CN109254370B - Waterproof emergency optical cable - Google Patents
Waterproof emergency optical cable Download PDFInfo
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- CN109254370B CN109254370B CN201811443884.2A CN201811443884A CN109254370B CN 109254370 B CN109254370 B CN 109254370B CN 201811443884 A CN201811443884 A CN 201811443884A CN 109254370 B CN109254370 B CN 109254370B
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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
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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
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a waterproof emergency optical cable which comprises tight-buffered optical fibers, nonmetal reinforcing keys, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are glued with the nonmetal reinforcing keys; the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 80-100 parts of sodium acrylate, 30-40 parts of hydroxyl acrylate, 0.5-1 part of initiator, 2-4 parts of cross-linking agent, 1-2 parts of glycerol dimethacrylate, 200 parts of cyclohexane and 120 parts of distilled water. According to the invention, sodium acrylate and hydroxyl acrylate are subjected to rapid emulsion polymerization, so that the crosslinking degree of the core material is reduced, the high water absorption of the wrapping tape is improved, and meanwhile, the glyceryl dimethacrylate is taken as a second crosslinking agent, so that a shell structure with relatively compact crosslinking is formed at the periphery of the core material, and the compression resistance after swelling is improved.
Description
Technical Field
The invention relates to the technical field of optical cables, in particular to a waterproof emergency optical cable.
Background
The emergency optical cable is light, convenient and quick, is often used in emergency occasions such as fire fighting, emergency rescue, disaster relief and the like, and the using environment of the emergency optical cable is inferior, so that the requirements on the performance of the optical cable in all aspects are high, particularly the requirements on the water resistance and the good water resistance can be met, the normal communication can be guaranteed in the disaster relief process of fire fighting, emergency rescue and natural disasters, and the disaster relief efficiency is further improved. The existing waterproof emergency optical cable usually adopts water-blocking factice and water-blocking yarn to improve the waterproof performance of the optical cable, but the filling amount of the factice required by the optical cable is large, so that the optical cable has a heavy self weight, the mechanical performance of the optical cable is influenced, the friction force of each element of the optical cable is small, relative sliding is caused, accidents are easy to happen, and the environment is easy to pollute; the water-blocking yarn is easy to fall off powder, and the water-blocking performance needs to be enhanced.
Disclosure of Invention
The invention provides a method for modifying a belting material in an emergent optical cable, which comprises the steps of carrying out rapid emulsion polymerization on sodium acrylate and hydroxyl acrylate, reducing the crosslinking degree of a core material, improving the high water absorption of the belting, simultaneously adopting glyceryl dimethacrylate as a second crosslinking agent, forming a shell structure with relatively compact crosslinking on the periphery of the core material, and improving the compression resistance after swelling.
The invention provides a waterproof emergency optical cable which comprises tight-buffered optical fibers, a nonmetal reinforcement, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcement; the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 80-100 parts of sodium acrylate, 30-40 parts of hydroxyl acrylate, 0.5-1 part of initiator, 2-4 parts of cross-linking agent, 1-2 parts of glycerol dimethacrylate, 200 parts of cyclohexane and 120 parts of distilled water.
Preferably, the hydroxy acrylate is one or a mixture of more than two of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate and hydroxyethyl methacrylate.
Preferably, the initiator is potassium persulfate and/or sodium persulfate.
Preferably, the crosslinking agent is one of propylene glycol diacrylate, ethylene glycol dimethacrylate, propylene glycol dimethacrylate, and N-methylol acrylate.
Preferably, the preparation method of the water blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 120 ℃ for reaction at the temperature of 100 ℃ for 10-20min, cooling to 70-80 ℃, adding glycerol dimethacrylate, and continuously reacting for 1-2h to obtain the water-blocking material.
Preferably, in the preparation process of the water-blocking material, the temperature is raised to 100-120 ℃ within 5 min.
Preferably, the non-metallic reinforcement is made of fiber reinforced plastic or aramid fibers.
Preferably, the inner sheath and the outer sheath are both made of low smoke halogen-free flame retardant polyethylene.
The invention modifies the wrapping tape material in the emergent optical cable, improves the water-blocking and waterproof performance of the wrapping tape, wherein the water-blocking material is obtained by polymerizing two monomers, namely sodium acrylate and hydroxyl acrylate, the sodium acrylate has good hydrophilicity and water absorption performance, the hydroxyl acrylate has good reaction activity, and can rapidly react with acrylic acid at high temperature to obtain a copolymer with a loose structure, so that the water absorption performance of the material is improved. Because sodium acrylate and hydroxy acrylate have very high reactivity under the effect of bifunctional cross-linking agent, it is difficult to control the reaction rate in the aqueous system, further, the invention adopts emulsion polymerization, not only guarantee monomer react rapidly get low cross-linked structure guarantee water absorption performance, but also can control the reaction rate effectively and raise the reaction yield. After the optical cable is pulled, a loose core material is obtained through the emulsion, in order to ensure the overall mechanical property and the compressive property after water absorption and swelling of the optical cable tape, the glycerol dimethacrylate is further adopted as a second cross-linking agent, and the periphery of the core material is cross-linked to form a shell structure which is relatively compact in cross-linking, so that the compact structure outside and inside can ensure that the optical cable can effectively absorb the ambient water when encountering water so as to avoid the water from permeating into the cable core, meanwhile, the compact structure on the surface layer improves the anti-swelling property of the optical cable tape, and the good mechanical property can be maintained after absorbing water, thereby realizing the better protection effect.
Drawings
Fig. 1 is a schematic structural view of a waterproof emergency optical cable according to the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metallic reinforcement is made of fiber reinforced plastic;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 80 parts of sodium acrylate, 30 parts of hydroxyethyl acrylate, 0.5 part of potassium persulfate, 4 parts of propylene glycol diacrylate, 1 part of glycerol dimethacrylate, 200 parts of cyclohexane and 100 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 100 ℃ within 5min, reacting for 10min, cooling to 70 ℃, adding glycerol dimethacrylate, and continuously reacting for 2h to obtain the water-blocking material.
Example 2
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metal reinforcing piece is made of aramid fibers;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 100 parts of sodium acrylate, 40 parts of hydroxypropyl acrylate, 1 part of sodium persulfate, 2 parts of ethylene glycol dimethacrylate, 2 parts of glycerol dimethacrylate, 150 parts of cyclohexane and 120 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 100 ℃ within 5min, reacting for 20min, cooling to 70 ℃, adding glycerol dimethacrylate, and continuously reacting for 2h to obtain the water-blocking material.
Example 3
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metal reinforcing piece is made of aramid fibers;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 90 parts of sodium acrylate, 35 parts of hydroxyethyl methacrylate, 0.7 part of potassium persulfate, 3 parts of propylene glycol dimethacrylate, 1.5 parts of glycerol dimethacrylate, 180 parts of cyclohexane and 110 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 110 ℃ within 5min, reacting for 15min, cooling to 75 ℃, adding glycerol dimethacrylate, and continuously reacting for 1.5h to obtain the water-blocking material.
Example 4
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metal reinforcing piece is made of aramid fibers;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 95 parts of sodium acrylate, 20 parts of hydroxyethyl methacrylate, 15 parts of hydroxyethyl methacrylate, 0.8 part of potassium persulfate, 3.5 parts of N-hydroxymethyl acrylate, 1.5 parts of glycerol dimethacrylate, 180 parts of cyclohexane and 110 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 110 ℃ within 5min, reacting for 15min, cooling to 75 ℃, adding glycerol dimethacrylate, and continuously reacting for 1.5h to obtain the water-blocking material.
Comparative example 1
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metal reinforcing piece is made of aramid fibers;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 95 parts of sodium acrylate, 20 parts of hydroxyethyl methacrylate, 15 parts of hydroxyethyl methacrylate, 0.8 part of potassium persulfate, 3.5 parts of N-hydroxymethyl acrylate, 1.5 parts of glycerol dimethacrylate, 180 parts of cyclohexane and 110 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 70 ℃, reacting for 1h, cooling to 60 ℃, adding glycerol dimethacrylate, and continuously reacting for 1.5h to obtain the water-blocking material.
Comparative example 2
A waterproof emergency optical cable comprises tight-buffered optical fibers, nonmetal reinforcements, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcements;
the non-metal reinforcing piece is made of aramid fibers;
the inner layer sheath and the outer sheath are both made of low-smoke halogen-free flame-retardant polyethylene;
the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 95 parts of sodium acrylate, 20 parts of hydroxyethyl methacrylate, 15 parts of hydroxyethyl methacrylate, 0.8 part of potassium persulfate, 3.5 parts of N-hydroxymethyl acrylate, 180 parts of cyclohexane and 110 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 110 ℃ within 5min, and reacting for 30min to obtain the water-blocking material.
The water-blocking materials obtained in examples 1 to 3 and comparative examples 1 to 2 were tested for their water absorption properties, and the results are shown in the following table:
according to the data, the belting material in the emergency optical cable is modified, so that the water-blocking and waterproof performance of the belting is improved, wherein the water-blocking material is obtained by polymerizing two monomers, namely sodium acrylate and hydroxyl acrylate, the sodium acrylate has good hydrophilicity and water absorption performance, the hydroxyl acrylate has good reaction activity, and the hydroxyl acrylate and acrylic acid quickly have the effect of obtaining a copolymer with a loose structure at high temperature, so that the water absorption performance of the material is improved. Because sodium acrylate and hydroxy acrylate have very high reactivity under the effect of bifunctional cross-linking agent, it is difficult to control the reaction rate in the aqueous system, further, the invention adopts emulsion polymerization, not only guarantee monomer react rapidly get low cross-linked structure guarantee water absorption performance, but also can control the reaction rate effectively and raise the reaction yield. After the optical cable is pulled, a loose core material is obtained through the emulsion, in order to ensure the overall mechanical property and the compressive property after water absorption and swelling of the optical cable tape, the glycerol dimethacrylate is further adopted as a second cross-linking agent, and the periphery of the core material is cross-linked to form a shell structure which is relatively compact in cross-linking, so that the compact structure outside and inside can ensure that the optical cable can effectively absorb the ambient water when encountering water so as to avoid the water from permeating into the cable core, meanwhile, the compact structure on the surface layer improves the anti-swelling property of the optical cable tape, and the good mechanical property can be maintained after absorbing water, thereby realizing the better protection effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A waterproof emergency optical cable is characterized by comprising tight-buffered optical fibers, a nonmetal reinforcement, a wrapping tape, an inner sheath layer, a weave and an outer sheath, wherein a plurality of tight-buffered optical fibers are arranged on the inner side of the outer sheath and are twisted with the nonmetal reinforcement; the bag belt is made of a water-blocking material, and the water-blocking material comprises the following raw materials in parts by weight: 80-100 parts of sodium acrylate, 30-40 parts of hydroxyl acrylate, 0.5-1 part of initiator, 2-4 parts of cross-linking agent, 1-2 parts of glycerol dimethacrylate, 200 parts of cyclohexane and 120 parts of distilled water;
the preparation method of the water-blocking material comprises the following steps: uniformly stirring sodium acrylate, hydroxyl acrylate, an initiator, a cross-linking agent and distilled water to obtain a mixed solution, introducing nitrogen into cyclohexane, adding the mixed solution, heating to 100 ℃ and 120 ℃, reacting for 10-20min, cooling to 70-80 ℃, adding glycerol dimethacrylate, and continuously reacting for 1-2h to obtain a water blocking material;
the hydroxy acrylate is one or more of hydroxyethyl acrylate, hydroxypropyl acrylate and hydroxyethyl methacrylate;
the initiator is potassium persulfate and/or sodium persulfate;
the cross-linking agent is one of propylene glycol diacrylate, ethylene glycol dimethacrylate, propylene glycol dimethacrylate and N-hydroxymethyl acrylate.
2. The waterproof emergency optical cable as claimed in claim 1, wherein the temperature is raised to 100-120 ℃ within 5min during the preparation of the water blocking material.
3. The waterproof emergency optical cable of claim 1 wherein the non-metallic strength member is made of fiber reinforced plastic or aramid fiber.
4. The waterproof emergency optical cable of claim 1, wherein the inner and outer jacket layers are both made of low smoke, halogen free, flame retardant polyethylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811443884.2A CN109254370B (en) | 2018-11-29 | 2018-11-29 | Waterproof emergency optical cable |
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| CN201811443884.2A CN109254370B (en) | 2018-11-29 | 2018-11-29 | Waterproof emergency optical cable |
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| CN109254370B true CN109254370B (en) | 2020-10-02 |
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| CN101981070A (en) * | 2008-03-28 | 2011-02-23 | 大金工业株式会社 | Fluorine-containing polymer and water- and oil-repellent agent |
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