CN1379412A - Flame retardant cable with protective sheath against rodents and/or termites - Google Patents
Flame retardant cable with protective sheath against rodents and/or termites Download PDFInfo
- Publication number
- CN1379412A CN1379412A CN 02120181 CN02120181A CN1379412A CN 1379412 A CN1379412 A CN 1379412A CN 02120181 CN02120181 CN 02120181 CN 02120181 A CN02120181 A CN 02120181A CN 1379412 A CN1379412 A CN 1379412A
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- Prior art keywords
- cable
- insulation
- power transmission
- transmission cable
- internal layer
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- Granted
Links
- 241000256602 Isoptera Species 0.000 title claims abstract description 19
- 239000003063 flame retardant Substances 0.000 title claims abstract description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 241000283984 Rodentia Species 0.000 title claims abstract description 8
- 230000001681 protective effect Effects 0.000 title 1
- 238000009413 insulation Methods 0.000 claims abstract description 38
- 229920000642 polymer Polymers 0.000 claims abstract description 18
- 239000006223 plastic coating Substances 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 14
- 229910052736 halogen Inorganic materials 0.000 claims description 12
- 150000002367 halogens Chemical class 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 239000002341 toxic gas Substances 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 4
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 4
- 239000000347 magnesium hydroxide Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000004067 bulking agent Substances 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000000575 pesticide Substances 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims 1
- 239000002574 poison Substances 0.000 claims 1
- 231100000614 poison Toxicity 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 25
- 239000012774 insulation material Substances 0.000 abstract 1
- 229920001903 high density polyethylene Polymers 0.000 description 13
- 239000004700 high-density polyethylene Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229920002943 EPDM rubber Polymers 0.000 description 4
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- CGPRUXZTHGTMKW-UHFFFAOYSA-N ethene;ethyl prop-2-enoate Chemical compound C=C.CCOC(=O)C=C CGPRUXZTHGTMKW-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 2
- 239000004708 Very-low-density polyethylene Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 238000010382 chemical cross-linking Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 2
- 239000012433 hydrogen halide Substances 0.000 description 2
- 229910000039 hydrogen halide Inorganic materials 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- RREGISFBPQOLTM-UHFFFAOYSA-N alumane;trihydrate Chemical compound O.O.O.[AlH3] RREGISFBPQOLTM-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229920001866 very low density polyethylene Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01B3/42—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 polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
Cable with double conductor insulation, the inner layer of which consists of a halogen-free, flame-retardant polymer and the outer layer of which at least partly comprises a tough plastic coating. The insulation is on the one hand resistant to rodents and termites and on the other hand has a high flame resistance and less corrosive properties than known halogenated insulation materials. The overall performance profile of the insulation according to the invention can be met by a functional division between the two layers. The outer layer serves to protect the electrical conductor from termites and rodents. The inner layer serves the function of ensuring, in particular, the flame retardancy and the electrical properties of the insulation of the conductor.
Description
The present invention relates to a kind of cable with insulation, this insulation is used to resist rodent and termite on the one hand, compare with well-known halogenation insulating material on the other hand, this insulation has high anti-flammability, less corrosivity and produce cigarette and more a spot of toxic gas of relatively small amount when when burning.
Cable according to the present invention is specially adapted to power transmission cable, for example be used for being laid on the ground of containing termite or underground or be laid on the power transmission cable of building, perhaps be used to transport the cable of industry, or it is a signal cable, for example communication cable or light signal cable, or it is adapted at above-mentioned line zone and is used for the sound of local area network (LAN) or the transmission of data.
Being laid on underground power transmission cable is, pressure also is applicable to the cable of low pressure in for example being applicable to, voltage is lower than the cable of 1kV in other words.
What only describe below can being pointed out that is power transmission cable, but can be applicable to other above-mentioned cable equally, only need do some variations.
The animal pest that infringement is laid on underground power transmission cable comprises termite, and termite is that a kind of insect and termite that typically lives in the torrid zone or subtropical zone also appears at meridional some areas.In this, termite is damaged outside sheath, and this sheath preferably is made of plastics, and also damages the conductor insulation of power transmission cable, and therefore reduces the latter's useful life and operating reliability.
Power transmission cable has one by Ampereconductors and the core formed of insulation sheath.Be used to provide the midium voltage cable from 10 to 30kV voltage, comprise that further one contains the sheath of neutral conductor, it surrounds the insulation sheath.Power transmission cable also often is made into multicore, as three-core cable.The latter is made up of three strands of cables that twist together each other, and they are fixed together by sheath, and this sheath to small part is made by polyvinyl chloride or polyethylene.
