CN103265752A - Halogen-free flame retardant thermoplastic polyolefin cable material - Google Patents
Halogen-free flame retardant thermoplastic polyolefin cable material Download PDFInfo
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Abstract
The invention discloses a halogen-free flame retardant thermoplastic polyolefin cable material. The cable material consists of the following components in parts by weight: 0-40 parts of polyethylene resin, 20-80 parts of ethylene copolymer, 20-40 parts of compound flame retardant, 5-20 parts of compatilizer, 4-50 parts of flame retardant synergist, 1-4 parts of coupling agent, 0.5-4 parts of antioxidant and 1-10 parts of processing aid. According to the halogen-free flame retardant thermoplastic polyolefin cable material disclosed by the invention, the flame retardant is formed by compounding a borate flame retardant and a phosphorus nitrogen flame retardant; by adding a small amount of compound flame retardant, the cable material obtains a good flame retardant effect and an excellent smoke suppression effect; and the cable material has low smoke density and low toxicity index.
Description
Technical field
The present invention relates to the electric wire plastics, relate in particular to the high cable material of polyolefin of the good thermoplasticity of a kind of low-smoke non-halogen flame-retardant.
Background technology
Traditional fire-resistant cable material mainly adopts PVC and adds the polyolefine of halogenated flame retardant, but Halogen CABLE MATERIALS (PVC itself is with regard to Halogen) can produce obnoxious flavour and many flue gases when burning, when presence of fire, these obnoxious flavoures and flue gas can threaten human beings'health and can cause the secondary injury to the electronic machine of precision etc., cause immeasurable losses.
European Union's dependent instructions such as RoHS instruction, WEEE instruction, REACH instruction and EuP instruction that release one after another in recent years, the electric wire product that the EuP command request enters European Union market must satisfy the Halogen requirement, the halogen-free environment-friendly flame-proof wire cable material is the direction of wire cable material development, and fireproofing cable material without halide is fire-retardant because of it, low cigarette, nontoxic, environmental protection obtain application more and more widely.And along with international environmental protection trend, fireproofing cable material without halide certainly will will replace the Halogen CABLE MATERIALS.
Some electric cable material with low smoke and halogen free mainly is that employing polyolefin substrate and inorganic fire-retarded filler are the compound system of main component now.Its inorganic combustion inhibitor mainly is aluminium hydroxide or magnesium hydroxide, but because aluminium hydroxide or magnesium hydroxide flame retardant efficient are low, make it reach flame retardant effect preferably, the addition of aluminium hydroxide or magnesium hydroxide is very big, addition is at least more than 50%, sometimes even reach 75%, this kind CABLE MATERIALS still can't reach the requirement of UL1581 VW-1 flame retardant rating when being applied on the thin electric wire of wall.And owing to need addition big, cause physical and mechanical properties, electric property, the processing characteristics of CABLE MATERIALS to worsen.
Now, phosphor nitrogen combustion inhibitor is also many as the research of cable-flame retardant agent, representational phosphor nitrogen combustion inhibitor has: organic Hypophosporous Acid, 50 salt, inorganic Hypophosporous Acid, 50 salt, polyphosphoric acid salt, nitrogen flame retardant, phosphoric acid ester fire retardant and their compound flame retardant etc., the use of these fire retardants, flame retarding efficiency is high more a lot of than aluminium hydroxide or flame retardant of magnesium hydroxide, the addition of fire retardant just can reach UL1581 VW-1 flame retardant rating between 30 ~ 35%, but the cable amount of being fuming of adding this fire retardant is big, be unfavorable for environmental protection, and the production cost height.
Summary of the invention
The present invention proposes a kind of halogen-free combustion-proof thermoplastic cable material of polyolefin, uses a spot of compound flame retardant just to make CABLE MATERIALS reach good flame resistance, effect that the amount of being fuming is low, satisfies environmental requirement.
In order to solve the prior art problem, the present invention is achieved by the following technical solutions.
