CN115746480A - Flame-retardant cable protective sleeve, preparation method thereof and medium-voltage cable - Google Patents
Flame-retardant cable protective sleeve, preparation method thereof and medium-voltage cable Download PDFInfo
- Publication number
- CN115746480A CN115746480A CN202310020759.5A CN202310020759A CN115746480A CN 115746480 A CN115746480 A CN 115746480A CN 202310020759 A CN202310020759 A CN 202310020759A CN 115746480 A CN115746480 A CN 115746480A
- Authority
- CN
- China
- Prior art keywords
- parts
- flame
- cable protective
- protective sleeve
- magnesium hydroxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to the technical field of cable sheaths, and particularly discloses a flame-retardant cable protective sleeve, a preparation method thereof and a medium-voltage cable. A flame-retardant cable protective sleeve comprises the following raw materials in parts by weight: 100-120 parts of PVC resin, 6-10 parts of composite flame retardant, 20-30 parts of expanded graphite, 40-50 parts of active calcium carbonate, 1-2 parts of calcium-zinc stabilizer and 1-2 parts of calcium stearate; the composite flame retardant is a mixture of poly (diphenoxyphosphazene) and magnesium hydroxide micro powder; the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxyphosphazene) is 1: (10-25). The maximum limit oxygen index of the medium-voltage cable of the cable protective sleeve obtained by the invention can reach 45 percent, the horizontal burning grade and the vertical burning grade are FH-1 and FV-0 respectively, and the flame retardance of the medium-voltage cable is improved.
Description
Technical Field
The invention relates to the technical field of cable sheaths, in particular to a flame-retardant cable protective sleeve, a preparation method thereof and a medium-voltage cable.
Background
The cable can be divided into an extra-high voltage cable, a medium voltage cable and a low voltage cable according to voltage grades, wherein the medium voltage cable is a cable with the voltage of 35 kilovolts or less, is used for transmitting and distributing electric energy, and is widely used in the fields of urban underground power grids, power station leading-out lines, power supply in industrial and mining, river-crossing underwater power transmission lines and the like.
With the continuous progress of science and technology, the cable industry has also been developed rapidly, and the cable is gradually and intensively laid in the fields of high-rise buildings, subways, petrochemical engineering, large-scale entertainment venues and the like, but the medium-voltage cable has poor flame retardance and fire resistance, can generate gases such as hydrogen chloride and the like with toxicity and corrosiveness and severe dense smoke in the combustion process, and is easy to cause a large amount of casualties and damage to precision instruments in fire.
In the related technology, the flame retardant antimony trioxide is added into the cable protective sleeve to achieve the flame retardant effect, but the flame retardant property of the obtained cable protective sleeve is still poor, and the actual use requirements of outdoor areas or flammable and explosive areas and other high-temperature areas are difficult to meet.
Disclosure of Invention
In order to improve the flame retardance of the cable protective sleeve, the invention provides a flame-retardant cable protective sleeve, a preparation method thereof and a medium-voltage cable.
In a first aspect, the invention provides a flame-retardant cable protective sleeve, which adopts the following technical scheme:
a flame-retardant cable protective sleeve comprises the following raw materials in parts by weight: 100-120 parts of PVC resin, 6-10 parts of composite flame retardant, 20-30 parts of expanded graphite, 40-50 parts of active calcium carbonate, 1-2 parts of calcium-zinc stabilizer and 1-2 parts of calcium stearate; the composite flame retardant is a mixture of poly (diphenoxyphosphazene) and magnesium hydroxide micropowder; the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxy phosphazene) is 1: (10-25).
By adopting the technical scheme, the composite flame retardant is a mixture of poly (diphenoxy phosphazene) and magnesium hydroxide micropowder, wherein the poly (diphenoxy phosphazene) takes phosphorus and nitrogen atoms which are alternately arranged as a framework, has the characteristics of higher thermal stability, flame retardance, high oxygen index, low smoke release and the like, and reduces the heat release rate. The magnesium hydroxide micro powder releases bound water when being heated and decomposed, absorbs a large amount of latent heat, reduces the surface temperature of the cable protective sleeve at high temperature, and has the effects of inhibiting the decomposition of polymers and cooling the generated combustible gas. The magnesium hydroxide micropowder has higher thermal stability, so that the thermal stability of the poly-diphenoxy phosphazene can be improved by the magnesium hydroxide micropowder, the dispersion uniformity of the magnesium hydroxide micropowder in the raw materials of the cable protective sleeve can be improved by the poly-diphenoxy phosphazene, the flame retardance of the cable protective sleeve can be further improved, fuming can be reduced, and the elongation at break of the cable protective sleeve can be improved.
The PVC resin is used as the main raw material of the cable protective sleeve, has low cost and good flexibility, and has higher corrosion resistance and mechanical property. The expanded graphite can generate an expansion reaction, a carbon layer is formed on the surface of the cable protective sleeve, and the carbon forming amount is increased, so that the flame retardant effect is improved. The active calcium carbonate is added as a filler, so that the mechanical property of the cable protective sleeve is improved, and in addition, the active calcium carbonate has the function of adsorbing ions, so that the free dissociation of conductive ions can be reduced, the insulation property of the volume resistivity of a product can be improved, and the mechanical property of a medium-voltage cable can be improved.
The calcium zinc stabilizer can improve the thermal stability of the PVC resin and prevent the thermal decomposition reaction of the PVC resin. The calcium stearate is added as a lubricant, and a thin isolating film can be formed between the molten material and the mould, so that the cable protective sleeve does not stick to the surface of the mould and is easy to demould.
Preferably, the method comprises the following steps: a flame-retardant cable protective sleeve comprises the following raw materials in parts by weight: 105-115 parts of PVC resin, 7-9 parts of composite flame retardant, 24-28 parts of expanded graphite, 44-48 parts of active calcium carbonate, 1.4-1.8 parts of calcium-zinc stabilizer and 1.4-1.8 parts of calcium stearate.
Preferably, the method comprises the following steps: the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxyphosphazene) is 1: (15-20).
By adopting the technical scheme, the flame retardance of the cable protective sleeve can be further improved by adjusting the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxyphosphazene).
Preferably, the method comprises the following steps: the magnesium hydroxide micro powder is obtained by modification treatment, and the modified magnesium hydroxide micro powder is prepared by the following steps:
mixing aluminum diethylphosphinate and sodium dodecyl benzene sulfonate in a mass ratio of 1: (3-5), and adding the mixture into an ethanol water solution with the mass concentration of 30-40% to obtain a mixed solution;
adding the magnesium hydroxide micro powder into the mixed solution at 70-90 ℃, uniformly stirring, drying and crushing to obtain modified magnesium hydroxide micro powder;
the mass ratio of the sodium dodecyl benzene sulfonate to the ethanol water solution is 1: (1-2).
By adopting the technical scheme, the magnesium hydroxide micro powder is modified by adopting the aluminum diethylphosphinate and the sodium dodecyl benzene sulfonate, so that the surface activation energy of the magnesium hydroxide micro powder is reduced, the magnesium hydroxide micro powder is prevented from precipitating, the stability of the magnesium hydroxide micro powder is improved, and the flame retardance of the magnesium hydroxide micro powder is improved.
Preferably, the method comprises the following steps: the mass ratio of the magnesium hydroxide micro powder to the mixed solution is 1: (5-7).
By adopting the technical scheme, the modification effect of the magnesium hydroxide micro powder can be further improved by adjusting the mass ratio of the magnesium hydroxide micro powder to the mixed solution.
Preferably, the method comprises the following steps: the flame-retardant cable protective sleeve further comprises the following raw materials in parts by weight: 1-5 parts of hydrated zinc borate micropowder and 5-15 parts of vinyl bis stearamide.
By adopting the technical scheme, the hydrated zinc borate micro powder has higher thermal stability and dispersibility, the flame retardant property of the cable protective sleeve can be effectively improved, and the smoke generated during combustion is reduced. The ethylene bis stearamide can improve the dispersibility of the hydrated zinc borate micropowder in the raw materials of the cable protective sleeve, so that the flame retardant effect of the hydrated zinc borate micropowder is improved.
Preferably, the method comprises the following steps: the weight ratio of the hydrated zinc borate micropowder to the vinyl bis-stearamide is 1 (5-10).
By adopting the technical scheme, the dispersion uniformity of the hydrated zinc borate micropowder in a cable protective sleeve system can be further improved by adjusting the weight part ratio of the hydrated zinc borate micropowder to the vinyl bis-stearamide, so that the flame retardant effect of the hydrated zinc borate micropowder is further improved.
Preferably, the method comprises the following steps: the flame-retardant cable protective sleeve further comprises the following raw materials in parts by weight: 1-3 parts of nano active kaolin.
By adopting the technical scheme, the nano active kaolin has a two-dimensional layered nano structure and a high flame retardant effect, and the flame retardant property of the cable protective sleeve can be further improved by adding the nano active kaolin and mixing with the active calcium carbonate.
In a second aspect, the invention provides a method for preparing any one of the flame retardant cable protective sheaths described above.
A preparation method of a flame-retardant cable protective sleeve comprises the following operation steps:
mixing the raw materials of the flame-retardant cable protective sleeve at 170-200 ℃, extruding and plasticizing to obtain the flame-retardant cable protective sleeve.
In a third aspect, the present invention provides a use of any one of the flame retardant cable sheaths described above in a medium voltage cable.
In summary, the present invention includes at least one of the following beneficial effects:
(1) According to the invention, by controlling the types and the mixing amount of the raw materials of the composite flame retardant, the limiting oxygen index of the medium-voltage cable is 32-40%, the horizontal combustion grade and the vertical combustion grade are FH-1 and FV-0 respectively, and the flame retardance of the medium-voltage cable is improved.
(2) According to the invention, the hydrated zinc borate micropowder and the vinyl bis-stearamide are added into the raw materials of the cable protective sleeve, and the weight part ratio of the hydrated zinc borate micropowder to the vinyl bis-stearamide is adjusted, so that the limited oxygen index of the medium-voltage cable is 42-43%, and the flame retardance of the medium-voltage cable is further improved.
(3) According to the invention, the nano active kaolin is added on the basis of adding the hydrated zinc borate micropowder and the vinyl bis-stearamide into the raw materials of the cable protective sleeve, and the doping amount is controlled, so that the limited oxygen index of the medium-voltage cable is 45%, and the flame retardance of the medium-voltage cable is further improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The following raw materials in the present invention are all commercially available products, and are all sufficient to disclose the raw materials of the present invention, and should not be construed as limiting the sources of the raw materials. The method comprises the following specific steps: PVC resin with the model of SG-5; expanded graphite with expansion multiple of 150-300 times; active calcium carbonate with the grain size of 600 meshes; the content of effective substances of the calcium-zinc stabilizer is 99.9 percent; calcium stearate with the content of effective substances of 99.9 percent; poly (diphenoxyphosphazene), the content of effective substances is 98%; the particle size of the magnesium hydroxide micro powder is 800 meshes; aluminum diethylphosphinate, the active substance content of which is 99.9%; sodium dodecyl benzene sulfonate, the content of active substance is 99%; the zinc borate hydrate micro powder has the effective substance content of 99.9 percent and the grain diameter of 600 meshes; vinyl bis stearamide, the content of effective substances is 99 percent; the nanometer active kaolin has a particle size of 6000 meshes.
The following are examples of the preparation of modified magnesium hydroxide fine powder
Preparation example 1
The modified magnesium hydroxide micropowder of preparation example 1 is prepared by the following steps:
mixing 1kg of aluminum diethylphosphinate and 4kg of sodium dodecylbenzenesulfonate, and adding the mixture to 6L of 35% ethanol aqueous solution to obtain a mixed solution;
adding 1.5kg of magnesium hydroxide micropowder into 6L of the mixed solution at the temperature of 80 ℃, uniformly stirring, drying and crushing to obtain the modified magnesium hydroxide micropowder.
Preparation examples 2 to 5
The modified magnesium hydroxide fine powders of production examples 2 to 5 were prepared in the same manner as in production example 1 except that 10kg of the magnesium hydroxide fine powder was added to the mixed solutions of 50L, 60L, 70L and 80L, respectively, and the rest was the same as in production example 1.
The following are examples of the preparation of composite flame retardants
Preparation example 6
The composite flame retardant of preparation example 6 was prepared by the following procedure: 1kg of polydiphenoxy phosphazene and 10kg of magnesium hydroxide micropowder are mixed and stirred uniformly to obtain the composite flame retardant.
Preparation examples 7 to 11
The preparation methods of the composite flame retardants of preparation examples 7 to 11 were different from that of preparation example 6 in that: the modified magnesium hydroxide micro powder prepared in preparation examples 1-5 is selected as the magnesium hydroxide micro powder, and the types and the mixing amount of the other raw materials are the same as those of preparation example 6.
Preparation example 12
The preparation method of the composite flame retardant of preparation example 12 is different from that of preparation example 9 in that 1kg of magnesium hydroxide fine powder is mixed with 15kg of polydiphenoxyphosphazene and the preparation operation is the same as that of preparation example 6.
Preparation example 13
The preparation method of the composite flame retardant of preparation example 13 is different from that of preparation example 9 in that 1kg of fine magnesium hydroxide powder is mixed with 18kg of polydiphenoxyphosphazene and the preparation procedure is the same as that of preparation example 6.
Preparation example 14
The preparation method of the composite flame retardant of preparation 14 is different from that of preparation 9 in that 1kg of magnesium hydroxide fine powder is mixed with 20kg of polydiphenoxyphosphazene and the preparation operation is the same as that of preparation 6.
Preparation example 15
The preparation method of the composite flame retardant of preparation example 15 is different from that of preparation example 9 in that 1kg of magnesium hydroxide fine powder is mixed with 25kg of polydiphenoxyphosphazene and the preparation operation is the same as that of preparation example 6.
Example 1
The flame-retardant cable protective sheath of example 1 was prepared by the following preparation method:
according to the mixing amount shown in the table 1, the raw materials of the flame-retardant cable protective sleeve are mixed at 200 ℃, extruded and plasticized to obtain the flame-retardant cable protective sleeve. Wherein the composite flame retardant prepared in preparation example 6 is selected as the composite flame retardant.
Examples 2 to 3
The preparation method of the flame-retardant cable protective sleeve of the embodiment 2-3 is the same as that of the embodiment 1, except that the mixing amount of the raw materials is different, and the details are shown in the table 1.
Table 1 examples 1-3 amount (kg) of each material for flame retardant cable sheath
Examples 4 to 12
The preparation method of the flame-retardant cable protective sleeve of the embodiment 4-12 is the same as that of the embodiment 2, except that the composite flame retardant prepared in the preparation embodiments 7-15 is selected as the composite flame retardant, and the types and the mixing amount of the other raw materials are the same as those of the embodiment 2.
Examples 13 to 17
The preparation method of the flame-retardant cable protective sleeve of the embodiment 13-17 is the same as that of the embodiment 10, except that the cable protective sleeve raw material further comprises hydrated zinc borate micropowder and vinyl bis stearamide, and the specific mixing amount is shown in table 2.
TABLE 2 examples 13-17 flame retardant cable jacketing with various raw material loadings (kg)
Examples 18 to 20
The preparation method of the flame-retardant cable protective sleeve of the embodiment 18-20 is the same as that of the embodiment 15, except that the cable protective sleeve raw material further comprises nano active kaolin, and the specific content is shown in table 3.
TABLE 3 examples 18-20 flame retardant cable jacketing with various raw material loadings (kg)
Comparative example 1
The preparation method of the flame-retardant cable protective sheath of comparative example 1 is the same as that of example 1, except that the composite flame retardant is not added, and the types and the mixing amounts of the other raw materials are the same as those of example 1.
