Flame-retardant interference-resistant flexible cable insulation material, preparation method and cable

Abstract

The application discloses a kind of flame-retardant anti-interference flexible cable insulation materials, preparation method and cable.The kind of flame-retardant anti-interference flexible cable insulation materials includes the following raw materials according to weight parts: mica 10~30 parts, epoxy resin 45~60 parts, potassium perfluorobutyl sulfonate 5~10 parts, basalt fiber 5~15 parts, magnesium hydroxide 5~15 parts, aluminum silicate 5~15 parts, binder 10~15 parts, crosslinked polyethylene 5~10 parts, nano silicon dioxide 10~15 parts.Simultaneously, the application provides a kind of flame-retardant anti-interference flexible cable, the cable includes sheath layer, insulation layer and wire core.The cable includes sheath layer, insulation layer and wire core;Wherein, the insulation layer is fused extrusion coated into insulation layer by the flame-retardant anti-interference flexible cable insulation material provided by the application on wire core.The flame-retardant anti-interference flexible cable insulation material provided by the application has the advantages of higher flame retardancy, anti-interference and better softness.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cable processing, in particular to a flame-retardant anti-interference flexible cable insulation material, a preparation method and a cable. BACKGROUND

[0002] The cable insulation layer plays an important role in the cable structure, which can isolate the charge between the conductor or power line in the cable and the external environment, provide electrical insulation and prevent current leakage. The quality and performance of the cable insulation layer directly affect the safety and reliability of the cable. In the existing technology, there are some problems in the cable insulation layer materials. For example, the flame-retardant performance of part of the cable insulation layer materials is low, which will cause serious safety accidents such as fire and explosion during the use of the cable, and further affect the normal use of the cable. In addition, the anti-interference ability of part of the cable insulation layer materials is also low, which is easily affected by external electromagnetic interference. This will cause the quality of cable signal transmission to decline, and even cause data loss or transmission interruption. In addition, the flexibility of part of the cable insulation layer materials is poor, and it cannot adapt to complex installation environment. In some occasions that require bending or folding, the cable insulation layer will crack or break, thereby affecting the normal use of the cable. SUMMARY

[0003] In order to solve at least one of the above technical problems, a cable insulation material with good flame retardance, anti-interference and softness is developed, and the application provides a flame-retardant anti-interference flexible cable insulation material, a preparation method and a cable.

[0004] In a first aspect, the application provides a flame-retardant anti-interference flexible cable insulation material, which comprises the following raw materials in parts by weight: mica 10-30 parts, epoxy resin 45-60 parts, potassium perfluorobutyl sulfonate 5-10 parts, basalt fiber 5-15 parts, magnesium hydroxide 5-15 parts, aluminum silicate 5-15 parts, binder 10-15 parts, cross-linked polyethylene 5-10 parts, and nano-silicon dioxide 10-15 parts.

[0005] By adopting the technical scheme, the cable insulation material provided by the application has the flame-retardant performance, the anti-interference ability and the flexibility. The mica and the epoxy resin can provide the insulation material with good high-temperature resistance. The use of the potassium perfluorobutyl sulfonate and the basalt fiber in the cable insulation material can provide the insulation material with high flame-retardant performance. In addition, the basalt fiber can improve the tensile strength of the insulation layer. Meanwhile, the magnesium hydroxide and the aluminum silicate can improve the flame retardancy, and the use of the nano silicon dioxide can increase the anti-interference ability of the insulation material, effectively block the influence of external electromagnetic interference on the cable signal, and improve the quality and reliability of signal transmission. In addition, the use of the adhesive and the cross-linked polyethylene can improve the flexibility of the insulation material, so that the cable insulation material is not easy to break or crack when being bent or folded, and the adaptability and service life of the cable are improved. In summary, the flame-retardant and anti-interference flexible cable insulation material provided by the application can improve the flame retardancy, anti-interference ability and flexibility of the cable, thereby improving the safety, reliability and adaptability of the cable.

[0006] Optionally, the cable insulation layer comprises the following raw materials by weight: mica 20-30 parts, epoxy resin 50-60, potassium perfluorobutyl sulfonate 8-10 parts, basalt fiber 10-15 parts, magnesium hydroxide 10-15 parts, aluminum silicate 10-15 parts, adhesive 12-15 parts, cross-linked polyethylene 8-10 parts, and nano silicon dioxide 12-15 parts.

[0007] Optionally, the weight ratio of the potassium perfluorobutyl sulfonate to the basalt fiber is 1:(1.5-2).

