CN110531475A - Easily peelable flexible optical fibre micro-pipe - Google Patents
Easily peelable flexible optical fibre micro-pipe Download PDFInfo
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- CN110531475A CN110531475A CN201910816816.4A CN201910816816A CN110531475A CN 110531475 A CN110531475 A CN 110531475A CN 201910816816 A CN201910816816 A CN 201910816816A CN 110531475 A CN110531475 A CN 110531475A
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- pipe
- optical fiber
- easily peelable
- sheath
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A kind of easily peelable flexible optical fibre micro-pipe provided by the invention, the filler between micro-pipe sheath and several optical fiber and micro-pipe sheath including several optical fiber and cladding on the outside, several optical fiber equivalent circle diameters less than 90% and are more than or equal to 70% in the accounting of the micro-pipe sheath lumen, the filler accounts for 60% or more of gap between several optical fiber and micro-pipe sheath, and obstruct several optical fiber and contacted with micro-pipe jacket inner wall, the micro-pipe sheath is elastomeric material.Micro-pipe sheath of the invention uses elastomeric material, can not be by tool, unarmed stripping；In the removing of micro-pipe sheath, gap fillers act synergistically with micro-pipe sheath material as buffering, do not damage fibre coating.
Description
Technical field
The present invention relates to optical cable technology fields, particularly relate to a kind of easily peelable flexible optical fibre micro-pipe.
Background technique
Optical fiber and sheath are the basic elements for forming optical cable, and outside of fiber usually has a protective layer or protection pipe,
Referred to as tight sleeve layer, hemicompact jacket layer or Loose tube.Tight tube fiber is usually the primary element for manufacturing various inside cables, can individually be made
With can be used for making tail optical fiber, for all kinds of active or passive device connection and the connection of instrument, terminal device, tight sleeve layer
Material is generally low-smoke halide-free fireproof composite polyolefine material LSZH, pvc material PVC or nylon material PA.Shao of fixed material
Family name's hardness HATypically larger than 90.In outdoor optical cable, to protect optical fiber by internal stress and outer side pressure influence, not exist usually
Optical fiber outer jacket moulds a layer loose sleeve, and Loose tube material is usually polybutylene terephthalate (PBT) PBT, polycarbonate or poly- third
Alkene PP.The shore hardness H of Loose tube materialDTypically larger than 70, belong to medium rigid plastics.
Above-mentioned tight tube fiber tight sleeve layer and Loose tube removing require to carry out stripping using specific purpose tool, in removing tight sleeve layer
Or when Loose tube, optical fiber coating is be easy to cause to damage；And Loose tube is hard, in the small place of bending radius, be easy to cause
Loose tube bending, causes to decay exceeded, or even fibercuts occur；Loose tube is shunk in cable splice closure, is easy to lead
Optical fiber attenuation is caused to increase.
Summary of the invention
In view of the foregoing, it is necessary to provide a kind of improved easily peelable flexible optical fibre micro-pipe, sheath can unarmed stripping
And fibre coating is not damaged, and it is soft not to be bent, micro-pipe performance is made and stablizes.
Technical solution provided by the invention are as follows: a kind of easily peelable flexible optical fibre micro-pipe, including several optical fiber and it is coated on it
Filler between the micro-pipe sheath and several optical fiber and micro-pipe sheath in outside, several optical fiber equivalent circle diameters are in the micro-pipe
For the accounting of sheath lumen less than 90% and more than or equal to 70%, the filler accounts for gap between several optical fiber and micro-pipe sheath
60% or more, and obstruct several optical fiber and contacted with micro-pipe jacket inner wall, the micro-pipe sheath is thermoplastic elastic material.
Further, several optical fiber equivalent circle diameters are in the accounting of the micro-pipe sheath lumen between 70%-80%.
