CN103772791A - Halogen-free cable sheath material and preparation method thereof - Google Patents
Halogen-free cable sheath material and preparation method thereof Download PDFInfo
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- CN103772791A CN103772791A CN201410027375.7A CN201410027375A CN103772791A CN 103772791 A CN103772791 A CN 103772791A CN 201410027375 A CN201410027375 A CN 201410027375A CN 103772791 A CN103772791 A CN 103772791A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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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
- 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
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses a halogen-free cable sheath material comprising the following components in parts by weight: 35-45 parts of ethylene-vinyl acetate copolymers, 50-65 parts of linear low-density polyethylene, 50-60 parts of aluminum hydroxide, 50-60 parts of magnesium hydroxide, 28-35 parts of ammonium polyphosphate, 3-7 parts of charring agent PER (Pentaerythritol Ester Rosin), 8-12 parts of nylon PA-66, 5-8 parts of microcrystalline wax, 15-25 parts of white carbon black, 7-10 parts of China clay, 1-2 parts of anti-aging agent RD, 1-1.5 parts of sulphur. The invention also discloses a preparation method of the halogen-free cable sheath material. According to the invention, the halogen-free cable sheath material is excellent in fire resistance, free of halogen, little in combustion smoke and environment pollution, simple in preparation process and convenient for actual operation.
Description
Technical field
The present invention relates to cable sheath material technical field, relate in particular to a kind of halogen-free cable sheath material and preparation method thereof.
Background technology
In recent decades, elastomeric material and goods thereof obtain flourish, and it replaces just rapidly the natural polymers such as steel, metal, cement and timber, cotton to be widely used in each department of the national economy such as industry, agricultural, military affairs.As the rubber of cable outer layer sheath material, its most synthetic materials belongs to inflammable, combustible matl, fire retardant material often contains very high halogen, in combustion processes, can produce a large amount of toxic gases, cause the harm to environment, people's life security is formed to grave danger, therefore, the toxicant producing when how improving the flame retardant properties of synthetic materials and reducing its burning, has become a urgent problem.
Summary of the invention
The present invention proposes a kind of halogen-free cable sheath material and preparation method thereof, described halogen-free cable sheath material fire performance excellence, and not halogen-containing, combustion fumes is little, and environmental pollution is little, and preparation process is simple, is convenient to actually operating.
A kind of halogen-free cable sheath material that the present invention proposes, comprises following component: ethylene-vinyl acetate copolymer 35-45 part, linear low density polyethylene 50-65 part by weight, aluminium hydroxide 50-60 part, magnesium hydroxide 50-60 part, ammonium polyphosphate 28-35 part, char-forming agent PER3-7 part, nylon PA-668-12 part, microcrystalline wax 5-8 part, white carbon black 15-25 part, potter's clay 7-10 part, anti-aging agent RD 1-2 part, sulphur 1-1.5 part.
In embodiment, the weight part of ethylene-vinyl acetate copolymer can be 36, 37.7, 38, 40, 40.6, 41, 42.7, 43, 44, the weight part of linear low density polyethylene can be 51.7, 52, 53, 55, 55.3, 56, 58, 61, 64, 64.4, the weight part of aluminium hydroxide can be 51.2, 52, 53, 54, 55, 57.3, 58, 59, 59.2, the weight part of magnesium hydroxide can be 50.5, 51, 52.4, 53, 54, 56, 58, 59, 59.4, the weight part of ammonium polyphosphate can be 28.3, 29.7, 30, 31, 32, 32.5, 34, 34.4, the weight part of char-forming agent PER can be 3.7, 4, 4.7, 5, 5.2, 6.8, the weight part of nylon PA-66 can be 8.6, 9, 9.5, 10, 10.4, 11, 11.7, the weight part of microcrystalline wax can be 5.2, 5.7, 6, 6.2, 6.8, 7, 7.3, 7.7, the weight part of white carbon black can be 15.5, 16.3, 17, 18, 20, 21, 23, 24, 24.4, the weight part of potter's clay can be 7.1, 7.5, 8, 8.3, 9, 9.4, 9.7, the weight part of anti-aging agent RD can be 1.1, 1.3, 1.4, 1.5, 1.7, 1.9, the weight part of sulphur can be 1.1, 1.2, 1.3, 1.4.
Preferably, the density of linear low density polyethylene is 0.923-0.931g/cm
3.
Preferably, magnesium hydroxide and the silane coupling agent processing of surface of aluminum hydroxide footpath, the weight ratio of aluminium hydroxide and magnesium hydroxide is 1:1.
Preferably, the weight ratio of ammonium polyphosphate, char-forming agent and nylon is (6-7): 1:2.
Preferably, the weight ratio of ethylene-vinyl acetate copolymer and linear low density polyethylene is (8-9): (12-13).
Preferably, comprise by weight following component: 40 parts of ethylene-vinyl acetate copolymers, 60 parts of linear low density polyethylenes, 60 parts, aluminium hydroxide, 60 parts of magnesium hydroxides, 30 parts of 10 parts of ammonium polyphosphates of fire retarding synergist, char-forming agent PER5 part, nylon PA-6610 part, microcrystalline wax 5-8 part, white carbon black 15-25 part, anti-aging agent RD 1-2 part sulphur 1-1.5 part.
The invention also discloses a kind ofly according to the preparation method of above-mentioned halogen-free cable sheath material, comprise the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 80-90 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 110-120 ℃, thin-pass 4-6 time;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
In the present invention, mix and use the flame retardant properties that can obviously improve above-mentioned sheath material by interpolation linear low density polyethylene the-rare multipolymer of acetic acid second rare with second, use aluminium hydroxide and magnesium hydroxide flame retardant system and control both at the content of component in certain scope, and rationally add ammonium polyphosphate, nylon PA-66 and char-forming agent PER Intumescent Retardant System, can form synergistic flame retardant effect with the flame-retardant system of magnesium hydroxide and aluminium hydroxide, significantly improve the flame retardant properties of material, and second is rare-and the rare multipolymer of acetic acid second can improve flame-retardant system and poly consistency, greatly strengthen the flame retardant properties of material, add white carbon black and potter's clay as reinforcing filler, sheath material smooth surface, viscosity is high and shrinking percentage is little, in the present invention, above-mentioned halogen-free cable sheath material fire performance excellence, and not halogen-containing, combustion fumes is little, environmental pollution is little, and preparation process is simple, is convenient to actually operating.
Embodiment
A kind of halogen-free cable sheath material that the present invention proposes, comprises following component: ethylene-vinyl acetate copolymer 35-45 part, linear low density polyethylene 50-65 part by weight, aluminium hydroxide 50-60 part, magnesium hydroxide 50-60 part, ammonium polyphosphate 28-35 part, char-forming agent PER3-7 part, nylon PA-668-12 part, microcrystalline wax 5-8 part, white carbon black 15-25 part, potter's clay 7-10 part, anti-aging agent RD 1-2 part, sulphur 1-1.5 part.
The preparation method of above-mentioned halogen-free cable sheath material, comprises the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 80-90 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 110-120 ℃, thin-pass 4-6 time;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
Embodiment 1
A kind of halogen-free cable sheath material, comprises following component: 36 parts of ethylene-vinyl acetate copolymers, 64 parts of linear low density polyethylenes by weight, 52 parts, aluminium hydroxide, 59 parts of magnesium hydroxides, 29.7 parts of ammonium polyphosphates, char-forming agent PER6.8 part, nylon PA-669.5 part, 7.7 parts of microcrystalline waxes, 16.3 parts of white carbon blacks, 9.7 parts, potter's clay, 1.3 parts of anti-aging agent RDs, 1.4 parts, sulphur.
The preparation method of above-mentioned halogen-free cable sheath material, comprises the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 80 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 110 ℃, thin-pass 5 times;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
Embodiment 2
A kind of halogen-free cable sheath material, comprises following component: 38 parts of ethylene-vinyl acetate copolymers, 56 parts of linear low density polyethylenes by weight, 57.3 parts, aluminium hydroxide, 56 parts of magnesium hydroxides, 32 parts of ammonium polyphosphates, char-forming agent PER5.2 part, nylon PA-6610.4 part, 6.8 parts of microcrystalline waxes, 20 parts of white carbon blacks, 8.3 parts, potter's clay, 1.5 parts of anti-aging agent RDs, 1.3 parts, sulphur.
In the present embodiment, the preparation method of above-mentioned halogen-free cable sheath material, comprises the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 85 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 115 ℃, thin-pass 4 times;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
Embodiment 3
A kind of halogen-free cable sheath material that the present invention proposes, comprises following component: 43 parts of ethylene-vinyl acetate copolymers, 52 parts of linear low density polyethylenes by weight, 59 parts, aluminium hydroxide, 51 parts of magnesium hydroxides, 34.4 parts of ammonium polyphosphates, char-forming agent PER3.7 part, nylon PA-6611.7 part, 5.7 parts of microcrystalline waxes, 24.4 parts of white carbon blacks, 7.5 parts, potter's clay, 1.9 parts of anti-aging agent RDs, 1.1 parts, sulphur.
In the present embodiment, the preparation method of above-mentioned halogen-free cable sheath material, comprises the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 90 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 120 ℃, thin-pass 6 times;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
Above-mentioned halogen-free cable sheath material, mix and use the flame retardant properties that can obviously improve above-mentioned sheath material by interpolation linear low density polyethylene the-rare multipolymer of acetic acid second rare with second, use aluminium hydroxide and magnesium hydroxide flame retardant system and control both at the content of component in certain scope, and rationally add ammonium polyphosphate, nylon PA-66 and char-forming agent PER Intumescent Retardant System, can form synergistic flame retardant effect with the flame-retardant system of magnesium hydroxide and aluminium hydroxide, significantly improve the flame retardant properties of material, and second is rare-and the rare multipolymer of acetic acid second can improve flame-retardant system and poly consistency, greatly strengthen the flame retardant properties of material, add white carbon black and potter's clay as reinforcing filler, sheath material smooth surface, viscosity is high and shrinking percentage is little, in the present invention, above-mentioned halogen-free cable sheath material fire performance excellence, and not halogen-containing, combustion fumes is little, environmental pollution is little, and preparation process is simple, is convenient to actually operating.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (7)
1. a halogen-free cable sheath material, is characterized in that, comprises by weight following component: ethylene-vinyl acetate copolymer 35-45 part, linear low density polyethylene 50-65 part, aluminium hydroxide 50-60 part, magnesium hydroxide 50-60 part, ammonium polyphosphate 28-35 part, char-forming agent PER3-7 part, nylon PA-668-12 part, microcrystalline wax 5-8 part, white carbon black 15-25 part, potter's clay 7-10 part, anti-aging agent RD 1-2 part, sulphur 1-1.5 part.
2. halogen-free cable sheath material according to claim 1, is characterized in that, the density of linear low density polyethylene is 0.923-0.931g/cm
3.
3. halogen-free cable sheath material according to claim 1, is characterized in that, magnesium hydroxide and the silane coupling agent processing of surface of aluminum hydroxide footpath, and the weight ratio of aluminium hydroxide and magnesium hydroxide is 1:1.
4. halogen-free cable sheath material according to claim 1, is characterized in that, the weight ratio of ammonium polyphosphate, char-forming agent and nylon is (6-7): 1:2.
5. halogen-free cable sheath material according to claim 1, is characterized in that, the weight ratio of ethylene-vinyl acetate copolymer and linear low density polyethylene is (8-9): (12-13).
6. according to the halogen-free cable sheath material described in claim 1-5 any one, it is characterized in that, comprise by weight following component: 40 parts of ethylene-vinyl acetate copolymers, 60 parts of linear low density polyethylenes, 60 parts, aluminium hydroxide, 60 parts of magnesium hydroxides, 30 parts of 10 parts of ammonium polyphosphates of fire retarding synergist, char-forming agent PER5 part, nylon PA-6610 part, microcrystalline wax 5-8 part, white carbon black 15-25 part, anti-aging agent RD 1-2 part sulphur 1-1.5 part.
7. according to a preparation method for the halogen-free cable sheath material described in any one in claim 1-6, it is characterized in that, comprise the steps:
S1, take ethylene-vinyl acetate copolymer, linear low density polyethylene, aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66, microcrystalline wax, white carbon black, anti-aging agent RD and sulphur by proportioning;
S2, ethylene-vinyl acetate copolymer described in S1, linear low density polyethylene, microcrystalline wax, anti-aging agent RD and sulphur is mixing evenly at mixing roll, then being 80-90 ℃ in temperature adds white carbon black to carry out banburying, then add respectively aluminium hydroxide, magnesium hydroxide, fire retarding synergist, ammonium polyphosphate, char-forming agent PER, nylon PA-66 mixing, melting temperature is 110-120 ℃, thin-pass 4-6 time;
S3, S2 is obtained to material forming, sulfuration obtains halogen-free cable sheath material.
