CN107424667B - Halogen-free flame-retardant fire-resistant cable and preparation method thereof - Google Patents
Halogen-free flame-retardant fire-resistant cable and preparation method thereof Download PDFInfo
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- CN107424667B CN107424667B CN201710623272.0A CN201710623272A CN107424667B CN 107424667 B CN107424667 B CN 107424667B CN 201710623272 A CN201710623272 A CN 201710623272A CN 107424667 B CN107424667 B CN 107424667B
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 113
- 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 102
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 144
- 238000011049 filling Methods 0.000 claims abstract description 64
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 60
- 239000004020 conductor Substances 0.000 claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052802 copper Inorganic materials 0.000 claims abstract description 43
- 239000010949 copper Substances 0.000 claims abstract description 43
- 229920000098 polyolefin Polymers 0.000 claims abstract description 29
- 239000000779 smoke Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims description 39
- 239000000843 powder Substances 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 15
- 239000003365 glass fiber Substances 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 14
- 239000010445 mica Substances 0.000 claims description 12
- 229910052618 mica group Inorganic materials 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052573 porcelain Inorganic materials 0.000 claims description 10
- 239000012752 auxiliary agent Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000378 calcium silicate Substances 0.000 claims description 8
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 8
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 8
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000391 magnesium silicate Substances 0.000 claims description 5
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 5
- 235000019792 magnesium silicate Nutrition 0.000 claims description 5
- 239000004964 aerogel Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 229910000166 zirconium phosphate Inorganic materials 0.000 claims description 4
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052916 barium silicate Inorganic materials 0.000 claims description 3
- HMOQPOVBDRFNIU-UHFFFAOYSA-N barium(2+);dioxido(oxo)silane Chemical compound [Ba+2].[O-][Si]([O-])=O HMOQPOVBDRFNIU-UHFFFAOYSA-N 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- IQYKECCCHDLEPX-UHFFFAOYSA-N chloro hypochlorite;magnesium Chemical compound [Mg].ClOCl IQYKECCCHDLEPX-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229920000734 polysilsesquioxane polymer Polymers 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- RLQWHDODQVOVKU-UHFFFAOYSA-N tetrapotassium;silicate Chemical compound [K+].[K+].[K+].[K+].[O-][Si]([O-])([O-])[O-] RLQWHDODQVOVKU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- 238000002485 combustion reaction Methods 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 16
- 238000001125 extrusion Methods 0.000 description 11
- 229920001971 elastomer Polymers 0.000 description 8
- 239000004945 silicone rubber Substances 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 229910000018 strontium carbonate Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
-
- 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
-
- 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
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- 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
-
- 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
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention provides a halogen-free flame-retardant fire-resistant cable and a preparation method thereof. The halogen-free flame-retardant fire-resistant cable provided by the invention comprises a copper conductor, a ceramic flame-retardant silicon rubber insulating layer, an A-level non-combustible ceramic filling layer, a fireproof heat-insulating wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath, wherein the ceramic flame-retardant silicon rubber insulating layer, the A-level non-combustible ceramic filling layer, the fireproof heat-insulating wrapping layer and the low-smoke halogen-free flame-retardant polyolefin sheath are sequentially coated outside the copper conductor. According to the halogen-free flame-retardant fire-resistant cable provided by the invention, the A-level non-combustible ceramic filling layer and the fireproof heat-insulating wrapping layer are introduced into the structure, so that the ceramic fire-resistant function and the fireproof fire-retardant function are organically combined, and finally, the excellent fire-resistant performance of the cable is endowed, and meanwhile, the flame-retardant performance of the cable is obviously superior to that of a conventional flame-retardant fire-resistant cable.
Description
Technical Field
The invention relates to the technical field of electrical elements, in particular to a halogen-free flame-retardant fire-resistant cable and a preparation method thereof.
Background
In order to cope with the severe electric fire situation, a more reasonable and stricter judgment method is adopted for the combustion performance grading criterion of the electric wires and the cables in China, a new mandatory national standard GB 31247-2014 for grading the combustion performance of the cables and the optical cables is issued and implemented, and higher requirements are put forward on the fireproof and flame-retardant performance of the cables and the optical cables.
The performance of the fire-resistant cable is directly related to whether the fire-fighting electric equipment can normally start to work in a fire disaster. The refractory cables widely used at home and abroad at present mainly comprise magnesia mineral insulated cables and mica tape wrapped refractory cables. The magnesium oxide mineral insulated cable has high production cost, complex process and equipment, no flexibility of the cable and limited length by production equipment, so that the joint has complex multi-laying procedures, the magnesium oxide is easy to chemically react with water in the air to generate conductive magnesium hydroxide, and the power supply capacity of the cable is easy to be reduced. The mica tape is wrapped fire-resistant cable is flexible, but needs multilayer to wrap the mica tape, production speed is slow and equipment and process have been increased, receive the unstable influence of mica tape self quality, fire resistance of cable is also unstable inadequately, organic glue becomes the carbonization layer in the mica tape insulating layer after catching fire moreover, meet water and electrically conduct, if buckle many times in the cable laying construction can lead to the mica sheet layer to drop from the glued basic unit of mica tape and make the insulating layer destroy, the power supply ability of cable is impaired, can short circuit outage even. Therefore, development of fire-resistant insulating materials and fire-resistant cables with excellent fire resistance and good processability has become a necessary trend for fire-fighting technology and social development.
The range of applications for silicone rubber is very wide. The material is not only used as a special material for aviation, advanced technology and military technical departments, but also used for various departments of national economy, and the application range of the material is expanded to: building, electronics and electricity, textile, automobile, machinery, leather papermaking, chemical light industry, metal, paint, medicine and medical treatment and other fields. Ceramic fire resistant silicone rubber cables were successfully developed and commercially used in australia in 2004. When the ceramic fire-resistant silicone rubber is used for a cable insulating layer or a sheath layer, the ceramic fire-resistant silicone rubber has good tensile strength, higher flexibility and elongation at break, and better fire resistance and insulating property, however, the ceramic fire resistance and the fire resistance of the ceramic fire-resistant silicone rubber are contradictory, namely after the conventional halogen-free fire retardant is added, the ceramic fire resistance of the product is reduced and lost, and the ceramic fire resistance and the fire resistance of the cable are conflicting.
Disclosure of Invention
The invention aims to provide a halogen-free flame-retardant fire-resistant cable and a preparation method thereof. The halogen-free flame-retardant fire-resistant cable provided by the invention not only has an excellent ceramic fire-resistant function, but also has the fireproof flame-retardant performance reaching the highest combustion performance grade (grade A), and solves the problem that the ceramic material for the cable is contradictory in flame retardance and fire resistance.
The invention provides a halogen-free flame-retardant fire-resistant cable, which comprises a copper conductor, a ceramic flame-retardant silicon rubber insulating layer, an A-level non-combustible ceramic filling layer, a fireproof heat-insulating wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath, wherein the ceramic flame-retardant silicon rubber insulating layer, the A-level non-combustible ceramic filling layer, the fireproof heat-insulating wrapping layer and the low-smoke halogen-free flame-retardant polyolefin sheath are sequentially coated outside the copper conductor.
Preferably, the A-level nonflammable ceramic filling layer comprises the following components in parts by mass: 100 parts of porcelain powder, 60-150 parts of adhesive and 1-50 parts of nano reinforcing auxiliary agent.
Preferably, the ceramic powder comprises one or more of kaolin, talc, mica powder, strontium carbonate, magnesium silicate, aluminum silicate, calcium silicate, zirconium silicate, barium sulfate, aluminum oxide, calcium oxide, zirconium oxide, magnesium oxide and zinc oxide.
Preferably, the adhesive comprises one or more of magnesium oxychloride cement-based adhesive, composite phosphosilicate inorganic adhesive, lithium water glass, sodium water glass and potassium water glass.
Preferably, the nano reinforcing auxiliary agent comprises one or more of nano montmorillonite, nano silicon dioxide, carbon nano tube, nano layered double hydroxide, nano zirconium phosphate, polysilsesquioxane and graphene oxide.
Preferably, the thickness of the A-level nonflammable ceramic filling layer is 1-10 mm higher than the outer surface of the insulating layer.
Preferably, the fireproof heat-insulating wrapping layer comprises one of a nano aerogel felt, a glass fiber cloth composite ceramic fiber felt, a basalt fiber felt and a glass fiber cloth.
Preferably, when the fireproof heat-insulating wrapping layer is glass fiber cloth, the number of layers of the glass fiber cloth is more than two.
Preferably, the thickness of the fireproof heat-insulating wrapping layer is 1-5 mm.
The invention provides a preparation method of the halogen-free flame-retardant fire-resistant cable, which comprises the following steps:
(1) Extruding ceramic fire-resistant silicon rubber insulating material on the surface of the copper conductor to form a ceramic fire-resistant silicon rubber insulating layer coated on the surface of the copper conductor;
(2) Extruding a class A nonflammable ceramic filling material from the outer surface of the ceramic fire-resistant silicon rubber insulating layer in the step (1) to form a class A nonflammable ceramic filling layer coated on the surface of the ceramic fire-resistant silicon rubber insulating layer;
(3) The surface of the A-level incombustible ceramic filling layer in the step (2) is wrapped with a fireproof heat-insulating wrapping layer;
(4) And (3) extruding a low-smoke halogen-free flame-retardant polyolefin material on the surface of the fireproof heat-insulating wrapping layer in the step (3) to obtain the halogen-free flame-retardant cable.
The halogen-free flame-retardant fire-resistant cable provided by the invention comprises a copper conductor, a ceramic flame-retardant silicon rubber insulating layer, an A-level non-combustible ceramic filling layer, a fireproof heat-insulating wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath, wherein the ceramic flame-retardant silicon rubber insulating layer, the A-level non-combustible ceramic filling layer, the fireproof heat-insulating wrapping layer and the low-smoke halogen-free flame-retardant polyolefin sheath are sequentially coated outside the copper conductor. According to the halogen-free flame-retardant fire-resistant cable provided by the invention, the A-level non-combustible ceramic filling layer and the fireproof heat-insulating wrapping layer are introduced into the structure, so that the ceramic fire-resistant function and the fireproof fire-retardant function are organically combined, and finally, the excellent fire-resistant performance of the cable is endowed, and meanwhile, the flame-retardant performance of the cable is obviously superior to that of a conventional flame-retardant fire-resistant cable. Experimental results show that the integrity of the halogen-free flame-retardant fire-resistant cable line provided by the invention is detected according to GB/T19216.21-2003 [ 21 st part of test step and requirement of line integrity test of cables or optical cables under flame condition ] -rated voltage 0.6/1.0kV and below ], and meets the standard regulation requirement; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Drawings
FIG. 1 is a schematic structural view of a halogen-free flame retardant fire resistant cable according to example 1 of the present invention; wherein 1 is copper conductor, 2 is ceramic fire-resistant silicon rubber insulating layer, 3 is A-level incombustible ceramic filling layer, 4 is fire-proof heat-insulating wrapping layer, 5 is low smoke zero halogen flame-retardant polyolefin sheath.
Detailed Description
The invention provides a halogen-free flame-retardant fire-resistant cable, which comprises a copper conductor, a ceramic flame-retardant silicon rubber insulating layer, an A-level non-combustible ceramic filling layer, a fireproof heat-insulating wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath, wherein the ceramic flame-retardant silicon rubber insulating layer, the A-level non-combustible ceramic filling layer, the fireproof heat-insulating wrapping layer and the low-smoke halogen-free flame-retardant polyolefin sheath are sequentially coated outside the copper conductor.
The halogen-free flame-retardant fire-resistant cable provided by the invention comprises a copper conductor. The diameter and the number of the copper conductors are not particularly limited, and the copper conductors can be selected according to the specification of the cable. In the invention, the number of copper conductors in the single halogen-free flame-retardant fire-resistant cable is preferably 1-3. In the present invention, when the number of the copper conductors is plural, the copper conductors are preferably arranged in parallel in the halogen-free flame retardant fire-resistant cable.
The material and source of the copper conductor are not particularly limited, and the copper conductor for a commercial cable known to those skilled in the art may be used.
The halogen-free flame-retardant fireproof cable provided by the invention comprises a ceramic fireproof silicon rubber insulating layer coated outside the copper conductor. The thickness of the ceramic fireproof silicon rubber insulating layer is not particularly limited, and the ceramic fireproof silicon rubber insulating layer is selected according to the specification of the cable. In the present invention, when the number of copper conductors in the halogen-free flame retardant fire-resistant cable is plural, it is preferable that each copper conductor is covered with a ceramic fire-resistant silicone rubber insulating layer on the surface thereof, so as to insulate the copper conductors from each other. In the invention, the ceramic refractory silicon rubber insulating layer insulates the copper conductor from the outside.
The material of the ceramic fire-resistant silicon rubber insulating layer is not particularly limited, and ceramic fire-resistant silicon rubber insulating materials for commercial cables, which are well known to those skilled in the art, can be adopted.
The halogen-free flame-retardant fireproof cable provided by the invention comprises an A-level nonflammable ceramic filling layer coated outside the ceramic fireproof silicon rubber insulating layer. In the invention, the A-level nonflammable ceramic filling layer preferably comprises the following components in parts by mass: 100 parts of porcelain powder, 60-150 parts of adhesive and 1-50 parts of nano reinforcing auxiliary agent.
In the invention, the class A nonflammable ceramic filling layer preferably comprises 100 parts by weight of ceramic powder. In the present invention, the porcelain powder preferably includes one or more of kaolin, talc, mica powder, strontium carbonate, magnesium silicate, aluminum silicate, calcium silicate, zirconium silicate, barium sulfate, aluminum oxide, calcium oxide, zirconium oxide, magnesium oxide and zinc oxide, more preferably 2 to 3 kinds. In an embodiment of the present invention, the porcelain powder is preferably a mixture of aluminum oxide and calcium silicate, a mixture of mica powder, barium silicate and zirconium oxide, a mixture of magnesium silicate and calcium silicate, or a mixture of aluminum silicate and calcium oxide. When the porcelain powder includes a mixture of plural kinds, the proportion of each component of the porcelain powder is not particularly limited, and may be blended in any proportion.
In the present invention, the particle diameter of the porcelain powder is preferably 0.1 to 100. Mu.m, more preferably 0.2 to 50. Mu.m, most preferably 0.5 to 25. Mu.m. The source of the porcelain powder is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the ceramic powder makes the A-level nonflammable ceramic filling layer ceramic in flame to achieve flame retardant effect.
In the invention, the A-level nonflammable ceramic filling layer preferably comprises 60 to 150 parts by weight of an adhesive, more preferably 80 to 130 parts by weight, and most preferably 100 to 110 parts by weight of the ceramic powder based on 100 parts by weight of the ceramic powder. In the present invention, the adhesive preferably includes one or more of magnesium oxychloride cement-based adhesive, composite phosphosilicate inorganic adhesive, lithium water glass, sodium water glass and potassium water glass. The source of the adhesive is not particularly limited, and commercially available products known to those skilled in the art can be used.
In the invention, the A-level nonflammable ceramic filling layer preferably comprises 1 to 50 parts by weight, more preferably 10 to 40 parts by weight, most preferably 20 to 30 parts by weight of nano reinforcing auxiliary agent based on 100 parts by weight of ceramic powder. In the present invention, the nano reinforcing auxiliary agent preferably includes one or more of nano montmorillonite, nano silica, carbon nanotube, nano layered double hydroxide, nano zirconium phosphate, polysilsesquioxane and graphene oxide. In the present invention, when the nano reinforcing auxiliary includes a mixture of a plurality of kinds, the proportion of each component of the nano reinforcing auxiliary is not particularly limited, and may be blended in any proportion.
In the present invention, the particle diameter of the nano reinforcing auxiliary is preferably 1 to 100nm, more preferably 2 to 50nm, and most preferably 5 to 20nm. The source of the nano reinforcing auxiliary agent is not particularly limited, and commercially available products well known to those skilled in the art can be used. In the invention, the nano reinforcing auxiliary agent can play roles of flame retarding synergism and improving ceramic property.
In the present invention, the thickness of the class a nonflammable ceramic filling layer is preferably 1 to 10mm higher than the outer surface of the insulating layer, more preferably 2 to 5mm higher than the outer surface of the insulating layer. In the invention, when the number of copper conductors in the halogen-free flame-retardant fireproof cable is multiple, the copper conductors coated with the ceramic fireproof silicon rubber insulating layer are preferably integrally coated by the A-level nonflammable ceramic filling layer to form a single cable structure. In the invention, the A-level nonflammable ceramic filling layer not only has excellent ceramic fireproof function, but also has the fireproof and flame-retardant performance reaching the highest combustion performance level (A-level), and solves the problem that the ceramic material for the cable is contradictory between flame retardance and fire resistance.
The halogen-free flame-retardant fire-resistant cable provided by the invention comprises a fireproof heat-insulating wrapping layer which is wrapped outside the A-level non-combustible ceramic filling layer. In the invention, the fireproof heat-insulating wrapping layer preferably comprises one of a nano aerogel felt, a glass fiber cloth composite ceramic fiber felt, a basalt fiber felt and a glass fiber cloth. In the present invention, when the fire-proof heat-insulating wrapping layer is a glass fiber cloth, the number of layers of the glass fiber cloth is preferably two or more, more preferably 3 to 6.
In the present invention, the thickness of the fire-proof heat-insulating wrapping layer is preferably 1 to 5mm, more preferably 2 to 4mm. The source of the fire-proof heat-insulating wrapping layer is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. According to the invention, the fireproof heat-insulating wrapping layer is matched with the A-level nonflammable ceramic filling layer, the ceramic fireproof function and the fireproof flame-retardant function are organically combined, and finally, the excellent fireproof performance of the cable is endowed, and meanwhile, the flame-retardant performance of the cable is obviously superior to that of a conventional flame-retardant fireproof cable.
The halogen-free flame-retardant fire-resistant cable provided by the invention comprises a low-smoke halogen-free flame-retardant polyolefin sheath coated outside the fireproof heat-insulating wrapping layer. The thickness of the low-smoke halogen-free flame-retardant polyolefin sheath is not particularly limited, and the low-smoke halogen-free flame-retardant polyolefin sheath can be adjusted according to the specification of the cable. In the invention, the material of the low-smoke halogen-free flame-retardant polyolefin sheath is not particularly limited, and the low-smoke halogen-free flame-retardant polyolefin material well known to the person skilled in the art can be adopted. In the invention, the low smoke zero halogen flame retardant polyolefin sheath has the functions of flame retardance and water resistance.
According to the halogen-free flame-retardant fire-resistant cable provided by the invention, the A-level non-combustible ceramic filling layer and the fireproof heat-insulating wrapping layer are introduced into the structure, so that the ceramic fire-resistant function and the fireproof fire-retardant function are organically combined, and finally, the excellent fire resistance of the cable is endowed, and meanwhile, the flame resistance of the cable is obviously superior to that of a conventional flame-retardant fire-resistant cable, and the halogen-free flame-retardant fire-resistant cable has the characteristics of no halogen, no toxicity, high flame resistance, fire resistance, environmental friendliness and the like.
The invention also provides a preparation method of the halogen-free flame-retardant fire-resistant cable, which comprises the following steps:
(1) Extruding ceramic fire-resistant silicon rubber insulating material on the surface of the copper conductor to form a ceramic fire-resistant silicon rubber insulating layer coated on the surface of the copper conductor;
(2) Extruding a class A nonflammable ceramic filling material from the outer surface of the ceramic fire-resistant silicon rubber insulating layer in the step (1) to form a class A nonflammable ceramic filling layer coated on the surface of the ceramic fire-resistant silicon rubber insulating layer;
(3) The surface of the A-level incombustible ceramic filling layer in the step (2) is wrapped with a fireproof heat-insulating wrapping layer;
(4) And (3) extruding a low-smoke halogen-free flame-retardant polyolefin material on the surface of the fireproof heat-insulating wrapping layer in the step (3) to obtain the halogen-free flame-retardant cable.
According to the invention, the ceramic fireproof silicon rubber insulating material is extruded on the surface of the copper conductor, so that the ceramic fireproof silicon rubber insulating layer coated on the surface of the copper conductor is formed. The operation of extruding the ceramic fire-resistant silicon rubber insulating material is not particularly limited, and the technical scheme of extruding the rubber material, which is well known to the person skilled in the art, can be adopted. In the present invention, the extrusion of the ceramic fire-resistant silicone rubber insulation is preferably performed in a rubber extruder.
After the extrusion of the ceramic refractory silicon rubber insulating material is completed, the extruded product is preferably vulcanized to obtain the ceramic refractory silicon rubber insulating layer coated on the surface of the copper conductor. In the present invention, the temperature of the vulcanization is preferably 140 to 300 ℃, more preferably 160 to 250 ℃, and most preferably 180 to 220 ℃. The vulcanizing device is not particularly limited, and a vulcanizing device known to those skilled in the art may be used. In the present invention, the vulcanization is preferably carried out in a hot vulcanizer.
After the ceramic fire-resistant silicon rubber insulating layer is obtained, the A-level nonflammable ceramic filling material is extruded out of the outer surface of the ceramic fire-resistant silicon rubber insulating layer to form the A-level nonflammable ceramic filling layer coated on the surface of the ceramic fire-resistant silicon rubber insulating layer. The preparation method of the A-level nonflammable ceramic filling material is not particularly limited, and the components of the A-level nonflammable ceramic filling layer are mixed by adopting a method for preparing a mixture material which is well known to a person skilled in the art. In the present invention, the mixing time is preferably 10 to 30 minutes, more preferably 15 to 25 minutes. In the present invention, the preparation of the class A incombustible ceramic filler is preferably carried out in a kneader or an internal mixer.
In the present invention, the extrusion of the class a incombustible ceramic filler material is preferably performed in a twin screw extruder; the screw speed of the twin-screw extruder is preferably 20 to 200rpm, more preferably 50 to 150rpm, and most preferably 80 to 120rpm.
After the A-level incombustible ceramic filling layer is obtained, the surface of the A-level incombustible ceramic filling layer is wrapped with the fireproof heat-insulating wrapping layer. The invention is not particularly limited in the wrapping operation, and the fireproof heat-insulating wrapping layer can be coated on the surface of the A-level nonflammable ceramic filling layer.
After the fireproof heat-insulating wrapping layer is obtained, the low-smoke halogen-free flame-retardant polyolefin material is extruded on the surface of the fireproof heat-insulating wrapping layer, and the halogen-free flame-retardant cable is obtained. The extrusion operation of the low smoke halogen-free flame retardant polyolefin material is not particularly limited, and a melt extrusion method well known to those skilled in the art can be adopted.
The preparation method of the halogen-free flame-retardant fire-resistant cable provided by the invention is simple and convenient, is easy to control and realize industrial production, does not need to add new production equipment additionally for cable enterprises, and does not generate corrosive gas and waste in the production process.
For further explanation of the present invention, the halogen-free flame retardant fire resistant cable and the preparation method thereof provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 140 ℃.
Step 2: 80 parts of alumina, 20 parts of calcium silicate, 60 parts of potash water glass and 1 part of nano montmorillonite are weighed according to the parts by weight, added into a kneader, and mixed for 10 minutes to prepare the A-level nonflammable ceramic filling material.
Step 3: and (2) adding the grade-A non-combustible ceramic filling material prepared in the step (2) into a hopper of a screw extruder, controlling the rotation speed of the screw to be 200rpm, extruding and coating the material onto the conductor coated with the ceramic refractory silicon rubber insulating layer prepared in the step (1), and simultaneously wrapping the material with the fireproof heat-insulating wrapping layer nano aerogel felt outside.
Step 4: and (3) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (3) through melt extrusion.
The schematic structural diagram of the halogen-free flame-retardant fire-resistant cable prepared in the embodiment is shown in fig. 1, and the halogen-free flame-retardant fire-resistant cable comprises three copper conductors 1, a ceramic fire-resistant silicon rubber insulating layer 2 coated outside the copper conductors, an A-level non-combustible ceramic filling layer 3 coated outside the ceramic fire-resistant silicon rubber insulating layer 2, a fireproof heat-insulating wrapping layer 4 coated outside the A-level non-combustible ceramic filling layer 3, and a low-smoke halogen-free flame-retardant polyolefin sheath 5 coated outside the fireproof heat-insulating wrapping layer 4.
In the halogen-free flame-retardant fire-resistant cable prepared by the embodiment, the thickness of the A-level non-inflammable ceramic filling layer is 5mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 3mm.
The preparation method comprises the following steps: the line integrity is detected according to GB/T19216.21-2003, the 21 st part of the test steps and requirements of the line integrity test of cables or optical cables under flame conditions, namely the rated voltage of 0.6/1.0kV and below, and meets the standard regulation requirements; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Example 2:
step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 300 ℃.
Step 2: 40 parts of mica powder, 40 parts of barium silicate, 20 parts of zirconia, 150 parts of sodium silicate and 50 parts of nano silicon dioxide are weighed according to parts by weight, and are added into an internal mixer to be mixed for 30 minutes, so that the A-level nonflammable ceramic filling material is prepared.
Step 3: and (2) adding the grade-A non-combustible ceramic filling material prepared in the step (2) into a hopper of a screw extruder, controlling the rotation speed of the screw to be 100rpm, extruding and coating the material onto the conductor coated with the ceramic refractory silicon rubber insulating layer prepared in the step (1), and simultaneously wrapping the material on the outside to form the fireproof heat-insulating wrapping glass fiber cloth composite ceramic fiber felt.
Step 4: and (3) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (3) through melt extrusion.
In the halogen-free flame-retardant fire-resistant cable prepared by the embodiment, the thickness of the A-level non-inflammable ceramic filling layer is 1mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 5mm.
The halogen-free flame-retardant fire-resistant cable is prepared according to the formula and the process: the line integrity is detected according to G B/T19216.21-2003, namely, the 21 st part test step and requirement of the line integrity test of a cable or an optical cable under flame condition, namely, the rated voltage of 0.6/1.0kV and below, and meets the requirement of standard regulation; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Example 3:
step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 200 ℃.
Step 2: according to the mass portion, 20 portions of magnesium silicate, 80 portions of calcium silicate, 80 portions of sodium silicate and 1 portion of nano zirconium phosphate are weighed and added into a kneader to be mixed for 20 minutes, thus preparing the A-level nonflammable ceramic filling material.
Step 3: and (2) adding the grade-A non-combustible ceramic filling material prepared in the step (2) into a hopper of a screw extruder, controlling the rotation speed of the screw to be 50rpm, extruding and coating the material onto the conductor coated with the ceramic refractory silicon rubber insulating layer prepared in the step (1), and simultaneously wrapping the basalt fiber felt with fireproof heat insulation wrapping layers outside.
Step 4: and (3) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (3) through melt extrusion.
In the halogen-free flame-retardant fire-resistant cable prepared by the embodiment, the thickness of the A-level non-inflammable ceramic filling layer is 10mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 1mm.
The halogen-free flame-retardant fire-resistant cable is prepared according to the formula and the process: the line integrity is detected according to GB/T19216.21-2003, the 21 st part of the test steps and requirements of the line integrity test of cables or optical cables under flame conditions, namely the rated voltage of 0.6/1.0kV and below, and meets the standard regulation requirements; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Example 4:
step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 250 ℃.
Step 2: 80 parts of aluminum silicate, 20 parts of calcium oxide, 100 parts of potash water glass and 20 parts of nano montmorillonite are weighed according to the parts by weight, added into an internal mixer, and mixed for 20 minutes to prepare the A-level non-combustible ceramic filling material.
Step 3: and (2) adding the grade-A non-combustible ceramic filling material prepared in the step (2) into a hopper of a screw extruder, controlling the rotation speed of the screw to be 100rpm, extruding and coating the material on the conductor coated with the ceramic refractory silicon rubber insulating layer prepared in the step (1), and simultaneously wrapping the material on the outer part of the material with a fireproof heat-insulating wrapping layer double-layer glass fiber cloth.
Step 4: and (3) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (3) through melt extrusion.
In the halogen-free flame-retardant fire-resistant cable prepared by the embodiment, the thickness of the A-level non-inflammable ceramic filling layer is 2mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 1mm.
The halogen-free flame-retardant fire-resistant cable is prepared according to the formula and the process: the line integrity is detected according to GB/T19216.21-2003, the 21 st part of the test steps and requirements of the line integrity test of cables or optical cables under flame conditions, namely the rated voltage of 0.6/1.0kV and below, and meets the standard regulation requirements; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Example 5:
step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 200 ℃.
Step 2: 100 parts of strontium carbonate, 110 parts of potash water glass and 40 parts of nano montmorillonite are weighed according to the parts by weight, added into a kneader, and mixed for 20 minutes to prepare the A-level incombustible ceramic filling material.
Step 3: and (2) adding the grade-A non-combustible ceramic filling material prepared in the step (2) into a hopper of a screw extruder, controlling the rotation speed of the screw to be 100rpm, extruding and coating the material onto the conductor coated with the ceramic refractory silicon rubber insulating layer prepared in the step (1), and simultaneously wrapping the basalt fiber felt with fireproof heat insulation wrapping layers outside.
Step 4: and (3) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (3) through melt extrusion.
In the halogen-free flame-retardant fire-resistant cable prepared by the embodiment, the thickness of the A-level non-inflammable ceramic filling layer is 3mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 2mm.
The halogen-free flame-retardant fire-resistant cable is prepared according to the formula and the process: the line integrity is detected according to GB/T19216.21-2003, the 21 st part of the test steps and requirements of the line integrity test of cables or optical cables under flame conditions, namely the rated voltage of 0.6/1.0kV and below, and meets the standard regulation requirements; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B1 grade.
Comparative example:
step 1: and extruding and coating the ceramic fireproof silicon rubber insulating material on a copper conductor by adopting a rubber extruder, and vulcanizing by using a hot vulcanizing box, wherein the vulcanizing temperature is 200 ℃.
Step 2: and (2) extruding and coating the flame-retardant polypropylene filling layer on the conductor coated with the ceramic flame-retardant silicon rubber insulating layer prepared in the step (1), and wrapping the fireproof heat-insulating wrapping layer double-layer glass fiber cloth outside.
Step 3: and (2) coating a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the inner core product prepared in the step (2) through melt extrusion.
In the cable prepared in the comparative example, the flame-retardant polypropylene filling layer is 2mm higher than the outer surface of the insulating layer, and the thickness of the fireproof heat-insulating wrapping layer is 1mm.
The halogen-free flame-retardant fire-resistant cable is prepared according to the formula and the process: the line integrity is detected according to GB/T19216.21-2003, the 21 st part of the test steps and requirements of the line integrity test of cables or optical cables under flame conditions, namely the rated voltage of 0.6/1.0kV and below, and meets the standard regulation requirements; the flame retardant performance of the cable is detected according to GB 31247-2014 'cable and optical cable combustion performance grading', and the combustion performance grade is B3 grade.
From the comparative examples and examples, it can be seen that the halogen-free flame-retardant fire-resistant cable provided by the invention has excellent fire resistance and obviously better flame resistance than the conventional flame-retardant fire-resistant cable.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that modifications and adaptations to the present invention may be made by one of ordinary skill in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention 。
Claims (4)
1. A halogen-free flame-retardant fire-resistant cable comprises a copper conductor, a ceramic fire-resistant silicon rubber insulating layer, an A-level non-combustible ceramic filling layer, a fireproof heat-insulating wrapping layer and a low-smoke halogen-free flame-retardant polyolefin sheath, wherein the ceramic fire-resistant silicon rubber insulating layer, the A-level non-combustible ceramic filling layer, the fireproof heat-insulating wrapping layer and the low-smoke halogen-free flame-retardant polyolefin sheath are sequentially coated outside the copper conductor;
the A-level nonflammable ceramic filling layer comprises the following components in parts by mass: 100 parts of porcelain powder, 60-150 parts of adhesive and 1-50 parts of nano reinforcing auxiliary agent;
the porcelain powder is a mixture of aluminum oxide and calcium silicate, a mixture of mica powder, barium silicate and zirconium oxide, a mixture of magnesium silicate and calcium silicate or a mixture of aluminum silicate and calcium oxide;
the adhesive comprises one or more of magnesium oxychloride cement-based adhesive, composite phosphosilicate inorganic adhesive, lithium water glass, sodium water glass and potassium water glass;
the nanometer reinforcing auxiliary agent comprises one or more of nanometer montmorillonite, nanometer silicon dioxide, carbon nano tube, nanometer layered double hydroxide, nanometer zirconium phosphate, polysilsesquioxane and graphene oxide;
the thickness of the A-level nonflammable ceramic filling layer is 1-10 mm higher than the outer surface of the insulating layer;
the fireproof heat-insulating wrapping layer comprises one of a nano aerogel felt, a glass fiber cloth composite ceramic fiber felt, a basalt fiber felt and a glass fiber cloth.
2. The halogen-free flame retardant fire resistant cable according to claim 1, wherein when the fire-proof heat insulation wrapping layer is a glass fiber cloth, the number of layers of the glass fiber cloth is two or more.
3. The halogen-free flame retardant fire resistant cable according to claim 1 or 2, wherein the thickness of the fire-proof heat-insulating wrapping layer is 1-5 mm.
4. A method of preparing the halogen-free flame retardant fire resistant cable of any one of claims 1 to 3, comprising the steps of:
1) Extruding ceramic fire-resistant silicon rubber insulating material on the surface of the copper conductor to form a ceramic fire-resistant silicon rubber insulating layer coated on the surface of the copper conductor;
2) Extruding a class A nonflammable ceramic filling material from the outer surface of the ceramic fire-resistant silicon rubber insulating layer in the step 1) to form a class A nonflammable ceramic filling layer coated on the surface of the ceramic fire-resistant silicon rubber insulating layer;
3) The surface of the A-level nonflammable ceramic filling layer in the step 2) is wrapped with a fireproof heat-insulating wrapping layer;
4) And 3) extruding the low-smoke halogen-free flame-retardant polyolefin material on the surface of the fireproof heat-insulating wrapping layer in the step 3) to obtain the halogen-free flame-retardant cable.
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| CN108897108A (en) * | 2018-07-12 | 2018-11-27 | 安徽牡东通讯光缆有限公司 | A kind of outdoor optical cable |
| CN112992411B (en) * | 2021-01-16 | 2022-07-12 | 江西江缆科技有限公司 | Flexible mineral insulation fireproof cable and preparation method thereof |
| CN113582677B (en) * | 2021-07-07 | 2022-11-29 | 浙江工业大学 | Low-temperature sintering ceramic powder and preparation method thereof |
| CN114956765A (en) * | 2022-05-17 | 2022-08-30 | 湖北龙腾红旗电缆(集团)有限公司 | Used water glass sand steam regeneration liquid refractory mortar for refractory cable and preparation method thereof |
| CN115312231B (en) * | 2022-08-17 | 2023-04-04 | 广东南缆电缆有限公司 | Ceramizable insulating composition for fire-resistant cable and preparation method and application thereof |
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