Further, the thermoplastic elastic material includes thermoplastic polyether ester elastomer, thermoplastic polyurethane -ester bullet
Property body, thermoplastic polyurethane-ether elastomer, thermoplastic polyurethane copolyether ester elastomer, thermoplastic polyether amide elastomer, thermoplasticity
One of polyester elastomer or thermoplastic polyurethane.Preferred thermoplastic polyesters elastomer or thermoplastic polyether ester elastomer or heat
Plastic polyurethane, such as polybutylene terephthalate ethylene glycol block copolymer.
Further, the micro-pipe sheath with a thickness of 0.1-0.2mm.
Further, the filler includes silicone oil and thickener, and the quality proportioning of the two is 20:1~10:1.
Further, the filler is that 20 parts of silicone oil and 1 part of thickener form by mass fraction.
Further, the filler is that 10 parts of silicone oil and 1 part of thickener form by mass fraction.
Further, the thickener includes silica, bentonite, polytetrafluoroethylene (PTFE) or their mixture.
Further, the single fibre external diameters are 250 ± 10 μm, when micro-pipe sheath inner fiber quantity is 4,6,12
Root and at 24, the outer diameter of the micro-pipe is set as 0.9 ± 0.1mm, 1.1 ± 0.1mm, 1.4 ± 0.1mm and 2.0 ± 0.1mm.
Further, the single fibre external diameters are 200 ± 10 μm, when micro-pipe sheath inner fiber quantity is 4,6,12
Root and at 24, the outer diameter of the micro-pipe is set as 0.8 ± 0.1mm, 1.0 ± 0.1mm, 1.3 ± 0.1mm and 1.8 ± 0.1mm.
Compared with prior art, micro-pipe sheath uses elastomer material in easily peelable flexible optical fibre micro-pipe provided by the invention
Material, can not be by tool, unarmed stripping；In the removing of micro-pipe sheath, gap fillers are assisted as buffering with micro-pipe sheath material
Same-action does not damage fibre coating；Micro-pipe sheath is soft, does not bend；Optical fiber micro-pipe performance in cable splice closure
Stablize, does not shrink.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the structural schematic diagram of easily peelable flexible optical fibre micro-pipe in an embodiment of the present invention.
Description of symbols:
Flexible optical fibre micro-pipe 10
Micro-pipe sheath 1
Optical fiber 2
Filler 4
The embodiment of the present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the embodiment of the present invention, with reference to the accompanying drawing and
The present invention will be described in detail for specific embodiment.It should be noted that in the absence of conflict, the embodiment party of the application
Feature in formula can be combined with each other.
Embodiment in the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, described reality
Applying mode is only some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to this hair
The range of bright embodiment protection.
" SZ strand " is to control to strand herein.The strand of process to being divided into left-hand and dextrad, left-hand likeness in form " S " be also known as S to,
Dextrad likeness in form " Z " is also known as Z-direction.
Thermoplastic polyether ester elastomer herein, also known as thermoplastic polyester elastomer TPEE are a kind of containing fragrant adoption
The block copolymer in two-phase laminated flow microstructure of ester hard section and polyether ester soft segment, wherein soft segment and do not crystallize hard section and formed
Amorphous continuous phase, part hard section crystalline play physical crosslinking point at dispersed phase.The mechanical strength of hard section offer TPEE
With thermoplasticity processing performance；Soft segment provides resistance to low temperature and elasticity.
Thermoplastic polyester elastomer herein refers to the block copolymer of polyester hard section and polyester soft segment.
It is well known that thermoplastic polyurethane elastomer is also known as thermoplastic polyurethane rubber, abbreviation TPU is a kind of (AB) N-shaped
Block linear polymer, A are the polyester or polyethers of high molecular weight (1000~6000), and B is two containing 2~12 carbons
Alcohol, chemical structure is diisocyanate between AB segment.Thermoplastic polyurethane rubber is between intermolecular hydrogen bonding crosslinking or macromolecular chain
It is lightly crosslinked, it as the temperature rises or reduces, both cross-linked structures have invertibity.In molten condition or solution state point
Power weakens between son, and has strong molecular separating force to link together after the volatilization of cooling or solvent, restores the performance of original solid.
Typical TPU such as spandex etc..
Thermoplastic polyurethane herein, thermoplastic polyurethane -ester elastomer, thermoplastic polyurethane-ether elastomer, thermoplasticity
It only includes polyurethane, including polyurethane and polyester, including polyurethane and polyethers, or packet that polyurethane ether ester elastomer, which refers respectively to A,
Include polyurethane and polyether ester.
Thermoplastic polyether amide elastomer herein is polyether block amide structural body, such as Atochem company, the U.S.
PEBA。
Unless otherwise defined, all technical and scientific terms used herein and the technology for belonging to the embodiment of the present invention
The normally understood meaning of the technical staff in field is identical.Term as used herein in the specification of the present invention is intended merely to
The purpose of specific embodiment is described, it is not intended that in the limitation embodiment of the present invention.
Referring to Fig. 1, the present invention provides a kind of easily peelable flexible optical fibre micro-pipe 10, including several optical fiber 2 and micro-pipe shield
1 composition of set, wherein micro-pipe sheath 1 is coated on outside several optical fiber 2, is filled between several 2 surface layers of optical fiber and the inner wall of micro-pipe sheath 1
There is filler 4.
Optical fiber 2, usually single mode optical fiber, surface layer are equipped with protective coating；There is multifiber 2 in each micro-pipe sheath 1
When, it can be distinguished by colouring, that is, form colored optical fiber.The diameter of simple optical fiber 2 can be nominal 250 μm, 200 μm or
180μm.Multifiber 2 is usually SZ twisted in micro-pipe sheath 1.Multifiber equivalent diameter formula are as follows: D=1.16 × n1/2
× d, wherein n is number of fibers, and d is fibre diameter.
Micro-pipe sheath 1, is elastomeric material, and wall thickness can not manually tear off at least 1 between 0.1-0.2mm by tool
Rice.The density of the micro-pipe sheath material is usually in 1~1.5g/cm3, tensile strength is usually 10-20MPa, and elongation at break exists
Between 100%~500%, shore hardness HDLess than or equal to 30, and tearing strength≤60kN/m.The micro-pipe sheath material can be
Thermoplastic polyether ester elastomer, thermoplastic polyurethane -ester elastomer, thermoplastic polyurethane-ether elastomer, thermoplastic polyurethane ether
One of ester elastomer, thermoplastic polyether amide elastomer, thermoplastic polyester elastomer or thermoplastic polyurethane.It is preferred that thermoplastic
Property polyester elastomer or thermoplastic polyether ester elastomer or thermoplastic polyurethane, such as polybutylene terephthalate ethylene glycol block
Copolymer, so that optical fiber micro-pipe sheath can not easily tear off at least 1 meter by tool.The thermoplastic elastomer (TPE) performance is stablized, material
Expect shrinking percentage < 3%, optical fiber micro-pipe is not shunk in connector box, it is ensured that optical cable communication line communication is stablized.
Filler 4, generally ointment are made of basic silicone oil and thickener in a specific embodiment, wherein silicone oil with
The mass ratio of thickener is usually 20:1~10:1, the thickener can for silica, bentonite, polytetrafluoroethylene (PTFE) or it
Mixture.The oxidation induction period of above-mentioned ointment is with the heating rate of 10 DEG C/min, when test temperature reaches 190 DEG C, usually
Greater than 50min；Density is less than 0.85g/cm3；At 25 DEG C, shearing frequency 6s-1When, dynamic viscosity is more than or equal to
15000mPa·S；At 70 DEG C, shearing frequency 6s-1When, dynamic viscosity is more than or equal to 10000mPaS.In specific embodiment party
In formula, the present invention designs above-mentioned ointment filling 1 inner cavity gap of micro-pipe sheath in 10 section of optical fiber micro-pipe and (removes optical fiber institute duty
Between) 60% or more, on the one hand can guarantee that longitudinal leakage of water does not occur for optical fiber micro-pipe 10, another aspect ointment has obstructed light
Fibre 2 and micro-pipe sheath 1, and ointment has certain elasticity, when sheath 1 is removed, ointment, which can be digested and assimilated, is partially stripped power, portion
Divide buffer function in the shearing force on optical fiber 2, it is unlikely that fibre coating is caused to damage.
The coating of optical fiber 2 is not damaged when to ensure to tear off micro-pipe sheath 1, if the present invention also designs in 10 section of optical fiber micro-pipe
Dry optical fiber equivalent circle diameter is less than the 90% of micro-pipe sheath internal diameter, and optical fiber 2 is made to guarantee that certain space is rich in micro-pipe sheath 1
Remaining is unlikely to be in close contact with fibre coating and generate larger peeling force and inevitably friction.Optimization design light simultaneously
Several optical fiber equivalent circle diameters are more than or equal to the 70% of micro-pipe sheath internal diameter in fine 10 section of micro-pipe, can so efficiently use micro-
The spatial area of 1 inner cavity of tube boot so that containing identical quantity optical fiber micro-pipe outer diameter sheath it is smaller, be conducive to optical cable micromation,
Lightweight；In other words, meet it is easily peelable, do not damage fibre coating under the premise of, guarantee light in the micro-pipe sheath of certain size
Fine quantity is enough to ensure to communicate high capacity and high stability.
Test and verification is carried out to the performance of easily peelable flexible optical fibre micro-pipe 10 of the invention combined with specific embodiments below.
Embodiment 1
The number of fibers of easily peelable flexible optical fibre micro-pipe 10 is 12 cores, i.e. 12 optical fiber 2 in every micro-pipe 10, light in this example
Fine 2 colors are respectively blue, orange, green, brown, grey, white, red, black, yellow, purple, pink, dark green, using G.652D optical fiber, light after coloring
Fine coating diameter is 250 μm ± 15 μm, and 12 optical fiber are twisted using SZ in micro-pipe sheath 1.
Factice for filling in micro-pipe sheath 1 in this example, oxidation induction period are greater than 50min；It includes 20 parts of silicone oil and 1 part that it, which is formed,
Silica composition；Density is less than 0.85g/cm3；At 25 DEG C, when shearing frequency is 6s-1, dynamic viscosity 15200mPa
S；At 70 DEG C, when shearing frequency is 6s-1, dynamic viscosity 10800mPaS.
1 material of micro-pipe sheath is polybutylene terephthalate ethylene glycol block copolymer, density about 1.1g/ in this example
cm3, tensile strength 17MPa, elongation at break 210%, shore hardness HDIt is 21, and tearing strength is 54kN/m, wall thickness
For 0.1mm, in other words, tear edge=54kN/m × 0.1mm=5.4N can not protect manually by tool, that is, peelable micro-pipe
Layer, and test result is also shown that and is firmly no more than 10N, does not damage internal optical fiber.
10 outer diameter of optical fiber micro-pipe is 1.4 ± 0.1mm in this example, and optical fiber equivalent circle diameter accounts for the ratio of micro-pipe sheath internal diameter
It is preferred that 70-80%, i.e. space surplus capacity abundance will not fibre damage, and make space effective rate of utilization high.When 2 diameter of optical fiber is
250 μm, optical fiber equivalent circle diameter is about 1.0mm, and micro-pipe sheath 1 is with a thickness of 0.1mm, optical fiber equivalent circle diameter accounting micro-pipe
Sheath internal diameter 60% when, optical fiber micro-pipe outer diameter is about 1.88mm；Optical fiber equivalent circle diameter accounting micro-pipe sheath internal diameter
When 70%, optical fiber micro-pipe outer diameter is about 1.63mm；Optical fiber equivalent circle diameter accounting micro-pipe sheath internal diameter 90% when, optical fiber is micro-
Pipe outside diameter is about 1.31mm；Optical fiber equivalent circle diameter accounting micro-pipe sheath internal diameter 80% when, optical fiber micro-pipe outer diameter is about
1.45mm；When accounting is changed to 90% by 60%, optical fiber micro-pipe outer diameter gradually reduce 0.25mm (be higher than twice of jacket thickness value),
0.18mm and 0.14mm, the range of contraction more become smaller, in conjunction with the design of spatial margin and the usage amount of ointment and cost, preferably
Accounting is 70-80%.
Embodiment 2
Be equipped with 24 optical fiber in this example in every optical fiber micro-pipe, optical fiber color be respectively it is blue, orange, green, brown, grey, white, red,
Black, yellow, purple, powder, viridescent, remaining 12 optical fiber are blue plus 1 black line, orange plus 1 black line, green plus 1 black line, palm fibre
1 black line, ash plus 1 black line, 1 black line of Bai Jia, red plus 1 black line, true qualities are added to add 1 black line, Huang Jia 1
Black line, purple plus 1 black line, powder add 1 black line, dark green plus 1 black line, adjacent colo(u)r streak distance about 150mm, and optical fiber is adopted
With G.657A2 optical fiber, fibre coating diameter is 200 μm ± 10 μm after coloring, is twisted in micro-pipe sheath inner fiber using SZ.
Factice for filling in micro-pipe sheath in this example, oxidation induction period are greater than 50min；It includes 10 parts of silicon that it is formed by weight
Oil and 0.5 part of bentonite and 0.5 part of polytetrafluoroethylene (PTFE) composition；Density is less than 0.85g/cm3；At 25 DEG C, shearing frequency 6s-1
When, dynamic viscosity 15200mPaS；At 70 DEG C, shearing frequency 6s-1When, dynamic viscosity 10800mPaS.
Micro-pipe sheath material is thermoplastic polyether amide elastomer in this example, such as block structure is as follows:
Its density about 1.2g/cm3, tensile strength 18MPa, elongation at break 212%, shore hardness HDIt is 22, and tears
Resistance to spalling is 53kN/m, wall thickness 0.15mm, tear edge=53kN/m × 0.1mm=7.95N.
Optical fiber micro-pipe outer diameter is 1.8 ± 0.1mm in this example, and the ratio that optical fiber equivalent circle diameter accounts for micro-pipe sheath internal diameter is same
The preferred 70-80% of sample.
Following table 1 lists different fibre external diameters and quantity, the numerical value of preferred optical fiber micro-pipe outer diameter.
Table 1
The easily peelable flexible optical fibre micro-pipe 10 of aforementioned present invention using thermoplastic elastic material as micro-pipe sheath material,
It is soft, shore hardness HDLess than 30, minimum bending radius is not bent up to 5mm；Elasticity is good for the sheath material, system
The optical fiber micro-pipe obtained is heat-resisting, chemical-resistance is stablized, and will not shrink in connector box, plays protection to optical fiber always；The shield
Cover material tearing strength is no more than 60kN/m, can not firmly be no more than 10N, unarmed stripping, and interior by tool when need to remove
The ointment of portion's filling has pooling feature, cooperates with sheath material attribute, and when removing does not damage the coating of optical fiber.
Embodiment of above is only to illustrate the technical solution of the embodiment of the present invention rather than limits, although referring to above preferable
The embodiment of the present invention is described in detail in embodiment, those skilled in the art should understand that, it can be to this hair
The technical solution of bright embodiment is modified or equivalent replacement should not all be detached from the embodiment of the present invention technical solution spirit and
Range.
Claims (10)
1. a kind of easily peelable flexible optical fibre micro-pipe, including several optical fiber and cladding micro-pipe sheath on the outside and several optical fiber with
Filler between micro-pipe sheath, it is characterised in that: accounting of several optical fiber equivalent circle diameters in the micro-pipe sheath lumen
Less than 90% and more than or equal to 70%, the filler accounts for 60% or more of gap between several optical fiber and micro-pipe sheath, and
It obstructs several optical fiber to contact with micro-pipe jacket inner wall, the micro-pipe sheath is thermoplastic elastic material.
2. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: several optical fiber equivalent circle diameters exist
The accounting of the micro-pipe sheath lumen is between 70%-80%.
3. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: the thermoplastic elastic material packet
Include thermoplastic polyether ester elastomer, thermoplastic polyurethane -ester elastomer, thermoplastic polyurethane-ether elastomer, thermoplastic polyurethane
One of copolyether ester elastomer, thermoplastic polyether amide elastomer, thermoplastic polyester elastomer or thermoplastic polyurethane.
4. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: the micro-pipe sheath with a thickness of
0.1-0.2mm。
5. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: the filler includes silicone oil and increasing
Thick dose, the quality proportioning of the two is 20:1~10:1.
6. easily peelable flexible optical fibre micro-pipe according to claim 5, it is characterised in that: the thickener includes titanium dioxide
Silicon, bentonite, polytetrafluoroethylene (PTFE) or their mixture.
7. easily peelable flexible optical fibre micro-pipe according to claim 5, it is characterised in that: the filler is by mass fraction
20 parts of silicone oil and 1 part of thickener composition.
8. easily peelable flexible optical fibre micro-pipe according to claim 5, it is characterised in that: the filler is by mass fraction
10 parts of silicone oil and 1 part of thickener composition.
9. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: the single fibre external diameters are 250
± 10 μm, when micro-pipe sheath inner fiber quantity is 4,6,12 and 24, the outer diameter of the micro-pipe is set as 0.9 ±
0.1mm, 1.1 ± 0.1mm, 1.4 ± 0.1mm and 2.0 ± 0.1mm.
10. easily peelable flexible optical fibre micro-pipe according to claim 1, it is characterised in that: the single fibre external diameters are 200
± 10 μm, when micro-pipe sheath inner fiber quantity is 4,6,12 and 24, the outer diameter of the micro-pipe is set as 0.8 ±
0.1mm, 1.0 ± 0.1mm, 1.3 ± 0.1mm and 1.8 ± 0.1mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910816816.4A CN110531475B (en) | 2019-08-30 | 2019-08-30 | Easy-to-strip flexible optical fiber micro-tube |
| PCT/CN2019/126742 WO2021036112A1 (en) | 2019-08-30 | 2019-12-19 | Strippable flexible optical fiber microtube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910816816.4A CN110531475B (en) | 2019-08-30 | 2019-08-30 | Easy-to-strip flexible optical fiber micro-tube |
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| Publication Number | Publication Date |
|---|---|
| CN110531475A true CN110531475A (en) | 2019-12-03 |
| CN110531475B CN110531475B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910816816.4A Active CN110531475B (en) | 2019-08-30 | 2019-08-30 | Easy-to-strip flexible optical fiber micro-tube |
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| CN (1) | CN110531475B (en) |
| WO (1) | WO2021036112A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021036112A1 (en) * | 2019-08-30 | 2021-03-04 | 江苏中天科技股份有限公司 | Strippable flexible optical fiber microtube |
| CN114895416A (en) * | 2022-05-06 | 2022-08-12 | 杭州富通通信技术股份有限公司 | Optical fiber ribbon cable |
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| WO2021036112A1 (en) * | 2019-08-30 | 2021-03-04 | 江苏中天科技股份有限公司 | Strippable flexible optical fiber microtube |
| CN114895416A (en) * | 2022-05-06 | 2022-08-12 | 杭州富通通信技术股份有限公司 | Optical fiber ribbon cable |
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| Publication number | Publication date |
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| WO2021036112A1 (en) | 2021-03-04 |
| CN110531475B (en) | 2020-10-09 |
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