CN109957168A - A kind of cable fire-retardant polyethylene cable material and its preparation method and application - Google Patents
A kind of cable fire-retardant polyethylene cable material and its preparation method and application Download PDFInfo
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- CN109957168A CN109957168A CN201711437811.8A CN201711437811A CN109957168A CN 109957168 A CN109957168 A CN 109957168A CN 201711437811 A CN201711437811 A CN 201711437811A CN 109957168 A CN109957168 A CN 109957168A
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K2003/2255—Oxides; Hydroxides of metals of molybdenum
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- C08K2003/387—Borates
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Abstract
The present invention provides a kind of cable fire-retardant polyethylene cable material, raw material by weight, including following component: 50-70 parts of polyvinyl resin；10-30 parts of propylene-ethylene copolymers；10-20 parts of compatilizer；3-5 parts of black masterbatch；30-40 parts of fire retardant；10-20 parts of flame-proof silicon rubber；10-25 parts of fire retarding synergist；5-10 parts of antismoke agent；0.8-1.5 parts of antioxidant；1-2 parts of lubricant.Cable provided by the present invention has excellent anti-flammability, good low cigarette and higher light transmittance, application value with higher with fire-retardant polyethylene cable material.
Description
Technical field
The invention belongs to CABLE MATERIALS technical fields, more particularly to a kind of cable fire-retardant polyethylene cable material and its preparation
Method and purposes.
Background technique
As economic maintains sustained and rapid growth, the awareness of safety of people is increasingly enhanced, and the requirement prevented to safety is increasingly
It is high.It is also such in the use of cable.The a large amount of smog and sour gas that can be generated when cable fire, this is that fire causes people dead
The main reason for dying, people are to avoid the secondary disaster caused by ignition of cable, and to the performance of cable, more stringent requirements are proposed,
The effect of preventing propagation of flame will be had by seeking cable not only, and cable smoke amount in burning is required to want small.
Polyvinyl resin is widely answered because it is with light, odorless, nontoxic, excellent lower temperature resistance and electric property
For the manufacturing of cable, one of the important materials of manufacture cable are become.But polyethylene is easy burning, and burns
It is not easy to extinguish in air afterwards, this is subject to certain restrictions the application of polyethylene.Thus, develop it is a kind of and meanwhile have it is fire-retardant,
Low cigarette, high light transmission poly-ethylene cable material have a very important significance.
Many research staff explore this, and have achieved many achievements.Wherein, application publication number CN
The Chinese invention patent document of 105778216A (application number 201610192336.1) discloses a kind of low-smoke and flame retardant polyethylene electricity
The preparation method of cable material, provides a kind of low cigarette and the CABLE MATERIALS with flame retardant property, but the mechanical property of the cable material
It is not up to state standards, which kind of standard is also reached on earth without open smoke density.Application publication number CN 103804798A
It is fire-retardant poly- that the Chinese invention patent document of (application number CN201210436665.8) discloses a kind of extra-high-tension cable halogen-free type
The preparation method of ethylene protective cover material, the light transmittance although smoke density can achieve requirement, when without open cable fire.Shen
Please the Chinese invention patent document of publication No. CN 104945728A (application number 201510447187.4) disclose a kind of super-pressure
The preparation method of cable low-smoke non-halogen flame-retardant polyethylene sheath material is not examined although light transmittance can reach requirement
The problem of considering smoke density, and the mechanical property of material is not up to state standards.
So existing CABLE MATERIALS can not have both the property of fire-retardant, low cigarette and high light transmission in use, also need further
Optimization.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of cable flame-proof polyethylene electricity
Cable material and its preparation method and application cannot have both fire-retardant, low cigarette and high light transmittance for solving CABLE MATERIALS in the prior art
Problem.
In order to achieve the above objects and other related objects, the present invention provides a kind of cable fire-retardant polyethylene cable material,
Its raw material components and parts by weight are as follows:
Preferably, cable one of is also included the following features or a variety of with fire-retardant polyethylene cable material:
The polyvinyl resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (2-5) g/
10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than or equal to 30Mpa；
The propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melting under 190 DEG C and 2.16Kg
Index is (3-10) g/10min, and tensile break strength is greater than or equal to 20Mpa；
The compatilizer is the combination of Research of Grafting Malaic Anhydride Onto Polyethylene and propylene-ethylene copolymers grafted maleic anhydride；
In the compatilizer, the weight ratio of Research of Grafting Malaic Anhydride Onto Polyethylene and propylene-ethylene copolymers grafted maleic anhydride
For 1:(2~4)；
The black masterbatch by weight percentage, including following components:
Carbon black 50-60%；
Carrier 40-50%.
Preferably, the carrier is polyvinyl resin, and the melt index under 190 DEG C and 2.16Kg is (18-25) g/
10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than or equal to 12Mpa.
Preferably, the fire retardant is inorganic fire retardants.
Preferably, the inorganic fire retardants is flame retardant of magnesium hydroxide.
Preferably, the flame retardant of magnesium hydroxide is wet-process modified through stearic acid, specifically, is used after stearic acid is melted
Alcohol is diluted to 5% concentration, is then added in magnesium hydrate powder according to the ratio of 1:9 with mist, finally at 70 DEG C
It is formed with 1000r/min high-speed stirred.
Preferably, the flame-proof silicon rubber molecular weight is in 80W-100W, contents of ethylene 0.2%-0.4%.
Preferably, the fire retarding synergist is selected from one of zinc borate, zinc oxide and barium borate or a variety of.
Preferably, the antismoke agent is selected from the one or more of molybdenum oxide, ammonium octamolybdate and zinc molybdate.
Preferably, the antioxidant is that the double lauryls of thio-2 acid, polynary hindered phenol and three (2,4- di-t-butyls) are sub-
Phenyl phosphate.
Preferably, in the antioxidant, the double lauryls of thio-2 acid, polynary hindered phenol and three (2,4- di-t-butyls) are sub-
The weight ratio of phenyl phosphate is 1:(0.5~2): (0.5~2).
Preferably, the lubricant is one of magnesium stearate, calcium stearate, zinc stearate and polyethylene wax or more
Kind.
The present invention also provides the preparation methods of the cable fire-retardant polyethylene cable material, include the following steps:
1) each component is put into high-speed mixer according to the proportion and is uniformly mixed, mixing temperature is 55 DEG C -75 DEG C；
2) resulting material in step 1) is put into extruding pelletization in double screw extruder and dried.
Preferably, in the step 1), incorporation time 8min-10min, the revolving speed of the high-speed mixer is
200rpm-1500rpm, it is further preferred that the revolving speed of the mixed at high speed is 600rpm-1200rpm.
Preferably, in the step 2), double screw extruder is feeding extruding pelletization mixed milling type double-screw extruding pelletizing machine,
The extrusion temperature of double screw extruder is 145 DEG C -190 DEG C, it is further preferred that the temperature setting of double screw extruder are as follows: add
145 DEG C -150 DEG C of section, 155 DEG C -175 DEG C of batch mixing segment, 180 DEG C -190 DEG C of extruding pelletization section, 170 DEG C -180 DEG C of head section of material.
Preferably, in the step S2, drying temperature is 70 DEG C -85 DEG C, and drying time is 1-2 hours.
Purposes the present invention also provides the cable fire-retardant polyethylene cable material in extra-high-tension cable protective materials field.
Extra-high-tension cable described herein refers to the power cable of 110kV or more.
As described above, cable fire-retardant polyethylene cable material of the invention, has the advantages that with excellent resistance
The light transmittance of cable can achieve 60% or more when firing performance, good low smoke performance, and being applied to extra-high-tension cable oversheath.
Specific embodiment
Before further describing the specific embodiments of the present invention, it should be appreciated that protection scope of the present invention is not limited to down
State specific specific embodiment；It is also understood that term used in the embodiment of the present invention is specific specific in order to describe
Embodiment, rather than limiting the scope of protection of the present invention.The test method of actual conditions is not specified in the following example,
Usually according to normal condition, or according to condition proposed by each manufacturer.
When embodiment provides numberical range, it should be appreciated that except non-present invention is otherwise noted, two ends of each numberical range
Any one numerical value can be selected between point and two endpoints.Unless otherwise defined, the present invention used in all technologies and
Scientific term is identical as the normally understood meaning of those skilled in the art of the present technique.Except specific method, equipment used in embodiment,
Outside material, grasp and record of the invention according to those skilled in the art to the prior art can also be used and this
Any method, equipment and the material of the similar or equivalent prior art of method described in inventive embodiments, equipment, material come real
The existing present invention.
Embodiment 1
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 2g/
10min, fusing point are 120 DEG C, and tensile break strength is greater than 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 3g/10min, tensile break strength is greater than 20Mpa.
Flame-proof silicon rubber molecular weight is 80W, contents of ethylene 0.2%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than 12Mpa.
