CN110922668A - Low-smoke halogen-free flame-retardant cable material and preparation method thereof - Google Patents
Low-smoke halogen-free flame-retardant cable material and preparation method thereof Download PDFInfo
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- CN110922668A CN110922668A CN201911039615.4A CN201911039615A CN110922668A CN 110922668 A CN110922668 A CN 110922668A CN 201911039615 A CN201911039615 A CN 201911039615A CN 110922668 A CN110922668 A CN 110922668A
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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
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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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
- C08K2003/2224—Magnesium hydroxide
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a low-smoke halogen-free flame-retardant cable material and a preparation method thereof. The low-smoke halogen-free flame-retardant cable material comprises the following components in parts by weight: 35-40 parts of polymer, 60-80 parts of flame retardant, 0.5-1.5 parts of coupling agent, 0.2-0.8 part of antioxidant and 0.2-1.0 part of auxiliary crosslinking agent. The polymer comprises ethylene-vinyl acetate copolymer, ethylene-octylene copolymer and maleic anhydride grafted polyethylene, the flame retardant comprises one or more of aluminum hydroxide, magnesium hydroxide, calcium carbonate and 3.5-hydrozinc borate, the coupling agent is a silicon-based coupling agent, the antioxidant comprises bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and/or 4, 4' -thiobis (6-tert-butyl-3-methylphenol), and the auxiliary crosslinking agent is trimethylolpropane trimethacrylate. The cable material prepared by the scheme of the invention has the advantages of low total heat release amount during combustion, lower temperature, low smoke generation amount, excellent mechanical property and the like.
Description
Technical Field
The invention relates to the field of flame-retardant cables, in particular to a low-smoke halogen-free flame-retardant cable material and a preparation method thereof.
Background
At present, the cable material for building and installation in China is mainly a PVC (polyvinyl chloride) composite material. After a fire disaster occurs to a building, the PVC composite material generates toxic and harmful halogenated hydrocarbon gas in the combustion process, so that people are suffocated and die. And the smoke quantity of the low-smoke halogen-free polyolefin material after combustion is low, and a large amount of smoke can not be generated to influence a respiratory system. The small, light in weight's cloth electric wire is convenient for workman's transportation in the installation, lays, poling etc. operation. Therefore, a thin-wall low-smoke halogen-free polyolefin flame-retardant cable integrating the two advantages is a demand for market development.
Disclosure of Invention
In order to overcome the defects in the prior art, embodiments of the present invention provide a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, which are used to solve at least one of the above problems.
The embodiment of the application discloses: the utility model provides a low smoke and zero halogen flame retardant cable material for making thin-walled low smoke and zero halogen flame retardant cable, according to the part by mass, cable material's component includes: 35-40 parts of polymer, 60-80 parts of flame retardant, 0.5-1.5 parts of coupling agent, 0.2-0.8 part of antioxidant and 0.2-1.0 part of auxiliary crosslinking agent.
Specifically, the polymer comprises ethylene-vinyl acetate copolymer, ethylene-octylene copolymer and maleic anhydride grafted polyethylene.
Specifically, the flame retardant comprises one or more of aluminum hydroxide, magnesium hydroxide, calcium carbonate and 3.5-hydrozinc borate.
Specifically, the cable material comprises, by mass, 25 parts of aluminum hydroxide, 30 parts of magnesium hydroxide, 10 parts of calcium carbonate and 5 parts of 3.5 parts of zinc borate hydrate.
Specifically, the average particle size of the aluminum hydroxide and the magnesium hydroxide is less than 1.5 μm, and the average particle size of the calcium carbonate is less than 2 μm.
Specifically, the coupling agent is a silicon coupling agent.
Specifically, the antioxidant comprises bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and/or 4, 4' -thiobis (6-tert-butyl-3-methylphenol).
Specifically, the auxiliary crosslinking agent is trimethylolpropane trimethacrylate.
