CN111635578A - Preparation method of halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cable - Google Patents

Preparation method of halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cable Download PDF

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CN111635578A
CN111635578A CN202010683035.5A CN202010683035A CN111635578A CN 111635578 A CN111635578 A CN 111635578A CN 202010683035 A CN202010683035 A CN 202010683035A CN 111635578 A CN111635578 A CN 111635578A
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retardant
halogen
flame
free low
sheath material
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高团结
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Jiangsu Xiangyun Plastic Technology Co ltd
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Jiangsu Xiangyun Plastic Technology Co ltd
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    • 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
    • C08L23/06—Polyethene
    • 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
    • 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
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • 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
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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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    • 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
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    • C08L2205/00—Polymer mixtures characterised by other features
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    • C08L2312/00—Crosslinking
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Abstract

A preparation method of a halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric automobile cables comprises the following steps of (by weight ratio) PE 10-15, EVA 10-15, POE 5-10, and ethylene propylene rubber: 5-10 (total resin amount is 40), flame-retardant silane: 1-2, aluminum hydroxide: 30-50, magnesium hydroxide: 10-0, liquid crosslinking agent: 3-5, 0.2-0.5 of crosslinking assistant, 0.2-0.3 of antioxidant, and other processing aids: 1-2. The halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material for preparing the electric automobile cable has the functions of acid resistance, alkali resistance and oil resistance, meets the performance of a 125 ℃ halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material, has the irradiation dose of 13-15 joules/kilogram, and is determined according to the thickness and the structure of a wire and cable product.

Description

Preparation method of halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cable
Technical Field
The invention relates to the field of modification of high polymer materials, in particular to a preparation method of a halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cables.
Background
With the rapid development of electric automobiles in China, related supporting industries meet new development opportunities. As an indispensable important component of an electric vehicle, an electric vehicle cable has naturally received a great deal of attention. The following aspects are mainly considered:
1. and (3) natural environment: because the electric automobile cable is exposed outdoors for a long time, various severe natural environments can be encountered in the use process, including large day and night temperature difference change, sunlight irradiation, weathering, humidity, acid rain, freezing, seawater and the like, and the natural environments can seriously influence the service life and the service performance of the charging cable, even reduce the reliability and the safety of the cable, and cause property loss and personal injury.
2. Man-made environment: the cable may be soaked by an acid-base solution artificially, so that the performance of the cable material is affected, and the charging cable is damaged. Since the charging cable for an electric vehicle is used in a relatively harsh environment, the charging cable is required to have higher flexibility, mechanical properties, corrosion resistance, and the like.
3. Safety requirements are as follows: at present, the safety of electric vehicles has become a major concern in the industry. The charging and discharging process of the electric automobile has high cable use frequency due to long time and high current intensity, and the safety of the electric automobile is highly emphasized. On the basis of ensuring good insulating property, the electric automobile cable should have high heat resistance and aging resistance, and meanwhile, should have good low-smoke flame-retardant property during combustion so as to ensure that loss and damage are reduced to the minimum.
For the cable requirements, which are actually the requirements for the cable material, and in combination with the above requirements, the cable material needs to have both: the cable material has good mechanical properties, and has the properties of softness, flame retardance, ozone resistance, acid resistance, alkali resistance, oil resistance, hot water resistance and thermal shrinkage, and the common low-smoke halogen-free cable material only has good mechanical properties and flame retardance.
Disclosure of Invention
The invention aims to provide a halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cables, which can solve the technical problems.
The formula proportion of the halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the electric automobile is as follows: 10-15 parts of PE, 10-15 parts of EVA, 5-10 parts of POE, and ethylene propylene rubber: 5-10 (total resin amount is 40), flame-retardant silane: 1-2, aluminum hydroxide: 30-50, magnesium hydroxide: 10-0, liquid crosslinking agent: 3-5, 0.2-0.5 of crosslinking assistant, 0.2-0.3 of antioxidant, and other processing aids: 1-2.
The process comprises the steps of pretreatment, material compaction except ethylene propylene rubber, twin-screw extrusion, single-screw granulation, particle and ethylene propylene rubber scouring, twin-screw extrusion and single-screw granulation, so that the halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the charging pile cable is prepared
The pretreatment is that aluminum hydroxide and magnesium hydroxide are added with 2% of flame-retardant silane and stirred at a high speed to 140 ℃ to serve as a pretreatment procedure, and the amount of the flame-retardant silane is increased to wrap a layer of oil-resistant flame-retardant silane on the surface of the inorganic flame-retardant material, so that the acid resistance and the alkali resistance of the inorganic material are improved.
The starting is to put the raw materials into a close-milling machine according to the formula, except the ethylene propylene rubber, and to be sealed at the temperature of 110-. The liquid flame retardant silane is added with the liquid flame retardant.
The double-screw extrusion is to add the well-mixed mixture into the double-screw extrusion, and the temperature of the 6 sections of the double screws is set to be 110 ℃ for 100-.
The single-screw extrusion is to add the double-screw extruded material into the single-screw extrusion, and the temperature of the 4 sections of the single screw is set to be 110-.
The product prepared by the invention has the functions of acid resistance, alkali resistance and oil resistance, meets the performance of 125 ℃ halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material, has the irradiation dose of 13-15 joules/kg, and is determined according to the thickness and the structure of the wire and cable product.
The invention has the following beneficial effects:
the product of the invention simultaneously has the following components: good mechanical properties, flexibility, flame retardance, ozone resistance, acid resistance, alkali resistance, oil resistance, hot water resistance and thermal shrinkage.
Detailed Description
The invention is further illustrated, but is not to be construed as limited, by the following examples:
a halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric automobiles is characterized by comprising the following steps:
(1) pretreatment: adding 2 percent of flame-retardant silane into aluminum hydroxide and magnesium hydroxide, and stirring at high speed to 140 ℃ as a pretreatment process.
(2) And (3) refining: the raw materials are densified to 110-120 ℃.
(3) Scouring: the ethylene propylene rubber and the particles are milled together on a double-stick machine.
(4) Double-screw extrusion: the twin screw extrusion plasticizes the material.
(5) Single-screw extrusion granulation: and extruding and granulating the plasticized material.
(6) Air cooling: passing the high-temperature granules through a vibrating screen, and cooling by using cold air
THE ADVANTAGES OF THE PRESENT INVENTION
The liquid flame retardant and the inorganic flame retardant are used for synergistic flame retardance, so that the dosage of the inorganic flame retardant is reduced, and the irradiation crosslinking degree of the product is improved.
The cross-linking agent is a liquid cross-linking agent, so that the cross-linking agent is uniformly dispersed in the production process, and the irradiation cross-linking degree of the product is improved.
The product of the invention has good mechanical properties, and has the properties of softness, flame retardance, ozone resistance, acid resistance, alkali resistance, oil resistance, hot water resistance and heat shrinkage. Meets the performance of the 125 ℃ halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material.
The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.

Claims (9)

1. A preparation method of a halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric automobile cables is characterized by comprising the following steps of (by weight portion) PE 10-15, EVA 10-15, POE 5-10, and ethylene propylene rubber: 5-10 (total resin amount is 40), flame-retardant silane: 1-2, aluminum hydroxide: 30-50, magnesium hydroxide: 10-0, liquid crosslinking agent: 3-5, 0.2-0.5 of crosslinking assistant, 0.2-0.3 of antioxidant, and other processing aids: 1-2.
2. The preparation method of the halogen-free low-smoke flame-retardant cross-linked polyolefin sheathing compound for the electric vehicle cable according to claim 1, wherein the halogen-free low-smoke flame-retardant cross-linked polyolefin sheathing compound for the charging pile cable is prepared through the processes of pretreatment, densification of materials except ethylene propylene rubber, twin-screw extrusion, single-screw granulation, then scouring of particles with the ethylene propylene rubber, twin-screw extrusion and single-screw granulation.
3. The halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the PE is HDPE, and the EVA is EVA with VA content of 28. The ethylene propylene rubber is ethylene propylene diene monomer, and the POE is POE with a melt index of 4.
4. The preparation method of the halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the silane has a flame-retardant function. The crosslinking agent is a liquid crosslinking agent.
5. The preparation method of the halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the pretreatment process comprises the steps of stirring aluminum hydroxide and magnesium hydroxide at a high speed, and adding 2% of flame-retardant silane to 110 ℃.
6. The preparation method of the halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the liquid flame retardant and the inorganic flame retardant are adopted for synergistic flame retardance, so that the dosage of the inorganic flame retardant is reduced, and the irradiation crosslinking degree of the product is improved.
7. The preparation method of the halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the crosslinking agent is a liquid crosslinking agent, so that the crosslinking agent is uniformly dispersed in a production process, and the irradiation crosslinking degree of the product is improved.
8. The preparation method of the halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein all the processing aids are polymer aids, and the molecules are not less than 2000.
9. The preparation method of the halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material for the electric vehicle cable according to claim 1, wherein the product has the functions of acid resistance, alkali resistance and oil resistance, meets the performance of the 125 ℃ halogen-free low-smoke flame-retardant crosslinked polyolefin sheath material, has the irradiation dose of 13-15 joules/kg, and is determined according to the thickness and the structure of the wire and cable product.
CN202010683035.5A 2020-07-15 2020-07-15 Preparation method of halogen-free low-smoke flame-retardant cross-linked polyolefin sheath material for electric vehicle cable Withdrawn CN111635578A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112708186A (en) * 2020-12-28 2021-04-27 苏州铂玛新材料有限公司 Irradiation crosslinking super-flexible bending-resistant wear-resistant low-smoke halogen-free composition and application thereof
CN112745562A (en) * 2020-12-28 2021-05-04 苏州铂玛新材料有限公司 Irradiation crosslinking flexible corrosion-resistant low-smoke halogen-free composition and preparation method and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112708186A (en) * 2020-12-28 2021-04-27 苏州铂玛新材料有限公司 Irradiation crosslinking super-flexible bending-resistant wear-resistant low-smoke halogen-free composition and application thereof
CN112745562A (en) * 2020-12-28 2021-05-04 苏州铂玛新材料有限公司 Irradiation crosslinking flexible corrosion-resistant low-smoke halogen-free composition and preparation method and application thereof

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