CN112608551A - Halogen-free low-smoke flame-retardant crosslinked polyethylene material and preparation method thereof - Google Patents
Halogen-free low-smoke flame-retardant crosslinked polyethylene 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
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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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
- 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
- C08L2201/22—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
- 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
Abstract
The invention provides a halogen-free low-smoke flame-retardant crosslinked polyethylene material and a preparation method thereof, wherein the halogen-free low-smoke flame-retardant crosslinked polyethylene material comprises the following raw materials in parts by weight: 25-35 parts of metallocene linear low-density polyethylene, 55-65 parts of linear low-density polyethylene, 10-15 parts of maleic anhydride grafted polyethylene, 80-100 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1-2 parts of coupling agent, 10 parts of black master batch and 2-3 parts of crosslinking accelerator. The halogen-free low-smoke flame-retardant crosslinked polyethylene material provided by the invention has the advantages that the processing technology is easier to control, and the production cost is reduced; overcomes the defects of easy agglomeration, large addition amount and poor mechanical property of the flame retardant in the existing halogen-free flame-retardant crosslinked polyethylene material, and ensures that the halogen-free flame-retardant crosslinked polyethylene material has good flame-retardant effect, small smoke generation amount, better impact resistance and excellent comprehensive mechanical property.
Description
Technical Field
The invention relates to the technical field of flame-retardant materials, in particular to a halogen-free low-smoke flame-retardant crosslinked polyethylene material and a preparation method thereof.
Background
Polyethylene is a common thermoplastic plastic with light weight, no toxicity, environmental protection and excellent electrical insulation property, and is widely applied to the field of wires and cables. At present, flame-retardant polyethylene materials and PVC mainly containing halogen in the market are not environment-friendly due to the halogen, and can release a large amount of toxic and harmful gases after combustion, so that the harm is extremely large. Therefore, there is a need to develop a halogen-free low-smoke flame-retardant crosslinked polyethylene material, which ensures that the material has good flame retardancy, excellent mechanical properties, small smoke generation amount and good impact resistance.
Disclosure of Invention
The invention aims to provide a halogen-free low-smoke flame-retardant crosslinked polyethylene material and a preparation method thereof, solves the technical problem of how to develop the halogen-free low-smoke flame-retardant crosslinked polyethylene material, ensures that the material has good flame retardance and excellent mechanical properties, and has small smoke generation amount and good impact resistance.
A halogen-free low-smoke flame-retardant cross-linked polyethylene material and a preparation method thereof are characterized by comprising the following raw materials in parts by weight: 25-35 parts of metallocene linear low-density polyethylene, 55-65 parts of linear low-density polyethylene, 10-15 parts of maleic anhydride grafted polyethylene, 80-100 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1-2 parts of coupling agent, 10 parts of black master batch and 2-3 parts of crosslinking accelerator.
The flame retardant is a compound of two or more of aluminum hydroxide, magnesium hydroxide by an ore method, red phosphorus and aluminum diethylphosphinate.
The lubricant is compounded by one or two of silicone powder and PE wax.
The maleic anhydride grafted polyethylene is commercially available, has a grafting rate of about 0.92 percent, and is under the mark MC218, and the manufacturer is Ningbo optical New Material science and technology, Inc.
The antioxidant is 1 part of tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 1 part of dioctadecyl thiodipropionate.
The coupling agent is vinyl tri (beta-methoxy vinyl) silane.
The black master batch contains 45% of carbon black and 55% of matrix resin polyethylene.
The crosslinking accelerator is one or a compound of two of triallyl isocyanurate and trihydroxy methyl acrylate.
A preparation method of a halogen-free low-smoke flame-retardant crosslinked polyethylene material comprises the following steps of sequentially adding metallocene linear low-density polyethylene, maleic anhydride grafted polyethylene, a flame retardant, a lubricant, an antioxidant, a coupling agent, black master and a crosslinking accelerator into an internal mixer, then starting mixing, discharging when the material temperature is about 135 ℃, feeding into a conical feeding hopper, extruding, granulating and cooling by a double-screw extruder to obtain the product.
Firstly, the parameter requirements of the mixing process are as follows:
the charging sequence is as follows: pouring the resin and the auxiliary agent small material, mixing for 1-2 minutes, pouring the aluminum hydroxide powder, and capping.
And (3) material turning temperature: turning over at 110 deg.C, 120 deg.C and 130 deg.C, and covering after the material is turned over.
Discharging temperature: 130 ℃ and 135 ℃.
Secondly, the requirements of extrusion process parameters are as follows:
1. twin screw temperature setting
2. Single screw temperature setting
3. Rotational speed setting
The rotating speed of the main machine is as follows: 280-300 RPM; single screw rotation speed: 350-360 RPM; conical double rotating speeds; 270-.
