CN107479156A - A kind of flexible loose tube cable - Google Patents
A kind of flexible loose tube cable Download PDFInfo
- Publication number
- CN107479156A CN107479156A CN201710736139.6A CN201710736139A CN107479156A CN 107479156 A CN107479156 A CN 107479156A CN 201710736139 A CN201710736139 A CN 201710736139A CN 107479156 A CN107479156 A CN 107479156A
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- CN
- China
- Prior art keywords
- loose tube
- flexible
- cable
- tpee
- flexible loose
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4434—Central member to take up tensile loads
-
- 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
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention relates to a kind of flexible loose tube cable, include oversheath and cable core, described cable core includes the Loose tube of jacketed fiber, it is characterized in that described Loose tube is flexible Loose tube, described flexible Loose tube is fabricated from a flexible material, and described flexible material is TPEE, modified TPEE, TPU, PP or PE.The flexible Loose tube of the present invention not only possesses the machinery and corrosion resisting property of conventional Loose tube, also there is excellent flexibility and bending property, Loose tube and optical cable can be made to reach less bending radius without bending, can be matched with bend insensitive fiber, show excellent warping resistance performance；When continued access disk stays, flexible Loose tube can be directly as the sheath after optical fiber welding, and bent under less bending radius, thus stay disk taken up space small, required connector box size is also corresponding smaller, the appearance fibre rate of Optical Cable device is high, easy damaged or does not fracture when present invention storage and construction, easy to use.
Description
Technical field
The present invention relates to a kind of flexible loose tube cable, belong to photoelectricity transmission technical field.
Background technology
Existing conventional cable configuration includes layer-stranding cable and central-beam tube type fiber optic cable, the cable cores of these optical cables be all by
The Loose tube for being set with optical fiber is formed.Loose tube in existing optical cable mostly uses polybutylene terephthalate (PBT)（PBT）System
It is standby to form.PBT has the performance such as good solvent resistant, oil resistant, resistant to chemical etching, while has higher crystallinity, thus has
There are higher intensity and hardness, be the ideal material of conventional cable Loose tube.
But the bending performance of PBT sleeve pipes is poor, the minimum bending radius that can reach is larger, generally in 8D（D is Loose tube
Diameter）More than, for the preferable optical fiber of bending resistance, excellent counter-bending of optical fiber can not be given full play to using PBT sleeve pipes
Performance, if G652.D, G657.A1 minimum bending radius are up to 15mm, G657.A2 minimum bending radius is up to 7.5mm.Meanwhile
When optical cable continued access and disk are stayed, there is also some problems：First, it is unfavorable for the miniaturization of splicing device.Need to make during optical cable continued access
With connector box, optical cable needs stripping to expose optical fiber and by being welded together in connector box, and the optical fiber after welding can not be naked
Dew is, it is necessary to cover last layer protective case protection optical fiber and carry out disk and stay.In most cases, Loose tube pair can be directly used during construction
Optical fiber is protected.Protected using PBT sleeve pipes and when disk stays, because the radius bend that PBT sleeve pipes can reach is larger, disk stays
Shared bulk is larger afterwards, and corresponding connector box size is also larger, so as to cause the size of whole Optical Cable larger, utilization rate
Low, cost is high.Second, limit the use in some Special sections.In some special regional such as America, Optical Cable needs
Protective case of the sleeve pipe as optical fiber is used, and connector box volume is very small.In this case, if being carried out using PBT sleeve pipes
Protection, the larger shared bulk of sleeve pipe bending radius is also larger when disk stays, it is difficult to meets the requirement of connector box size, it is necessary to increase
Extra soft protection pipe could carry out disk and stay.In addition, PBT sleeve pipe warping resistance poor performances, the frangibility in storage and construction, to applying
Work brings inconvenience.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of flexible pine for above-mentioned the shortcomings of the prior art
Pipe optical cable is covered, the Loose tube not only has preferably machinery and corrosion resisting property, and have excellent flexibility and bending property.
The present invention is to solve the problems, such as that used technical scheme set forth above is：Include oversheath and cable core, it is described
Cable core include the Loose tube of jacketed fiber, it is characterised in that described Loose tube is flexible Loose tube, described flexibility pine
Sleeve pipe is fabricated from a flexible material, and described flexible material is TPEE（Thermoplastic polyester elastomer）, modified TPEE, TPU（Thermoplasticity
Polyurethane elastomer）、PP（Polypropylene）Or PE（High density polyethylene (HDPE)）.
By such scheme, described cable core is layer-twisted type cable core, described layer-twisted type cable core include center reinforcemen and
It is stranded in the flexible Loose tube of center reinforcemen periphery.
By such scheme, beam tube type cable core centered on described cable core, described central beam tube type cable core is by single flexible
Loose tube is formed, and cable core is coated with non-metal reinforced layer.
By such scheme, described flexible Loose tube minimum bending radius is 3 ~ 8 times of Loose tube external diameter, i.e. minimum bend
Radius reaches 3D ~ 8D（D is Loose tube external diameter）.
By such scheme, described TPEE is block copolymer, and soft segment is polyethers section, and hard section is polyester segments, and density is
1.25g/cm3, fusing point is 216 DEG C.
By such scheme, described modification TPEE is that PBT melt blendings are modified TPEE, by TPEE and PBT mixed meltings
Into, wherein TPEE content by weight 15 ~ 85%, surplus PBT.
By such scheme, the external diameter of described flexible Loose tube is 2.5 ± 0.05mm, unilateral wall thickness is 0.35 ±
0.05mm。
By such scheme, described TPU density is 1.27g/cm3, fusing point is 220 DEG C；Described PP density is 0.90g/
cm3, fusing point is 156 DEG C；The PE density is 0.95g/cm3, fusing point is 130 DEG C.
By such scheme, described flexible Loose tube is equipped with water blocking yarn or is filled with fine cream.
The beneficial effects of the present invention are：1st, the Loose tube of optical cable is flexible Loose tube, not only possesses conventional Loose tube
Machinery and corrosion resisting property, also with excellent flexibility and bending property, can make Loose tube and optical cable reach less bending radius
It without bending, can match with bend insensitive fiber, show excellent warping resistance performance；2nd, when continued access disk stays, flexible pine set
Pipe can be not required to the extra soft sheath of increase, when disk stays, flexible Loose tube can be less directly as the sheath after optical fiber welding
Bent under bending radius, thus it is taken up space small to stay disk, required connector box size is also corresponding smaller, and the appearance of Optical Cable device is fine
Rate is high, and cost is low；3rd, flexible Loose tube has an excellent warping resistance performance, easy damaged or does not fracture when storage and construction, uses
It is convenient, also improve efficiency of construction.
Brief description of the drawings
Fig. 1 is the radial junction composition of one embodiment of the invention.
Fig. 2 is the radial junction composition of second embodiment of the invention.
Fig. 3 is the radial junction composition of third embodiment of the invention.
Fig. 4 is the radial junction composition of four embodiment of the invention.
Embodiment
Below in conjunction with drawings and examples, the present invention is further illustrated.
Embodiment 1 includes oversheath and cable core, institute as shown in figure 1, be a kind of layer-twisted type flexibility loose tube cable structure
The periphery that the cable core stated is stranded in center reinforcemen 4 by more flexible Loose tubes 3 and gasket for packing 5 is formed, and center reinforcemen is non-
Metal center reinforcer, is made up of aramid yarn, and water blocking yarn is provided with outside cable core and forms water blocking layer 2, to ensure the water proofing property of optical cable
Can, the outermost layer of optical cable is oversheath 1, is provided with oversheath and opens hawser 6.Optical fiber 7 is set with flexible Loose tube 3 and is equipped with
Water blocking yarn 8, dry type Loose tube is formed, whole optical cable is Full-dry optical cable structure.
Described flexible Loose tube is fabricated from a flexible material, and described flexible material is TPEE（Thermoplastic polyester elastomer
Body）, modified TPEE, TPU（TPUE）、PP（Polypropylene）、PE（High density polyethylene (HDPE)）Any of.
The modified TPEE is that PBT melt blendings are modified TPEE, is formed by TPEE and PBT mixed meltings, wherein TPEE's
Content can be 85%, PBT content by weight 15% by weight；Or TPEE content 60%, PBT by weight
Content by weight 40%；Or TPEE content 40%, PBT content by weight 60% by weight；Or TPEE
Content 15%, PBT content by weight 85% by weight.
Embodiment 2 is as shown in Fig. 2 a kind of layer-twisted type flexibility loose tube cable for half dry type structure, it and a upper reality
Apply and be to be set with optical fiber 7 in flexible Loose tube and be filled with fine cream 9 be used as material water-proof material in place of the main difference of example, nothing blocks water
Yarn.The present embodiment flexibility Loose tube is prepared by being modified TPEE materials, TPEE content 60%, PBT content by weight
By weight 40%, the extrusion moulding after high-temperature fusion.
Embodiment 3 includes outer as shown in figure 3, a kind of central beam tube type flexibility loose tube cable structure for dry type
Sheath and cable core, described cable core are arranged in optical cable center by 1 flexible Loose tube 3 and formed, be set with flexible Loose tube
Optical fiber 7 is simultaneously equipped with water blocking yarn 8, forms dry type Loose tube；Loose tube 3 is externally provided with non-metal reinforced layer 10, and optical cable outermost layer is outer
Sheath 1.
Described flexible Loose tube is fabricated from a flexible material, and described flexible material is TPEE（Thermoplastic polyester elastomer
Body）, modified TPEE, TPU（TPUE）、PP（Polypropylene）、PE（High density polyethylene (HDPE)）Any of.
Embodiment 4 is as shown in figure 4, a kind of central beam tube type flexibility loose tube cable structure for half dry type, and it is with upper one
It is that fine cream 9 is filled with flexible Loose tube is used as material water-proof material in place of the main difference of individual embodiment.The flexible pine of the present embodiment
Sleeve pipe is prepared by being modified TPEE materials, TPEE content 40%, PBT content by weight 60% by weight, warp
Extrusion moulding after high-temperature fusion.
Comparative analysis：
The present invention using above-mentioned different flexible material be made Loose tube with made of PBT Loose tube compared with comparative example,
The external diameter of Loose tube is 2.5 ± 0.05mm, and unilateral wall thickness is 0.35 ± 0.05mm.The flexible minimum that can reach of Loose tube
Crooked process radius is characterized, and lateral pressure resistant performance is characterized with the maximum of short duration flat pressure that can reach.Normative reference GB/T
7424.2-2008《Optical cable generic specification part 2：The fundamental test method of optical cable》, pine made of multiple material of the present invention is covered
Pipe carries out lateral pressure resistant performance and bending performance test analysis with comparative example.As a result it is as shown in table 1.
Table 1
Note：The material of sleeve pipe 1 is PP；The material of sleeve pipe 2 is TPEE；The material of sleeve pipe 3 is modified TPEE, PBT:TPEE weight ratio is 15:
85；The material of sleeve pipe 4 is modified TPEE, PBT:TPEE weight ratio is 40:60;The material of sleeve pipe 5 is modified TPEE, PBT:TPEE weight
Than for 60:40;The material of sleeve pipe 6 is modified TPEE, PBT:TPEE weight ratio is 85:15；Comparative example is PBT material sleeve pipe.
It can be seen that, the buckle resistance of the flexible Loose tube made by material 1-6 can be superior to PBT Loose tubes from table,
Bending radius reaches 3 ~ 8 times of casing diameters.Wherein by the bending performance of the modified TPEE flexible Loose tubes being made with PBT
The increase of adding proportion and reduce, and lateral pressure resistant performance increases with the increase of PBT adding proportions.Thus, according to bending property
Energy requires and lateral pressure resistant performance requirement, can select different Loose tube materials, meet the requirement of different product.
Claims (9)
1. a kind of flexible loose tube cable, including oversheath and cable core, described cable core includes the Loose tube of jacketed fiber,
It is characterized in that described Loose tube is flexible Loose tube, described flexible Loose tube is fabricated from a flexible material, described flexibility
Material is TPEE, modified TPEE, TPU, PP or PE.
2. the flexible loose tube cable as described in claim 1, it is characterised in that described cable core is layer-twisted type cable core, described
Layer-twisted type cable core includes center reinforcemen and is stranded in the flexible Loose tube of center reinforcemen periphery.
3. the flexible loose tube cable as described in claim 1, it is characterised in that beam tube type cable core centered on described cable core, institute
The central beam tube type cable core stated is made up of single flexible Loose tube, and cable core is coated with non-metal reinforced layer.
4. the flexible loose tube cable as described in Claims 2 or 3, it is characterised in that described flexible Loose tube minimum bend half
Footpath is 3 ~ 8 times of Loose tube external diameter.
5. the flexible loose tube cable as described in Claims 2 or 3, it is characterised in that described TPEE is block copolymer, soft
Section is polyethers section, and hard section is polyester segments.
6. the flexible loose tube cable as described in Claims 2 or 3, it is characterised in that described modification TPEE is that PBT meltings are common
Mixed modification TPEE, formed by TPEE and PBT mixed meltings, wherein TPEE content by weight 15% ~ 85%.
7. the flexible loose tube cable as described in claim 2, it is characterised in that described center reinforcemen is metalloid core
Reinforcer.
8. the flexible loose tube cable as described in Claims 2 or 3, it is characterised in that described flexible Loose tube is equipped with water blocking yarn
Or it is filled with fine cream.
9. the flexible loose tube cable as described in Claims 2 or 3, it is characterised in that the external diameter of described flexible Loose tube is
2.5 ± 0.05mm, unilateral wall thickness are 0.35 ± 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736139.6A CN107479156A (en) | 2017-08-24 | 2017-08-24 | A kind of flexible loose tube cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736139.6A CN107479156A (en) | 2017-08-24 | 2017-08-24 | A kind of flexible loose tube cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107479156A true CN107479156A (en) | 2017-12-15 |
Family
ID=60601444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710736139.6A Pending CN107479156A (en) | 2017-08-24 | 2017-08-24 | A kind of flexible loose tube cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107479156A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456402A (en) * | 2018-02-09 | 2018-08-28 | 扬州金森光电材料有限公司 | A kind of composite modified Loose tube material of the TPEE and PBT of optical fiber ribbon cable |
| CN108646369A (en) * | 2018-07-27 | 2018-10-12 | 江苏亨通光电股份有限公司 | A kind of highly dense fiber optic bundle air-blowing micro-cable of easy stripping type layer-twisted type |
| CN108873208A (en) * | 2018-08-01 | 2018-11-23 | 江苏亨通光电股份有限公司 | A kind of novel termite proof cable |
| CN110041663A (en) * | 2019-03-21 | 2019-07-23 | 金发科技股份有限公司 | A kind of TPEE composite material and preparation method and application |
| WO2020024943A1 (en) * | 2018-08-01 | 2020-02-06 | 江苏亨通光电股份有限公司 | Lateral pressure-resistant remote optical cable |
| WO2020238934A1 (en) * | 2019-05-28 | 2020-12-03 | 长飞光纤光缆股份有限公司 | Flexible optical fiber ribbon loose tube optical cable |
| CN115542489A (en) * | 2022-10-17 | 2022-12-30 | 长飞光纤光缆股份有限公司 | Side-pressure-resistant and easily-bent optical unit, preparation method thereof and optical cable |
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| KR100492957B1 (en) * | 2003-02-25 | 2005-06-02 | 엘에스전선 주식회사 | Loose Tube Optical Cable |
| CN103064163A (en) * | 2013-01-18 | 2013-04-24 | 长飞光纤光缆有限公司 | Flame-retardant and fire-resistant optical cable |
| CN105860447A (en) * | 2016-06-28 | 2016-08-17 | 扬州大学 | Method for modifying thermoplastic polyester elastomer for loose tubes of optical fiber cables |
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| KR100492957B1 (en) * | 2003-02-25 | 2005-06-02 | 엘에스전선 주식회사 | Loose Tube Optical Cable |
| CN103064163A (en) * | 2013-01-18 | 2013-04-24 | 长飞光纤光缆有限公司 | Flame-retardant and fire-resistant optical cable |
| CN105860447A (en) * | 2016-06-28 | 2016-08-17 | 扬州大学 | Method for modifying thermoplastic polyester elastomer for loose tubes of optical fiber cables |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456402A (en) * | 2018-02-09 | 2018-08-28 | 扬州金森光电材料有限公司 | A kind of composite modified Loose tube material of the TPEE and PBT of optical fiber ribbon cable |
| CN108646369A (en) * | 2018-07-27 | 2018-10-12 | 江苏亨通光电股份有限公司 | A kind of highly dense fiber optic bundle air-blowing micro-cable of easy stripping type layer-twisted type |
| CN108873208A (en) * | 2018-08-01 | 2018-11-23 | 江苏亨通光电股份有限公司 | A kind of novel termite proof cable |
| WO2020024943A1 (en) * | 2018-08-01 | 2020-02-06 | 江苏亨通光电股份有限公司 | Lateral pressure-resistant remote optical cable |
| CN108873208B (en) * | 2018-08-01 | 2024-02-23 | 江苏亨通光电股份有限公司 | Ant-proof optical cable |
| CN110041663A (en) * | 2019-03-21 | 2019-07-23 | 金发科技股份有限公司 | A kind of TPEE composite material and preparation method and application |
| CN110041663B (en) * | 2019-03-21 | 2021-10-15 | 金发科技股份有限公司 | TPEE composite material and preparation method and application thereof |
| WO2020238934A1 (en) * | 2019-05-28 | 2020-12-03 | 长飞光纤光缆股份有限公司 | Flexible optical fiber ribbon loose tube optical cable |
| CN115542489A (en) * | 2022-10-17 | 2022-12-30 | 长飞光纤光缆股份有限公司 | Side-pressure-resistant and easily-bent optical unit, preparation method thereof and optical cable |
| CN115542489B (en) * | 2022-10-17 | 2023-11-10 | 长飞光纤光缆股份有限公司 | Lateral pressure resistant Yi Wanqu optical unit, preparation method thereof and optical cable |
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Application publication date: 20171215 |