CN108761680A - A kind of fixed steady phase optical cable of bilayer and preparation method thereof - Google Patents
A kind of fixed steady phase optical cable of bilayer and preparation method thereof Download PDFInfo
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- CN108761680A CN108761680A CN201810498154.6A CN201810498154A CN108761680A CN 108761680 A CN108761680 A CN 108761680A CN 201810498154 A CN201810498154 A CN 201810498154A CN 108761680 A CN108761680 A CN 108761680A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 101
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 114
- 239000000463 material Substances 0.000 claims abstract description 94
- 239000013307 optical fiber Substances 0.000 claims abstract description 80
- 238000002679 ablation Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 61
- 238000001816 cooling Methods 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- -1 polyparaphenylene Terephthalamide Polymers 0.000 claims description 11
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 8
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 7
- XRASRVJYOMVDNP-UHFFFAOYSA-N 4-(7-azabicyclo[4.1.0]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=CC=C21 XRASRVJYOMVDNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 152
- 239000000835 fiber Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 229920000265 Polyparaphenylene Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- NAYYNDKKHOIIOD-UHFFFAOYSA-N phthalamide Chemical compound NC(=O)C1=CC=CC=C1C(N)=O NAYYNDKKHOIIOD-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
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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
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0075—Light guides, optical cables
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses fixed steady phase optical cables of a kind of bilayer and preparation method thereof.The steady phase optical cable includes successively from the inside to the outside：Optical fiber, the first tight sleeve layer and the second tight sleeve layer；First tight sleeve layer and optical fiber ablation power are in 2N between 9N, and for the LCP materials of molecular orientation arrangement, thickness is in 0.05mm between 0.3mm, and elasticity modulus is 10GPa to 13GPa, and coefficient of thermal expansion is -1~1 × 10‑7/K.The method includes：(1) first time extrusion moulding：By optical fiber and the first fixed layer material by extruding machine extrusion moulding, the steady phase optical cable of an extrusion molding is obtained；(2) second of extrusion moulding obtain the fixed steady phase optical cable of bilayer by the steady phase optical cable of an extrusion molding and the second fixed layer material by extruding machine extrusion moulding.Temperature stability increases considerably in wider range, to improve transmission accuracy of the phase offset to signal, can apply to the fields such as radar.
Description
Technical field
The invention belongs to special optical cable technical fields, more particularly, to a kind of fixed steady phase optical cable of bilayer and its preparation
Method.
Background technology
Conventional fiber cable manufactures, optical path difference can change with temperature change.This change procedure mainly due to
Optical fiber expand with heat and contract with cold and the optical index of glass fuse variation cause.The temperature drift coefficient of generally conventional optical fiber is
(40Ps/km/K), optical path difference variation lead to that phase offset occurs in optical transmission process.
In the higher field of some precision prescribeies, such as radar application field, precise delivery of the phase offset to signal
There is larger impact, therefore there are many urgent demands for steady phase optical cable at present.There are optical path differences with temperature for conventional tight tube fiber
Larger problem is fluctuated in variation, and the temperature drift coefficient representative value of conventional fixed product is in 40~60Ps/km/K ranges, or even place
In the range of bigger, and additional attenuation is larger when use in high and low temperature environment, the reduction of mechanical fiber optic performance.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of fixed steady phase optical cable of bilayer and its
Preparation method, its object is to do and optimize by the double-deck tight tube structure and for the material and performance of each layer of tight sleeve layer, thus
Solve that existing steady phase optical cable temperature drift coefficient is higher, additional attenuation is larger or the technical issues of.
