Environment-friendly rubber-plastic fiber composite material for electric wire and cable and preparation method thereof

Abstract

The application discloses an environment-friendly rubber-plastic fiber composite material for electric wire and cable and a preparation method thereof, and comprises the following steps: FR-PVG powder is put into a kneader and heated and stirred, a coupling agent is sprayed, and surface modification treatment is conducted on the FR-PVG; the modified FR-PVG, polyvinyl chloride, chlorinated polyethylene, environment-friendly plasticizer, epoxy soybean oil, calcium-zinc composite stabilizer, tris(2-chloroethyl) phosphate and PE wax are added into a banbury mixer and mixed to obtain rubber-plastic fiber composite material pre-plasticized material; and the pre-plasticized material is subjected to a double-tapered screw extrusion granulator set to obtain the environment-friendly rubber-plastic fiber composite material for electric wire and cable; the environment-friendly rubber-plastic fiber composite material for electric wire and cable is prepared by taking waste rubber-plastic fabric whole-core flame-retardant conveying belts as a base body, has good flame-retardant performance, the mechanical performance meets the requirements of GB / T8815 "Soft polyvinyl chloride plastic for electric wire and cable" on HR-70 type PVC cable sheaths, and the cost is low and the material can be reused.

Description

Technical Field

[0001] This invention belongs to the field of waste polymer material recycling technology, specifically relating to an environmentally friendly rubber-plastic fiber composite material for wires and cables and its preparation method. Background Technology

[0002] Flame-retardant conveyor belts made of solid rubber and plastic fabric are the main tools for transporting coal in underground coal mines in my country, with an annual scrap volume of 400,000 tons. The basic components of waste flame-retardant conveyor belts made of solid rubber and plastic fabric (FR-PVG) are rubber, polyvinyl chloride (PVC), and fiber. The material properties are basically unchanged during use, and the recycling value is high. However, it is a difficult-to-recycle polymer composite material, and traditional technologies cannot achieve green recycling. It can only be disposed of by landfill or incineration, which not only causes major environmental problems, but also wastes a lot of resources and energy. How to recycle and utilize FR-PVG in a green, efficient, high-value, and large-scale manner is a pain point of social concern that has not yet been solved and urgently needs to be addressed.

[0003] Polyvinyl chloride (PVC) is the main material for making wires and cables. It has many advantages such as good corrosion resistance and electrical insulation properties, reusability, easy processing, and low cost.

[0004] Polyvinyl chloride (PVC) wires and cables, as well as their sheaths, are affordable and have good mechanical properties, making them easy to process and install. They have long been the most widely used material in the wire and cable industry. However, with the rapid development of my country's economy, the upgrading of the national power grid and the construction of infrastructure have placed increasingly higher demands on the quality of PVC wire and cable products, especially on environmental protection. The country is paying more and more attention to the issue of environmental protection, so people are more inclined to use environmentally friendly PVC wire and cable materials.

[0005] Currently, wires and cables are devices for transmitting electrical energy or signals, usually consisting of several conductors. Most wires and cables are buried underground, making them difficult to inspect and maintain. Therefore, the flame-retardant properties of wires and cables are very important.

[0006] The patent publication CN103709558A describes a method for preparing an environmentally friendly PVC wire and cable material. However, this patent does not use waste materials to prepare the material for wires and cables. Instead, it selects internationally recognized environmentally friendly materials to prepare the material for wires and cables.

[0007] Currently, there is no wire and cable material made using waste, non-renewable polymer materials as a matrix.

[0008] Therefore, an environmentally friendly rubber-plastic fiber composite material for wires and cables is proposed, which uses waste rubber and plastic fabric solid flame-retardant conveyor belt as the matrix. This environmentally friendly rubber-plastic fiber composite material has the characteristics of being environmentally friendly and low-cost, high-strength, and having good flame-retardant properties. Summary of the Invention

[0009] The purpose of this invention is to improve the flame retardant properties of environmentally friendly rubber and plastic fiber composite materials for wires and cables, and to prepare environmentally friendly rubber and plastic fiber composite materials for wires and cables using waste rubber and plastic fabric solid flame retardant conveyor belts as the matrix, thereby achieving green and efficient recycling. This invention proposes an environmentally friendly rubber and plastic fiber composite material for wires and cables and its preparation method.

