CN109336378A - A kind of continuous production processes of high strength optical fiber - Google Patents
A kind of continuous production processes of high strength optical fiber Download PDFInfo
- Publication number
- CN109336378A CN109336378A CN201811600514.5A CN201811600514A CN109336378A CN 109336378 A CN109336378 A CN 109336378A CN 201811600514 A CN201811600514 A CN 201811600514A CN 109336378 A CN109336378 A CN 109336378A
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- optical fiber
- cooling
- high strength
- continuous production
- production processes
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/0253—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/285—Acrylic resins
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
The invention discloses a kind of continuous production processes of high strength optical fiber, comprising the following steps: (1) cleans preform using Solvent Gradient；(2) preform prepared by step (1) is transferred to heating furnace, heating and melting forms optical fiber after drawing；(3) optical fiber prepared by step (2) is transferred to cooling system, the cooling system forces the cooling type of cooling combined to cool down optical fiber using natural cooling and helium；(4) step (3) optical fiber surface after cooling is used to mold applied in two coats resin in application system, and resin ultra-violet curing is formed；(5) optical fiber after curing molding is transmitted to winding system through traction wheel, completes take-up.The present invention achievees the purpose that one-pass molding, production process be less, continuous high speed output by improvement existing equipment.
Description
Technical field
The present invention relates to a kind of continuous production processes of high strength optical fiber, belong to optical fiber production technical field.
Background technique
Optical fiber be by the heated stove heating of preform, cooling tube it is cooling, it is coated, ultraviolet light curing again after, finally
Optical fiber is made.Uncoated optical fiber is come out by heating furnace and is known as bare fibre, bare fibre only has two parts of fibre core and covering.It is naked
The optical fiber obtained after the coated solidification of optical fiber is referred to as true qualities optical fiber.
There are two types of heating furnaces, and one is induction type heating furnace, one is resistance-type heating furnaces, heating furnace needle hereinafter
To resistance-type heating furnace.Optical fiber is cooling mainly natural cooling and two kinds of helium gas cooling, and natural cooling is exactly by bare fibre exposure
In air, air takes away heat with optical fiber generation heat exchange.Helium gas cooling is mainly the heat transfer property for utilizing helium excellent
The heat of optical fiber is taken away, with optical fiber heat exchange occurs for helium first here, and then heat is transferred to cooling pipe clamp again by helium
The cooling water of layer, cooling water are taken away heat by the circulatory system.Bare fibre must be cooled to after suitable temperature could be into
The coating and solidification of row resin.
After the coated system applied in two coats resin of bare fibre true qualities optical fiber, coating processes mainly have dry humidification and wet at present
Two methods are humidified, humidification is done and is coated using substep, the method for step curing realizes the coating of optical fiber two layers of resin, and wet humidification is adopted
The coating of optical fiber two layers of resin is realized with the method for primary coating one-step solidification.Compared to dry humidification application system, wet humidification is applied
More saving space is covered, it is more efficient, more it is able to satisfy the technique requirement of high-speed wire-drawing.
Fiber strength is one of optical fiber Specifeca tion speeification, system where the superiority and inferiority of fiber strength will directly affect optical fiber
Reliability.Especially when optical fiber is used for extreme environment, since the working environment of optical fiber is severe, meet with stresses larger, storage week
Phase is longer, and the requirement to fiber strength is very harsh.The strength criterion of optical fiber is 100Kpsi at present, therefore 200Kpsi optical fiber is special
Refer to the higher optical fiber of fiber strength grade, to meet the requirement of more complicated adverse circumstances.
At the control of the temperature such as the composition of fiber strength and optical fiber, structure, surface and internal state, heating furnace and cooling, heat
The factors such as manage bar part, curing process are related.Silica fibre is easy due to internal flaw, surface losses or because of various reactions
Inside of optical fibre or surface form various micro-cracks, and the extension of these micro-cracks and the brittleness of quartz glass are silica fibre intensity
The main reason for reduction.Studies have shown that the crackle for reducing fiber strength is mainly to generate in fiber preparation, work as crackle
It will lead to fiber strength significant decrease when extending to a certain extent, eventually lead to fibercuts.Under normal conditions, silica fibre table
Face is elastic material, and in elastic limit, the generation and disappearance of fibre strain are to complete moment, but when duration of load application is longer,
It will appear optical-fiber deformation hysteresis, be also easy to cause the extension of crackle, fiber strength is caused to reduce.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of the continuous of high strength optical fiber is provided
Production technology achievees the purpose that one-pass molding, production process be less, continuous high speed output.
In order to solve the above technical problems, the present invention provides a kind of continuous production processes of high strength optical fiber, characterized in that packet
Include following steps:
(1) preform is cleaned using Solvent Gradient；
(2) preform prepared by step (1) is transferred to heating furnace, heating and melting forms optical fiber after drawing；
(3) optical fiber prepared by step (2) is transferred to cooling system, the cooling system is forced cold using natural cooling and helium
But the type of cooling that combines cools down optical fiber；
(4) step (3) optical fiber surface after cooling is coated into inside and outside two layers of resin using mold in application system, and will tree
The molding of rouge ultra-violet curing；
(5) optical fiber after curing molding is transmitted to winding system through traction wheel, completes take-up.
By using above-mentioned technical proposal, it can be achieved that one-pass molding, production process be less, continuous output.
Preferably, to use massive laundering first, then alcohol/5 ~ 10min of acetone soak is taken out, then uses for the gradient cleaning
Deionized water is rinsed, and after cold wind drying, then carries out pickling operation.It is cleaned by gradient, prefabricated rods table can be reduced to the greatest extent
The impurity or micro-crack in face, improve the intensity of naked fibre.
Preferably, it is uniformly mixed into port equipped with multiple in the heating furnace, improves heating gas stream in the stove and is unevenly distributed,
The microparticle generated in heating furnace is avoided to be attached to preform.
Preferably, the heating furnace includes heating graphite material, blunt again after the heating graphite material progress high-temperature baking
Change, the generation of possible particulate matter can be effectively reduced.
Preferably, the heating furnace recirculated water 0.1 ~ 0.5MPa of intake pressure, 0.10 ~ 0.30MPa of discharge pressure, argon in furnace
2 ~ 8L/min of throughput, oxygen content < 200ppm in furnace.
Preferably, the helium pressure is cooled to top helium pressure cooling system and lower part helium pressure cooling system point
Grade control.By using above-mentioned technical proposal, it not only can be reduced helium waste, reach optimal cooling effect, and can be reduced
The disturbance of optical fiber.
Preferably, the natural cooling time is 60 ~ 120 milliseconds, when the natural cooling time and helium force cooling
Between ratio be 0.4 ~ 1.0.
Preferably, the curing degree of the ultra-violet curing is 88% ~ 98%.
In conclusion the invention has the following advantages: the continuous production processes of high strength optical fiber of the invention are through drawing
Wire process one-pass molding, production process is less, without additional structure or protection location, guarantees that the high strength optical fiber continuously produces
Out, and optical fiber structure is standard fiber structure, does not influence the subsequent reprocessing of optical fiber, guarantees that the optical fiber has better applicability；
Compared to the coating processes of dry humidification, realize that the wet of the coating of optical fiber two layers of resin adds using the method for primary coating one-step solidification
Wet coating processes are more efficient, and faster, maximum speed is at least doubled speed of production up to 3500m/min, speed；This
Invention is cleaned using gradient, can be reduced the impurity or micro-crack on prefabricated rods surface to the greatest extent, be improved the intensity of naked fibre；This
Invention forces cooling grading control using helium, not only can be reduced helium waste, reaches optimal cooling effect, and can be reduced
The disturbance of optical fiber；The present invention controls optical fiber coating diameter always in a Reasonable area by the temperature and pressure of control coated with resins
Interior steady fluctuation, guarantees the quality of optical fiber coating.
Detailed description of the invention
Fig. 1 is the schematic device of the continuous production processes of high strength optical fiber of the invention.
Appended drawing reference is as follows: 1, preform；2, heating furnace；3, cooling system；4, application system；5, traction wheel；6,
Winding system.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of continuous production processes of high strength optical fiber of the invention the following steps are included:
(1) preform 1 is cleaned using Solvent Gradient；
(2) preform 1 prepared by step (1) is transferred to heating furnace 2, heating and melting forms optical fiber after drawing；
(3) optical fiber prepared by step (2) is transferred to cooling system 3, the cooling system 3 is forced using natural cooling and helium
The cooling type of cooling combined cools down optical fiber；
(4) step (3) optical fiber surface after cooling is coated into inside and outside two layers of resin using mold in application system, and will tree
The molding of rouge ultra-violet curing；
(5) optical fiber after curing molding is transmitted to winding system 6 through traction wheel 5, completes take-up.
By using above-mentioned technical proposal, it can be achieved that one-pass molding, production process be less, continuous high speed output.
Embodiment 1
As shown in Figure 1, a kind of continuous production processes of high strength optical fiber of the invention the following steps are included:
(1) preform 1 is cleaned using Solvent Gradient, uses massive laundering first, then alcohol/acetone soak 10min takes out,
It is rinsed again with deionized water, after cold wind drying, then carries out pickling operation.
(2) preform 1 prepared by step (1) is transferred to heating furnace 2, is equipped with multiple uniform mixing in heating furnace 2
Air inlet improves 2 interior air-flow of heating furnace and is unevenly distributed, the microparticle generated in heating furnace 2 is avoided to be attached to preform
1, heating furnace 2 includes heating graphite material, and the heating graphite material is passivated again after carrying out high-temperature baking at 100 DEG C, can have
Effect reduce may particulate matter generation, heating furnace 2 recirculated water intake pressure 0.5MPa, discharge pressure 0.30MPa, argon gas stream in furnace
Measure 8L/min, oxygen content 180ppm in furnace.Heated 2 heating and melting of furnace, forms optical fiber after drawing.
(3) optical fiber prepared by step (2) is transferred to cooling system 3, the cooling system 3 uses natural cooling and helium
The cooling type of cooling combined is forced to cool down optical fiber.Helium pressure is cooled to top helium pressure cooling system 3 and lower part
3 grading control of helium pressure cooling system；The top helium pressure cooling system 3 includes three cooling tubes, each cooling tube
Helium gas flow is 4L/min；The lower part helium pressure cooling system 3 includes five cooling tubes, and each cooling tube helium gas flow is
6L/min.The natural cooling time is 120 milliseconds, and the ratio that the natural cooling time forces cooling time with helium is
0.4。
(4) step (3) optical fiber surface after cooling is coated into inside and outside two layers of resin using mold in application system, applied
Fibre diameter after having covered inner layer resin is 192 μm, and the fibre diameter after having coated inside and outside two layers of resin is 240 μm, coating tree
The temperature of rouge is 55 DEG C, and the pressure 0.35MPa of coated with resins, coated with resins is acrylic resin, and coated with resins is ultraviolet solid
Chemical conversion type, one layer of resin of curing degree of the ultra-violet curing are 94%, and the curing degree of two-layer tree rouge is 98%.
(5) optical fiber after curing molding is transmitted to winding system 6 through traction wheel 5, completes take-up.
The intensity screened through tension screening machine tension, discovery optical fiber at 200Kpsi is still unbroken, meets high-intensitive want
It asks.
Embodiment 2
As shown in Figure 1, a kind of continuous production processes of high strength optical fiber of the invention the following steps are included:
(1) preform 1 is cleaned using Solvent Gradient, uses massive laundering first, then alcohol/acetone soak 5min takes out,
It is rinsed again with deionized water, after cold wind drying, then carries out pickling operation.
(2) preform 1 prepared by step (1) is transferred to heating furnace 2, is equipped with multiple uniform mixing in heating furnace 2
Air inlet improves 2 interior air-flow of heating furnace and is unevenly distributed, the microparticle generated in heating furnace 2 is avoided to be attached to preform
1, heating furnace 2 includes heating graphite material, and the heating graphite material is passivated again after carrying out high-temperature baking at 200 DEG C, can have
Effect reduce may particulate matter generation, heating furnace 2 recirculated water intake pressure 0.1MPa, discharge pressure 0.10MPa, argon gas stream in furnace
Measure 2L/min, oxygen content 60ppm in furnace.Heated 2 heating and melting of furnace, forms optical fiber after drawing.
(3) optical fiber prepared by step (2) is transferred to cooling system 3, the cooling system 3 uses natural cooling and helium
The cooling type of cooling combined is forced to cool down optical fiber.Helium pressure is cooled to top helium pressure cooling system 3 and lower part
3 grading control of helium pressure cooling system；The top helium pressure cooling system 3 includes three cooling tubes, each cooling tube
Helium gas flow is 1L/min；The lower part helium pressure cooling system 3 includes five cooling tubes, and each cooling tube helium gas flow is
1L/min.The natural cooling time is 60 milliseconds, and the natural cooling time is 1 with the ratio that helium forces cooling time.
(4) step (3) optical fiber surface after cooling is coated into inside and outside two layers of resin using mold in application system, applied
Fibre diameter after having covered inner layer resin is 196 μm, and the fibre diameter after having coated inside and outside two layers of resin is 248 μm, coating tree
The temperature of rouge is 50 DEG C, and the pressure 0.30MPa of coated with resins, coated with resins is acrylic resin, and coated with resins is ultraviolet solid
Chemical conversion type, one layer of resin of curing degree of the ultra-violet curing are 88%, and the curing degree of two-layer tree rouge is 94%.
(5) optical fiber after curing molding is transmitted to winding system 6 through traction wheel 5, completes take-up.
The intensity screened through tension screening machine tension, discovery optical fiber at 200Kpsi is still unbroken, meets high-intensitive want
It asks.
As shown in the following table 1, table 2, influence by realization optical fiber coating to fiber strength, discovery fiber strength is not
Only be positively correlated with coat thickness, also with coat the fibre diameter after inside and outside two layers of resin and has coated inner layer resin after
The thickness of fibre diameter is than related, and the outermost resin thickness generally coated is bigger, and fiber strength is also better, and PT value is to reel off raw silk from cocoons in table
Length is a statistical value for representing fiber strength, numerical value is bigger, and it is better to represent fiber strength divided by disconnected fine number.We are logical
Cross many experiments discovery, fibre diameter after coat inside and outside two layers of resin with coated the fibre diameter after inner layer resin
Thickness than control at 1.25 or so, when two-layer tree rouge thickness is relatively large, the intensity of optical fiber is generally more preferable.
Table 1:
| Coating ratio | 1.205 | 1.21 | 1.22 | 1.228 | 1.235 | 1.255 | 1.275 |
| PT value | 273 | 269 | 364 | 478 | 496 | 1403 | 933 |
Table 2:
| Coating ratio | 1.241 | 1.245 | 1.248 | 1.25 | 1.252 | 1.253 |
| PT value | 1050 | 1041 | 1347 | 1942 | 853 | 782 |
For the continuous production processes of high strength optical fiber of the invention through wire-drawing process one-pass molding, production process is less, does not add
Structure or protection location, guarantee the continuous output of the high strength optical fiber, and optical fiber structure is standard fiber structure, does not influence light
Fine subsequent reprocessing guarantees that the optical fiber has better applicability；Compared to the coating processes of dry humidification, using primary coating one
Secondary cured method realizes that the coating processes of the wet humidification of the coating of optical fiber two layers of resin are more efficient, speed of production faster, most
At high speed up to 3500m/min, speed is at least doubled；The present invention is cleaned using gradient, can be reduced to the greatest extent pre-
The impurity or micro-crack on stick surface processed, improve the intensity of naked fibre；The present invention forces cooling grading control using helium, can not only
Helium waste is reduced, reaches optimal cooling effect, and can be reduced the disturbance of optical fiber；The present invention passes through control coated with resins
Temperature and pressure control optical fiber coating diameter steadily fluctuates in a reasonable interval always, guarantees the quality of optical fiber coating.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of continuous production processes of high strength optical fiber, characterized in that the following steps are included:
(1) preform is cleaned using Solvent Gradient；
(2) preform prepared by step (1) is transferred to heating furnace, heating and melting forms optical fiber after drawing；
(3) optical fiber prepared by step (2) is transferred to cooling system, the cooling system is forced cold using natural cooling and helium
But the type of cooling that combines cools down optical fiber；
(4) step (3) optical fiber surface after cooling is coated into inside and outside two layers of resin using mold in application system, and will tree
The molding of rouge ultra-violet curing；
(5) optical fiber after curing molding is transmitted to winding system through traction wheel, completes take-up.
2. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that the gradient, which is cleaned, is
Massive laundering is used first, then alcohol/5 ~ 10min of acetone soak takes out, then is rinsed with deionized water, after cold wind drying, then into
Row pickling operation.
3. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that set in the heating furnace
Have and multiple is uniformly mixed into port.
4. a kind of continuous production processes of high strength optical fiber according to claim 1 or 3, characterized in that the heating furnace
Including heating graphite material, the heating graphite material is passivated again after carrying out high-temperature baking.
5. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that the heating furnace circulation
Water 0.1 ~ 0.5MPa of intake pressure, 0.10 ~ 0.30MPa of discharge pressure, 2 ~ 8L/min of argon flow in furnace, oxygen content in furnace <
200ppm。
6. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that the helium is forced cold
It but is top helium pressure cooling system and lower part helium pressure cooling system grading control.
7. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that when the natural cooling
Between be 60 ~ 120 milliseconds, the ratio that the natural cooling time and helium force cooling time is 0.4 ~ 1.0.
8. a kind of continuous production processes of high strength optical fiber according to claim 1, characterized in that the ultra-violet curing
Curing degree is 88% ~ 98%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811600514.5A CN109336378A (en) | 2018-12-26 | 2018-12-26 | A kind of continuous production processes of high strength optical fiber |
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| CN201811600514.5A CN109336378A (en) | 2018-12-26 | 2018-12-26 | A kind of continuous production processes of high strength optical fiber |
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ID=65297234
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304822A (en) * | 2019-07-16 | 2019-10-08 | 成都中住光纤有限公司 | A kind of manufacturing method and its manufacturing equipment of easy-peel coated optical fiber |
| CN111138092A (en) * | 2019-12-20 | 2020-05-12 | 杭州富通通信技术股份有限公司 | Optical fiber production process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533122A (en) * | 2009-04-27 | 2009-09-16 | 中天科技光纤有限公司 | Method for preparing single-film optical fiber for high-strength large-coil long submarine optical cable |
-
2018
- 2018-12-26 CN CN201811600514.5A patent/CN109336378A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533122A (en) * | 2009-04-27 | 2009-09-16 | 中天科技光纤有限公司 | Method for preparing single-film optical fiber for high-strength large-coil long submarine optical cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304822A (en) * | 2019-07-16 | 2019-10-08 | 成都中住光纤有限公司 | A kind of manufacturing method and its manufacturing equipment of easy-peel coated optical fiber |
| CN111138092A (en) * | 2019-12-20 | 2020-05-12 | 杭州富通通信技术股份有限公司 | Optical fiber production process |
| CN111138092B (en) * | 2019-12-20 | 2022-03-04 | 杭州富通通信技术股份有限公司 | Optical fiber production process |
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Application publication date: 20190215 |