CN114815109B - B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof - Google Patents
B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof Download PDFInfo
- Publication number
- CN114815109B CN114815109B CN202210575104.XA CN202210575104A CN114815109B CN 114815109 B CN114815109 B CN 114815109B CN 202210575104 A CN202210575104 A CN 202210575104A CN 114815109 B CN114815109 B CN 114815109B
- Authority
- CN
- China
- Prior art keywords
- layer
- flame
- stranded
- retardant
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
- C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/441—Optical cables built up from sub-bundles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Insulated Conductors (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a B2 ca-level large-core number layer-stranded gas-resistant gas-blowing micro cable and a preparation method thereof, wherein the micro cable comprises a central reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside; each layer of stranded structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber; the mica tape fully coats the stranded structure cable core and is tied up by using the binding yarn, and the outer sheath is made of flame retardant materials, and the flame retardant materials comprise: 12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a double-peak structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon carbonizing agent, 1-3% of nitrogen synergist and 1-3% of phosphate; flame retardants include ultrafine active aluminum hydroxide and magnesium hydroxide. The micro cable has excellent flame retardance and can reach Bca performance indexes.
Description
Technical Field
The invention belongs to the technical field of optical cables, and particularly relates to a B2 ca-level large-core-number layer-stranded gas-resistant micro cable and a preparation method thereof.
Background
With the increasing of network coverage density of communication operators, optical cable wiring is increasingly dense, and most indoor access is carried out by adopting pipeline air-blowing micro-cables, but the optical cable often plays the role of a fire disaster, so that fire disaster is rapidly expanded and spread, valuable electronic instruments and equipment are damaged, normal operation of the whole line is influenced, even paralysis is caused, and a large amount of smoke generated during combustion threatens life safety.
The traditional flame-retardant air-blown optical cable has small core number, the loose tube adopts conventional PBT, and the fiber paste in the loose tube adopts conventional fiber paste, so that the flame-retardant grade is relatively low, and is generally Cca and below.
Disclosure of Invention
In view of the above, the present invention aims to provide a B2 ca-grade large-core number layer-stranded gas-barrier micro cable and a preparation method thereof, wherein the micro cable has excellent flame retardance.
The invention provides a B2 ca-level large-core number layer-stranded flame-retardant air-blown micro cable which is characterized by comprising a central reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside;
Each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber.
In the invention, if the single-layer stranded structure is adopted, the single-layer stranded structure comprises 10-15 loose tubes;
If the double-layer stranding structure is adopted, 6-10 loose tubes are included in the inner-layer stranding structure, and 12-18 loose tubes are included in the outer-layer stranding structure.
In the invention, the tearing rope is arranged in the stranding structure and is arranged between the sheath material and the mica tape.
In the invention, the mica tape completely covers the cable core of the twisted structure and is fastened by using the binding yarn.
In the present invention, a water blocking yarn is further included, which is placed around the outside of the mat layer.
In the invention, the outer sheath is made of a flame retardant material, and the flame retardant material comprises the following components in percentage by mass:
12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a bimodal structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon char former, 1-3% of nitrogen synergist and 1-3% of phosphate;
The flame retardant comprises superfine active aluminum hydroxide and magnesium hydroxide.
In the invention, the blended EVA takes ethylene vinyl acetate copolymer as a base material and is formed by blending with ethylene vinyl acetate copolymer with VA percent content higher than 40 percent;
The mass ratio of superfine active aluminum hydroxide to magnesium hydroxide in the flame retardant is (10-25): (10-25).
In the invention, the cushion layer comprises 20-60 parts by weight of polyethylene; 10-30 parts of ethylene-octene copolymer; 3-10 parts of a compatilizer; 15-30 parts of modified magnesium hydroxide; 3-15 parts of silane modified nano kaolin; 4-15 parts of brominated flame retardant; 2-8 parts of antimony white; 1-5 parts of a processing agent; 2-9 parts of black matrix; 0.5-2 parts of antioxidant.
In the invention, the loose tube is prepared by adopting flame-retardant PBT for sleeve molding;
The flame-retardant PBT comprises, by mass, 70-80% of PBT, 15-20% of ammonium polyphosphate, 5-10% of nitrogen flame retardant, 0-2% of toughening agent, 0-5% of antioxidant and 0-5% of glass fiber.
