CN118444445A - Flame-retardant optical cable - Google Patents
Flame-retardant optical cable Download PDFInfo
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- CN118444445A CN118444445A CN202410889551.1A CN202410889551A CN118444445A CN 118444445 A CN118444445 A CN 118444445A CN 202410889551 A CN202410889551 A CN 202410889551A CN 118444445 A CN118444445 A CN 118444445A
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- maleic anhydride
- retardant
- thermosensitive
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 115
- 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 106
- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000004793 Polystyrene Substances 0.000 claims abstract description 77
- 229920002223 polystyrene Polymers 0.000 claims abstract description 77
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- 150000001412 amines Chemical class 0.000 claims abstract description 54
- 229920000570 polyether Polymers 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003094 microcapsule Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 24
- 229910052810 boron oxide Inorganic materials 0.000 claims abstract description 14
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920001577 copolymer Polymers 0.000 claims abstract description 12
- 239000011259 mixed solution Substances 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 36
- 239000013307 optical fiber Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 26
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 24
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 24
- 229910021641 deionized water Inorganic materials 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 21
- 238000002360 preparation method Methods 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 18
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 16
- 238000001179 sorption measurement Methods 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 12
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 239000011257 shell material Substances 0.000 claims description 11
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 claims description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229910001377 aluminum hypophosphite Inorganic materials 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- CQYBWJYIKCZXCN-UHFFFAOYSA-N diethylaluminum Chemical compound CC[Al]CC CQYBWJYIKCZXCN-UHFFFAOYSA-N 0.000 claims description 8
- 239000003995 emulsifying agent Substances 0.000 claims description 8
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 claims description 8
- 239000008098 formaldehyde solution Substances 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 230000001804 emulsifying effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 abstract description 5
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- 229920000728 polyester Polymers 0.000 description 11
- 238000007664 blowing Methods 0.000 description 10
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- 239000002775 capsule Substances 0.000 description 5
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- 238000013329 compounding Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical group O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
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- 229910021389 graphene Inorganic materials 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
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- 230000002787 reinforcement Effects 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a flame-retardant optical cable which comprises a cable core, a first armor layer, an inner sheath, a water-resistant layer, a flame-retardant belt, a second armor layer and a flame-retardant outer sheath which are sequentially arranged from inside to outside, wherein a thermosensitive ribbon is arranged on the flame-retardant outer sheath. The flame-retardant optical cable provided by the invention has the functions of double early warning and flame spreading prevention; the nano boron oxide is added into the thermosensitive microcapsule, so that the sensitivity of the thermosensitive microcapsule to temperature is improved; the polyether amine modified polystyrene maleic anhydride takes polystyrene maleic anhydride as a main chain, the polyether amine is taken as a side chain, the polystyrene maleic anhydride is modified by polyether amine, so that the water solubility and the thermal stability of the polystyrene maleic anhydride are increased, meanwhile, the effect of stable dispersion is achieved, the precipitation and aggregation of thermosensitive microcapsules are prevented, the compatibility of each component in the sheath material is synergistically improved by the polyether amine modified polystyrene maleic anhydride and the maleic anhydride grafted ethylene-1-octene copolymer, and meanwhile, the thermosensitive ribbon is tightly connected with the flame-retardant outer sheath and is not easy to fall off.
Description
Technical Field
The invention belongs to the technical field of optical cables, and particularly relates to a flame-retardant optical cable.
Background
Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications by utilizing one or more optical fibers disposed in a covering sheath as a transmission medium and may be used alone or in groups of communication cable assemblies. The communication pulse of the communication optical cable safety affairs country and society is the basis of the information society. The flame-retardant optical cable is a form derived from the communication optical cable, has good flame retardance besides meeting basic communication functions, and is widely applied to the fire disaster high-rise fields of subway tunnels, railways, building groups and the like.
Flame-retardant cables generally have improved flame retardant properties by improving the cable jacket material, but the better the flame retardant properties, the more expensive the jacket material is, and the slower the flame will burn up when exposed to an open flame, and fire hazards still remain.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a flame-retardant optical cable.
In order to achieve the above purpose and achieve the above technical effects, the invention adopts the following technical scheme:
The utility model provides a fire-retardant optical cable, includes cable core, first armor, inner sheath, water-blocking layer, fire-retardant area, second armor and the fire-retardant oversheath that from interior to exterior set gradually, be provided with the thermal-sensitive ribbon on the fire-retardant oversheath.
Further, the cable core comprises a communication unit, a temperature sensing early warning unit and a tensile unit, and the cable core is formed by twisting the communication unit, the temperature sensing early warning unit and the tensile unit.
Further, the tensile unit is arranged at the central position of the cable core, and the communication unit and the temperature sensing early warning unit are arranged at the periphery of the tensile unit.
Further, the communication unit comprises a plurality of sleeves, a plurality of high-temperature resistant optical fibers are arranged in the sleeves, the temperature sensing early warning unit comprises a plurality of temperature sensing optical fibers, the temperature sensing optical fibers are arranged outside the sleeves, and the temperature sensing optical fibers are connected with the signal processor through the detector.
Further, the thickness of the flame-retardant belt is 0.3-0.5mm, the flame-retardant belt comprises a flame-retardant layer, a heat-insulating layer, a flame-retardant layer and an adsorption layer, the thickness of the flame-retardant layer is 0.25-0.1mm, and the thickness of the adsorption layer is 0.02-0.05mm.
Further, the preparation raw materials of the thermal ribbon comprise:
5-7 parts of thermosensitive microcapsule, 20-23 parts of ethylene-vinyl acetate copolymer, 15-18 parts of polyolefin elastomer, 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer, 2-4 parts of polyether amine modified polystyrene maleic anhydride, 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide, 2-4 parts of expandable graphite, 2-3 parts of lubricant, 3-5 parts of silane coupling agent and 2-3 parts of antioxidant.