A kind of halogen-free combustion-proof thermoplastic cable material of polyolefin, this CABLE MATERIALS is made up of polyvinyl resin, ethylene copolymer, compound flame retardant, compatilizer, retardant synergist, coupling agent, oxidation inhibitor and processing aid, and the parts by weight of this each component of CABLE MATERIALS are 1 ~ 10 part of 0.5 ~ 4 part of 0 ~ 40 part of polyvinyl resin, 20 ~ 80 parts of ethylene copolymers, 20 ~ 40 parts of compound flame retardants, 5 ~ 20 parts of compatilizers, 4 ~ 50 parts of retardant synergists, 1 ~ 4 part of coupling agent, oxidation inhibitor and processing aid.
The density of described polyvinyl resin is at 0.860 ~ 0.960g/ cm
3Between, melt index between 0.1 ~ 50g/min, any in preferred high density polyethylene(HDPE), medium-density polyethylene, Low Density Polyethylene, linear low density polyethylene, very low density polyethylene, ultra-low density polyethylene and the POE or several combination.The melt index full name is the liquation fluid index, is that a kind of plastic material of representing adds the numerical value of the flowability in man-hour.
The melt index of described ethylene copolymer between 0.1 ~ 50g/min, any in optimal ethylene vinyl acetate, ethylene ethyl acrylate, ethylene methyl acrylate, the ethylene butyl acrylate or several combination.
Described compound flame retardant is by the borate family fire retardant and phosphor nitrogen combustion inhibitor is composite forms, the parts by weight proportioning of borate family fire retardant and phosphor nitrogen combustion inhibitor is 1.5 ~ 6:1, the borate family fire retardant is 3 ~ 15 μ m through silane surface treatment and the median size of 1% consumption, and the median size of phosphor nitrogen combustion inhibitor is 5 ~ 25 μ m.
Described borate family fire retardant is melamine borate salt, the thanomin borate, the quadrol borate, the piperazine borate, the pyridine borate, the piperidines borate, the aminopyridine borate, the aminooimidazole borate, the melamine phosphate borate, phosphoric acid quadrol borate, the piperazine phosphate borate, the polyphosphoric acid melamine borate, polyphosphoric acid quadrol borate, the TERTIARY BUTYL AMINE borate, the aniline borate, the hexahydroaniline borate, the diethylamine borate, the triethylamine borate, the hexanediamine borate, phosphoric acid hexanediamine borate, N, N-dimethyl-p-phenylenediamine borate, one or more combination in morpholine borate and 2, the 4-xylidine borate; Described phosphor nitrogen combustion inhibitor is trimeric cyanamide, polyphosphoric acid melamine, melamine cyanurate, tetra-sodium two trimeric cyanamides, the ortho-phosphoric acid trimeric cyanamide, ammonium polyphosphate, CN-329, the phosphoric acid ester melamine salt, three (1-oxos-1-phospha-2,6,7-trioxa-l-phosphabicyclo ［ 2,2,2 ］ phosphoric acid ester octane-4-methylene radical), two neopentyl glycol mphenylenediamine biphosphonates, encircle three phosphonitrile hybrid polyurethanes, three-(neopentyl glycol phosphoric acid ester-P-methylene radical) amine, the starch-phosphate melamine salt, in sorbitol phosphonate of melamine and the neopentyl glycol phosphoric acid ester melamine salt any or several combination.
Described compatilizer is any or several combination in maleic anhydride grafted polyethylene, maleic anhydride grafted ethene vinyl acetate, maleic anhydride grafted ethene octene copolymer and the ethylene-acrylate-maleic anhydride terpolymer.
Described retardant synergist is any or several combination in silicon-dioxide, zinc borate, antimonous oxide, calcium carbonate, talcum powder, polygorskite, sepiolite, wollastonite, polynite, aluminum oxide, magnesium oxide, zinc oxide, titanium oxide, frit, kaolin, melamine cyanurate, ammonium polyphosphate and the organosilicon polymer.
Described coupling agent is any in silane coupling agent, titanate coupling agent and the stearic acid.
Described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, three [2, the 4-di-tert-butyl-phenyl] the two octadecyl esters of phosphorous acid ester, thio-2 acid, Tyox B, 4,4 '-two (α, α-Er Jiajibianji) pentanoic, 4, any in 4'-thiobis (the 6-tertiary butyl-3-methylphenol) and the zinc salt of 2 mercaptobenzimidazole or several combination.
Described processing aid is any or several combination in Zinic stearas, calcium stearate, Magnesium Stearate, polyethylene wax, ethylene bis stearamide, silicone oil and the silicone.
Halogen-free combustion-proof thermoplastic cable material of polyolefin of the present invention adopts this area ordinary method to prepare, and comprises the steps:
(1) the parts by weight proportioning by each component of compound flame retardant is the borate family fire retardant: phosphor nitrogen combustion inhibitor=1.5 ~ 6:1 mixes, and obtains compound flame retardant after mixing, and wherein the borate family fire retardant is through 1% consumption silane surface treatment.
(2) take by weighing starting material by above-mentioned CABLE MATERIALS composition of raw materials, starting material are dropped in the mixing tank mix, carry out mixingly again through twin screw extruder or Banbury mixer, through the single screw extrusion machine extruding pelletization, be reprocessed into electric wire after the granulation.Wherein single screw extrusion machine is common single thread list screw rod syllogic forcing machine, and screw rod L/D is between 18 ~ 25, and compression ratio is between 1.1 ~ 2.5:1, and temperature Control of Single Screw Extruder is between 135 ~ 155 ℃.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) fire retardant that uses of the present invention is as the borate family fire retardant and phosphor nitrogen combustion inhibitor is composite forms, adding a spot of compound flame retardant just makes CABLE MATERIALS have good flame-retardant effect and good smoke suppressing effect, compound flame retardant of the present invention can replace the use of magnesium hydroxide, the fire retardant addition reduces greatly, and the smoke density of CABLE MATERIALS is low, poison exponent is low.
(2) halogen-free combustion-proof thermoplastic cable material of polyolefin of the present invention has excellent physical and mechanical performance, electric property and processing characteristics, reduced the addition of fire retardant in the preparation process, make and handling ease reduced the requirement of production unit, reduced production cost.
(3) the present invention has improved the stability of fire retardant by the borate family fire retardant is carried out the problem that the silane surface treatment solves the conventional flame retardant facile hydrolysis.Related component all is ripe conventional material, is convenient to large-scale promotion and uses.
Embodiment
A kind of halogen-free combustion-proof thermoplastic cable material of polyolefin of the present invention, this CABLE MATERIALS is made up of polyvinyl resin, ethylene copolymer, compound flame retardant, compatilizer, retardant synergist, coupling agent, oxidation inhibitor and processing aid, and the parts by weight of this each component of CABLE MATERIALS are 1 ~ 10 part of 0.5 ~ 4 part of 0 ~ 40 part of polyvinyl resin, 20 ~ 80 parts of ethylene copolymers, 20 ~ 40 parts of compound flame retardants, 5 ~ 20 parts of compatilizers, 4 ~ 50 parts of retardant synergists, 1 ~ 4 part of coupling agent, oxidation inhibitor and processing aid.
The density of described polyvinyl resin is at 0.860 ~ 0.960g/ cm
3Between, melt index between 0.1 ~ 50g/min, any in preferred high density polyethylene(HDPE), medium-density polyethylene, Low Density Polyethylene, linear low density polyethylene, very low density polyethylene, ultra-low density polyethylene and the POE or several combination.High density polyethylene(HDPE) is that average per 1000 carbon atoms only contain several side chains in the main chain, and density is 0.946 ~ 0.976g/cm
3Polyethylene, abbreviate HDPE as.Low Density Polyethylene is that average per 1000 carbon atoms have about 20 ~ 30 ethyls, butyl or other side chains in the main chain, and density is 0.910 ~ 0.925g/cm
3Polyethylene, abbreviate LDPE as.The polyethylene of side chain number between high-density and Low Density Polyethylene on the medium-density polyethylene main chain abbreviates MDPE as.Linear low density polyethylene is ethene with a small amount of high alpha-olefin (as butene-1, hexene-1, octene-1, tetramethyl-amylene-1 etc.) under catalyst action, and through a kind of multipolymer that high pressure or low-pressure polymerization form, density is in 0.915～0.9 40 g/cm
3Between.Very low density polyethylene is to be formed by ethene and a-olefin-copolymerization, and density is 0.880 ~ 0.910g/cm
3, abbreviate VLDPE as.Ultra-low density polyethylene is formed by ethene and second-olefin-copolymerization, do not contain the long-chain branch that Low Density Polyethylene has in the molecular structure, but short-chain branch is more, and density only is 0.88 ~ 0.91g/cm
3, abbreviate ULDPE as.POE with ethene, hot rare be raw material, the new type polyolefin elastomer material that adopts in-situ polymerization technology and constrained geometry catalysis technique to make, its commodity are called Engage.
The melt index of described ethylene copolymer between 0.1 ~ 50g/min, any in optimal ethylene vinyl acetate, ethylene ethyl acrylate, ethylene methyl acrylate, the ethylene butyl acrylate or several combination.The melt index full name is the liquation fluid index, is that a kind of plastic material of representing adds the numerical value of the flowability in man-hour.
Described compound flame retardant is by the borate family fire retardant and phosphor nitrogen combustion inhibitor is composite forms, the parts by weight proportioning of borate family fire retardant and phosphor nitrogen combustion inhibitor is 1.5 ~ 6:1, the borate family fire retardant is 3 ~ 15 μ m through silane surface treatment and the median size of 1% consumption, and the median size of phosphor nitrogen combustion inhibitor is 5 ~ 25 μ m.It is known technology that the present invention carries out the silane surface treatment to the borate family fire retardant, its concrete treatment process has dry process, slurry processing, spraying processing, direct integral blend and mother material integral blend etc., and the silane of 1% consumption refers to that dosage of silane coupling agent is 1% of borate family fire retardant weight.
Described borate family fire retardant is melamine borate salt, the thanomin borate, the quadrol borate, the piperazine borate, the pyridine borate, the piperidines borate, the aminopyridine borate, the aminooimidazole borate, the melamine phosphate borate, phosphoric acid quadrol borate, the piperazine phosphate borate, the polyphosphoric acid melamine borate, polyphosphoric acid quadrol borate, the TERTIARY BUTYL AMINE borate, the aniline borate, the hexahydroaniline borate, the diethylamine borate, the triethylamine borate, the hexanediamine borate, phosphoric acid hexanediamine borate, N, N-dimethyl-p-phenylenediamine borate, one or more combination in morpholine borate and 2, the 4-xylidine borate; Described phosphor nitrogen combustion inhibitor is trimeric cyanamide, polyphosphoric acid melamine, melamine cyanurate, tetra-sodium two trimeric cyanamides, the ortho-phosphoric acid trimeric cyanamide, ammonium polyphosphate, CN-329, the phosphoric acid ester melamine salt, three (1-oxos-1-phospha-2,6,7-trioxa-l-phosphabicyclo ［ 2,2,2 ］ phosphoric acid ester octane-4-methylene radical), two neopentyl glycol mphenylenediamine biphosphonates, encircle three phosphonitrile hybrid polyurethanes, three-(neopentyl glycol phosphoric acid ester-P-methylene radical) amine, the starch-phosphate melamine salt, in sorbitol phosphonate of melamine and the neopentyl glycol phosphoric acid ester melamine salt any or several combination.
Described compatilizer is any or several combination in maleic anhydride grafted polyethylene, maleic anhydride grafted ethene vinyl acetate, maleic anhydride grafted ethene octene copolymer and the ethylene-acrylate-maleic anhydride terpolymer.
Described retardant synergist is any or several combination in silicon-dioxide, zinc borate, antimonous oxide, calcium carbonate, talcum powder, polygorskite, sepiolite, wollastonite, polynite, aluminum oxide, magnesium oxide, zinc oxide, titanium oxide, frit, kaolin, melamine cyanurate, ammonium polyphosphate and the organosilicon polymer.
Described coupling agent is any in silane coupling agent, titanate coupling agent and the stearic acid.
Described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, three [2, the 4-di-tert-butyl-phenyl] the two octadecyl esters of phosphorous acid ester, thio-2 acid, Tyox B, 4,4 '-two (α, α-Er Jiajibianji) pentanoic, 4, any in 4'-thiobis (the 6-tertiary butyl-3-methylphenol) and the zinc salt of 2 mercaptobenzimidazole or several combination.
Described processing aid is any or several combination in Zinic stearas, calcium stearate, Magnesium Stearate, polyethylene wax, ethylene bis stearamide, silicone oil and the silicone.
Halogen-free combustion-proof thermoplastic cable material of polyolefin of the present invention adopts this area ordinary method to prepare, and comprises the steps:
(1) the parts by weight proportioning by each component of compound flame retardant is the borate family fire retardant: phosphor nitrogen combustion inhibitor=1.5 ~ 6:1 mixes, and obtains compound flame retardant after mixing.Wherein the borate family fire retardant is 3 ~ 15 μ m through silane surface treatment and the median size of 1% consumption, and the median size of phosphor nitrogen combustion inhibitor is 5 ~ 25 μ m.
(2) take by weighing starting material by above-mentioned CABLE MATERIALS composition of raw materials, starting material are dropped in the mixing tank mix, carry out mixingly again through twin screw extruder or Banbury mixer, through the single screw extrusion machine extruding pelletization, be reprocessed into electric wire after the granulation.Wherein single screw extrusion machine is common single thread list screw rod syllogic forcing machine, and screw rod L/D is between 18 ~ 25, and compression ratio is between 1.1 ~ 2.5:1, and temperature Control of Single Screw Extruder is between 135 ~ 155 ℃.
Understanding for those skilled in the art is further described the present invention below in conjunction with specific embodiment.
Embodiment 1
Compound flame retardant is mixed for 40 parts by piperazine phosphate borate 60 and polyphosphoric acid melamine in the present embodiment, and wherein the piperazine phosphate borate is 3 μ m through silane surface treatment and the median size of 1% consumption, and the median size of polyphosphoric acid melamine is 5 μ m.
The raw material of present embodiment halogen-free combustion-proof thermoplastic cable material of polyolefin is formed as shown in table 1.
| Material name | Parts by weight | Material name | Parts by weight |
| Linear low density polyethylene | 0 | Zinc borate | 4 |
| Ethylene vinyl acetate | 20 | Silane coupling agent | 1 |
| Compound flame retardant | 20 | Tyox B | 0.5 |
| Maleic anhydride grafted polyethylene | 5 | Zinic stearas | 1 |
Table 1
The preparation method of present embodiment is,
(1) prepare compound flame retardant earlier, compound flame retardant is mixed for 40 parts by piperazine phosphate borate 60 and polyphosphoric acid melamine.
(2) take by weighing various raw materials by the parts by weight in the table 1.
(3) starting material that will weigh up drop in the mixing tank and mix, and carry out mixingly again through twin screw extruder or Banbury mixer, through the single screw extrusion machine extruding pelletization, are reprocessed into electric wire after the granulation.
Wherein the single screw extrusion machine in the step (3) is common single thread list screw rod syllogic forcing machine, and screw rod L/D is between 18 ~ 25, and compression ratio is between 1.1 ~ 2.5:1, and temperature Control of Single Screw Extruder is between 135 ~ 155 ℃.
Embodiment 2
Compound flame retardant is mixed for 25 parts by melamine borate salt 75 and phosphoric acid ester melamine salt in the present embodiment, and wherein the piperazine phosphate borate is 7 μ m through silane surface treatment and the median size of 1% consumption, and the median size of polyphosphoric acid melamine is 15 μ m.
The raw material of present embodiment halogen-free combustion-proof thermoplastic cable material of polyolefin is formed as shown in table 2.
| Material name | Parts by weight | Material name | Parts by weight |
| High density polyethylene(HDPE) | 20 | Antimonous oxide | 20 |
| Ethylene methyl acrylate | 50 | Titanate coupling agent | 2 |
| Compound flame retardant | 30 | The two octadecyl esters of thio-2 acid | 2 |
| The maleic anhydride grafted ethene vinyl acetate | 10 | Ethylene bis stearamide | 5 |
Table 2
The preparation method of present embodiment halogen-free combustion-proof thermoplastic cable material of polyolefin is identical with the preparation method of embodiment 1.
Embodiment 3
Compound flame retardant is by N in the present embodiment, N-dimethyl-p-phenylenediamine borate 85 and neopentyl glycol phosphoric acid ester melamine salt mix for 15 parts, wherein the piperazine phosphate borate is 15 μ m through silane surface treatment and the median size of 1% consumption, and the median size of polyphosphoric acid melamine is 25 μ m.
The raw material of present embodiment halogen-free combustion-proof thermoplastic cable material of polyolefin is formed as shown in table 3.
Table 3
The preparation method of present embodiment halogen-free combustion-proof thermoplastic cable material of polyolefin is identical with the preparation method of embodiment 1.
Comparative Examples 4
This Comparative Examples substitutes compound flame retardant for adopting magnesium hydroxide to do fire retardant on the basis of embodiment 2, and the parts by weight that magnesium hydroxide adds are 100 parts, and other feed composition of this CABLE MATERIALS are identical with the feed composition of embodiment 2.
Comparative Examples 5
This Comparative Examples replaces compound flame retardant for adopting organic hypophosphite to do fire retardant on the basis of embodiment 2, and the parts by weight that organic hypophosphite adds are 25 parts, and other feed composition of this CABLE MATERIALS are identical with the feed composition of embodiment 2.
The related component that the present invention uses all is ripe conventional material, is convenient to large-scale promotion and uses.
The cable that obtains in above-described embodiment and the Comparative Examples is carried out Performance Detection, and its each results of property is as shown in table 4.
Remarks: Y represents to pass through, and N represents failure.
Table 4
From the test result of above-described embodiment and Comparative Examples as seen, product of the present invention has superior flame retardant properties, adds a spot of compound flame retardant and just makes single vertical combustion can pass through UL1581 VW-1 combustion testing.The smoke density of product of the present invention, poison exponent and use hydrogen-oxygen turn approaching of magnesium flame retardant products into, and than using hypophosphite to do the low many of flame retardant products, and product of the present invention has good physical and mechanical properties, electric property and processing characteristics.
(1) fire retardant that uses of the present invention is as the borate family fire retardant and phosphor nitrogen combustion inhibitor is composite forms, adding a spot of compound flame retardant just makes CABLE MATERIALS have good flame-retardant effect and good smoke suppressing effect, compound flame retardant of the present invention can replace the use of magnesium hydroxide, the fire retardant addition reduces greatly, and the smoke density of CABLE MATERIALS is low, poison exponent is low.
(2) halogen-free combustion-proof thermoplastic cable material of polyolefin of the present invention has excellent physical and mechanical performance, electric property and processing characteristics, reduced the addition of fire retardant in the preparation process, make and handling ease reduced the requirement of production unit, reduced production cost.
(3) the present invention has improved the stability of fire retardant by the borate family fire retardant is carried out the problem that the silane surface treatment solves the conventional flame retardant facile hydrolysis.Related component all is ripe conventional material, is convenient to large-scale promotion and uses.
The content of mentioning in above-described embodiment is not to be limitation of the invention, and under the prerequisite that does not break away from inventive concept of the present invention, any apparent replacement is all within protection scope of the present invention.
Claims (10)
1. halogen-free combustion-proof thermoplastic cable material of polyolefin, this CABLE MATERIALS is made up of polyvinyl resin, ethylene copolymer, compound flame retardant, compatilizer, retardant synergist, coupling agent, oxidation inhibitor and processing aid, and the parts by weight of this each component of CABLE MATERIALS are 1 ~ 10 part of 0.5 ~ 4 part of 0 ~ 40 part of polyvinyl resin, 20 ~ 80 parts of ethylene copolymers, 20 ~ 40 parts of compound flame retardants, 5 ~ 20 parts of compatilizers, 4 ~ 50 parts of retardant synergists, 1 ~ 4 part of coupling agent, oxidation inhibitor and processing aid.
2. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 1, it is characterized in that: the density of described polyvinyl resin is at 0.860 ~ 0.960g/cm
3Between, melt index is between 0.1 ~ 50g/min.
3. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 2, it is characterized in that: the melt index of described ethylene copolymer is between 0.1 ~ 50g/min.
4. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 3, it is characterized in that: described compound flame retardant is by the borate family fire retardant and phosphor nitrogen combustion inhibitor is composite forms, the parts by weight proportioning of borate family fire retardant and phosphor nitrogen combustion inhibitor is 1.5 ~ 6:1, the borate family fire retardant is 3 ~ 15 μ m through silane surface treatment and its median size of 1% consumption, and the median size of phosphor nitrogen combustion inhibitor is 5 ~ 25 μ m.
5. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 4, it is characterized in that: described borate family fire retardant is melamine borate salt, the thanomin borate, the quadrol borate, the piperazine borate, the pyridine borate, the piperidines borate, the aminopyridine borate, the aminooimidazole borate, the melamine phosphate borate, phosphoric acid quadrol borate, the piperazine phosphate borate, the polyphosphoric acid melamine borate, polyphosphoric acid quadrol borate, the TERTIARY BUTYL AMINE borate, the aniline borate, the hexahydroaniline borate, the diethylamine borate, the triethylamine borate, the hexanediamine borate, phosphoric acid hexanediamine borate, N, N-dimethyl-p-phenylenediamine borate, one or more combination in morpholine borate and 2, the 4-xylidine borate; Described phosphor nitrogen combustion inhibitor is trimeric cyanamide, polyphosphoric acid melamine, melamine cyanurate, tetra-sodium two trimeric cyanamides, the ortho-phosphoric acid trimeric cyanamide, ammonium polyphosphate, CN-329, the phosphoric acid ester melamine salt, three (1-oxos-1-phospha-2,6,7-trioxa-l-phosphabicyclo ［ 2,2,2 ］ phosphoric acid ester octane-4-methylene radical), two neopentyl glycol mphenylenediamine biphosphonates, encircle three phosphonitrile hybrid polyurethanes, three-(neopentyl glycol phosphoric acid ester-P-methylene radical) amine, the starch-phosphate melamine salt, in sorbitol phosphonate of melamine and the neopentyl glycol phosphoric acid ester melamine salt any or several combination.
6. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 5 is characterized in that: described compatilizer is any or several combination in maleic anhydride grafted polyethylene, maleic anhydride grafted ethene vinyl acetate, maleic anhydride grafted ethene octene copolymer and the ethylene-acrylate-maleic anhydride terpolymer.
7. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 5 is characterized in that: described retardant synergist is any or several combination in silicon-dioxide, zinc borate, antimonous oxide, calcium carbonate, talcum powder, polygorskite, sepiolite, wollastonite, polynite, aluminum oxide, magnesium oxide, zinc oxide, titanium oxide, frit, kaolin, melamine cyanurate, ammonium polyphosphate and the organosilicon polymer.
8. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 5, it is characterized in that: described coupling agent is any in silane coupling agent, titanate coupling agent and the stearic acid.
9. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 5, it is characterized in that: described oxidation inhibitor is four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, three [2, the 4-di-tert-butyl-phenyl] the two octadecyl esters of phosphorous acid ester, thio-2 acid, Tyox B, 4,4 '-two (α, α-Er Jiajibianji) pentanoic, 4, any in 4'-thiobis (the 6-tertiary butyl-3-methylphenol) and the zinc salt of 2 mercaptobenzimidazole or several combination.
10. halogen-free combustion-proof thermoplastic cable material of polyolefin according to claim 5 is characterized in that: described processing aid is any or several combination in Zinic stearas, calcium stearate, Magnesium Stearate, polyethylene wax, ethylene bis stearamide, silicone oil and the silicone.
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