CN109801754B - Copper core mica tape mineral insulation corrugated copper sheath power cable - Google Patents
Copper core mica tape mineral insulation corrugated copper sheath power cable Download PDFInfo
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Abstract
The invention relates to the technical field of fireproof cables, and discloses a copper core mica tape mineral insulation corrugated copper sheath power cable which sequentially comprises a conductor, an insulation layer, a protection layer, a metal sheath and an outer sheath from inside to outside; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: high-density polyethylene, low-density polyethylene, ethylene-octene copolymer, composite flame retardant, diatomite, silane coupling agent KH-550, maleic anhydride, antioxidant 1010, antioxidant 168, PE wax, calcium stearate, trioctyl trimellitate and dicumyl peroxide. The invention has excellent fireproof performance, can prevent flame from burning out the cable when a fire disaster happens, and enables the cable to keep normal operation on the fire scene, thereby avoiding unnecessary property loss and casualties.
Description
Technical Field
The invention relates to the technical field of fireproof cables, in particular to a copper core mica tape mineral insulation corrugated copper sheath power cable.
Background
With the acceleration of industrialization and urbanization, various fire accidents frequently occur, and great loss of lives and properties is caused. Furthermore, with the increasing awareness of fire protection, fire-resistant cables must be selected for different purposes in some electrical distribution lines in developed countries. The domestic electric power department also popularizes and uses the fireproof cable in high-rise buildings and entertainment places in cities. The fireproof cable generally comprises a conductor, an insulating layer, a protective layer, a metal sheath and an outer sheath, wherein the outer sheath is used as a first protective layer in the case of fire, so that high requirements are put forward on the flame retardant property of the fireproof cable.
Disclosure of Invention
Based on the problems in the prior art, the invention provides the copper core mica tape mineral insulation corrugated copper sheath power cable which has excellent fireproof performance, can prevent flame from burning out the cable when a fire disaster happens, and enables the cable to keep normal operation on the fire scene, thereby avoiding unnecessary property loss and casualties.
The invention provides a copper core mica tape mineral insulation corrugated copper sheath power cable which sequentially comprises a conductor, an insulation layer, a protective layer, a metal sheath and an outer sheath from inside to outside; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 50-70 parts of high-density polyethylene, 20-30 parts of low-density polyethylene, 40-50 parts of ethylene-octene copolymer, 40-60 parts of composite flame retardant, 5-10 parts of diatomite, 2-4 parts of silane coupling agent KH-550, 1-2 parts of maleic anhydride, 10100.3-1.2 parts of antioxidant, 1680.2-1.4 parts of antioxidant, 0.2-1 part of PE wax, 0.1-0.8 part of calcium stearate, 2-4 parts of trioctyl trimellitate and 0.3-1.2 parts of dicumyl peroxide.
Preferably, the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 6-10: 3-8.
Preferably, the modified magnesium hydroxide is prepared as follows: dispersing magnesium hydroxide powder in water, adding sodium oleate, polyethylene glycol and sodium stearate while stirring, controlling the temperature at 70-75 ℃, stirring for reaction for 80-100min, filtering, washing the product with water for 3-5 times, drying, crushing and sieving with a 80-mesh sieve to obtain the modified magnesium hydroxide.
Preferably, the mass ratio of the magnesium hydroxide powder, the water, the sodium oleate, the polyethylene glycol and the sodium stearate is 80-100:1800-2000:2-3:2-3: 4-6.
Preferably, the modified expanded graphite is prepared as follows: adding 100-mesh and 150-mesh natural graphite into a 72-75 wt% sulfuric acid solution, adding sodium tripolyphosphate and potassium permanganate while stirring, controlling the temperature to be 38-40 ℃, reacting for 30-40min, washing the product with water after the reaction is finished until the washing waste liquid is neutral, and finally drying at 50-55 ℃ to constant weight to obtain the modified expanded graphite.
Preferably, the mass ratio of the natural graphite to the sulfuric acid solution to the sodium tripolyphosphate to the potassium permanganate is 8-10: 30-38: 5-6:5-6.
Preferably, the outer sheath is prepared as follows: all the raw materials are proportioned according to the proportion, and then are subjected to mixing, extrusion granulation and drying processes to prepare granules; and adding the granules into a basic forming machine for forming, sizing, drawing and cutting to obtain the outer sheath.
The natural graphite is modified by sulfuric acid, sodium tripolyphosphate and potassium permanganate, and the prepared modified expanded graphite can form a fluffy expanded carbon layer on the surface of the cable in the combustion process, and the carbon layer can protect the cable, isolate the cable from an external heat source and air and play a good flame-retardant role. Magnesium hydroxide is an inorganic flame retardant with excellent flame retardant effect, but the compatibility of magnesium hydroxide and a polyolefin resin matrix is poor, and a large amount of magnesium hydroxide needs to be used to meet the required flame retardant requirement, so that the magnesium hydroxide is subjected to surface modification by taking sodium oleate, polyethylene glycol and sodium stearate as composite modifiers, the modifiers are adsorbed on the surfaces of magnesium hydroxide particles to form microcells, the particles are repelled, the dispersibility and compatibility of the magnesium hydroxide in the polyolefin resin can be improved, and the flame retardant property is improved. According to the invention, the modified expanded graphite and the modified magnesium hydroxide are compounded, and are mixed with high-density polyethylene, low-density polyethylene, an ethylene-octene copolymer, diatomite, a silane coupling agent KH-550, maleic anhydride, an antioxidant 1010, an antioxidant 168, PE wax, calcium stearate, trioctyl trimellitate and dicumyl peroxide to prepare the outer sheath.
The mica tape mineral insulation corrugated copper sheath power cable with the copper core has excellent fireproof performance, and can prevent flame from burning out the cable when a fire disaster happens, so that the cable can keep normal operation on the fire scene, and unnecessary property loss and casualties are avoided.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following specific examples.
Example 1
A copper core mica tape mineral insulation corrugated copper sheath power cable comprises a conductor, an insulation layer, a protection layer, a metal sheath and an outer sheath from inside to outside in sequence; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 50 parts of high-density polyethylene, 30 parts of low-density polyethylene, 40 parts of ethylene-octene copolymer, 60 parts of composite flame retardant, 5 parts of diatomite, KH-5504 parts of silane coupling agent, 1 part of maleic anhydride, 10101.2 parts of antioxidant, 1680.2 parts of antioxidant, 1 part of PE wax, 0.1 part of calcium stearate, 4 parts of trioctyl trimellitate and 0.3 part of dicumyl peroxide; the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 10: 3.
Example 2
A copper core mica tape mineral insulation corrugated copper sheath power cable comprises a conductor, an insulation layer, a protection layer, a metal sheath and an outer sheath from inside to outside in sequence; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 70 parts of high-density polyethylene, 20 parts of low-density polyethylene, 50 parts of ethylene-octene copolymer, 40 parts of composite flame retardant, 10 parts of diatomite, KH-5502 parts of silane coupling agent, 2 parts of maleic anhydride, 10100.3 parts of antioxidant, 1681.4 parts of antioxidant, 0.2 part of PE wax, 0.8 part of calcium stearate, 2 parts of trioctyl trimellitate and 1.2 parts of dicumyl peroxide; the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 6: 8.
Example 3
A copper core mica tape mineral insulation corrugated copper sheath power cable comprises a conductor, an insulation layer, a protection layer, a metal sheath and an outer sheath from inside to outside in sequence; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 60 parts of high-density polyethylene, 25 parts of low-density polyethylene, 44 parts of ethylene-octene copolymer, 50 parts of composite flame retardant, 8 parts of diatomite, KH-5503 parts of silane coupling agent, 1 part of maleic anhydride, 10100.8 parts of antioxidant, 1680.7 parts of antioxidant, 0.6 part of PE wax, 0.5 part of calcium stearate, 3 parts of trioctyl trimellitate and 0.9 part of dicumyl peroxide; the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 8: 5.
The modified magnesium hydroxide is prepared by the following steps: dispersing magnesium hydroxide powder in water, adding sodium oleate, polyethylene glycol and sodium stearate while stirring, controlling the temperature at 70 ℃, stirring for reaction for 100min, filtering, washing the product with water for 3 times, drying, crushing and sieving with a 80-mesh sieve to obtain modified magnesium hydroxide; the mass ratio of the magnesium hydroxide powder to the water to the sodium oleate to the polyethylene glycol to the sodium stearate is 100:1800:3:2: 6.
Preparing modified expanded graphite: adding 100-mesh natural graphite into a 75 wt% sulfuric acid solution, adding sodium tripolyphosphate and potassium permanganate while stirring, controlling the temperature to be 38 ℃, reacting for 40min, washing a product with water after the reaction is finished until washing waste liquid is neutral, and finally drying at 50 ℃ until constant weight is achieved to obtain modified expanded graphite; the mass ratio of the natural graphite to the sulfuric acid solution to the sodium tripolyphosphate to the potassium permanganate is 10: 30: 6:5.
Preparing an outer sheath: all the raw materials are proportioned according to the proportion, and then are subjected to mixing, extrusion granulation and drying processes to prepare granules; and adding the granules into a basic forming machine for forming, sizing, drawing and cutting to obtain the outer sheath.
Example 4
A copper core mica tape mineral insulation corrugated copper sheath power cable comprises a conductor, an insulation layer, a protection layer, a metal sheath and an outer sheath from inside to outside in sequence; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 70 parts of high-density polyethylene, 20 parts of low-density polyethylene, 50 parts of ethylene-octene copolymer, 40 parts of composite flame retardant, 10 parts of diatomite, KH-5502 parts of silane coupling agent, 2 parts of maleic anhydride, 10100.3 parts of antioxidant, 1681.4 parts of antioxidant, 0.2 part of PE wax, 0.8 part of calcium stearate, 2 parts of trioctyl trimellitate and 1.2 parts of dicumyl peroxide; the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 6: 8.
The modified magnesium hydroxide is prepared by the following steps: dispersing magnesium hydroxide powder in water, adding sodium oleate, polyethylene glycol and sodium stearate while stirring, controlling the temperature at 75 ℃, stirring for 80min, filtering, washing the product with water for 5 times, drying, crushing and sieving with a 80-mesh sieve to obtain modified magnesium hydroxide; the mass ratio of the magnesium hydroxide powder to the water to the sodium oleate to the polyethylene glycol to the sodium stearate is 80:2000:2:3: 4.
Preparing modified expanded graphite: adding 150-mesh natural graphite into a 72 wt% sulfuric acid solution, adding sodium tripolyphosphate and potassium permanganate while stirring, controlling the temperature at 40 ℃, reacting for 30min, washing the product with water after the reaction is finished until the washing waste liquid is neutral, and finally drying at 55 ℃ until the weight is constant, thus obtaining the modified expanded graphite; the mass ratio of the natural graphite to the sulfuric acid solution to the sodium tripolyphosphate to the potassium permanganate is 8: 38: 5:6.
Preparing an outer sheath: all the raw materials are proportioned according to the proportion, and then are subjected to mixing, extrusion granulation and drying processes to prepare granules; and adding the granules into a basic forming machine for forming, sizing, drawing and cutting to obtain the outer sheath.
Examples of the experiments
The flame retardancy of the outer sheath prepared according to the present invention was measured, and the results are shown in the following table:
TABLE 1 flame retardancy test results of the outer jacket
| Example 1 | Example 2 | Example 3 | Example 4 | Test standard | |
| Flame retardant rating | A | A | A | A | GB12666.5 |
| Oxygen index | 41 | 37 | 39 | 42 | GB/T2406-1993 |
As can be seen from the above table, the outer sheath prepared by the present invention has excellent flame retardancy.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A copper core mica tape mineral insulation corrugated copper sheath power cable is characterized in that a conductor, an insulation layer, a protective layer, a metal sheath and an outer sheath are sequentially arranged from inside to outside; the conductor material is copper; the insulating layer is made of calcined mica tapes; the protective layer material is a low-smoke halogen-free high-flame-retardant belt; the metal sheath material is corrugated copper; the raw materials for preparing the outer sheath comprise the following components in parts by weight: 50-70 parts of high-density polyethylene, 20-30 parts of low-density polyethylene, 40-50 parts of ethylene-octene copolymer, 40-60 parts of composite flame retardant, 5-10 parts of diatomite, 2-4 parts of silane coupling agent KH-550, 1-2 parts of maleic anhydride, 10100.3-1.2 parts of antioxidant, 1680.2-1.4 parts of antioxidant, 0.2-1 part of PE wax, 0.1-0.8 part of calcium stearate, 2-4 parts of trioctyl trimellitate and 0.3-1.2 parts of dicumyl peroxide;
the composite flame retardant consists of modified magnesium hydroxide and modified expanded graphite according to the mass ratio of 6-10: 3-8;
wherein, the modified magnesium hydroxide is prepared by the following method: dispersing magnesium hydroxide powder in water, adding sodium oleate, polyethylene glycol and sodium stearate while stirring, controlling the temperature at 70-75 ℃, stirring for reaction for 80-100min, filtering, washing the product with water for 3-5 times, drying, crushing and sieving with a 80-mesh sieve to obtain modified magnesium hydroxide;
wherein, the modified expanded graphite is prepared by the following method: adding 100-mesh and 150-mesh natural graphite into a 72-75 wt% sulfuric acid solution, adding sodium tripolyphosphate and potassium permanganate while stirring, controlling the temperature to be 38-40 ℃, reacting for 30-40min, washing the product with water after the reaction is finished until the washing waste liquid is neutral, and finally drying at 50-55 ℃ to constant weight to obtain the modified expanded graphite.
2. The cable according to claim 1, wherein the mass ratio of the magnesium hydroxide powder, water, sodium oleate, polyethylene glycol and sodium stearate is 80-100: 1800-.
3. The cable according to claim 1, wherein the mass ratio of the natural graphite to the sulfuric acid solution to the sodium tripolyphosphate to the potassium permanganate is 8-10: 30-38: 5-6:5-6.
4. A cable according to any one of claims 1 to 3, wherein the outer sheath is prepared as follows: all the raw materials are proportioned according to the proportion, and then are subjected to mixing, extrusion granulation and drying processes to prepare granules; and adding the granules into a basic forming machine for forming, sizing, drawing and cutting to obtain the outer sheath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811632064.8A CN109801754B (en) | 2018-12-29 | 2018-12-29 | Copper core mica tape mineral insulation corrugated copper sheath power cable |
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| CN201811632064.8A CN109801754B (en) | 2018-12-29 | 2018-12-29 | Copper core mica tape mineral insulation corrugated copper sheath power cable |
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| CN109801754B true CN109801754B (en) | 2020-08-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114262502A (en) * | 2021-12-03 | 2022-04-01 | 帝高力装饰材料（江苏）有限公司 | PET flame-retardant floor and preparation method thereof |
| CN114822960B (en) * | 2022-05-14 | 2023-07-18 | 天环线缆集团有限公司 | Medium-voltage copper core power cable with good insulation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105419072A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Flexible low-smoke halogen-free flame-retardant wire and cable material and preparation method thereof |
| CN105585006A (en) * | 2014-10-24 | 2016-05-18 | 江阴碳谷科技有限公司 | A graphite expanding and heating device and a process thereof |
| CN105885188A (en) * | 2016-05-03 | 2016-08-24 | 山东泰开高分子材料有限公司 | Preparation and using method of chemical crosslinking low-smoke halogen-free flame-retardant polyolefin composite material |
| CN106847385A (en) * | 2017-03-27 | 2017-06-13 | 湖北龙腾红旗电缆(集团)有限公司 | Skyscraper mineral insulated cable |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585006A (en) * | 2014-10-24 | 2016-05-18 | 江阴碳谷科技有限公司 | A graphite expanding and heating device and a process thereof |
| CN105419072A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Flexible low-smoke halogen-free flame-retardant wire and cable material and preparation method thereof |
| CN105885188A (en) * | 2016-05-03 | 2016-08-24 | 山东泰开高分子材料有限公司 | Preparation and using method of chemical crosslinking low-smoke halogen-free flame-retardant polyolefin composite material |
| CN106847385A (en) * | 2017-03-27 | 2017-06-13 | 湖北龙腾红旗电缆(集团)有限公司 | Skyscraper mineral insulated cable |
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