The invention provides a preparation method of the B2 ca-level large-core-number layer-stranded flame-retardant air-blown micro cable, which comprises the following steps:
sleeving the colored optical fibers into loose tubes filled with flame-retardant fiber paste, and repeating to obtain a plurality of loose tubes;
A single-layer or double-layer stranded structure is arranged on the periphery of the central reinforcing piece sleeved with the cushion layer, and each layer of stranded structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis;
and wrapping a layer of mica tape on the outer layer of the stranded structure, and uniformly extruding an outer sheath to form the B2 ca-level large-core-number layer stranded flame-retardant air-blown micro cable.
The invention provides a B2 ca-level large-core number layer-stranded flame-retardant air-blown micro cable, which comprises a central reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside; each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber; the outer sheath is made of a flame retardant material, and the flame retardant material comprises the following components in percentage by mass: 12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a bimodal structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon char former, 1-3% of nitrogen synergist and 1-3% of phosphate; the flame retardant comprises superfine active aluminum hydroxide and magnesium hydroxide. The air-blown micro cable has excellent flame retardance and can reach Bca performance indexes.
Drawings
FIG. 1 is a schematic diagram of a B2 ca-level large core number single-layer twisted gas-barrier micro cable structure in the invention;
FIG. 2 is a schematic diagram of a B2 ca-level large core number double-layer twisted gas-barrier micro cable structure in the invention;
FIG. 3 is a flow chart of a B2 ca-level large core number layer stranded gas-barrier gas-blowing micro cable process in the invention.
Detailed Description
The invention provides a B2 ca-level large-core number layer-stranded flame-retardant air-blown micro cable, which comprises a central reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside;
Each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber.
The B2 ca-level large-core number layer-stranded flame-retardant air-blown micro cable is mainly used for air blowing in pipeline buildings, has the advantages of large core number and high pipeline utilization rate, has excellent flame retardant performance, and reduces the loss caused by taking the micro cable as a combustion object when a fire disaster occurs.
See fig. 1 and 2; FIG. 1 is a schematic diagram of a B2 ca-level large core number single-layer twisted gas-barrier micro cable structure in the invention; FIG. 2 is a schematic diagram of a B2 ca-level large core number double-layer twisted gas-barrier micro cable structure in the invention;
The B2 ca-level large-core number layer-stranded gas-resistant micro cable provided by the invention comprises a central reinforcing piece; the center reinforcement is a nonmetallic center reinforcement.
A cushion layer is sleeved outside the central reinforcing piece; the cushion layer is prepared from the following raw materials in parts by weight, namely 20-60 parts of polyethylene; 10-30 parts of ethylene-octene copolymer; 3-10 parts of a compatilizer; 15-30 parts of modified magnesium hydroxide; 3-15 parts of silane modified nano kaolin; 4-15 parts of brominated flame retardant; 2-8 parts of antimony white; 1-5 parts of a processing agent; 2-9 parts of black matrix; 0.5-2 parts of antioxidant.
In the present invention, the modified magnesium hydroxide may be selected from commercially available dry modified magnesium hydroxide; adding a proper amount of inert solvent into the dried magnesium hydroxide, mixing the magnesium hydroxide with a surface forming machine to carry out surface organization, and drying or other treatment after full mixing to obtain modified magnesium hydroxide; the inert solvent is selected from toluene, xylene, solvent-based gasoline or petroleum ether. The modified magnesium hydroxide is preferably modified magnesium hydroxide of the company Weifang sea Li Longmei, trade name: H1410.
In the present invention, the compatibilizer in the cushion layer is preferably one or more selected from the group consisting of a cyclic anhydride type compatibilizer, a carboxylic acid type compatibilizer, and an epoxy type compatibilizer; the processing agent is preferably selected from one or more of Methyl Methacrylate (MMA)/acrylate copolymer, acrylonitrile/styrene copolymer and MMA/styrene copolymer; the antioxidant is preferably an alkylphenol antioxidant and/or an aromatic phenol series antioxidant; the brominated flame retardant is classified into an additive brominated flame retardant, a reactive brominated flame retardant and a high polymer brominated flame retardant, preferably an additive brominated flame retardant.
