CN113322677B - Reinforced heat-resistant optical cable filler and preparation method thereof - Google Patents
Reinforced heat-resistant optical cable filler and preparation method thereof Download PDFInfo
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- CN113322677B CN113322677B CN202110602900.3A CN202110602900A CN113322677B CN 113322677 B CN113322677 B CN 113322677B CN 202110602900 A CN202110602900 A CN 202110602900A CN 113322677 B CN113322677 B CN 113322677B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/325—Amines
- D06M13/335—Amines having an amino group bound to a carbon atom of a six-membered aromatic ring
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/16—Yarns or threads made from mineral substances
- D02G3/20—Yarns or threads made from mineral substances from asbestos
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
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- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
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- D10B2101/04—Asbestos
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Abstract
The invention belongs to the field of optical cables, and particularly relates to a reinforced heat-resistant optical cable filler and a preparation method thereof. The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps: 1) soaking long fiber asbestos spun yarn in molten liquid paraffin, cutting the asbestos spun yarn into asbestos/paraffin mixed short fiber after the asbestos spun yarn is completely soaked, mixing the short fiber with asbestos powder and asbestos yarn, and twisting to form fine asbestos thread; 2) wetting the surface of the asbestos fine wire by using an alcoholic solution of 4-chloro-o-phenylenediamine, drying at a low temperature after wetting, repeating until the seam is completely filled, and sealing at a low temperature to obtain a modified closed fine wire; 3) and wetting the surface of the modified closed fine line by using a polyamide curing agent, drying at a low temperature after wetting, repeating until the surface is smooth, pre-curing at a low temperature, and curing at a high temperature to obtain the reinforced heat-resistant optical cable filler. The preparation method is simple and efficient, mass production is convenient, and the prepared filler can effectively block heat conduction of the optical cable from outside to inside and avoid overheating of the optical cable.
Description
Technical Field
The invention belongs to the field of optical cables, and particularly relates to a reinforced heat-resistant optical cable filler and a preparation method thereof.
Background
The optical cable filler is a filler which is commonly used in optical cables and achieves the technical effects of buffering, pressure resistance and the like. Common optical cable fillers such as aramid yarn, flame-retardant PVC, glass fiber yarn, water-blocking ointment, flame-retardant ointment and the like. The filling material can realize the buffering and pressure-resistant effects, and can further realize the special effects of moisture resistance, flame retardance and the like.
However, there is no special filler for enhancing the heat resistance of the optical cable. The filler which is generally satisfactory for enhancing the heat resistance of the optical cable is asbestos yarn.
However, relying on asbestos yarn alone does not significantly improve the heat resistance of the cable. In the case of optical cables affected by intense heat, the structure and properties of the optical fiber itself are not easily affected, but the coating on the surface of the optical fiber is easily affected by intense heat, resulting in the performance of the optical cable being affected.
Disclosure of Invention
The invention provides a reinforced heat-resistant optical cable filler and a preparation method thereof, aiming at solving the problems that the existing optical cable filler does not provide the optical cable with good heat resistance, but the existing optical cable filler cannot provide the optical cable with good heat resistance, and the optical cable performance is reduced due to the fact that an optical fiber coating is damaged due to long-term heating in the existing optical cable in partial hot areas.
The invention aims to:
firstly, the heat resistance of the optical cable can be obviously improved;
and secondly, the form of the existing optical cable filler is maintained, so that the optical cable filler can be well applied to optical cables of existing specifications and models.
In order to achieve the purpose, the invention adopts the following technical scheme.
A method for preparing reinforced heat-resistant optical cable filler,
the method comprises the following steps:
1) soaking long fiber asbestos spun yarn in molten liquid paraffin, cutting the asbestos spun yarn into asbestos/paraffin mixed short fiber after the asbestos spun yarn is completely soaked, mixing the short fiber with asbestos powder and asbestos yarn, and twisting to form fine asbestos thread;
2) wetting the surface of the asbestos fine wire by using an alcoholic solution of 4-chloro-o-phenylenediamine, drying at a low temperature after wetting, repeating until the seam is completely filled, and sealing at a low temperature to obtain a modified closed fine wire;
3) and wetting the surface of the modified closed fine line by using a polyamide curing agent, drying at a low temperature after wetting, repeating until the surface is smooth, pre-curing at a low temperature, and curing at a high temperature to obtain the reinforced heat-resistant optical cable filler.
In the technical scheme of the invention, the melted liquid paraffin is adsorbed and then sheared by the long fiber asbestos spun yarn, then the short fiber soaked with the paraffin is coated and twisted by the asbestos powder and the asbestos yarn, the soaked paraffin is preliminarily fixed, and the twisting process can avoid the paraffin from being condensed and crystallized to form large particles so as to avoid the problems of obvious granular feeling and extrusion to the optical cable core wire during use. And then, the paraffin is initially sealed by 4-chloro-o-phenylenediamine, so that the paraffin is completely fixed, the flame retardant property of the filler is kept, dehalogenation can be effectively realized in the sealing process, and the halogen pollution in the using process of the filler is reduced. However, since the modified closed fine wire obtained by actually performing only primary closing has a certain hardness and brittleness and has a limited practical use effect, the modified closed fine wire is subjected to secondary wet curing again to improve the flexibility and elasticity of the filler, ensure the use effect thereof, and have more excellent heat resistance.
The filling material can realize step-type thermal cutoff in the actual use process. The stepped heat blocking effect is mainly derived from paraffin, the paraffin has the characteristic of high specific heat capacity, and good overheating prevention effect can be realized through phase change heat absorption of the paraffin in the actual use process. However, secondary blocking is critical to achieving stability of filler properties.
As a preference, the first and second liquid crystal compositions are,
the liquid paraffin in the step 1) is prepared by mixing multiple kinds of paraffin with the melting point of 48-56 ℃.
According to the invention, the paraffin with the melting point of 48 ℃, the paraffin with the melting point of 52 ℃ and the paraffin with the melting point of 56 ℃ are preferably mixed according to the mass ratio of 4:3:3, so that good stepped phase change buffering heat insulation can be realized. The fiber coating on the outer surface of the fiber is not susceptible to temperature conditions of 56 c and below.
As a preference, the first and second liquid crystal compositions are,
the length of the short fiber in the step 1) is less than or equal to 20 mm.
The use of short fibers of the above lengths can produce a relatively superior twist and effect.
As a preference, the first and second liquid crystal compositions are,
in the step 1), the mass ratio of the short fibers to the asbestos powder to the asbestos yarns is 1 (0.1-0.3): (0.7 to 0.9);
the wire diameter of the asbestos thin wire prepared in the step 1) is less than or equal to 0.8 mm.
The prepared filler can be well suitable for the small-wire-diameter optical cable.
As a preference, the first and second liquid crystal compositions are,
step 2), carrying out low-temperature drying and low-temperature sealing at 15-35 ℃;
and 2) drying at low temperature for 20-60 min, and sealing at low temperature for 3-6 h.
Adopt the low temperature of above-mentioned temperature to seal and dry, all avoid melting of paraffin to lead to the separation, seal the back through preliminary low temperature, can realize the preliminary fixed of paraffin, reduce paraffin and run off.
As a preference, the first and second liquid crystal compositions are,
and 2) repeating the wetting and low-temperature drying cycles for 2-5 times.
The solubility of the 4-chloro o-phenylenediamine in ethanol is limited, and the technical scheme of the invention adopts 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, so that the actual sealing amount is limited in single wetting. And therefore needs to be repeated several times.
As a preference, the first and second liquid crystal compositions are,
step 3), the low-temperature drying temperature is 35-50 ℃;
and 3) drying at low temperature for 15-20 min.
After paraffin is fixed through primary sealing, secondary sealing at higher temperature can be performed.
As a matter of preference,
step 3), the low-temperature pre-curing temperature is 60-80 ℃, and the low-temperature pre-curing is carried out for 30-45 min;
and 3) carrying out high-temperature curing at 100-120 ℃ for 60-90 min.
The secondary curing is carried out after secondary sealing, so that the characteristics of the polyamide curing agent can be effectively exerted, and the flexibility and elasticity of the filler are improved.
The reinforced heat-resistant optical cable filler prepared by the method.
The filler prepared by the method can effectively realize phase change heat insulation, avoids overheating of the optical cable through the characteristic of constant-temperature phase change, and blocks heat transfer from outside to inside to a certain extent.
The invention has the beneficial effects that:
1) the preparation method is simple and efficient, and is convenient for mass production;
2) the heat conduction of the optical cable from the outside to the inside can be effectively cut off, and the optical cable is prevented from being overheated;
3) the heat insulation effect is controllable and adjustable, and can be adjusted according to the actual use requirement;
4) the optical cable is suitable for the existing optical cable.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to specific examples. Those skilled in the art will be able to practice the invention based on these descriptions. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.
Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.
Example 1
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:3:3, melting the mixture in a water bath at 65 ℃, shearing the mixture into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting to form asbestos thin wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos fine wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to put the asbestos fine wire into the 4-chloro-o-phenylenediamine ethanol solution for soaking for 10min, dry the asbestos fine wire at a low temperature of 30 ℃ for 40min after wetting, perform low-temperature sealing at a low temperature of 30 ℃ for 4h after repeating 3 times of soaking and low-temperature drying, and obtain a modified sealed fine wire;
3) wetting the surface of the modified closed fine line by using a Versamid115 type curing agent, drying at a low temperature of 45 ℃ for 15min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 65 ℃ for 35min, and then curing at a high temperature of 115 ℃ for 60min to obtain the reinforced heat-resistant optical cable filler.
Example 2
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long-fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:3:3, melting the liquid paraffin with a melting point of 48 ℃, 52 ℃ and 56 ℃ in water bath at 65 ℃, cutting the asbestos spun yarns into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.1:0.9, and twisting to form fine asbestos wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos fine wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to put the asbestos fine wire into the 4-chloro-o-phenylenediamine ethanol solution for soaking for 10min, dry the asbestos fine wire at a low temperature of 15 ℃ for 60min after wetting, perform low-temperature sealing at a low temperature of 15 ℃ for 6h after repeating soaking and low-temperature drying for 5 times, and obtain a modified sealed fine wire;
3) wetting the surface of the modified closed fine line by using a Versamid115 type curing agent, drying at a low temperature of 35 ℃ for 20min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 60 ℃ for 45min, and curing at a high temperature of 100 ℃ for 90min to obtain the reinforced heat-resistant optical cable filler.
Example 3
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a melting point of 48 ℃, paraffin with a melting point of 52 ℃ and paraffin with a melting point of 56 ℃ in a mass ratio of 4:3:3, melting the mixture in a water bath condition of 65 ℃, cutting the mixture into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.3:0.7, and twisting the short fibers to form fine asbestos wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos fine wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to put the asbestos fine wire into the 4-chloro-o-phenylenediamine ethanol solution for soaking for 10min, dry the asbestos fine wire at the low temperature of 35 ℃ for 20min after wetting, perform low-temperature sealing at the low temperature of 35 ℃ for 3h after repeating soaking and low-temperature drying for 2 times, and obtain a modified sealed fine wire;
3) wetting the surface of the modified closed fine line by using a Versamid115 type curing agent, drying at a low temperature of 50 ℃ for 15min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 80 ℃ for 30min, and then curing at a high temperature of 120 ℃ for 60min to obtain the reinforced heat-resistant optical cable filler.
Example 4
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:4:2, melting the liquid paraffin at a temperature of 48 ℃, 52 ℃ and 56 ℃ in water bath at a temperature of 65 ℃, cutting the asbestos spun yarns into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting to form fine asbestos wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos fine wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to put the asbestos fine wire into the 4-chloro-o-phenylenediamine ethanol solution for soaking for 10min, dry the asbestos fine wire at a low temperature of 30 ℃ for 40min after wetting, perform low-temperature sealing at a low temperature of 30 ℃ for 4h after repeating 3 times of soaking and low-temperature drying, and obtain a modified sealed fine wire;
3) wetting the surface of the modified closed fine line by using a Versamid115 type curing agent, drying at a low temperature of 45 ℃ for 15min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 65 ℃ for 35min, and then curing at a high temperature of 115 ℃ for 60min to obtain the reinforced heat-resistant optical cable filler.
Example 5
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 5:5 and 52 ℃ melting point paraffin and 56 ℃ melting point paraffin, melting the mixture in a 65 ℃ water bath condition, cutting the mixture into 15 mm-long asbestos/paraffin mixed short fibers after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting the mixture to form fine asbestos wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos fine wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to put the asbestos fine wire into the 4-chloro-o-phenylenediamine ethanol solution for soaking for 10min, dry the asbestos fine wire at a low temperature of 30 ℃ for 40min after wetting, perform low-temperature sealing at a low temperature of 30 ℃ for 4h after repeating 3 times of soaking and low-temperature drying, and obtain a modified sealed fine wire;
3) wetting the surface of the modified closed fine line by using a Versamid115 type curing agent, drying at a low temperature of 45 ℃ for 15min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 65 ℃ for 35min, and then curing at a high temperature of 115 ℃ for 60min to obtain the reinforced heat-resistant optical cable filler.
Comparative example 1
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:3:3, melting the mixture in a water bath at 65 ℃, shearing the mixture into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting the short fibers to form asbestos thin wires with a wire diameter of 0.8mm, namely the reinforced heat-resistant optical cable filler.
Comparative example 2
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:3:3, melting the mixture in a water bath at 65 ℃, shearing the mixture into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting to form asbestos thin wires with a wire diameter of 0.8 mm;
2) wetting the surface of the asbestos thin wire by using a 0.5 mol/L4-chloro-o-phenylenediamine ethanol solution, wherein the wetting operation is to immerse the asbestos thin wire in the 4-chloro-o-phenylenediamine ethanol solution for 10min, dry the asbestos thin wire at a low temperature of 30 ℃ for 40min after wetting, perform low-temperature sealing at a low temperature of 30 ℃ for 4h after repeating 3 times of soaking and low-temperature drying, and obtain a modified sealed thin wire, namely the reinforced heat-resistant optical cable filler.
Comparative example 3
The preparation method of the reinforced heat-resistant optical cable filler comprises the following steps:
1) soaking long fiber asbestos spun yarns in molten liquid paraffin for 40min, mixing the liquid paraffin with a mass ratio of 4:3:3, melting the mixture in a water bath at 65 ℃, shearing the mixture into asbestos/paraffin mixed short fibers with a length of about 15mm after the asbestos spun yarns are completely soaked, mixing the short fibers with asbestos powder and asbestos yarns in a mass ratio of 1:0.2:0.8, and twisting to form asbestos thin wires with a wire diameter of 0.8 mm;
2) wetting the surface of an asbestos fine wire by using a Versamid115 type curing agent, drying at a low temperature of 45 ℃ for 15min after wetting, repeatedly infiltrating and drying at a low temperature until the surface is smooth, pre-curing at a low temperature of 65 ℃ for 35min, and then curing at a high temperature of 115 ℃ for 60min to obtain the reinforced heat-resistant optical cable filler.
Comparative example 4
A commercially available asbestos yarn cable filler.
The reinforced heat-resistant optical cable fillers prepared in the above examples and comparative examples were tested.
The prepared and purchased filler is used for replacing the filler in the Futong GYTS 36B 1-layer stranded armored cable, and the thermal resistance wires with equal wire diameters are used for replacing the optical fibers in the Futong GYTS 36B 1-layer stranded armored cable to prepare a test optical cable for carrying out a thermal sensing test.
The method comprises the steps of setting an open experiment cabin with the height of 4m, installing a heat lamp (a bath lamp) at the top of the experiment cabin to simulate sunshine in natural environment, heating the temperature with the height of 1.5m in the experiment cabin to 42-44 ℃ when the heat lamp generates heat, erecting the test optical cable, enabling the erecting height of the test optical cable to be 2.5m, monitoring the temperature of the outer surface of the test optical cable by using an infrared thermometer, and calculating the temperature inside the optical cable by using a thermal resistance wire after 6 hours. The following data were obtained by testing. And a conventional futong GYTS 36B1 layer stranded armored cable was used as a blank control.
| Test cable numbering | Exterior temperature | Internal temperature | Test cable numbering | Exterior temperature | Internal temperature |
| Example 1 | 57℃ | 30℃ | Comparative example 1 | 57℃ | 48℃ |
| Example 2 | 57℃ | 32℃ | Comparative example 2 | 57℃ | 46℃ |
| Example 3 | 58℃ | 32℃ | Comparative example 3 | 57℃ | 42℃ |
| Example 4 | 57℃ | 30℃ | Comparative example 4 | 56℃ | 49℃ |
| Example 5 | 57℃ | 35℃ | Blank control | 57℃ | 54℃ |
As is apparent from the data in the table, the reinforced heat-resistant optical cable filler prepared by the invention has very excellent heat resistance effect. Furthermore, it is apparent from comparing example 1 with example 5 that the selection of the paraffin wax has a significant effect on the heat resistance effect that the reinforced heat-resistant optical cable filler can produce. The actual orthogonal test shows that the proportion of paraffin with a melting point of 48 ℃ in the liquid paraffin is 40-60 wt%, the proportion of paraffin with a melting point of 50-52 ℃ is 25-40 wt%, and the balance is paraffin with a melting point of 54-56 ℃, and the proportion of paraffin with a melting point of 54-56 ℃ is at least 10 wt%.
In addition, compared with the comparative example 1, the comparative example 1 has obvious paraffin marks at the fracture after the test, which shows that the actual paraffin generates obvious loss, and the thermal resistance of the reinforced heat-resistant optical cable filler is rapidly reduced after the paraffin which is not encapsulated and fixed is lost, and the performance is close to that of the conventional asbestos yarn, as in the comparative example 4. And the comparative example 2 is only sealed and fixed once, so that obvious paraffin loss exists, and meanwhile, the reinforced heat-resistant optical cable filler of the comparative example 2 has obvious brittleness, is broken and crushed in a large amount in the filling process, so that the actual filling effect is poor. The comparative example 3 has a small amount of paraffin loss, which shows that the preliminary sealing of the step 2) is not carried out, and the fixed retention effect of the paraffin is obviously influenced.
The result shows that the reinforced heat-resistant optical cable filler prepared by the invention has good heat resistance and heat resistance, can effectively prevent the occurrence of overheating inside an optical cable, and in addition, the two-step sealing process has important significance for maintaining the stability of the reinforced heat-resistant optical cable filler and is absolutely indispensable.
Claims (9)
1. A preparation method of reinforced heat-resistant optical cable filler is characterized in that,
the method comprises the following steps:
1) soaking long fiber asbestos spun yarn in molten liquid paraffin, cutting the asbestos spun yarn into asbestos/paraffin mixed short fiber after the asbestos spun yarn is completely soaked, mixing the short fiber with asbestos powder and asbestos yarn, and twisting to form fine asbestos thread;
2) wetting the surface of the asbestos fine wire by using an alcoholic solution of 4-chloro-o-phenylenediamine, drying at a low temperature after wetting, repeating until the seam is completely filled, and sealing at a low temperature to obtain a modified closed fine wire;
3) and wetting the surface of the modified closed fine line by using a polyamide curing agent, drying at a low temperature after wetting, repeating until the surface is smooth, pre-curing at a low temperature, and curing at a high temperature to obtain the reinforced heat-resistant optical cable filler.
2. The method of claim 1, wherein the filler for reinforced heat-resistant optical cable is prepared by mixing the filler for reinforced heat-resistant optical cable,
the liquid paraffin in the step 1) is prepared by mixing multiple kinds of paraffin with the melting point of 48-56 ℃.
3. The method of claim 1, wherein the filler for reinforced heat-resistant optical cable is prepared by mixing the filler for reinforced heat-resistant optical cable,
the length of the short fiber in the step 1) is less than or equal to 20 mm.
4. The method of claim 1, wherein the filler for reinforced heat-resistant optical cable is prepared by mixing the filler for reinforced heat-resistant optical cable,
in the step 1), the mass ratio of the short fibers to the asbestos powder to the asbestos yarns is 1 (0.1-0.3): (0.7 to 0.9);
the wire diameter of the asbestos thin wire prepared in the step 1) is less than or equal to 0.8 mm.
5. The method of claim 1, wherein the filler for reinforced heat-resistant optical cable is prepared by mixing the filler for reinforced heat-resistant optical cable,
step 2), carrying out low-temperature drying and low-temperature sealing at 15-35 ℃;
and 2) drying at low temperature for 20-60 min, and sealing at low temperature for 3-6 h.
6. The method for preparing a reinforced heat-resistant optical cable filler according to claim 1 or 5,
and 2) repeating the wetting and low-temperature drying cycles for 2-5 times.
7. The method of claim 1, wherein the filler for reinforced heat-resistant optical cable is prepared by mixing the filler for reinforced heat-resistant optical cable,
step 3), the low-temperature drying temperature is 35-50 ℃;
and 3) drying at low temperature for 15-20 min.
8. The method for preparing a reinforced heat-resistant optical cable filler according to claim 1 or 7,
step 3), the low-temperature pre-curing temperature is 60-80 ℃, and the low-temperature pre-curing is carried out for 30-45 min;
and 3) carrying out high-temperature curing at 100-120 ℃ for 60-90 min.
9. A reinforced heat resistant cable filler made by the method of any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110602900.3A CN113322677B (en) | 2021-05-31 | 2021-05-31 | Reinforced heat-resistant optical cable filler and preparation method thereof |
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| CN202110602900.3A CN113322677B (en) | 2021-05-31 | 2021-05-31 | Reinforced heat-resistant optical cable filler and preparation method thereof |
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| CN113322677B true CN113322677B (en) | 2022-05-03 |
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| CN202110602900.3A Active CN113322677B (en) | 2021-05-31 | 2021-05-31 | Reinforced heat-resistant optical cable filler and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1098640A (en) * | 1975-04-14 | 1981-03-31 | Floyd Wilson, Jr. | Insulated glass and sealant therefore |
| CN106703311A (en) * | 2016-12-22 | 2017-05-24 | 安徽易有墙纸有限公司 | Heat-resisting waterproof wallpaper and production method thereof |
| CN110646903A (en) * | 2019-09-10 | 2020-01-03 | 安徽省通信产业服务有限公司 | Preparation method of reinforced heat-resistant optical cable material filler |
| CN112500652A (en) * | 2020-11-23 | 2021-03-16 | 徐本戊 | Anti-aging corrosion-resistant outdoor optical cable and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102378834A (en) * | 2009-01-30 | 2012-03-14 | 帝人株式会社 | Graphitized short fibers and composition thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1098640A (en) * | 1975-04-14 | 1981-03-31 | Floyd Wilson, Jr. | Insulated glass and sealant therefore |
| CN106703311A (en) * | 2016-12-22 | 2017-05-24 | 安徽易有墙纸有限公司 | Heat-resisting waterproof wallpaper and production method thereof |
| CN110646903A (en) * | 2019-09-10 | 2020-01-03 | 安徽省通信产业服务有限公司 | Preparation method of reinforced heat-resistant optical cable material filler |
| CN112500652A (en) * | 2020-11-23 | 2021-03-16 | 徐本戊 | Anti-aging corrosion-resistant outdoor optical cable and preparation method thereof |
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