Wear-resistant flame-retardant material for optical cable sheath and preparation method thereof

Abstract

The invention belongs to the field of optical cable sheaths, and particularly relates to a wear-resistant flame-retardant material for an optical cable sheath and a preparation method of the wear-resistant flame-retardant material. The wear-resistant flame-retardant material for the optical cable sheath comprises the following components in parts by weight: 60-80 parts of ethylene-vinyl acetate resin, 20-30 parts of polyethylene resin, 8-12 parts of a wear-resistant agent, 14-18 parts of a flame retardant, 0.5-1 part of an antioxidant and 1-3 parts of an anti-dripping agent, the wear-resistant agent comprises the following components: silicone powder, lignin and chlorosulfonated polyethylene rubber; the structure of the flame retardant is # imgabs0 #. Due to the synergistic effect of all the components in the wear-resisting agent, the wear-resisting agent has good wear resistance and good compatibility, and the mechanical property is improved while the wear-resisting and flame-retardant properties of the wear-resisting agent are improved.

Description

Technical Field

[0001] The invention belongs to the field of optical cable sheaths, in particular to a wear-resistant and flame-retardant material for optical cable sheaths and a preparation method thereof. Background Art

[0002] As a key physical layer infrastructure of the modern information society, optical cables have deeply penetrated into multiple application scenarios. In the field of communications, it is not only the underlying support for high-speed Internet transmission, but also builds a transoceanic communication backbone network through low-loss optical fiber, meets the real-time interaction needs of cloud computing and big data centers with ultra-high bandwidth and signal fidelity, and becomes the main artery of global information flow. Faced with the challenges brought by complex deployment environments, the optical cable protection system shows a trend of intelligent evolution. Threats such as deep-sea high pressure, underground acid and alkali corrosion, and urban electromagnetic interference have spawned multi-layer composite sheath technology. Through the combination of nano-coating and intelligent monitoring modules, an active defense system with both mechanical protection and state perception is built. This upgrade from passive protection to intelligent early warning not only extends the life cycle of optical cables, but also builds a resilient barrier for communication networks through real-time status feedback, ensuring that the information artery in the digital economy era continues to beat steadily.

[0003] CN108919453A discloses a waterproof and flame-retardant communication optical cable, comprising a cable core and a sheath, wherein the outer surface of the cable core is covered with a first fire-resistant layer, the outer surface of the first fire-resistant layer is covered with a water-blocking layer, the outer surface of the water-blocking layer is covered with an insulating layer, the outer surface of the insulating layer is covered with a steel mesh layer, the outer surface of the steel mesh layer is covered with a wear-resistant layer, the outer surface of the wear-resistant layer is covered with an oxygen-isolating layer, the outer surface of the oxygen-isolating layer is covered with an elastic layer, the outer surface of the elastic layer is covered with a second fire-resistant layer, the outer surface of the second fire-resistant layer is covered with an armor layer, and the outer surface of the armor layer is covered with a sheath; this technical solution achieves the purpose of waterproofing and flame-retarding the optical cable by stacking protective layers, which will obviously limit the application scope of the optical cable due to its heavy volume.

[0004] CN108641175A discloses a wear-resistant lightweight optical cable sheath material and a preparation method thereof, comprising the following components: ethylene-vinyl acetate copolymer, PE resin, aluminum hydroxide, wear-resistant components, reinforcing particles, polyethylene wax, antioxidants, and anti-aging agents; the technical solution has high wear resistance and mechanical properties, as well as flame retardant properties. Wrapping the material in the outer layer of an optical cable can not only improve the safety of the optical cable, but also extend its service life; the technical solution does not make a specific analysis of the beneficial effects.

[0005] Therefore, there is an urgent need to develop an optical cable protective sheath material that has both excellent wear resistance and flame retardant properties, which can achieve the function of traditional multi-layer protection with a single-layer structure, thereby breaking through the bottleneck of limited application scenarios of current optical cable sheath materials. Summary of the invention

[0006] The invention provides a wear-resistant and flame-retardant material for an optical cable sheath, which has excellent wear resistance and flame retardancy.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A wear-resistant flame-retardant material for an optical cable sheath, comprising the following components by weight: 60-80 parts of ethylene-vinyl acetate resin, 20-30 parts of polyethylene resin, 8-12 parts of abrasion resistant agent, 14-18 parts of flame retardant, 0.5-1 part of antioxidant, 1-3 parts of anti-dripping agent; the abrasion resistant agent comprises the following components: silicone powder, lignin, chlorosulfonated polyethylene rubber; the structure of the flame retardant is .

[0008] Preferably, the preparation process of the flame retardant comprises the following steps: (1) under a nitrogen atmosphere, dimethylphosphonoacetic acid (20 mmol), 1.6-hexanediol (18-20 mmol), and p-toluenesulfonic acid (0.2-0.25 mmol) are added to toluene, and the mixture is reacted at 90-100° C. for 10-16 hours, and the intermediate 1 is obtained after purification; (2) the intermediate 1 and trimethylamine are added to chloroform, the mixture is stirred evenly, and trimethylchlorosilane is added dropwise to react for 10-16 hours, and the flame retardant is obtained after purification.

[0009] Preferably, in step (1), the molar ratio of dimethylphosphonoacetic acid, 1,6-hexanediol and p-toluenesulfonic acid is 20:(18-20):(0.2-0.25).

[0010] Preferably, in step (2), the molar ratio of intermediate 1, trimethylamine and trimethylchlorosilane is 20: (40-50): (30-40).

[0011] Preferably, the mass ratio of the silicone powder, lignin and chlorosulfonated polyethylene rubber is 1:(0.8-1.2):(0.5-0.7).

[0012] Preferably, the polyethylene resin includes linear low-density polyethylene and low-density polyethylene.

[0013] Preferably, the anti-dripping agent is one of montmorillonite or zinc borate.

[0014] Preferably, the antioxidant is one or both of antioxidant 1010 and antioxidant 168.

[0015] Preferably, the melt index of the linear low-density polyethylene is 4-10 g / 10 min; the melt index of the low-density polyethylene is 4-10 g / 10 min.

[0016] Preferably, the preparation method of the anti-wear agent includes the following process: adding silicone powder and lignin to ethanol, adding chlorosulfonated polyethylene rubber after uniform dispersion, reacting at 50-70° C. for 3-5 hours, and obtaining the anti-wear agent after treatment.

[0017] The preparation method of the wear-resistant and flame-retardant material for optical cable sheath prepared according to the above method comprises the following steps: step 1: weighing ethylene-vinyl acetate resin, polyethylene resin, wear-resistant agent, flame retardant, antioxidant, and anti-dripping agent, vacuum drying them at 60-80°C for 10-16h, and then mixing them evenly to obtain the prepared material; step 2: putting the prepared material into an internal mixer and mixing them at 140-160°C for 15-30min, transferring the mixed material to a twin-screw extruder, extruding at 150-155°C, and granulating to obtain the wear-resistant and flame-retardant material for optical cable sheath.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention prepares the wear-resistant and flame-retardant material for the optical cable sheath by scientifically proportioning the wear-resistant agent with ethylene-vinyl acetate resin, polyethylene resin, wear-resistant agent, flame retardant, antioxidant and anti-dripping agent, thereby improving the wear-resistant and flame-retardant properties of the material and the mechanical properties, thereby expanding the scope of application of the material.

[0019] The wear-resistant agent of the present invention is prepared by scientifically mixing silicone powder, lignin and chlorosulfonated polyethylene rubber, and cooperating with other materials to prepare the wear-resistant and flame-retardant material for optical cable sheath, which has obvious beneficial effects; the silicone powder is filled into the three-dimensional structure of lignin, and is further cross-linked with the chlorosulfonated polyethylene rubber; the chlorosulfonated polyethylene rubber has a highly active chlorosulfonyl group, which is cross-linked with lignin and silicone powder; the main chain is a chemically stable saturated hydrocarbon, which is entangled with the saturated hydrocarbon main chain of ethylene-vinyl acetate resin and polyethylene resin, so that the mechanical properties of the wear-resistant and flame-retardant material for optical cable sheath can be further improved; due to the synergistic effect of each component in the wear-resistant agent, the wear-resistant agent has good wear resistance and good compatibility.