The B2 ca-level large-core number layer-stranded gas-resistant gas-blowing micro cable provided by the invention comprises a single-layer or double-layer stranded structure; each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber.
In the invention, if the single-layer stranded structure is adopted, the single-layer stranded structure comprises 10-15 loose tubes; if the double-layer stranding structure is adopted, 6-10 loose tubes are included in the inner-layer stranding structure, and 12-18 loose tubes are included in the outer-layer stranding structure.
In the invention, the flame-retardant fiber paste in the loose tube comprises 70-80% of base oil, 7-9% of composite thickener, 0-2% of flame retardant and 0-5% of antioxidant by mass fraction; the base oil is hydrogenated paraffinic oil-hydrogenated naphthenic oil mixed oil, and the mass ratio of the hydrogenated paraffinic oil to the hydrogenated naphthenic oil in the mixed oil is 2-2.5:3-4.2; the composite thickener is a mixture of polyacrylamide and fatty alcohol polyoxyethylene ether, and the mass ratio of the polyacrylamide to the fatty alcohol polyoxyethylene ether in the mixture is 5-6:7-8; the flame retardant is one or more selected from phosphorus organic flame retardants, phosphorus inorganic flame retardants and phosphorus nitrogen flame retardants, and the flame retardants respectively flame retardant from gas phase and condensed phase flame retarding mechanisms; the antioxidant is preferably an alkylphenol antioxidant and/or an aromatic phenol antioxidant.
The B2 ca-level large-core number layer-stranded gas-resistant blowing micro cable provided by the invention comprises a mica tape, wherein the mica tape is sleeved on the periphery of the single-layer or double-layer stranded structure; the mica tape has a good heat insulation effect; the mica tape in the present invention may be one well known to those skilled in the art, and commercially available products thereof are used.
The B2 ca-level large-core number layer-stranded flame-retardant air-blown optical cable comprises an outer sheath; the outer sheath is made of a high-flame-retardant cracking-resistant low-smoke halogen-free material, so that the flame retardant property is improved, and the fire-proof grade of the optical cable is improved; in the invention, the outer sheath is made of a flame retardant material, and the flame retardant material comprises the following components in percentage by mass: 12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a bimodal structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon char former, 1-3% of nitrogen synergist and 1-3% of phosphate; the flame retardant comprises superfine active aluminum hydroxide and magnesium hydroxide.
In the invention, the blended EVA comprises the following components in percentage by mass: 20-40 of a blend of an ethylene vinyl acetate copolymer having a VA content of 5 wt-40 wt% and an ethylene vinyl acetate copolymer having a VA content of higher than 40%.
In the invention, the flame retardant system of the outer sheath adopts superfine active aluminum hydroxide and magnesium hydroxide as main flame retardants, and the average particle size of the flame retardant system is smaller than 1 micron. The flame-retardant material of the outer sheath can block an air system: by adding the flame retardant, the flame retardant can be quickly nucleated to form a shell capable of isolating air, so that the flame is quickly extinguished; the air system can also be diluted: inert gas is generated in the combustion process, so that the fire source is anoxic to inhibit combustion so that the fire source is extinguished, and the self-extinguishing performance of the off-fire is improved; the heat release system can also be reduced: the heat absorption capacity is increased to reduce the temperature of the fire source, so that the combustion of the fire source is slowed down, and the aim of extinguishing is fulfilled; smoke suppression: by limiting the amount of smoke generation by suppressing the amount of smoke generation, the light transmittance during the burning of the cable is improved.
In the invention, melamine is generally adopted as the nitrogen-based synergist; the linear low density polyethylene with a bimodal structure takes ethylene as a main raw material, and a polymer formed by a small amount of alpha-olefin, catalyst and the like is preferably adopted as the linear low density polyethylene with a bimodal structure with brands of 2230 and the like in Nordic chemical industry on the market.
