CN112063035B - Silane natural light crosslinked halogen-free flame-retardant cable material and preparation method thereof - Google Patents
Silane natural light crosslinked halogen-free flame-retardant cable material and preparation method thereof Download PDFInfo
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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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- 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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- 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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- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- 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
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
- C08L2312/08—Crosslinking by silane
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Abstract
The invention discloses a silane natural light crosslinking halogen-free flame-retardant cable material and a preparation method thereof. The cable material comprises a material A and a material B; the material A comprises ethylene-vinyl acetate copolymer, polyethylene, halogen-free flame retardant, initiator, sensitizer, silane coupling agent and material A auxiliary agent, wherein the initiator comprises acyl phosphine oxide and triaryl sulfonium salt, and the material A auxiliary agent comprises at least one of compatilizer, lubricant and antioxidant; the material B comprises polyethylene, a catalyst, a cross-linking agent and a material B auxiliary agent, and the material B auxiliary agent comprises an antioxidant; the mass ratio of the material A to the material B is (95-97): (7-3). According to the invention, the initiator and the sensitizer are added into the formula of the silane crosslinking halogen-free flame retardant material, so that the produced cable material can be quickly crosslinked in a natural environment, a high crosslinking effect is achieved after the cable material is placed for 48 hours, the evaluation of a thermal extension test can be passed, the surface quality of the material is flat and has no dent, the smoke density is low, the performance is good, and the use requirement of the cable can be met.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a silane natural light crosslinking halogen-free flame-retardant cable material and a preparation method thereof.
Background
The crosslinking technology is widely applied to halogen-free flame-retardant polyolefin cable materials. The conventional peroxide crosslinking has obvious disadvantages: the process is complex, the production efficiency is low, and the method is not suitable for high-speed production with smaller wire diameter. The electron beam irradiation crosslinking equipment has large investment and long production period, and the process is only suitable for producing wires with smaller diameters. Silane crosslinking relates to a series of reactions of water, needs to invest extra equipment to influence efficiency, has poor stability, and is not suitable for being used as a low-smoke halogen-free flame-retardant cable.
At present, the conventional natural crosslinking cable material in the market mainly adopts a silane crosslinking technology, but the problems of long crosslinking time, large influence by weather, poor surface quality and the like generally exist, so that the standard requirement of a thermal extension test cannot be met after the cable is placed for 7 days at ordinary times. How to accelerate the crosslinking efficiency and shorten the crosslinking time becomes a problem to be solved urgently for natural crosslinking cable materials.
Disclosure of Invention
In order to overcome the problems of the silane natural light crosslinked cable material, one of the objects of the present invention is to provide a silane natural light crosslinked halogen-free flame retardant cable material, the other object of the present invention is to provide a preparation method of the silane natural light crosslinked halogen-free flame retardant cable material, and the third object of the present invention is to provide an application of the silane natural light crosslinked halogen-free flame retardant cable material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the embodiment of the first aspect of the invention provides a silane natural light crosslinking halogen-free flame-retardant cable material, which comprises a material A and a material B; the material A comprises the following components: ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), halogen-free flame retardant, initiator, sensitizer, silane coupling agent and A material auxiliary agent; the initiator comprises an acylphosphine oxide and a triarylsulfonium salt; the material A auxiliary agent comprises at least one of a compatilizer, a lubricant and an antioxidant; the material B comprises the following components: polyethylene, a catalyst, a cross-linking agent and a material B auxiliary agent; the material B auxiliary agent comprises an antioxidant; wherein the mass ratio of the material A to the material B is (93-97): (7-3).
Preferably, in the silane natural light crosslinking halogen-free flame-retardant cable material, the material A comprises the following components in parts by mass: 20 to 34 portions of ethylene-vinyl acetate copolymer, 6 to 15 portions of polyethylene, 55 to 63 portions of halogen-free flame retardant, 1 to 7 portions of initiator, 0.5 to 3 portions of sensitizer, 0.5 to 1 portion of silane coupling agent and 0.1 to 8 portions of A material auxiliary agent.
Preferably, in the silane natural light crosslinking halogen-free flame-retardant cable material, the component B comprises the following components in parts by mass: 88 to 98 portions of polyethylene, 2 to 4 portions of catalyst, 0.5 to 2 portions of cross-linking agent and 0.1 to 0.5 portion of material B auxiliary agent.
Preferably, in the material A and the material B of the silane natural light crosslinking halogen-free flame retardant cable material, the polyethylene is Metallocene Linear Low Density Polyethylene (MLLDPE). In some embodiments of the invention, the polyethylene is MLLDPE-5220G.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame-retardant cable material, the melt index of the ethylene-vinyl acetate copolymer at 190 ℃ under the test condition of 2.16kg is 2.5g/10 min-4 g/10min. Melt index was measured according to ASTM D1238.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame-retardant cable material, the Vinyl Acetate (VA) content of the ethylene-vinyl acetate copolymer is 18-26 wt%.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame retardant cable material, the ethylene-vinyl acetate copolymer is selected from one or a combination of EVA-7470M and EVA-7350M; more preferably, in the material A, the ethylene-vinyl acetate copolymer is EVA-7470M and EVA-7350M. In some embodiments of the invention, the ethylene-vinyl acetate copolymer is comprised of 20 to 26 parts by mass of EVA-7470M and 4 to 8 parts by mass of EVA-7350M.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame-retardant cable material, the halogen-free flame retardant is at least one selected from aluminum hydroxide, magnesium hydroxide, zinc borate, antimony trioxide, antimony pentoxide, sodium antimonate, barium sulfate, red phosphorus, melamine cyanurate and ammonium polyphosphate; further preferably, the halogen-free flame retardant is at least one selected from aluminum hydroxide, magnesium hydroxide, zinc borate, antimony trioxide, antimony pentoxide, sodium antimonate and barium sulfate; still more preferably, the halogen-free flame retardant is selected from one or a combination of aluminum hydroxide and magnesium hydroxide. In some embodiments of the present invention, the halogen-free flame retardant is aluminum hydroxide.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame-retardant cable material, the initiator consists of 0.5-4 parts by mass of acyl phosphine oxide and 0.5-3 parts by mass of triaryl sulfonium salt; further preferably, the initiator is composed of 1 to 2 parts by mass of acylphosphine oxide and 1 to 2 parts by mass of triarylsulfonium salt.
Preferably, in the material a of the silane natural light crosslinked halogen-free flame retardant cable material, the acylphosphine oxide is at least one selected from 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide (TPO), 2,4, 6-trimethylbenzoyl-ethoxy-phenylphosphine oxide (TEPO), and phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide (photoinitiator 819). In some embodiments of the invention, TPO is selected as the acylphosphine oxide.
The type of the triarylsulfonium salt of the material A of the silane natural light crosslinked halogen-free flame-retardant cable material according to the embodiment of the invention is not particularly limited, and can be selected by those skilled in the art according to actual needs. In some embodiments of the invention, the triarylsulfonium salt is 3-nitrophenyldiphenylsulfonium hexafluorophosphate.
Preferably, in the material A of the silane natural light crosslinking halogen-free flame retardant cable material, a sensitizer is ethyl p-dimethylaminobenzoate (EDB).
Preferably, in the material A of the silane natural light crosslinking halogen-free flame retardant cable material, the silane coupling agent is selected from at least one of vinyltrimethoxysilane (A-171), vinyltriethoxysilane (A-151) and vinyltris (beta-methoxyethoxy) silane (A-172). In some embodiments of the present invention, A-171 is selected as the silane coupling agent.
Preferably, in the additive A of the silane natural light crosslinking halogen-free flame retardant cable material, the compatilizer is selected from one of maleic anhydride grafted polyethylene and maleic anhydride grafted polyethylene wax or a composition thereof. In some embodiments of the invention, the compatibilizer is maleic anhydride grafted polyethylene (maleic anhydride grafted PE).
Preferably, in the additive A of the silane natural light crosslinking halogen-free flame retardant cable material, the lubricant is selected from at least one of fatty acid amide, stearic acid, stearate, paraffin wax, polyethylene wax (PE wax), erucic amide, oleic amide, ethylene bis-stearic amide (EBS), pentaerythritol stearate (PETS); further preferably, the lubricant is at least one selected from paraffin wax, polyethylene wax, ethylene bis stearamide, pentaerythritol stearate. In some embodiments of the invention, the lubricant is selected from polyethylene wax.
Preferably, in the A material auxiliary agent and the B material auxiliary agent of the silane natural light crosslinking halogen-free flame-retardant cable material, the antioxidant is selected from at least one of hindered phenol antioxidant and phosphite ester antioxidant; more preferably, the antioxidant is a hindered phenol antioxidant; still more preferably, the antioxidant is a thiobisphenol antioxidant; more preferably, the antioxidant is at least one selected from the group consisting of 4,4' -thiobis (6-tert-butyl-3-methylphenol) (antioxidant 300), 4' -thiobis (6-tert-butyl-o-cresol) (antioxidant 736), and 2,2' -thiobis (4-methyl-6-tert-butylphenol) (antioxidant 2246S). In some embodiments of the present invention, the antioxidant is antioxidant 300.
Preferably, in the material B of the silane natural light crosslinking halogen-free flame-retardant cable material, the catalyst is an organic tin catalyst. The kind of the organic tin catalyst is not particularly limited, and those skilled in the art can select the organic tin catalyst according to actual needs, for example, at least one of dibutyltin dilaurate, dibutyltin diacetate, dibutyltin laurate maleate and stannous octoate is selected.
Preferably, in the material B of the silane natural light crosslinking halogen-free flame-retardant cable material, the crosslinking agent is organic peroxide; further preferably, the crosslinking agent is at least one selected from dicumyl peroxide (DCP), benzoyl Peroxide (BPO), di-t-butyl peroxide (DTBP), dicumyl hydroperoxide (DBHP), 2, 5-dimethyl-2, 5-di (t-butylperoxy) hexane (DPBMH). In some embodiments of the invention, DCP is selected as the crosslinking agent.
Preferably, the material A of the silane natural light crosslinking halogen-free flame-retardant cable material consists of the following components: ethylene-vinyl acetate copolymer, polyethylene, halogen-free flame retardant, acyl phosphine oxide, triarylsulfonium salt, sensitizer, silane coupling agent, compatilizer, lubricant and antioxidant. In some embodiments of the invention, the material a consists of the following components in parts by mass: 20 to 34 portions of ethylene-vinyl acetate copolymer, 8 to 15 portions of polyethylene, 53 to 63 portions of halogen-free flame retardant, 0.5 to 4 portions of acyl phosphine oxide, 0.5 to 3 portions of triaryl sulfonium salt, 0.5 to 3 portions of sensitizer, 0.5 to 1 portion of silane coupling agent, 3 to 6 portions of compatilizer, 0.3 to 0.8 portion of lubricant and 0.1 to 0.5 portion of antioxidant. In some embodiments of the invention, the material a comprises the following components in parts by mass: 20 to 26 portions of EVA-7470M,4 to 8 portions of EVA-7350M,8 to 15 portions of MLLDPE-5220G,55 to 63 portions of aluminum hydroxide, 0.5 to 4 portions of initiator TPO,0.5 to 3 portions of triarylsulfonium salt initiator, 0.5 to 3 portions of sensitizer EDB,0.5 to 1 portion of silane coupling agent A-171,3 to 6 portions of maleic anhydride grafted polyethylene, 0.3 to 0.8 portion of polyethylene wax and 0.1 to 0.5 portion of antioxidant 300.
Preferably, the material B of the silane natural light crosslinking halogen-free flame-retardant cable material consists of the following components: polyethylene, a catalyst, a cross-linking agent and an antioxidant. In some embodiments of the invention, the material B comprises the following components in parts by mass: 88 to 98 portions of polyethylene, 2 to 4 portions of catalyst, 0.5 to 2 portions of cross-linking agent and 0.1 to 0.5 portion of antioxidant. In some embodiments of the invention, the material a comprises the following components in parts by mass: 88 to 98 portions of MLLDPE-5220G,2 to 4 portions of organic tin catalyst, 0.5 to 2 portions of cross-linking agent DCP and 0.1 to 0.5 portion of antioxidant 300.
Preferably, in the silane natural light crosslinking halogen-free flame-retardant cable material, the mass ratio of the material A to the material B is selected from 93.
The embodiment of the second aspect of the invention provides a preparation method of the silane natural light crosslinking halogen-free flame retardant cable material of the embodiment of the first aspect, which comprises the following steps:
mixing and banburying ethylene-vinyl acetate copolymer, polyethylene, halogen-free flame retardant, initiator, sensitizer, silane coupling agent and A material auxiliary agent to obtain a mixture, and extruding and granulating the mixture to obtain A material;
mixing polyethylene, a catalyst, a cross-linking agent and a material B auxiliary agent, and extruding and granulating the obtained mixture to obtain a material B;
and mixing the material A and the material B to obtain the silane natural light crosslinking halogen-free flame-retardant cable material.
Preferably, the step of preparing the material A further comprises a step of drying the ethylene-vinyl acetate copolymer and the polyethylene before mixing.
Preferably, in the step of preparing the material A, the mixing is carried out in a stirrer; the mixing time is 3 minutes to 10 minutes.
Preferably, in the step of preparing the material A, banburying is carried out at the temperature of 120-150 ℃; further preferably, the banburying temperature is 125-135 ℃.
Preferably, in the step of preparing the material A, banburying is carried out for 15-30 minutes; more preferably, the banburying time is 20 minutes to 25 minutes.
Preferably, in the step of preparing the material B, the extrusion processing temperature is 100-140 ℃. The extrusion may be through a twin-screw extruder or through a single-screw extruder.
Preferably, in the step of preparing the material B, the extrusion processing temperature is 140-180 ℃. The extrusion is carried out in a twin-screw extruder.
The embodiment of the third aspect of the invention provides an application of the silane natural light crosslinking halogen-free flame retardant cable material in the embodiment of the first aspect.
At least one part of the cable is prepared from the silane natural light crosslinking halogen-free flame retardant cable material.
The beneficial effects of the invention are:
according to the invention, the initiator and the sensitizer are added into the formula of the silane crosslinking halogen-free flame retardant material, so that the produced cable material can be quickly crosslinked in a natural environment, a high crosslinking effect is achieved after the cable material is placed for 48 hours, the evaluation of a thermal extension test can be passed, the surface quality of the material is flat and has no dent, the smoke density is low, the performance is good, and the use requirement of the cable can be met.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials, reagents or apparatus used in the examples and comparative examples were obtained from conventional commercial sources or may be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.
The following EVA-7470M and EVA-7350M manufacturers are Tai-plasts, MLLDPE-5220G manufacturers are DuPont Dow, and the triarylsulfonium salt used is 3-nitrophenyl diphenyl sulfide potassium hexafluorophosphate.
Example 1
The silane natural light crosslinking halogen-free flame-retardant cable material comprises a material A and a material B, and the components are shown in Table 1.
Table 1 example 1 composition of cable material
The preparation method of the silane natural light crosslinking halogen-free flame-retardant cable material comprises the following steps:
1. preparation of Material A
1) Pretreatment: and (3) drying the EVA and the polyethylene, and controlling the surface moisture of the resin to be less than 0.3 wt%.
2) Mixing and banburying: according to the composition of the material A in the table 1, EVA, polyethylene, a halogen-free flame retardant, an initiator, a sensitizer, a silane coupling agent, a compatilizer, a lubricant and an antioxidant are placed in a high-speed stirrer, the stirring speed is set to be 350 revolutions per minute, the stirring time is 5 minutes, after full mixing, the material is added into an internal mixer, the mixing temperature is set to be 130 ℃, the internal mixing is carried out for 20-25 minutes, and all the components are uniformly mixed to obtain a mixture.
3) And (3) granulation: plasticating the mixture by a single-screw extruder by using a double-cone feeder at the extrusion temperature of 100-140 ℃, and carrying out hot-cutting granulation, air blast air cooling and vibrating screening separation to obtain the material A.
2. Preparation of Material B
According to the composition of material B in Table 1, polyethylene, a crosslinking agent, an antioxidant and a catalyst are stirred in a stirrer, the mixture is stirred at a low speed for 1 minute at a stirring speed of 100 revolutions per minute, then stirred at a high speed for 3 minutes at a stirring speed of 350 revolutions per minute, and then discharged and poured into a hopper of an extruder, and the temperature of the extruder is as follows: and (2) extruding by a double screw, cooling by a cooling water tank, blowing by a fan, granulating, drying the obtained particles in a drying tower at 80 ℃ for more than 2 hours, and packaging by a vacuum aluminum-plastic bag to obtain a material B, wherein the material B is prepared by the steps of extruding by the double screw, cooling by the cooling water tank, drying by the fan, and carrying out particle cutting.
3. Preparation of silane natural light crosslinked halogen-free flame-retardant cable material
And mixing the material A and the material B according to a mass ratio of 95.
Example 2
The silane natural light crosslinking halogen-free flame-retardant cable material comprises a material A and a material B, and the components are shown in Table 2.
Table 2 example 2 cable material composition
The preparation method of the silane natural light crosslinking halogen-free flame retardant cable material is the same as that of the embodiment 1, and the compositions of the material A and the material B are shown in the table 2.
Example 3
The silane natural light crosslinking halogen-free flame-retardant cable material comprises a material A and a material B, and the composition of each component is shown in Table 3.
Table 3 example 3 cable material composition
The preparation method of the silane natural light crosslinked halogen-free flame-retardant cable material is the same as that of example 1, and the compositions of the material A and the material B are shown in Table 3.
Comparative example 1
The cable material of this example includes a material A and a material B, and the composition of each component is shown in Table 4.
Table 4 composition of comparative example 1 cable material
The cable material of this example was prepared in the same manner as in example 1, with the compositions of the materials A and B being as indicated in Table 4.
Comparative example 2
The cable material of this example includes a material A and a material B, and the composition of each component is shown in Table 5.
Table 5 composition of comparative example 2 cable material
The cable material of this example was prepared in the same manner as in example 1, with the compositions of the materials A and B being as given in Table 5.
The cable materials of examples 1 to 3 and comparative examples 1 to 2 were tested after being left for 48 hours in a natural environment, and the test results of the cable materials of examples 1 to 3 are shown in table 6. The cable material test results of comparative examples 1 to 2 are shown in table 7.
Table 6 results of testing the properties of the cable materials of examples 1 to 3
Table 7 test results of comparative examples 1 to 2 cable materials
The experimental data in tables 6-7 show that the silane natural light crosslinked halogen-free flame-retardant cable material provided by the invention has lower smoke density, can achieve a higher crosslinking effect after being placed for 48 hours in a natural environment, can pass a thermal extension test, and has good surface quality and no dent. Whereas the cable materials of comparative example 1 and comparative example 2 failed the hot-stretch test after standing for 48 h. The cable materials of examples 1-3 allowed to pass the hot-stretch test after being left for 48 hours, whereas comparative example 2 required 168 hours of exposure before passing the test.
The silane natural light crosslinking halogen-free flame-retardant cable material provided by the invention can be applied to preparing cables, has better service performance, is suitable for popularization and application, and has wide market prospect.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. A silane natural light crosslinking halogen-free flame-retardant cable material is characterized in that: comprises a material A and a material B;
the material A comprises the following components in parts by mass: 20 to 34 portions of ethylene-vinyl acetate copolymer, 6 to 15 portions of polyethylene, 55 to 63 portions of halogen-free flame retardant, 1 to 7 portions of initiator, 0.5 to 3 portions of sensitizer, 0.5 to 1 portion of silane coupling agent and 0.1 to 8 portions of A material auxiliary agent; the initiator consists of 0.5 to 4 parts by mass of acylphosphine oxide and 0.5 to 3 parts by mass of triarylsulfonium salt; the acylphosphine oxide is selected from at least one of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 2,4, 6-trimethylbenzoyl-ethoxy-phenylphosphine oxide, and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide; the sensitizer is ethyl p-dimethylaminobenzoate; the material A auxiliary agent comprises at least one of a compatilizer, a lubricant and an antioxidant;
the material B comprises the following components in parts by mass: 88 to 98 portions of polyethylene, 2 to 4 portions of catalyst, 0.5 to 2 portions of cross-linking agent and 0.1 to 0.5 portion of material B auxiliary agent; the material B auxiliary agent comprises an antioxidant;
the mass ratio of the material A to the material B is (93-97): (7-3).
2. The silane natural light crosslinked halogen-free flame-retardant cable material according to claim 1, characterized in that: in the material A and the material B, the polyethylene is metallocene linear low density polyethylene.
3. The silane natural light crosslinked halogen-free flame retardant cable material according to claim 1, characterized in that: the halogen-free flame retardant is at least one selected from aluminum hydroxide, magnesium hydroxide, zinc borate, antimony trioxide, antimony pentoxide, sodium antimonate, barium sulfate, red phosphorus, melamine cyanurate and ammonium polyphosphate.
4. The preparation method of the silane natural light crosslinked halogen-free flame retardant cable material as claimed in any one of claims 1 to 3, characterized in that: the method comprises the following steps:
mixing and banburying ethylene-vinyl acetate copolymer, polyethylene, halogen-free flame retardant, initiator, sensitizer, silane coupling agent and A material auxiliary agent to obtain a mixture, and extruding and granulating the mixture to obtain A material;
mixing polyethylene, a catalyst, a cross-linking agent and a material B auxiliary agent, and extruding and granulating the obtained mixture to obtain a material B; and mixing the material A and the material B to obtain the silane natural light crosslinking halogen-free flame-retardant cable material.
5. A cable, characterized by: at least one part of the cable is prepared from the silane natural light crosslinking halogen-free flame retardant cable material as described in any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010863633.0A CN112063035B (en) | 2020-08-25 | 2020-08-25 | Silane natural light crosslinked halogen-free flame-retardant cable material and preparation method thereof |
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| CN202010863633.0A CN112063035B (en) | 2020-08-25 | 2020-08-25 | Silane natural light crosslinked halogen-free flame-retardant cable material and preparation method thereof |
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| CN112063035A CN112063035A (en) | 2020-12-11 |
| CN112063035B true CN112063035B (en) | 2022-11-11 |
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