[0010] The objective of this invention can be achieved through the following technical solution: an environmentally friendly rubber-plastic fiber composite material for wires and cables, comprising the following steps:

[0011] FR-PVG powder is put into a kneader, heated and stirred, and a coupling agent is sprayed to perform surface modification treatment on FR-PVG.

[0012] The surface-modified FR-PVG was mixed with polyvinyl chloride, chlorinated polyethylene, environmentally friendly plasticizer, epoxidized soybean oil, calcium-zinc composite stabilizer, tris(2-chloroethyl) phosphate and PE wax in a mixer to obtain a pre-plasticized rubber-plastic fiber composite material.

[0013] The above pre-plasticized material is processed through a twin-screw extrusion granulation unit to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0014] As a further aspect of the present invention: the FR-PVG powder is prepared by the following steps: cleaning the FR-PVG and cutting it into 200cm pieces. 2 The FR-PVG blocks of various sizes were crushed to obtain FR-PVG powder with a particle size of 60 mesh.

[0015] As a further aspect of the present invention: the kneader has a stirring speed of 340-350 rpm, and the coupling agent is sprayed after heating to 40℃-50℃. The kneader is then heated and stirred for 18-20 minutes at a temperature of 105℃-110℃.

[0016] As a further aspect of the present invention: the internal mixer rotor speed is 40-50 revolutions per minute, and the mixing is carried out at a temperature of 165℃-170℃ for 18-20 minutes.

[0017] As a further aspect of the present invention: the double-cone screw is used for extrusion granulation at a screw speed of 30-40 rpm and a temperature of 165℃-170℃.

[0018] As a further embodiment of the present invention, it comprises the following components in parts by weight: 45-55 parts of FR-PVG powder, 25-35 parts of polyvinyl chloride, 20 parts of chlorinated polyethylene, 15-25 parts of environmentally friendly plasticizer, 4-6 parts of epoxidized soybean oil, 4-6 parts of tris(2-chloroethyl) phosphate, 3-5 parts of calcium-zinc composite stabilizer, 3-5 parts of coupling agent, and 1 part of PE wax.

[0019] As a further aspect of the present invention: the environmentally friendly plasticizer is any one of trioctyl trimellitate, dinonyl phthalate, and dioctyl terephthalate; the coupling agent is any one of γ-glycidoxypropyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, and titanate coupling agent.

[0020] As a further aspect of the present invention, it also includes the following components in parts by weight: 80-85 parts of choline chloride, 80-85 parts of p-toluenesulfonic acid, and 8-10 parts of aromatic phosphorus.

[0021] As a further aspect of the present invention, the following steps are included: choline chloride and p-toluenesulfonic acid are placed in a mixer and heated to 60°C and stirred for 20-30 minutes to form a uniform and clear p-toluenesulfonic acid / choline chloride eutectic mixture, thereby obtaining the eutectic mixture;

[0022] FR-PVG powder was added to a eutectic mixture, then sonicated for 30 minutes and heated and stirred at 60-70℃ for 30-40 minutes. After the reaction was completed, the mixture was allowed to cool naturally to 20-30℃. The mixture was then filtered using a benchtop high-speed centrifuge, sonicated for 1 hour, washed with distilled water and dried. After drying, the mixture was pulverized to obtain the treated FR-PVG powder.

[0023] The treated FR-PVG powder was put into a kneader and heated and stirred at a speed of 340-350 rpm. The coupling agent was sprayed when the temperature reached 40℃-50℃. The heating and stirring continued for 18-20 minutes at a temperature of 105℃-110℃ to perform surface modification treatment on FR-PVG.

[0024] The surface-modified FR-PVG was mixed with polyvinyl chloride, chlorinated polyethylene, tris(2-chloroethyl) phosphate, aromatic phosphorus, dinonyl phthalate, epoxidized soybean oil, calcium-zinc composite stabilizer and PE wax in a mixer. The mixer rotor speed was 40-50 rpm, and the mixture was mixed at 165℃-170℃ for 18-20 minutes to obtain a pre-plasticized rubber-plastic fiber composite material.

[0025] As a further aspect of the present invention: the method for preparing the environmentally friendly rubber-plastic fiber composite material for wires and cables is as follows: FR-PVG powder is put into a kneader and heated and stirred to perform surface modification treatment on FR-PVG;

[0026] The surface-modified FR-PVG was mixed with polyvinyl chloride, chlorinated polyethylene, environmentally friendly plasticizer, epoxidized soybean oil, calcium-zinc composite stabilizer, tris(2-chloroethyl) phosphate and PE wax in a mixer to obtain a pre-plasticized rubber-plastic fiber composite material.

[0027] The above pre-plasticized material is processed through a twin-screw extrusion granulation unit to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0028] The beneficial effects of this invention are:

[0029] (1) Using waste rubber and plastic fabric solid flame retardant conveyor belt as the matrix to prepare environmentally friendly rubber and plastic fiber composite material for wires and cables, the environmental pollution problem caused by the treatment of FR-PVG is avoided; the green recycling and high-value utilization of FR-PVG is realized, and a new way of high-value, high-efficiency and green recycling of waste rubber and plastic fabric solid flame retardant conveyor belt in my country is innovated.

[0030] (2) The environmentally friendly rubber-plastic fiber composite material for wires and cables has good insulation performance, flame retardant performance and weather resistance. Its mechanical properties meet the requirements of GB / T8815 "Soft Polyvinyl Chloride Plastics for Wires and Cables" for HR-70 type PVC cable sheath. It is low in cost and can be reused.

[0031] (3) By degrading the cotton fibers in FR-PVG powder into cellulose powder, the polyester-cotton fibers in FR-PVG powder are separated into cellulose powder and polyester fibers, and tris(2-chloroethyl) phosphate can be better dispersed in polyester fibers and cellulose powder, which further improves the flame retardant properties of polyester fibers and pure cotton fibers.

[0032] (4) By combining tris(2-chloroethyl) phosphate with aromatic phosphorus, tris(2-chloroethyl) phosphate contains chloroethyl groups and aromatic phosphorus compounds contain phosphorus elements. The phosphorus compounds decompose at high temperatures and release phosphorus oxides. These oxides can interact with free radicals in combustion to form a protective layer that inhibits flame propagation. The introduction of chlorine elements can affect the gas phase reaction of combustion, prevent the spread of flame, and increase the flame retardant effect of environmentally friendly rubber and plastic fiber composite materials for wires and cables. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] An environmentally friendly rubber-plastic fiber composite material for wires and cables is prepared from the following components in parts by weight:

[0036] FR-PVG powder 45 parts, PVC (polyvinyl chloride) 35 parts, CPE (chlorinated polyethylene) 20 parts, environmentally friendly plasticizer 15 parts, ESO (epoxidized soybean oil) 6 parts, flame retardant 6 parts, Ca-Zn (calcium-zinc composite stabilizer) 3 parts, coupling agent 3 parts, PE wax 1 part.

[0037] The FR-PVG powder is made by crushing waste rubber and plastic fabric solid flame-retardant conveyor belt, with a particle size of 60 mesh.

[0038] The environmentally friendly plasticizer is trioctyl trimellitate (TOTM);

[0039] The coupling agent is γ-glycidyl oxypropyltrimethoxysilane (KH560);

[0040] The flame retardant is tris(2-chloroethyl) phosphate (TCEP);

[0041] The names and manufacturers of the raw materials used in the examples are shown in Table 1:

[0042] Table 1

[0043]

[0044]

[0045] The preparation method includes the following steps:

[0046] (1) Clean the FR-PVG thoroughly and cut it into 200cm pieces. 2 Block-shaped FR-PVG of various sizes;

[0047] (2) The blocky FR-PVG was crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0048] (3) Put FR-PVG powder into a kneader and heat and stir at a speed of 340 rpm. Heat to 40°C and start spraying KH560. Continue heating and stirring. Stir at 105°C for 18 minutes to perform surface modification treatment on FR-PVG.