The invention provides a preparation method of the B2 ca-level large-core-number layer-stranded flame-retardant air-blown micro cable, which comprises the following steps:
sleeving the colored optical fibers into loose tubes filled with flame-retardant fiber paste, and repeating to obtain a plurality of loose tubes;
A single-layer or double-layer stranded structure is arranged on the periphery of the central reinforcing piece sleeved with the cushion layer, and each layer of stranded structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis;
and wrapping a layer of mica tape on the outer layer of the stranded structure, and uniformly extruding an outer sheath to form the B2 ca-level large-core-number layer stranded flame-retardant air-blown optical cable.
The invention screens the optical fibers in warehouse and selects the optical fibers with excellent transmission characteristics and qualified tension. The invention colors the optical fiber, selects standard full color spectrum for marking, requires high temperature to avoid fading, and ensures easy identification during connection.
The loose tube passes through an extrusion molding die, tension is set, and the loose tube adopts a 36-core per-tube structure at maximum.
In the invention, after wrapping a layer of mica tape, a tearing rope is placed, and then an outer sheath is extruded uniformly; preferably a single tear string is placed.
The B2 ca-level large-core number layer-stranded flame-retardant air-blown optical cable provided by the invention has excellent burning resistance, excellent self-extinguishing from fire and good nucleating property, and simultaneously keeps low heat release and low smoke release during the combustion period of the optical cable, thereby meeting the flame-retardant performance requirement of CPR authentication on the B2 ca-level optical cable, and the specific test method refers to EN50399, EN60332-1-2 and EN61034-2.
In order to further illustrate the present invention, the following examples are provided to describe a B2 ca-level large core number layer-stranded gas-barrier micro cable and a method for preparing the same in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
According to the process shown in fig. 3:
(1) And (5) optical fiber warehouse entry: screening the optical fibers in the warehouse, and selecting the optical fibers with excellent transmission characteristics and qualified tension;
(2) Coloring the optical fiber: the optical fiber is colored, and a standard full color spectrum is selected for marking, so that the optical fiber is required to be free from fading at high temperature and easy to identify during connection;
(3) And (3) plastic coating: the sleeve loosening procedure is to set tension through an extrusion molding die, and the sleeve is in a 36-core structure at most;
sleeving the colored optical fiber into a high-modulus sleeve filled with flame-retardant fiber paste, so that the optical fiber in the sleeve has stable surplus length control and transmission characteristics;
the flame-retardant fiber paste comprises 75% of base oil (a mixture of hydrogenated paraffin oil and hydrogenated naphthene oil in a mass ratio of 2:3), 8% of a composite thickener (a mixture of polyacrylamide-fatty alcohol polyoxyethylene ether in a mass ratio of 6:8), 2% of a phosphorus-nitrogen flame retardant and 1.8% of an alkylphenol antioxidant;
(4) And (3) cabling: the cabling adopts a central reinforcing member, the outside of a cushion layer of the central reinforcing member is always (directly) wound (wrapped), and then a single layer of 12 loose tubes are stranded; or double-layer loose tubes, 9 loose tubes in the inner layer and 15 loose tubes in the outer layer; wrapping a layer of mica tape on the outer layer of the cable core;
The cushion layer comprises 50 parts of polyethylene; 20 parts of ethylene-octene copolymer; 5 parts of a cyclic anhydride type compatilizer; 20 parts of modified magnesium hydroxide; 9 parts of silane modified nano kaolin; 9 parts of brominated flame retardant; 4 parts of antimony white; 3 parts of a processing agent; 5 parts of black matrix; alkylphenol antioxidant 1 part
(5) Wrapping an outer sheath: single tearing ropes are placed outside the cable core, and a layer of high-flame-retardant, cracking-resistant, low-smoke and halogen-free sheath material is uniformly extruded to form a B2 ca-level large-core number layer-stranded gas-resistant blowing optical cable;