Wherein, cable fire-retardant polyethylene cable material the preparation method is as follows:
1) each component is put into high-speed mixer according to the proportion and is uniformly mixed, mixing temperature is 55 DEG C, and incorporation time is
10min, the revolving speed of high-speed mixer are 400rpm；
2) resulting material in step 1) is put into feeding extruding pelletization mixed milling type double-screw extruding pelletizing machine, extruding pelletization
And dry, 145 DEG C of feeding section, 155 DEG C of batch mixing segment, 180 DEG C of extruding pelletization section, 170 DEG C of head section, drying temperature is 70 DEG C,
Drying time is 2 hours.
Embodiment 2
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 4g/
10min, fusing point are 125 DEG C, and tensile break strength is greater than 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 5g/10min, tensile break strength is greater than 20Mpa.
Flame-proof silicon rubber molecular weight is 90W, contents of ethylene 0.3%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than 12Mpa.
The preparation method is the same as that of Example 1 for poly-ethylene cable material, and wherein the mixing temperature in step 1) is 55 DEG C, incorporation time
For 10min, the revolving speed of high-speed mixer is 600rpm；Feeding section temperature in step 2) is 150 DEG C, 160 DEG C of batch mixing segment, is squeezed
It is granulated 185 DEG C of section out, 175 DEG C of head section, drying temperature is 75 DEG C, and drying time is 1 hour.
Embodiment 3
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 5g/
10min, fusing point are 130 DEG C, and tensile break strength is greater than 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 10g/10min, tensile break strength is greater than 20Mpa.
Flame-proof silicon rubber molecular weight is 100W, contents of ethylene 0.4%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is equal to 12Mpa.
The preparation method is the same as that of Example 1 for poly-ethylene cable material, and wherein the mixing temperature in step 1) is 70 DEG C, incorporation time
For 8min, the revolving speed of high-speed mixer is 1500rpm；Feeding section temperature in step 2) is 150 DEG C, 170 DEG C of batch mixing segment, is squeezed
It is granulated 190 DEG C of section out, 180 DEG C of head section, drying temperature is 85 DEG C, and drying time is 1 hour.
Embodiment 4
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 3g/
10min, fusing point are 125 DEG C, and tensile break strength is equal to 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 5g/10min, tensile break strength is greater than 20Mpa.
Flame-proof silicon rubber molecular weight is 95W, contents of ethylene 0.3%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than 12Mpa.
The preparation method is the same as that of Example 1 for poly-ethylene cable material, and wherein the mixing temperature in step 1) is 60 DEG C, incorporation time
For 10min, the revolving speed of high-speed mixer is 1200rpm；Feeding section temperature in step 2) is 145 DEG C, 155 DEG C of batch mixing segment, is squeezed
It is granulated 185 DEG C of section out, 175 DEG C of head section, drying temperature is 70 DEG C, and drying time is 2 hours.
Embodiment 5
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 3g/
10min, fusing point are 125 DEG C, and tensile break strength is greater than 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 8g/10min, tensile break strength is equal to 20Mpa.
Flame-proof silicon rubber molecular weight is 100W, contents of ethylene 0.3%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than 12Mpa.
The preparation method is the same as that of Example 1 for poly-ethylene cable material, and wherein the mixing temperature in step 1) is 75 DEG C, incorporation time
For 8min, the revolving speed of high-speed mixer is 1400rpm；Feeding section temperature in step 2) is 150 DEG C, 175 DEG C of batch mixing segment, is squeezed
It is granulated 190 DEG C of section out, 180 DEG C of head section, drying temperature is 80 DEG C, and drying time is 1 hour.
Embodiment 6
A kind of cable fire-retardant polyethylene cable material, raw material components and parts by weight are as follows:
Wherein, polyoxyethylene resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is 5g/
10min, fusing point are 130 DEG C, and tensile break strength is greater than 30Mpa.
Propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For 6g/10min, tensile break strength is greater than 20Mpa.
Flame-proof silicon rubber molecular weight is 90W, contents of ethylene 0.4%.
Polyvinyl resin carrier is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (18-25)
G/10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is equal to 12Mpa.
The preparation method is the same as that of Example 1 for poly-ethylene cable material, and wherein the mixing temperature in step 1) is 65 DEG C, incorporation time
For 9min, the revolving speed of high-speed mixer is 1100rpm；Feeding section temperature in step 2) is 145 DEG C, 165 DEG C of batch mixing segment, is squeezed
It is granulated 180 DEG C of section out, 170 DEG C of head section, drying temperature is 85 DEG C, and drying time is 1 hour.