[0049] (4) The surface-modified FR-PVG was added to a mixer along with PVC, CPE, TOTM, ESO, Ca-Zn, TCEP and PE wax and mixed in a mixer at a rotor speed of 40 rpm for 18 minutes at 165°C to obtain a pre-plasticized rubber-plastic fiber composite material.

[0050] (5) The above preplasticized material is extruded and granulated by a double cone screw extrusion granulator at a screw speed of 30 rpm and a temperature of 165°C to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0051] Example 2

[0052] An environmentally friendly rubber-plastic fiber composite material for wires and cables is prepared from the following components in parts by weight:

[0053] 50 parts FR-PVG powder, 30 parts PVC, 20 parts CPE, 20 parts DINP, 5 parts ESO, 5 parts TCEP, 4 parts Ca-Zn, 4 parts KH570, 1 part PE wax;

[0054] The FR-PVG powder is made by crushing waste rubber and plastic fabric solid flame-retardant conveyor belt, with a particle size of 60 mesh.

[0055] The environmentally friendly plasticizer is dinonyl phthalate (DINP);

[0056] The coupling agent is γ-methacryloyloxypropyltrimethoxysilane (KH570);

[0057] The preparation method includes the following steps:

[0058] (1) Clean the FR-PVG thoroughly and cut it into 200cm pieces. 2 Block-shaped FR-PVG of various sizes;

[0059] (2) The blocky FR-PVG was crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0060] (3) Put FR-PVG powder into a kneader and heat and stir at a speed of 345 rpm. Heat to 45°C and start spraying KH570. Continue heating and stirring. Stir at 108°C for 19 minutes to perform surface modification treatment on FR-PVG.

[0061] (4) The surface-modified FR-PVG was added to a mixer along with PVC, CPE, DINP, ESO, Ca-Zn, TCEP and PE wax and mixed in a mixer at a rotor speed of 45 rpm for 19 minutes at 168°C to obtain a pre-plasticized rubber-plastic fiber composite material.

[0062] (5) The above preplasticized material is extruded and granulated by a double cone screw extrusion granulator at a screw speed of 35 rpm and a temperature of 168°C to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0063] Example 3

[0064] An environmentally friendly rubber-plastic fiber composite material for wires and cables is prepared from the following components in parts by weight:

[0065] 55 parts FR-PVG powder, 25 parts PVC, 20 parts CPE, 25 parts DOTP, 4 parts ESO, 4 parts TCEP, 5 parts Ca-Zn, 4 parts NDZ, 1 part PE wax;

[0066] The FR-PVG powder is made by crushing waste rubber and plastic fabric solid flame-retardant conveyor belt, with a particle size of 60 mesh.

[0067] The environmentally friendly plasticizer is dioctyl terephthalate (DOTP);

[0068] The coupling agent is a titanate coupling agent (NDZ);

[0069] The preparation method includes the following steps:

[0070] (1) Clean the FR-PVG thoroughly and cut it into 200cm pieces. 2 Block-shaped FR-PVG of various sizes;

[0071] (2) The blocky FR-PVG was crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0072] (3) Put FR-PVG powder into a kneader and heat and stir at a speed of 350 rpm. Heat to 50°C and start spraying NDZ. Continue heating and stirring. Stir at 110°C for 20 minutes to perform surface modification treatment on FR-PVG.

[0073] (4) The surface-modified FR-PVG was added to a mixer along with PVC, CPE, DOTP, ESO, Ca-Zn, TCEP and PE wax and mixed in a mixer at a rotor speed of 50 rpm for 20 minutes at 170°C to obtain a pre-plasticized rubber-plastic fiber composite material.

[0074] (5) The above preplasticized material is extruded and granulated by a double cone screw extrusion granulator at a screw speed of 40 rpm and a temperature of 170°C to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0075] Example 4

[0076] An environmentally friendly rubber-plastic fiber composite material for wires and cables is prepared from the following components in parts by weight:

[0077] FR-PVG powder 45 parts, PVC (polyvinyl chloride) 35 parts, CPE (chlorinated polyethylene) 20 parts, environmentally friendly plasticizer 15 parts, ESO (epoxidized soybean oil) 6 parts, flame retardant 6 parts, Ca-Zn (calcium-zinc composite stabilizer) 3 parts, coupling agent 3 parts, PE wax 1 part.

[0078] Choline chloride 80 parts, p-toluenesulfonic acid 80 parts, aromatic phosphorus 8 parts;

[0079] The FR-PVG powder is made by crushing waste rubber and plastic fabric solid flame-retardant conveyor belt, with a particle size of 60 mesh.

[0080] The environmentally friendly plasticizer is dinonyl phthalate (DINP);

[0081] The coupling agent is γ-glycidyl oxypropyltrimethoxysilane (KH560);

[0082] The flame retardant is tris(2-chloroethyl) phosphate (TCEP);

[0083] The preparation method includes the following steps:

[0084] (1) Clean the FR-PVG thoroughly and cut it into 200cm pieces. 2 Block-shaped FR-PVG of various sizes;

[0085] (2) The blocky FR-PVG was crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0086] Because the products of the cracking of polyester and cotton fibers are mutually thermally induced, the spillage of cracking products is accelerated. Therefore, the ignition speed of polyester-cotton fibers is much faster than that of pure polyester and pure cotton fibers.

[0087] During combustion, flame retardants migrate between the polyester and cotton components, thus posing a challenge to the flame retardancy of polyester-cotton fiber products.

[0088] Because cotton is a non-melting and non-shrinking flammable fiber, when polyester-cotton products burn, the cotton fibers carbonize, which acts as a support for the polyester, similar to a candle wick, thus preventing the molten polyester droplets from leaving the fire source.

[0089] (3) Place choline chloride and p-toluenesulfonic acid in a mixer and heat to 60°C and stir for 20 minutes to form a uniform and clear p-toluenesulfonic acid / choline chloride eutectic mixture, and obtain the eutectic mixture;

[0090] Using p-toluenesulfonic acid as a hydrogen bond donor and choline chloride as a hydrogen bond acceptor, a low-melting solvent p-toluenesulfonic acid / choline chloride that is beneficial to the dissolution of cotton fibers is synthesized by heating and stirring. It forms a mixed solvent with water to form a reaction system.

[0091] (4) Add FR-PVG powder to the eutectic mixture, then sonicate it for 30 min, heat and stir it at 60°C for 30 min, and after the reaction is completed, cool it naturally to 20°C; filter it with a benchtop high-speed centrifuge, sonicate it for 1 h, then wash it with distilled water and dry it, and after drying, pulverize it to obtain the treated FR-PVG powder.

[0092] FR-PVG powder contains polyester-cotton fibers, which are also in powder form. This makes it easier to mix and disperse with eutectic solvents, promoting the combination of hydrogen bond donors and acceptors in the eutectic solvent to form a new eutectic mixture. This degrades the cotton fibers in the polyester-cotton fibers of FR-PVG powder into cellulose powder.

[0093] (5) The treated FR-PVG powder was put into a kneader and heated and stirred at a speed of 340 rpm. KH560 was sprayed when the temperature reached 40°C. The heating and stirring continued for 18 minutes at 105°C to perform surface modification treatment on FR-PVG.

[0094] (6) The surface-modified FR-PVG was added together with PVC, CPE, TCEP, aromatic phosphorus, DINP, ESO, Ca-Zn and PE wax into a mixer and mixed. The rotor speed of the mixer was 40 rpm and the mixture was mixed at 165°C for 18 minutes to obtain the pre-plasticized rubber-plastic fiber composite material.

[0095] Because the cotton fibers in the polyester-cotton fibers of FR-PVG powder are degraded into cellulose powder, the polyester-cotton fibers in FR-PVG powder are separated into cotton fibers and polyester fibers. Tris(2-chloroethyl) phosphate can be better dispersed in polyester fibers and pure cotton fibers, which further improves the flame retardant properties of polyester fibers and pure cotton fibers.

[0096] Tris(2-chloroethyl) phosphate is combined with aromatic phosphorus. Since TCEP contains chloroethyl groups and aromatic phosphorus compounds contain phosphorus elements, the phosphorus compounds decompose at high temperatures and release phosphorus oxides. These oxides can interact with free radicals in combustion to form a protective layer that inhibits flame propagation. The introduction of chlorine elements can affect the gas phase reaction of combustion, prevent flame spread, and increase its flame retardant effect.

[0097] The molecule of tris(2-chloroethyl) phosphate contains phosphorus, chlorine and ester bonds; the chloroethyl group interacts with PVC molecules, improving the arrangement of PVC molecules, making PVC plastic more flexible and easier to process; thus improving its plasticity.

[0098] (7) The above preplasticized material is extruded and granulated by a double cone screw extrusion granulator at a screw speed of 30 rpm and a temperature of 165°C to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

[0099] Example 5

[0100] An environmentally friendly rubber-plastic fiber composite material for wires and cables is prepared from the following components in parts by weight:

[0101] FR-PVG powder 55 parts, PVC 25 parts, CPE 20 parts, DINP 25 parts, ESO (epoxidized soybean oil) 4 parts, tris(2-chloroethyl) phosphate 4 parts, Ca-Zn 5 parts, NDZ 4 parts, PE wax 1 part;

[0102] Choline chloride 85 parts, p-toluenesulfonic acid 85 parts, aromatic phosphorus 10 parts;

[0103] The preparation method includes the following steps:

[0104] (1) Clean the FR-PVG thoroughly and cut it into 200cm pieces. 2 Block-shaped FR-PVG of various sizes;

[0105] (2) The blocky FR-PVG was crushed to obtain FR-PVG powder with a particle size of 60 mesh;

[0106] (3) Place choline chloride and p-toluenesulfonic acid in a mixer and heat to 60°C and stir for 30 minutes to form a uniform and clear p-toluenesulfonic acid / choline chloride eutectic mixture, and obtain the eutectic mixture;

[0107] (4) Add FR-PVG powder to the eutectic mixture, then sonicate it for 30 min, heat and stir it at 70°C for 40 min, and after the reaction is completed, cool it naturally to 30°C; filter it with a benchtop high-speed centrifuge, sonicate it for 1 h, then wash it with distilled water and dry it, and after drying, pulverize it to obtain the treated FR-PVG powder.

[0108] (5) The treated FR-PVG powder was put into a kneader and heated and stirred at a speed of 350 rpm. NDZ was sprayed when the temperature reached 50°C. The heating and stirring continued for 20 minutes at 110°C to perform surface modification treatment on FR-PVG.

[0109] (6) The surface-modified FR-PVG was added together with PVC, CPE, TCEP, aromatic phosphorus, DINP, ESO, Ca-Zn and PE wax into a mixer and mixed. The rotor speed of the mixer was 50 rpm and the mixture was mixed at 170°C for 20 minutes to obtain the pre-plasticized rubber-plastic fiber composite material.

[0110] (7) The above preplasticized material is extruded and granulated by a double cone screw extrusion granulator at a screw speed of 40 rpm and a temperature of 170°C to obtain an environmentally friendly rubber and plastic fiber composite material for wires and cables.

[0111] The performance of the samples from steps 1-5 was tested, and the test data are shown in Table 2.

[0112] Table 2

[0113]

[0114]

[0115] As shown in Table 2, all properties of Examples 1-5 meet the requirements of GB / T8815 "Soft Polyvinyl Chloride Plastics for Wires and Cables" for the sheath of HR-70 type PVC cables. Among them, the properties of Examples 4-5 are superior to those of Examples 1-3. The data shows that compared with Examples 1-3, the tensile strength, elongation at break, and oxygen index of Examples 4-5 are improved. This proves that the addition of tris(2-chloroethyl) phosphate and aromatic phosphorus to FR-PVG powder forms a protective layer that inhibits flame propagation through the interaction of oxides with free radicals in combustion. The introduction of chlorine can affect the gas phase reaction of combustion, prevent flame spread, and increase its flame retardant effect; it also improves its oxygen index. On the other hand, the pretreated FR-PVG powder degrades cotton fibers into cellulose powder, which allows tris(2-chloroethyl) phosphate to be better dispersed in polyester fibers and pure cotton fibers, further improving the flame retardant properties of polyester fibers and pure cotton fibers.