The high-flame-retardance cracking-resistant low-smoke halogen-free sheath material comprises 20 parts of blended EVA (ethylene-octene copolymer), 15 parts of linear low-density polyethylene with a bimodal structure, 8 parts of maleic anhydride grafted PE (polyethylene), 35 parts of flame retardant (a mixture of superfine active aluminum hydroxide and magnesium hydroxide with the mass ratio of 15:15), 7 parts of organosilicon carbonizing agent, 2 parts of nitrogen synergist and 2 parts of phosphate; (6) detecting out of a warehouse: finally, carrying out full-performance test on the optical cable, packaging and leaving the warehouse after the optical cable is qualified, wherein the result is shown in Table 1:
TABLE 1 results of Performance test of micro-cables prepared in example 1
From the embodiment, the invention provides a B2 ca-level large-core-number layer stranded flame-retardant air-blown micro cable, which comprises a central reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside; each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber; the outer sheath is made of a flame retardant material, and the flame retardant material comprises the following components in percentage by mass: 12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a bimodal structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon char former, 1-3% of nitrogen synergist and 1-3% of phosphate; the flame retardant comprises superfine active aluminum hydroxide and magnesium hydroxide. The air-blown micro cable has excellent flame retardance and can reach Bca performance indexes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. The B2 ca-level large-core number layer-stranded flame-retardant air-blown micro cable is characterized by comprising a center reinforcing piece, a cushion layer, a single-layer or double-layer stranded structure, a mica tape and an outer sheath which are sequentially arranged from inside to outside;
each layer of the twisting structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis; each loose tube is internally provided with an optical fiber and flame-retardant fiber paste for wrapping the optical fiber;
the outer sheath is made of a flame retardant material, and the flame retardant material comprises the following components in percentage by mass:
12-30% of blended EVA, 5-20% of ethylene-octene copolymer, 8-30% of linear low density polyethylene with a bimodal structure, 5-15% of maleic anhydride grafted PE, 20-50% of flame retardant, 2-10% of organosilicon char former, 1-3% of nitrogen synergist and 1-3% of phosphate; the blending EVA takes ethylene vinyl acetate copolymer with VA content of 5% -40% as a base material, and is formed by blending with ethylene vinyl acetate copolymer with VA content higher than 40%;
The flame retardant comprises superfine active aluminum hydroxide and magnesium hydroxide; the mass ratio of superfine active aluminum hydroxide to magnesium hydroxide in the flame retardant is (10-25): (10-25).
2. The B2ca grade large core number layer stranded flame retardant air blown micro cable of claim 1, wherein if in a single layer stranded structure, the single layer stranded structure comprises 10-15 loose tubes;
If the double-layer stranding structure is adopted, 6-10 loose tubes are included in the inner-layer stranding structure, and 12-18 loose tubes are included in the outer-layer stranding structure.
3. The B2ca grade high core number layer stranded flame retardant air blown micro cable of claim 1, wherein a tear rope is disposed in the stranded structure, the tear rope being disposed between the sheath material and the mica tape.
4. The B2ca grade high core lay fire resistant air blown micro cable of claim 1, further comprising water blocking yarns disposed around the outside of the mat layer.
5. The B2ca grade large core number layer stranded flame retardant air blown micro cable of claim 1, wherein the bedding layer comprises 20-60 parts by weight of polyethylene; 10-30 parts of ethylene-octene copolymer; 3-10 parts of a compatilizer; 15-30 parts of modified magnesium hydroxide; 3-15 parts of silane modified nano kaolin; 4-15 parts of brominated flame retardant; 2-8 parts of antimony white; 1-5 parts of a processing agent; 2-9 parts of black matrix; 0.5-2 parts of antioxidant.
6. The B2 ca-grade large-core number layer-stranded flame-retardant air-blown micro cable according to claim 1, wherein the loose tube is made by sleeving flame-retardant PBT;
The flame-retardant PBT comprises, by mass, 70-80% of PBT, 15-20% of ammonium polyphosphate, 5-10% of a nitrogen flame retardant, 0-2% of a toughening agent, 0-5% of an antioxidant and 0-5% of glass fibers.
7. A method for preparing the B2 ca-grade large-core number layer-stranded flame-retardant air-blown micro cable according to any one of claims 1 to 6, comprising the following steps:
sleeving the colored optical fibers into loose tubes filled with flame-retardant fiber paste, and repeating to obtain a plurality of loose tubes;
A single-layer or double-layer stranded structure is arranged on the periphery of the central reinforcing piece sleeved with the cushion layer, and each layer of stranded structure comprises a plurality of loose tubes symmetrically distributed along the cushion layer axis;
and wrapping a layer of mica tape on the outer layer of the stranded structure, and uniformly extruding an outer sheath to form the B2 ca-level large-core-number layer stranded flame-retardant air-blown micro cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575104.XA CN114815109B (en) | 2022-05-25 | 2022-05-25 | B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575104.XA CN114815109B (en) | 2022-05-25 | 2022-05-25 | B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114815109A CN114815109A (en) | 2022-07-29 |
| CN114815109B true CN114815109B (en) | 2024-07-30 |
Family
ID=82517491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210575104.XA Active CN114815109B (en) | 2022-05-25 | 2022-05-25 | B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114815109B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117331184B (en) * | 2023-11-20 | 2024-04-12 | 浙江富春江光电科技有限公司 | Aging-resistant outdoor optical cable and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581369A (en) * | 2003-08-15 | 2005-02-16 | 北京化工大学 | Halogen-free non-phosphorus flame-retarded cable sheath material |
| CN104893088A (en) * | 2015-06-17 | 2015-09-09 | 上海至正道化高分子材料股份有限公司 | Ultraviolet light crosslinking low-smoke zero-halogen flame-retardant cable material and preparation method thereof |
| CN106590006A (en) * | 2016-12-07 | 2017-04-26 | 安徽合聚阻燃新材料股份有限公司 | Class-B flame-retarding irradiation crosslinking halogen-free low-smoke insulated cable material |
| CN108957661A (en) * | 2018-08-07 | 2018-12-07 | 江苏亨通光电股份有限公司 | Fire-retardant air-blowing micro-cable |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201149622Y (en) * | 2008-01-25 | 2008-11-12 | 成都亨通光通信有限公司 | Novel optical cable for coal mine safety communication |
| CN101481475B (en) * | 2008-07-17 | 2011-11-02 | 黑龙江沃尔德电缆有限公司 | Ultraviolet crosslinked expansion type flame-retardant polyolefin cable insulation sheath material and preparation thereof |
| CN102161793B (en) * | 2011-03-07 | 2015-07-22 | 黑龙江省润特科技有限公司 | Ultraviolet deep-crosslinked expansion flame-retardant polyolefine cable material, and preparation method of insulating or jacket layer thereof |
| CN102153802B (en) * | 2011-03-07 | 2013-03-27 | 沭阳优唯新材料有限公司 | Ultraviolet-light deeply cross-linked halogen-free flame-retardant polyolefin cable material and method for preparing ultraviolet-light deeply cross-linked halogen-free flame-retardant polyolefin cable insulating or sheathing layer from same |
| CN203909360U (en) * | 2014-05-22 | 2014-10-29 | 长飞光纤光缆四川有限公司 | Center pipe type ADSS optical cable |
| CN104177695A (en) * | 2014-09-17 | 2014-12-03 | 朱忠良 | Crosslinked halogen-free flame-retardant cable material |
| CN104403190A (en) * | 2014-12-09 | 2015-03-11 | 黑龙江省润特科技有限公司 | Ultraviolet cross-linking oil-resistant low-smoke halogen-free flame retardant polyolefin cable material and preparation method thereof |
| CN204882964U (en) * | 2015-04-09 | 2015-12-16 | 河北光城通信科技有限公司 | Full medium air -blowing micro -cable |
| CN204731460U (en) * | 2015-05-22 | 2015-10-28 | 成都亨通光通信有限公司 | A kind of Novel optical cable for mine safety transmission |
| CN107177086A (en) * | 2016-03-11 | 2017-09-19 | 杜义勇 | A kind of rat-and-ant proof cracking resistance flame-proof cable sheath material |
| CN206161940U (en) * | 2016-11-22 | 2017-05-10 | 深圳市特发信息股份有限公司 | Optical cable with temperature and stress sensing function |
| CN110361820A (en) * | 2019-08-06 | 2019-10-22 | 江苏中天科技股份有限公司 | air blown micro cable |
| CN212229265U (en) * | 2020-05-21 | 2020-12-25 | 深圳市雅信通光缆有限公司 | Fire-resistant optical cable for fire control |
| CN212872996U (en) * | 2020-08-20 | 2021-04-02 | 江苏亨通光电股份有限公司 | Novel optical cable for communication between underwater equipment and cabin internal equipment |
| CN111856673A (en) * | 2020-08-20 | 2020-10-30 | 江苏亨通光电股份有限公司 | Optical cable for communication between new underwater equipment and equipment inside the cabin |
| CN212781424U (en) * | 2020-09-24 | 2021-03-23 | 远东通讯有限公司 | Air-blowing micro cable suitable for narrow space arrangement |
| CN114002794B (en) * | 2021-11-17 | 2022-10-21 | 长飞光纤光缆股份有限公司 | Layer-stranded air-blown micro-cable with high fiber core density, and preparation method and application of outer layer thereof |
-
2022
- 2022-05-25 CN CN202210575104.XA patent/CN114815109B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581369A (en) * | 2003-08-15 | 2005-02-16 | 北京化工大学 | Halogen-free non-phosphorus flame-retarded cable sheath material |
| CN104893088A (en) * | 2015-06-17 | 2015-09-09 | 上海至正道化高分子材料股份有限公司 | Ultraviolet light crosslinking low-smoke zero-halogen flame-retardant cable material and preparation method thereof |
| CN106590006A (en) * | 2016-12-07 | 2017-04-26 | 安徽合聚阻燃新材料股份有限公司 | Class-B flame-retarding irradiation crosslinking halogen-free low-smoke insulated cable material |
| CN108957661A (en) * | 2018-08-07 | 2018-12-07 | 江苏亨通光电股份有限公司 | Fire-retardant air-blowing micro-cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114815109A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104893088B (en) | Ultraviolet light crosslinking low-smoke zero-halogen flame-retardant cable material and preparation method thereof | |
| WO2023035486A1 (en) | B2-grade flame-retardant cable, preparation method therefor and use thereof | |
| DE10124755A1 (en) | Flame retardant halogen-free polymer compositions with low smoke emission, low corrosivity, low toxicity and low heat release | |
| US11579388B2 (en) | Optical fiber cable with improved fire protection performance | |
| AU2017101785A4 (en) | Insulated core wire, CMP grade high-flame-retardant data cable, and manufacturing processes for the two | |
| WO2018013396A1 (en) | Fiber optic cable | |
| CN106125216B (en) | High-grade flame-retardant fire-resistant optical cable | |
| CN106710682B (en) | A kind of flame retardant cable and preparation method thereof | |
| CN114815109B (en) | B2 ca-level large-core-number layer-stranded gas-resistant micro cable and preparation method thereof | |
| CN118866449A (en) | A low-smoke flame-retardant power cable and its preparation process | |
| CN107892771A (en) | A kind of cold-resistant low-smoke halogen-free flame-proof cable material and preparation method thereof | |
| CN205177445U (en) | Fireproof cable | |
| CN112992413A (en) | Heat-insulation fireproof cable and preparation method thereof | |
| CN116535767B (en) | Flame retardant material, preparation method and flame retardant cable filled with the material | |
| CN216287633U (en) | Flame-retardant fire-resistant flexible cable for communication power supply | |
| CN205177472U (en) | Environment -friendly fireproof cable | |
| CN116721796A (en) | Low-smoke halogen-free flame-retardant B1-level control cable and sheath material manufacturing method | |
| CN116970228A (en) | A low-smoke, halogen-free and environmentally friendly household cable | |
| CN114456516A (en) | Network combined cable and preparation process thereof | |
| CN215183178U (en) | Impact-resistant combustion grade B1 cable | |
| CN207966545U (en) | A kind of alloy-type flame-proof environmental protection electric wire | |
| CN106832543A (en) | A kind of 105 DEG C of halogen-free low-smoke flame-resistant polyolefin cable material of ambient self-crosslinking | |
| CN108691224A (en) | A kind of fire-retardant hawser | |
| CN222896555U (en) | A Category 6 network cable | |
| CN119381067B (en) | Low smoke halogen-free flame retardant cable for subway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |