CN107857932A - It is chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material and preparation method thereof - Google Patents
It is chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material and preparation method thereof Download PDFInfo
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- CN107857932A CN107857932A CN201711178000.0A CN201711178000A CN107857932A CN 107857932 A CN107857932 A CN 107857932A CN 201711178000 A CN201711178000 A CN 201711178000A CN 107857932 A CN107857932 A CN 107857932A
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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
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Abstract
One kind chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material and preparation method thereof, it is 80 parts of the binder resin that will first weigh in parts by weight, 10~30 parts of compatilizer, 100~145 parts of inorganic combustion inhibitor, 3~10 parts of fire retarding synergist, 1.5~3.5 parts of crosslinking agent, 1.0~2.0 parts of crosslinking sensitizer, 0.1~1 part of stabilizer, in 2~4 parts of lubricant and 2.0~5.5 parts of input high-speed mixers of antioxidant, stirred under normal temperature, blowing enters banburying in banbury again, then by material with force taper feeding manner feed single screw extrusion machine, the pelletizing successively after single screw extrusion machine is extruded, cooling, packaging, obtain being chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material, binder resin is made up of the following raw material matched in parts by weight：10 40 parts of 40 70 parts of ethylene copolymer and polyolefin elastomer.Improve temperature resistant grade, avoid precrosslink；Concise in technology, preparation efficiency are high.
Description
Technical field
The invention belongs to insulate to use technical field of polymer materials, and in particular to one kind chemical crosslinking low-smoke non-halogen flame-retardant gathers
Alkene CABLE MATERIALS, and further relate to its preparation method.
Background technology
Cross-linked polyolefin is molecular polyolefin is changed into three-dimensional netted knot from linear molecular structure using physico-chemical process
Structure, thermosets is changed into by thermoplastic, uses so as to improve its heat resistance and mechanical performance and expand its use
Scope.
At present, electric wire crosslinking type low-smoke halogen-free flame-retardant polyolefin material, in China mainly based on cross-linking radiation,
But cross-linking radiation is by irradiation intensity and angle and material thickness due to being limited, normally only suitable for thinner thickness, structure
Regular electric wire, and most of cable factory does not have irradiation apparatus, needs consigned processing to complete this procedure, itself can not be complete
Ensure and control irradiates quality.
To overcome disadvantages described above, numerous material producers start to make low smoke halogen-free flame-retardant polyolefin using crosslinked with silicane mode
Crosslink material, although but crosslinked with silicane production is simple and quick, equipment investment is small, the process control of crosslinking have it is certain not
Stability, such as easily occur precrosslink, processing temperature narrow range, be crosslinked required steam easily with hydrophilic sex flame retardant in material
With reference to and cause the decline of its electrical property and mechanical property.
It is usually used in the crosslinked polyetylene insulated chemical crosslinking mode of medium and high voltage cable and then shows as extrusion molding and crosslinking company
It is continuous to carry out, crosslink material is triggered using high temperature, not limited by cable morphosis, and cross-linking process is stably and controllable.
Therefore, the temperature in use of low-smoke halide-free fireproof composite polyolefine material is improved using chemical crosslinking mode, prepares chemistry
Cross-linking low smoke halogen-free fire retardant polyolefin cable material can be greatly improved the production efficiency of cable producer and meet that quality controllability will
Ask." a kind of flexible chemical crosslinking low-smoke and halogen-free flame retardant polyolefin jacket material and the system that Chinese patent CN105367882A recommends
Preparation Method " has carried out the trial of such a method, but the production process of its CABLE MATERIALS needs first to pass through the material of Part I
Mixer mixing (banburying, as follows), the material for adding Part II are kneaded, then thin logical in mill, tri-roll press machine
Rolling out film, then add last part material and repeat above procedure.The cumbersome efficiency of production process is low, cost is high, and adopts
By the use of DCP as cross-linked evocating agent, easily occur in the process of banburying mill and cable extrusion for several times in production stage pre-
Crosslinking.Therefore, its actual industrialized production and the possibility used are relatively low.
" preparation of chemical crosslinking halide-free fireproof composite polyolefine material and the use that publication No. CN105885188A is provided
Method " overcomes the defects of mixing temperature height causes precrosslink to produce although being first prepared for the masterbatch without crosslinking agent, but together
There is crosslink agent DCP and the problem of producing precrosslink decomposed during CABLE MATERIALS extrusion molding in sample, and similarly presence needs elder generation
Single screw extrusion prepares masterbatch after partial material experience banburying, then the process of crosslinking agent is added dropwise simultaneously through twin-screw extrusion, causes
Production process is complicated.
Based on above-mentioned prior art, explore more succinct production technology and use and improve production efficiency and using more
Effective material combinations come overcome material produce and use during precrosslink defect there is positive effect, will be described below
Technical scheme be caused under this background.
The content of the invention
The top priority of the present invention is to provide a kind of chemistry for being favorably improved temperature resistant grade, being advantageous to avoid precrosslink
Cross-linking low smoke halogen-free fire retardant polyolefin cable material.
Another task of the present invention is to provide a kind of preparation side for being chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material
Method, this method is with preparation technology is succinct, preparation efficiency is high and obtained CABLE MATERIALS can be ensured with preferable temperature resistant grade
And precrosslink can be avoided.
What the top priority of the present invention was performed by, one kind chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material,
It is made up of the following raw material matched in parts by weight：
Described binder resin is made up of the following raw material matched in parts by weight：Ethylene copolymer 40-70 parts and polyene
Olefin elastomer 10-40 parts.
The present invention a specific embodiment in, described ethylene copolymer be ethylene-vinyl acetate copolymer,
Ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer or ethylene-butyl acrylate copolymer；The ethene is total to
The quality % contents of comonomer are equal to or more than 18%, DSC fusing points and are less than 85 DEG C in polymers.
In another specific embodiment of the present invention, described polyolefin elastomer is DSC fusing points less than 85 DEG C
Ethylene-octene copolymer, ethylene-butene copolymer or ethylene-hexene co-polymers.
In another specific embodiment of the present invention, described compatilizer is that maleic anhydride grafted ethene-butylene is common
Polymers, maleic anhydride grafted ethene-octene copolymer, maleic anhydride grafted ethene-methyl acrylate copolymer, maleic anhydride connect
Branch ethylene-ethyl acrylate copolymer or maleic anhydride grafting EP rubbers.
In another specific embodiment of the present invention, described inorganic combustion inhibitor is magnesium hydroxide and miemite
Mixture；Described fire retarding synergist is hypo-aluminum orthophosphate, Firebrake ZB or CNT.
In the also specific embodiment of the present invention, described crosslinking agent is double (the tertiary fourths of 2,5- dimethyl -2,5-
Base peroxide) -3- hexins；Described crosslinking sensitizer is Triallyl isocyanurate.
In a still more specific embodiment of the invention, described stabilizer is 2,2- diphenyl -1- trinitrobenzens
Hydrazine (DPPH), 1,4-benzoquinone, tetramethyl-benzoquinone, 2- methyl -2- nitromethanes or phenyl-N- tert-butylnitrones.
The present invention's and then in a specific embodiment, described lubricant is multi-hydroxy stearic acid magnesium, silicone, length
One or more of combinations in chain alcohol polyester.
Described antioxidant is four [β-(3 ', 5 '-two tertiary fourths in yet a further embodiment of the present invention
Base -4 '-hydroxy phenyl) propionic acid] pentaerythritol ester, three (2,4- di-tert-butyl-phenyls) phosphite esters, it is double (3,5- di-t-butyls -
4- hydroxy benzenes propionyl) hydrazine, 4,4'- thiobis (the 6- tert-butyl group -3- methylphenols) and 1,3,5, three (3,5- di-t-butyls, 4-
Hydroxybenzyl) two or three of combination in s-triazine.
What another task of the present invention was performed by, a kind of chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material
Preparation method, its be first by 10~30 parts of 80 parts of binder resin, compatilizer weighing in parts by weight, inorganic combustion inhibitor 100~
145 parts, 3~10 parts of fire retarding synergist, 1.5~3.5 parts of crosslinking agent, 1.0~2.0 parts of crosslinking sensitizer, 0.1~1 part of stabilizer,
In 2~4 parts of lubricant and 2.0~5.5 parts of input high-speed mixers of antioxidant, stir 2-5min under normal temperature, then blowing enter it is close
In mill, 8~15min of banburying at a temperature of 110 DEG C~120 DEG C, then by material to force taper feeding manner to feed single spiral shell
Bar extruder, the extrusion temperature of single screw extrusion machine are 95-110 DEG C, after single screw extrusion machine is extruded successively pelletizing, cooling,
Packaging, obtain being chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material, wherein：Described binder resin by it is following in parts by weight
The raw material composition of proportioning：Ethylene copolymer 40-70 parts and polyolefin elastomer 10-40 parts.
One of beneficial effect of technical scheme provided by the invention, low-smoke non-halogen flame-retardant is improved using chemical crosslinking mode and gathered
The temperature resistant grade of alkene CABLE MATERIALS, cross-linking radiation is overcome due to being limited by irradiation intensity and angle and material thickness, one
As be only applicable to thinner thickness, the electric wire of compound with regular structure and the defects of need consigned processing to irradiate, overcome crosslinked with silicane
Precrosslink, processing temperature narrow range easily occur for mode, are crosslinked required steam and are easily combined with hydrophilic sex flame retardant in material
So as to cause the decline of its electrical property and mechanical property；Two, use than crosslinking agent used in general crosslinked electric cable material point in component
The higher crosslinking agent of temperature is solved, and is added with stabilizer, it is pre- in processing and cable extrusion to successfully solve material
Crosslinking problem.The fire retardant and fire retarding synergist decomposition temperature of use are all higher, will not be sent out in the cross-linking vulcanized pipeline of high temperature
Solution estranged, the demand for being satisfied by industrialized production and having used.
Embodiment
Formula is as follows：
The quality % contents of Vinyl Acetate Monomer are the ethylene-vinyl acetate that 33% and DSC fusing points are less than 85 DEG C
60 parts of copolymer, DSC fusing points are less than 85 DEG C of 20 parts of ethylene-octene copolymer elastomer Engage8200, maleic anhydride grafting
10 parts of ethylene-vinyl acetate copolymer, 100 parts of magnesium hydroxide, 40 parts of miemite, 10 parts of hypo-aluminum orthophosphate, 2,5- dimethyl-
2,5- double 1.8 parts of (t-butyl peroxy) -3- hexins, 1.0 parts of Triallyl isocyanurate, 2,2- diphenyl -1- trinitrobenzens
0.8 part of hydrazine, 1 part of multi-hydroxy stearic acid magnesium, 2.5 parts of silicone, four [β-(3 ', 5 '-di-t-butyl -4 '-hydroxy phenyl) propionic acid] seasons
2.0 parts of Doutrate, three 1 part of (2,4- di-tert-butyl-phenyl) phosphite esters, 4,4'- thiobis (the 6- tert-butyl group -3- methylbenzenes
Phenol) 1 part.
Preparation method is：Weighed above-mentioned in material input high-speed mixer, high-speed stirred is sufficiently mixed 3min, then will
In this material mixed input banbury, in 110 DEG C of abundant banburying 10min, by this material to force the throwing of taper feeding manner
Enter melting extrusion in single screw extrusion machine, processing temperature be extrusion temperature at 95 DEG C~110 DEG C, through pelletizing, cooling, packaging, i.e.,
Low smoke halogen-free fire retardant polyolefin cable material must be chemically crosslinked.
By granular chemical cross-linking low smoke halogen-free fire retardant polyolefin cable material in the mill mixing that temperature setting is 110 DEG C
1min, test piece, performance test such as table 1 are compressed under 15min*200 DEG C of * 15MPa conditions of vulcanization.
Performance test after the sizing material tabletting of table 1 vulcanization
Obtained chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material is extruded in cable extruding machine, extrusion temperature is set
It is 90 DEG C to spend (one to five area, head, mould), 105 DEG C, 110 DEG C, 115 DEG C, 115 DEG C, 115 DEG C, 110 DEG C, extrudes insulating layer thickness
Spend and be directly entered curing tube vulcanization for 1.0mm, linear velocity 20m/min, extrusion cable, it is 240 that curing tube, which sets temperature,
DEG C~285 DEG C, it is pressure 3~5MPa nitrogen atmospheres that pipeline is interior, enters back into tank cooling.Continuous extrusion cable insulation 4h, electricity
Cable surface smooth even, no Weak gel particle and stiff block occur, sheath section pore-free.
Power taking cable is tested, test result such as table 2.
The finished cable performance test of table 2
Embodiment 2
Formula is as follows：
The quality % contents of methacrylate monomer are the ethylene-methyl acrylate that 24% and DSC fusing points are less than 85 DEG C
40 parts of copolymer, DSC fusing points are less than 85 DEG C of 40 parts of ethylene-butene copolymer elastomer, and maleic anhydride grafted ethene-octene is common
20 parts of copolymer elastomers, 90 parts of magnesium hydroxide, 10 parts of miemite, 3 parts of Firebrake ZB, the double (tert-butyl group mistakes of 2,5- dimethyl -2,5-
Oxygen) 3.5 parts of -3- hexins, 1.5 parts of Triallyl isocyanurate, 1 part of 1,4-benzoquinone, 3 parts of silicone, 1 part of long-chain alcohol polyester, 4,4'-
1.5 parts of thiobis (the 6- tert-butyl group -3- methylphenols), 1,3,5, three (3,5- di-t-butyls, 4- hydroxybenzyls) 2 parts of s-triazine,
Double (3,5- di-t-butyl -4- hydroxy benzenes propionyl) 2 parts of hydrazines.
Preparation method is：Weighed above-mentioned in material input high-speed mixer, high-speed stirred is sufficiently mixed 2min, then will
In this material mixed input banbury, in 120 DEG C of abundant banburying 10min, by this material to force the throwing of taper feeding manner
Enter melting extrusion in single screw extrusion machine, processing temperature be extrusion temperature at 95 DEG C~110 DEG C, through pelletizing, cooling, packaging, i.e.,
Low smoke halogen-free fire retardant polyolefin cable material must be chemically crosslinked.
By granular chemical cross-linking low smoke halogen-free fire retardant polyolefin cable material in the mill mixing that temperature setting is 110 DEG C
1min, test piece, performance test such as table 3 are compressed under 15min*200 DEG C of * 15MPa conditions of vulcanization.
Embodiment 3
Formula is as follows：
The quality % contents of acrylic acid ethyl ester monomer are the ethylene-ethylacrylate that 35% and DSC fusing points are less than 85 DEG C
70 parts of copolymer, DSC fusing points are less than 85 DEG C of 10 parts of ethylene-hexene co-polymers elastomers, maleic anhydride grafted ethene-acrylic acid first
30 parts of ester copolymer, 110 parts of magnesium hydroxide, 35 parts of miemite, 5 parts of CNT, the double (tert-butyl groups of 2,5- dimethyl -2,5-
Peroxide) 1.5 parts of -3- hexins, 2 parts of Triallyl isocyanurate, 0.1 part of tetramethyl-benzoquinone, 1 part of long-chain alcohol polyester, polyhydroxy
3 parts of magnesium stearate, 1 part of 4,4'- thiobis (the 6- tert-butyl group -3- methylphenols), four [β-(3 ', 5 '-di-t-butyl -4 '-hydroxyl
Phenyl) propionic acid] 1 part of pentaerythritol ester, double (3,5- di-t-butyl -4- hydroxy benzenes propionyl) 1 part of hydrazines.
Preparation method is：Weighed above-mentioned in material input high-speed mixer, high-speed stirred is sufficiently mixed 5min, then will
It is in 115 DEG C of abundant banburying 13min, this material is single through forcing taper feeding to put into this material mixed input banbury
Melting extrusion in screw extruder, processing temperature be extrusion temperature at 95 DEG C~110 DEG C, through pelletizing, cooling, packaging, producing
Learn cross-linking low smoke halogen-free fire retardant polyolefin cable material.
By granular chemical cross-linking low smoke halogen-free fire retardant polyolefin cable material in the mill mixing that temperature setting is 110 DEG C
1min, test piece, performance test such as table 3 are compressed under 15min*200 DEG C of * 15Mpa conditions of vulcanization.
Embodiment 4
Formula is as follows：
The quality % contents of Butyl Acrylate Monomer are the Ethylene-butyl acrylate that 30% and DSC fusing points are less than 85 DEG C
60 parts of copolymer, DSC fusing points are less than 85 DEG C of 20 parts of ethylene-butene copolymer elastomer, maleic anhydride grafting EP rubbers 15
Part, 75 parts of magnesium hydroxide, 50 parts of miemite, 8 parts of hypo-aluminum orthophosphate, double (the t-butyl peroxy) -3- hexins of 2,5- dimethyl -2,5-
3.5 parts, 1.5 parts of Triallyl isocyanurate, 0.8 part of 2- methyl -2- nitromethanes, 2 parts of silicone, 1 part of long-chain alcohol polyester,
Three 2 parts of (2,4- di-tert-butyl-phenyl) phosphite esters, 1,3,5, three (3,5- di-t-butyls, 4- hydroxybenzyls) 1 part of s-triazine, four
[β-(3 ', 5 '-di-t-butyl -4 '-hydroxy phenyl) propionic acid] 2.3 parts of pentaerythritol ester.
Preparation method is：Weighed above-mentioned in material input high-speed mixer, high-speed stirred is sufficiently mixed 4min, then will
It is in 118 DEG C of abundant banburying 14min, this material is single through forcing taper feeding to put into this material mixed input banbury
Melting extrusion in screw extruder, processing temperature, through pelletizing, cooling, packaging, produce the low cigarette of chemical crosslinking at 95 DEG C~110 DEG C
Phosphorus flame retardant etc..
By granular chemical cross-linking low smoke halogen-free fire retardant polyolefin cable material in the mill mixing that temperature setting is 110 DEG C
1min, test piece, performance test such as table 3. are compressed under 15min*200 DEG C of * 15MPa conditions of vulcanization
Embodiment 5
Formula is as follows：
The quality % contents of methacrylate monomer are the ethylene-methyl acrylate that 18% and DSC fusing points are less than 85 DEG C
70 parts of copolymer, DSC fusing points are less than 85 DEG C of 10 parts of ethylene-hexene co-polymers elastomer, maleic anhydride grafted ethene-acrylic acid
10 parts of methyl terpolymer, 80 parts of magnesium hydroxide, 60 parts of miemite, 5 parts of Firebrake ZB, the double (tert-butyl group mistakes of 2,5- dimethyl -2,5-
Oxygen) 2.8 parts of -3- hexins, 0.5 part of Triallyl isocyanurate, 0.5 part of phenyl-N- tert-butylnitrones, 1 part of silicone, long-chain alcohol
2.5 parts of polyester, 1 part of 4,4'- thiobis (the 6- tert-butyl group -3- methylphenols), four [β-(3 ', 5 '-di-t-butyl -4 '-hydroxy benzenes
Base) propionic acid] 1 part of pentaerythritol ester, 1,3,5, three (3,5- di-t-butyls, 4- hydroxybenzyls) 2.8 parts of s-triazine.
Preparation method is：Weighed above-mentioned in material input high-speed mixer, high-speed stirred is sufficiently mixed 3min, then will
It is in 114 DEG C of abundant banburying 11min, this material is single through forcing taper feeding to put into this material mixed input banbury
Melting extrusion in screw extruder, processing temperature be extrusion temperature at 95 DEG C~110 DEG C, through pelletizing, cooling, packaging, producing
Learn cross-linking low smoke halogen-free fire retardant polyolefin cable material.
By granular chemical cross-linking low smoke halogen-free fire retardant polyolefin cable material in the mill mixing that temperature setting is 110 DEG C
1min, test piece, performance test such as table 3. are compressed under 15min*200 DEG C of * 15MPa conditions of vulcanization
Table 3 is the test result for the chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material that embodiment 2~5 obtains
Claims (10)
1. one kind chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material, it is characterised in that it is matched in parts by weight by following
Raw material composition：
80 parts of binder resin；
Compatilizer 10-30 parts；
Inorganic combustion inhibitor 100-145 parts；
Fire retarding synergist 3-10 parts；
Crosslinking agent 1.5-3.5 parts；
Crosslinking sensitizer 1-2 parts；
Stabilizer 0.1-1 parts；
Lubricant 2-4 parts；
Antioxidant 2-5.5 parts；
Described binder resin is made up of the following raw material matched in parts by weight：Ethylene copolymer 40-70 parts and polyolefin bullet
Property body 10-40 parts.
2. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described second
Alkene copolymer be ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer or
Ethylene-butyl acrylate copolymer；The quality % contents of comonomer melt equal to or more than 18%, DSC in the ethylene copolymer
Point is less than 85 DEG C.
3. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described is poly-
Olefin elastomer is ethylene-octene copolymer of the DSC fusing points less than 85 DEG C, ethylene-butene copolymer or polyethylene-hexene copolymerization
Thing.
4. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described phase
Appearance agent is maleic anhydride grafted ethene-butylene copolymer, maleic anhydride grafted ethene-octene copolymer, maleic anhydride grafting second
Alkene-methyl acrylate copolymer, maleic anhydride grafted ethene-ethyl acrylate copolymer or maleic anhydride grafting EP rubbers.
5. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described nothing
Machine fire retardant is the mixture of magnesium hydroxide and miemite；Described fire retarding synergist is that hypo-aluminum orthophosphate, Firebrake ZB or carbon are received
Mitron.
6. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described friendship
It is 2,5- dimethyl -2,5- double to join agent（T-butyl peroxy）- 3- hexins；Described crosslinking sensitizer is triallyl isocyanuric acid
Ester.
7. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described is steady
It is 2,2- diphenyl -1- trinitrophenyl-hydrazines, 1,4-benzoquinone, tetramethyl-benzoquinone, 2- methyl -2- nitromethanes or phenyl-N- to determine agent
Tert-butylnitrone.
8. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described profit
Lubrication prescription is one or more of combinations in multi-hydroxy stearic acid magnesium, silicone, long-chain alcohol polyester.
9. chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material according to claim 1, it is characterised in that described is anti-
Oxygen agent be four [β-（3 ', 5 '-di-t-butyl -4 '-hydroxy phenyl）Propionic acid] pentaerythritol ester, three（2,4- di-tert-butyl-phenyls）It is sub-
It is phosphate, double（3,5- di-t-butyl -4- hydroxy benzenes propionyl）Hydrazine, 4,4'- thiobis (the 6- tert-butyl group -3- methylphenols）And 1,
3,5, three（3,5- di-t-butyls, 4- hydroxybenzyls）Two or three of combination in s-triazine.
10. a kind of preparation method of chemical crosslinking low smoke halogen-free fire retardant polyolefin cable material as claimed in claim 1, its feature
Be its be first by 100~145 parts of 10~30 parts of 80 parts of binder resin, compatilizer, inorganic combustion inhibitor weighing in parts by weight,
3~10 parts of fire retarding synergist, 1.5~3.5 parts of crosslinking agent, 1.0~2.0 parts of crosslinking sensitizer, 0.1~1 part of stabilizer, profit
In 2~4 parts of lubrication prescription and 2.0~5.5 parts of input high-speed mixers of antioxidant, 2-5min is stirred under normal temperature, then blowing enters banburying
In machine, 8~15min of banburying at a temperature of 110 DEG C~120 DEG C, then by material with force taper feeding manner feed single screw rod
Extruder, the extrusion temperature of single screw extrusion machine are 95-110 DEG C, pelletizing, cooling, bag successively after single screw extrusion machine is extruded
Dress, obtain being chemically crosslinked low smoke halogen-free fire retardant polyolefin cable material, wherein：Described binder resin is matched somebody with somebody in parts by weight by following
The raw material composition of ratio：Ethylene copolymer 40-70 parts and polyolefin elastomer 10-40 parts.
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