 12 μm in diameter;

[0038] The borax is dried in an oven under inert atmosphere at 150 DEG C for 12 h, in a glove box, the dried borax and the sulfidized lanthanum are uniformly mixed, then the mixture is put into a quartz boat and placed in a tube furnace which is pre-evacuated and filled with argon, in the tube furnace, the mixture is heated to 800 DEG C under the protection of flowing reducing gas hydrogen for 4 h, the sample is taken out after cooling, and the non-metallic dopant of sulfidized lanthanum is obtained, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5 wt%, the non-metallic dopant of sulfidized lanthanum is added into the polyethylene grafted maleic anhydride solution, and ultrasonic treatment is conducted for 30 min, then the mixture is filtered and dried in an inert atmosphere, and the reinforcing particles are obtained;

[0039] The nanometer silicon dioxide and the plasticizer are uniformly dispersed by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole are added, then the mixed material is extruded and granulated by using a double-screw extruder, the extruder parameters are set as follows: the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately put into a water cooling tank for cooling and shaping, then the cable sheath is pulled out by using a traction device, and the cable sheath is continuously cooled and shaped, so a high-strength and high-wear-resistance cable is obtained.

[0040] Embodiment 4: A high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0041] The components are prepared: 51 parts by weight of polyvinyl chloride, 15 parts by weight of reinforcing particles, 6 parts by weight of glass fiber, 7 parts by weight of polytetrafluoroethylene powder, 2 parts by weight of barium titanate, 3 parts by weight of nanometer silicon dioxide, 11 parts by weight of magnesium hydroxide, 4 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 8 parts by weight of sebacate, 0.6 parts by weight of dibutyl tin maleate, and 3 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole;

[0042] The reinforcing particles are obtained by modifying sulfidized lanthanum, borax and polyethylene grafted maleic anhydride; the mass ratio of sulfidized lanthanum to boron source is 1:0.06; the mass ratio of non-metallic dopant of sulfidized lanthanum to polyethylene grafted maleic anhydride is 1:5; the glass fiber is 8 mm long and 12 μm in diameter;

[0043] The borax is dried in an oven under inert atmosphere at 150 DEG C for 12 h, in a glove box, the dried borax and the sulfidized lanthanum are uniformly mixed, then the mixture is put into a quartz boat and placed in a tube furnace which is pre-evacuated and filled with argon, in the tube furnace, the mixture is heated to 800 DEG C under the protection of flowing reducing gas hydrogen for 4 h, the sample is taken out after cooling, and the non-metallic dopant of sulfidized lanthanum is obtained, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5 wt%, the non-metallic dopant of sulfidized lanthanum is added into the polyethylene grafted maleic anhydride solution, and ultrasonic treatment is carried out for 30 min, then the mixture is filtered and dried in an inert atmosphere, and the reinforcing particles are obtained;

[0044] The nanometer silicon dioxide and the plasticizer are dispersed uniformly by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole are added, then the mixed material is extruded and granulated by using a double-screw extruder, the extruder parameters are set as follows: the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately put into a water cooling tank for cooling and shaping, then the cable sheath is pulled out by using a traction device, and the cable sheath is continuously cooled and shaped, so a high-strength and high-wear-resistance cable is obtained.

[0045] Embodiment 5: a high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0046] The components are prepared: 63 parts by weight of polyvinyl chloride, 12 parts by weight of reinforcing particles, 10 parts by weight of glass fiber, 9 parts by weight of polytetrafluoroethylene powder, 4 parts by weight of barium titanate, 7 parts by weight of nanometer silicon dioxide, 14 parts by weight of magnesium hydroxide, 7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 14 parts by weight of sebacate, 1.2 parts by weight of dibutyl tin maleate, and 5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole;

[0047] The reinforcing particles are obtained by modifying sulfidized lanthanum, borax and polyethylene grafted maleic anhydride; the mass ratio of sulfidized lanthanum to boron source is 1:0.06; the mass ratio of non-metallic dopant of sulfidized lanthanum to polyethylene grafted maleic anhydride is 1:5; the glass fiber is 8 mm long and 12 μm in diameter;

[0048] The borax is dried in an oven under inert atmosphere at 150 DEG C for 12 h, in a glove box, the dried borax and the sulfidized lanthanum are uniformly mixed, then the mixture is put into a quartz boat and placed in a tube furnace which is pre-evacuated and filled with argon, in the tube furnace, the mixture is heated to 800 DEG C under the protection of flowing reducing gas hydrogen for 4 h, the sample is taken out after cooling, and the non-metallic dopant of sulfidized lanthanum is obtained, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5 wt%, the non-metallic dopant of sulfidized lanthanum is added into the polyethylene grafted maleic anhydride solution, and ultrasonic treatment is conducted for 30 min, then the mixture is filtered and dried in inert atmosphere, and the reinforcing particles are obtained;

[0049] The nanometer silicon dioxide and the plasticizer are uniformly dispersed by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole are added, then the mixed material is extruded and granulated by using a double-screw extruder, the extruder parameters are set as follows: the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately put into a water cooling tank for cooling and shaping, then the cable sheath is pulled out by using a traction device, and the cable sheath is continuously cooled and shaped, so a high-strength and high-wear-resistance cable is obtained.

[0050] Embodiment 6: A high-strength and high-wear-resistance cable and a preparation method thereof, comprising the following steps:

[0051] The components are prepared: 63 parts by weight of polyvinyl chloride, 17 parts by weight of reinforcing particles, 10 parts by weight of glass fiber, 9 parts by weight of polytetrafluoroethylene powder, 4 parts by weight of barium titanate, 7 parts by weight of nanometer silicon dioxide, 14 parts by weight of magnesium hydroxide, 7 parts by weight of bis-[3-(triethoxysil) propyl] tetrasulfide, 14 parts by weight of sebacate, 1.2 parts by weight of dibutyl tin maleate, and 5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butyl phenyl)-5-chlorobenzotriazole;

[0052] The reinforcing particles are obtained by modifying sulfidized lanthanum, borax and polyethylene grafted maleic anhydride; the mass ratio of sulfidized lanthanum to boron source is 1:0.06; the mass ratio of non-metallic dopant of sulfidized lanthanum to polyethylene grafted maleic anhydride is 1:5; the glass fiber is 8 mm long and 12 μm in diameter;

[0053] The borax is dried in an oven under inert atmosphere at 150 DEG C for 12 h, in a glove box, the dried borax and the sulfidized lanthanum are uniformly mixed, then the mixture is put into a quartz boat and placed in a tube furnace which is pre-evacuated and filled with argon, in the tube furnace, the mixture is heated to 800 DEG C under the protection of flowing reducing gas hydrogen for 4 h, the sample is taken out after cooling, and the non-metallic dopant of sulfidized lanthanum is obtained, the polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution with a concentration of 5 wt%, the non-metallic dopant of sulfidized lanthanum is added into the polyethylene grafted maleic anhydride solution, and ultrasonic treatment is conducted for 30 min, then the mixture is filtered and dried in inert atmosphere, and the reinforcing particles are obtained;

[0054] The nanometer silicon dioxide and the plasticizer are dispersed uniformly by using an ultrasonic device, then the polyvinyl chloride, the reinforcing particles, the glass fiber, the polytetrafluoroethylene powder, the barium titanate, the nanometer silicon dioxide, the magnesium hydroxide and the bis-[3-(triethoxysil) propyl] tetrasulfide are added into a high-speed mixer, finally the dibutyl tin maleate and the 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole are added, then the mixed materials are extruded and granulated by using a double-screw extruder, the extruder parameters are set as follows: the screw rotation speed is 80 rpm, the feeding section temperature is 140 DEG C, the compression section temperature is 160 DEG C, the melting section temperature is 170 DEG C, the die temperature is 180 DEG C, and the cable core is sent into the extruder die before extrusion, the cable sheath after extrusion is immediately cooled and shaped in a water cooling tank, then the cable sheath is pulled out by a traction device, and the cable sheath is continuously cooled and shaped, so a high-strength and high-wear-resistance cable is obtained.

[0055] Comparative Example 1: The method of Example 2 is adopted, and no reinforcing particles are added.

[0056] Comparative Example 2: The method of Example 2 is adopted, and the lanthanum sulfide is directly used without modification by borax and polyethylene grafted maleic anhydride.

[0057] Comparative Example 3: The method of Example 2 is adopted, and the lanthanum sulfide and borax are directly used without modification by polyethylene grafted maleic anhydride.