Further, the preparation steps of the thermosensitive ribbon include:
(1) 5-7 parts of thermosensitive microcapsules and 3-5 parts of silane coupling agent are put into a grinder for mixed grinding for 10-20min, so as to obtain mixed liquid of the thermosensitive microcapsules and the silane coupling agent, 0.5-1 part of polyether amine modified polystyrene maleic anhydride is added into the mixed liquid, and the mixed liquid is put into the grinder and ground until the granularity is less than 0.05mm, so that thermosensitive mixed liquid is obtained;
(2) Adding 20-23 parts of ethylene-vinyl acetate copolymer, 15-18 parts of polyolefin elastomer, 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer and 2-3 parts of lubricant into an internal mixer for internal mixing; adding 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide and 2-4 parts of expandable graphite, and continuously banburying and mixing;
(3) Adding the thermosensitive mixed solution prepared in the step (1) into the mixture after the banburying in the step (2), uniformly stirring, adding the rest parts by weight of polyether amine modified polystyrene maleic anhydride, uniformly stirring, adding 2-3 parts of antioxidant, and fully stirring for later use;
(4) And (3) conveying the material obtained in the step (3) into a double-screw extruder for melt extrusion, cooling and drying, and conveying the material into a granulator for granulating.
Further, the polyether amine modified polystyrene maleic anhydride preparation raw materials comprise:
2-3 parts of polyether amine, 8-10 parts of polystyrene maleic anhydride, 12-14 parts of dimethylformamide and 73-78 parts of deionized water.
Further, the preparation method of the polyetheramine modified polystyrene maleic anhydride comprises the following steps:
(1) Mixing 8-10 parts of polystyrene maleic anhydride with 12-14 parts of dimethylformamide, and magnetically stirring for 10-15min at the temperature of 23-28 ℃ to prepare polystyrene maleic anhydride mixed solution;
(2) Adding 2-3 parts of polyetheramine into a polytetrafluoroethylene lining high-pressure reaction kettle, keeping the temperature at 50-60 ℃ for 4-5 hours, adding a polystyrene maleic anhydride mixed solution, and keeping the temperature at 50-60 ℃ for 1-1.5 hours to prepare a polyetheramine modified polystyrene maleic anhydride mixed solution;
(3) And cooling the polyether amine modified polystyrene maleic anhydride mixed solution, adding 73-78 parts of deionized water for washing, and drying to obtain the required polyether amine modified polystyrene maleic anhydride.
Further, the preparation raw materials of the thermosensitive microcapsule comprise:
1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A, 4-8 parts of formaldehyde solution, 25-30 parts of hexadecanol, 55-60 parts of deionized water, 2-3 parts of melamine, 0.5-1 part of triethanolamine, 0.5-1 part of emulsifier, 0.2-0.5 part of nano boron oxide and 0.3-0.5 part of citric acid;
The preparation method of the thermosensitive microcapsule comprises the following steps:
(1) Magnetically stirring 1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A and 25-30 parts of hexadecanol at 80-90 ℃ for 25-30min to prepare a color-changing compound;
(2) Mixing and stirring 5-10 parts of deionized water, 4-8 parts of formaldehyde solution and 2-3 parts of melamine, adding 0.2-0.5 part of triethanolamine after uniformly stirring, and adjusting the pH of the solution to 8-9 to form a mixed solution A; placing the mixed solution A at 65-70 ℃ for heat preservation for 1-1.5h;
(3) Performing ultrasonic treatment on 0.2-0.5 part of nano boron oxide for 30-35min, and adding the nano boron oxide into the mixed solution A to form a shell material prepolymer mixed solution;
(4) Mixing 0.5-1 part of emulsifier and 10-20 parts of deionized water, stirring, adding the color-changing compound, and emulsifying at 65-70deg.C for 8-12min; then adding the shell material prepolymer mixed solution, mixing and stirring, then dripping 0.3-0.5 part of citric acid, adjusting the pH value to 4-5, and reacting for 2-3 hours; after the reaction is finished, dropwise adding the rest weight parts of triethanolamine, and continuously adjusting the pH value until the solution is neutral; and then adding the rest parts by weight of deionized water for washing and drying after cooling, and finally obtaining the needed thermosensitive microcapsule.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention discloses a flame-retardant optical cable, which has double early warning functions, and comprises the following steps: the built-in temperature sensing optic fibre of cable core, when the inside temperature of cable core risees, temperature sensing optic fibre discerns that the temperature changes, and the optical signal produces the change, and the detector detects the optical signal and transmits it to signal processor and handle, and the data after the processing can send into in the fire alarm controller and early warning, the second: the heat-sensitive color ribbon is arranged on the flame-retardant outer sheath, when a fire disaster occurs, the surface temperature of the flame-retardant outer sheath rises rapidly, the color of the heat-sensitive color ribbon changes rapidly, and a worker can realize rapid inspection and fire extinguishment according to the color change;
2) The invention discloses a flame-retardant optical cable which has a good flame spreading prevention function. The inner sheath is made of sheath materials containing ceramic oxidation-resistant materials, when flame burns to the inner sheath, the inner sheath is in a shell shape after being burnt, so that the interference of flame to a cable core is reduced, a flame-retardant belt is arranged between the inner sheath and the flame-retardant outer sheath, when the flame burns to the flame-retardant belt, the adsorption layer starts to adsorb surrounding smoke dust, if the flame burns to the flame-retardant layer, the fire-extinguishing capsule powder is influenced by temperature and starts to be released, flame spreading can be prevented, the flame can be prevented from burning by the flame-retardant polyester belt, and the influence on the cable core is reduced;
3) The invention discloses a flame-retardant optical cable, wherein nano boron oxide is added into a thermosensitive microcapsule, so that the sensitivity of the thermosensitive microcapsule to temperature is improved; the polyether amine modified polystyrene maleic anhydride takes polystyrene maleic anhydride as a main chain, polyether amine is taken as a side chain, the polystyrene maleic anhydride is modified by polyether amine, so that the water solubility and the thermal stability of the polystyrene maleic anhydride are increased, the effect of stable dispersion is achieved, the precipitation and aggregation of thermosensitive microcapsules are prevented, the polyether amine modified polystyrene maleic anhydride has good compatibility, the compatibility of each component in the sheath material is cooperatively improved by compounding the polyether amine modified polystyrene maleic anhydride and the maleic anhydride grafted ethylene-1-octene copolymer, and meanwhile, the thermosensitive ribbon is tightly connected with the flame-retardant outer sheath and is not easy to fall off.