[0116] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An environmentally friendly rubber-plastic fiber composite material for wires and cables, characterized in that, Includes the following components by weight: FR-PVG powder 45-55 parts, polyvinyl chloride 25-35 parts, chlorinated polyethylene 20 parts, environmentally friendly plasticizer 15-25 parts, epoxidized soybean oil 4-6 parts, tris(2-chloroethyl) phosphate 4-6 parts, calcium-zinc composite stabilizer 3-5 parts, coupling agent 3-5 parts, PE wax 1 part. It also includes the following components in parts by weight: 80-85 parts of choline chloride, 80-85 parts of p-toluenesulfonic acid, and 8-10 parts of aromatic phosphorus; The preparation steps are as follows: Choline chloride and p-toluenesulfonic acid are placed in a mixer and heated to 60°C and stirred for 20-30 minutes to form a homogeneous and clear eutectic mixture of p-toluenesulfonic acid and choline chloride. FR-PVG powder was added to a eutectic mixture, then sonicated for 30 minutes and heated and stirred at 60-70℃ for 30-40 minutes. After the reaction was completed, the mixture was allowed to cool naturally to 20-30℃. The mixture was then filtered using a benchtop high-speed centrifuge, sonicated for 1 hour, washed with distilled water and dried. After drying, the mixture was pulverized to obtain the treated FR-PVG powder. The treated FR-PVG powder was put into a kneader and heated and stirred at a speed of 340-350 rpm. The coupling agent was sprayed when the temperature reached 40℃-50℃. The heating and stirring continued for 18-20 minutes at a temperature of 105℃-110℃ to perform surface modification treatment on FR-PVG. The surface-modified FR-PVG was mixed with polyvinyl chloride, chlorinated polyethylene, tris(2-chloroethyl) phosphate, aromatic phosphorus, dinonyl phthalate, epoxidized soybean oil, calcium-zinc composite stabilizer and PE wax in a mixer. The rotor speed of the mixer was 40-50 rpm, and the mixture was mixed at 165℃-170℃ for 18-20 minutes to obtain a pre-plasticized rubber-plastic fiber composite material. The above pre-plasticized material is processed through a twin-screw extrusion granulation unit to obtain an environmentally friendly rubber-plastic fiber composite material for wires and cables.

2. The environmentally friendly rubber-plastic fiber composite material for wires and cables according to claim 1, characterized in that: The FR-PVG powder is prepared by the following steps: cleaning the FR-PVG, cutting it into 200cm² blocks, crushing the blocks to obtain FR-PVG powder with a particle size of 60 mesh.

3. The environmentally friendly rubber-plastic fiber composite material for wires and cables according to claim 1, characterized in that: The kneader is set to a stirring speed of 340-350 rpm. The coupling agent is sprayed after heating to 40℃-50℃, and the mixture is heated and stirred for 18-20 minutes at 105℃-110℃.

4. The environmentally friendly rubber-plastic fiber composite material for wires and cables according to claim 1, characterized in that: The internal mixer rotor speed is 40-50 rpm, and the mixing is carried out at a temperature of 165℃-170℃ for 18-20 minutes.

5. The environmentally friendly rubber-plastic fiber composite material for wires and cables according to claim 1, characterized in that: The double-cone screw is used for extrusion granulation at a screw speed of 30-40 rpm and a temperature of 165℃-170℃.

6. The environmentally friendly rubber-plastic fiber composite material for wires and cables according to claim 1, characterized in that: The coupling agent is any one of γ-glycidoxypropyltrimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, and titanate coupling agents.

Images