To achieve the above object, according to one aspect of the present invention, provide a kind of fixed steady phase optical cable of bilayer, by it is interior extremely
Include successively outside：Optical fiber, the first tight sleeve layer and the second tight sleeve layer；First tight sleeve layer and optical fiber ablation power 2N to 9N it
Between, for the LCP materials of molecular orientation arrangement, for thickness in 0.05mm between 0.3mm, elasticity modulus is 10GPa to 13GPa,
Coefficient of thermal expansion is -1~1 × 10-7/K。
Preferably, the fixed steady phase optical cable of the bilayer, first tight sleeve layer are polyparaphenylene terephthalamide,
Melt-flow index is between 15~35, preferably between 17~26.
Preferably, the fixed steady phase optical cable of the bilayer, the second tight sleeve layer are ethylene tetrafluoroethylene copolymer, melt-flow index
Between 10 to 25, thickness in 0.05mm between 0.15mm, with the peeling force of the first tight sleeve layer in 0.8N between 6N.
Preferably, the fixed steady phase optical cable of the bilayer, the second tight sleeve layer deformation ratio>400%.
Other side according to the invention provides a kind of preparation method of the fixed steady phase optical cable of bilayer, packet
Include following steps：
(1) first time extrusion moulding：By optical fiber and the first fixed layer material by extruding machine extrusion moulding, primary squeeze is obtained
Mould steady phase optical cable；
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained.
Preferably, the preparation method of the fixed steady phase optical cable of the bilayer, step (1) include：
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2).
Preferably, the preparation method of the fixed steady phase optical cable of the bilayer, step (1-1) the optical fiber preheating temperature 230
DEG C~280 DEG C, preheating time 1s to 3s.
Preferably, the preparation method of the fixed steady phase optical cable of the bilayer, the first fixed layer material are phenylene pair
Benzenedicarboxamide, melt-flow index is between 15~35, preferably between 17~26；
The described first fixed 100 DEG C to 150 DEG C of layer material preliminary drying temperature of step (1-1), preliminary drying time 6h to 15h；
It is 320~400 DEG C that step (1-2), which extrudes die temperature, and speed of production is 150~250m/min；
Step (1-3) air cooling is to 20 DEG C to 50 DEG C.
Preferably, the preparation method of the fixed steady phase optical cable of the bilayer, the step (2) include：
Described second fixed layer material is carried out preliminary drying processing by (2-1)；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2).
Preferably, the preparation method of the fixed steady phase optical cable of the bilayer, the second fixed layer material are ethyl tetra
Ethylene copolymer, melt-flow index is between 10 to 25；
The described second fixed 40 DEG C to 100 DEG C of layer material preliminary drying temperature of step (2-1), preliminary drying time 3h to 8h；
It is 310~350 DEG C that step (2-2), which extrudes die temperature, and speed of production is 20~60m/min；
Step (2-3) air cooling is to 20 DEG C to 50 DEG C, take-up under 0.6N to 2.0N tension.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
The fixed steady phase optical cable of bilayer provided by the invention, choosing is optimized by the material physicochemical property to the first tight sleeve layer
Select, especially the optimum choice to elasticity modulus and coefficient of thermal expansion, at the same to geometric dimension optimize, first tight sleeve layer with
Optical fiber ablation power optimizes, and can reduce the temperature drift coefficient of optical cable, and temperature drift coefficient is controlled up to 5~10Ps/km/K, compared with
40~60Ps/km/K or so of conventional class tight tube fiber, temperature stability increases considerably in wider range, to improve phase
The transmission accuracy to signal is deviated, the fields such as radar are can apply to.
Preferred embodiment, by the selection of the material physicochemical property of the first tight sleeve layer, the second tight sleeve layer and geometric Parameters Optimization,
It can reduce light decay consumption while reducing the temperature drift coefficient of optical cable, improve mechanical performance, further meet application requirement,
Prolong the service life, the double-deck fixed material structure durability increases, and appearance looks elegant；Product outer diameter is smaller, easy to use.
The preparation method of the fixed steady phase optical cable of bilayer provided by the invention, can improve between the first tight sleeve layer and optical fiber,
The molding geometric identity of combination stability and material between one tight sleeve layer and the second tight sleeve layer, to improve optical fiber
Energy and yield rate.
Description of the drawings
Fig. 1 is the fixed steady phase cable configuration schematic diagram of bilayer provided by the invention；
Fig. 2 is the temperature drift coefficient and the routine G652D optical fiber coefficient pair for the steady phase optical cable that the embodiment of the present invention 1 provides
Than figure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
The fixed steady phase optical cable of bilayer provided by the invention includes successively from the inside to the outside：Optical fiber, the first tight sleeve layer and second are tight
Jacket layer.
First tight sleeve layer and optical fiber ablation power in 2N between 9N, for the LCP materials of molecular orientation arrangement, thickness
In 0.05mm between 0.3mm, elasticity modulus is 10~13GPa, and coefficient of thermal expansion is -1~1 × 10-7/K.Preferably, described
First tight sleeve layer is polyparaphenylene terephthalamide, and melt-flow index is between 15 to 35, preferably between 17 to 26.
Second tight sleeve layer is ethylene tetrafluoroethylene copolymer, and melt-flow index is between 10 to 25, and thickness is in 0.05mm
To between 0.15mm, with the peeling force of the first tight sleeve layer in 0.8N between 6N.The second tight sleeve layer deformation ratio be more than or
Equal to 400%.
The fixed steady phase optical cable of bilayer provided by the invention varies with temperature for existing optical cable optical path difference and fluctuates larger ask
Topic, using the first tight sleeve layer, relative to optical fiber, its coefficient of thermal expansion is very small, and energy stable fiber reduces the temperature drift of product
Coefficient.In order to reach this effect, the peeling force between LCP tight sleeve layers and optical fiber needs the standard for reaching 2N~9N.Therefore exist
It not only to select coefficient of thermal expansion, elasticity modulus to meet the material of corresponding requirements in LCP materials, while be contemplated that LCP materials
Material is tightly combined degree with optical fiber.
Further, it if using one layer of LCP tight sleeve layer, since LCP materials are directly exposed in application environment, is easy old
Change, the problem of using easily snapping off；And since the mechanical performance of LCP materials is not good enough, single layer tight sleeve layer causes bending performance poor.
Using the double-deck tight tube structure, the micro-crack for avoiding LCP increases the present invention, maintains the temperature drift of optical cable entirety to the maximum extent
It moves coefficient, attenuation, mechanical strength and is in optimal.
The preparation method of the fixed steady phase optical cable of bilayer provided by the invention, includes the following steps：
(1) first time extrusion moulding：By optical fiber and the first fixed layer material by extruding machine extrusion moulding, primary squeeze is obtained
Mould steady phase optical cable；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2).
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2).
It is embodiment below：
Optical fiber used in steady phase optical cable provided by the invention can be multimode or other special optical fiber quartz glass light
Fibre, below by taking G.652D optical fiber as an example：
Embodiment 1
A kind of fixed steady phase optical cable of bilayer includes successively from the inside to the outside：G.652D optical fiber, the first tight sleeve layer and second are fixed
Layer.
First tight sleeve layer and optical fiber ablation power are between 2N, and for the LCP materials of molecular orientation arrangement, thickness exists
Between 0.05mm, elasticity modulus 12.5GPa, coefficient of thermal expansion is -1 × 10-7/K.First tight sleeve layer is polyparaphenylene
Terephthalamide, melt-flow index 16.
Second tight sleeve layer be ethylene tetrafluoroethylene copolymer, melt-flow index 10, thickness between 0.05mm, with
The peeling force of first tight sleeve layer is between 6N.The second tight sleeve layer deformation ratio is 500%.
The fixed steady phase optical cable of bilayer is prepared as follows：
(1) first time extrusion moulding：It will G.652D optical fiber and the first fixed layer material be obtained by extruding machine extrusion moulding
The steady phase optical cable of extrusion molding；
230 DEG C~280 DEG C of the optical fiber preheating temperature, preheating time 1s to 3s
The first fixed layer material is phenylene-terephthalamide, melt-flow index 16；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；100 DEG C of preliminary drying temperature, when preliminary drying
Between 6h；
The the first fixed layer material handled through preliminary drying obtained in step (1-1) is molded by (1-2) by extrusion apparatus, with
The optical fiber of preheating carries out extrusion molding by extruding machine together；It is 370 DEG C to extrude die temperature, speed of production 80m/min；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2) is to 20 DEG C to 50 DEG C.
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；The second fixed layer material is ethyl tetra second
Alkene copolymer, melt-flow index 12；100 DEG C of preliminary drying temperature, preliminary drying time 8h；
The the second fixed layer material handled through preliminary drying obtained in step (2-1) is extruded by (2-2) by extrusion apparatus
Type carries out extrusion molding together with the steady phase optical cable of an extrusion molding obtained in step (1) by extruding machine；It is 350 DEG C to go out die temperature,
Speed of production is 20m/min；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2) to 20 DEG C extremely
50 DEG C, take-up under 1.2N tension.
Embodiment 2
A kind of fixed steady phase optical cable of bilayer includes successively from the inside to the outside：G.652D optical fiber, the first tight sleeve layer and second are fixed
Layer.
First tight sleeve layer and optical fiber ablation power are between 3, and for the LCP materials of molecular orientation arrangement, thickness exists
Between 0.1mm, elasticity modulus 13GPa, coefficient of thermal expansion is -0.2 × 10-7/K.First tight sleeve layer is polyparaphenylene
Terephthalamide, melt-flow index 26.
Second tight sleeve layer is ethylene tetrafluoroethylene copolymer, melt-flow index 25, thickness 0.1mm, with first
The peeling force of tight sleeve layer is between 0.8N.The second tight sleeve layer deformation ratio is 400%.
The fixed steady phase optical cable of bilayer is prepared as follows：
(1) first time extrusion moulding：It will G.652D optical fiber and the first fixed layer material be obtained by extruding machine extrusion moulding
The steady phase optical cable of extrusion molding；
230 DEG C~280 DEG C of the optical fiber preheating temperature, preheating time 1s to 3s
The first fixed layer material is phenylene-terephthalamide, melt-flow index 26；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；150 DEG C of preliminary drying temperature, when preliminary drying
Between 10h；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；It is 350~380 DEG C to extrude die temperature, speed of production 150m/min；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2) is to 20 DEG C to 50 DEG C.
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；The second fixed layer material is ethyl tetra second
Alkene copolymer, melt-flow index 18；80 DEG C of preliminary drying temperature, preliminary drying time 7h；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；It is 350 DEG C to go out die temperature, speed of production
For 30m/min；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2) to 20 DEG C extremely
50 DEG C, take-up under 1.0N tension.
Embodiment 3
A kind of fixed steady phase optical cable of bilayer includes successively from the inside to the outside：G.652D optical fiber, the first tight sleeve layer and second are fixed
Layer.
First tight sleeve layer is 9N with optical fiber ablation power, and for the LCP materials of molecular orientation arrangement, thickness is in 0.3mm
Between, elasticity modulus 10GPa, coefficient of thermal expansion is 1 × 10-7/K.First tight sleeve layer is polyparaphenylene terephthaldehyde
Amide, melt-flow index 15.
Second tight sleeve layer be ethylene tetrafluoroethylene copolymer, melt-flow index 25, thickness between 0.05mm, with
The peeling force of first tight sleeve layer is between 6N.The second tight sleeve layer deformation ratio is 450%.
The fixed steady phase optical cable of bilayer is prepared as follows：
(1) first time extrusion moulding：It will G.652D optical fiber and the first fixed layer material be obtained by extruding machine extrusion moulding
The steady phase optical cable of extrusion molding；
230 DEG C~280 DEG C of the optical fiber preheating temperature, preheating time 1s to 3s
The first fixed layer material is phenylene-terephthalamide, melt-flow index 15；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；140 DEG C of preliminary drying temperature, when preliminary drying
Between 15h；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；It is 400 DEG C to extrude die temperature, speed of production 150m/min；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2) is to 20 DEG C to 50 DEG C.
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；The second fixed layer material is ethyl tetra second
Alkene copolymer, melt-flow index 25；40 DEG C of preliminary drying temperature, preliminary drying time 5h；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；It is 330 DEG C to go out die temperature, speed of production
For 60m/min；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2) to 20 DEG C extremely
50 DEG C, take-up under 2.0N tension.
Embodiment 4
A kind of fixed steady phase optical cable of bilayer includes successively from the inside to the outside：G.652D optical fiber, the first tight sleeve layer and second are fixed
Layer.
First tight sleeve layer is 7N with optical fiber ablation power, and for the LCP materials of molecular orientation arrangement, thickness is in 0.2mm
Between, elasticity modulus 11GPa, coefficient of thermal expansion is 1 × 10-7/K.First tight sleeve layer is polyparaphenylene terephthaldehyde
Amide, melt-flow index 17.
Second tight sleeve layer is ethylene tetrafluoroethylene copolymer, melt-flow index 14, thickness 0.15mm, with first
The peeling force of tight sleeve layer is between 5.2N.The second tight sleeve layer deformation ratio is 400%.
The fixed steady phase optical cable of bilayer is prepared as follows：
(1) first time extrusion moulding：It will G.652D optical fiber and the first fixed layer material be obtained by extruding machine extrusion moulding
The steady phase optical cable of extrusion molding；
230 DEG C~280 DEG C of the optical fiber preheating temperature, preheating time 1s to 3s
The first fixed layer material is phenylene-terephthalamide, melt-flow index 17；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；100 DEG C of preliminary drying temperature, when preliminary drying
Between 10h；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；It is 320 DEG C to extrude die temperature, speed of production 150m/min；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2) is to 20 DEG C to 50 DEG C.
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；The second fixed layer material is ethyl tetra second
Alkene copolymer, melt-flow index 14；80 DEG C of preliminary drying temperature, preliminary drying time 3h；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；It is 310 to go out die temperature, and speed of production is
20m/min；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2) to 20 DEG C extremely
50 DEG C, take-up under 0.6N tension.
Embodiment 5
A kind of fixed steady phase optical cable of bilayer includes successively from the inside to the outside：G.652D optical fiber, the first tight sleeve layer and second are fixed
Layer.
First tight sleeve layer and optical fiber ablation power are in 9N, for the LCP materials of molecular orientation arrangement, thickness 0.1mm,
Elasticity modulus is 13GPa, and coefficient of thermal expansion is 0.1 × 10-7/K.First tight sleeve layer is polyparaphenylene paraphenylene terephthalamide
Amine, melt-flow index 20.
Second tight sleeve layer be ethylene tetrafluoroethylene copolymer, melt-flow index 21, thickness between 0.15mm, with
The peeling force of first tight sleeve layer is 4N.The second tight sleeve layer deformation ratio is 500%.
The fixed steady phase optical cable of bilayer is prepared as follows：
(1) first time extrusion moulding：It will G.652D optical fiber and the first fixed layer material be obtained by extruding machine extrusion moulding
The steady phase optical cable of extrusion molding；
230 DEG C~280 DEG C of the optical fiber preheating temperature, preheating time 1s to 3s
The first fixed layer material is phenylene-terephthalamide, melt-flow index 20；
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；120 DEG C of preliminary drying temperature, when preliminary drying
Between 6h；
(1-2) injects extrusion molding mould by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled, with preheating
Optical fiber carries out extrusion molding by extruding machine together；It is 400 DEG C to extrude die temperature, speed of production 180m/min；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2) is to 20 DEG C to 50 DEG C.
(2) second of extrusion moulding are logical by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material
Extruding machine extrusion moulding is crossed, the fixed steady phase optical cable of bilayer is obtained；
Described second fixed layer material is carried out preliminary drying processing by (2-1)；The second fixed layer material is ethyl tetra second
Alkene copolymer, melt-flow index 21；40 DEG C of preliminary drying temperature, preliminary drying time 8h；
(2-2) injects extrusion molding mould by what is obtained in step (2-1) through the second fixed layer material that preliminary drying is handled, with step
(1) the steady phase optical cable of an extrusion molding obtained in carries out extrusion molding by extruding machine together；It is 350 DEG C to go out die temperature, speed of production
For 20m/min；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2) to 20 DEG C extremely
50 DEG C, take-up under 0.6N tension.
In order to improve between the first tight sleeve layer and optical fiber, the first tight sleeve layer and the second tight sleeve layer be tightly combined degree to
Further decrease the temperature drift coefficient of optical cable, the first tight sleeve layer, the material selection of the second tight sleeve layer and extrusion moulding technique
Selection is very crucial.The temperature drift coefficient of optical cable can be made by theoretically reaching the material of physicochemical property of the presently claimed invention
Reduction to a certain extent.And the first fixed layer material and the second fixed layer material that embodiment uses, it can make optical cable
While temperature drift coefficient is reduced to desired level, more optimize in mechanical performance and geometric dimension.Meanwhile embodiment carries
The method of confession is directed to the first fixed layer material and the second fixed layer material, optimizes to secondary extrusion process parameter so that light
It combines closely between fine and the first tight sleeve layer, between the first tight sleeve layer and the second tight sleeve layer, to improve peeling force, mainly for
Extrusion moulding goes out die temperature, speed of production；Especially increase preliminary drying link so that an extrusion moulding and secondary extrusion moulding
When, between optical fiber and the first tight sleeve layer, molecule activation between the first tight sleeve layer and the second tight sleeve layer, it is possible to create a degree of
Intermolecular force, to greatly improve peeling force so that temperature drift coefficient further decreases.Wherein for second of extrusion molding
Molding, to control the temperature that final take-up is and tension could make between optical fiber and the first tight sleeve layer due to being extruded into for the first time
The combination that type is formed is not adversely effected, while the degree that is tightly combined between the first tight sleeve layer and the second tight sleeve layer reaches and wants
It asks.
Embodiment 6
Steady phase optical cable obtained, performance evaluation are as shown in table 1 in embodiment 1 to 5：
Temperature drift coefficient follows the optical path difference under case test product different temperatures by CD400 and temperature, and passes through calculating
Obtain the mean temperature coefficient of deviation of product -55~125 DEG C；
The attenuation of 1310nm and 1550nm, is tested by PK8000；
The steady phase optical cable of the double-deck tight sleeve layer prepared by embodiment 1 follows case test product different temperatures by CD400 and temperature
The lower optical path length of section, and by calculating and data fitting, obtaining within the scope of -55~125 DEG C, product temperature sensitivity coefficient with
Temperature variation curve is shown in Fig. 2 with the comparison curves of conventional G652D bare fibres.The steady phase optical cable tensile strength can reach 30 to
60N has excellent mechanical performance, optical cable can be used as to be used alone, and can be used for optical cable as other purposes
Unit.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of fixed steady phase optical cable of bilayer, which is characterized in that include successively from the inside to the outside：Optical fiber, the first tight sleeve layer and second
Tight sleeve layer；First tight sleeve layer and optical fiber ablation power in 2N between 9N, for the LCP materials of molecular orientation arrangement, thickness
In 0.05mm between 0.3mm, elasticity modulus is 10GPa to 13GPa, and coefficient of thermal expansion is -1~1 × 10-7/K。
2. the double-deck fixed steady phase optical cable as described in claim 1, which is characterized in that first tight sleeve layer is polyparaphenylene
Terephthalamide, melt-flow index is between 15~35, preferably between 17~26.
3. the double-deck fixed steady phase optical cable as described in claim 1, which is characterized in that second tight sleeve layer is ethyl tetra second
Alkene copolymer, melt-flow index between 10 to 25, thickness in 0.05mm between 0.15mm, the peeling force with the first tight sleeve layer
In 0.8N between 6N.
4. fixed steady phase optical cable as claimed in claim 3 double-deck, which is characterized in that the second tight sleeve layer deformation ratio be more than or
Equal to 400%.
5. the preparation method of the fixed steady phase optical cable of bilayer as described in Claims 1-4 any one, which is characterized in that including
Following steps：
(1) first time extrusion moulding：By optical fiber and the first fixed layer material by extruding machine extrusion moulding, it is steady to obtain an extrusion molding
Phase optical cable；
(2) second of extrusion moulding, by the steady phase optical cable of an extrusion molding obtained in step (1) and the second fixed layer material by squeezing
Molding machine extrusion moulding obtains the fixed steady phase optical cable of bilayer.
6. the preparation method of fixed steady phase optical cable as claimed in claim 5 double-deck, which is characterized in that step (1) includes：
Described first fixed layer material is carried out preliminary drying processing by (1-1), and optical fiber is preheated；
(1-2) injects extrusion molding mould, the optical fiber with preheating by what is obtained in step (1-1) through the first fixed layer material that preliminary drying is handled
Extrusion molding is carried out by extruding machine together；
The optical fiber air cooling with the first tight sleeve layer that (1-3) obtains extrusion molding in step (1-2).
7. the preparation method of the double-deck fixed steady phase optical cable as claimed in claim 6, which is characterized in that step (1-1) described light
230 DEG C~280 DEG C of fine preheating temperature, preheating time 1s to 3s.
8. the preparation method of the fixed steady phase optical cable of bilayer as claimed in claims 6 or 7, which is characterized in that described first is fixed
Layer material is phenylene-terephthalamide, and melt-flow index is between 15~35, preferably between 17~26；
The described first fixed 100 DEG C to 150 DEG C of layer material preliminary drying temperature of step (1-1), preliminary drying time 6h to 15h；
It is 320~400 DEG C that step (1-2), which extrudes die temperature, and speed of production is 150~250m/min；
Step (1-3) air cooling is to 20 DEG C to 50 DEG C.
9. the preparation method of the fixed steady phase optical cable of bilayer as described in claim 5 to 8 any one, which is characterized in that described
Step (2) includes：
Described second fixed layer material is carried out preliminary drying processing by (2-1)；
(2-2) will be in the second fixed layer material injection the extrusion molding mould, with step (1) handled through preliminary drying that obtained in step (2-1)
The steady phase optical cable of an extrusion molding obtained carries out extrusion molding by extruding machine together；
The optical fiber air cooling take-up with the double-deck tight sleeve layer that (2-3) obtains extrusion molding in step (2-2).
10. the preparation method of the double-deck fixed steady phase optical cable as claimed in claim 9, which is characterized in that second tight sleeve layer
Material is ethylene tetrafluoroethylene copolymer, and melt-flow index is between 10 to 25；
The described second fixed 40 DEG C to 100 DEG C of layer material preliminary drying temperature of step (2-1), preliminary drying time 3h to 8h；
It is 310~350 DEG C that step (2-2), which extrudes die temperature, and speed of production is 20~60m/min；
Step (2-3) air cooling is to 20 DEG C to 50 DEG C, take-up under 0.6N to 2.0N tension.
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| CN113406757A (en) * | 2021-06-16 | 2021-09-17 | 江苏中天科技股份有限公司 | Butterfly-shaped optical cable and preparation method thereof |
| CN114236727A (en) * | 2022-01-05 | 2022-03-25 | 深圳市特发信息光网科技股份有限公司 | Double-layer tight-buffered optical fiber and method and apparatus for making same |
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