Comparative example 2
The preparation method of the flame-retardant cable protective sleeve of the comparative example 2 is the same as that of the example 1, except that the poly (diphenoxyphosphazene) in the composite flame retardant is replaced by the magnesium hydroxide micropowder with equal quantity, and the types and the doping amount of the other raw materials are the same as those of the example 1.
Comparative example 3
The preparation method of the flame-retardant cable protective sleeve of the comparative example 3 is the same as that of the example 1, except that the magnesium hydroxide micropowder in the composite flame retardant is replaced by the poly (diphenoxyphosphazene) in equal amount, and the types and the doping amount of the other raw materials are the same as those of the example 1.
Comparative example 4
The preparation method of the flame retardant cable sheath of comparative example 4 is the same as that of example 1 except that the expanded graphite is not added and the kind and the amount of the remaining raw materials are the same as those of example 1.
Comparative example 5
The preparation method of the flame retardant cable protective sheath of comparative example 5 is the same as that of example 1 except that the activated calcium carbonate is replaced with barium sulfate in equal amount and the kinds and mixing amounts of the remaining raw materials are the same as those of example 1.
Comparative example 6
The preparation method of the flame-retardant cable protective sheath of comparative example 6 is the same as that of example 1, except that the poly (diphenoxy) phosphazene in the composite flame retardant is replaced by pentafluoro (phenoxy) cyclotriphosphazene in equal amount, and the kinds and the mixing amounts of the other raw materials are the same as those of example 1.
The following is the application of the flame-retardant cable protective sleeve in the medium-voltage cable
Application example 1
The cable jacket obtained in example 1 was extruded and wrapped outside the cable core to obtain a medium voltage cable. Wherein the cable core is a copper core fire-resistant cable with the model of YJV22.
Application examples 2 to 20
Application examples 2 to 20 the application method of the flame-retardant cable protective sleeve in the medium-voltage cable is the same as that of application example 1, except that the flame-retardant cable protective sleeve obtained in the embodiments 2 to 20 is selected as the flame-retardant cable protective sleeve, and the rest of the operations are the same as those of application example 1.
Comparative examples 1 to 6 of application
The application method of the flame-retardant cable protective sleeve applied to the medium-voltage cable in the comparative examples 1 to 6 is the same as that in the application example 1, except that the flame-retardant cable protective sleeve obtained in the comparative examples 1 to 6 is used as the flame-retardant cable protective sleeve, and the rest of the operation is the same as that in the application example 1.
Performance detection
The following detection standards or methods are adopted to respectively carry out performance detection on the medium voltage cables obtained in the application examples 1-20 and the application comparative examples 1-6, and the detection results are detailed in table 4.
Tensile strength: the tensile strength of medium voltage cables was tested according to GB/T1040-92.
Elongation at break: the elongation at break of medium voltage cables was tested according to GB/T1040-92.
Limiting oxygen index: and detecting the limiting oxygen index of the medium-voltage cable by using an oxygen index tester according to GB/T2406.2-2009.
Horizontal and vertical combustion: the horizontal and vertical burning grades of medium voltage cables were tested according to GB/T2408-1996.
Table 4 different medium voltage cable performance test results
The detection results in table 4 show that the tensile strength and the elongation at break of the medium-voltage cable obtained by using the cable protective sleeve obtained by the invention are respectively 12.0MPa and 273%, and the medium-voltage cable has high mechanical properties; and the maximum limit oxygen index of the medium-voltage cable can reach 45%, the horizontal combustion grade and the vertical combustion grade are FH-1 and FV-0 respectively, and the flame retardance of the medium-voltage cable is improved.
In application examples 1-3, the limited oxygen index of the medium voltage cable in application example 2 is 34% and higher than that in application examples 1 and 3, which indicates that the mixing amount of the composite flame retardant in the cable protective sleeve in example 2 is relatively proper, and the flame retardance of the medium voltage cable is improved. The flame-retardant polyphenyl amine composite material has the advantages that the flame-retardant polyphenyl amine composite material is possibly higher in thermal stability with magnesium hydroxide micro powder, the thermal stability of the polydiphenoxy phosphazene can be improved by the magnesium hydroxide micro powder, the uniform dispersion of magnesium hydroxide in the raw materials of the cable protective sleeve can be improved by the polydiphenoxy phosphazene, the flame retardance of the cable protective sleeve can be further improved, fuming can be reduced, and the fracture elongation and the impact strength of the cable protective sleeve are improved.
In application examples 4 to 8, the limited oxygen index of the medium voltage cable in application examples 5 to 7 is 36 to 37 percent, which is higher than that in application example 4 and application example 8, and shows that the mass ratio of the magnesium hydroxide micro powder to the mixed solution is 1: (5-7) is preferable, and the flame retardancy of the medium voltage cable is improved. Probably related to the mass ratio of the magnesium hydroxide micropowder to the mixed solution, and the modification effect of the magnesium hydroxide micropowder can be further improved.
In application examples 9 to 12, the limited oxygen index of the medium voltage cable in application examples 9 to 11 is 38 to 40 percent, which is higher than that in application example 9 and application examples 11 to 12, and shows that the mass ratio of the magnesium hydroxide micro powder to the poly-diphenoxyphosphazene is 1: (15-20) is preferable, and the flame retardancy of the medium voltage cable is improved. The flame retardant has the advantages that the flame retardant possibly has higher thermal stability with the magnesium hydroxide micro powder, the thermal stability of the poly-diphenoxy phosphazene can be improved by the magnesium hydroxide micro powder, the uniform dispersion of the magnesium hydroxide in the raw materials of the cable protective sleeve can be improved by the poly-diphenoxy phosphazene, the mass ratio of the magnesium hydroxide micro powder to the poly-diphenoxy phosphazene is adjusted, the flame retardance of the cable protective sleeve can be further improved, fuming can be reduced, and the breaking elongation and the impact strength of the cable protective sleeve are improved.
In application examples 13-17, the limited oxygen index of the medium-voltage cable in application examples 14-16 is 42-43% which is higher than that in application example 13 and application example 17, and the ratio of the hydrated zinc borate micropowder to the vinyl bis-stearamide in parts by weight is 1 (5-10), so that the flame retardance of the medium-voltage cable is improved. The method is probably related to that the ethylene bis stearamide can improve the dispersibility of the hydrated zinc borate micropowder in the raw materials of the cable protective sleeve, so that the flame retardant effect of the hydrated zinc borate micropowder is further improved.
In application examples 18-20, the limited oxygen index of the medium voltage cable in application example 19 is 45% and higher than that in application example 13 and application example 17, which indicates that the doping amount of the nano active kaolin in the cable protective sleeve is relatively proper, and the flame retardance of the medium voltage cable is improved. The flame retardant coating may have a two-dimensional layered nano structure with nano active kaolin, has a high flame retardant effect, and can be mixed with active calcium carbonate to further improve the flame retardant property of the cable protective sleeve.
In addition, by combining various index data of the medium-voltage cable in application comparative examples 1-6 and application example 1, the flame retardance of the cable protective sleeve can be improved to different degrees by adding the composite flame retardant, the expanded graphite and the active calcium carbonate into the raw material of the cable protective sleeve.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The flame-retardant cable protective sleeve is characterized by comprising the following raw materials in parts by weight: 100-120 parts of PVC resin, 6-10 parts of composite flame retardant, 20-30 parts of expanded graphite, 40-50 parts of active calcium carbonate, 1-2 parts of calcium-zinc stabilizer and 1-2 parts of calcium stearate; the composite flame retardant is a mixture of poly (diphenoxyphosphazene) and magnesium hydroxide micropowder; the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxyphosphazene) is 1: (10-25).
2. The flame retardant cable protective sheath according to claim 1, characterized in that it comprises the following raw materials in parts by weight: 105-115 parts of PVC resin, 7-9 parts of composite flame retardant, 24-28 parts of expanded graphite, 44-48 parts of active calcium carbonate, 1.4-1.8 parts of calcium-zinc stabilizer and 1.4-1.8 parts of calcium stearate.
3. The flame retardant cable protective sheath of claim 1 wherein: the mass ratio of the magnesium hydroxide micro powder to the poly (diphenoxy phosphazene) is 1: (15-20).
4. The flame retardant cable protective sheath according to claim 1, wherein the magnesium hydroxide micropowder is obtained by modification treatment, and the specific modification treatment operation is as follows:
mixing aluminum diethylphosphinate and sodium dodecyl benzene sulfonate in a mass ratio of 1: (3-5), and adding the mixture into an ethanol water solution with the mass concentration of 30-40% to obtain a mixed solution;
adding the magnesium hydroxide micro powder into the mixed solution at 70-90 ℃, uniformly stirring, drying and crushing to obtain modified magnesium hydroxide micro powder;
the mass ratio of the sodium dodecyl benzene sulfonate to the ethanol water solution is 1: (1-2).
5. The flame retardant cable protective sheath according to claim 4, wherein: the mass ratio of the magnesium hydroxide micro powder to the mixed solution is 1: (5-7).
6. The flame retardant cable protective sheath according to claim 1, further comprising the following raw materials in parts by weight: 1-3 parts of hydrated zinc borate micropowder and 5-15 parts of vinyl bis stearamide.
7. The flame-retardant cable protective sleeve according to claim 6, wherein the weight ratio of the hydrated zinc borate micropowder to the vinyl bis-stearamide is 1 (5-10).
8. The flame retardant cable protective sheath of claim 1 wherein: the flame-retardant cable protective sleeve further comprises the following raw materials in parts by weight: 1-3 parts of nano active kaolin.
9. A process for the preparation of a flame retardant cable sheath according to any one of claims 1 to 8, characterized in that it comprises the following operating steps:
mixing the raw materials of the flame-retardant cable protective sleeve at 170-200 ℃, extruding and plasticizing to obtain the flame-retardant cable protective sleeve.
10. Use of a flame retardant cable sheath according to any one of claims 1 to 8 in a medium voltage cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310020759.5A CN115746480B (en) | 2023-01-07 | 2023-01-07 | Flame-retardant cable protective sleeve, preparation method thereof and medium-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310020759.5A CN115746480B (en) | 2023-01-07 | 2023-01-07 | Flame-retardant cable protective sleeve, preparation method thereof and medium-voltage cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115746480A true CN115746480A (en) | 2023-03-07 |
| CN115746480B CN115746480B (en) | 2023-05-16 |
Family
ID=85348351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310020759.5A Active CN115746480B (en) | 2023-01-07 | 2023-01-07 | Flame-retardant cable protective sleeve, preparation method thereof and medium-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115746480B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241545A (en) * | 2001-02-20 | 2002-08-28 | Kanegafuchi Chem Ind Co Ltd | Flame-retardant resin composition and flame-retardant electric wire or cable |
| CN105566785A (en) * | 2016-02-02 | 2016-05-11 | 繁昌县菲德通讯材料设计有限公司 | Flame-retardant anti-impact modified linear low-density polyethylene cable sheath material |
| CN109285618A (en) * | 2018-09-25 | 2019-01-29 | 青岛长城巨龙电缆有限公司 | High fire-retardance fire resisting low-smoke halogen-free cable and preparation method thereof |
| CN112063068A (en) * | 2020-08-05 | 2020-12-11 | 百通达科技（东台）有限公司 | High-temperature-resistant polyvinyl chloride gloves and preparation process thereof |
| CN112280211A (en) * | 2020-10-21 | 2021-01-29 | 中广核三角洲（中山）高聚物有限公司 | PVC cable material with good carbon forming property and preparation method thereof |
-
2023
- 2023-01-07 CN CN202310020759.5A patent/CN115746480B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002241545A (en) * | 2001-02-20 | 2002-08-28 | Kanegafuchi Chem Ind Co Ltd | Flame-retardant resin composition and flame-retardant electric wire or cable |
| CN105566785A (en) * | 2016-02-02 | 2016-05-11 | 繁昌县菲德通讯材料设计有限公司 | Flame-retardant anti-impact modified linear low-density polyethylene cable sheath material |
| CN109285618A (en) * | 2018-09-25 | 2019-01-29 | 青岛长城巨龙电缆有限公司 | High fire-retardance fire resisting low-smoke halogen-free cable and preparation method thereof |
| CN112063068A (en) * | 2020-08-05 | 2020-12-11 | 百通达科技（东台）有限公司 | High-temperature-resistant polyvinyl chloride gloves and preparation process thereof |
| CN112280211A (en) * | 2020-10-21 | 2021-01-29 | 中广核三角洲（中山）高聚物有限公司 | PVC cable material with good carbon forming property and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 钱立军，邱勇，王佩璋: "《塑料配混工（中、高级）培训教程》", 中国轻工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115746480B (en) | 2023-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Processing, thermal conductivity and flame retardant properties of silicone rubber filled with different geometries of thermally conductive fillers: A comparative study | |
| Liu et al. | Synergistic flame retardant effects between hollow glass microspheres and magnesium hydroxide in ethylene-vinyl acetate composites | |
| CN104893088B (en) | Ultraviolet light crosslinking low-smoke zero-halogen flame-retardant cable material and preparation method thereof | |
| CN101205324B (en) | Halogen-free flame-retardant electric wire and cable sheath polymer material and uses thereof | |
| Song et al. | Preparation and properties of halogen-free flame-retarded polyamide 6/organoclay nanocomposite | |
| CN100369968C (en) | Radiation cross-linked low-smoke halogen-free phosphor-free nanometer flame retardant thermal shrinkage material and method for preparing the same | |
| CN102093626B (en) | Non-halogen fire resistant low-temperature shrinkable and heat-shrinkable pipe material and preparation method thereof | |
| CN103897246B (en) | A kind of cracking resistance low-smoke zero-halogen flame-retarding optical cable sheath material | |
| CN106916362B (en) | Halogen-free flame-retardant polyolefin resin and preparation method thereof | |
| CA2990358A1 (en) | Compositions, additives, and compounds for melt processable, foamable, and cellular fluoropolymers | |
| CN102219978A (en) | Halogen-free flame retardant polyolefin elastomer composition used for cover material of wires and cables | |
| Niu et al. | The structure of microencapsulated carbon microspheres and its flame retardancy in poly (ethylene terephthalate) | |
| CN103897245A (en) | Method for preparing anti-crack low-smoke and halogen-free optical cable flame-retardant sheath material | |
| Kang et al. | Effect of hollow glass microsphere on the flame retardancy and combustion behavior of intumescent flame retardant polypropylene composites | |
| CN108239315B (en) | Halogen-free thermoplastic elastomer cable material for electric vehicle charging pile cable and preparation method thereof | |
| CN101220191B (en) | Grease-proof, heat-resistant expansion type flame-proof rubber | |
| CN107236226A (en) | A kind of CABLE MATERIALS with anti-flaming function and preparation method thereof | |
| CN105086327A (en) | Manufacturing technology of shielded cable capable of working for long time at temperature of 95 DEG C | |
| Bee et al. | Interactive effect of ammonium polyphosphate and montmorillonite on enhancing flame retardancy of polycarbonate/acrylonitrile butadiene styrene composites | |
| CN105367882A (en) | Flexible chemical crosslinking low-smoke zero-halogen flame-retardant polyolefin sheathing material and preparation method | |
| CN101659778A (en) | Expanded halogen-free flame-retardant ABS compound material | |
| CN113372644A (en) | High-flame-retardant cross-linked low-smoke halogen-free polyolefin insulating material and preparation method thereof | |
| Yan et al. | Design, synthesis and application of a highly efficient mono-component intumescent flame retardant for non-charring polyethylene composites | |
| CN104194145A (en) | Environment-friendly nano modified halogen-free flame retardant polypropylene and preparation method thereof | |
| CN113248813B (en) | Efficient halogen-free flame-retardant cable material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |