Environment-friendly cable material with high flame retardant property and preparation method thereof

Abstract

The invention discloses an environment-friendly cable material with high flame retardant property and a preparation method thereof, and the environment-friendly cable material with high flame retardant property comprises the following components by mass: 50-60 parts of polyvinyl chloride resin; 15-25 parts of an environment-friendly plasticizer; 3-7 parts of a flame retardant; 10 to 20 parts of a lubricant; 0.5 to 1.5 parts of an antioxidant; 2-4 parts of a stabilizer; 1-5 parts of an anti-ultraviolet agent; aluminum hydroxide micro powder is adopted as a flame retardant, aluminum hydroxide absorbs a large amount of heat and reduces the surface temperature of the material when being heated and decomposed, meanwhile, water vapor and non-combustible gas generated by decomposition can dilute the concentration of combustible gas and weaken the combustion reaction, and aluminum oxide generated by decomposition covers the surface of the material to isolate oxygen from being in contact with combustible substances; therefore, the flame-retardant and smoke-suppression effects are achieved, fire disasters can be effectively prevented, and fire hazard hazards are reduced. All the raw materials meet the environment-friendly requirement, are environment-friendly and pollution-free, do not cause harm to the environment and are good in environment-friendly performance.

Description

Technical Field

[0001] The invention belongs to the technical field of cable materials, and specifically relates to an environmentally friendly cable material with high flame retardancy and a preparation method thereof. Background Art

[0002] With the development of the electrical industry, the demand for wires and cables has increased, and the performance requirements for them are also constantly increasing. Traditional cable materials often have problems with insufficient flame retardancy or contain harmful substances, which are difficult to meet the requirements of modern electrical safety, causing environmental pollution and posing a threat to people's lives and property. Therefore, it is particularly important to develop a cable material with high flame retardancy and environmental protection.

[0003] Based on this, an environmentally friendly cable material with high flame retardancy and a preparation method thereof are designed. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an environmentally friendly cable material with high flame retardancy and a preparation method thereof, which effectively solves the problems raised in the above background.

[0005] To achieve the above object, the present invention provides the following technical solution: an environmentally friendly cable material with high flame retardancy, comprising the following components by mass:

[0006] Polyvinyl chloride resin: 50-60 parts;

[0007] Environmentally friendly plasticizer: 15-25 parts;

[0008] Flame retardant: 3-7 parts;

[0009] Lubricant: 10-20 parts;

[0010] Antioxidant: 0.5-1.5 parts;

[0011] Stabilizer: 2-4 parts;

[0012] Anti-ultraviolet agent: 1-5 parts.

[0013] Preferably, the environmentally friendly plasticizer is epoxidized soybean oil;

[0014] The flame retardant is aluminum hydroxide powder;

[0015] The lubricant is silicone;

[0016] The antioxidant is 1010 antioxidant;

[0017] The stabilizer is calcium zinc stabilizer;

[0018] The UV stabilizer is chlorinated polyethylene.

[0019] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0020] S1. Preparation of flame retardant

[0021] S1.1, dissolution of aluminum hydroxide: add aluminum hydroxide and liquid alkali into a reactor in a mass ratio of 6-9:2-3, heat to 80-100°C, dissolve aluminum hydroxide completely in the liquid alkali to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution;

[0022] S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 6-9:1-2, and ball milled to prepare active aluminum hydroxide seed crystals;

[0023] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 65-75°C, the stirring time is 210-270min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. The filtered material is then washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0024] Then, 1-3 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 5-10 parts by weight of propanol is added, stirred for 30-40 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0025] S2. Raw material mixing

[0026] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0027] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0028] S3. Melt blending

[0029] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0030] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0031] S4, granulation and cooling

[0032] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0033] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0034] S5. Drying and sieving

[0035] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0036] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0037] Preferably, in said S1.2, in the preparation of the active aluminum hydroxide seed crystals, the ball milling treatment time is 20-40 min.

[0038] Preferably, in S3.1, the temperature of the twin-screw extruder is 160-180°C, and the screw speed is 200-300r / min.

[0039] Preferably, in S5.1, the drying temperature is 60-80° C., and the drying time is 30-45 min.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The present invention uses aluminum hydroxide powder as a flame retardant. When aluminum hydroxide is decomposed by heat, it absorbs a large amount of heat, reduces the surface temperature of the material, and the water vapor and non-combustible gas generated by the decomposition can dilute the concentration of the combustible gas and weaken the combustion reaction. The aluminum oxide generated by the decomposition covers the surface of the material, isolating the contact between oxygen and the combustible substance, thereby playing a role in flame retardancy and smoke suppression, which can effectively prevent the occurrence of fire and reduce the fire hazard;

[0042] 2. All raw materials of the present invention meet environmental protection requirements, do not contain harmful substances such as heavy metals and brominated flame retardants, are environmentally friendly and pollution-free, will not cause harm to the environment, and have good environmental performance;

[0043] 3. The cable material has excellent heat resistance and chemical stability, which prolongs the service life of the cable and has broad application prospects. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] The present invention provides an environmentally friendly cable material with high flame retardancy, comprising the following components in parts by mass:

[0046] Polyvinyl chloride resin: 50-60 parts;

[0047] Environmentally friendly plasticizer: 15-25 parts;

[0048] Flame retardant: 3-7 parts;

[0049] Lubricant: 10-20 parts;

[0050] Antioxidant: 0.5-1.5 parts;

[0051] Stabilizer: 2-4 parts;

[0052] Anti-ultraviolet agent: 1-5 parts.

[0053] The environmentally friendly plasticizer in this embodiment is epoxidized soybean oil, which is flame retardant, weather resistant and environmentally friendly.

[0054] The flame retardant is aluminum hydroxide powder; when aluminum hydroxide is decomposed by heat, it absorbs a lot of heat and reduces the surface temperature of the material. At the same time, the water vapor and non-combustible gas produced by the decomposition can dilute the concentration of combustible gas and weaken the combustion reaction. The aluminum oxide produced by the decomposition covers the surface of the material, isolating the contact between oxygen and combustible substances, thereby playing a role in flame retardancy and smoke suppression; aluminum hydroxide has a very high dielectric constant and insulation performance, which can prevent current leakage in the cable and improve the insulation performance of the cable; aluminum hydroxide can form a three-dimensional network structure in the cable material, increase the strength and toughness of the cable material, and improve the bendability and impact resistance of the cable;

[0055] The lubricant is silicone; in addition to its lubrication function, silicone also has excellent high and low temperature resistance, electrical insulation and chemical stability. The waterproof performance of silicone is also breathable, which can remove moisture in time to avoid accumulation and leakage;

[0056] The antioxidant is 1010 antioxidant; 1010 antioxidant has excellent thermal stability and can protect cable materials from thermal oxidation degradation under high temperature conditions, thereby extending the service life of the cable; it can effectively prevent the discoloration of cable materials caused by light and heat, and maintain the beautiful appearance and stable performance of the cable;

[0057] The stabilizer is calcium zinc stabilizer; it is environmentally friendly and non-toxic, and can improve the fluidity and processing performance of cable materials; it can absorb and disperse heat during cable processing to prevent the material from decomposing at high temperatures, thereby improving the thermal stability of the cable; it can absorb ultraviolet rays, prevent degradation and aging caused by ultraviolet radiation, and enhance the cable's resistance to ultraviolet rays; calcium zinc stabilizer can inhibit the reaction of cable materials with oxygen, preventing degradation caused by oxidation reactions;

[0058] The anti-ultraviolet agent is chlorinated polyethylene; chlorinated polyethylene has excellent weather resistance and UV resistance, which can effectively prevent ultraviolet damage to the cable and extend the service life of the cable.

[0059] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0060] S1. Preparation of flame retardant

[0061] S1.1, dissolution of aluminum hydroxide: add aluminum hydroxide and liquid alkali into a reactor in a mass ratio of 6-9:2-3, heat to 80-100°C, dissolve aluminum hydroxide completely in the liquid alkali to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution;

[0062] S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 6-9:1-2, and ball milled to prepare active aluminum hydroxide seed crystals;

[0063] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 65-75°C, the stirring time is 210-270min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. The filtered material is then washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0064] Then, 1-3 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 5-10 parts by weight of propanol is added, stirred for 30-40 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0065] S2. Raw material mixing

[0066] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0067] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0068] S3. Melt blending

[0069] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0070] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0071] S4, granulation and cooling

[0072] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0073] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0074] S5. Drying and sieving

[0075] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0076] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0077] In S1.2 of this embodiment, in the preparation of active aluminum hydroxide seed crystals, the ball milling time is 20-40 minutes.

[0078] In S3.1 of this embodiment, the temperature of the twin-screw extruder is 160-180° C., and the screw speed is 200-300 r / min.

[0079] In S5.1 of this embodiment, the drying temperature is 60-80° C. and the drying time is 30-45 min.

[0080] Embodiment 1:

[0081] An environmentally friendly cable material with high flame retardancy, comprising the following components by mass:

[0082] Polyvinyl chloride resin: 50 parts;

[0083] Environmentally friendly plasticizer: 15 parts;

[0084] Flame retardant: 3 parts;

[0085] Lubricant: 10 parts;

[0086] Antioxidant: 0.5 parts;

[0087] Stabilizer: 2 parts;

[0088] Anti-ultraviolet agent: 1 part.

[0089] The environmentally friendly plasticizer in this embodiment is epoxidized soybean oil;

[0090] The flame retardant is aluminum hydroxide powder;

[0091] The lubricant is silicone;

[0092] The antioxidant is 1010 antioxidant;

[0093] The stabilizer is calcium zinc stabilizer;

[0094] The UV stabilizer is chlorinated polyethylene.

[0095] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0096] S1. Preparation of flame retardant

[0097] S1.1. Dissolution of aluminum hydroxide: Add aluminum hydroxide and liquid alkali into a reactor at a mass ratio of 6:2, heat to 80°C, and completely dissolve the aluminum hydroxide in the liquid alkali to form a sodium aluminate solution. Then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution.

[0098] S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 6:1, and ball milled to prepare active aluminum hydroxide seed crystals;

[0099] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 65 ° C, the stirring time is 210 min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. Then the filtered material is washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0100] Then, 1 part by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 5 parts by weight of propanol is added, stirred for 30 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0101] S2. Raw material mixing

[0102] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0103] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0104] S3. Melt blending

[0105] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0106] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0107] S4, granulation and cooling

[0108] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0109] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0110] S5. Drying and sieving

[0111] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0112] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0113] In S1.2 of this embodiment, in the preparation of active aluminum hydroxide seed crystals, the ball milling time is 20 minutes.

[0114] In S3.1 of this embodiment, the temperature of the twin-screw extruder is 160° C., and the screw speed is 200 r / min.

[0115] In S5.1 of this embodiment, the drying temperature is 60° C. and the drying time is 30 min.

[0116] Embodiment 2:

[0117] An environmentally friendly cable material with high flame retardancy, comprising the following components by mass:

[0118] Polyvinyl chloride resin: 60 parts;

[0119] Environmentally friendly plasticizer: 25 parts;

[0120] Flame retardant: 7 parts;

[0121] Lubricant: 20 parts;

[0122] Antioxidant: 1.5 parts;

[0123] Stabilizer: 4 parts;

[0124] Anti-ultraviolet agent: 5 parts.

[0125] The environmentally friendly plasticizer in this embodiment is epoxidized soybean oil;

[0126] The flame retardant is aluminum hydroxide powder;

[0127] The lubricant is silicone;

[0128] The antioxidant is 1010 antioxidant;

[0129] The stabilizer is calcium zinc stabilizer;

[0130] The UV stabilizer is chlorinated polyethylene.

[0131] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0132] S1. Preparation of flame retardant

[0133] S1.1. Dissolution of aluminum hydroxide: Add aluminum hydroxide and liquid alkali into a reactor at a mass ratio of 9:3, heat to 100°C, dissolve aluminum hydroxide completely in the liquid alkali to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution;

[0134] S1.2, preparation of active aluminum hydroxide seed crystals: placing aluminum hydroxide and water in a horizontal ball mill at a mass ratio of 9:2, and performing ball milling treatment to prepare active aluminum hydroxide seed crystals;

[0135] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 75 ° C, the stirring time is 270 min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. Then the filtered material is washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0136] Then, 3 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 10 parts by weight of propanol is added, stirred for 40 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0137] S2. Raw material mixing

[0138] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0139] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0140] S3. Melt blending

[0141] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0142] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0143] S4, granulation and cooling

[0144] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0145] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0146] S5. Drying and sieving

[0147] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0148] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0149] In S1.2 of this embodiment, in the preparation of active aluminum hydroxide seed crystals, the ball milling time is 40 minutes.

[0150] In S3.1 of this embodiment, the temperature of the twin-screw extruder is 180° C., and the screw speed is 300 r / min.

[0151] In S5.1 of this embodiment, the drying temperature is 80° C. and the drying time is 45 minutes.

[0152] Embodiment 3:

[0153] An environmentally friendly cable material with high flame retardancy, comprising the following components by mass:

[0154] Polyvinyl chloride resin: 55 parts;

[0155] Environmentally friendly plasticizer: 20 parts;

[0156] Flame retardant: 5 parts;

[0157] Lubricant: 15 parts;

[0158] Antioxidant: 1 part;

[0159] Stabilizer: 3 parts;

[0160] Anti-ultraviolet agent: 3 parts.

[0161] The environmentally friendly plasticizer in this embodiment is epoxidized soybean oil;

[0162] The flame retardant is aluminum hydroxide powder;

[0163] The lubricant is silicone;

[0164] The antioxidant is 1010 antioxidant;

[0165] The stabilizer is calcium zinc stabilizer;

[0166] The UV stabilizer is chlorinated polyethylene.

[0167] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0168] S1. Preparation of flame retardant

[0169] S1.1, dissolution of aluminum hydroxide: add aluminum hydroxide and liquid alkali in a mass ratio of 7.5:2.5 into a reactor, heat to 90°C, dissolve aluminum hydroxide in the liquid alkali completely to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution;

[0170] S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 7.5:1.5, and ball milled to prepare active aluminum hydroxide seed crystals;

[0171] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 70°C, the stirring time is 240min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. The filtered material is then washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0172] Then, 2 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the aluminum hydroxide semi-finished product to perform surface modification. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 7.5 parts by weight of propanol is added, stirred for 35 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0173] S2. Raw material mixing

[0174] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0175] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0176] S3. Melt blending

[0177] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0178] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0179] S4, granulation and cooling

[0180] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0181] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0182] S5. Drying and sieving

[0183] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0184] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0185] In S1.2 of this embodiment, in the preparation of the activated aluminum hydroxide seed crystals, the ball milling time is 30 minutes.

[0186] In S3.1 of this embodiment, the temperature of the twin-screw extruder is 170° C., and the screw speed is 250 r / min.

[0187] In S5.1 of this embodiment, the drying temperature is 70° C. and the drying time is 37.5 min.

[0188] Embodiment 4:

[0189] An environmentally friendly cable material with high flame retardancy, comprising the following components by mass:

[0190] Polyvinyl chloride resin: 52 parts;

[0191] Environmentally friendly plasticizer: 17 parts;

[0192] Flame retardant: 4 parts;

[0193] Lubricant: 12 parts;

[0194] Antioxidant: 0.7 parts;

[0195] Stabilizer: 2.3 parts;

[0196] Anti-ultraviolet agent: 2 parts.

[0197] The environmentally friendly plasticizer in this embodiment is epoxidized soybean oil;

[0198] The flame retardant is aluminum hydroxide powder;

[0199] The lubricant is silicone;

[0200] The antioxidant is 1010 antioxidant;

[0201] The stabilizer is calcium zinc stabilizer;

[0202] The UV stabilizer is chlorinated polyethylene.

[0203] A method for preparing an environmentally friendly cable material with high flame retardancy comprises the following steps:

[0204] S1. Preparation of flame retardant

[0205] S1.1. Dissolution of aluminum hydroxide: Add aluminum hydroxide and liquid alkali into a reactor at a mass ratio of 7:2, heat to 85°C, dissolve aluminum hydroxide completely in the liquid alkali to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution;

[0206] S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 7:2, and ball milled to prepare active aluminum hydroxide seed crystals;

[0207] S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 8°C, the stirring time is 230min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. The filtered material is then washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product;

[0208] Then, 1-3 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 6 parts by weight of propanol is added, stirred for 33 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder;

[0209] S2. Raw material mixing

[0210] S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio;

[0211] S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed;

[0212] S3. Melt blending

[0213] S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder;

[0214] S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend;

[0215] S4, granulation and cooling

[0216] S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die;

[0217] S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment;

[0218] S5. Drying and sieving

[0219] S5.1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material;

[0220] S5.2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

[0221] In S1.2 of this embodiment, in the preparation of active aluminum hydroxide seed crystals, the ball milling time is 25 minutes.

[0222] In S3.1 of this embodiment, the temperature of the twin-screw extruder is 165° C., and the screw speed is 235 r / min.

[0223] In S5.1 of this embodiment, the drying temperature is 65° C. and the drying time is 35 min.

[0224] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0225] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly cable material with high flame retardancy, characterized in that: It includes the following components by mass: Polyvinyl chloride resin: 50-60 parts; Environmentally friendly plasticizer: 15-25 parts; Flame retardant: 3-7 parts; Lubricant: 10-20 parts; Antioxidant: 0.5-1.5 parts; Stabilizer: 2-4 parts; Anti-ultraviolet agent: 1-5 parts.

2. The environmentally friendly cable material with high flame retardancy according to claim 1, characterized in that: The environmentally friendly plasticizer is epoxidized soybean oil; The flame retardant is aluminum hydroxide powder; The lubricant is silicone; The antioxidant is 1010 antioxidant; The stabilizer is calcium zinc stabilizer; The UV inhibitor is chlorinated polyethylene.

3. A method for preparing an environmentally friendly cable material with high flame retardancy, characterized in that: The following steps are involved: S1. Preparation of flame retardant S1.1, dissolution of aluminum hydroxide: add aluminum hydroxide and liquid alkali into a reactor in a mass ratio of 6-9:2-3, heat to 80-100°C, dissolve aluminum hydroxide completely in the liquid alkali to form a sodium aluminate solution, then filter the dissolved solution to remove undissolved impurities, and then centrifuge to further separate a pure sodium aluminate solution; S1.2, preparation of active aluminum hydroxide seed crystals: aluminum hydroxide and water are placed in a horizontal ball mill at a mass ratio of 6-9:1-2, and ball milled to prepare active aluminum hydroxide seed crystals; S1.3, preparation of aluminum hydroxide powder: add active aluminum hydroxide seeds to the prepared sodium aluminate solution while stirring, the seed rate is 5%, the reaction temperature is 65-75°C, the stirring time is 210-270min, and the solution is naturally settled and filtered to remove impurities and unreacted aluminum hydroxide. The filtered material is then washed with water for multiple times to remove residual alkali solution and impurities, and then the material is sent to a filter press for filter pressing to obtain an aluminum hydroxide semi-finished product; Then, 1-3 parts by weight of a surface modifier N-(β-aminoethyl)-α-aminopropyltrimethoxysilane is added to the above-mentioned aluminum hydroxide semi-finished product to perform surface modification treatment. The modified aluminum hydroxide has better dispersibility and compatibility. After being made into an aluminum hydroxide slurry, 0.2% of 3-glycidylpropyltrimethoxysilane dissolved in 5-10 parts by weight of propanol is added, stirred for 30-40 minutes, filtered and dried, and sieved to obtain aluminum hydroxide micropowder; S2. Raw material mixing S2.1, Raw material preparation: prepare chlorinated polyvinyl chloride resin, environmentally friendly plasticizer, flame retardant, lubricant, antioxidant, stabilizer, and anti-ultraviolet agent according to the above ratio; S2.2, mixing process: adding the prepared raw materials into a high-speed mixer and mixing them to make the materials evenly mixed; S3. Melt blending S3.1, raw material addition: add the mixed raw materials into the hopper of the twin-screw extruder; S3.2, melt blending: In a twin-screw extruder, the raw materials undergo a heating, shearing, and mixing process to form a melt blend; S4, granulation and cooling S4.1, granulation process: the molten blend is extruded from the outlet of the twin-screw extruder and formed into granules through a die; S4.2, cooling treatment: sending the extruded granular material into a cooling water tank for cooling treatment; S5. Drying and sieving S5.

1. Drying: The cooled granular material is sent to the dryer for drying to remove moisture from the material; S5.

2. Screening: The dried material is screened to remove particles and impurities that do not meet the requirements.

4. The method for preparing an environmentally friendly cable material with high flame retardancy according to claim 3, characterized in that: In the above-mentioned S1.2, in the preparation of the active aluminum hydroxide seed crystals, the ball milling treatment time is 20-40 minutes.

5. The method for preparing an environmentally friendly cable material with high flame retardancy according to claim 3, characterized in that: In S3.1, the temperature of the twin-screw extruder is 160-180° C., and the screw speed is 200-300 r / min.

6. The method for preparing an environmentally friendly cable material with high flame retardancy according to claim 3, characterized in that: In S5.1, the drying temperature is 60-80° C. and the drying time is 30-45 min.