WO2018090389A1

WO2018090389A1 - Low-friction optical fiber cable and manufacturing method therefor

Info

Publication number: WO2018090389A1
Application number: PCT/CN2016/107124
Authority: WO
Inventors: 顾利国; 孙义兴; 薛梦驰; 张建峰; 沈小红; 吴俊雄; 轩传吴; 罗斌; 薄驰帆; 范毅杰
Original assignee: 江苏亨通光电股份有限公司
Priority date: 2016-11-16
Filing date: 2016-11-24
Publication date: 2018-05-24
Also published as: CN106383391A; CN106383391B

Abstract

A low-friction optical fiber cable and a manufacturing method therefor. An optical fiber cable (1) comprises a loose tube (3) having a plurality of built-in optical fibers (2) and at least two reinforced cords (4), water blocking paste (5) being filled between the optical fibers (2) and the loose tube (3), a sheathing layer (6) covering the outer surface of the loose tube (3) and the reinforced cords (4), the outer surface of the sheathing layer (6) being coated with a low-friction coating (7), the low-friction coating (7) being formed by thermocuring a low-friction coating material, the low-friction coating material being a mix of the components with the following parts by weight: 40-60 parts by weight of polytetrafluoroethylene emulsion, 20-30 parts by weight of octadecyl methacrylate, 18-25 parts by weight of perfluorooctylethyl methacrylate, 15-20 parts by weight of polyether, 10-15 parts by weight of trimethylolpropane, 8-10 parts by weight of isocyanate, 5-8 parts by weight of silicon dioxide, and 3-5 parts by weight of titanium dioxide. The optical fiber cable has comparatively low friction, suitable rigidity and light weight, and can realize the pushing of cables within 110 m into a duct, as for the current communication manhole distance within 110 m and community connection within 50 m, without the need of pulling by a pulling rope, not only reducing the number of required construction personnel, but also being safer and more reliable in relation to both the newly laid cable and the previously laid cable.

Description

Low-friction fiber optic cable and manufacturing method thereof

Technical field

The invention relates to a low-friction fiber optic cable and a manufacturing method thereof, and relates to the technical field of optical fiber cables.

Background technique

In the construction process of urban FTTH, the optical cable is manually pulled by the optical cable to realize the wiring, and the following problems exist:

1. During the construction, it is necessary to wear the traction rope first, then fix the optical cable with the traction rope, guide the optical cable by pulling the traction rope, and complete the laying of the optical cable in the pipeline;

2. If there is already a cable installed in the pipeline, because the traction rope will form an impact on the already-applied cable, after the traction rope is pulled on the fixed cable, the cable will be pulled in the process of pulling the cable with the traction rope. The impact of the cable on the cable has been laid.

3. The sheath of the traditional optical cable is affected by the extrusion die, the smoothness changes greatly, and the frictional resistance is also large. When the pipeline is pulled, if the optical cable exists in the pipeline, it will not only affect the cable that has been laid, but also the newly laid fiber cable. It will also have a large impact and there are security risks.

Summary of the invention

The object of the present invention is to provide a low-friction fiber optic cable and a method for manufacturing the same, the low-friction fiber optic cable has low friction characteristics, and is suitable in rigidity and light weight, and the distance between the current communication well is within 110 m, and the cell access is within 50 m. It can meet the push of the optical cable within 110m within the pipeline, without the traction of the traction rope, not only the personnel during construction is greatly reduced, but also the laying of the optical cable and the already laid optical cable is more secure and reliable; at the same time, providing a low-friction optical fiber for the above-mentioned The manufacturing method of the optical cable.

In order to achieve the above object, the optical fiber cable technical solution adopted by the present invention is: a low-friction optical fiber cable comprising a loose tube with a plurality of optical fibers and at least two reinforcing wires, and a manufacturing method thereof. A water blocking paste is filled between the loose tube, a sheath layer is coated on the outer surface of the loose tube and the reinforcing rope, and the outer surface of the sheath layer is coated with a low friction coating, and the low friction coating is composed of The low friction coating is thermally cured. The low friction coating consists of the following components by weight:

The silica and the titanium dioxide each have a diameter of 50 nm to 200 nm.

The solution for further improvement in the above technical solution is as follows:

1. In the above aspect, the low friction coating has a thickness of 0.06 mm to 0.15 mm.

2. In the above solution, the optical fiber has a diameter of 245 μm ± 15 μm or an optical fiber having a diameter of 200 μm ± 15 μm.

3. In the above solution, the loose tube is a polypropylene loose tube, a polybutylene terephthalate loose tube, a nylon loose tube or a polycarbonate loose tube.

4. In the above solution, the reinforcing rope is a glass fiber rod, a 304 stainless steel wire, a copper plated steel wire or a phosphating steel wire.

5. In the above aspect, the reinforcing cord has a diameter ranging from 0.6 mm to 3.0 mm.

In order to achieve the above object, the technical solution of the manufacturing method adopted by the present invention is: a manufacturing method for the above-mentioned low-friction fiber optic cable, the manufacturing method is based on a coating device including an infiltration mechanism, an air compressor, a paint storage tank and a heat curing mechanism for storing a low friction paint, the paint storage tank is connected at one end to the air compressor, and the other end is connected to the wetting mechanism by a pipe, and the heat curing mechanism is located at the outlet side of the wetting mechanism. An air pressure regulating valve is mounted on the pipe between the air compressor and the paint storage tank; the wetting mechanism further includes a casing, a wetting tank, an inlet mold and an outlet wiper, the wetting tank is located in the casing, The inlet die and the outlet wiper die are respectively mounted on the front end face and the rear end face of the casing, and the paint storage tank is connected to the casing of the wetting mechanism by a pipe;

The manufacturing method includes the following steps:

Step 1. Driven by the compressed air generated by the air compressor, the low-friction paint located in the paint storage tank passes through the pipeline into the wetting tank of the wetting mechanism, which in turn passes through the inlet mold, the wetting tank and the outlet wipe mold of the wetting mechanism. Therefore, the fiber optic cable is coated with a low friction coating layer having a pressure of 0.1 MPa to 1 MPa; the low friction coating is composed of the following components by weight: 40 to 60 parts of the polytetrafluoroethylene emulsion, methacrylic acid 20-30 parts of octadecyl ester, 18-25 parts of perfluorooctyl methacrylate, 15-20 parts of polyether, 10-15 parts of trimethylolpropane, 8-10 parts of isocyanate, 5~10 of silica 8 parts, 3 to 5 parts of titanium dioxide;

Step 2: The fiber optic cable coated with the low friction coating layer is subjected to a heat curing mechanism to form a low friction coating on the outer surface of the fiber optic cable. The length of the heat curing mechanism is between about 1 m and 5 m, and the temperature is between 120 and 250 ° C.

1. In the above solution, before the step 1, the optical fiber cable is also subjected to a cleaning process, and the cleaning process is aligned by the four cone air blowing guns at a 90° interval on the surface of the fiber optic cable, and the diameter of the air blowing nozzle is 1 mm. Between ~5mm, the distance between the fiber optic cable is between 5mm and 40mm.

2. In the above solution, the air pressure of the dry air formed by the cone air blowing gun is 0.1 MPa to 1 MPa, the temperature is 60 ° C ± 5 ° C, and the humidity is not more than 30%.

Due to the application of the above technical solutions, the present invention has the following advantages and effects compared with the prior art:

The invention relates to a low-friction fiber optic cable and a manufacturing method thereof, which develop a novel low-friction fiber optic cable which is formed by using a specific component to form a low friction coating and then thermally cured to form a low friction coating on the outer surface of the sheath layer. It has low friction characteristics, reasonable rigidity and light weight. For the current communication well, the distance between the wells is less than 110m, and the cell access is within 50m, which can meet the push of the optical cable within 110m within the pipeline, without pulling the traction rope, not only during construction. The number of personnel is greatly reduced, and the laid fiber cable and the already-applied fiber optic cable are safer and more reliable. At the same time, the cable laying can be carried out by manual or mechanical pushing, and the conventional artificial traction laying or air blowing laying is still applicable, and because the invention has low The friction characteristics make the manual migration laying faster and more convenient than the traditional optical cable, and the safety is higher; the test results are as follows: (1) The flat cable is tested by the static friction test device, and the static friction coefficient is 0.21; (2) the flat cable is statically rubbed. The test device was tested for wear resistance, and the coefficient of friction after 100 times was 0.24; (3) According to GB/T 7424.2-20 In the test mode of E17B in 08, the length of the L segment is between 0.5m, the range of the force is between 0.49N, and the rigidity of the cable is between 0.52Nm2. (4) The push performance of the cable: in the pipe with an inner diameter of 20mm. The "push performance test of optical cable" defined by the invention is tested, and one end of the optical cable can be pushed from the A end position to the B end position within 30 min; (5) the static friction coefficient is less than 0.25, and the firmness is reliable, and the test is performed in FIG. When the wear test is carried out under the device, the tested optical cable is re-stretched 100 times under a pressure of 25 N and then re-tested for its static friction coefficient, requiring that the static friction coefficient does not change by more than 20%.

DRAWINGS

1 is a schematic structural view 1 of a low-friction fiber optic cable of the present invention;

2 is a schematic structural view 2 of a low friction optical fiber cable of the present invention;

Figure 3 is a schematic structural view of a coating apparatus based on the manufacturing method of the present invention;

Figure 4 is a partial structural view of Figure 3;

Figure 5 is a schematic view showing the detection of a conventional flat-shaped external optical fiber cable;

6 is a schematic view showing the detection of a conventional circular external optical fiber cable;

Figure 7 is a schematic view of a conventional push test tube road.

In the above drawings: 1, optical fiber cable; 2, optical fiber; 3, loose tube; 4, reinforcing rope; 5, water blocking paste; 6, sheath layer; 7, low friction coating; 9, infiltration mechanism; 91, housing; 92, wetting tank; 93, inlet mold; 94, outlet wiping mold; 10, air compressor; 11, paint storage tank; 12, heat curing mechanism; Regulating valve; 14, conical air blowing gun.

detailed description

The present invention is further described below in conjunction with the embodiments:

Embodiments 1 to 5: a low-friction fiber optic cable including a plurality of optical fibers 2 built therein a loose tube 3 and at least two reinforcing cords 4, the optical fiber 2 and the loose tube 3 are filled with a water-blocking paste 5, and a sheathing layer 6 is coated on the outer surfaces of the loose tube 3 and the reinforcing rope 4. The outer surface of the sheath layer 6 is coated with a low friction coating 7 which is thermally cured by a low friction coating composed of the following components by weight, as shown in Table 1. Shown as follows:

Table 1

The silica and the titanium dioxide have a diameter of 50 nm to 200 nm.

The low friction coating 7 of Embodiment 1 has a thickness of 0.08 mm; the optical fiber 2 has a diameter of 245 μm; the loose tube 3 is a polypropylene loose tube; the reinforcing rope 4 is a fiberglass rod; and the diameter of the reinforcing rope 4 is The size range is 0.8mm.

The low friction coating 7 of Example 2 has a thickness of 0.1 mm; the optical fiber 2 has an optical fiber diameter of 200 μm ± 15 μm; the loose tube 3 is a polybutylene terephthalate loose tube; and the reinforcing cord 4 is 304 stainless steel wire; the diameter of the above reinforcing cord 4 is 1.2 mm in size.

The low friction coating 7 of Example 3 has a thickness of 0.12 mm; the optical fiber 2 has an optical fiber diameter of 200 μm ± 15 μm; the loose tube 3 is a nylon loose tube; the reinforcing rope 4 is a copper plated steel wire; The diameter is in the range of 2.2 mm.

The low friction coating 7 of Example 4 has a thickness of 0.14 mm; the optical fiber 2 has a diameter of 245 μm ± 15 μm; the loose tube 3 is a polycarbonate loose tube; the reinforcing rope 4 is a phosphating steel wire; The diameter of 4 is a size range of 1.8 mm.

The low friction coating 7 of the embodiment 5 has a thickness of 0.09 mm; the optical fiber 2 has a diameter of 245 μm ± 15 μm; the loose tube 3 is a nylon loose tube; the reinforcing rope 4 is a copper plated steel wire; The diameter is in the range of 2.5 mm.

A method of manufacturing a low-friction fiber optic cable of the above embodiment, the manufacturing method being based on a coating device 8, the coating device 8 comprising an infiltration mechanism 9, an air compressor 10, a paint storage tank for storing low-friction paint 11 and heat a curing mechanism 12, one end of the paint storage tank 11 is connected to the air compressor 10, and the other end is connected to the immersion mechanism 9 through a pipe. The heat curing mechanism 12 is located at the outlet side of the immersion mechanism 9, and is located at the air compressor 10 and An air pressure regulating valve 13 is mounted on the pipe between the paint storage tanks 11; the wetting mechanism 9 further includes a casing 91, a wetting tank 92, an inlet die 93 and an outlet wiper die 94, the wetting tank 92 being located in the casing 91, the inlet die 93 and the outlet wiper die 94 are respectively mounted on the front end face and the rear end face of the housing 91, and the paint storage tank 11 is connected to the casing 91 of the wetting mechanism 9 by a pipe;

The manufacturing method includes the following steps:

Step 1. Driven by the compressed air generated by the air compressor 10, the low friction paint located in the paint storage tank 11 passes through the pipeline into the wetting tank 92 of the wetting mechanism 9, which in turn passes through the inlet mold 93 of the wetting mechanism 9, The wetting tank 92 and the outlet wiping die 94 are coated on the fiber optic cable 1 with a low friction coating layer having a pressure of 0.1 MPa to 1 MPa; the low friction coating is composed of the following components by weight: polytetrafluoroethylene 40 to 60 parts of ethylene emulsion, 20 to 30 parts of octadecyl methacrylate, 18 to 25 parts of perfluorooctyl methacrylate, 15 to 20 parts of polyether, 10 to 15 parts of trimethylolpropane, isocyanate 8 to 10 parts, 5 to 8 parts of silica, and 3 to 5 parts of titanium dioxide;

Step 2: The fiber optic cable 1 coated with the low friction coating layer passes through the heat curing mechanism 12 to form a low friction coating 7 on the outer surface of the fiber optic cable 1. The length of the heat curing mechanism 12 is between about 1 m and 5 m, and the temperature is 120 ° C. ~250 °C.

Before the first step, the optical fiber cable 1 is also subjected to a cleaning process. The cleaning process is aligned by the four cone-shaped air blowing guns 14 at a 90° interval on the surface of the fiber optic cable 1, and the diameter of the air blowing nozzle is between 1 mm and 5 mm. The distance between the optical fiber cable 1 and the optical fiber cable 1 is between 5 mm and 40 mm.

The above-mentioned conical air blowing gun 14 forms a dry air air pressure of 0.1 MPa to 1 MPa, a temperature of 60 ° C ± 5 ° C, and a humidity of not more than 30%.

The detection process of the low friction optical fiber cable of the invention is as follows:

1. a. The test device comprises two parallel fixed panels, which require a metal panel or wooden board of sufficient strength, and has a length of about 200 mm;

b. Test friction contact sample, usually the same type of cable product as the test sample, length 200mm ± 20mm. The optical cable can be fixed on the panel by strong adhesive, or after drilling with a drill in the middle of the optical cable, the wire is inserted into the panel by 0.5~1.5mm and fixed on the panel, and the fixing strength is large enough to avoid the test friction during the test. Contact with the sample slips to affect the test.

c. The test sample is a test cable sample with a length of 200 mm ± 20 mm. In order to make the test sample fully contact with the friction contact sample during the test, for a round cable, an elliptical cable or a cable that is easily deformed At least 4 friction contact samples can be attached to each of the fixed panels, and the test cable is placed adjacent to the intermediate position of the two friction contact samples. For flat cable samples, at least 3 friction contact samples are attached to each fixed panel, and the test cable is overlapped with the middle friction contact sample as much as possible.

d. When the tested optical cable is tested for friction coefficient, one end is fixed to the tensile machine in a suitable manner. When the cable coating layer is subjected to the abrasion resistance test, the test sample should be between 300 mm and 500 mm, and one end (A end) is fixed after the tensile machine is stretched, and when the other end (B end) remains about 50 mm, Then, the B end is fixed by a tensile machine for stretching, and when the remaining end of the A end is about 50 mm, one cycle is formed, so that it reciprocates.

e. The pressure F and F values applied between the two parallel panels are between 10N and 50N. According to the actual situation, suitable data can be selected for testing.

f. During the test, tensile machine at a speed of 100mm / min tensile test sample, obtained from an initial _tensile force F, the static friction coefficient μ = F _pull / 2F.

2. After the optical cable is coated with low friction fluoropolymer coating, the test method of the test device of Fig. 1 is adopted, the static friction coefficient is less than 0.25, and the firmness is reliable. When the abrasion test is performed under the test device of Fig. 1, the tested optical cable After reciprocatingly stretching 100 times under a pressure of 25 N, the static friction coefficient was retested, and the static friction coefficient was required to vary by no more than 20%.

3. The optical cable product defined by the present invention is in accordance with the test method of E17B in GB/T 7424.2-2008. The length of the L segment is between 0.3 and 2.0 m, the force application range is between 0.2 N and 2 N, and the rigidity of the optical cable is in the range of 0.2. Between Nm ² and 2Nm ² .

4. Push performance test of optical cable:

a. The optical cable is used to hold the optical cable in a suitable manner, which may be a human hand, a robot or a crawler type pressing device;

b. The total length of the pipeline route is 115m±5m, the bending radius is about R=300mm±30mm, the length L=32m±1m, the width W=25m±1m, and the push test pipeline route is as shown in Fig. 2, where the A end is the optical cable push At the beginning end, the B end protrudes from the B end after the optical cable is pushed.

c. Slowly push the optical cable to the pipe of the specified size at a speed of 1m/min to 20m/min. The maximum push test time is less than 30min.

d. Judgment: If the optical cable can be pushed to the B end position by the A end position from the A end position within the specified time within the specified time, the cable is judged to be qualified.

When the above low-friction fiber optic cable and the manufacturing method thereof are used, a novel low-friction fiber optic cable is developed, which is formed by using a specific component to form a low-friction coating, and then thermally cured to form a low-friction coating on the outer surface of the sheath layer. It has low friction characteristics, suitable rigidity and light weight. For the current communication man well distance is less than 110m, the cell access is within 50m, which can meet the push of the optical cable within 110m within the pipeline, without traction rope traction, not only construction At the same time, the number of personnel is greatly reduced, and the laid optical cable and the already-applied optical cable are more safe and reliable; at the same time, the optical cable laying can be carried out by manual or mechanical pushing, and the conventional artificial traction laying or air blowing laying is still applicable, and because the invention has The low friction characteristics make the artificial migration laying faster, more convenient and safer than the traditional optical cable; the test results are as follows: (1) The flat cable is tested by the static friction test device, and the static friction coefficient is 0.21; (2) the flat cable is The static friction test device is subjected to wear resistance test, and the coefficient of friction after 100 times is 0.24; (3) according to GB/T 742 In the test mode of E17B in 4.2-2008, the length of the L segment is between 0.5m, the force range is 0.49N, and the rigidity of the cable is 0.52Nm2. (4) Cable Pushing Performance: Tested in the “20 mm inner diameter pipe” according to the “pushing performance test of the optical cable” defined in the present invention, capable of pushing one end of the optical cable from the A end position to the B end position within 30 minutes; 5) The static friction coefficient is less than 0.25, and the firmness is reliable. When the abrasion test is carried out under the test device of Fig. 1, the tested optical cable is re-stretched 100 times under the pressure of 25N, and then the static friction coefficient is retested, and the static friction coefficient is required to change. Not more than 20%.

The above embodiments are merely illustrative of the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and to implement the present invention, and the scope of the present invention is not limited thereto. Equivalent variations or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims

A low-friction fiber optic cable (1) comprising a loose tube (3) with a plurality of optical fibers (2) and at least two reinforcing cords (4), the optical fiber (2) A water blocking paste (5) is filled between the loose tube (3), and a sheath layer (6) is coated on the outer surface of the loose tube (3) and the reinforcing rope (4), characterized in that: The outer surface of the jacket (6) is coated with a low friction coating (7) which is thermally cured from a low friction coating consisting of the following components by weight:

The silica and the titanium dioxide each have a diameter of 50 nm to 200 nm.
A low-friction fiber optic cable according to claim 1, wherein said low friction coating (7) has a thickness of from 0.06 mm to 0.15 mm.
The low-friction fiber optic cable according to claim 1 or 2, wherein the optical fiber (2) has a diameter of 245 μm ± 15 μm fiber or an optical fiber having a diameter of 200 μm ± 15 μm.
The low-friction fiber optic cable according to claim 1 or 2, wherein the loose tube (3) is a polypropylene loose tube, a polybutylene terephthalate loose tube, and a nylon loose tube. Or polycarbonate loose tube.
The low-friction fiber optic cable according to claim 1 or 2, characterized in that the reinforcing cord (4) is a fiberglass rod, a 304 stainless steel wire, a copper-plated steel wire or a phosphating steel wire.
A low-friction fiber optic cable according to claim 1 or 2, wherein the reinforcing cord (4) has a diameter ranging from 0.6 mm to 3.0 mm.
A method of manufacturing a low-friction fiber optic cable according to claim 1, characterized in that the manufacturing method is based on a coating device (8) comprising an infiltration mechanism (9), air a compressor (10), a paint storage tank (11) for storing low friction paint, and a heat curing mechanism (12), the paint storage tank (11) is connected at one end to the air compressor (10), and the other end is connected to the air through a pipe The wetting mechanism (9), the heat curing mechanism (12) is located at the outlet side of the wetting mechanism (9), and an air pressure is installed on the pipe between the air compressor (10) and the paint storage tank (11) a regulating valve (13); the wetting mechanism (9) further comprising a housing (91), a wetting tank (92), an inlet mold (93) and an outlet wiper mold (94), the wetting tank (92) being located in the shell In the body (91), the inlet mold (93) And an outlet wiping die (94) are respectively mounted on the front end surface and the rear end surface of the casing (91), and the paint storage tank (11) is connected to the casing (91) of the wetting mechanism (9) through a pipe;

The manufacturing method includes the following steps:

Step 1. Driven by the compressed air generated by the air compressor (10), the low friction paint located in the paint storage tank (11) passes through the pipeline into the wetting tank (92) of the wetting mechanism (9), the fiber optic cable (1) Passing through the inlet mold (93), the wetting tank (92) and the outlet wiping mold (94) of the wetting mechanism (9), so that the fiber optic cable (1) is covered with a low friction coating layer, the pressure of the compressed air is 0.1 Mpa ~ 1Mpa; this low friction coating consists of the following parts by weight: 40 to 60 parts of polytetrafluoroethylene emulsion, 20 to 30 parts of octadecyl methacrylate, and perfluorooctyl ethyl methacrylate 18 to 25 Parts, 15-20 parts of polyether, 10-15 parts of trimethylolpropane, 8-10 parts of isocyanate, 5-8 parts of silica, 3-5 parts of titanium dioxide;

Step 2: The fiber optic cable (1) coated with the low friction coating layer passes through the heat curing mechanism (12) to form a low friction coating (7) on the outer surface of the fiber optic cable (1), and the length of the heat curing mechanism (12) It is between about 1 m and 5 m, and the temperature is between 120 ° C and 250 ° C.
The method of manufacturing a low-friction fiber optic cable according to claim 7, wherein before the step 1, the fiber optic cable (1) is further subjected to a cleaning process, and the cleaning process is performed by four conical air blowing guns (14). The surface of the fiber optic cable (1) is aligned at an interval of 90°, and the diameter of the air blowing nozzle is between 1 mm and 5 mm, and the distance between the fiber optic cable (1) is between 5 mm and 40 mm.
The method of manufacturing a low-friction fiber optic cable according to claim 8, wherein the air pressure of the dry air formed by the conical air blowing gun (14) is 0.1 MPa to 1 MPa, the temperature is 60 ° C ± 5 ° C, and the humidity is not greater than 30%.