Drawings
FIG. 1 is a schematic view of a flame retardant fiber optic cable according to the present invention;
FIG. 2 is a schematic structural view of a flame retardant tape of the present invention;
Wherein, 1-cable core; 2-a first armor layer; 3-an inner sheath; 4-a water blocking layer; 5-flame retardant tape; 51-a flame retardant layer; 52-a heat insulation layer; 53-a fire barrier; 54-an adsorption layer; 6-a second armor layer; 7-a flame retardant outer sheath; 8-a thermosensitive ribbon; 11-a sleeve; 12-temperature sensing optical fiber; 13-tensile unit.
Detailed Description
The present invention is described in detail below so that advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and unambiguous the scope of the present invention.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
As shown in fig. 1-2, the invention discloses a flame-retardant optical cable, which comprises a cable core 1, a first armor layer 2, an inner sheath 3, a water-resistant layer 4, a flame-retardant belt 5, a second armor layer 6 and a flame-retardant outer sheath 7 which are sequentially arranged from inside to outside, wherein a thermosensitive ribbon 8 is arranged on the flame-retardant outer sheath 7. The cable core 1 is externally longitudinally wrapped with the first armor layer 2 and then is extruded with the inner sheath 3, the inner sheath 3 is made of sheath materials containing ceramic oxidation-resisting materials, when flame burns to the inner sheath 3, the inner sheath 3 is in a shell shape after being completely burnt, interference of flame to the cable core 1 is reduced, the inner sheath 3 is externally provided with the waterproof layer 4, the waterproof layer 4 can be a waterproof belt or waterproof yarns and the like, the waterproof layer 4 is externally provided with the flame retardant belt 5, the flame retardant belt 5 can play a role in slowing down the flame burning speed and locally extinguishing fire, and meanwhile, the flame retardant belt 5 is provided with a role in adsorbing smoke dust generated after burning, and the second armor layer 6 is longitudinally wrapped with the flame retardant outer sheath 7 and the thermosensitive ribbon 8.
In some embodiments, the cable core 1 includes a communication unit, a temperature sensing and early warning unit, and a tensile unit 13, wherein the tensile unit 13 is disposed at a central position of the cable core 1, the communication unit and the temperature sensing and early warning unit are disposed at a periphery of the tensile unit 13, and the communication unit, the temperature sensing and early warning unit, and the tensile unit 13 form the cable core 1 through a cabling twisting process.
In some specific embodiments, the communication unit includes a plurality of sleeves 11, a plurality of high temperature resistant optical fibers are arranged in the sleeves 11, the temperature sensing early warning unit includes a plurality of temperature sensing optical fibers 12, the temperature sensing optical fibers 12 are arranged outside the sleeves 11, the temperature sensing optical fibers 12 are connected with the signal processor through the detector, the early warning function is convenient to realize, the tensile unit 13 is a central reinforcing member, and nonmetal materials such as FRP, KFRP and the like can be adopted.
In some embodiments, the overall thickness of the flame retardant tape 5 is 0.3-0.5mm to facilitate later-stage wrapping cabling. The flame-retardant belt 5 comprises a flame-retardant layer 51, a heat-insulating layer 52, a flame-retardant layer 53 and an adsorption layer 54, wherein the flame-retardant layer 51 is a flame-retardant polyester belt, the thickness of the flame-retardant polyester belt is 0.25-0.1mm, the adsorption layer 54 is a graphene film, and the thickness of the adsorption layer 54 is 0.02-0.05mm.
The preparation steps of the flame retardant tape 5 include:
Firstly, carrying out primary melt blowing on a flame-retardant polyester belt to form a superfine fiber net structure, then uniformly spraying ceramic aerogel on the surface of the superfine fiber net structure to form a heat insulation layer 52, and coating the ceramic aerogel inside by using meshes of the superfine fiber net to play a role in fixing the ceramic aerogel; performing secondary melt-blowing on the surface of the heat insulation layer 52 to form a superfine fiber net structure, uniformly dispersing fire extinguishing capsule powder on the surface of the superfine fiber net structure to form a fire retarding layer 53, wherein the secondary melt-blowing can penetrate through the primary melt-blowing and can play a role in bonding the structures formed by the two melt-blowing; by uniformly spraying the hot melt adhesive adsorption layer 54 on the surface of the fire-retarding layer 53, a small amount of hot melt adhesive can penetrate through the superfine fiber net structure to fix the flame-retarding polyester belt.
In some embodiments, the thermal ribbon 8 is prepared from the following raw materials in parts by weight:
5-7 parts of thermosensitive microcapsule, 20-23 parts of ethylene-vinyl acetate copolymer (EVA), 15-18 parts of polyolefin elastomer (POE), 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer, 2-4 parts of polyether amine modified polystyrene maleic anhydride, 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide, 2-4 parts of expandable graphite, 2-3 parts of lubricant, 3-5 parts of silane coupling agent and 2-3 parts of antioxidant.