Thirdly, the granulation parameters require:
the granulation frequency is set, the particle size is about 3mm-4mm diameter, the height is 3mm cylindrical granular object, the reference frequency is 18.5-19.6 HZ.
Compared with the prior art, the invention has the beneficial effects that:
the halogen-free low-smoke flame retardant is selected for compounding, so that the flame retardant is low in addition amount, meets the mechanical property, has a high flame retardant effect, is low in smoke, does not generate harmful and corrosive gases, cannot cause secondary disasters, and is safe and environment-friendly. In addition, the defects of easy agglomeration, large addition amount and poor mechanical property of the flame retardant in the existing halogen-free flame-retardant crosslinked polyethylene material are overcome, so that the halogen-free flame-retardant crosslinked polyethylene material has good flame-retardant effect, small smoke generation amount, good impact resistance and excellent comprehensive mechanical property.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is described below by way of specific embodiments.
Example 1
The halogen-free low-smoke flame-retardant crosslinked polyethylene material and the preparation method thereof in the embodiment comprise the following raw materials in parts by weight:
30 parts of metallocene linear low-density polyethylene, 60 parts of linear low-density polyethylene, 10 parts of maleic anhydride grafted polyethylene, 100 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1-2 parts of coupling agent, 10 parts of black master batch and 2 parts of crosslinking accelerator.
Wherein the flame retardant comprises 70 parts of aluminum hydroxide, 20 parts of mineral magnesium hydroxide and 10 parts of red phosphorus.
Wherein the lubricant comprises 3 parts of silicone powder and 2 parts of PE wax.
Wherein the above-mentioned maleic anhydride grafted polyethylene is commercially available, the grafting rate is about 0.92%, and the brand MC218 is available from the company Limited for science and technology of optical new materials of Nippon wave energy.
Wherein, the antioxidant is 1 part of tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 1 part of dioctadecyl thiodipropionate.
Wherein the coupling agent is vinyl tri (beta-methoxy vinyl) silane.
Wherein, the content of the black master batch carbon black is 45 percent, and the content of the matrix resin polyethylene is 55 percent.
Wherein the crosslinking accelerator is triallyl isocyanurate.
The preparation method of the halogen-free low-smoke flame-retardant crosslinked polyethylene material comprises the following steps of sequentially adding 30 parts of metallocene linear low-density polyethylene, 60 parts of linear low-density polyethylene, 10 parts of maleic anhydride grafted polyethylene, 100 parts of a flame retardant, 5 parts of a lubricant, 2 parts of an antioxidant, 2 parts of a coupling agent, 10 parts of black master batch and 2 parts of a crosslinking accelerator into an internal mixer, then starting mixing, discharging when the material temperature is about 135 ℃, feeding into a conical feeding hopper, extruding, granulating and cooling by a double-screw extruder to obtain the product.
Firstly, the parameter requirements of the mixing process are as follows:
1. the charging sequence is as follows: pouring resin and auxiliary small materials, mixing for 1-2 minutes, pouring aluminum hydroxide powder, and pressing a cover;
2. and (3) material turning temperature: turning over at 110 deg.C, 120 deg.C and 130 deg.C, and pressing cover after the material is turned over;
3. discharging temperature: 130 ℃.
Secondly, the requirements of extrusion process parameters are as follows:
1. twin screw temperature setting
2. Single screw temperature setting
| Zone(s) | Eight-part | Nine-piece | Ten pieces of cloth | Eleven points of the design | Twelve aspects | Thirteen-layer rubber | Fourteen-layer |
| Temperature/. degree.C | 70±10 | 70±10 | 70±10 | 80±10 | 90±10 | 110±10 | 120±10 |
3. Rotational speed setting
The rotating speed of the main machine is as follows: 300 RPM; single screw rotation speed: 360 RPM; conical double rotating speed: 290 RPM.
Thirdly, the granulation parameters require:
the cutting frequency is set to a particle size of about 3mm to 4mm in diameter and 3mm in height, and the reference frequency is 19.6 HZ.
The performance test results of the cable samples extruded from the sheath material are shown in table 1.
Example 2
The halogen-free low-smoke flame-retardant crosslinked polyethylene material and the preparation method thereof in the embodiment comprise the following raw materials in parts by weight:
25 parts of metallocene linear low-density polyethylene, 60 parts of linear low-density polyethylene, 15 parts of maleic anhydride grafted polyethylene, 90 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1.5 parts of coupling agent, 10 parts of black master batch and 3 parts of crosslinking accelerator.
Wherein the flame retardant comprises 75 parts of mineral magnesium hydroxide and 15 parts of red phosphorus.
Wherein, the lubricant is 5 parts of silicone powder.