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| CN201410027375.7A CN103772791A (en) | 2014-01-21 | 2014-01-21 | Halogen-free cable sheath material and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971851A (en) * | 2014-05-26 | 2014-08-06 | 龚永祥 | Photoelectric composite cable |
| CN104292601A (en) * | 2014-09-25 | 2015-01-21 | 江苏金聚合金材料有限公司 | Oil-proof low-smoke and non-halogen fire-retardant cable material and preparation method thereof |
| CN105001628A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | Halogen-free flame retardant sheath material for optical fibers |
| CN105017759A (en) * | 2015-08-06 | 2015-11-04 | 安徽电信器材贸易工业有限责任公司 | Long-service-life optical fiber sheathing material |
| CN107266778A (en) * | 2017-07-26 | 2017-10-20 | 合肥尚强电气科技有限公司 | A kind of electrical engineering cable sheath material and preparation method thereof |
| CN108440814A (en) * | 2018-01-30 | 2018-08-24 | 昆明天磊线缆材料有限公司 | A kind of 125 DEG C of low smoke and zero halogen cross-linking type polyolefin cable material production methods |
| CN111647223A (en) * | 2020-06-30 | 2020-09-11 | 安徽电气集团股份有限公司 | Wire and cable sheath material for high-speed railway and preparation method thereof |
| CN112391002A (en) * | 2019-08-16 | 2021-02-23 | 南京理工大学 | Heat-shrinkable coating layer for solid propellant and preparation method thereof |
| CN113698667A (en) * | 2021-09-01 | 2021-11-26 | 中广核高新核材科技（苏州）有限公司 | Composite clay mineral high polymer material charring agent and application thereof in halogen-free flame-retardant high polymer material |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971851A (en) * | 2014-05-26 | 2014-08-06 | 龚永祥 | Photoelectric composite cable |
| CN104292601A (en) * | 2014-09-25 | 2015-01-21 | 江苏金聚合金材料有限公司 | Oil-proof low-smoke and non-halogen fire-retardant cable material and preparation method thereof |
| CN104292601B (en) * | 2014-09-25 | 2016-09-21 | 江苏金聚合金材料有限公司 | A kind of oil-resistant low-smoke halogen-free flame-retardant CABLE MATERIALS and preparation method thereof |
| CN105001628A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | Halogen-free flame retardant sheath material for optical fibers |
| CN105017759A (en) * | 2015-08-06 | 2015-11-04 | 安徽电信器材贸易工业有限责任公司 | Long-service-life optical fiber sheathing material |
| CN107266778A (en) * | 2017-07-26 | 2017-10-20 | 合肥尚强电气科技有限公司 | A kind of electrical engineering cable sheath material and preparation method thereof |
| CN108440814A (en) * | 2018-01-30 | 2018-08-24 | 昆明天磊线缆材料有限公司 | A kind of 125 DEG C of low smoke and zero halogen cross-linking type polyolefin cable material production methods |
| CN112391002A (en) * | 2019-08-16 | 2021-02-23 | 南京理工大学 | Heat-shrinkable coating layer for solid propellant and preparation method thereof |
| CN112391002B (en) * | 2019-08-16 | 2022-05-27 | 南京理工大学 | Heat-shrinkable coating layer for solid propellant and preparation method thereof |
| CN111647223A (en) * | 2020-06-30 | 2020-09-11 | 安徽电气集团股份有限公司 | Wire and cable sheath material for high-speed railway and preparation method thereof |
| CN113698667A (en) * | 2021-09-01 | 2021-11-26 | 中广核高新核材科技（苏州）有限公司 | Composite clay mineral high polymer material charring agent and application thereof in halogen-free flame-retardant high polymer material |
| CN113698667B (en) * | 2021-09-01 | 2024-03-01 | 中广核高新核材科技（苏州）有限公司 | Composite clay mineral high polymer material carbonizing agent and application thereof in halogen-free flame-retardant high polymer material |
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