Environment-friendly low-smoke halogen-free rat-proof and termite-proof cable

Abstract

The invention discloses an environment-friendly low-smoke halogen-free rat-and-termite-proof cable, which comprises a conductor (1) and an outer sheath (9), a rat-and-termite-proof layer (6) is arranged between the conductor (1) and the outer sheath (9), the rat-and-termite-proof layer (6) takes polyolefin as a matrix, a rat-and-termite-proof additive is added into the matrix, and fibers are embedded into the matrix; the outer circle surface of the rat-and-ant-proof layer (6) is provided with a medicine powder wrapping layer (7), the medicine powder wrapping layer (7) is composed of a polyolefin sheath layer and rat-and-ant-proof medicine powder (8) which are spirally arranged, the polyolefin sheath layer forms an m-shaped cavity structure which is periodically arranged from the cross section, and the cavity structure is filled with the rat-and-ant-proof medicine powder (8). The material used in the invention is a low-smoke halogen-free material, is environment-friendly, adopts a multi-layer rat-proof and ant-proof structure, has a good effect, and can be well recycled.

Description

Technical Field

[0001] The invention belongs to the field of cables, and in particular relates to a rat and ant-proof cable. Background Art

[0002] Modern society is highly dependent on electricity, and power transmission is inseparable from power cables. However, during use, cables are subject to a variety of environmental damage, such as oxygen, heat, light, force, and chemical corrosion. These factors gradually impair the cable's performance and shorten its service life. In addition to environmental factors, cables are also susceptible to gnawing by termites, rats, and other insects. According to incomplete statistics, one-quarter of unexplained urban fires are caused by rats gnawing on wires and cables. The gnawing of rats and ants not only damages the cable's insulation, leading to safety hazards such as short circuits and leakage, but can also cause fires, seriously threatening people's lives and property.

[0003] The combustion of traditional cables is often accompanied by the production of large amounts of smoke. This smoke contains harmful substances such as halogen acid gases, which pollute the environment and cause significant harm to the human body. In indoor environments, a large number of deaths in fires are related to asphyxiation caused by thick smoke.

[0004] Some existing cable materials do not take into account the problem of rat and ant gnawing, and cannot effectively prevent rat and ant damage to the cables, thereby increasing the risk of cable failure and fire. Some cable materials perform poorly in flame retardancy and smoke suppression. When a fire occurs, they are easy to burn and produce a lot of smoke, which is not conducive to the evacuation of personnel and the implementation of fire rescue work.

[0005] To ensure the safe and stable operation of power systems, reduce the occurrence of fire accidents, and minimize the harm of fire to the environment and human health, society requires a cable material that is both rat-resistant, ant-resistant, UV-resistant, and highly flame-retardant. This cable material should not only meet environmental requirements but also possess excellent physical, mechanical, and electrical properties to adapt to various complex operating environments.

[0006] The existing technology is to apply a layer of rat and ant repellent on the outermost outer sheath layer, or to modify the outer sheath layer and add some rat and ant repellent substances (such as capsaicin) to repel rats and ants. The disadvantages of the existing technology are: the rat and ant repellent applied on the outermost layer will lose its effectiveness and decompose over time under rain or sun exposure, requiring supplementation, resulting in poor protection effect. In addition, only one layer can repel rats and ants. When the outer sheath loses its effectiveness, the rat and ant repellent function will be lost. Summary of the Invention

[0007] The technical problems to be solved by the present invention are: 1. The production cost of the existing rat and ant-proof cables on the market is high; 2. The existing rat-proof and ant-proof cables are not environmentally friendly enough; 3. The existing rat-proof and ant-proof cables do not last long; 4. The structure of ordinary cables is not compact enough.

[0008] In order to achieve the above objectives, the technical solution adopted by the present invention is: An environmentally friendly low-smoke, halogen-free, rat-ant-proof cable comprises a conductor (1) and an outer sheath (9); a rat-ant-proof layer (6) is provided between the conductor (1) and the outer sheath (9); the rat-ant-proof layer (6) has a polyolefin matrix, a rat-ant-proof additive is added to the matrix, and fibers are embedded therein.

[0009] The outer surface of the rat-ant-proof layer (6) is provided with a powder coating layer (7), which is composed of a spirally arranged polyolefin sheath layer and rat-ant-proof powder (8). From a cross-section, the polyolefin sheath layer forms an "m"-shaped periodically arranged cavity structure, and the rat-ant-proof powder (8) is filled in the cavity structure.