[0020] The siloxane bond at one end of the flame retardant of the present invention improves the rubber performance through the dual effects of interface coupling and molecular chain crosslinking; its siloxane group forms a chemical bond with the filler (such as anti-wear agent) after hydrolysis to improve dispersibility, and the organic functional group (phosphate group) reacts with the rubber molecule to enhance the interface bonding force and optimize the stress transfer efficiency; the medium-length (C6) carbon chain acts as a "molecular bridge" to reduce the polarity difference between silane and rubber matrix and improve compatibility. Its flexible structure can buffer dynamic loads and delay crack propagation, while optimizing processing fluidity and promoting uniform dispersion of fillers, thereby improving wear resistance and tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the preparation process of the flame retardant of the present invention. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is further described below in conjunction with specific embodiments and accompanying drawings. In the description of the present invention, unless otherwise specified, the reagents used are all commercially available, and the methods used are all conventional techniques in the art.

[0023] Preparation Example The preparation process of flame retardant Figure 1 As shown, the following steps are included: (1) Under nitrogen atmosphere, a reaction device containing a water separator (toluene is placed in the water separator) was constructed. Dimethylphosphonoacetic acid (20 mmol), 1.6-hexanediol (18-20 mmol), and p-toluenesulfonic acid (0.2-0.25 mmol) were added to 40 mL of toluene. After stirring evenly, the mixture was reacted at 90-100°C for 10-16 h. The mixture was cooled to room temperature and the reaction solution was washed with a saturated sodium bicarbonate aqueous solution. The toluene phase was dried over sodium sulfate and concentrated. The intermediate 1 was obtained by purification by column chromatography (70% by volume petroleum ether, 30% by volume ethyl acetate). 1 H-NMR (C 10 H 21 O 6 P, 300 MHz, DMSO) δ 4.70 (s, 1H), 4.12 (t, 2H), 3.65-3.60 (m, 8H), 2.96 (s, 2H), 1.61-1.42 (m, 8H).

[0024] (2) Under nitrogen atmosphere, intermediate 1 (20.0 mmol) and trimethylamine (40 mmol) were added to 40 mL of chloroform, stirred evenly, and trimethylsilyl chloride (30.0 mmol) was added dropwise. The mixture was reacted at room temperature for 10-16 h. The reaction solution was washed with water, and the organic phase was collected and dried over sodium sulfate. The crude mixture was purified by column chromatography (dichloromethane) to obtain a flame retardant. 1 H-NMR (C 13 H 29 O 6 PSi, 300 MHz, DMSO) δ 4.12 (t, 2H), 3.78 (t, 2H), 3.67 (d, 6H), 2.96 (d, 2H), 1.61-1.42 (m, 8H), 0.20 (s, 9H). Example 1

[0025] A wear-resistant flame-retardant material for an optical cable sheath comprises the following components by weight: 70 parts of ethylene-vinyl acetate resin, 25 parts of linear low-density polyethylene, 10 parts of abrasion resistant agent, 16 parts of flame retardant, 0.8 parts of antioxidant 1010 and 2 parts of montmorillonite.

[0026] The preparation of the wear-resistant agent comprises the following steps: adding 1 part of silicone powder and 1 part of lignin to 3 parts of ethanol, adding 0.5 parts of chlorosulfonated polyethylene rubber after uniform dispersion, reacting at 60° C. for 4 hours, concentrating the reaction system to remove ethanol, and drying in an oven to obtain the wear-resistant agent.

[0027] A wear-resistant and flame-retardant material for an optical cable sheath, the preparation process of which comprises the following steps: step 1: weighing ethylene-vinyl acetate resin, linear low-density polyethylene, wear-resistant agent, flame retardant, antioxidant 1010 and montmorillonite, vacuum drying them at 70°C for 14 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 150°C for 20 minutes, transferring the internally mixed material to a twin-screw extruder, extruding at 150°C, and granulating to obtain the wear-resistant and flame-retardant material for the optical cable sheath. Example 2

[0028] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following components by weight: 60 parts of ethylene-vinyl acetate resin, 20 parts of low-density polyethylene, 8 parts of abrasion resistant agent, 14 parts of flame retardant, 0.5 parts of antioxidant 168 and 1 part of zinc borate.

[0029] The preparation of the wear-resistant agent comprises the following steps: adding 1 part of silicone powder and 0.8 part of lignin to 3 parts of ethanol, adding 0.7 part of chlorosulfonated polyethylene rubber after uniform dispersion, reacting at 50° C. for 3 hours, concentrating the reaction system to remove ethanol, and drying in an oven to obtain the wear-resistant agent.

[0030] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following steps in preparation: step 1: weighing ethylene-vinyl acetate resin, low-density polyethylene, abrasion resistant agent, flame retardant, antioxidant 168 and zinc borate, vacuum drying them at 60°C for 16 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 160°C for 15 minutes, transferring the internally mixed material to a twin-screw extruder, extruding it at 155°C, and granulating it to obtain the wear-resistant and flame-retardant material for the optical cable sheath. Example 3

[0031] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following components by weight: 80 parts of ethylene-vinyl acetate resin, 30 parts of low-density polyethylene, 12 parts of abrasion resistant agent, 18 parts of flame retardant, 1 part of antioxidant 168, and 3 parts of zinc borate.

[0032] The preparation of the wear-resistant agent comprises the following steps: adding 1 part of silicone powder and 1.0 part of lignin to 3 parts of ethanol, adding 0.7 parts of chlorosulfonated polyethylene rubber after uniform dispersion, reacting at 50° C. for 3 hours, concentrating the reaction system to remove ethanol, and drying in an oven to obtain the wear-resistant agent.

[0033] A wear-resistant and flame-retardant material for an optical cable sheath, the preparation process of which comprises the following steps: step 1: weighing ethylene-vinyl acetate resin, low-density polyethylene, abrasion resistant agent, flame retardant, antioxidant 168, and montmorillonite, vacuum drying them at 80°C for 10 hours, and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 140°C for 30 minutes, transferring the internally mixed material to a twin-screw extruder, extruding it at 150°C, and granulating it to obtain the wear-resistant and flame-retardant material for the optical cable sheath.

[0034] Comparative Example 1 A wear-resistant and flame-retardant material for an optical cable sheath comprises the following components by weight: 70 parts of ethylene-vinyl acetate resin, 15 parts of linear low-density polyethylene, 10 parts of low-density polyethylene, 10 parts of abrasion resistant agent, 16 parts of ammonium polyphosphate, 0.8 parts of antioxidant 1010 and 2 parts of montmorillonite.

[0035] The preparation of the wear-resistant agent comprises the following steps: adding 1 part of silicone powder and 1 part of lignin to 3 parts of ethanol, adding 0.5 parts of chlorosulfonated polyethylene rubber after uniform dispersion, reacting at 60° C. for 4 hours, concentrating the reaction system to remove ethanol, and drying in an oven to obtain the wear-resistant agent.

[0036] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following steps in preparation: step 1: weighing ethylene-vinyl acetate resin, linear low-density polyethylene, abrasion resistant agent, ammonium polyphosphate, antioxidant 1010 and montmorillonite, vacuum drying them at 70°C for 14 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 150°C for 20 minutes, transferring the internally mixed material to a twin-screw extruder, extruding at 150°C, and granulating to obtain the wear-resistant and flame-retardant material for an optical cable sheath.

[0037] Comparative Example 2 A wear-resistant flame-retardant material for an optical cable sheath comprises the following components by weight: 70 parts of ethylene-vinyl acetate resin, 25 parts of linear low-density polyethylene, 5 parts of silicone powder, 5 parts of lignin, 16 parts of trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), 0.8 parts of antioxidant 1010, and 2 parts of montmorillonite.

[0038] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following steps in preparation: step 1: weighing ethylene-vinyl acetate resin, linear low-density polyethylene, a wear-resistant agent, trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), antioxidant 1010, montmorillonite, silicone powder and lignin, drying them under vacuum at 70°C for 14 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing it at 150°C for 20 minutes, transferring the internally mixed material to a twin-screw extruder, extruding it at 150°C, and granulating it to obtain the wear-resistant and flame-retardant material for the optical cable sheath.

[0039] Comparative Example 3 A wear-resistant flame-retardant material for an optical cable sheath comprises the following components by weight: 70 parts of ethylene-vinyl acetate resin, 25 parts of linear low-density polyethylene, 7 parts of silicone powder, 3.5 parts of chlorosulfonated polyethylene rubber, 16 parts of trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), 0.8 parts of antioxidant 1010, and 2 parts of montmorillonite.

[0040] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following steps in preparation: step 1: weighing ethylene-vinyl acetate resin, linear low-density polyethylene, a wear-resistant agent, trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), antioxidant 1010 and montmorillonite, vacuum drying them at 70°C for 14 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 150°C for 20 minutes, transferring the internally mixed material to a twin-screw extruder, extruding at 150°C, and granulating to obtain the wear-resistant and flame-retardant material for the optical cable sheath.

[0041] Comparative Example 4 A wear-resistant flame-retardant material for an optical cable sheath comprises the following components by weight: 70 parts of ethylene-vinyl acetate resin, 25 parts of linear low-density polyethylene, 7 parts of lignin, 3.5 parts of chlorosulfonated polyethylene rubber, 16 parts of trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), 0.8 parts of antioxidant 1010, and 2 parts of montmorillonite.

[0042] A wear-resistant and flame-retardant material for an optical cable sheath comprises the following steps in preparation: step 1: weighing ethylene-vinyl acetate resin, linear low-density polyethylene, a wear-resistant agent, trimethylsilyl 2-(diethoxyphosphoryl) acetate (CAS: 66130-90-3), antioxidant 1010 and montmorillonite, vacuum drying them at 70°C for 14 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 150°C for 20 minutes, transferring the internally mixed material to a twin-screw extruder, extruding at 150°C, and granulating to obtain the wear-resistant and flame-retardant material for the optical cable sheath.

[0043] Performance Testing Performance tests were performed on Examples 1 to 3 and Comparative Examples 1 to 4. The tensile strength and elongation at break were tested according to the test method provided in GB / T 1040.3-2006. The oxygen index was tested according to the test method provided in GBT 2406.2-2009. The wear resistance was tested according to the following method: each group of materials was tested on an Amsler wear tester, and the test coefficients were: grinding disc: ψ122 mm (ψ0.4 ft), rotation speed: 185 r / min, hardness: 58-60 HRC, surface roughness: Ra=0.4 µm, grinding time: 2 h, load: 30 kg, and the wear rate, i.e., the mass loss rate, was tested, as described in Table 1.

[0044] Table 1 Performance test

[0045] As can be seen from Table 1, compared with Comparative Examples 1 to 4, the mechanical properties, fire resistance and wear resistance of Examples 1 to 3 are significantly improved, which shows that the silicone powder, lignin and chlorosulfonated polyethylene rubber in the wear-resistant agent work synergistically, and the wear-resistant flame-retardant material for optical cable sheath prepared in combination with other materials has obvious beneficial effects; silicone powder is filled into the three-dimensional structure of lignin, and is further cross-linked with chlorosulfonated polyethylene rubber. Chlorosulfonated polyethylene rubber has highly active chlorosulfonyl groups, which are cross-linked with lignin and silicone powder. The main chain is a chemically stable saturated hydrocarbon, which is entangled with the saturated hydrocarbon main chain of ethylene-vinyl acetate resin and polyethylene resin. Therefore, the mechanical properties of the wear-resistant flame-retardant material for optical cable sheath can be further improved. Due to the synergistic effect of the components in the wear-resistant agent, it has good wear resistance and good compatibility. The flame retardant of the present invention has the dual effects of interface coupling of silicon oxygen bonds and molecular chain cross-linking, combines the chemical bonding of siloxane groups and fillers after hydrolysis and the interface reinforcement effect of organic functional groups, and utilizes the molecular bridge effect of C6 carbon chains to improve compatibility and stress transmission, thereby significantly improving the wear resistance and tensile strength of rubber. It can be seen from the results of comparative examples 1 to 4 that the silicone powder, lignin, and chlorosulfonated polyethylene rubber in the wear-resistant agent work synergistically to achieve good results.

[0046] Obviously, those skilled in the art may make several changes and modifications to the present invention without departing from the scope of protection of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wear-resistant flame-retardant material for optical cable sheath, characterized in that: The invention comprises the following components by weight: 60-80 parts of ethylene-vinyl acetate resin, 20-30 parts of polyethylene resin, 8-12 parts of anti-wear agent, 14-18 parts of flame retardant, 0.5-1 parts of antioxidant, and 1-3 parts of anti-dripping agent; the anti-wear agent comprises the following components: silicone powder, lignin, and chlorosulfonated polyethylene rubber; the structure of the flame retardant is 。 2. The wear-resistant and flame-retardant material for optical cable sheath according to claim 1, characterized in that: The preparation process of the flame retardant comprises the following steps: (1) under a nitrogen atmosphere, dimethylphosphonoacetic acid (20 mmol), 1.6-hexanediol (18-20 mmol), and p-toluenesulfonic acid (0.2-0.25 mmol) are added to toluene, and the mixture is reacted at 90-100° C. for 10-16 hours, and an intermediate 1 is obtained after treatment and purification; (2) the intermediate 1 and trimethylamine are added to chloroform, the mixture is stirred evenly, and trimethylchlorosilane is added dropwise to react for 10-16 hours, and the flame retardant is obtained after treatment and purification.

3. The wear-resistant and flame-retardant material for optical cable sheath according to claim 2, characterized in that: In step (1), the molar ratio of dimethylphosphonoacetic acid, 1,6-hexanediol and p-toluenesulfonic acid is 20:(18-20):(0.2-0.25).

4. The wear-resistant flame-retardant material for optical cable sheath according to claim 2, characterized in that: In step (2), the molar ratio of intermediate 1, trimethylamine and trimethylchlorosilane is 20: (40-50): (30-40).

5. The wear-resistant and flame-retardant material for optical cable sheath according to claim 1, characterized in that: The mass ratio of the silicone powder, lignin and chlorosulfonated polyethylene rubber is 1: (0.8-1.2): (0.5-0.7).

6. The wear-resistant and flame-retardant material for optical cable sheath according to claim 1, characterized in that: The polyethylene resin includes linear low density polyethylene and low density polyethylene.

7. The wear-resistant and flame-retardant material for optical cable sheath according to claim 1, characterized in that: The anti-dripping agent is one of montmorillonite and zinc borate; the antioxidant is one of antioxidant 1010 and antioxidant 168 or both.

8. The wear-resistant flame-retardant material for optical cable sheath according to claim 1, characterized in that: The melt index of the linear low-density polyethylene is 4-10 g / 10 min; the melt index of the low-density polyethylene is 4-10 g / 10 min.

9. The wear-resistant and flame-retardant material for optical cable sheath according to claim 1, characterized in that: Preparation method of the anti-wear agent The method comprises the following steps: adding silicone powder and lignin into ethanol, uniformly dispersing the mixture, adding chlorosulfonated polyethylene rubber, reacting the mixture at 50-70°C for 3-5h, and obtaining the wear-resistant agent after treatment.

10. The method for preparing the wear-resistant and flame-retardant material for optical cable sheath according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: step 1: weighing ethylene-vinyl acetate resin, polyethylene resin, anti-wear agent, flame retardant, antioxidant and anti-dripping agent, vacuum drying them at 60-80° C. for 10-16 hours and then mixing them evenly to obtain a prepared material; step 2: putting the prepared material into an internal mixer and internally mixing them at 140-160° C. for 15-30 minutes, transferring the internally mixed material to a twin-screw extruder, extruding at 150-155° C., and granulating to obtain a wear-resistant and flame-retardant material for an optical cable sheath.

Images