The embodiment of the application also discloses: a method for preparing the low-smoke halogen-free flame-retardant cable material comprises the following steps:
according to the mass parts, 35-40 parts of polymer, 60-80 parts of flame retardant, 0.5-1.5 parts of coupling agent, 0.2-0.8 part of antioxidant and 0.2-1.0 part of auxiliary crosslinking agent are added;
mixing the backup raw materials;
extruding the mixed raw materials by an extruder to complete granulation;
and screening the granulated materials to obtain the target cable material.
Specifically, the step of mixing the backed-up raw materials comprises the following steps: and adding the backup raw materials into an internal mixer, and mixing the raw materials at the rotating speed of 40-50 r/min for 20-25 min within the temperature range of 165 +/-2 ℃.
The invention has the following beneficial effects:
1. the flame retardant with the composite formula is added into the polymer, and each flame retardant can generate a large amount of crystal water in different combustion stages, so that the average heat release rate during combustion is reduced; in addition, gases such as carbon dioxide are generated during the combustion process, so that the oxygen content in the air can be diluted, and the total amount of heat release during the combustion can be reduced.
2. When the prepared cable material is combusted, the carbon layer is porous and hard, the polymer can be prevented from being combusted continuously, the generated smoke particles are adsorbed in the pore channels, and the smoke generation amount of the material is reduced.
3. The flame retardant is subjected to modification treatment, so that the specific surface area of the flame retardant is increased, the surface of the flame retardant becomes relatively round, the polymer and the flame retardant can be uniformly stretched under the stress state of the material, stress concentration points are not generated, and the material is ensured to have good mechanical properties.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a preparation method of a low-smoke halogen-free flame-retardant cable material according to an embodiment of the invention.
Reference numerals of the above figures: 1. an internal mixer; 2. a hoist; 3. a feeder; 4. an extruder; 5. a screening device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A low-smoke halogen-free flame-retardant cable material comprises the following components in parts by weight:
example 2
A low-smoke halogen-free flame-retardant cable material comprises the following components in parts by weight:
example 3
A low-smoke halogen-free flame-retardant cable material comprises the following components in parts by weight:
in the three examples, the average particle size of the aluminum hydroxide and the magnesium hydroxide is less than 1.5 μm, and the average particle size of the calcium carbonate is less than 2 μm. Thus, the particle size of the flame retardant is small, the specific surface area is increased, and the flame retardant effect can be improved. Furthermore, the surface of the flame retardant is modified, so that the surface of the flame retardant becomes relatively round, the polymer and the flame retardant can be uniformly stretched under the stress state of the material, stress concentration points are not generated, and the material is ensured to have good mechanical properties.
The preparation method of the low-smoke halogen-free flame-retardant cable material of the embodiment 1 to 3 comprises the following steps:
firstly, according to the components in the embodiment 1-3, the polymer, the flame retardant, the coupling agent, the antioxidant and the auxiliary crosslinking agent are weighed according to the mixture ratio and then added into the internal mixer 1, and the raw materials are mixed for 20-25 min at the rotating speed of 40-50 r/min within the temperature range of 165 +/-2 ℃.
Subsequently, the mixed raw materials are conveyed to the feeder 3 by the elevator 2.
Subsequently, the raw material was fed into the extruder 4 through the feeder 3, and the material was extruded at an extrusion rate of 20 ± 5 to complete granulation.
Subsequently, the granulated material is air-fed into the screening apparatus 5 to be screened. The screening criteria were: and filtering impurities through a 150-mesh filter screen, wherein the pressure of the filter screen is less than 15MPa, and the filter screen is not broken within 1h30min, so that the cable material is obtained.
The cable material prepared by the method and the raw materials with three proportions has the following properties in the initial device state (without any weather resistance experiment) and after heat aging (heating at 120 +/-2 ℃ for 240 hours) experiments as shown in the following table 1:
table 1: properties of cable material
The above experiments show that the cable material prepared in example 3 has the best overall properties. That is, when aluminum hydroxide, magnesium hydroxide, calcium carbonate and 3.5 hydrous zinc borate are added to the polymer at the same time, the overall performance of the cable material is optimal. Because each flame retardant can generate a large amount of crystal water in different combustion stages, the average heat release rate during combustion is reduced; moreover, since gas such as carbon dioxide is generated during combustion to dilute the oxygen content in the air and reduce the total amount of heat released during combustion, the CPR combustion performance is optimized.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a low smoke and zero halogen flame retardant cable material for making thin wall low smoke and zero halogen flame retardant cable, its characterized in that, according to the mass fraction, cable material's component includes: 35-40 parts of polymer, 60-80 parts of flame retardant, 0.5-1.5 parts of coupling agent, 0.2-0.8 part of antioxidant and 0.2-1.0 part of auxiliary crosslinking agent.
2. The low smoke zero halogen flame retardant cable material in accordance with claim 1, wherein the polymer comprises ethylene-vinyl acetate copolymer, ethylene-propylene copolymer and maleic anhydride grafted polyethylene.
3. The low smoke, zero halogen, flame retardant cable material of claim 1, wherein the flame retardant comprises one or more of aluminum hydroxide, magnesium hydroxide, calcium carbonate, and zinc 3.5 hydroborate.
4. The low-smoke zero-halogen flame-retardant cable material as claimed in claim 3, characterized in that the cable material comprises, by mass, 25 parts of aluminum hydroxide, 30 parts of magnesium hydroxide, 10 parts of calcium carbonate and 5 parts of 3.5 parts of zinc borate hydrate.
5. The low smoke zero halogen flame retardant cable material in accordance with claim 3, wherein the average particle size of the aluminum hydroxide and the magnesium hydroxide is less than 1.5 μm, and the average particle size of the calcium carbonate is less than 2 μm.
6. The low smoke zero halogen flame retardant cable material of claim 1, wherein the coupling agent is a silicon-based coupling agent.
7. The low smoke zero halogen flame retardant cable material in accordance with claim 1, wherein the antioxidant comprises bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and/or 4, 4' -thiobis (6-tert-butyl-3-methylphenol).
8. The low-smoke zero-halogen flame-retardant cable material as claimed in claim 1, wherein the auxiliary crosslinking agent is trimethylolpropane trimethacrylate.
9. A method for preparing a low smoke zero halogen flame retardant cable material according to any of claims 1 to 8, characterized in that it comprises the following steps:
according to the mass parts, 35-40 parts of polymer, 60-80 parts of flame retardant, 0.5-1.5 parts of coupling agent, 0.2-0.8 part of antioxidant and 0.2-1.0 part of auxiliary crosslinking agent are added;
mixing the backup raw materials;
extruding the mixed raw materials by an extruder to complete granulation;
and screening the granulated materials to obtain the target cable material.
10. The method of claim 9, wherein the step of "mixing the backup raw materials" comprises: and adding the backup raw materials into an internal mixer, and mixing the raw materials at the rotating speed of 40-50 r/min for 20-25 min within the temperature range of 165 +/-2 ℃.
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| CN201911039615.4A CN110922668A (en) | 2019-10-29 | 2019-10-29 | Low-smoke halogen-free flame-retardant cable material and preparation method thereof |
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| CN201911039615.4A CN110922668A (en) | 2019-10-29 | 2019-10-29 | Low-smoke halogen-free flame-retardant cable material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708191A (en) * | 2021-01-11 | 2021-04-27 | 溧阳华溯新材料有限公司 | Production method of low-smoke halogen-free flame-retardant polymer material composite belt |
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| CN112708191A (en) * | 2021-01-11 | 2021-04-27 | 溧阳华溯新材料有限公司 | Production method of low-smoke halogen-free flame-retardant polymer material composite belt |
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