Wherein the above-mentioned maleic anhydride grafted polyethylene is commercially available, the grafting rate is about 0.92%, and the brand MC218 is available from the company Limited for science and technology of optical new materials of Nippon wave energy.
Wherein, the antioxidant is 1 part of tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 1 part of dioctadecyl thiodipropionate.
Wherein the coupling agent is vinyl tri (beta-methoxy vinyl) silane.
Wherein, the content of the black master batch carbon black is 45 percent, and the content of the matrix resin polyethylene is 55 percent.
Wherein the crosslinking accelerator is trihydroxy methyl acrylate.
The invention provides a halogen-free low-smoke flame-retardant crosslinked polyethylene material and a preparation method thereof, which comprises the following steps of sequentially adding 25 parts of metallocene linear low-density polyethylene, 60 parts of linear low-density polyethylene, 15 parts of maleic anhydride grafted polyethylene, 90 parts of a flame retardant, 5 parts of a lubricant, 2 parts of an antioxidant, 1.5 parts of a coupling agent, 10 parts of black master batch and 3 parts of a crosslinking accelerator into an internal mixer, then starting mixing, discharging and feeding into a conical feeding hopper when the material temperature is about 135 ℃, and extruding, granulating and cooling by a double-screw extruder to obtain the product.
Firstly, the parameter requirements of the mixing process are as follows:
1. the charging sequence is as follows: pouring resin and auxiliary small materials, mixing for 1-2 minutes, pouring aluminum hydroxide powder, and pressing a cover;
2. and (3) material turning temperature: turning over at 110 deg.C, 120 deg.C and 130 deg.C, and pressing cover after the material is turned over;
3. discharging temperature: 135 ℃ is adopted.
Secondly, the requirements of extrusion process parameters are as follows:
1. twin screw temperature setting
| Zone(s) | A | II | III | Fourthly | Five of them | Six ingredients | Seven-piece |
| Temperature/. degree.C | 120±10 | 110±10 | 100±10 | 90±10 | 90±10 | 90±10 | 90±10 |
2. Single screw temperature setting
| Zone(s) | Eight-part | Nine-piece | Ten pieces of cloth | Eleven points of the design | Twelve aspects | Thirteen-layer rubber | Fourteen-layer |
| Temperature/. degree.C | 70±10 | 70±10 | 70±10 | 80±10 | 90±10 | 110±10 | 120±10 |
3. Rotational speed setting
The rotating speed of the main machine is as follows: 280 RPM; single screw rotation speed: 350 RPM; conical double rotating speed: 280 RPM.
Thirdly, the granulation parameters require:
the granulation frequency was set to a particle size of about 3mm to 4mm in diameter and 3mm in height for cylindrical pellets, with a reference frequency of 18.7 Hz.
The performance test results of the cable samples extruded from the sheath material are shown in table 1.
Example 3
The halogen-free low-smoke flame-retardant crosslinked polyethylene material and the preparation method thereof in the embodiment comprise the following raw materials in parts by weight:
25 parts of metallocene linear low-density polyethylene, 65 parts of linear low-density polyethylene, 10 parts of maleic anhydride grafted polyethylene, 80 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1 part of coupling agent, 10 parts of black master batch and 2 parts of crosslinking accelerator.
Wherein the flame retardant comprises 65 parts of aluminum hydroxide and 15 parts of diethyl aluminum phosphinate.
Wherein the lubricant comprises 4 parts of silicone powder and 1 part of PE wax.
Wherein the maleic anhydride grafted polyethylene is commercially available, the grafting rate is about 0.92%, and the mark MC218 is available from the company Limited for science and technology of optical new materials of Nippon wave energy.
Wherein, the antioxidant is 1 part of tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 1 part of dioctadecyl thiodipropionate.
Wherein the coupling agent is vinyl tri (beta-methoxy vinyl) silane.
Wherein, the content of the black master batch carbon black is 45 percent, and the content of the matrix resin polyethylene is 55 percent.
Wherein the crosslinking accelerator is triallyl isocyanurate.
The invention provides a halogen-free low-smoke flame-retardant crosslinked polyethylene material and a preparation method thereof, which comprises the following steps of sequentially adding 25 parts of metallocene linear low-density polyethylene, 65 parts of linear low-density polyethylene, 10 parts of maleic anhydride grafted polyethylene, 80 parts of a flame retardant, 5 parts of a lubricant, 2 parts of an antioxidant, 1 part of a coupling agent, 10 parts of a black master batch and 2 parts of a crosslinking accelerator into an internal mixer, then starting mixing, discharging and feeding into a conical feeding hopper when the material temperature is about 135 ℃, extruding, granulating and cooling by a double-screw extruder to obtain the product.