[0008] Optionally, the weight ratio of the potassium perfluorobutyl sulfonate to the basalt fiber is 1:1.9.

[0009] Optionally, the average particle size of the basalt fiber is 3.0-8.0 μm.

[0010] By adopting the technical scheme, the basalt fiber can increase the flame-retardant performance and the tensile strength of the insulation material. Meanwhile, the smaller particle size also helps to improve the uniformity and stability of the insulation material.

[0011] Optionally, the epoxy resin comprises at least one of bisphenol A type epoxy resin and bisphenol F type epoxy resin.

[0012] By adopting the technical scheme, the bisphenol A type epoxy resin has good heat resistance and chemical resistance, and provides the cable insulation material with high insulation performance and durability. The bisphenol F type epoxy resin has low viscosity and high flexibility, and can improve the processability and flexibility of the insulation material.

[0013] Optionally, the average particle size of the nano silicon dioxide is not higher than 100 nm.

[0014] By adopting the above technical scheme, the nano-silicon dioxide is a nano material with a small particle size, a large specific surface area and high surface activity. The addition of the nano-silicon dioxide in the cable insulation material can enhance the tensile strength and anti-interference capability of the insulation material. In addition, the nano-silicon dioxide has good flame retardant performance and heat resistance, and can improve the flame retardance and high-temperature resistance of the cable insulation material.

[0015] Optionally, the binder comprises at least one of an ethylene-vinyl acetate copolymer binder and a polyvinyl chloride binder.

[0016] In a second aspect, the application provides a preparation method of the flame-retardant and anti-interference flexible cable insulation material, which comprises the following steps:

[0017] S1, mixing epoxy resin and potassium perfluorobutyl sulfonate to obtain a mixture of the epoxy resin and the potassium perfluorobutyl sulfonate, for standby;

[0018] S2, mixing mica, magnesium hydroxide, aluminum silicate, a binder, cross-linked polyethylene and nano-silicon dioxide, and then stirring in a stirrer at a speed of 3000 revolutions per minute for 20 minutes to obtain a mixture A;

[0019] S3, melting basalt fiber and adding to the mixture A for mixing for not less than 30 minutes to obtain a mixture B;

[0020] S4, mixing the mixture B with the mixture of the epoxy resin and the potassium perfluorobutyl sulfonate to obtain a mixed glue C;

[0021] S5, discharging the mixed glue C into a screw extruder, and setting the temperature of the extruder to 165℃, and then extruding the material to obtain the cable insulation material.

[0022] By adopting the above technical scheme, the preparation method provided by the application can better mix the raw materials together, thereby improving the stability of the insulation material, and at the same time, a cable insulation material with good flame retardance, anti-interference and flexibility can be prepared.

[0023] In a third aspect, the application provides a flame-retardant and anti-interference flexible cable, which comprises a sheath layer, an insulation layer and a wire core, wherein the insulation layer is formed by melting and extruding the flame-retardant and anti-interference flexible cable insulation material provided by the application on the wire core to form the insulation layer.

[0024] By adopting the technical scheme, the application provides a flexible cable with flame retardation and anti-interference, which comprises a sheath layer, an insulation layer and a wire core. The insulation layer is formed by melting and extruding the flexible cable insulation material with flame retardation and anti-interference provided by the application on the wire core. The formation of the insulation layer can provide insulation protection for the cable, prevent current leakage and electromagnetic interference. The flexible cable with flame retardation and anti-interference provided by the application has good insulation performance, durability, anti-interference and flame retardation, and can be widely applied in various industrial and commercial fields.

[0025] In summary, the application has at least one of the following beneficial technical effects:

[0026] 1. The flexible cable with flame retardation and anti-interference provided by the application has good insulation performance, durability, anti-interference and flame retardation, and can be widely applied in various industrial and commercial fields.

[0027] 2. The preparation method provided by the application can better mix the raw materials together, thereby improving the stability of the insulation material, and the cable insulation material with good flame retardation, anti-interference and flexibility can be prepared.

[0028] 3. The flexible cable with flame retardation and anti-interference provided by the application has good insulation performance, durability, anti-interference and flame retardation. It can be widely applied in various industrial and commercial fields. DETAILED DESCRIPTION

[0029] The application will be further described in detail below in combination with examples. DETAILED DESCRIPTION

[0031] In the examples, examples and comparative examples of the application, unless otherwise specified, each raw material used is a commercially available product.

[0032] The following are the manufacturers and specific information of some raw materials used in the application.

[0033]

[0034]

[0035] Example 1

[0036] The example provides a flexible cable with flame retardation and anti-interference, which comprises a sheath layer, an insulation layer and a wire core. The insulation layer is formed by melting and extruding the flexible cable insulation material with flame retardation and anti-interference provided by the application on the wire core. The formation of the insulation layer can provide insulation protection for the cable, prevent current leakage and electromagnetic interference. The flexible cable with flame retardation and anti-interference provided by the application has good insulation performance, durability, anti-interference and flame retardation, and can be widely applied in various industrial and commercial fields.

[0037] The preparation method is as follows:

[0038] The epoxy resin is added to the potassium perfluorobutyl sulfonate for mixing to obtain a mixture of the epoxy resin and the potassium perfluorobutyl sulfonate, which is ready for use;

[0039] S2, the mica, magnesium hydroxide, aluminum silicate, binder, cross-linked polyethylene, and nano-silicon dioxide are mixed and then added to a stirrer for stirring at a speed of 3000 revolutions per minute for 20 minutes, and the mixture is obtained after standing;

[0040] S3, the basalt fiber is melted and added to the mixture A for mixing for 30 minutes to obtain a mixture B;

[0041] S4, the mixture B is mixed with the mixture of the epoxy resin and the potassium perfluorobutyl sulfonate to obtain a mixed glue C;

[0042] S5, the mixed glue C is discharged into a screw extruder, and the temperature of the extruder is 165°C, and the extruded material is the cable insulation material.

[0043] Examples 2-5

[0044] Examples 2-5 differ from Example 1 in that the weight fractions of some components are different from those of Example 1. See Table 1 for the differences.

[0045] Table 1 - Differences between Examples 2-5 and Example 1

[0046]

[0047]

[0048] Comparative Examples 1-4

[0049] Comparative Example 1

[0050] This comparative example differs from Example 1 in that basalt fiber is not used in the preparation of the cable insulation material.

[0051] Comparative Example 2

[0052] This comparative example differs from Example 1 in that potassium perfluorobutyl sulfonate is not used in the preparation of the cable insulation material.

[0053] Comparative Example 3

[0054] This comparative example differs from Example 1 in that both potassium perfluorobutyl sulfonate and basalt fiber are not included in the preparation of the cable insulation material.

[0055] Comparative Example 4

[0056] The difference between the present comparative example and Example 1 is that the particle size of the nanosilica is 110 nm when the cable insulation material is prepared.

[0057] Comparative Example 5

[0058] The difference between the present comparative example and Example 1 is that the nanosilica is not included when the cable insulation material is prepared.

[0059] Experimental detection

[0060] Cables are prepared using the cable insulation materials prepared in Examples 1-5 and Comparative Examples 1-4, respectively. The structure of the cable includes a sheath layer, an insulation layer, and a wire core. The insulation layer is formed by melt extrusion coating of the cable insulation material on the wire core. The insulation layer is detected according to the following detection items, respectively.

[0061] 1. Tensile strength and elongation at break are detected according to GB / T1040-2006 and GB / T2951.12-2008, respectively.

[0062] The elongation at break after aging is detected according to GB / T29511.12-2008 "General Test Methods for Cable Insulation and Sheath Materials, Part 12: General Test Methods - Heat Aging Test". The change rate of the elongation at break after aging is not greater than ±25%.

[0063] (2) Heat aging test is carried out at a temperature of (135±2)℃ for 168 hours. The tensile strength and elongation at break after aging are tested according to GB / T1040-2006 and GB / T2951.12-2008, respectively. The current standard is JB / T10738-2007.

[0064] (3) Flame retardant performance detection: detected according to national standard UL1581.

[0065] (4) Volume resistivity at 20℃ (unit: Ω·m): The volume resistivity at 20℃ is measured by the method of GB1410-2006.

[0066] The test results of Examples 1-5 and Comparative Examples 1-5 are shown in Table 2.

[0067] Table 2 - Results of aging resistance performance and tensile strength detection experiment

[0068]

[0069] Result analysis:

[0070] From the detection data in Table 2, it can be seen that Examples 2-5 differ from Example 1 in that the weight fractions of the components are different when preparing the cable insulation material. From the results in Table 2, it can be seen that the cable insulation material prepared from Example 4 has good tensile strength, and the elongation at break and tensile strength change rate before and after aging are low, and the volume resistivity is also large. Therefore, the cable insulation material prepared from Example 4 has the advantages of good flame retardance, flexibility, and anti-interference.

[0071] Comparative Example 1 differs from Example 1 in that basalt fiber is not used when preparing the cable insulation material. From the detection results in Table 2, it can be seen that when basalt fiber is not used, the elongation at break and tensile strength of the insulation layer decrease significantly, which also affects the resistivity and reduces the flame retardance. Therefore, when preparing the cable insulation material, basalt fiber can provide good tensile strength and flame retardance for the insulation layer, and also helps to improve the volume resistivity.

[0072] Comparative Example 2 differs from Example 1 in that potassium perfluorobutyl sulfonate is not used when preparing the cable insulation material. From the results in Table 2, it can be seen that when potassium perfluorobutyl sulfonate is used when preparing the cable insulation material, it helps to improve the flame retardance, and to some extent, affects the tensile strength of the prepared cable insulation layer.

[0073] Comparative Example 3 differs from Example 1 in that it does not include potassium perfluorobutyl sulfonate and basalt fiber when preparing the cable insulation material. From the results in Table 2, it can be seen that when both potassium perfluorobutyl sulfonate and basalt fiber are not used, it affects the flame retardance, tensile strength, and elongation at break of the prepared cable insulation material, and also affects the volume resistivity. From the detection results of Comparative Examples 1-2, it can be seen that when potassium perfluorobutyl sulfonate and basalt fiber are used together, they help to improve the tensile strength and flame retardance of the prepared insulation material.

[0074] Comparative Example 4 differs from Example 1 in that the particle size of the nano-silicon dioxide used is different. From the data in Table 2, it can be seen that when a silicon dioxide with a particle size of 110 nm is used, the flame retardant volume resistivity of the prepared insulation layer material is significantly lower than that of the insulation layer material prepared in Example 1. The reason may be that the nano-silicon dioxide with a smaller particle size has a larger specific surface area, which increases the contact area with the remaining insulation material, thereby enhancing the interface effect between the nano-particles and the insulation material, and further improving the volume resistivity.

[0075] Comparative Example 5 is different from Example 1 in that, in the preparation of the cable insulation material, no nanosilica is included. As can be seen from the test results in Table 2, if no nanosilica is used in the preparation of the insulation material provided in the present application, it will have a greater impact on the improvement of the volume resistivity of the prepared insulation material.

[0076] The inventors found from the test data of the comparative examples and the examples that when potassium perfluorobutyl sulfonate and basalt fiber are used in combination, they have a more obvious influence on the flame retardant performance, tensile strength and elongation at break of the prepared insulation material. Therefore, in order to find a better proportion, the inventors further optimized the proportion of potassium perfluorobutyl sulfonate and basalt fiber in Examples 6-8 based on Example 4.

[0077] Examples 6-9

[0078] Example 6

[0079] This example is different from Example 4 in that, in this example, the total weight fraction of potassium perfluorobutyl sulfonate and basalt fiber is 22 parts, and the weight ratio of potassium perfluorobutyl sulfonate to basalt fiber is 1:1.5.

[0080] Example 7

[0081] This example is different from Example 4 in that, in this example, the total weight fraction of potassium perfluorobutyl sulfonate and basalt fiber is 22 parts, and the weight ratio of potassium perfluorobutyl sulfonate to basalt fiber is 1:1.8.

[0082] Example 8

[0083] This example is different from Example 4 in that, in this example, the total weight fraction of potassium perfluorobutyl sulfonate and basalt fiber is 22 parts, and the weight ratio of potassium perfluorobutyl sulfonate to basalt fiber is 1:1.9.

[0084] Example 9

[0085] This example is different from Example 4 in that, in this example, the total weight fraction of potassium perfluorobutyl sulfonate and basalt fiber is 22 parts, and the weight ratio of potassium perfluorobutyl sulfonate to basalt fiber is 1:2.

[0086] The test results of Examples 6-9 are shown in Table 3.

[0087] Table 3 - Test results of Examples 6-9

[0088]

[0089] Result analysis:

[0090] The difference between the embodiment 6-9 and the embodiment 4 is that the weight ratio of the potassium perfluorobutyl sulfonate and the basalt fiber is different, and the results in the table 3 show that when the weight ratio of the potassium perfluorobutyl sulfonate and the basalt fiber is 1:1.9, the tensile strength and the elongation at break can be obviously improved.

[0091] Embodiment 10-11

[0092] Embodiment 10

[0093] The difference between the embodiment and the embodiment 8 is that the epoxy resin in the embodiment is bisphenol F type epoxy resin.

[0094] Embodiment 11

[0095] The difference between the embodiment and the embodiment 8 is that the epoxy resin in the embodiment is composed of bisphenol F type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the bisphenol F type epoxy resin to the bisphenol A type epoxy resin is 1:1.

[0096] The detection results of the embodiment 10-11 are shown in the table 4.

[0097] Table 4-Detection results of the embodiment 10-11

[0098]

[0099] Result analysis:

[0100] The results in the table 4 show that when the epoxy resin is composed of bisphenol F type epoxy resin and bisphenol A type epoxy resin, the prepared cable insulation material has better tensile strength and elongation at break.

[0101] Embodiment 12-13

[0102] Embodiment 12

[0103] The difference between the embodiment and the embodiment 11 is that the adhesive in the embodiment is polyvinyl chloride (PVC) adhesive.

[0104] Embodiment 13

[0105] The difference between the embodiment and the embodiment 11 is that the adhesive in the embodiment is composed of polyvinyl chloride (PVC) adhesive and polyvinyl chloride (PVC) adhesive; and the weight ratio of the polyvinyl chloride (PVC) adhesive to the polyvinyl chloride (PVC) adhesive is 1:1.

[0106] The detection results of the embodiment 12-13 are shown in the table 5.

[0107] Table 5-Detection results of the embodiment 12-13

[0108]

[0109] Results analysis:

[0110] In combination with the results in Table 5, it can be seen that the cable insulation layer material prepared in Example 13 has good tensile strength, anti-interference performance and flame retardant performance.

[0111] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made in structure, shape, principle, etc. according to the present application should be encompassed within the protection scope of the present application.

Claims

1. A flame-retardant, interference-resistant, flexible cable insulation material, characterized in that The cable insulation material comprises the following raw materials by weight: mica 10-30 parts, epoxy resin 45-60 parts, potassium perfluorobutyl sulfonate 5-10 parts, basalt fiber 5-15 parts, magnesium hydroxide 5-15 parts, aluminum silicate 5-15 parts, binder 10-15 parts, cross-linked polyethylene 5-10 parts, and nano-silicon dioxide 10-15 parts.

2. A flame retardant, interference resistant, flexible cable insulation material according to claim 1, wherein, The cable insulation material comprises the following raw materials by weight: mica 20-30 parts, epoxy resin 50-60 parts, potassium perfluorobutyl sulfonate 8-10 parts, basalt fiber 10-15 parts, magnesium hydroxide 10-15 parts, aluminum silicate 10-15 parts, binder 12-15 parts, cross-linked polyethylene 8-10 parts, and nano-silicon dioxide 12-15 parts.

3. A flame retardant, interference resistant, flexible cable insulation material according to claim 1, wherein, The weight ratio of the potassium perfluorobutyl sulfonate to the basalt fiber is 1:1.

9.

4. A flame retardant, interference resistant, flexible cable insulation material according to claim 3, characterised in that, The weight ratio of the potassium perfluorobutyl sulfonate to the basalt fiber is 1:1.

9.

5. A flame retardant, interference resistant, flexible cable insulation material according to claim 1, wherein, The average particle size of the basalt fiber is 3.0-8.0 μm.

6. A flame retardant, interference resistant, flexible cable insulation material according to claim 1, wherein, The epoxy resin comprises at least one of bisphenol A type epoxy resin and bisphenol F type epoxy resin.

7. A process for the preparation of a flame-retardant, interference-resistant, flexible cable insulation material according to Claim 1, characterized in that The preparation method comprises the following steps: S1, adding epoxy resin into potassium perfluorobutyl sulfonate for mixing to obtain a mixture of epoxy resin and potassium perfluorobutyl sulfonate, for standby use; S2, mixing mica, magnesium hydroxide, aluminum silicate, binder, cross-linked polyethylene, and nano-silicon dioxide, and then adding them into a stirrer for stirring, wherein the stirring speed of the stirrer is 3000 revolutions per minute, and the stirring time is 20 minutes, and then standing to obtain a mixture A; S3, melting basalt fiber, and adding the melted basalt fiber into the mixture A for mixing for not less than 30 minutes to obtain a mixture B; S4, mixing the mixture B with the mixture of epoxy resin and potassium perfluorobutyl sulfonate to obtain a mixed glue C; S5, discharging the mixed glue C into a screw extruder, and setting the temperature of the extruder to 165°C, and then extruding the material to obtain the cable insulation material.

8. A flame-retardant, interference-resistant flexible cable, characterized in that The cable comprises a sheath layer, an insulation layer, and a wire core; wherein the insulation layer is formed by melting and extruding the flame-retardant and anti-interference flexible cable insulation material according to any one of claims 1-6 on the wire core.

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