[0010] The layer structure of the cable from the inside to the outside is conductor (1), flame retardant tape (3), waterproof layer (4), steel tape armor (5), rat and ant proof layer (6), powder coating (7) and outer sheath (9).

[0011] The conductor (1) has a fan-shaped cross section. Each conductor (1) is covered with an insulating material (2). Three conductors (1) are twisted into a cable core. A layer of flame-retardant tape (3) is wrapped around the cable core. The insulating material (2) is a low-smoke, halogen-free, cross-linked polyolefin material.

[0012] The formula of the materials used for the rat and ant-proof layer (6) is as follows: in parts by mass, 75-85 parts of polyolefin resin matrix, 4-6 parts of dioctyl phthalate, 1-3 parts of dibutyltin, 1-3 parts of benzylamine benzoate, 1-3 parts of n-nonanoic acid vanillamide, 4-6 parts of tributyl phosphate, and 4-6 parts of distearyl thiodipropionate, wherein benzylamine benzoate and n-nonanoic acid vanillamide are used as rat and ant-proof additives.

[0013] The preparation process of the material used for the rat and ant-proof layer (6) is as follows: the polyolefin resin is placed in a forced air drying oven at 80-100°C for 2-3 hours, the moisture content is controlled to be ≤0.1%, benzylamine benzoate and n-nonanoic acid vanillamide are passed through a 200-mesh sieve to avoid agglomeration; distearyl thiodipropionate and tributyl phosphate are premixed in proportion to enhance the synergistic effect; Add the pretreated polyolefin resin, dioctyl phthalate and dibutyl tin into a high-speed mixer at a speed of 800-1000 r / min and mix for 5 minutes until uniformly dispersed. Add the flame retardant and antioxidant premix in two batches. Control the mixing temperature at 60-70°C to prevent the volatilization of tributyl phosphate. Finally, add the rat and ant repellent additive and use low-speed stirring (300 r / min) to avoid thermal decomposition of amide substances. Use co-rotating twin-screw extruder and segmented temperature control: Feed section: 140-160℃ Melt section: 180-190℃ Homogenization section: 190-200℃ Die temperature: 170-180℃ The extruded strip is cooled in a water tank and then cut into particles, the moisture content of which should be ≤0.05%, and the drying temperature is 80℃ / 4 hours.

[0014] The polyolefin sheath layer formula of the drug powder coating (7) is as follows: polyolefin resin matrix 85-95 parts by mass, dioctyl phthalate 1-3 parts, dibutyl tin 1-3 parts, benzylamine benzamide 1-3 parts, n-nonyl acid vanillyl amide 1-3 parts, and tributyl phosphate 1-3 parts.

[0015] The formula of the rat and ant repellent powder (8) is as follows: base material 46-54 parts by mass, bread powder 8-12 parts, chili powder 8-12 parts, talc powder 60-70 parts, mint essence 4-6 parts, clove essence 4-6 parts, rosemary essence 4-6 parts, lavender essence 4-6 parts, and garlic 4-6 parts; the ratio of the base material is as follows: hydroxyl oxazone 4-6 parts, talc powder 35-45 parts, and barium sulfate 18-22 parts.

[0016] The production process of the rat and ant repellent powder (8) includes: I. Base material preparation: hydroxyl oxazone and 30-mesh talc powder are poured into a conical mixer and mixed at a speed of 15-20 r / min for 10 minutes to disperse the hydroxyl oxazone by adsorption of the talc powder. Barium sulfate is added and the mixing is continued for 20 minutes to ensure that there are no lumps. Agglomerated particles are removed through an 80-mesh vibrating screen, and the mixture is sealed and stored in a dry container for later use; II. Prepare the materials according to the ratio and pretreat them: peel and slice the garlic, dry it in a hot air drying oven until it becomes brittle, and then grind it into a 60-mesh powder. Mix the essences with the talc powder at a ratio of 1:3, and let them stand for 24 hours to allow full adsorption; III. Final mixing: first mix the base material with the bread powder and chili powder, stir them with a V-shaped mixer for 8-12 minutes, then add the garlic powder and essences, and stir them thoroughly for 20-30 minutes. Finally, add the remaining talc powder, sieve it, and stir it at low speed for 5 minutes to produce the rat and ant repellent powder.

[0017] The outermost outer sheath (9) is made of a TPE-TPU elastomer composite layer; the production formula is: 30-70 parts of TPE and TPU, 5-30 parts of phosphate-modified POSS flame retardant, 1-30 parts of flame retardant, 1-30 parts of lubricant, 1-2 parts of antioxidant, 1-2 parts of anti-hydrolysis agent, 2-10 parts of matting agent, and 2-3 parts of capsaicin; the phosphate-modified POSS flame retardant is obtained by reacting glycidyl ether oxypropyl caged polysilsesquioxane, 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate and a catalyst in an organic solution; the flame retardant includes 0.5-10 parts of APP and 0.5-20 parts of aluminum hydroxide.

[0018] Beneficial effects of the present invention: 1. The conductor adopts fan-shaped structure, which reduces the outer diameter of the cable and makes the structure compact. 2. The materials used are low-smoke halogen-free materials, which are environmentally friendly.

[0019] 3. It adopts multi-layer anti-rat and ant structure with good effect.

[0020] 4. The materials are easy to recycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : Schematic diagram of the layer structure of the cable of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments of the present invention, but the scope of protection claimed is not limited to the description.

[0023] Example 1 1. The present invention achieves rat and ant proofing effects from both physical structure and chemical defense aspects. The cable layer structure from the inside to the outside is conductor 1, flame retardant tape 3, waterproof layer 4, steel tape armor 5, rat and ant proofing layer 6, powder coating 7 and outer sheath 9.

[0024] 2. Conductor 1 is twisted in a regular manner, and the shape of conductor 1 is fan-shaped, which can make the structure more compact. Three conductors 1 can be twisted into a cylindrical cable core.

[0025] 3. The conductor 1 is covered with an insulating material 2. The insulating material 2 is made of a low-smoke, halogen-free, and environmentally friendly cross-linked polyolefin material. It does not contain halogen elements and does not release toxic smoke when burned, so it is environmentally friendly.

[0026] 4. A layer of glass fiber tape is wrapped around the cable core as a flame retardant tape 3 to play a flame retardant role.

[0027] 5. A low-smoke, halogen-free polyolefin isolation layer is extruded outside the flame-retardant tape 3, which serves as a waterproof layer 4 and also has an isolation function.

[0028] 6. Double steel belt armor 5 is placed outside the waterproof layer 4 to withstand radial loads. When the cable is buried, it can bear most of the load and protect the cable core. When the installation environment requires vertical laying, the steel belt armor 5 can be replaced with steel wire armor to withstand axial loads.

[0029] 7. The outer layer of the armor 5 is a polyolefin anti-rat and ant layer 6. Polyolefin, the primary base material for the cable sheath, offers excellent electrical insulation, chemical stability, and processing properties. Biorepellents (such as capsaicin) are added to the polyolefin matrix to create a taste barrier, while embedded Kevlar fibers directly block penetration by rat and ant teeth.

[0030] The typical formula is (all proportions in this article are based on mass parts): 80 parts of polyolefin resin matrix, 5 parts of plasticizer (dioctyl phthalate), 2 parts of dibutyl tin, 2 parts of rat and ant repellent additives (2 parts of benzylamine benzoate, 2 parts of n-nonanoic acid vanillamide), 4 parts of flame retardant (tributyl phosphate), and 5 parts of antioxidant (distearate thiodipropionate).

[0031] The production process is as follows: 80 parts of polyolefin resin (such as polyethylene or polypropylene) are placed in a forced-air drying oven at 80-100°C for 2-3 hours, controlling the moisture content to ≤0.1%. The rodent-ant repellent additive (2 parts benzylamine benzoate and 2 parts vanillamide n-nonanoate) is passed through a 200-mesh sieve to prevent caking. An antioxidant (5 parts distearyl thiodipropionate) and a flame retardant (4 parts tributyl phosphate) are premixed in appropriate proportions to enhance the synergistic effect. The pretreated polyolefin resin, along with a plasticizer (5 parts dioctyl phthalate) and a stabilizer (2 parts dibutyltin) are added to a high-speed blender at 800-1000 rpm and mixed for 5 minutes until uniformly dispersed. The flame retardant and antioxidant premix are then added in two batches. The mixing temperature is controlled at 60-70°C to prevent volatilization of the tributyl phosphate. Finally, the rodent-ant repellent additive is added, stirring at a low speed (300 rpm) to prevent thermal decomposition of the amide.

[0032] Use co-rotating twin-screw extruder and segmented temperature control: Feeding section: 140-160℃ Melting stage: 180-190℃ Homogenization section: 190-200℃ Head temperature: 170-180℃ The extruded material strips are cooled in a water tank and then pelletized. The moisture content of the pellets must be ≤0.05%, and the drying temperature is 80℃ / 4 hours.

[0033] 8. Outside the rat-ant-proof layer 6 is the powder coating layer 7. The powder coating layer (7) is composed of a spirally arranged polyolefin sheath layer and rat-ant-proof powder (8). The polyolefin sheath layer adopts a hollow design. From the cross-section, the polyolefin sheath layer forms an "m"-shaped periodically arranged cavity structure. The rat-ant-proof powder is placed in the cavity structure. The polyolefin sheath layers that make up the cavity structure are connected to each other, but the middle powder is isolated from each other. When one of them is damaged, it will not affect the rat-ant-proof properties of other parts. The formula of the polyolefin sheath layer is: 90 parts of polyolefin resin matrix, 2 parts of plasticizer (dioctyl phthalate), 2 parts of dibutyl tin, 2 parts of rat-ant-proof additives (2 parts of benzylamine benzoate, 2 parts of n-nonanoic acid vanillamide), 2 parts of flame retardant (tributyl phosphate), The production process is as follows: 90 parts of polyolefin resin (high-density polyethylene or polypropylene is recommended) are placed in a forced air drying oven at 80-100°C for 3 hours, and the moisture content is controlled to be ≤0.1%. The rat and ant-proof additive (2 parts of benzylamine benzoate and 2 parts of n-nonanoic acid vanillamide) is sieved through 200 mesh to eliminate lumps.

[0034] A flame retardant (2 parts tributyl phosphate) and a plasticizer (2 parts dioctyl phthalate) were premixed. The plasticizer was used to reduce the flame retardant's viscosity and improve dispersibility. The dried polyolefin resin and 2 parts dibutyltin (heat stabilizer) were added to a high-speed mixer (1000 rpm). After mixing for 3 minutes, the premixed flame retardant-plasticizer system was added in two batches. The temperature was kept below 60°C to prevent volatilization of the tributyl phosphate. Finally, the rat and ant repellent additive was added in three batches, with a 2-minute interval between each batch. Low-speed stirring (400 rpm) was used to prevent friction-induced heat decomposition of the amide.

[0035] Use co-rotating twin-screw extruder with segmented temperature settings: Feeding section: 150-165℃ (adapting to high feeding requirements with high resin ratio) Melting section: 185-195℃ (DBT has the best thermal stability at this temperature) Homogenization stage: 195-205℃ (to ensure the complete melting and dispersion of the anti-rat and ant additive) Die head temperature: 175-180°C (balance melt fluidity and additive stability) The extruded material strips are water-cooled and then pelletized. The pellets are dried in a hot air circulation drying oven at 80℃ for 4 hours. The moisture content must be ≤0.03%.

[0036] The powder formula is: 50 parts of base material (base material ratio: 5 parts of hydroxyoxazolidinone, 40 parts of 30 mesh talc, 20 parts of barium sulfate), 10 parts of bread flour, 10 parts of chili powder, 5 parts of talc, 5 parts of mint essence, 5 parts of clove essence, 5 parts of rosemary essence, 5 parts of lavender essence, and 5 parts of garlic.

[0037] The production steps are: Material ratio (calculated by mass): Hydroxyoxazinone: 5 parts 30 mesh talcum powder: 40 parts Barium sulfate: 20 parts Pour the hydroxyoxazolidinone and 30-mesh talc into a conical mixer and mix them at a speed of 15-20 r / min for 10 minutes to disperse the hydroxyoxazolidinone 1 by utilizing the adsorption property of the talc.

[0038] Add the barium sulfate and continue mixing for 20 minutes to ensure there are no lumps.

[0039] The product was filtered through an 80-mesh vibrating sieve to remove agglomerated particles and stored in a sealed dry container for later use.

[0040] Base material: 50 parts (prepared) Bread flour: 10 parts Chili powder: 10 parts Talc (carrier): 60 parts Flavors (mint, clove, rosemary, lavender): 5+5+5+5=20 servings Fresh garlic: 5 parts (needs to be pre-processed) Peel and slice the garlic, then dehydrate in a 50°C hot air drying oven for 8 hours until crispy flakes. Grind into a 60-mesh fine powder using a grinder to prevent residual moisture from affecting stability. Mix the flavoring with talc in a 1:3 ratio and let it sit for 24 hours for full absorption.

[0041] The final mixture is as follows: first mix the base material with bread crumbs and chili powder, stir with a V-type mixer for 10 minutes, then add garlic powder and essence, stir thoroughly for 25 minutes, and finally add the remaining talcum powder, sieve and stir at low speed for 5 minutes to make the rat and ant repellent powder.

[0042] The prepared rat and ant-proof powder is filled into the polyolefin hollow structure.

[0043] 9. The outermost sheath 9 is made of a TPE-TPU elastomer composite layer, which fully utilizes its wear resistance and water resistance and is highly recyclable. The formulation is as follows: 30-70 parts each of TPE and TPU, 5-30 parts of a phosphate-modified POSS flame retardant (formed by reacting glycidyloxypropyl caged polysilsesquioxane, 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate, and a catalyst in an organic solution), 1-30 parts of a flame retardant (including 0.5-10 parts of APP and 0.5-20 parts of aluminum hydroxide), 1-30 parts of a lubricant (fatty acid), 1-2 parts of an antioxidant (hindered phenol antioxidant, hindered amine antioxidant, phosphate antioxidant), 1-2 parts of an anti-hydrolysis agent (carbodiimide anti-hydrolysis agent, isocyanate anti-hydrolysis agent, or epoxy anti-hydrolysis agent), 2-10 parts of a matting agent, and 2-3 parts of capsaicin.

[0044] The preparation process is as follows: first, TPE and TPU are pretreated and vacuum-dried at 80-100°C for 2-4 hours to remove moisture. At the same time, each component is accurately weighed to ensure that TPE and TPU are 30-70 parts each, and phosphate-modified POSS flame retardant (obtained by reacting glycidyl ether oxypropyl caged polysilsesquioxane, 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate and a catalyst in an organic solution) is 5-30 parts. The following ingredients are included: flame retardant (including 0.5-10 parts APP and 0.5-20 parts aluminum hydroxide, for a total of 1-30 parts), lubricant (fatty acid) 1-30 parts, antioxidant (hindered phenol antioxidant, hindered amine antioxidant, phosphate antioxidant) 1-2 parts, anti-hydrolysis agent (carbodiimide anti-hydrolysis agent, isocyanate, epoxy anti-hydrolysis agent) 1-2 parts, matting agent 2-10 parts, and capsaicin 2-3 parts. The weighing error should be controlled within ±0.5%. Next, dry-blend the powder additives with the TPE and TPU pellets in a high-speed mixer for 5-10 minutes. The mixture is then melt-blended in a twin-screw extruder. The feeding zone temperature is controlled at 160-180°C, the shear zone at 200-220°C, and the discharge zone at 180-200°C. The screw speed is 200-400 rpm. The melt temperature is also controlled to not exceed 250°C to prevent material decomposition. Then granulation is carried out, and the melt is cut into particles with a particle size of 3-5 mm by an underwater pelletizer. Finally, the particles are annealed in an oven at 60-80°C for 2 hours to eliminate internal stress and obtain the final plastic particles.

Claims

1. An environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable, comprising a conductor (1) and an outer sheath (9), characterized in that: An anti-rat and ant layer (6) is provided between the conductor (1) and the outer sheath (9). The anti-rat and ant layer (6) is based on polyolefin, an anti-rat and ant additive is added to the matrix and fibers are embedded therein.

2. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 1, characterized in that: The outer surface of the rat-ant-proof layer (6) is provided with a powder coating layer (7), which is composed of a spirally arranged polyolefin sheath layer and rat-ant-proof powder (8). From a cross-section, the polyolefin sheath layer forms an "m"-shaped periodically arranged cavity structure, and the rat-ant-proof powder (8) is filled in the cavity structure.

3. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 2, characterized in that: The layer structure of the cable from the inside to the outside is conductor (1), flame retardant tape (3), waterproof layer (4), armor (5), rat and ant proof layer (6), powder coating (7) and outer sheath (9).

4. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 3, characterized in that: The conductor (1) has a fan-shaped cross section. Each conductor (1) is covered with an insulating material (2). Three conductors (1) are twisted into a cable core. A layer of flame-retardant tape (3) is wrapped around the cable core. The insulating material (2) is a low-smoke, halogen-free, cross-linked polyolefin material.

5. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 1 is characterized in that The formula of the materials used for the rat and ant-proof layer (6) is as follows: in parts by mass, 75-85 parts of polyolefin resin matrix, 4-6 parts of dioctyl phthalate, 1-3 parts of dibutyltin, 1-3 parts of benzylamine benzoate, 1-3 parts of n-nonanoic acid vanillamide, 4-6 parts of tributyl phosphate, and 4-6 parts of distearyl thiodipropionate, wherein benzylamine benzoate and n-nonanoic acid vanillamide are used as rat and ant-proof additives.

6. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 5, characterized in that The preparation process of the material used for the rat and ant-proof layer (6) is as follows: the polyolefin resin is placed in a forced air drying oven at 80-100°C for 2-3 hours, the moisture content is controlled to be ≤0.1%, benzylamine benzoate and n-nonanoic acid vanillamide are passed through a 200-mesh sieve to avoid agglomeration; distearyl thiodipropionate and tributyl phosphate are premixed in proportion to enhance the synergistic effect; Add the pretreated polyolefin resin, dioctyl phthalate and dibutyl tin into a high-speed mixer at a speed of 800-1000 r / min and mix for 5 minutes until uniformly dispersed. Add the flame retardant and antioxidant premix in two batches. Control the mixing temperature at 60-70°C to prevent the volatilization of tributyl phosphate. Finally, add the rat and ant repellent additive and use low-speed stirring (300 r / min) to avoid thermal decomposition of amide substances. Use co-rotating twin-screw extruder and segmented temperature control: Feeding section: 140-160℃ Melting stage: 180-190℃ Homogenization section: 190-200℃ Head temperature: 170-180℃ The extruded material strips are cooled in a water tank and then pelletized. The moisture content of the pellets must be ≤0.05%, and the drying temperature is 80℃ / 4 hours.

7. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 2, characterized in that The polyolefin sheath layer of the powder coating (7) is formulated as follows: in parts by mass, 85-95 parts of polyolefin resin matrix, 1-3 parts of dioctyl phthalate, 1-3 parts of dibutyltin, 1-3 parts of benzylamine benzoate, 1-3 parts of n-nonanoic acid vanillamide, and 1-3 parts of tributyl phosphate.

8. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 2, characterized in that The formula of the rat and ant repellent powder (8) is as follows: by weight, 46-54 parts of base material, 8-12 parts of bread crumbs, 8-12 parts of chili powder, 60-70 parts of talcum powder, 4-6 parts of mint essence, 4-6 parts of clove essence, 4-6 parts of rosemary essence, 4-6 parts of lavender essence, and 4-6 parts of garlic; wherein the proportion of the base material is as follows: 4-6 parts of hydroxyoxanthone, 35-45 parts of talcum powder, and 18-22 parts of barium sulfate.

9. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 8, characterized in that The production process of rat and ant repellent powder (8) includes:

1. Preparation of base material: Pour hydroxyoxazolidinone and 30-mesh talc into a conical mixer and mix at 15-20 r / min for 10 minutes. Use the adsorption property of talc to disperse hydroxyoxazolidinone. Add barium sulfate and continue mixing for 20 minutes to ensure that there is no agglomeration. Remove agglomerated particles through an 80-mesh vibrating sieve and store in a sealed dry container for later use.

2. Prepare the ingredients according to the ratio and perform pretreatment: peel and slice the garlic, spread it in a hot air drying oven to dehydrate it until it is crispy, grind it into 60 mesh fine powder with a crusher, mix the essence and talcum powder in a ratio of 1:3, and let it stand for 24 hours for full absorption; 3. Final mixing: First mix the base with bread crumbs and chili powder, stir with a V-type mixer for 8-12 minutes, then add garlic powder and essence, stir thoroughly for 20-30 minutes, and finally add the remaining talcum powder, sieve and stir at low speed for 5 minutes to make the rat and ant repellent powder.

10. The environmentally friendly low-smoke, halogen-free, rat- and ant-proof cable according to claim 1, characterized in that: The outermost outer sheath (9) is made of a TPE-TPU elastomer composite layer; the production formula is: 30-70 parts each of TPE and TPU, 5-30 parts of phosphate modified POSS flame retardant, 1-30 parts of flame retardant, 1-30 parts of lubricant, 1-2 parts of antioxidant, 1-2 parts of anti-hydrolysis agent, 2-10 parts of matting agent, and 2-3 parts of capsaicin; The phosphate-modified POSS flame retardant is obtained by reacting glycidyl ether oxypropyl caged polysilsesquioxane, 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate and a catalyst in an organic solution; the flame retardant comprises 0.5-10 parts of APP and 0.5-20 parts of aluminum hydroxide.

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