The performance test of poly-ethylene cable material:
CABLE MATERIALS made from embodiment 1-6 is tested for the property according to concerned countries standard respectively, gained correlated performance
As a result such as table 1.
Table 1
As can be seen from Table 1, CABLE MATERIALS prepared by the various embodiments described above has passed through bunchy A class combustion test, smoke density
Meet the requirement of GB/32129-2015, light transmittance can achieve 60% or more, meet the requirement of IEC-61034-2-2005.Cause
And there is excellent flame retardant property, good low smoke performance and higher light transmittance.
In conclusion the present invention effectively overcomes various shortcoming in the prior art and industry exploitation value with higher
Value.
The above, only presently preferred embodiments of the present invention, not to the present invention in any form with substantial limitation,
It should be pointed out that under the premise of not departing from the method for the present invention, can also be made for those skilled in the art
Several improvement and supplement, these are improved and supplement also should be regarded as protection scope of the present invention.All those skilled in the art,
Without departing from the spirit and scope of the present invention, when made using disclosed above technology contents it is a little more
Dynamic, modification and the equivalent variations developed, are equivalent embodiment of the invention；Meanwhile all substantial technologicals pair according to the present invention
The variation, modification and evolution of any equivalent variations made by above-described embodiment, still fall within the range of technical solution of the present invention
It is interior.
Claims (10)
1. a kind of cable fire-retardant polyethylene cable material, which is characterized in that the raw material components and weight of the poly-ethylene cable material
Part is as follows:
2. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that including one of following feature
Or it is a variety of:
The carrier is polyvinyl resin, and the melt index under 190 DEG C and 2.16Kg is (18-25) g/10min, and fusing point is
120 DEG C~130 DEG C, tensile break strength is greater than or equal to 12Mpa；
The polyvinyl resin is linear low density polyethylene, and the melt index under 190 DEG C and 2.16Kg is (2-5) g/
10min, fusing point are 120 DEG C~130 DEG C, and tensile break strength is greater than or equal to 30Mpa；
The propylene-ethylene copolymers are using propylene as main chain, and ethylene is branch, the melt index under 190 DEG C and 2.16Kg
For (3-10) g/10min, tensile break strength is greater than or equal to 20Mpa；
The compatilizer is the combination of Research of Grafting Malaic Anhydride Onto Polyethylene and propylene-ethylene copolymers grafted maleic anhydride；
In the compatilizer, the weight ratio of Research of Grafting Malaic Anhydride Onto Polyethylene and propylene-ethylene copolymers grafted maleic anhydride is 1:
(2~4)；
The black masterbatch by weight percentage, including following components:
Carbon black 50-60%；
Carrier 40-50%.
3. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the fire retardant is inorganic fire-retarded
Agent, the inorganic fire retardants are the flame retardant of magnesium hydroxide wet-process modified through stearic acid.
4. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the flame-proof silicon rubber molecular weight
For 80W-100W, contents of ethylene 0.2%-0.4%.
5. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the fire retarding synergist is selected from boron
One of sour zinc, zinc oxide and barium borate are a variety of.
6. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the antismoke agent is selected from oxidation
Molybdenum, ammonium octamolybdate and zinc molybdate it is one or more.
7. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the antioxidant is thio dipropyl
The combination of sour double lauryls, polynary hindered phenol and three (2,4- di-t-butyl) phenyl-phosphites, in the antioxidant, thio dipropyl
The weight ratio of sour double lauryls, polynary hindered phenol and three (2,4- di-t-butyl) phenyl-phosphites is 1:1:(0.2-0.5).
8. cable fire-retardant polyethylene cable material as described in claim 1, which is characterized in that the lubricant is selected from stearic acid
One of magnesium, calcium stearate, zinc stearate and polyethylene wax are a variety of.
9. the preparation method of cable fire-retardant polyethylene cable material as claimed in any one of claims 1 to 8, including walk as follows
It is rapid:
1) each component is put into high-speed mixer according to the proportion and is uniformly mixed, mixing temperature is 55 DEG C -75 DEG C；
2) resulting material in step 1) is put into extruding pelletization in double screw extruder and dried.
10. the described in any item cable fire-retardant polyethylene cable materials of claim 1 to 8 are in extra-high-tension cable protective materials field
Purposes.
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Application publication date: 20190702 |