Firstly, the parameter requirements of the mixing process are as follows:
1. the charging sequence is as follows: pouring resin and auxiliary small materials, mixing for 1-2 minutes, pouring aluminum hydroxide powder, and pressing a cover;
2. and (3) material turning temperature: turning over at 110 deg.C, 120 deg.C and 130 deg.C, and covering after the material is turned over.
3. Discharging temperature: 130 ℃.
Secondly, the requirements of extrusion process parameters are as follows:
1. twin screw temperature setting
| Zone(s) | A | II | III | Fourthly | Five of them | Six ingredients | Seven-piece |
| Temperature/. degree.C | 120±10 | 110±10 | 100±10 | 90±10 | 90±10 | 90±10 | 90±10 |
2. Single screw temperature setting
| Zone(s) | Eight-part | Nine-piece | Ten pieces of cloth | Eleven points of the design | Twelve aspects | Thirteen-layer rubber | Fourteen-layer |
| Temperature/. degree.C | 70±10 | 70±10 | 70±10 | 80±10 | 90±10 | 110±10 | 120±10 |
3. Rotational speed setting
The rotating speed of the main machine is as follows: 285 RPM; single screw rotation speed: 350 RPM; conical double rotating speed: 285 RPM.
Thirdly, the granulation parameters require:
the cutting frequency is set to a particle size of about 3mm to 4mm in diameter and 3mm in height, and the reference frequency is 19.1 HZ.
The performance test results of the cable samples extruded from the sheath material are shown in table 1.
Table 1 table for testing the performance of cable samples extruded from sheathing materials in different embodiments
The above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Features of the invention which are not described in the present patent application can be implemented by or using the prior art, and are not described herein again, it is to be understood that the above description is not intended to limit the invention, and the invention is not limited to the above examples, and those skilled in the art can make changes, modifications, additions or substitutions within the spirit and scope of the invention.
Claims (8)
1. A halogen-free low-smoke flame-retardant crosslinked polyethylene material is characterized by comprising the following raw materials in parts by weight: 25-35 parts of metallocene linear low-density polyethylene, 55-65 parts of linear low-density polyethylene, 10-15 parts of maleic anhydride grafted polyethylene, 80-100 parts of flame retardant, 5 parts of lubricant, 2 parts of antioxidant, 1-2 parts of coupling agent, 10 parts of black master batch and 2-3 parts of crosslinking accelerator.
2. The halogen-free, low-smoke, flame-retardant, crosslinked polyethylene material according to claim 1, wherein the flame retardant is a combination of two or more of aluminum hydroxide, magnesium hydroxide from ore, red phosphorus and aluminum diethylphosphinate.
3. The halogen-free low-smoke flame-retardant crosslinked polyethylene material according to claim 2, wherein the lubricant is a compound of one or two of silicone powder and PE wax.
4. The halogen-free low-smoke flame-retardant crosslinked polyethylene material according to claim 3, wherein the antioxidant is 1 part of tetra [ beta- (3.5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 1 part of dioctadecyl thiodipropionate.
5. The halogen-free, low-smoke, flame-retardant, crosslinked polyethylene material according to claim 4, characterized in that the coupling agent is vinyltris (β -methoxyvinyl) silane.
6. The halogen-free low-smoke flame-retardant crosslinked polyethylene material according to claim 5, wherein the black masterbatch has a carbon black content of 45% and the matrix resin polyethylene content of 55%.
7. The halogen-free low-smoke flame-retardant crosslinked polyethylene material according to claim 6, wherein the crosslinking accelerator is one of triallyl isocyanurate and trimethylol acrylate or a combination of both.
8. A preparation method of a halogen-free low-smoke flame-retardant crosslinked polyethylene material is characterized by comprising the following steps:
step S01: sequentially adding metallocene linear low-density polyethylene, maleic anhydride grafted polyethylene, a flame retardant, a lubricant, an antioxidant, a coupling agent, black master batch and a crosslinking accelerator into an internal mixer, and then starting mixing;
step S02: mixing until the material temperature is about 135 ℃, discharging, and feeding into a conical feeding hopper;
step S03: extruding and granulating by a double-screw extruder;
step S04: cooling to obtain the product.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115197489A (en) * | 2022-06-10 | 2022-10-18 | 深圳市沃尔核材股份有限公司 | Wire and cable material and preparation method thereof |
| CN115197489B (en) * | 2022-06-10 | 2023-12-12 | 深圳市沃尔核材股份有限公司 | Wire and cable material and preparation method thereof |
| CN116515196A (en) * | 2023-06-05 | 2023-08-01 | 东莞市安高瑞新材料科技有限公司 | Halogen-free low-smoke flame-retardant crosslinked polyethylene material and preparation method thereof |
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