In order to increase the service life and to increase operating reliability; known the be laid on ground or the underground power transmission cable that contain termite further have a protection sheath; this protection sheath surrounds insulation sheath or sheath; it is to make for example a kind of metal coating sheath by anti-termite or the material that not influenced by termite.
Therefore, WO95/20227 has disclosed a kind of cable, and this cable has one at last and coatedly crosses the band wound conductor of mica and have an insulating polymer layer and be embedded in the sheath of being made by the polymer that is filled with inorganic material.Apply a metal coating with the flexibility of guaranteeing cable and protection its with opposing rodent and termite, this metal coating is shaped to the metal sheaf of being made by the ripple steel band.
In the embodiment that is used for such use of their design, this power transmission cable has some shortcomings, because the supplementary protection sheath, the production of cable is very complicated with relative more expensive.
In addition, have the power transmission cable of metal coating sheath, also comprise the three-core cable of making by them, have relatively large cross section and heavier relatively, consequently storing, having when transporting and laying these cables some shortcomings.Therefore, for example, for the purpose that stores and transport, cable or three-core cable partly are wound onto on the roller, wherein during being wound on the roller, cable needs to observe the diameter of reel, this diameter is the function of cable size the and wherein useful space on roller and the maximum weight that allowed can produce out of season restriction to the length of cable section.
On the other hand, the fire-proof resin composition that typically is used for the insulation of electric wire and cable and sheath be before this known be to prepare with it by mixing with Corvic, neoprene or chlorosulfonated polyethylene rubber as the antimonous oxide of fire retardant, or prepare by antimonous oxide, a kind of chlorine fire retardant or bromine flame retardant are mixed with polyethylene, ethylene-vinyl acetate copolymer or ethylene-propylene rubber.
Because these compositions contain halogen in its base resin or fire retardant, they can produce a large amount of as hydrogen halide (hydrogen chloride gas when high temperature, bromize hydrogen gas) and the toxic gas of halogen gas (chlorine), thus can involve serious safety problem.Therefore, use the product of these compositions to be unsuitable for being applied in the place high to safety requirements, for example, subway, building, naval vessel, nuclear power station and local area network (LAN).And also having a shortcoming is that halogen gas and hydrogen halide can corrode contiguous conductor etc.
In order to improve the thermal endurance except that anti-flammability of traditional flame retardant resin composition, in the crosslinked base resin that is used in them, for example polyethylene and ethylene-propylene rubber.Chemical crosslinking and electron beam crosslinking quilt are through being usually used in this kind processing.In chemical crosslinking, under high temperature and high pressure, composition heat-treated and therefore need special pressure vessel and heating appliances with steam etc.On the other hand, electron beam crosslinking needs an electron beam emission cavity and a device.Every kind crosslinked all needs sizable cross-linking apparatus, and this has just improved cost of equipment and maintenance cost greatly, has therefore increased the production cost of composition.
About traditional cable, the serious problems that other also can occur, wherein when the internal structural element of the cable core of for example being made by polyethylene and crosslinked polyethylene is exposed in the flame, they can melt and the surface that flow to cable as water droplet, they can gasify and be on fire immediately under the high temperature atmosphere at this, so cable fire and make fire become bigger.
In addition, having the insulation that do not contain any halogen and the cable of sheath material is being poor aspect the anti-flammability than the cable that those have these components.To have the not anti-flammability of the cable of halogen-containing insulating material in order improving, need to mix a large amount of metal hydrates therein, for example aluminum trihydrate (ATH) and/or magnesium hydroxide; But this will reduce the physics and the electric property of cable.In order to overcome these shortcomings, developed power transmission cable with two-layer conductor insulation.Therefore, Swiss Patent 664230 has disclosed a kind of insulated electric conductor, and this conductor has not halogen-containing internal insulating layer and an external protection, and this internal insulating layer comprises fire retardant, halogen-containing, not crosslinked polyolefin copolymer; This external protection comprises polyamide, thermoplastics, not halogen-containing polyester elastomer or not halogen-containing aromatic-polyether.The polymer that is well known that these two insulating barriers is not really compatible to each other, consequently conductor insulation two-layer to each other can not be bonding or bonding to each other very poor, so therefore undesirable restriction is applied on the mechanical strength.And the conductor insulation that is disclosed in the power transmission cable in the Swiss Patent 664230 is not to produce with independent extrusion step.On the contrary, concerning metallic conductor, need implement in two processing steps independent of each other, its result is a kind of sizable shortcoming to economical production.
