CN101875735B - Halogen-free flame-retardant cable sheath material and preparation process thereof - Google Patents
Halogen-free flame-retardant cable sheath material and preparation process thereof Download PDFInfo
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- CN101875735B CN101875735B CN2009100501659A CN200910050165A CN101875735B CN 101875735 B CN101875735 B CN 101875735B CN 2009100501659 A CN2009100501659 A CN 2009100501659A CN 200910050165 A CN200910050165 A CN 200910050165A CN 101875735 B CN101875735 B CN 101875735B
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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Abstract
The invention discloses a formula of a halogen-free flame-retardant cable sheath material and a preparation process thereof. The formula of the halogen-free flame-retardant cable sheath material uses polyolefin as a substrate, Mg(OH)2 or/and Al(OH)3 as a flame retardant and a phosphazene compound as a synergetic flame retardant to overcome the defect of the adoption of red phosphorus serving as the synergetic flame retardant and particularly the limitation that only black or purple-red cable sheath materials can be prepared in the prior art, and realize the preparation of the cable sheath material with various colors. A product prepared according to the formula of the invention has the advantages of limited oxygen index more than or equal to 31 percent, breaking strength more than or equal to 12MPa, elongation at rupture more than or equal to 180 percent, Vicat softening temperature more than or equal to 65 DEG C, melt flow rate (MFR) more than or equal to 1.5g/10min, high flame-retardant effect, good processing performance and comprehensive mechanical property, high heat-resisting temperature and wide application prospect.
Description
Technical field
The present invention relates to a kind of halogen-free flame-proof cable sheath material and preparation technology thereof, and specifically, relating to a kind of is matrix, Mg (OH) with the polyolefine
2Or/and Al (OH)
3For fire retardant, phosphazene compound is the prescription and the preparation technology thereof of the halogen-free flame-proof cable sheath material of synergistic flame retardant.
Background technology
Along with people to the reinforcement of environmental consciousness and the appearance of environmental regulation, the macromolecular material Non-halogen Flame Retardant Technology with Halogen, low cigarette characteristic will progressively be substituted with the halogen flame-retarded technology.For a long time, the consumption of polyvinyl chloride (PVC) has nearly accounted for 80% in the electric wire and cable material.Owing to contain harmful heavy metals such as lead, tin, barium in the PVC CABLE MATERIALS, and PVC can produce in combustion processes and have gas and violent dense smokes such as toxicity and corrosive hydrogenchloride, easily causes a large amount of loss of life and personal injury and the damage of precision instrument in fire.Therefore, developed countries such as Europe and Japan have formulated the new standard of cable in succession, particularly the strict use that limits halide-containings such as PVC in the RoHS instruction.
At present, the production of halogen-free flame-retardant cable mainly is by fill a large amount of inorganic combustion inhibitor Mg (OH) in polymkeric substance
2Or/and Al (OH)
3Prepare, but the existence of a large amount of mineral fillers will inevitably cause the severe exacerbation of composite materials property.In order to reduce the content of inorganic combustion inhibitor, guarantee the flame retardant properties that matrix material is high again simultaneously, adopt fire retarding synergist and inorganic combustion inhibitor to add in the matrix jointly usually.Though red phosphorus is a kind of the most frequently used synergistic flame retardant of hydroxide hydrate, red phosphorus very easily oxidation produces the phosphine gas of severe toxicity and the explosive defective of red phosphorus dust and the inherent red-purple of red phosphorus own and has limited the application that contains the red phosphorus CABLE MATERIALS.Therefore, people begin one's study and seek other nontoxic synergistic flame retardants and be used in the production of CABLE MATERIALS.A kind of employing ethylene-octene copolymer is disclosed in Chinese patent literature CN100465220, new LDPE (film grade), the mixture of ethene one vinyl acetate copolymer is as matrix resin, adopt magnesium hydroxide to do fire retardant, with expansible black lead and organo montmorillonite is the prescription of the halogen-free flame-proof cable sheath material of synergistic flame retardant, though this patent utilization expansible black lead and organo montmorillonite have substituted the synergistic fire retardation of red phosphorus, prepared cable jacket material has than more excellent mechanical property and flame retardant properties, but because the existence of expansible black lead, the prescription of this patent can only be used to prepare the balck cable sheath material, can't be applied to prepare the cable jacket material of other colors, its range of application has very big limitation.
Summary of the invention
The objective of the invention is to aim to provide a kind of prescription and preparation technology thereof of halogen-free flame-proof cable sheath material of the cable jacket material that can be applicable to prepare any color, to overcome the above-mentioned defective of existing in prior technology.
For achieving the above object, the technical solution used in the present invention is as follows:
Halogen-free flame-proof cable sheath material of the present invention, the weight percent that it is formed and each is formed is as follows:
Polyethylene 10%～30%
Ethylene-vinyl acetate copolymer 10%～30%
Fire retardant 30%～50%
Synergistic flame retardant 1%～10%
Compatilizer 6.5%～19.5%
Thermo-stabilizer 0.2%～2%
Processing aid 0.3%～1%
Above-mentioned composition proportioning sum is 100%;
Wherein: fire retardant is the mixture of magnesium hydroxide or aluminium hydroxide or both compositions; synergistic flame retardant is a phosphazene compound; compatilizer is the polar monomer graftomer; thermo-stabilizer is the mixture class of phenols, amine, phosphorous acid esters, half Hinered phenols, acryl functional group and monothioester, the mixture of one or more compositions in the calixarene kind thermo-stabilizer, and processing aid is the mixture of one or more compositions in low molecule ester class, metallic soap class, stearic acid complex ester class, the amides processing aid.
Described polyethylene preferred molecular weight is 20～50 linear low density polyethylene.
Described ethylene-vinyl acetate copolymer preferably contains the multipolymer that vinyl acetate is 20～30% weight percents.
The mixture of one or more compositions in the preferred phenoxy phosphazene of described phosphazene compound, three O-Phenylene Diamine basic rings, three phosphonitriles, six isopropoxy rings, three phosphonitriles.
Described polar monomer graftomer preferred polymers matrix is a polyethylene, polypropylene, ethene-α-ethylene-octene copolymer, the multipolymer of vinylbenzene and divinyl, ethene-styrene-propene terpolymer, ethylene-propylene-butadiene terpolymer, ethylene-acrylate copolymer, the mixture of one or more compositions in ethylene-acrylate-glycidyl methacrylate copolymer, polar monomer are maleic anhydride, fumaric acid, methylene-succinic acid, citraconic acid, citraconic anhydride, the vinyl Succinic anhydried, vinylformic acid, methacrylic acid, methyl acrylate, ethyl propenoate, methyl methacrylate, the mixture of one or more compositions in the glytidyl methacrylate.
The mixture of one or more compositions in the preferred dihydroxyphenyl propane of described phenols thermo-stabilizer, bisphenol-c, the 2,6 ditertiary butyl p cresol; In the preferred diphenyl-para-phenylene diamine of described amine thermo-stabilizer, diphenyl-para-phenylene diamine, 4-hydroxy-dodecanoic acid anilide, the 4-hydroxyl octadecanoic acid anilide-kind or the mixture of several compositions; The mixture of one or more compositions in the preferred trisnonyl phenyl phosphite of described phosphorous acid ester type thermal stabilizing agent, triphenyl phosphite, the hot diphenyl ester of phosphorous acid; Described half Hinered phenols thermo-stabilizer is preferred 1,3,5-trimethylammonium-2,4, and 6-three (3.5-di-tert-butyl-4-hydroxyl benzyl) benzene, Three methyl Benzene, 2,2 '-mixture of one or more compositions in the methylene bis (4-ethyl-6 tert.-butyl phenol); The preferred Tyox B of mixture type thermal stabilizing agent of described acryl functional group and monothioester; Described calixarene kind thermo-stabilizer preferably to the tertiary butyl 4 calixarene, to the tertiary butyl 6 calixarene, to the mixture of one or more compositions in the tertiary butyl 8 calixarene.
The mixture of one or more compositions in the preferred butyl stearate of described low molecule ester class processing aid, glyceryl monostearate, the Tristearoylglycerol; The mixture of one or more compositions in the preferred calcium stearate of described metallic soap class processing aid, Zinic stearas, Magnesium Stearate, the lead stearate; The mixture of one or more compositions in the preferred Tripolyglycerol monostearates of described stearic acid complex ester class processing aid, Polyglycerine monostearate; The mixture of one or more compositions in the preferred amine hydroxybenzene of described amides processing aid, stearylamide, the ethylene bis stearamide.
The preparation technology of halogen-free flame-proof cable sheath material of the present invention, its concrete operations are as follows:
Be (40～50) by adding length-to-diameter ratio after the proportioning weighing at first: in 1 the twin screw extruder, fire retardant is added wherein by the side spout from twin screw extruder after the proportioning weighing with polyethylene, ethylene-vinyl acetate copolymer, synergistic flame retardant, compatilizer, thermo-stabilizer and processing aid; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing get final product.
Compared with prior art, halogen-free flame-proof cable sheath material prescription of the present invention is to be matrix, Mg (OH) with the polyolefine
2Or/and Al (OH)
3For fire retardant, phosphazene compound are synergistic flame retardant, because of having phosphorus and two kinds of elements of nitrogen in the synergistic flame retardant-phosphazene compound molecular structure that is adopted simultaneously, the derivative kind is abundant, and most of phosphazene compound has and has no side effect, thermostability is strong, the not characteristics of facile hydrolysis, so prescription of the present invention have avoided employing red phosphorus as the existing defect problem of synergistic flame retardant; Especially the used synergistic flame retardant-phosphazene compound of the present invention is a white, is fit to the versicolor cable jacket material of preparation, has avoided prior art can only prepare the limitation of black or mauve cable jacket material; By the present invention fill a prescription limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, the melt flow rate (MFR) (MFR) 〉=1.5g/10min of prepared product, have excellent fire retardant effect, good processing properties and comprehensive mechanical property and higher heat resisting temperature, can be used as subway, Highrise buildings, market, theater, power house, chemical plant, city square and other to the cable jacket material of the demanding occasion of cable low smoke and zero halogen, have broad application prospects.
Embodiment
Is doing further in detail of how realizing, explanation clearly and completely below in conjunction with specific embodiment to the present invention, and listed embodiment only gives further instruction to the present invention, and is not thereby limiting the invention.Among the embodiment:
The polyethylene preferred molecular weight is 20～500,000 linear low density polyethylene;
Ethylene-vinyl acetate copolymer preferably contains the multipolymer that vinyl acetate is 20～30% weight percents;
Fire retardant is the mixture of magnesium hydroxide or aluminium hydroxide or both compositions;
Synergistic flame retardant is a phosphazene compound, the mixture of one or more compositions in preferred phenoxy phosphazene, three O-Phenylene Diamine basic rings, three phosphonitriles, six isopropoxy rings, three phosphonitriles;
Compatilizer is the polar monomer graftomer, the preferred polymers matrix is a polyethylene, polypropylene, ethene-α-ethylene-octene copolymer, the multipolymer of vinylbenzene and divinyl, ethene-styrene-propene terpolymer, ethylene-propylene-butadiene terpolymer, ethylene-acrylate copolymer, the mixture of one or more compositions in ethylene-acrylate-glycidyl methacrylate copolymer, polar monomer are maleic anhydride, fumaric acid, methylene-succinic acid, citraconic acid, citraconic anhydride, the vinyl Succinic anhydried, vinylformic acid, methacrylic acid, methyl acrylate, ethyl propenoate, methyl methacrylate, the mixture of one or more compositions in the glytidyl methacrylate;
Thermo-stabilizer is a phenols, amine, phosphorous acid esters, half Hinered phenols, the mixture class of acryl functional group and monothioester, the mixture of one or more compositions in the calixarene kind thermo-stabilizer, the preferred dihydroxyphenyl propane of described phenols thermo-stabilizer, bisphenol-c, 2, the mixture of one or more compositions in the 6-ditertbutylparacresol, the preferred diphenyl-para-phenylene diamine of described amine thermo-stabilizer, the diphenyl-para-phenylene diamine, 4-hydroxy-dodecanoic acid anilide, the mixture of one or more compositions in the 4-hydroxyl octadecanoic acid anilide, the preferred trisnonyl phenyl phosphite of described phosphorous acid ester type thermal stabilizing agent, triphenyl phosphite, the mixture of one or more compositions in the hot diphenyl ester of phosphorous acid, described half Hinered phenols thermo-stabilizer preferred 1,3,5-trimethylammonium-2,4,6-three (3.5-di-tert-butyl-4-hydroxyl benzyl) benzene, Three methyl Benzene, 2,2 '-mixture of one or more compositions in the methylene bis (4-ethyl-6 tert.-butyl phenol), the preferred Tyox B of mixture type thermal stabilizing agent of described acryl functional group and monothioester, described calixarene kind thermo-stabilizer are preferably to the tertiary butyl 4 calixarene, to the tertiary butyl 6 calixarene, mixture to one or more compositions in the tertiary butyl 8 calixarene;
Processing aid is low molecule ester class, the metallic soap class, stearic acid complex ester class, the mixture of one or more compositions in the amides processing aid, the preferred butyl stearate of described low molecule ester class processing aid, glyceryl monostearate, the mixture of one or more compositions in the Tristearoylglycerol, the preferred calcium stearate of described metallic soap class processing aid, Zinic stearas, Magnesium Stearate, the mixture of one or more compositions in the lead stearate, the preferred Tripolyglycerol monostearates of described stearic acid complex ester class processing aid, the Polyglycerine monostearate, the mixture of one or more compositions in, the preferred amine hydroxybenzene of described amides processing aid, stearylamide, the mixture of one or more compositions in the ethylene bis stearamide.
The sample of preparation is carried out the breaking tenacity test according to GB1040-92, carry out the limiting oxygen index(LOI) test, carry out the Vicat softening point test, carry out the melt flow rate (MFR) test according to GB3682-88 according to ASTM D 1525 according to GB2406-93.
Embodiment 1
It is (40～50) that 10 weight account polyethylenes, 30 parts by weight of ethylene-vinyl acetate copolymer, 10 weight part synergistic flame retardants, 19.5 weight part compatilizers, 0.2 weight part thermo-stabilizer, 0.3 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 30 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Embodiment 2
It is (40～50) that 30 weight account polyethylenes, 10 parts by weight of ethylene-vinyl acetate copolymer, 10 weight part synergistic flame retardants, 19.5 weight part compatilizers, 0.2 weight part thermo-stabilizer, 0.3 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 30 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Embodiment 3
It is (40～50) that 20 weight account polyethylenes, 20 parts by weight of ethylene-vinyl acetate copolymer, 5 weight part synergistic flame retardants, 14.5 weight part compatilizers, 0.2 weight part thermo-stabilizer, 0.3 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 40 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Embodiment 4
It is (40～50) that 25 weight account polyethylenes, 15 parts by weight of ethylene-vinyl acetate copolymer, 3 weight part synergistic flame retardants, 6.5 weight part compatilizers, 0.2 weight part thermo-stabilizer, 0.3 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 50 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Embodiment 5
It is (40～50) that 20 weight account polyethylenes, 30 parts by weight of ethylene-vinyl acetate copolymer, 9 weight part synergistic flame retardants, 9.5 weight part compatilizers, 0.5 weight part thermo-stabilizer, 1 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 30 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Embodiment 6
It is (40～50) that 30 weight account polyethylenes, 10 parts by weight of ethylene-vinyl acetate copolymer, 1 weight part synergistic flame retardant, 14.5 weight part compatilizers, 2 weight part thermo-stabilizers, 0.5 weight part processing aid are added length-to-diameter ratio: in 1 the twin screw extruder, the side spout of 42 parts by weight of flame retardant from twin screw extruder added wherein; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing, sample preparation, test.
The performance test results is: limiting oxygen index(LOI) 〉=31%, breaking tenacity 〉=12MPa, elongation at break 〉=180%, Vicat softening point 〉=65 ℃, melt flow rate (MFR) (MFR) 〉=1.5g/10min.
Claims (4)
1. a halogen-free flame-proof cable sheath material is characterized in that, the weight percent that it is formed and each is formed is as follows:
Polyethylene 10%～30%
Ethylene-vinyl acetate copolymer 10%～30%
Fire retardant 30%～50%
Synergistic flame retardant 1%～10%
Compatilizer 6.5%～19.5%
Thermo-stabilizer 0.2%～2%
Processing aid 0.3%～1%
Above-mentioned composition proportioning sum is 100%;
Wherein: fire retardant is the mixture of magnesium hydroxide or aluminium hydroxide or both compositions, and synergistic flame retardant is a phosphazene compound, is the mixture of one or more compositions in phenoxy phosphazene, three O-Phenylene Diamine basic rings, three phosphonitriles, six isopropoxy rings, three phosphonitriles;
Compatilizer is the polar monomer graftomer, the polar monomer graftomer is that polymeric matrix is a polyethylene, polypropylene, the multipolymer of vinylbenzene and divinyl, ethene-styrene-propene terpolymer, ethylene-propylene-butadiene terpolymer, ethylene-acrylate copolymer, the mixture of one or more compositions in ethylene-acrylate-glycidyl methacrylate copolymer, polar monomer are maleic anhydride, fumaric acid, methylene-succinic acid, citraconic acid, citraconic anhydride, the vinyl Succinic anhydried, vinylformic acid, methacrylic acid, methyl acrylate, ethyl propenoate, methyl methacrylate, the mixture of one or more compositions in the glytidyl methacrylate;
Thermo-stabilizer is the mixture class of phenols, amine, phosphorous acid esters, half Hinered phenols, acryl functional group and monothioester, the mixture of one or more compositions in the calixarene kind thermo-stabilizer, and processing aid is the mixture of one or more compositions in low molecule ester class, metallic soap class, stearic acid complex ester class, the amides processing aid;
Described polyethylene is that molecular weight is 20～500,000 linear low density polyethylene; Described ethylene-vinyl acetate copolymer is to contain the multipolymer that vinyl acetate is 20～30% weight percents.
2. halogen-free flame-proof cable sheath material according to claim 1; it is characterized in that; described phenols thermo-stabilizer is a dihydroxyphenyl propane; bisphenol-c; 2; the mixture of one or more compositions in the 6-ditertbutylparacresol; described amine thermo-stabilizer is a diphenyl-para-phenylene diamine; the diphenyl-para-phenylene diamine; 4-hydroxy-dodecanoic acid anilide; the mixture of one or more compositions in the 4-hydroxyl octadecanoic acid anilide; described phosphorous acid ester type thermal stabilizing agent is a trisnonyl phenyl phosphite; triphenyl phosphite; the mixture of one or more compositions in the hot diphenyl ester of phosphorous acid; described half Hinered phenols thermo-stabilizer is 1; 3; 5-trimethylammonium-2; 4; 6-three (3; 5-di-t-butyl-4-hydroxybenzyl) benzene; 2; the mixture of one or more compositions in the 2'-methylene bis (4-ethyl-6 tert.-butyl phenol); the mixture type thermal stabilizing agent of described acryl functional group and monothioester is a Tyox B, and described calixarene kind thermo-stabilizer is to the tertiary butyl-4-calixarene; to the tertiary butyl-6-calixarene; mixture to one or more compositions in the tertiary butyl-8-calixarene.
3. halogen-free flame-proof cable sheath material according to claim 1, it is characterized in that, described low molecule ester class processing aid is a butyl stearate, glyceryl monostearate, the mixture of one or more compositions in the Tristearoylglycerol, described metallic soap class processing aid is a calcium stearate, Zinic stearas, Magnesium Stearate, the mixture of one or more compositions in the lead stearate, described stearic acid complex ester class processing aid is a Tripolyglycerol monostearates, the Polyglycerine monostearate, the mixture of one or more compositions in, described amides processing aid is an amine hydroxybenzene, stearylamide, the mixture of one or more compositions in the ethylene bis stearamide.
4. the preparation technology of the described halogen-free flame-proof cable sheath material of claim 1, it is characterized in that, its concrete operations are as follows: be (40～50) with polyethylene, ethylene-vinyl acetate copolymer, synergistic flame retardant, compatilizer, thermo-stabilizer and processing aid by adding length-to-diameter ratio after the proportioning weighing at first: in 1 the twin screw extruder, fire retardant is added wherein by the side spout from twin screw extruder after the proportioning weighing; Then 170～200 ℃ carry out mixing, extrude, tie rod, cooling, pelletizing get final product.
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| CN2009100501659A CN101875735B (en) | 2009-04-28 | 2009-04-28 | Halogen-free flame-retardant cable sheath material and preparation process thereof |
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| CN2009100501659A CN101875735B (en) | 2009-04-28 | 2009-04-28 | Halogen-free flame-retardant cable sheath material and preparation process thereof |
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| CN101875735B true CN101875735B (en) | 2013-07-31 |
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| CN1465616A (en) * | 2002-06-21 | 2004-01-07 | 中国科学院化学研究所 | Magnetsium hydroxide halogen-free polythene flame redardant composite material |
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