High-transmittance pre-branching cable material and preparation method thereof
By using the synergistic effect of components such as vinyl silicone rubber and ferrocene in cable materials, combined with components such as magnesium hydroxide and phosphate esters, a high light transmittance pre-branched cable material was prepared, which solved the problems of excessive smoke and decreased light transmittance after combustion, and achieved a cable material with low smoke, high light transmittance and good performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU YITIAN TECH CO LTD
- Filing Date
- 2026-03-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing cable materials produce a large amount of smoke when burned, reducing light transmittance, posing a safety hazard, and affecting performance.
Vinyl silicone rubber and ferrocene are used as synergistic flame retardants. Combined with magnesium hydroxide, antimony trioxide and tri(butoxyethyl) phosphate, high light transmittance pre-branched cable material is prepared by mixing and extrusion granulation processes to form a dense siloxane protective layer, which reduces smoke generation and improves light transmittance.
It effectively reduces the amount of smoke generated by the cable material after combustion, maintains the cable's high light transmittance and performance stability, and has good flame retardant and mechanical properties.
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of cable materials, and in particular to a high light transmittance pre-branched cable material and its preparation method. Background Technology
[0002] Pre-branched cables are a new type of cable product where branch lines are prefabricated in a factory according to design drawings. They are mainly used in AC power supply systems such as building electrical shafts, tunnels, and airports. Their structure includes a main cable, branch lines, branch joints, and related accessories. The cable uses fully mechanized crimping technology to prefabricate branch joints, ensuring conductor continuity and contact resistance stability, and possesses core advantages such as shock resistance, airtightness, waterproofing, and fire resistance. Currently, cable materials cause severe fiber optic scattering and significantly interfere with light transmittance after combustion, posing a safety hazard. Therefore, there is a need for a cable material that produces less smoke and higher light transmittance after combustion, while maintaining the cable's inherent performance. Summary of the Invention
[0003] To reduce the smoke generated after the cable material is burned, this application provides a high light transmittance pre-branched cable material and its preparation method.
[0004] Firstly, this application provides a high light transmittance pre-branched cable material, which adopts the following technical solution: A high light transmittance pre-branched cable material, wherein the raw materials of the cable material include the following components in parts by weight: 25-55 parts of base resin, 1-8 parts of compatibilizer, 0.5-2.0 parts of masterbatch, 21-60 parts of flame retardant, 2.05-32 parts of synergistic flame retardant, 0.7-6.0 parts of dispersant, and 0.6-3 parts of antioxidant; wherein the synergistic flame retardant comprises a mixture of vinyl silicone rubber and ferrocene.
[0005] By adopting the above technical solutions, vinyl silicone rubber not only has synergistic flame retardancy, but also has advantages such as lubrication, demolding, and reduced smoke density; ferrocene can promote combustion and reduce smoke generation. Therefore, by using the combination of the two, the amount of smoke generated by the cable material after combustion is reduced.
[0006] In one specific implementation, the base resin comprises a mixture of EVA and LLDPE.
[0007] In one specific implementation, the method for preparing the flame retardant includes the following steps: γ-aminopropyltriethoxysilane, ethanol, and water are stirred and mixed evenly to obtain a spraying solution; Magnesium hydroxide and antimony trioxide are stirred and mixed evenly to obtain a mixture. During the stirring process, a spraying liquid is slowly sprayed into the mixture. After the spraying is completed, stirring is continued and the mixture is dried to obtain a flame retardant.
[0008] By adopting the above technical solution, magnesium hydroxide decomposes and releases moisture, reducing the flame temperature; antimony trioxide is an environmentally friendly flame retardant, so the combination of the two can achieve a good flame retardant effect while also reducing smoke generation; by modifying it with γ-aminopropyltriethoxysilane, the dispersion performance of magnesium hydroxide and antimony trioxide can be improved, thereby improving the mechanical properties of the final cable material.
[0009] In one specific implementation scheme, the weight ratio of magnesium hydroxide to antimony trioxide in the mixture is (5.5-6.5):1; the weight ratio of the spraying liquid to the mixture is 1:(13-14). By adopting the above technical solution, the ratio of magnesium hydroxide and antimony trioxide, as well as the ratio of spray liquid and mixture, are further defined, thereby improving the performance of the obtained flame retardant.
[0010] In one specific implementation, the dispersant comprises a mixture of hydrocarbon synthetic oil and zinc stearate.
[0011] By adopting the above technical solution, the hydrocarbon synthetic oil has a good dispersion effect on the flame retardant and does not precipitate, increasing fluidity. Zinc stearate plays a lubricating role, making the raw materials in the cable material evenly dispersed.
[0012] In one specific implementation, the antioxidant comprises a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228.
[0013] In one specific implementation, the compatibilizer comprises PE-g-MAH.
[0014] In one specific implementation, the raw materials of the cable material further include 1 to 5 parts by weight of methylphenyl silicone resin and 0.5 to 3 parts by weight of nano-silica.
[0015] By adopting the above technical solution, methylphenyl silicone resin forms a dense siloxane protective layer during combustion, which isolates oxygen and heat and significantly reduces smoke density. At the same time, its hydrophobicity can prevent the material from absorbing moisture and maintain stable electrical properties. In addition, methylphenyl silicone resin and vinyl silicone rubber work synergistically to enhance char formation and lubricity. Combined with magnesium hydroxide, it increases the amount of residual char and inhibits smoke generation. Nano-silica enhances flame retardancy and smoke suppression and improves light transmittance.
[0016] In one specific implementation, the raw materials of the cable material further include 3 to 5 parts by weight of melamine cyanurate and 3 to 5 parts by weight of tri(butoxyethyl) phosphate.
[0017] By adopting the above technical solutions, melamine cyanurate works synergistically with magnesium hydroxide and antimony trioxide to improve the oxygen index and char formation efficiency; tri(butoxyethyl) phosphate improves flame retardancy and enhances material flowability, facilitating injection molding; at the same time, phosphorus and nitrogen in melamine cyanurate synergistically promote char formation; in addition, tri(butoxyethyl) phosphate works synergistically with hydrocarbon synthetic oil to further improve flame retardant dispersion, avoid the use of halogen-containing materials, and maintain halogen-free characteristics.
[0018] Secondly, this application provides a method for preparing a high-transmittance pre-branched cable material, which adopts the following technical solution: A method for preparing a high-transmittance pre-branched cable material includes the following steps: Intensive mixing: The base resin, compatibilizer, masterbatch, flame retardant, synergistic flame retardant, dispersant, antioxidant and other raw materials are first intensively mixed to 130°C to obtain intensively mixed material; Granulation: The granulated material is extruded and granulated at 100-130℃ and cooled to obtain a pre-branched cable material with high light transmittance.
[0019] By adopting the above technical solution, the raw materials such as base resin, compatibilizer, masterbatch, flame retardant, synergistic flame retardant, dispersant, and antioxidant are first intensively mixed, and then extruded and granulated to obtain cable material with less smoke and high light transmittance after combustion.
[0020] In summary, this application includes at least one of the following beneficial technical effects: In this application, vinyl silicone rubber not only synergistically retards flames but also has advantages such as lubrication, demolding, and reduced smoke density; ferrocene can promote combustion and reduce smoke generation. Therefore, by combining the two, the amount of smoke generated by the cable material after combustion is reduced. In this application, the hydrocarbon synthetic oil has a good dispersing effect on the flame retardant and does not precipitate, increasing fluidity. Zinc stearate plays a lubricating role, making the raw materials in the cable material evenly dispersed. The method in this application involves first mixing raw materials such as base resin, compatibilizer, masterbatch, flame retardant, synergistic flame retardant, dispersant, and antioxidant, and then extruding and granulating them to obtain cable material with less smoke and higher light transmittance after combustion. Detailed Implementation
[0021] The present application will be further described in detail below with reference to the embodiments.
[0022] All raw materials used in the examples were commercially available. EVA was supplied by BASF Yangzi, model 6110M, with a VA content of 28%; LLDPE was supplied by Daqing Petrochemical, China National Petroleum Corporation, model DNDA8320, MFR: 20g / 10min (190℃×2.16kg); PE-g-MAH was supplied by Ningbo Nengzhiguang, model MC216A; carbon black masterbatch was supplied by Guangdong Jiucai New Materials, model PE96251; magnesium hydroxide was supplied by Albemarle, model H5; vinyl silicone rubber was model RC-VMR63-5.0, with a vinyl content of 5%; hydrocarbon synthetic oil was supplied by Mitsui Chemicals, model LUCANT LX010, with a kinematic viscosity of 1300 (40℃); methyl phenyl silicone resin was model SILRES MK; melamine cyanurate CAS number: 37640-57-6. Preparation Example
[0023] Preparation Example 1 Preparation Example 1 provides a method for preparing a flame retardant, comprising the following steps: γ-aminopropyltriethoxysilane, ethanol, and water were stirred and mixed thoroughly to obtain a spraying solution; The weight ratio of γ-aminopropyltriethoxysilane, ethanol, and water is 5:18:2. Magnesium hydroxide and antimony trioxide were stirred and mixed evenly to obtain a mixture. During the stirring process, a spraying liquid was slowly sprayed into the mixture. After the spraying was completed, stirring was continued for 0.5 hours, and then dried at 100°C for 2 hours to obtain a flame retardant. The weight ratio of magnesium hydroxide to antimony trioxide was 5.5:1, and the weight ratio of spraying liquid to mixture was 1:13.
[0024] Preparation Example 2 Preparation Example 2 provides a method for preparing a flame retardant, comprising the following steps: γ-aminopropyltriethoxysilane, ethanol, and water were stirred and mixed thoroughly to obtain a spraying solution; The weight ratio of γ-aminopropyltriethoxysilane, ethanol, and water is 5:18:2. Magnesium hydroxide and antimony trioxide were stirred and mixed evenly to obtain a mixture. During the stirring process, a spraying liquid was slowly sprayed into the mixture. After the spraying was completed, stirring was continued for 0.5 hours, and then dried at 100°C for 2 hours to obtain a flame retardant. The weight ratio of magnesium hydroxide to antimony trioxide was 6:1, and the weight ratio of spraying liquid to mixture was 1:13.5.
[0025] Preparation Example 3 Preparation Example 3 provides a method for preparing a flame retardant, comprising the following steps: γ-aminopropyltriethoxysilane, ethanol, and water were stirred and mixed thoroughly to obtain a spraying solution; The weight ratio of γ-aminopropyltriethoxysilane, ethanol, and water is 5:18:2. Magnesium hydroxide and antimony trioxide were stirred and mixed evenly to obtain a mixture. During the stirring process, a spraying liquid was slowly sprayed into the mixture. After the spraying was completed, stirring was continued for 0.5 hours, and then dried at 100°C for 2 hours to obtain a flame retardant. The weight ratio of magnesium hydroxide to antimony trioxide was 6.5:1, and the weight ratio of spraying liquid to mixture was 1:14. Example
[0026] Example 1 Example 1 provides a method for preparing high-transmittance pre-branched cable material, comprising the following steps: Internal mixing: 25 kg of base resin, 1 kg of compatibilizer, 0.5 kg of masterbatch, 21 kg of flame retardant from Preparation Example 1, 2.05 kg of synergistic flame retardant, 0.7 kg of dispersant, and 0.6 kg of antioxidant were added to an internal mixer and mixed at 130°C to obtain the internally mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; the masterbatch is carbon black masterbatch; and the synergistic flame retardant is vinyl silicone rubber and dioxane. The mixture is composed of iron, with a weight ratio of vinyl silicone rubber to ferrocene of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2. Granulation: The granulated material is added to a single screw extruder and granulated, then cooled to room temperature to obtain a high light transmittance pre-branched cable material; the temperature zones of the single screw extruder are set as follows: barrel 100℃, 115℃, 120℃, 125℃, 130℃, neck 130℃, and head 130℃.