An object of the present invention is, start from the insulated electric conductor that WO95/20227 discloses, advise a kind of cable, it can resist rodent and/or termite on the one hand, and compare with known halogenated materials on the other hand, has high anti-flammability, less corrosion and the relative few cigarette of generation and more a spot of toxic gas when it burns.
This purpose reaches by a kind of cable with feature of claim 1 according to the present invention, just, have a core insulation, this core insulation produces more a spot of toxic gas and this core insulation when it burns be a kind of coextrusion thing and by internal layer and outer the composition.Internal layer is made up of not halogen-containing, flame-retardant polymer or polymeric blends, and outer at least a portion is to be made of very tough and tensile plastic coating.
Cable according to the present invention is nontoxic to the mankind, animal and insect.This means to be used to realize that the skin of protecting cable to avoid the core insulation of termite and/or rodentine infringement function does not comprise any chemical active agent, as pesticide, and described skin is a kind of mechanical protection sheath in essence.
According to the favourable embodiment of cable of the present invention obviously from dependent claims.
Can be according to the toxicity of Navel Engineering Standard Test No.NES-713 and/or the gas that measurement produces when burning according to Standard Test N.F.C.20-454, finish the toxotest of core insulation, just comprise the toxotest of the internal layer of non-halogenated polymeric material at least.
It is much lower to be worth 5 units/100g according to the average toxic unit of every 100g core insulation of the present invention than the maximum toxicity that allows.
In preferred embodiments, cable is a power transmission cable.According to the present invention, described power transmission cable has a core, and this core comprises that a plurality of Ampereconductors and this core that twist together mutually are embedded in the insulation of cylinder.
In another preferred embodiment, power transmission cable is a three-core cable, and wherein three power transmission cables twist together mutually.These cables that are used for embodiment are identical with above-mentioned power transmission cable structure in essence, and each all has a core, forms by copper stranded conductor and plastic insulation.This three-core cable is embedded in according in internal layer of the present invention and the outer cylinder insulation that constitutes.
In these cases, internal layer comprises as the aluminium hydroxide of fireproof agent and/or magnesium hydroxide with as at least a polyolefin or the polyolefin blend of polymers compositions, with skin be that very tough and tensile plastic coating and this skin comprises for example at least a portion polyethylene polymer, as high density polyethylene (HDPE) (HDPE).
Cable of the present invention satisfies industrial standard the requirement that propagation of flame and cigarette produce (or inhibition) is demonstrated low corrosivity and toxicity simultaneously.When burning, cable produces the cigarette of relatively small amount and less poison gas.Further, this cable also has satisfied for example IEC 60332-3, the performance of BS 6387 and SS299 standard.
Can be according to typical power transmission cable of the present invention in order to method production down.With the mode of co-extrusion two insulating layer of conductor are applied to successively on the copper stranded conductor of being made up of many independently lines,, are provided for forming internal layer and outer field two kinds of original materials and comprise the polymer that belongs to the above-claimed cpd kind for reaching this purpose.During extruding or afterwards, by the effect of high-power electron beam, the internal layer of conductor insulation can be by further crosslinked at least.
Divide by the function between two-layer, can be satisfied according to the overall performance distribution curve of conductor insulation of the present invention.The outer protection power transmission cable of realizing is not subjected to the function of termite and rodentine infringement.Internal layer is used in particular for realizing guaranteeing the function of the fire-retardant and electrical property of conductor insulation.
Skin does not contain fireproof agent, and the flame-retarding characteristic of total conductor insulation is provided by internal layer.Therefore, importantly make suitable volume ratio or thickness ratio between two-layer.
In further embodiment of the present invention, select internal layer and outer field polymer, make that when conductor is implemented the co-extrusion state they are bonding to each other or bond together to each other and therefore increased the anti-machinery scratch property of conductor insulation.In order further to strengthen the bonding force between two-layer, can be in addition with bulking agent and at least a internal layer polymer and/or at least a outer field compound, this bulking agent permission is crosslinked in the functional group between two-layer.
In another embodiment of the invention, select internal layer and outer field compound, pH value＞4.3 that make insulation.The result is that cable has less corrosivity and the standard that can satisfy EN 50267-2-3.
