CN112485873A - High-strength flame-retardant optical fiber cable - Google Patents
High-strength flame-retardant optical fiber cable Download PDFInfo
- Publication number
- CN112485873A CN112485873A CN202011351133.5A CN202011351133A CN112485873A CN 112485873 A CN112485873 A CN 112485873A CN 202011351133 A CN202011351133 A CN 202011351133A CN 112485873 A CN112485873 A CN 112485873A
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- Prior art keywords
- layer
- retardant
- flame
- optical fiber
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- 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
-
- 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
-
- 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
Abstract
The invention discloses a high-strength flame-retardant optical fiber cable in the technical field of optical cables, which comprises: a central reinforcing rib; the optical cable core strengthening layers are uniformly distributed on the outer wall of the central reinforcing rib; the heat shrink tube is sleeved on the outer walls of the optical cable core strengthening layers; the flame-retardant rubber layer is coated on the outer wall of the heat shrinkable tube; the gas flame-retardant layer is coated on the outer wall of the flame-retardant rubber layer; the armor layer is coated on the outer wall of the gas flame-retardant layer; the strength of the optical fiber cable is enhanced by arranging the central reinforcing layer and the shielding reinforcing layer, and the flame retardance of the optical fiber cable is improved by arranging the flame-retardant rubber layer and the gas flame-retardant layer.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a high-strength flame-retardant optical fiber cable.
Background
Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications and utilize one or more optical fibers disposed in a covering jacket as the transmission medium and may be used individually or in groups as telecommunication cable assemblies. The optical cable is mainly composed of optical fibers (thin glass filaments like hair), a plastic protective sleeve and a plastic sheath, and metals such as gold, silver, copper and aluminum are not contained in the optical cable, so that the optical cable generally has no recycling value. The optical cable is a communication line which is formed by a certain number of optical fibers into a cable core in a certain mode, is externally coated with a sheath, and is also coated with an outer protective layer for realizing optical signal transmission. Namely: a cable formed by subjecting an optical fiber (optical transmission carrier) to a certain process. The basic structure of the optical cable generally comprises a cable core, a reinforcing steel wire, a filler, a sheath and other parts, and further comprises a waterproof layer, a buffer layer, an insulated metal wire and other components according to requirements.
The armor of current optical cable all sets up the part that is close to the outside at whole optical cable, and the itself of optic fibre does not have any protection, receives external force when great, and the impact force can see through the armor and directly cause destruction to optic fibre itself to current optical cable only has the fire-retardant layer of one deck to carry out fire-retardant, can't be timely when receiving the naked light burning put out the goods to flame and really reduce flame temperature, causes stretching of conflagration easily.
Disclosure of Invention
The invention aims to provide a high-strength flame-retardant optical fiber cable, which solves the problems that the armor layers of the existing optical cables proposed in the background technology are all arranged at the parts, close to the outer sides, of the whole optical cables, the optical fibers are not protected at all, when external force is large, impact force can directly damage the optical fibers through the armor layers, and the existing optical cables are only provided with one flame-retardant layer for flame retardance, so that when the existing optical cables are burnt by open fire, the flame temperature can be reduced due to the fact that flames cannot be put out in time, and the spreading of fire is easily caused.
In order to achieve the purpose, the invention provides the following technical scheme: a high-strength flame-retardant optical fiber cable comprising:
a central reinforcing rib;
the optical cable core strengthening layers are uniformly distributed on the outer wall of the central reinforcing rib;
the heat shrink tube is sleeved on the outer walls of the optical cable core strengthening layers;
the flame-retardant rubber layer is coated on the outer wall of the heat shrinkable tube;
the gas flame-retardant layer is coated on the outer wall of the flame-retardant rubber layer;
the armor layer is coated on the outer wall of the gas flame-retardant layer;
the outer protective layer is coated on the outer wall of the armor layer.
Preferably, the optical cable core reinforcing layer comprises:
a cable core;
the inner protective layer is coated on the outer wall of the optical cable core;
the shielding strengthening layer is coated on the outer wall of the inner protection layer.
Preferably, the shielding reinforcing layer is formed by weaving polyester fibers and copper wires or aluminum wires.
Preferably, the flame-retardant rubber layer is formed by mixing a thermoplastic elastomer, unsaturated rubber, a halogen-free flame retardant and an additive.
Preferably, the thermoplastic elastomer is prepared by mixing any two or more of ethylene-vinyl acetate copolymer, polyvinyl acetate, styrene-butadiene-styrene block copolymer, thermoplastic polyurethane and linear low-density polyethylene.
Preferably, the unsaturated rubber is prepared by mixing any two or more of ethylene propylene diene monomer, natural rubber, chloroprene rubber, styrene butadiene rubber, nitrile rubber, butadiene rubber and isoprene rubber.
Preferably, the halogen-free flame retardant is prepared by mixing any two or more of aluminum hypophosphite, diethyl aluminum hypophosphite, melamine polyphosphate, melamine pyrophosphate, melamine cyanurate, red phosphorus, microcapsule-coated red phosphorus, pentaerythritol, ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide, triazine charring agent, zinc borate, carbon nano tube and montmorillonite.
Preferably, the gas flame retardant layer comprises:
an inner coating layer;
the annular elastic bodies are uniformly sleeved on the outer wall of the inner coating layer, the distance between every two adjacent annular elastic bodies is equal, and the annular elastic bodies and the inner coating layer are subjected to sealing treatment;
and the outer coating is coated on the outer walls of the annular elastic bodies, and sealing treatment is performed between the outer coating and the annular elastic bodies.
Compared with the prior art, the invention has the beneficial effects that: the strength of the optical fiber cable is enhanced by arranging the central reinforcing layer and the shielding reinforcing layer, the flame retardance of the optical fiber cable is improved by arranging the flame-retardant rubber layer and the gas flame-retardant layer, the polyester fiber has higher strength and elastic recovery capability, the electromagnetic shielding function can be realized by weaving with copper wires or aluminum wires, the strength of a core of the optical fiber cable can be improved, the strength of the core of the optical fiber cable is effectively improved, the optical fiber cable core reinforcing layer is fixed on the outer wall of the central reinforcing rib through the heat-shrinkable tube, the central reinforcing rib is positioned in the middle of the whole optical cable, the tensile strength of the optical fiber cable is improved, the flame-retardant rubber layer is coated on the outer wall of the heat-shrinkable tube, the flame-retardant rubber layer is formed by mixing thermoplastic elastomer, unsaturated rubber, halogen-free flame retardant and additives and is used for improving the flame retardance of the optical fiber cable, and the, and nitrogen or carbon dioxide gas is filled in the sealed space, when the optical fiber cable is ignited, the outer coating is damaged, and the nitrogen or carbon dioxide gas filled in the sealed space leaks to extinguish the peripheral open fire, so that the flame-retardant effect is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a core strength layer of an optical cable according to the present invention;
fig. 3 is a cross-sectional view of a gas flame retardant layer of the present invention.
In the figure: 100 central reinforcing ribs, 200 optical cable core reinforcing layers, 210 optical cable cores, 220 inner protective layers, 230 shielding reinforcing layers, 300 heat shrinkable tubes, 400 flame-retardant rubber layers, 500 gas flame-retardant layers, 510 inner covering layers, 520 annular elastic bodies, 530 outer covering layers, 600 armor layers and 700 outer covering layers.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a high-strength flame-retardant optical fiber cable, which is characterized in that the strength of the optical fiber cable is enhanced by arranging a central reinforcing layer and a shielding reinforcing layer, and the flame retardance of the optical fiber cable is improved by arranging a flame-retardant rubber layer and a gas flame-retardant layer, and the high-strength flame-retardant optical fiber cable with the flame-retardant rubber layer and the shielding reinforcing layer comprises the following components in percentage by weight, referring to: the optical cable comprises a central reinforcing rib 100, an optical cable core reinforcing layer 200, a heat shrinkable tube 300, a flame-retardant rubber layer 400, a gas flame-retardant layer 500, an armor layer 600 and an outer protective layer 700;
referring again to fig. 1, the central stiffener 100 is a steel wire or fiberglass reinforcement;
referring to fig. 1-2, a plurality of optical cable core strength enhancing layers 200 are uniformly distributed on the outer wall of the central stiffener 100, and the optical cable core strength enhancing layers 200 include:
a cable core 210;
the inner sheath layer 220 is coated on the outer wall of the optical cable core 210, and the inner sheath layer 220 is made of natural rubber;
the shielding reinforcing layer 230 is coated on the outer wall of the inner sheath 220, the shielding reinforcing layer 230 is formed by weaving polyester fibers and copper wires or aluminum wires, the polyester fibers have high strength and elastic recovery capability, and the shielding reinforcing layer can play a role in shielding electromagnetism by being woven with the copper wires or the aluminum wires, so that the strength of the optical cable core 210 can be improved, and the strength of the optical cable core 210 is effectively improved;
the heat shrink tube 300 is sleeved on the outer walls of the optical cable core strengthening layers 200, the optical cable core strengthening layers 200 are fixed on the outer wall of the central reinforcing rib 100 through the heat shrink tube 300, and the central reinforcing rib 100 is located in the middle of the whole optical cable, so that the tensile strength of the optical fiber cable is improved;
referring to fig. 1 again, the flame retardant rubber layer 400 is coated on the outer wall of the heat shrinkable tube 300, the flame retardant rubber layer 400 is formed by mixing any two or more of thermoplastic elastomer, unsaturated rubber, halogen-free flame retardant and additive, the thermoplastic elastomer is formed by mixing any two or more of ethylene-vinyl acetate copolymer, polyvinyl acetate, styrene-butadiene-styrene block copolymer, thermoplastic polyurethane and linear low density polyethylene, the unsaturated rubber is formed by mixing any two or more of ethylene propylene diene monomer, natural rubber, chloroprene rubber, styrene butadiene rubber, nitrile rubber, butadiene rubber and isoprene rubber, the halogen-free flame retardant is formed by mixing any two or more of aluminum hypophosphite, diethyl aluminum hypophosphite, melamine polyphosphate, melamine pyrophosphate, melamine cyanurate, red phosphorus, microcapsule-coated red phosphorus, pentaerythritol, and additives, Any two or more of ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide, triazine charring agent, zinc borate, carbon nano tubes and montmorillonite are mixed to improve the flame retardance of the optical fiber cable;
referring to fig. 1 and 3, the gas flame retardant layer 500 is coated on the outer wall of the flame retardant rubber layer 400, and the gas flame retardant layer 500 includes:
the inner coating 510 is coated on the outer wall of the flame-retardant rubber layer 400, and the inner coating 510 is made of butyl rubber, so that the inner coating has good elasticity and can play a role in damping;
the annular elastic bodies 520 are uniformly sleeved on the outer wall of the inner coating layer 510, the distance between every two adjacent annular elastic bodies 520 is equal, the annular elastic bodies 520 and the inner coating layer 510 are subjected to sealing treatment, and the annular elastic bodies 520 are butyl rubber;
the outer coating 530 is coated on the outer walls of the annular elastic bodies 520, sealing treatment is performed between the outer coating 530 and the annular elastic bodies 520, butyl rubber is coated on the outer coating 530, the optical fiber cable can be effectively damped by matching the outer coating 530, the annular elastic bodies 520 and the inner coating 510, damage to the optical fiber inside caused by impact force of the outer wall is avoided, the shock resistance of the optical fiber cable is improved, a plurality of sealed spaces are isolated from the inner coating 510 and the outer coating 530 through the annular elastic bodies 520, nitrogen or carbon dioxide gas is filled in the sealed spaces, when the optical fiber cable is ignited, the outer coating 530 is damaged, leakage of the nitrogen or carbon dioxide gas filled in the sealed spaces extinguishes surrounding open fire or reduces flame temperature, and flame retardance is performed through the flame retardant rubber layer 400 to play a flame retardant role;
referring to fig. 1 again, the armor layer 600 is coated on the outer wall of the gas flame retardant layer 500;
referring to fig. 1 again, the outer sheath 700 covers the outer wall of the armor 600.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A high-strength flame-retardant optical fiber cable is characterized in that: the method comprises the following steps:
a central reinforcing rib (100);
the optical cable core strengthening layers (200) are uniformly distributed on the outer wall of the central reinforcing rib (100);
the heat-shrinkable tube (300) is sleeved on the outer walls of the optical cable core strengthening layers (200);
the flame-retardant rubber layer (400), the flame-retardant rubber layer (400) is coated on the outer wall of the heat shrinkable tube (300);
the gas flame-retardant layer (500) is coated on the outer wall of the flame-retardant rubber layer (400);
the armor layer (600), the armor layer (600) is coated on the outer wall of the gas flame-retardant layer (500);
the outer protective layer (700), outer protective layer (700) cladding is on the outer wall of armor (600).
2. The high-strength flame-retardant optical fiber cable according to claim 1, wherein: the optical cable core strength layer (200) includes:
a cable core (210);
the inner protective layer (220) is coated on the outer wall of the optical cable core (210);
the shielding reinforcing layer (230) is coated on the outer wall of the inner sheath layer (220).
3. The high-strength flame-retardant optical fiber cable according to claim 2, wherein: the shielding reinforcing layer (230) is formed by weaving polyester fibers and copper wires or aluminum wires.
4. The high-strength flame-retardant optical fiber cable according to claim 1, wherein: the flame-retardant rubber layer (400) is formed by mixing a thermoplastic elastomer, unsaturated rubber, a halogen-free flame retardant and an additive.
5. The high-strength flame-retardant optical fiber cable according to claim 4, wherein: the thermoplastic elastomer is formed by mixing any two or more of ethylene-vinyl acetate copolymer, polyvinyl acetate, styrene-butadiene-styrene block copolymer, thermoplastic polyurethane and linear low-density polyethylene.
6. The high-strength flame-retardant optical fiber cable according to claim 4, wherein: the unsaturated rubber is prepared by mixing any two or more of ethylene propylene diene monomer, natural rubber, chloroprene rubber, styrene butadiene rubber, nitrile butadiene rubber, butadiene rubber and isoprene rubber.
7. The high-strength flame-retardant optical fiber cable according to claim 4, wherein: the halogen-free flame retardant is prepared by mixing any two or more of aluminum hypophosphite, diethyl aluminum hypophosphite, melamine polyphosphate, melamine pyrophosphate, melamine cyanurate, red phosphorus, microcapsule-coated red phosphorus, pentaerythritol, ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide, triazine charring agent, zinc borate, carbon nano tube and montmorillonite.
8. The high-strength flame-retardant optical fiber cable according to claim 1, wherein: the gas flame retardant layer (500) comprises:
an inner cladding layer (510);
the annular elastic bodies (520) are uniformly sleeved on the outer wall of the inner coating layer (510), the distance between every two adjacent annular elastic bodies (520) is equal, and the annular elastic bodies (520) and the inner coating layer (510) are subjected to sealing treatment;
and the outer coating (530) is coated on the outer walls of the annular elastic bodies (520), and sealing treatment is performed between the outer coating (530) and the annular elastic bodies (520).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351133.5A CN112485873A (en) | 2020-11-27 | 2020-11-27 | High-strength flame-retardant optical fiber cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351133.5A CN112485873A (en) | 2020-11-27 | 2020-11-27 | High-strength flame-retardant optical fiber cable |
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| CN112485873A true CN112485873A (en) | 2021-03-12 |
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| CN202011351133.5A Pending CN112485873A (en) | 2020-11-27 | 2020-11-27 | High-strength flame-retardant optical fiber cable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376780A (en) * | 2021-08-12 | 2021-09-10 | 南京华信藤仓光通信有限公司 | Physical adsorption temperature-resistant high-flame-retardant communication optical cable and manufacturing method thereof |
| CN113406756A (en) * | 2021-05-06 | 2021-09-17 | 江苏俊知光电通信有限公司 | Flame-retardant low-release object layer stranded optical cable and preparation method thereof |
| CN114752130A (en) * | 2022-05-12 | 2022-07-15 | 吕清倩 | High-elasticity optical cable and preparation method thereof |
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| CN114752130A (en) * | 2022-05-12 | 2022-07-15 | 吕清倩 | High-elasticity optical cable and preparation method thereof |
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Application publication date: 20210312 |