CN110760190A - Fire-resistant communication cable - Google Patents
Fire-resistant communication cable Download PDFInfo
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- CN110760190A CN110760190A CN201810833548.2A CN201810833548A CN110760190A CN 110760190 A CN110760190 A CN 110760190A CN 201810833548 A CN201810833548 A CN 201810833548A CN 110760190 A CN110760190 A CN 110760190A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2262—Oxides; Hydroxides of metals of manganese
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention discloses a fire-resistant communication cable which comprises 4 copper-magnesium alloy conductors 1, wherein the outer surface of each copper-magnesium alloy conductor 1 is coated with a polyethylene layer 2 to form a lead 3, the 4 leads 3 are twisted pairwise to form a first twisted pair 41 and a second twisted pair 42, a ceramic silicon rubber sheath layer 7 is coated on the outer surface of a polyvinyl chloride layer 6, and the ceramic silicon rubber sheath layer 7 comprises the following components in parts by weight: 70-90 parts of methyl vinyl silicone rubber, 10-20 parts of ethylene methacrylic acid copolymer, 4-8 parts of vinyl trimethoxy silane, 12-15 parts of glass powder, 5-10 parts of boron nitride, 5-15 parts of magnesium oxide, 8-15 parts of fumed silica, 1-5 parts of isopropyl titanate, 0.5-2 parts of dicumyl peroxide, 1-5 parts of methyl phenyl diethoxy silane, 0.4-0.8 part of 1, 3-dimethyl-6-semicarbazide pyrimidine, 0.5-1 part of manganese dioxide, 3-15 parts of 1, 6-di (diphenyl phosphine group) hexane and 1-2 parts of antioxidant. The fire-resistant communication cable further improves the insulativity and the fire resistance of the ceramic silicon rubber sheath layer, thereby enhancing the insulativity and the fire resistance of the cable.
Description
Technical Field
The invention relates to a communication cable, in particular to a fire-resistant communication cable.
Background
The power cable for communication is required to have not only good flexibility for easy laying in a narrow space or the like, but also desirable flame retardancy for use in applications where the fire-retardant rating is severe. Due to the structural particularity of the silicone rubber, the silicone rubber has excellent properties such as aging resistance, high and low temperature resistance, weather resistance, solvent resistance, electrical insulation property, inertia to external heat flow, relatively low heat release rate and the like, so that the silicone rubber is widely applied to the fields of cables, electric wires, aerospace, automobiles, chemical engineering and the like. In the prior art, the ceramic filler and the sintering aid are added into the silicon rubber to prepare the ceramic silicon rubber composite material for mould pressing or extrusion molding, the material can be sintered into a ceramic body in a high-temperature furnace or flame, and the ceramic silicon rubber composite material has various excellent properties at normal temperature. However, the existing ceramic cable has many defects in the using process, a ceramic structure can be formed only at a high temperature, and the ceramic cable is unstable in structure, poor in tensile resistance and impact resistance and incapable of achieving a good insulating function. How to solve the above technical problems becomes the direction of efforts of those skilled in the art.
Disclosure of Invention
The invention provides a fire-resistant communication cable which can prevent oxygen from permeating into the fire-resistant communication cable, and further improves the insulativity and the fire resistance of a ceramic silicon rubber sheath layer, so that the insulativity and the fire resistance of the cable are enhanced.
In order to achieve the purpose, the invention adopts the technical scheme that: a fire-resistant communication cable comprises 4 copper-magnesium alloy conductors, wherein the outer surfaces of the copper-magnesium alloy conductors are coated with polyethylene layers to form wires, the 4 wires are twisted in pairs to form a first twisted wire pair and a second twisted wire pair, an aluminum foil is wrapped on the outer surfaces of the twisted wire pairs, a polyvinyl chloride layer is coated on the outer surface of the aluminum foil, and a ceramic silicon rubber sheath layer is coated on the outer surface of the polyvinyl chloride layer;
the ceramic silicon rubber sheath layer comprises the following components in parts by weight:
70-90 parts of methyl vinyl silicone rubber,
10-20 parts of ethylene methacrylic acid copolymer,
4-8 parts of vinyl trimethoxy silane,
12-15 parts of glass powder,
5 to 10 parts of boron nitride,
5-15 parts of magnesium oxide,
8-15 parts of gas-phase method silicon dioxide,
1-5 parts of isopropyl titanate,
0.5 to 2 parts of dicumyl peroxide,
1 to 5 parts of methyl phenyl diethoxy silane,
0.4-0.8 part of 1, 3-dimethyl-6-semicarbazide pyrimidine,
0.5 to 1 part of manganese dioxide,
3-15 parts of 1, 6-di (diphenylphosphino) hexane,
1-2 parts of an antioxidant.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the scheme, the average molecular weight of the methyl vinyl silicone rubber is 60-80 ten thousand.
2. In the scheme, the specific surface area of the fumed silica is 200-400 m2/g。
3. In the scheme, the particle size of the aluminum hydroxide is 5000-8000 meshes.
4. In the scheme, the weight ratio of the boron nitride to the magnesium oxide is 1: 1-1.5.
5. In the scheme, the vinyl mole percentage of the methyl vinyl silicone rubber is 0.05-0.25%.
6. In the scheme, the antioxidant is at least one selected from the group consisting of antioxidant 1010, antioxidant 300, antioxidant 168, antioxidant 2264, antioxidant 264, antioxidant DLTP and antioxidant ODP.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the fire-resistant communication cable, isopropyl titanate, methyl phenyl diethoxysilane and 1, 3-dimethyl-6-semicarbazide pyrimidine are added into a ceramic silicon rubber sheath layer system, so that the mechanical property and the structural stability of a ceramic silicon rubber composite insulating cable material containing methyl vinyl silicon rubber, glass powder and magnesium oxide are improved, the tensile resistance and the impact resistance are improved, the final ceramic shell layer is prevented from cracking or the density is reduced, and the reliability and the service life of a cable taking the silicon rubber as the composite insulating material in practical application are effectively improved.
2. According to the fire-resistant communication cable, 3-15 parts of 1, 6-di (diphenylphosphino) hexane and manganese dioxide are further added into a ceramic silicon rubber sheath layer system, so that glass powder is easier to melt at a low temperature, eutectic reaction among magnesium oxide, gas-phase-method silicon dioxide, boron nitride and the like is promoted, the bonding effect is enhanced, a more uniform and compact ceramic shell is formed, oxygen can be prevented from permeating into the interior, the insulating property and the fire resistance of the ceramic silicon rubber sheath layer are further improved, and the insulating property and the fire resistance of the cable are enhanced.
Drawings
FIG. 1 is a schematic structural diagram of an overhead copper-magnesium alloy user cable according to the present invention.
In the above drawings: 1. a copper-magnesium alloy conductor; 2. a polyethylene layer; 3. a wire; 41. a first twisted wire pair; 42. a second twisted wire pair; 5. aluminum foil; 6. a polyvinyl chloride layer; 7. a ceramic silicon rubber sheath layer.
Detailed Description
The invention is further described below with reference to the following examples:
examples 1 to 4: a fire-resistant communication cable comprises 4 copper-magnesium alloy conductors 1, wherein a polyethylene layer 2 is coated on the outer surface of each copper-magnesium alloy conductor 1 to form a lead 3, the 4 leads 3 are twisted pairwise to form a first twisted pair 41 and a second twisted pair 42, an aluminum foil 5 is wrapped on the outer surface of each twisted pair 4, a polyvinyl chloride layer 6 is coated on the outer surface of the aluminum foil 5, and a ceramic silicon rubber sheath layer 7 is coated on the outer surface of the polyvinyl chloride layer 6;
the ceramic silicon rubber sheath layer 7 is composed of the following components in parts by weight:
TABLE 1
The average molecular weight of the methyl vinyl silicone rubber is 60-80 ten thousand.
The specific surface area of the fumed silica is 200-400 m2/g。
The particle size of the aluminum hydroxide is 5000-8000 meshes.
The weight ratio of the boron nitride to the magnesium oxide is 1: 1-1.5.
The vinyl mole percentage content of the methyl vinyl silicone rubber is 0.05-0.25%.
The antioxidant is at least one selected from antioxidant 1010, antioxidant 300, antioxidant 168, antioxidant 2264, antioxidant 264, antioxidant DLTP and antioxidant ODP.
Comparative examples 1 to 2: a fire-resistant communication cable is characterized in that a ceramic silicon rubber sheath layer 7 of the fire-resistant communication cable is composed of the following components in parts by weight, and is shown in Table 2:
TABLE 2
The indexes of detection of the present example and the comparative example are shown in Table 3:
TABLE 3
As can be seen from Table 3, the fire-resistant communication cable provided by the invention has the advantages of tensile resistance, low permanent deformation rate and good flame retardant property.
The isopropyl titanate, the methyl phenyl diethoxy silane and the 1, 3-dimethyl-6-semicarbazide pyrimidine are added into a ceramic silicone rubber sheath layer system, so that the mechanical property and the structural stability of a ceramic silicone rubber composite insulating cable material containing methyl vinyl silicone rubber, glass powder and magnesium oxide are improved, the tensile resistance and the impact resistance are improved, the cracking or density reduction of a final ceramic shell layer is avoided, and the reliability and the service life of a cable taking the silicone rubber as the composite insulating material in practical application are effectively improved;
and secondly, 3-15 parts of 1, 6-di (diphenylphosphino) hexane and manganese dioxide are further added into the ceramic silicon rubber sheath layer system, so that glass powder is easier to melt at a low temperature, eutectic reaction among magnesium oxide, gas-phase-method silicon dioxide, boron nitride and the like is promoted, the bonding effect is enhanced, a more uniform and compact ceramic shell is formed, oxygen can be prevented from permeating into the ceramic shell, the insulativity and the flame retardance of the ceramic silicon rubber sheath layer are further improved, and the insulativity and the flame retardance of the cable are enhanced.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A fire-resistant communications cable, characterized by: the copper-magnesium alloy twisted pair comprises 4 copper-magnesium alloy conductors (1), wherein a polyethylene layer (2) is coated on the outer surface of each copper-magnesium alloy conductor (1) to form a lead (3), the 4 leads (3) are twisted pairwise to form a first twisted pair (41) and a second twisted pair (42), an aluminum foil (5) is wrapped on the outer surface of each twisted pair (4), a polyvinyl chloride layer (6) is coated on the outer surface of the aluminum foil (5), and a ceramic silicon rubber sheath layer (7) is coated on the outer surface of the polyvinyl chloride layer (6);
the ceramic silicon rubber sheath layer (7) is composed of the following components in parts by weight:
70-90 parts of methyl vinyl silicone rubber,
10-20 parts of ethylene methacrylic acid copolymer,
4-8 parts of vinyl trimethoxy silane,
12-15 parts of glass powder,
5 to 10 parts of boron nitride,
5-15 parts of magnesium oxide,
8-15 parts of gas-phase method silicon dioxide,
1-5 parts of isopropyl titanate,
0.5 to 2 parts of dicumyl peroxide,
1 to 5 parts of methyl phenyl diethoxy silane,
0.4-0.8 part of 1, 3-dimethyl-6-semicarbazide pyrimidine,
0.5 to 1 part of manganese dioxide,
3-15 parts of 1, 6-di (diphenylphosphino) hexane,
1-2 parts of an antioxidant.
2. The flame-resistant communications cable of claim 1, wherein: the average molecular weight of the methyl vinyl silicone rubber is 60-80 ten thousand.
3. The flame-resistant communications cable of claim 1, wherein: the specific surface area of the fumed silica is 200-400 m2/g。
4. The flame-resistant communications cable of claim 1, wherein: the particle size of the aluminum hydroxide is 5000-8000 meshes.
5. The flame-resistant communications cable of claim 1, wherein: the weight ratio of boron nitride to magnesium oxide is 1:1 to 1.5.
6. The flame-resistant communications cable of claim 1, wherein: the vinyl mole percentage content of the methyl vinyl silicone rubber is 0.05-0.25%.
7. The flame-resistant communications cable of claim 1, wherein: the antioxidant is at least one selected from the group consisting of antioxidant 1010, antioxidant 300, antioxidant 168, antioxidant 2264, antioxidant 264, antioxidant DLTP and antioxidant ODP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833548.2A CN110760190A (en) | 2018-07-26 | 2018-07-26 | Fire-resistant communication cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833548.2A CN110760190A (en) | 2018-07-26 | 2018-07-26 | Fire-resistant communication cable |
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| CN110760190A true CN110760190A (en) | 2020-02-07 |
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| CN201810833548.2A Pending CN110760190A (en) | 2018-07-26 | 2018-07-26 | Fire-resistant communication cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106563A (en) * | 2021-10-29 | 2022-03-01 | 浙江元通线缆制造有限公司 | Pressure-resistant and high-temperature-resistant cable and preparation method thereof |
| CN114709022A (en) * | 2022-04-18 | 2022-07-05 | 山东大学 | Flame-retardant ceramizable silicone rubber sheath cable and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850805A (en) * | 2012-09-24 | 2013-01-02 | 无锡江南电缆有限公司 | Fire-resistant ceramic silicone rubber, preparation method of fire-resistant ceramic silicone rubber and application in wires and cables |
| CN103122095A (en) * | 2012-12-28 | 2013-05-29 | 深圳市沃尔核材股份有限公司 | Ceramized silicone rubber heat shrinkable bushing and production method thereof |
| CN105139959A (en) * | 2015-07-13 | 2015-12-09 | 江苏亨通线缆科技有限公司 | Low-attenuation overhead four-core user lead-in cable |
| US9499677B2 (en) * | 2013-03-15 | 2016-11-22 | Melior Innovations, Inc. | Black ceramic additives, pigments, and formulations |
| CN106188705A (en) * | 2016-08-11 | 2016-12-07 | 芜湖诚通自动化设备有限公司 | A kind of high insulating ceramics fireproof power cable material |
-
2018
- 2018-07-26 CN CN201810833548.2A patent/CN110760190A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850805A (en) * | 2012-09-24 | 2013-01-02 | 无锡江南电缆有限公司 | Fire-resistant ceramic silicone rubber, preparation method of fire-resistant ceramic silicone rubber and application in wires and cables |
| CN103122095A (en) * | 2012-12-28 | 2013-05-29 | 深圳市沃尔核材股份有限公司 | Ceramized silicone rubber heat shrinkable bushing and production method thereof |
| US9499677B2 (en) * | 2013-03-15 | 2016-11-22 | Melior Innovations, Inc. | Black ceramic additives, pigments, and formulations |
| CN105139959A (en) * | 2015-07-13 | 2015-12-09 | 江苏亨通线缆科技有限公司 | Low-attenuation overhead four-core user lead-in cable |
| CN106188705A (en) * | 2016-08-11 | 2016-12-07 | 芜湖诚通自动化设备有限公司 | A kind of high insulating ceramics fireproof power cable material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106563A (en) * | 2021-10-29 | 2022-03-01 | 浙江元通线缆制造有限公司 | Pressure-resistant and high-temperature-resistant cable and preparation method thereof |
| CN114709022A (en) * | 2022-04-18 | 2022-07-05 | 山东大学 | Flame-retardant ceramizable silicone rubber sheath cable and preparation method thereof |
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Application publication date: 20200207 |
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