Below be the suitable polymer blend that in the context of the invention, is used to form internal layer:
-polyethylene and ethylene copolymers, as ethylene/vinyl acetate (EVA), ethylene/methyl acrylate (EMA), ethylene/butyl acrylate (EBA), ethylene/ethyl acrylate (EEA), ethylene-propylene rubber (EPR), ethylene propylene diene rubber (EPDM);
-Natene, as, density＜0.920g/cm had
3Very low density polyethylene (VLDPE);
-based on EVA, EMA, EBA, EEA, EPR, the maleic anhydride of EPDM or PE (MAH) terpolymer; With
-based on EVA, EMA, EBA, EEA, EPR, the glycidyl methacrylate of EPDM or PE (GMA) terpolymer.
The original material that is used to form internal layer has, as a kind of above-mentioned polymer or at least two kinds of mixtures that such polymer is formed of basis.
Except at least a polymer, inner layer material comprises a large amount of not halogen-containing fireproof agents, as, aluminium hydroxide or magnesium hydroxide and than minor amounts of additives, as antioxidant, hydrolysis stabilizer, processing aid, crosslinking agent and coupling agent.
The guidance prescription of inner layer material can be defined as follows:
The polymeric blends of 30-40 weight %
The aluminium hydroxide (ATH) of 40-70 weight %
The additive of 0-10 weight %
Skin is made up of very tough and tensile plastic coating.What show below is to be specially adapted to form outer field material in the present invention:
-very tough and tensile polyester elastomer, as polyether-polyester, example is Hytrel (Du Pont);
-very tough and tensile polyethylene such as high density polyethylene (HDPE) (HDPE); With
-poly copolymer and polymeric blends.
The example of HDPE is as follows:
| ?????????HDPE | Density-melt flow index (190/2.16) |
| ????Lupolen?6021D | ????HDPE?0.960-0.2 |
| ????Lupolen?6031M | ????HDPE?0.964-8.0 |
| ????NCPE?1101 | ????HDPE?0.965-7.5 |
| ????Vestolen?A6013 | ????HDPE?0.959-2.0 |
| ????Vesolen?A6012 | ????HDPE?0.958-0.9 |
If skin is made by polyethylene, the latter has 0.9g/cm at least
3Density, 0.92g/cm at least for example
3Density and preferably be 0.93g/cm at least
3Density.
Be used to form outer field original material and comprise, the polymer in being selected from one of these two groups as solvent a kind of.But be used for outer field original material also can be at least two kinds of mixture of polymers that are selected from these groups.
Further, also can comprise the additive of relatively small amount according to the skin of conductor insulation of the present invention, as antioxidant, hydrolysis stabilizer, processing aid and crosslinking agent.
According to the present invention, at least a internal layer and/or outer field polymer can for example be used the dosage of 10-25 millirad (Mrad) by crosslinking with radiation.
It is pointed out that and be used for only representing that according to the above-mentioned prescription of conductor insulation of the present invention a kind of selection and this prescription of several possibility embodiments can carry out the change of various aspects in the context of the present invention herein.
Claims (10)
1. the flame retardant cable that has the protection sheath of opposing rodent and termite; this cable has a core and a core one insulation; it is characterized in that: should insulation produce the coextrusion thing that few toxic gas and this insulation are made up of an internal layer and a skin in when burning; this internal layer is made up of not halogen-containing flame-retardant polymer; it is used in particular for realizing guaranteeing the function of the fire-retardant and electrical property of this insulation; made by tough and tensile plastic coating with this skin to small part, it is used for realizing protecting cable to avoid termite and/or rodentine infringement.
2. according to the cable of claim 1, it is characterized in that this skin does not comprise activator, for example pesticide is avoided termite and/or rodentine infringement with the protection cable.
3. according to the cable of claim 1 or 2, it is characterized in that the measured poison exponent of this insulation for less than 5 units/100 grams, therefore demonstrates hypotoxicity.
4. according to each cable in the claim 1 to 3, it is characterized in that it is the power transmission cable that a kind of that have an Ampereconductors and this Ampereconductors is insulated encirclement.
5. according to the power transmission cable of claim 4, it is characterized in that internal layer has as the aluminium hydroxide of fireproof agent and/or magnesium hydroxide with as at least a polyolefin or the polyolefin blend of polymers compositions.
6. according to the power transmission cable of claim 4 or 5, it is characterized in that this skin to small part is to be made by tough and tensile polyester elastomer and/or tough and tensile polyethylene.
7. according to the power transmission cable of claim 6, its ectomesoderm comes down to be made by tough and tensile polyethylene, it is characterized in that this poly density is 0.9g/cm at least
3, for example be 0.92g/cm at least
3And preferably be 0.93g/cm at least
3
8. according to each power transmission cable in the claim 4 to 7, it is characterized in that internal layer and/or the outer bulking agent that is used to increase bonding strength that also comprises.
9. according to each power transmission cable in the claim 4 to 8, it is characterized in that internal layer and/or skin are crosslinked.
10. according to each power transmission cable in the claim 4 to 9, it is characterized in that pH value＞4.3 of insulating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01810217.8 | 2001-03-02 | ||
| EP01810217A EP1236764A1 (en) | 2001-03-02 | 2001-03-02 | Flame-retardant cable with a protection-shield rodents and/or termites |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1379412A true CN1379412A (en) | 2002-11-13 |
| CN1224058C CN1224058C (en) | 2005-10-19 |
Family
ID=8183769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02120181 Expired - Fee Related CN1224058C (en) | 2001-03-02 | 2002-03-01 | Flame retardant cable with protective sheath against rodents and/or termites |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1236764A1 (en) |
| CN (1) | CN1224058C (en) |
| MY (1) | MY145309A (en) |
| SG (1) | SG112827A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633756B (en) * | 2009-05-22 | 2012-02-08 | 上海凯波特种电缆料厂有限公司 | Physical termite-proof high hard sheath material and preparation method thereof |
| CN105139941A (en) * | 2012-11-19 | 2015-12-09 | 日立金属株式会社 | Non-halogen multilayer insulation wire |
| CN111674005A (en) * | 2020-05-26 | 2020-09-18 | 深圳市特发信息股份有限公司 | Double-layer sheath optical cable and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH708133B1 (en) * | 2013-06-03 | 2017-06-30 | Leoni Studer Ag | Electric cables, in particular for solar or wind power plants. |
| CH709972B1 (en) | 2014-08-11 | 2018-12-14 | Studer Christoph | Electrical cable. |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3537221A1 (en) * | 1985-10-17 | 1987-04-23 | Siemens Ag | FLAME RETARDANT AND HALOGEN-FREE TRAINED INSULATION |
| GB2190384A (en) * | 1986-05-12 | 1987-11-18 | Exxon Chemical Patents Inc | Halogen free flame retardant compositions |
| US5288785A (en) * | 1993-06-14 | 1994-02-22 | Union Carbide Chemicals & Plastics Technology Corporation | Low voltage power cables |
| JPH09216971A (en) * | 1996-02-09 | 1997-08-19 | Fujikura Ltd | Flame-retardant resin composition and cable |
| CA2297155C (en) * | 1997-07-23 | 2006-09-12 | Pirelli & C. S.P.A. | Low-smoke self-extinguishing cable and flame-retardant composition used therein |
| EP1102282A1 (en) * | 1999-11-19 | 2001-05-23 | Studer Draht-und Kabelwerk AG | Electrical cable |
-
2001
- 2001-03-02 EP EP01810217A patent/EP1236764A1/en not_active Withdrawn
-
2002
- 2002-03-01 MY MYPI20020749 patent/MY145309A/en unknown
- 2002-03-01 SG SG200201206A patent/SG112827A1/en unknown
- 2002-03-01 CN CN 02120181 patent/CN1224058C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633756B (en) * | 2009-05-22 | 2012-02-08 | 上海凯波特种电缆料厂有限公司 | Physical termite-proof high hard sheath material and preparation method thereof |
| CN105139941A (en) * | 2012-11-19 | 2015-12-09 | 日立金属株式会社 | Non-halogen multilayer insulation wire |
| US9530536B2 (en) | 2012-11-19 | 2016-12-27 | Hitachi Metals, Ltd. | Non-halogen multilayer insulated wire and method for producing the same |
| CN111674005A (en) * | 2020-05-26 | 2020-09-18 | 深圳市特发信息股份有限公司 | Double-layer sheath optical cable and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| SG112827A1 (en) | 2005-07-28 |
| EP1236764A1 (en) | 2002-09-04 |
| MY145309A (en) | 2012-01-13 |
| CN1224058C (en) | 2005-10-19 |
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Granted publication date: 20051019 Termination date: 20160301 |