[0058] The high-strength and high-wear-resistance cable prepared by using the reinforcing particles has the following performance index test items and test standards:

[0059] The Shore hardness tester is used, after the probe contacts with the sample, the value displayed on the hardness tester is read after 15 seconds, and the average value is obtained by repeating the test; the universal testing machine is used, the tensile rate is set as 500 mm / min, the tensile strength and the breaking elongation of the cable sheath are measured, the tensile strength is the maximum stress that the material can withstand under the tensile load, and the limit bearing capacity and the breaking resistance of the material under the uniaxial tensile load are evaluated, the breaking elongation is the ratio of the elongation before the material breaks to the original length, and is an important index for evaluating the toughness of the material, and the high breaking elongation means that the material can have a greater degree of plastic deformation before breaking, so that the material has better impact breaking resistance; the Taber wear tester is used, the circular sample with a diameter of 100 mm and a thickness of 6 mm is prepared, the sample is weighed before the test, and the initial mass is recorded, the load is 10 N, the rotation number is 1000 times, the sample mass after the test is measured, and the mass difference before and after the wear is calculated.

[0060] The cables prepared in Examples 1-6 and Comparative Examples 1-3 are tested by the above-mentioned standards, and the data obtained are shown in Table 1:

[0061] Table 1 Performance data of Examples 1-6 and Comparative Examples 1-3

[0062]

[0063] The above data fully shows that the reinforcing particles of Examples 1-6 can sufficiently show the effect of the reinforcing particles on the strength and wear resistance of the cable compared to Comparative Examples 1-3.

[0064] Since the cable is prepared by using the reinforcing particles according to the present application, the performance of the cable is effectively improved by the reinforcing particles, and the details are as follows:

[0065] As can be seen from Examples 1-3, the strength and wear resistance of the cable first increase and then decrease as the proportion of the reinforcing particle component increases, which shows that the appropriate amount of boron element introduced to prepare the non-metallic dopant can effectively improve the toughness and ductility of lanthanum sulfide, and the polyethylene grafted maleic anhydride can improve the compatibility and interfacial adhesion between the lanthanum sulfide non-metallic dopant and the polyvinyl chloride matrix. However, when the proportion of the two components is too high, on the one hand, it will cause too many defects in the lanthanum sulfide lattice, and on the other hand, it will cause uneven dispersion of the filler in the polymer matrix, forming agglomerates, which will weaken the mechanical properties of the material and become a stress concentration point, thereby reducing the overall strength and wear resistance.

[0066] As can be seen from Examples 2 and 4, the strength and wear resistance of the cable do not change significantly as the content of other components changes, which shows that small changes in the content of other components within a certain range are not enough to significantly affect the strength and wear resistance of the cable.

[0067] As can be seen from Examples 2, 5 and 6, the strength and wear resistance of the cable change as the content of the reinforcing particles changes, which is because the increase of the reinforcing particles in the total content will first improve the strength and wear resistance of the cable, but excessive reinforcing particles will cause excessive filling, making the composite material too hard and reducing its flexibility. At the same time, it will also cause the accumulation of fillers, affecting the uniformity and continuity of the material, and thus causing the strength and wear resistance to decrease.

[0068] According to the above test experiments, it can be known that the high-strength and high-wear-resistance cable prepared according to Example 2 has the optimal performance, and Example 2 is taken as the optimal example;

[0069] As can be seen from the comparison of Example 2 and Comparative Examples 1-3:

[0070] Comparative Example 1 does not add reinforcing particles, and the strength and wear resistance of the cable are worse, which is because the lack of additional reinforcing components to provide mechanical support and improve the material properties, and only relying on the characteristics of polyvinyl chloride itself is not enough to have significant height and wear resistance.

[0071] The comparative example 2 directly uses lanthanum sulfide, and lanthanum sulfide is not modified by borax and polyethylene grafted maleic anhydride, and the strength and wear resistance of the cable are worse. Due to the low toughness and ductility of lanthanum sulfide itself, rigid areas can be formed in the matrix, which can act as stress concentration points and more easily initiate cracks when subjected to mechanical stress, thereby weakening the strength and wear resistance of the overall structure, so it cannot effectively play the role of a reinforcing agent. In addition, the compatibility between unmodified lanthanum sulfide and the polyvinyl chloride matrix is poor, so the strength and wear resistance of the cable are poor.

[0072] The comparative example 3 directly uses lanthanum sulfide and borax, and lanthanum sulfide and borax are not modified by polyethylene grafted maleic anhydride, and the strength and wear resistance of the cable are worse. Because lanthanum sulfide and polyvinyl chloride belong to completely different material systems, the difference in surface chemical properties between the two is significant, resulting in low affinity between them and making it difficult to form strong interfacial adhesion. Polyethylene grafted maleic anhydride is a functional polymer, and the carboxylate ions on it can combine with La 3+ ions on the surface of lanthanum sulfide to form chemical bonds, thereby enhancing the interfacial adhesion between the filler and the matrix. Therefore, the lack of polyethylene grafted maleic anhydride results in poor strength and wear resistance of the cable.

[0073] In summary, lanthanum sulfide is modified by boron and polyethylene grafted maleic anhydride. Lanthanum sulfide provides hardness, boron source is used for non-metallic doping to change the crystal lattice structure of lanthanum sulfide, and the toughness and ductility of lanthanum sulfide are improved. Polyethylene grafted maleic anhydride as a compatibilizer improves the interfacial adhesion, and the compatibility between the non-metallic dopant of lanthanum sulfide and the polyvinyl chloride matrix is improved, and the compactness and continuity of the composite material are enhanced, thereby significantly improving the strength and wear resistance of the cable.

[0074] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A high-strength and high-wear-resistant cable, characterized in that: The invention comprises the following components: 51-63 parts by weight of polyvinyl chloride, 12-17 parts by weight of reinforcing particles, 6-10 parts by weight of glass fiber, 7-9 parts by weight of polytetrafluoroethylene micropowder, 2-4 parts by weight of barium titanate, 3-7 parts by weight of nano-silicon dioxide, 11-14 parts by weight of magnesium hydroxide, 4-7 parts by weight of bis-[3-(triethoxysilyl)propyl]tetrasulfide, 8-14 parts by weight of plasticizer, 0.6-1.2 parts by weight of dibutyltin maleate, and 3-5 parts by weight of 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole; Among them, the reinforced particles are obtained by modifying lanthanum sulfide, boron source and polyethylene grafted with maleic anhydride; The preparation method of the reinforced particles is as follows: The boron source is placed in an oven under an inert atmosphere and dried at 140-150°C for 8-12 hours. In a glove box, the dried boron source is evenly mixed with lanthanum sulfide, and then placed in a quartz boat and placed in a tube furnace that has been pre-evacuated and filled with argon. In the tube furnace, under the protection of flowing reducing gas hydrogen, the mixture is heated to 800-900°C and maintained for 2-4 hours. After cooling, the sample is taken out to obtain a non-metallic dopant of lanthanum sulfide. Polyethylene grafted maleic anhydride is dissolved in dichloromethane to prepare a polyethylene grafted maleic anhydride solution. The non-metallic dopant of lanthanum sulfide is added to the polyethylene grafted maleic anhydride solution, ultrasonically treated for 20-30 minutes, filtered and dried in an inert atmosphere to obtain reinforced particles.

2. The cable according to claim 1, wherein: The glass fiber has a length of 6-9 mm and a diameter of 10-14 μm.

3. The cable according to claim 1, wherein: The plasticizer is one of acetyl tributyl citrate, dioctyl adipate, and sebacic acid ester.

4. The cable according to claim 1, wherein: The boron source is selected from one of boron oxide, boric acid and borax.

5. The cable according to claim 1, characterized in that: The mass ratio of the lanthanum sulfide to the boron source is 1:0.04-0.

07.

6. The cable according to claim 1, characterized in that: The concentration of the polyethylene grafted maleic anhydride solution is 1-5 wt %.

7. The cable according to claim 1, characterized in that: The mass ratio of the non-metallic dopant of lanthanum sulfide to the polyethylene grafted maleic anhydride is 1:4-6.

8. A method for preparing a high-strength and high-wear-resistant cable, for preparing the cable according to any one of claims 1 to 7, characterized in that: The steps include: First, nano-silica and plasticizer are evenly dispersed using ultrasonic equipment, then polyvinyl chloride, reinforcing particles, glass fiber, polytetrafluoroethylene powder, barium titanate, nano-silica, magnesium hydroxide and bis-[3-(triethoxysilyl)propyl] tetrasulfide are added to a high-speed mixer, and finally dibutyltin maleate and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole are added. The mixed materials are then extruded and granulated using a twin-screw extruder, the extruder parameters are set, and the cable core wire is fed into the extruder mold before extrusion. The extruded cable sheath immediately enters a water cooling tank for cooling and shaping, and then is pulled out through a traction device, and further cooled and shaped to obtain a high-strength and high-wear-resistant cable.

9. The method for preparing a high-strength and high-wear-resistant cable according to claim 8, characterized in that: The extruder parameters include screw speed of 80-100 rpm, feeding section temperature of 140-150°C, compression section temperature of 160-170°C, melting section temperature of 170-180°C, and die head temperature of 180-190°C.

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