[0027] Example 2 The difference between Example 2 and Example 1 is the mixing process: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant from Example 1, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, and 1.5 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material. The base resin was a mixture of EVA and LLDPE, with a weight ratio of EVA to LLDPE of 1:3; the compatibilizer was PE-g-MAH; the masterbatch was carbon black masterbatch; and the synergistic flame retardant was vinyl silicone rubber and dioxane. The mixture is composed of iron, and the weight ratio of vinyl silicone rubber to ferrocene is 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, and the weight ratio of hydrocarbon synthetic oil to zinc stearate is 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024 and antioxidant S-9228, and the weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024 and antioxidant S-9228 is 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 1.
[0028] Example 3 The difference between Example 3 and Example 1 is the mixing process: 55 kg of base resin, 8 kg of compatibilizer, 2 kg of masterbatch, 60 kg of flame retardant from Example 1, 32 kg of synergistic flame retardant, 6.0 kg of dispersant, and 3 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material. The base resin was a mixture of EVA and LLDPE, with a weight ratio of EVA to LLDPE of 1:3. The compatibilizer was PE-g-MAH. The masterbatch was carbon black masterbatch. The synergistic flame retardant was vinyl silicone rubber and ferrocene. The mixture is composed of vinyl silicone rubber and ferrocene in a weight ratio of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate in a weight ratio of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024 and antioxidant S-9228 in a weight ratio of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 1.
[0029] Example 4 The difference between Example 4 and Example 2 is the mixing process: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant from Example 2, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, and 1.5 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material. The base resin was a mixture of EVA and LLDPE, with a weight ratio of EVA to LLDPE of 1:3; the compatibilizer was PE-g-MAH; the masterbatch was carbon black masterbatch; and the synergistic flame retardant was vinyl silicone rubber and diocene. The mixture consists of iron, with a weight ratio of vinyl silicone rubber to ferrocene of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 2.
[0030] Example 5 The difference between Example 5 and Example 2 is the mixing process: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant from Example 3, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, and 1.5 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material. The base resin was a mixture of EVA and LLDPE, with a weight ratio of EVA to LLDPE of 1:3; the compatibilizer was PE-g-MAH; the masterbatch was carbon black masterbatch; and the synergistic flame retardant was vinyl silicone rubber and dioxane. The mixture consists of iron, with a weight ratio of vinyl silicone rubber to ferrocene of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 2.
[0031] Example 6 The difference between Example 6 and Example 4 is the mixing process: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, and 1.5 kg of antioxidant are added to an internal mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; the masterbatch is carbon black masterbatch; and the synergistic flame retardant is a mixture of vinyl silicone rubber and ferrocene. The weight ratio of vinyl silicone rubber to ferrocene is 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the flame retardant is magnesium hydroxide; the remaining steps are consistent with Example 4.
[0032] Example 7 The difference between Example 7 and Example 4 is the mixing process: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant from Preparation Example 2, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, 1.5 kg of antioxidant, 3 kg of methylphenyl silicone resin, and 1.5 kg of nano-silica were added to a mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; the masterbatch is carbon black masterbatch; and the synergistic flame retardant... The agent is a mixture of vinyl silicone rubber and ferrocene, with a weight ratio of vinyl silicone rubber to ferrocene of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 4.
[0033] Example 8 The difference between Example 8 and Example 4 is that, in the internal mixing: 40 kg of base resin, 5 kg of compatibilizer, 1 kg of masterbatch, 35 kg of flame retardant from Preparation Example 2, 15.1 kg of synergistic flame retardant, 2.5 kg of dispersant, 1.5 kg of antioxidant, 3 kg of methylphenyl silicone resin, 1.5 kg of nano-silica, 4 kg of melamine cyanurate, and 4 kg of tri(butoxyethyl) phosphate were added to an internal mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MA. H; the masterbatch is carbon black masterbatch; the synergistic flame retardant is a mixture of vinyl silicone rubber and ferrocene, with a weight ratio of vinyl silicone rubber to ferrocene of 15:0.1; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with Example 4. Comparative Example
[0034] Comparative Example 1 The difference between Comparative Example 1 and Example 1 lies in the internal mixing: 25 kg of base resin, 1 kg of compatibilizer, 0.5 kg of masterbatch, 23.05 kg of flame retardant from Example 1, 0.7 kg of dispersant, and 0.6 kg of antioxidant were added to an internal mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; and the masterbatch is carbon. The black masterbatch; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 1.
[0035] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is the mixing process: 25 kg of base resin, 1 kg of compatibilizer, 0.5 kg of masterbatch, 21 kg of flame retardant from Example 1, 2.05 kg of synergistic flame retardant, 0.7 kg of dispersant, and 0.6 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; and the masterbatch is carbon black masterbatch. Materials; the synergistic flame retardant is vinyl silicone rubber; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 1.
[0036] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is the mixing process: 25 kg of base resin, 1 kg of compatibilizer, 0.5 kg of masterbatch, 21 kg of flame retardant from Example 1, 2.05 kg of synergistic flame retardant, 0.7 kg of dispersant, and 0.6 kg of antioxidant were added to a mixer and mixed at 130°C to obtain the mixed material; wherein the base resin is a mixture of EVA and LLDPE, and the weight ratio of EVA to LLDPE is 1:3; the compatibilizer is PE-g-MAH; and the masterbatch is carbon. The masterbatch is black; the synergistic flame retardant is ferrocene; the dispersant is a mixture of hydrocarbon synthetic oil and zinc stearate, with a weight ratio of hydrocarbon synthetic oil to zinc stearate of 2:0.5; the antioxidant is a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228, with a weight ratio of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228 of 0.5:0.5:0.3:0.2; the remaining steps are consistent with those in Example 1. Performance testing experiment
[0037] Smoke density: The smoke density of the cable material in each example and comparative example was tested according to GB / T 8323.
[0038] Light transmittance: The light transmittance of the pre-branched cable connectors of the cable materials in each embodiment and comparative example was tested according to IEC61034-2-2013.
[0039] Flame retardant properties: The oxygen index of the cable material in each embodiment and comparative example was tested.
[0040] Heat aging resistance: The initial tensile strength and elongation at break of the cable materials in each example and comparative example were tested, and then they were aged at 100°C for 240 hours. The change rate of tensile strength and the change rate of elongation at break were tested.
[0041] Table 1 Performance test results of cable materials
[0042] Combining Example 1 and Comparative Examples 1-3, the cable material in Example 1 not only has good flame retardant properties, but also low smoke density and high light transmittance. It can be seen that when preparing the cable material, adding a synergistic flame retardant composed of vinyl silicone rubber and ferrocene to the raw materials can reduce the amount of smoke generated after combustion. Vinyl silicone rubber not only has synergistic flame retardant properties, but also has the advantages of lubrication, demolding, and reducing smoke density. Ferrocene can promote combustion and reduce smoke generation. Therefore, by using the combination of the two, the amount of smoke generated after combustion of the cable material is reduced.
[0043] In conjunction with Examples 1-3, the cable materials in Examples 1-3 all have good flame retardant properties, low smoke density, high light transmittance, and good mechanical properties. It can be seen that when preparing cable materials, the performance of the cable materials obtained according to the raw material ratios in Examples 1-3 is better.
[0044] Combining Examples 2, 4, and 5, the cable materials in Examples 2, 4, and 5 all exhibit good performance. It is evident that when using the flame retardant from Examples 1-3 as the flame retardant in the preparation of the cable material, the resulting cable materials all exhibit good performance.
[0045] Combining Examples 4 and 6, the cable material in Example 4 has better performance. It can be seen that when preparing the cable material, using unmodified single magnesium hydroxide as the flame retardant will affect the performance of the final cable material.
[0046] Combining Examples 4 and 7, the cable material in Example 7 exhibits better performance. This demonstrates that when methylphenyl silicone resin and nano-silica are added to the raw materials during the preparation of the cable material, the methylphenyl silicone resin forms a dense siloxane protective layer during combustion, isolating oxygen and heat and significantly reducing smoke density. Furthermore, the methylphenyl silicone resin synergistically enhances char formation and lubricity with vinyl silicone rubber; it combines with magnesium hydroxide to increase char residue and suppress smoke generation; and the nano-silica enhances flame retardancy and smoke suppression, and improves light transmittance, thus further improving the performance of the obtained cable material.
[0047] Combining Examples 7 and 8, the cable material in Example 8 exhibits better performance. This indicates that when melamine cyanurate and tri(butoxyethyl) phosphate are added to the raw materials during the preparation of the cable material, the melamine cyanurate works synergistically with magnesium hydroxide and antimony trioxide to improve the oxygen index and charring efficiency. Tri(butoxyethyl) phosphate improves flame retardancy, and the phosphorus element therein synergistically promotes charring with the nitrogen element in melamine cyanurate, thus further improving the performance of the obtained cable material.
[0048] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A high light transmittance pre-branched cable material, characterized in that: The raw materials of the cable material include the following components in parts by weight: 25-55 parts of base resin, 1-8 parts of compatibilizer, 0.5-2.0 parts of masterbatch, 21-60 parts of flame retardant, 2.05-32 parts of synergistic flame retardant, 0.7-6.0 parts of dispersant, and 0.6-3 parts of antioxidant; the synergistic flame retardant is a mixture of vinyl silicone rubber and ferrocene.
2. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The base resin comprises a mixture of EVA and LLDPE.
3. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The method for preparing the flame retardant includes the following steps: γ-aminopropyltriethoxysilane, ethanol, and water are stirred and mixed evenly to obtain a spraying solution; Magnesium hydroxide and antimony trioxide are stirred and mixed evenly to obtain a mixture. During the stirring process, a spraying liquid is slowly sprayed into the mixture. After the spraying is completed, stirring is continued and the mixture is dried to obtain a flame retardant.
4. The high light transmittance pre-branched cable material according to claim 3, characterized in that: The weight ratio of magnesium hydroxide to antimony trioxide in the mixture is (5.5-6.5):1; the weight ratio of the spraying liquid to the mixture is 1:(13-14).
5. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The dispersant comprises a mixture of hydrocarbon synthetic oil and zinc stearate.
6. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The antioxidant comprises a mixture of antioxidant 1010, antioxidant 1076, antioxidant 1024, and antioxidant S-9228.
7. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The compatibilizer includes PE-g-MAH.
8. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The raw materials for the cable material also include 1 to 5 parts by weight of methylphenyl silicone resin and 0.5 to 3 parts by weight of nano-silica.
9. The high light transmittance pre-branched cable material according to claim 1, characterized in that: The raw materials of the cable material also include 3-5 parts by weight of melamine cyanurate and 3-5 parts by weight of tri(butoxyethyl) phosphate.
10. A method for preparing a high-transmittance pre-branched cable material as described in any one of claims 1-9, characterized in that: Includes the following steps: Intensive mixing: The base resin, compatibilizer, masterbatch, flame retardant, synergistic flame retardant, dispersant, antioxidant and other raw materials are first intensively mixed to 130°C to obtain intensively mixed material; Granulation: The granulated material is extruded and granulated at 100-130℃ and cooled to obtain a high light transmittance pre-branched cable material.