The preparation steps of the thermal ribbon 8 include:
(1) And (3) putting 5-7 parts of the thermosensitive microcapsule and 3-5 parts of the silane coupling agent into a grinder, mixing and grinding for 10-20min to obtain a mixed solution of the thermosensitive microcapsule and the silane coupling agent, adding 0.5-1 part of polyether amine modified polystyrene maleic anhydride into the mixed solution, putting the mixed solution into the grinder, and grinding until the granularity is smaller than 0.05mm to obtain the thermosensitive mixed solution. The polyether amine modified polystyrene maleic anhydride takes polystyrene maleic anhydride as a main chain, the polyether amine is taken as a side chain, and the water solubility of the polystyrene maleic anhydride is increased by introducing-NH 2 into the polyether amine to modify the polystyrene maleic anhydride. The polystyrene maleic anhydride introduces polyether amine long chain, plays a role in stabilizing dispersion by utilizing steric hindrance and electrostatic repulsion of molecules, can promote the uniformity of thermosensitive mixed liquid, and prevents precipitation and aggregation of the added thermosensitive microcapsules. Meanwhile, in the processing production process, a small amount of polyether amine modified polystyrene maleic anhydride is dehydrated and subjected to ring-closing imidization, an amide bond is converted into a rigid maleimide ring-closing structure, and the thermal stability of the polyether amine modified polystyrene maleic anhydride is improved. The polyether amine modified polystyrene maleic anhydride has good compatibility, and the compatibility of each component in the sheath material is improved by compounding the polyether amine modified polystyrene maleic anhydride and the maleic anhydride grafted ethylene-1-octene copolymer, and meanwhile, the thermosensitive ribbon 8 is tightly connected with the flame-retardant outer sheath 7, so that the thermosensitive ribbon is not easy to fall off.
(2) Adding 20-23 parts of ethylene-vinyl acetate copolymer (EVA), 15-18 parts of polyolefin elastomer (POE), 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer and 2-3 parts of lubricant into an internal mixer for internal mixing; adding 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide and 2-4 parts of expandable graphite, and continuously banburying and mixing. Aluminum hydroxide, magnesium hydroxide and expandable graphite are compounded, so that the flame retardant property of the sheath material can be improved.
(3) Adding the thermosensitive mixed solution prepared in the step (1) into the mixture after the banburying in the step (2), uniformly stirring, adding the rest parts by weight of polyether amine modified polystyrene maleic anhydride, uniformly stirring, adding 2-3 parts of antioxidant, and fully stirring for later use;
(4) And (3) conveying the material obtained in the step (3) into a double-screw extruder for melt extrusion, cooling and drying, and conveying the material into a granulator for granulating.
The preparation raw materials of the thermosensitive microcapsule comprise:
1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A, 4-8 parts of formaldehyde solution, 25-30 parts of hexadecanol, 55-60 parts of deionized water, 2-3 parts of melamine, 0.5-1 part of triethanolamine, 0.5-1 part of emulsifier, 0.2-0.5 part of nano boron oxide and 0.3-0.5 part of citric acid.
The preparation method of the thermosensitive microcapsule comprises the following steps:
(1) Magnetically stirring 1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A and 25-30 parts of hexadecanol at 80-90 ℃ for 25-30min to prepare a color-changing compound;
(2) Mixing and stirring 5-10 parts of deionized water, 4-8 parts of formaldehyde solution and 2-3 parts of melamine, adding 0.2-0.5 part of triethanolamine after uniformly stirring, and adjusting the pH of the solution to 8-9 to form a mixed solution A; placing the mixed solution A at 65-70 ℃ for heat preservation for 1-1.5h;
(3) Performing ultrasonic treatment on 0.2-0.5 part of nano boron oxide for 30-35min, and adding the nano boron oxide into the mixed solution A to form a shell material prepolymer mixed solution;
(4) Mixing 0.5-1 part of emulsifier and 10-20 parts of deionized water, stirring, adding the color-changing compound, and emulsifying at 65-70deg.C for 8-12min; then adding the shell material prepolymer mixed solution, mixing and stirring, then dripping 0.3-0.5 part of citric acid, adjusting the pH value to 4-5, and reacting for 2-3 hours; after the reaction is finished, dropwise adding the rest weight parts of triethanolamine, and continuously adjusting the pH value until the solution is neutral; and then adding the rest parts by weight of deionized water for washing and drying after cooling, and finally obtaining the needed thermosensitive microcapsule.
The polyether amine modified polystyrene maleic anhydride is prepared from the following raw materials:
2-3 parts of polyether amine, 8-10 parts of polystyrene maleic anhydride, 12-14 parts of dimethylformamide and 73-78 parts of deionized water.
The preparation method of the polyether amine modified polystyrene maleic anhydride comprises the following steps:
(1) Mixing 8-10 parts of polystyrene maleic anhydride with 12-14 parts of dimethylformamide, and magnetically stirring for 10-15min at the temperature of 23-28 ℃ to prepare polystyrene maleic anhydride mixed solution;
(2) Adding 2-3 parts of polyetheramine into a polytetrafluoroethylene lining high-pressure reaction kettle, keeping the temperature at 50-60 ℃ for 4-5 hours, adding a polystyrene maleic anhydride mixed solution, and keeping the temperature at 50-60 ℃ for 1-1.5 hours to prepare a polyetheramine modified polystyrene maleic anhydride mixed solution;
(3) And cooling the polyether amine modified polystyrene maleic anhydride mixed solution, adding 73-78 parts of deionized water for washing, and drying to obtain the required polyether amine modified polystyrene maleic anhydride.
The invention also discloses a preparation method of the flame-retardant optical cable, which comprises the following steps:
1) Placing a plurality of high-temperature resistant optical fibers on a pay-off rack, setting the temperature of a sleeve extruder to 240-250 ℃, threading the optical fibers (the high-temperature resistant optical fibers) into the sleeve extruder, and forming a sleeve 11 through conventional procedures such as filling optical fiber ointment, sleeve cooling, traction, wire winding and the like;
2) The tensile unit 13, the plurality of sleeves 11 and the plurality of temperature sensing optical fibers 12 are respectively arranged on a pay-off rack, and enter a cabling twisting table to be SZ twisted after being paid off, and then the cable core 1 is formed through conventional procedures such as cable core yarn binding fixation, tractor wire winding and the like;
3) Placing the cable core 1 on a pay-off rack, paying off the cable core 1, performing metal composite strip binding longitudinal wrapping to form a first armor layer 2, wrapping an inner sheath 3 outside the first armor layer 2 by a sheath extruder, extruding the inner sheath at 180-200 ℃, and performing cooling and shaping; then enters a water blocking tape wrapping machine, and a water blocking layer 4 is formed outside the inner sheath 3; forming a flame-retardant belt 5 outside the water-resistant layer 4, and then performing metal composite belt binding longitudinal wrapping to form a second armor layer 6; the extrusion temperature of the flame-retardant outer sheath 7 and the thermal ribbon 8 is set to be 180-200 ℃ respectively by adopting a sheath double-layer coextrusion process, the flame-retardant outer sheath 7 and the thermal ribbon 8 are wrapped outside the second armor layer 6 by utilizing a sheath extruder, and the flame-retardant optical cable is formed through cooling and shaping.
When the temperature change around the optical cable generates fire, the surface temperature of the flame-retardant outer sheath 7 rises rapidly, the color of the thermosensitive ribbon 8 changes rapidly, and the rapid inspection and fire extinguishing can be realized; meanwhile, after the temperature change is identified through the temperature sensing optical fiber 12, the optical signal in the temperature sensing optical fiber 12 is changed, the detector detects the optical signal and transmits the optical signal to a signal processor (such as a PLC (programmable logic controller), a singlechip and the like) for processing, and the processed data is sent into a fire alarm controller for early warning; when flame burns to the flame retardant tape 5, the adsorption layer 54 starts to adsorb surrounding smoke dust, if the flame burns to the flame retardant layer 53, the fire extinguishing capsule powder is affected by temperature and starts to release, flame spreading can be prevented, flame burning can be prevented by the flame retardant polyester tape, and the influence on the cable core 1 is reduced.
Example 1
As shown in fig. 1-2, the flame-retardant optical cable comprises a cable core 1, a first armor layer 2, an inner sheath 3, a water-resistant layer 4, a flame-retardant belt 5, a second armor layer 6 and a flame-retardant outer sheath 7 which are sequentially arranged from inside to outside, wherein a thermosensitive ribbon 8 is arranged on the flame-retardant outer sheath 7. The cable core 1 is externally longitudinally wrapped with the first armor layer 2 and then is extruded with the inner sheath 3, the inner sheath 3 is made of sheath materials containing ceramic oxidation-resistant materials, when flame burns to the inner sheath 3, the inner sheath 3 is completely burnt, the inner sheath is in a shell shape, interference of flame to the cable core 1 is reduced, the inner sheath 3 is externally provided with the water blocking layer 4, the water blocking layer 4 is provided with the flame retardant strip 5, the flame retardant strip 5 can play roles in slowing down the flame burning speed and locally extinguishing fire, and meanwhile, the flame retardant strip 5 is provided with the effect of adsorbing smoke dust generated after burning, the flame retardant outer sheath 7 and the thermosensitive ribbon 8 are extruded after the second armor layer 6 are longitudinally wrapped with the flame retardant strip 5, and the flame retardant outer sheath 7 is made of conventional polyvinyl chloride sheath materials.
In this embodiment, the communication unit includes six sleeve pipes 11, all is provided with six high temperature resistant optic fibre in every sleeve pipe 11, and the temperature sensing early warning unit includes a temperature sensing optic fibre 12, and temperature sensing optic fibre 12 sets up between two adjacent sleeve pipes 11, and temperature sensing optic fibre 12 passes through the detector and links to each other with signal processor, is convenient for realize the early warning function, and tensile unit 13 is the center reinforcement, adopts FRP to make.
In this embodiment, the overall thickness of the flame retardant tape 5 is 0.5mm to facilitate later lapping into a cable. The flame-retardant tape 5 comprises a flame-retardant layer 51, a heat-insulating layer 52, a flame-retardant layer 53 and an adsorption layer 54, wherein the flame-retardant layer 51 is a flame-retardant polyester tape, the thickness of the flame-retardant polyester tape is 0.1mm, the adsorption layer 54 is a graphene film, and the thickness of the adsorption layer 54 is 0.05mm.
The preparation steps of the flame retardant tape 5 include:
Firstly, carrying out primary melt blowing on a flame-retardant polyester belt to form a superfine fiber net structure, then uniformly spraying ceramic aerogel on the surface of the superfine fiber net structure to form a heat insulation layer 52, and coating the ceramic aerogel inside by using meshes of the superfine fiber net to play a role in fixing the ceramic aerogel; performing secondary melt-blowing on the surface of the heat insulation layer 52 to form a superfine fiber net structure, uniformly dispersing fire extinguishing capsule powder on the surface of the superfine fiber net structure to form a fire retarding layer 53, wherein the secondary melt-blowing can penetrate through the primary melt-blowing and can play a role in bonding the structures formed by the two melt-blowing; by uniformly spraying the hot melt adhesive adsorption layer 54 on the surface of the fire-retarding layer 53, a small amount of hot melt adhesive can penetrate through the superfine fiber net structure to fix the flame-retarding polyester belt.
The preparation raw materials of the thermal ribbon 8 comprise the following components in parts by weight:
5 parts of thermosensitive microcapsule, 22 parts of ethylene-vinyl acetate copolymer (EVA), 18 parts of polyolefin elastomer (POE), 13 parts of polyethylene, 10 parts of maleic anhydride grafted ethylene-1-octene copolymer, 4 parts of polyether amine modified polystyrene maleic anhydride, 7 parts of diethyl aluminum hypophosphite, 4 parts of aluminum hydroxide, 4 parts of magnesium hydroxide, 2 parts of expandable graphite, 3 parts of lubricant, 5 parts of silane coupling agent and 3 parts of antioxidant.
The preparation steps of the thermal ribbon 8 include:
(1) And (3) putting 5 parts of the thermosensitive microcapsule and 5 parts of the silane coupling agent into a grinder for mixing and grinding for 10min to obtain a mixed solution of the thermosensitive microcapsule and the silane coupling agent, adding 1 part of polyether amine modified polystyrene maleic anhydride into the mixed solution, putting the mixed solution into the grinder, and grinding until the granularity is smaller than 0.05mm to obtain the thermosensitive mixed solution. The polyether amine modified polystyrene maleic anhydride takes polystyrene maleic anhydride as a main chain, the polyether amine is taken as a side chain, and the water solubility of the polystyrene maleic anhydride is increased by introducing-NH 2 into the polyether amine to modify the polystyrene maleic anhydride. The polystyrene maleic anhydride introduces polyether amine long chain, plays a role in stabilizing dispersion by utilizing steric hindrance and electrostatic repulsion of molecules, can promote the uniformity of thermosensitive mixed liquid, and prevents precipitation and aggregation of the added thermosensitive microcapsules. Meanwhile, in the processing production process, a small amount of polyether amine modified polystyrene maleic anhydride is dehydrated and subjected to ring-closing imidization, an amide bond is converted into a rigid maleimide ring-closing structure, and the thermal stability of the polyether amine modified polystyrene maleic anhydride is improved. The polyether amine modified polystyrene maleic anhydride has good compatibility, and the compatibility of each component in the sheath material is improved by compounding the polyether amine modified polystyrene maleic anhydride and the maleic anhydride grafted ethylene-1-octene copolymer, and meanwhile, the thermosensitive ribbon 8 is tightly connected with the flame-retardant outer sheath 7, so that the thermosensitive ribbon is not easy to fall off.
(2) 22 Parts of ethylene-vinyl acetate copolymer (EVA), 18 parts of polyolefin elastomer (POE), 13 parts of polyethylene, 10 parts of maleic anhydride grafted ethylene-1-octene copolymer and 3 parts of lubricant are added into an internal mixer for internal mixing; then 7 parts of diethyl aluminum hypophosphite, 4 parts of aluminum hydroxide, 4 parts of magnesium hydroxide and 2 parts of expandable graphite are added for continuous banburying and mixing. Aluminum hydroxide, magnesium hydroxide and expandable graphite are compounded, so that the flame retardant property of the sheath material can be improved.
(3) Adding the thermosensitive mixed solution prepared in the step (1) into the mixture after the banburying in the step (2), uniformly stirring, adding 3 parts of polyether amine modified polystyrene maleic anhydride, uniformly stirring, adding 3 parts of antioxidant, and fully stirring for later use;
(4) And (3) conveying the material obtained in the step (3) into a double-screw extruder for melt extrusion, cooling and drying, and conveying the material into a granulator for granulating.
The preparation raw materials of the thermosensitive microcapsule comprise:
1 part of fluoran dye, 2.5 parts of bisphenol A, 5 parts of formaldehyde solution, 30 parts of cetyl alcohol, 57 parts of deionized water, 2 parts of melamine, 0.7 part of triethanolamine, 1 part of emulsifier, 0.3 part of nano boron oxide and 0.5 part of citric acid.
The preparation method of the thermosensitive microcapsule comprises the following steps:
(1) Magnetically stirring 1 part of fluoran dye, 2.5 parts of bisphenol A and 30 parts of hexadecanol at 80 ℃ for 30min to prepare a color-changing compound;
(2) Mixing and stirring 10 parts of deionized water, 5 parts of formaldehyde solution and 2 parts of melamine, uniformly stirring, adding 0.3 part of triethanolamine, and adjusting the pH of the solution to 8 to form a mixed solution A; placing the mixed solution A at 70 ℃ for heat preservation for 1h;
(3) Performing ultrasonic treatment on 0.3 part of nano boron oxide for 30min, and adding the nano boron oxide into the mixed solution A to form a shell material prepolymer mixed solution;
(4) Mixing and stirring 1 part of emulsifier and 15 parts of deionized water, adding a color-changing compound, and emulsifying for 8min at 65 ℃; then adding the shell material prepolymer mixed solution, mixing and stirring, then dropwise adding 0.5 part of citric acid, adjusting the pH value to 5, and reacting for 2 hours; after the reaction is finished, 0.4 part of triethanolamine is added dropwise, the pH is continuously adjusted until the solution is neutral, 32 parts of deionized water is added for washing and drying after cooling, and finally the needed thermosensitive microcapsule is obtained.
The polyether amine modified polystyrene maleic anhydride is prepared from the following raw materials:
3 parts of polyetheramine, 8 parts of polystyrene maleic anhydride, 12 parts of dimethylformamide and 77 parts of deionized water.
The preparation method of the polyether amine modified polystyrene maleic anhydride comprises the following steps:
(1) Mixing 8 parts of polystyrene maleic anhydride with 12 parts of dimethylformamide, and magnetically stirring for 10min at the temperature of 28 ℃ to prepare a polystyrene maleic anhydride mixed solution;
(2) Adding 3 parts of polyetheramine into a polytetrafluoroethylene lining high-pressure reaction kettle, keeping the temperature at 50 ℃ for 4 hours, adding polystyrene maleic anhydride mixed solution, and keeping the temperature at 50 ℃ for 1 hour to prepare polyetheramine modified polystyrene maleic anhydride mixed solution;
(3) And (3) cooling the polyether amine modified polystyrene maleic anhydride mixed solution, adding 77 parts of deionized water for washing, and drying to obtain the required polyether amine modified polystyrene maleic anhydride.
A preparation method of a flame-retardant optical cable comprises the following steps:
1) Placing a plurality of high-temperature-resistant optical fibers on a pay-off rack, setting the temperature of a sleeve extruder to 240 ℃, threading the optical fibers (the high-temperature-resistant optical fibers) into the sleeve extruder, and forming six sleeves 11 through conventional procedures such as filling optical fiber ointment, cooling the sleeves, drawing and winding up the wires, wherein six high-temperature-resistant optical fibers are arranged in each sleeve 11;
2) Respectively placing a tensile unit 13, six sleeves 11 and a temperature sensing optical fiber 12 on a pay-off rack, paying off, entering a cabling twisting table for SZ twisting, and forming a cable core 1 through conventional procedures such as cable core yarn bundling fixation, tractor wire winding and the like;
3) Placing the cable core 1 on a pay-off rack, paying off the cable core 1, performing metal composite strip binding longitudinal wrapping to form a first armor layer 2, wrapping an inner sheath 3 outside the first armor layer 2 through a sheath extruding machine, extruding the inner sheath at 200 ℃, and performing cooling and shaping; then enters a water blocking tape wrapping machine, and a water blocking layer 4 is formed outside the inner sheath 3; forming a flame-retardant belt 5 outside the water-resistant layer 4, and then performing metal composite belt binding longitudinal wrapping to form a second armor layer 6; the extrusion temperatures of the flame-retardant outer sheath 7 and the thermal ribbon 8 are set to be 200 ℃ respectively by adopting a sheath double-layer coextrusion process, the flame-retardant outer sheath 7 and the thermal ribbon 8 are wrapped outside the second armor layer 6 by utilizing a sheath extruder, and the flame-retardant optical cable is formed through cooling and shaping.
When the temperature change around the optical cable generates fire, the surface temperature of the flame-retardant outer sheath 7 rises rapidly, the color of the thermosensitive ribbon 8 changes rapidly, and the rapid inspection and fire extinguishing can be realized; meanwhile, after the temperature change is identified through the temperature sensing optical fiber 12, the optical signal in the temperature sensing optical fiber 12 is changed, the detector detects the optical signal and transmits the optical signal to a signal Processor (PLC) for processing, and the processed data is sent into a fire alarm controller for early warning; when flame burns to the flame retardant tape 5, the adsorption layer 54 starts to adsorb surrounding smoke dust, if the flame burns to the flame retardant layer 53, the fire extinguishing capsule powder is affected by temperature and starts to release, flame spreading can be prevented, flame burning can be prevented by the flame retardant polyester tape, and the influence on the cable core 1 is reduced.
Parts or structures of the present invention, which are not specifically described, may be existing technologies or existing products, and are not described herein.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (10)
1. The utility model provides a fire-retardant optical cable, its characterized in that includes cable core, first armor, inner sheath, water-blocking layer, fire-retardant area, second armor and the fire-retardant oversheath that sets gradually from inside to outside, be provided with the thermal-sensitive color ribbon on the fire-retardant oversheath.
2. The flame-retardant optical cable according to claim 1, wherein the cable core comprises a communication unit, a temperature sensing early warning unit and a tensile unit, and the cable core is formed by twisting the communication unit, the temperature sensing early warning unit and the tensile unit.
3. The flame-retardant optical cable according to claim 2, wherein the tensile unit is arranged at the central position of the cable core, and the communication unit and the temperature-sensing early-warning unit are arranged at the periphery of the tensile unit.
4. The flame-retardant optical cable according to claim 2, wherein the communication unit comprises a plurality of sleeves, a plurality of high-temperature-resistant optical fibers are arranged in the sleeves, the temperature-sensing early-warning unit comprises a plurality of temperature-sensing optical fibers, the temperature-sensing optical fibers are arranged outside the sleeves, and the temperature-sensing optical fibers are connected with the signal processor through the detector.
5. A flame retardant optical cable according to claim 1, wherein the thickness of the flame retardant tape is 0.3-0.5mm, the flame retardant tape comprises a flame retardant layer, a heat insulating layer, a flame retardant layer and an adsorption layer, the thickness of the flame retardant layer is 0.25-0.1mm, and the thickness of the adsorption layer is 0.02-0.05mm.
6. The flame-retardant optical cable according to claim 1, wherein the raw materials for preparing the thermosensitive ribbon comprise:
5-7 parts of thermosensitive microcapsule, 20-23 parts of ethylene-vinyl acetate copolymer, 15-18 parts of polyolefin elastomer, 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer, 2-4 parts of polyether amine modified polystyrene maleic anhydride, 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide, 2-4 parts of expandable graphite, 2-3 parts of lubricant, 3-5 parts of silane coupling agent and 2-3 parts of antioxidant.
7. The flame-retardant optical cable of claim 6, wherein the step of preparing the thermal ribbon comprises:
(1) 5-7 parts of thermosensitive microcapsules and 3-5 parts of silane coupling agent are put into a grinder for mixed grinding for 10-20min, so as to obtain mixed liquid of the thermosensitive microcapsules and the silane coupling agent, 0.5-1 part of polyether amine modified polystyrene maleic anhydride is added into the mixed liquid, and the mixed liquid is put into the grinder and ground until the granularity is less than 0.05mm, so that thermosensitive mixed liquid is obtained;
(2) Adding 20-23 parts of ethylene-vinyl acetate copolymer, 15-18 parts of polyolefin elastomer, 10-13 parts of polyethylene, 8-10 parts of maleic anhydride grafted ethylene-1-octene copolymer and 2-3 parts of lubricant into an internal mixer for internal mixing; adding 4-7 parts of diethyl aluminum hypophosphite, 3-5 parts of aluminum hydroxide, 3-5 parts of magnesium hydroxide and 2-4 parts of expandable graphite, and continuously banburying and mixing;
(3) Adding the thermosensitive mixed solution prepared in the step (1) into the mixture after the banburying in the step (2), uniformly stirring, adding the rest parts by weight of polyether amine modified polystyrene maleic anhydride, uniformly stirring, adding 2-3 parts of antioxidant, and fully stirring for later use;
(4) And (3) conveying the material obtained in the step (3) into a double-screw extruder for melt extrusion, cooling and drying, and conveying the material into a granulator for granulating.
8. The flame-retardant optical cable according to claim 6, wherein the polyether amine modified polystyrene maleic anhydride is prepared from the following raw materials:
2-3 parts of polyether amine, 8-10 parts of polystyrene maleic anhydride, 12-14 parts of dimethylformamide and 73-78 parts of deionized water.
9. The flame retardant fiber optic cable of claim 8, wherein said polyetheramine modified polystyrene maleic anhydride preparing step comprises:
(1) Mixing 8-10 parts of polystyrene maleic anhydride with 12-14 parts of dimethylformamide, and magnetically stirring for 10-15min at the temperature of 23-28 ℃ to prepare polystyrene maleic anhydride mixed solution;
(2) Adding 2-3 parts of polyetheramine into a polytetrafluoroethylene lining high-pressure reaction kettle, keeping the temperature at 50-60 ℃ for 4-5 hours, adding a polystyrene maleic anhydride mixed solution, and keeping the temperature at 50-60 ℃ for 1-1.5 hours to prepare a polyetheramine modified polystyrene maleic anhydride mixed solution;
(3) And cooling the polyether amine modified polystyrene maleic anhydride mixed solution, adding 73-78 parts of deionized water for washing, and drying to obtain the required polyether amine modified polystyrene maleic anhydride.
10. A flame retardant optical cable according to claim 6, wherein said thermosensitive microcapsule is prepared from the following raw materials:
1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A, 4-8 parts of formaldehyde solution, 25-30 parts of hexadecanol, 55-60 parts of deionized water, 2-3 parts of melamine, 0.5-1 part of triethanolamine, 0.5-1 part of emulsifier, 0.2-0.5 part of nano boron oxide and 0.3-0.5 part of citric acid;
The preparation method of the thermosensitive microcapsule comprises the following steps:
(1) Magnetically stirring 1-1.5 parts of fluoran dye, 1.5-2.5 parts of bisphenol A and 25-30 parts of hexadecanol at 80-90 ℃ for 25-30min to prepare a color-changing compound;
(2) Mixing and stirring 5-10 parts of deionized water, 4-8 parts of formaldehyde solution and 2-3 parts of melamine, adding 0.2-0.5 part of triethanolamine after uniformly stirring, and adjusting the pH of the solution to 8-9 to form a mixed solution A; placing the mixed solution A at 65-70 ℃ for heat preservation for 1-1.5h;
(3) Performing ultrasonic treatment on 0.2-0.5 part of nano boron oxide for 30-35min, and adding the nano boron oxide into the mixed solution A to form a shell material prepolymer mixed solution;
(4) Mixing 0.5-1 part of emulsifier and 10-20 parts of deionized water, stirring, adding the color-changing compound, and emulsifying at 65-70deg.C for 8-12min; then adding the shell material prepolymer mixed solution, mixing and stirring, then dripping 0.3-0.5 part of citric acid, adjusting the pH value to 4-5, and reacting for 2-3 hours; after the reaction is finished, dropwise adding the rest weight parts of triethanolamine, and continuously adjusting the pH value until the solution is neutral; and then adding the rest parts by weight of deionized water for washing and drying after cooling, and finally obtaining the needed thermosensitive microcapsule.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102176360A (en) * | 2011-02-22 | 2011-09-07 | 深圳市长园维安电子有限公司 | PTC thermistor and substrate applied therein and manufacturing method thereof |
| CN104681222A (en) * | 2015-02-04 | 2015-06-03 | 上海长园维安电子线路保护有限公司 | Novel PTC thermosensitive element |
| CN111134409A (en) * | 2020-01-21 | 2020-05-12 | 翁秋梅 | Self-adaptive clothes |
| CN210722558U (en) * | 2018-11-02 | 2020-06-09 | 江苏亨通电力电缆有限公司 | Medium-voltage fireproof cable for intelligent early warning communication |
| CN218730059U (en) * | 2022-11-02 | 2023-03-24 | 山东阳谷昊辉电缆有限公司 | Mineral insulation aluminum sheath photoelectric composite fireproof cable |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176360A (en) * | 2011-02-22 | 2011-09-07 | 深圳市长园维安电子有限公司 | PTC thermistor and substrate applied therein and manufacturing method thereof |
| CN104681222A (en) * | 2015-02-04 | 2015-06-03 | 上海长园维安电子线路保护有限公司 | Novel PTC thermosensitive element |
| CN210722558U (en) * | 2018-11-02 | 2020-06-09 | 江苏亨通电力电缆有限公司 | Medium-voltage fireproof cable for intelligent early warning communication |
| CN111134409A (en) * | 2020-01-21 | 2020-05-12 | 翁秋梅 | Self-adaptive clothes |
| CN218730059U (en) * | 2022-11-02 | 2023-03-24 | 山东阳谷昊辉电缆有限公司 | Mineral insulation aluminum sheath photoelectric composite fireproof cable |
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