CN113946025B - Flexible optical fiber ribbon, high-density optical cable and application of curing resin - Google Patents
Flexible optical fiber ribbon, high-density optical cable and application of curing resin Download PDFInfo
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- CN113946025B CN113946025B CN202111559018.1A CN202111559018A CN113946025B CN 113946025 B CN113946025 B CN 113946025B CN 202111559018 A CN202111559018 A CN 202111559018A CN 113946025 B CN113946025 B CN 113946025B
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- G—PHYSICS
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- 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
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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
- G02B6/4403—Optical cables with ribbon structure
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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
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Abstract
The invention discloses a flexible optical fiber ribbon, a high-density optical cable and application of cured resin. The flexible optical fiber ribbon comprises more than 3 single-core optical fibers which are arranged side by side on the same plane to form optical fiber arrangement; two sides of the optical fiber array are respectively provided with intermittent connecting parts which are not axially connected; the intermittent connecting part is used for flexibly connecting two adjacent single-core optical fibers; the intermittent connecting parts are distributed in a staggered mode, so that any one non-edge fiber is respectively connected with the left adjacent fiber and the right adjacent fiber at different axial positions. The intermittent connecting parts of the flexible optical fiber ribbon provided by the invention are distributed on the two sides of the optical fiber arrangement, so that the flexible optical fiber ribbon is more suitable for the random bending receiving mode of the flexible optical fiber ribbon in the optical cable. Particularly, when the high-density optical cable is manufactured, the probability of band scattering is reduced, and the consistency among batches is obviously improved.
Description
Technical Field
The invention belongs to the field of optical communication, and particularly relates to a flexible optical fiber ribbon, a high-density optical cable and application of cured resin.
Background
With the advent of the 5G era and the explosive growth of data, massive data needs to be realized in a dense networking mode. Under the background of intensive and dense networking of data centers, machine rooms and the like, the demand for optical cables with large core number and ultrahigh density is generated. Conventional large core cables include rigid fiber ribbon cables (e.g., skeletal cables and layer stranded cables) and loose-ribbon type layer stranded cables. The rigid optical fiber ribbon cable has the characteristic of being capable of being welded in the whole ribbon, and the welding construction efficiency is high. However, the conventional optical fiber ribbon cable cannot bear bending stress due to the rigid structure of the optical fiber ribbon. The attenuation of the side fiber of the optical fiber ribbon can obviously rise when the optical fiber ribbon is stressed, and a large space allowance needs to be reserved when the optical cable is designed. The density of such cabled fibers cannot be made very high and the bending performance is compromised. The optical cable in a loose ribbon form can achieve relatively high optical fiber density, but needs to be welded one by one during welding, so that the welding efficiency is greatly reduced.
In order to increase the density of optical fibers and reduce the attenuation of side fibers, flexible optical fiber ribbons with intermittent connection among the optical fibers are developed, so that the density of the optical fibers in the optical cable is increased, and the whole ribbon fusion characteristic of the optical fiber ribbons is maintained. However, the quality of the flexible optical fiber ribbon is difficult to maintain stably, the consistency between batches is poor, the ribbon scattering phenomenon occurs, especially in a high-density optical cable structure, the problems of degumming and ribbon scattering often occur, the welding efficiency is finally reduced, and the whole ribbon welding cannot be performed according to the optical fiber ribbon mode as expected.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a flexible optical fiber ribbon, a high-density optical cable and cured resin application, and aims to adapt to the design of an optical cable which is folded and accommodated in the optical cable with random probability between adjacent optical fibers of the flexible optical fiber ribbon by respectively arranging intermittent connecting parts on two arranged surfaces of the optical fibers, and reduce accidental loose bands caused by concentrated distribution of the intermittent connecting parts on one surface, so that the technical problem that batch consistency of the loose bands is not high due to difficulty in bearing tensile stress or compressive stress in processes such as stranding and the like when the conventional flexible optical fiber ribbon is used for manufacturing the optical cable in the subsequent process is solved.
To achieve the above object, according to one aspect of the present invention, there is provided a flexible optical fiber ribbon comprising 3 or more single-core optical fibers arranged side by side on the same plane to form an optical fiber arrangement; two sides of the optical fiber array are respectively provided with intermittent connecting parts which are not axially connected; the intermittent connecting part is used for flexibly connecting two adjacent single-core optical fibers; the intermittent connecting parts are distributed in a staggered mode, so that any one non-edge fiber is respectively connected with the left adjacent fiber and the right adjacent fiber at different axial positions.
Preferably, the two surfaces of the optical fiber arrangement of the flexible optical fiber ribbon are respectively provided with intermittent connecting parts which are uniformly distributed and have the same number.
Preferably, the flexible optical fiber ribbon has an asymmetry of the intermittent connecting portions with respect to a symmetry axis of an optical fiber arrangement direction, and preferably the intermittent connecting portions do not exceed the symmetry axis of the optical fiber arrangement direction.
Preferably, the flexible optical fiber ribbon has a surface of the intermittent connection portion away from the axis of symmetry in the optical fiber arrangement direction recessed toward the axis of symmetry in the optical fiber arrangement direction; the amplitude of the recess is above 10 um. The range of the recess of the intermittent connection part is the distance from the lowest recess to the surface of the optical fiber arrangement on the same side of the intermittent connection part.
Preferably, the flexible optical fiber ribbon has adjacent single-core optical fibers connected by the intermittent connection portion close to each other, so that the intermittent connection portion forms a Y shape; preferably, the intermittent connecting portion covers a width of at least half of the optical fiber in the optical fiber arrangement direction; preferably, the length of the intermittent connecting part is 5-20 mm, and each meter of the intermittent connecting part between adjacent single-core optical fibers comprises more than 10 intermittent connecting parts.
Preferably, the flexible optical fiber ribbon has the intermittent connecting portions arranged periodically at the same pitch on both surfaces of the optical fiber arrangement, the intermittent connecting portions distributed between different optical fibers on the same surface are arranged side by side at the same phase, and the intermittent connecting portions on different surfaces of the same pair of adjacent optical fibers are arranged at equal intervals; the period pitch is 20-200 mm, and the period pitch is the sum of the length of one intermittent connecting part and the length of a non-connecting part between axially adjacent intermittent connecting parts.
Preferably, the intermittent connecting portions of the flexible optical fiber ribbon are arranged periodically at the same pitch on two surfaces of the optical fiber arrangement, the series of adjacent axial intermittent connecting portions distributed between different optical fibers on the same surface are staggered according to a preset phase difference, and the intermittent connecting portions on different surfaces of the same pair of adjacent optical fibers are arranged at equal intervals; the period pitch is 20-200 mm, and the period pitch is the sum of the length of one intermittent connecting part and the length of a non-connecting part between axially adjacent intermittent connecting parts.
Preferably, the intermittent connection portion of the flexible optical fiber ribbon is formed by a cured resin adhesive, and the viscosity of the cured resin adhesive before curing is 500 to 10000Pa · s at a temperature range of 25 to 50 ℃, and more preferably 500 to 2000Pa · s at 50 ℃.
Preferably, the young's modulus of the flexible optical fiber ribbon after the cured resin binder is formally cured is between 1000 and 2000MPa, preferably between 1000 and 1500 MPa.
Preferably, the cured resin binder of the flexible optical fiber ribbon is formally cured to have an elongation at break of 25% to 300%, preferably 150% to 200%.
According to another aspect of the present invention, there is provided a high density optical cable comprising the flexible optical fiber ribbon as a core, the optical fiber density being 2.44f/mm or more2。
Preferably, the high-density optical cable has the flexible optical fiber ribbons stranded with each other.
According to another aspect of the present invention, there is provided a use of a cured resin binder for manufacturing the flexible optical fiber ribbon provided by the present invention, wherein the viscosity of the cured resin binder before curing is in a temperature range of 25 ℃ to 50 ℃ of 500 to 10000Pa · s, and more preferably in a temperature range of 500 to 2000Pa · s at 50 ℃; the cured resin binder has a Young's modulus of 1000-2000 MPa, preferably 1000-1500 MPa after formal curing; the elongation at break of the cured resin binder after formal curing is 25 to 300%, preferably 150 to 200%.
Preferably, said application, wherein said cured resin binder is a UV cured resin.
Preferably, the UV curing resin comprises 25-70 parts by mass of oligomer, 30-75 parts by mass of reactive monomer diluent, 1-10 parts by mass of photoinitiator and 1-10 parts by mass of auxiliary agent; the auxiliary agent comprises a silane coupling agent;
the UV curing resin contains 0.5-5 wt% of silane coupling agent.
Preferably, said use, wherein said oligomer is a composition comprising a urethane acrylate and an epoxy acrylate; wherein the urethane acrylate, preferably aliphatic urethane acrylate and/or aromatic urethane acrylate, more preferably a combination of one or more selected from the group consisting of CN8000 series, CN9000 series, CN981B88, CN985B88 of SARTOMER corporation; the epoxy acrylate is selected from one or more of CN104 series epoxy acrylate of SARTOMER company, 621A epoxy acrylate of Changxing company, 6219-100 epoxy methacrylate and 6105 epoxy acrylate of Jiangsu Sanmu company.
Preferably, the application, wherein the reactive monomer diluent is a monofunctional reactive diluent and/or a multifunctional reactive diluent; the functional group reactive diluent is preferably beta-hydroxyethyl methacrylate; the multifunctional reactive diluent is preferably selected from the group consisting of 1, 6-hexanediol diacrylate, isobornyl acrylate, trimethylolpropane formal acrylate, neopentyl glycol diacrylate, 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, tricyclodecane dimethanol diacrylate, and combinations of one or more thereof.
Preferably, said use, wherein said silane coupling agent is an organosilicon compound of silane structure selected from the group consisting of α - [ 3- (2 '-hydroxyethoxy) propyl ] - ω -trimethylsiloxypolydimethylsiloxane, α - [ 3- (2' -hydroxyethoxy) propyl ] - ω -trimethylsiloxypolydiphenylsiloxane, α - [ 3- (2 ', 3' -dihydroxypropoxy) propyl ] - ω -trimethylsiloxypolydimethylsiloxane, α - [ 3- (2 ', 3' -dihydroxypropoxy) propyl ] - ω -trimethylsiloxypolydiphenylsiloxane, α - [ 3- (2 '-ethyl-2' -hydroxymethyl-3-hydroxy) propyl ] - ω -trimethylsiloxypolydimethylsiloxane, α - [ 3- (2 '-ethyl-2' -hydroxymethyl-3-hydroxy) propyl ] - ω -trimethylsiloxypolydiphenylsiloxane, Alpha- [ 3- (2 '-hydroxy-3' -isopropylamino) propyl ] -omega-trimethylsiloxypolydimethylsiloxane and alpha- [ 3- (2 '-hydroxy-3' -isopropylamino) propyl ] -omega-trimethylsiloxypolydiphenylsiloxane.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
the intermittent connecting parts of the flexible optical fiber ribbon provided by the invention are distributed on the two sides of the optical fiber arrangement, so that the flexible optical fiber ribbon is more suitable for the random bending receiving mode of the flexible optical fiber ribbon in the optical cable. Compared with asymmetric intermittent connecting parts concentrated on the same surface, the optical fiber is randomly bent in the arrangement direction and kept relatively constant in the axial direction, so that when the optical fiber is bent in the direction with higher degumming probability of the asymmetric intermittent connecting parts, a large amount of degumming is easy to occur in the axial direction, and the phenomenon of poor consistency between scattered bands and optical cable batches is caused. Particularly, when the high-density optical cable is manufactured, the probability of band scattering is reduced, and the consistency among batches is obviously improved.
According to the preferable scheme, the intermittent connecting parts are distributed on two sides of the flexible optical fiber ribbon as uniformly as possible, the probability of ribbon scattering can be further reduced no matter the distribution quantity or the distribution uniformity, and the consistency among batches is improved.
The optimal scheme is matched with an asymmetric design, and different bearing capacities of the intermittent connecting part on tensile stress and compressive stress are respectively improved, so that the degumming failure probability of the intermittent connecting part is reduced, and the tape scattering probability is reduced.
Drawings
FIG. 1 is a schematic diagram of a flexible optical fiber ribbon structure provided in example 1 of the present invention;
fig. 2 is a cross-sectional view of a flexible fiber optic ribbon as provided in example 1 of the present invention;
FIG. 3 is an enlarged view of an intermittent connector portion of a flexible fiber optic ribbon as provided in example 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of a high-density fiber optic cable including flexible fiber optic ribbons according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a flexible optical fiber ribbon structure provided in example 2 of the present invention;
fig. 6 is a cross-sectional view of a flexible fiber optic ribbon as provided in example 2 of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1 is non-edge fiber, 2 is front side (+ Z direction) intermittent connecting part, 3 is reverse side (-Z direction) intermittent connecting part, and 4 is edge fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The flexible optical fiber ribbon provided by the invention comprises more than 3 single-core optical fibers which are arranged side by side on the same plane to form optical fiber arrangement; two sides of the optical fiber array are respectively provided with intermittent connecting parts which are not axially connected; the intermittent connecting part is used for flexibly connecting two adjacent single-core optical fibers; the intermittent connecting parts are distributed in a staggered mode, so that any one non-edge fiber is respectively connected with the left adjacent fiber and the right adjacent fiber at different axial positions.
The intermittent connecting parts connect the optical fiber ribbons into a spider-web package, and because the intermittent connecting parts are distributed on two surfaces, when the optical fiber ribbons are twisted and mutually and tightly arranged to form the high-density optical cable, the optical fiber ribbons bear tensile stress or compressive stress randomly. Although the intermittent connection part may be broken due to a sufficiently large tensile stress or compressive stress, the intermittent connection part having the same shape may be broken due to different capabilities of the intermittent connection part in receiving the tensile stress or compressive stress, and particularly, the optical fiber connection part receiving the compressive stress is more likely to maintain the function when the intermittent connection part is housed in the same optical cable.
For the optical fiber ribbon, a part of intermittent connecting parts are less prone to fracture, after the optical fiber ribbon is manufactured, fracture failure of a few intermittent connecting parts does not affect the overall form of the overall flexible optical fiber ribbon in a ribbon fiber mode, and the overall ribbon fiber fusion characteristic is still kept under the condition of higher optical fiber density. Therefore, the probability of breakage of the intermittent connecting parts is reduced, more intermittent connecting parts are enabled to maintain the connecting function in the processes of manufacturing, using and stripping the optical cable, the optical fiber density of the optical cable manufactured by the flexible optical fiber ribbon can be further improved, the usability is improved, and the inconvenience in use caused by loose ribbons is reduced.
In order to further reduce the breakage probability of the intermittent connecting parts, the intermittent connecting parts are uniformly distributed on two sides of the optical fiber arrangement on one side in the overall distribution, so that the problem that the optical cable quality cannot be guaranteed and the batch consistency is poor due to the fact that the optical fiber connecting parts with more optical fiber ribbons are broken due to random distribution and the welding performance of the whole optical fiber ribbon is influenced accidentally with a certain probability is solved; on the other hand, in the shape design of the optical fiber connecting part, an asymmetric design is adopted, so that the probability of the function of the optical fiber when the optical fiber bears the compressive stress is improved, the number of the intermittent connecting parts which can integrally maintain the function is improved, and the optical fiber ribbon consisting of the optical fibers arranged side by side is maintained. Therefore, in a preferred embodiment, the two surfaces of the optical fiber array are respectively provided with intermittent connecting parts which are uniformly distributed and have a corresponding number, and the intermittent connecting parts have asymmetry relative to the symmetry axis of the optical fiber array direction.
The flexible optical fiber ribbons are tightly arranged in the optical cable to form a cable core of the high-density optical cable, and the intermittent connecting parts are used as outer sides for description, and when the intermittent connecting parts do not exceed a symmetrical axis of the arrangement direction of the optical fibers and adjacent optical fibers are folded towards the outside, the intermittent connecting parts bear compressive stress more simply; when adjacent optical fibers are folded inwardly, the intermittent connecting portion simply bears tensile stress. When the intermittent connecting part exceeds the symmetry axis, no matter the adjacent optical fibers are folded towards the outside or towards the inside, although the magnitude and the acting range of the tensile stress and the compressive stress are different due to the asymmetrical intermittent connecting part, the intermittent connecting part can bear certain tensile stress and certain compressive stress, so that the performance requirements on the intermittent connecting part are more complicated and difficult to meet. In order to further improve the density of the optical cable and reduce the failure probability of the intermittent connecting part, the intermittent connecting part does not exceed the symmetrical axis of the arrangement direction of the optical fibers, and therefore the requirements of simultaneously meeting the tensile stress and the compressive stress resistance are reduced.
Under the design of this kind of intermittent type connecting portion is not exceeded the symmetry axis of optic fibre array direction, optic fibre was outside folding, intermittent type nature connecting portion only born pressure stress, and the probability of coming off inefficacy is less, in order to improve the bearing capacity of pressure stress, adopts intermittent type nature connecting portion to keep away from the one side of the symmetry axis of optic fibre array direction the sunken design of symmetry axis of optic fibre array direction reduces because the optic fibre is folding the pressure stress that produces outwards, when keeping sunken range more than 10um, can maintain the pliability of intermittent type nature connecting portion, and the effectual intermittent type nature connecting portion that prevents is lost efficacy because of pressure stress. The range of the recess of the intermittent connection part is the distance from the lowest recess to the surface of the optical fiber arrangement on the same side of the intermittent connection part. Such an intermittent connection portion may be formed by controlling the amount and fluidity of the adhesive when the flexible optical fiber connection portion is manufactured, by having the surface of the intermittent connection portion away from the axis of symmetry in the optical fiber arrangement direction recessed toward the axis of symmetry in the optical fiber arrangement direction.
On the basis, adjacent single-core optical fibers connected by the intermittent connecting part are close to each other, so that the intermittent connecting part forms a Y shape. Therefore, the intermittent connecting part which does not exceed the symmetry axis of the optical fiber arrangement direction is formed in the manufacturing process, and the optical fiber density of the manufactured optical cable is improved. When adjacent optic fibre inwards folded simultaneously, intermittent type nature connecting portion bear the tensile stress, in order to improve the bearing capacity of intermittent type nature connecting portion, intermittent type nature connecting portion cover optic fibre more than half width on optic fibre array direction to change the direction of tensile stress, reduce because the optic fibre intermittent type nature connecting portion that tensile stress leads to and become invalid.
Of course, in order to significantly improve the tensile stress and compressive stress resistance of the intermittent connection portion, it is an effective means to incorporate a material for forming the corresponding intermittent connection portion. When the intermittent connecting part is not more than the symmetry axis of the optical fiber arrangement direction, the intermittent connecting part simply bears tensile stress and compressive stress, and the intermittent connecting part failure caused by the compressive stress can be obviously reduced through proper shape design, so that the bearing capacity of the intermittent connecting part to the tensile stress is improved through curing materials, and the probability of the whole optical fiber ribbon and the high-density optical fiber ribbon scattering can be obviously reduced. Therefore, on the one hand, the stripping force between the intermittent connecting part and the optical fiber is enhanced by adding the silane coupling agent into the cured resin adhesive, on the other hand, the failure probability is reduced by the deformation of the intermittent connecting part by controlling the Young modulus of the cured resin adhesive after the main curing to be between 1000-2000 MPa, preferably between 1000-1500 MPa, and the failure of the intermittent connecting part caused by the tensile stress fracture of the cured resin adhesive is avoided by controlling the fracture elongation of the cured resin adhesive after the main curing to be between 25-300%, preferably between 150-200%. In the invention, because the intermittent linking part is asymmetrically designed, the requirement of matching a larger Young modulus and a larger breaking elongation rate to the tensile stress is mainly considered, and the preferred scheme is that two optical fibers connected by the intermittent connecting part are close to each other as much as possible, so that the tensile stress can be reduced, and the probability of ribbon scattering can be reduced. However, the young modulus of the UV curable resin is too high, on one hand, the elongation at break cannot be increased correspondingly, or even can be reduced, and on the other hand, experiments show that, under the structural design of the Y-shaped connecting part section of the invention, the too high young modulus can increase the falling probability, thereby increasing the tape scattering probability as a whole.
The design of the shape and physical property of the intermittent connecting part is matched, when the bonding length is more than 5mm, each meter between the adjacent single-core optical fibers comprises more than 10 intermittent connecting parts, even if the flexible optical fiber ribbons are mutually twisted, the optical fiber density is made to be 2.44f/mm2When the optical cable is used, the probability of occurrence of loose bands can still be guaranteed to be below 10%, and the usability of the optical fiber cored high-density optical cable is effectively guaranteed. The total length of the intermittent connection between adjacent single-core optical fibers is not more than 50% of the length of the optical fiber in consideration of flexibility of the optical fiber.
The curing resin binder for manufacturing the flexible optical fiber ribbon is preferably UV curing resin, and comprises an oligomer, a reactive monomer diluent, a photoinitiator and an auxiliary agent in order to meet the requirements;
the high-performance ultraviolet-curing light-sensitive adhesive comprises, by mass, 25-70 parts of oligomer, 30-75 parts of reactive monomer diluent, 1-10 parts of photoinitiator and 1-10 parts of auxiliary agent; the auxiliary agent comprises a silane coupling agent; the UV curing resin contains 0.5-5 wt% of silane coupling agent. The silane structure is preferably added to the resin material by means of crosslinking, or may be added to the resin in the form of an auxiliary, but may affect the final degree of cure and thus the long-term service life of the resin. The auxiliary agent also comprises a defoaming agent, a flatting agent, an antioxidant and the like.
The oligomer is a composition containing urethane acrylate and epoxy acrylate; wherein the urethane acrylate, preferably aliphatic urethane acrylate and/or aromatic urethane acrylate, more preferably a combination of one or more selected from the group consisting of CN8000 series, CN9000 series, CN981B88, CN985B88 of SARTOMER corporation; the epoxy acrylate is selected from one or more of CN104 series epoxy acrylate of SARTOMER company, 621A epoxy acrylate of Changxing company, 6219-100 epoxy methacrylate and 6105 epoxy acrylate of Jiangsu Sanmu company.
The reactive monomer diluent is a monofunctional reactive diluent and/or a polyfunctional reactive diluent; the functional group reactive diluent is preferably beta-hydroxyethyl methacrylate; the multifunctional reactive diluent is preferably selected from the group consisting of 1, 6-hexanediol diacrylate, isobornyl acrylate, trimethylolpropane formal acrylate, neopentyl glycol diacrylate, 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, tricyclodecane dimethanol diacrylate, and combinations of one or more thereof. The monomer containing more polyfunctional groups is adopted, so that the reactivity is increased, and a cross-linking structure can be endowed to the cured film.
The silane coupling agent is an organic silicon compound with a silane structure and is selected from alpha- [ 3- (2 '-hydroxyethoxy) propyl ] -omega-trimethylsiloxy polydimethylsiloxane, alpha- [ 3- (2' -hydroxyethoxy) propyl ] -omega-trimethylsiloxy polydiphenylsiloxane, alpha- [ 3- (2 ', 3' -dihydroxypropoxy) propyl ] -omega-trimethylsiloxy polydimethylsiloxane, alpha- [ 3- (2 ', 3' -dihydroxypropoxy) propyl ] -omega-trimethylsiloxy polydiphenylsiloxane, alpha- [ 3- (2 '-ethyl-2' -hydroxymethyl-3-hydroxy) propyl ] -omega-trimethylsiloxy polydimethylsiloxane, alpha- [ 3- (2 '-ethyl-2' -hydroxymethyl-3-hydroxy) propyl ] -omega-trimethylsiloxy polydiphenylsiloxane, Alpha- [ 3- (2 '-hydroxy-3' -isopropylamino) propyl ] -omega-trimethylsiloxypolydimethylsiloxane and alpha- [ 3- (2 '-hydroxy-3' -isopropylamino) propyl ] -omega-trimethylsiloxypolydiphenylsiloxane.
The following are examples:
example 1
The flexible optical fiber ribbon provided by the embodiment is not formed into a ribbon shape by a structure that the conventional optical fiber is completely coated with acrylic resin. The optical fibers are intermittently bonded by using an adhesive or acrylic resin and other materials, other parts of the optical fibers are not adhered to each other, the formed optical fiber ribbon is not of a rigid structure, and when lateral pressure is applied, the optical fiber ribbon can deform because the optical fibers have the unconnected parts.
As shown in fig. 1, 12 optical fiber ribbons are provided side by side on the same plane, taking 12 cores as an example. The diameter of the core part of the optical fiber is generally 125um, the cladding part is outside the core, the diameter after cladding is 240um, the cladding is provided with a coloring layer, and the diameter after coloring is about 250 um. 12 optical fibers are arranged in parallel, and intermittent connecting parts are arranged in the optical fibers. The remainder being non-connecting portions.
The intermittent connecting parts are arranged on two surfaces of the optical fiber array in a periodic mode according to the same pitch in the axial direction, the intermittent connecting parts distributed among different optical fibers on the same surface are arranged side by side according to the same phase, and the intermittent connecting parts on different surfaces of the same pair of adjacent optical fibers are arranged at equal intervals. The length of the optical fiber connecting part is L1=10mm, the width is 270um, the period pitch is the sum of the length of the connecting part and the length of the non-connecting part, the phase difference of the adjacent intermittent connecting parts is the period pitch is the sum of the length of one intermittent connecting part and the length of the non-connecting part between the axially adjacent intermittent connecting parts, and the period pitch P =70mm, namely the pitch of the single-side intermittent connecting part is 140 mm. The connecting points are synchronously arranged in the positive and negative directions, so that the working frequency of the connecting part can be reduced, and the manufacturing speed can be doubled.
The cross-sectional view of the connecting portion can be seen by cutting the ribbon along sections a-a and B-B, respectively, as shown in fig. 2: at A-A, the connectorized portion is present in the + Z direction of the ribbon plane and is absent in the-Z direction. At B-B, the linking moiety is present in the-Z direction and absent in the + Z direction. That is, the intermittent connecting part does not exceed the symmetry axis of the optical fiber arrangement direction, the enlarged view of the intermittent connecting part is shown in fig. 3, and one surface of the intermittent connecting part, which is far away from the symmetry axis of the optical fiber arrangement direction, is concave towards the symmetry axis of the optical fiber arrangement direction; its range of caving in of intermittent type nature connecting portion, it arrives promptly to cave in the lowest the distance d of the face that the optic fibre of intermittent type nature connecting portion homonymy was arranged is more than 20um, adjacent single core optic fibre that intermittent type nature connecting portion connected is close to each other, makes intermittent type nature connecting portion form the Y style of calligraphy.
The five formulations of resins are applied to the optical fiber ribbon by changing the distribution ratio, and the subsequent procedure is performed after cabling. The cross section of the optical cable is shown in fig. 4, the bundled optical fiber ribbon is placed in the inner cavity of the sheath of the optical cable in a stranding mode, the reinforcing element is embedded in the sheath, the diameter of the optical cable is 15.0mm, the number of optical fiber cores is 432, and the optical fiber density is 2.44f/mm2The test probability of banding is shown in the following table:
example 2
The flexible optical fiber ribbon provided by the embodiment is not formed into a ribbon shape by a structure that the conventional optical fiber is completely coated with acrylic resin. The optical fibers are intermittently bonded by using an adhesive or acrylic resin and other materials, other parts of the optical fibers are not adhered to each other, the formed optical fiber ribbon is not of a rigid structure, and when lateral pressure is applied, the optical fiber ribbon can deform because the optical fibers have the unconnected parts.
As shown in the above drawings, 12 optical fiber ribbons are provided side by side on the same plane, taking 12 core optical fiber ribbons as an example. The diameter of the core part of the optical fiber is generally 125um, the cladding part is outside the core, the diameter after cladding is 240um, the cladding is provided with a coloring layer, and the diameter after coloring is about 250 um. 12 optical fibers are arranged in parallel, and intermittent connecting parts are arranged in the optical fibers. The remainder being non-connecting portions.
The intermittent connecting parts are arranged on two surfaces of the optical fiber array in a periodic mode according to the same pitch in the axial direction, adjacent axial intermittent connecting part series distributed among different optical fibers on the same surface are arranged in a staggered mode according to a preset phase difference, and the intermittent connecting parts on the same pair of adjacent optical fibers on different surfaces are arranged at equal intervals. The fiber joint length is L1=10mm, the width is 270um, the period pitch is the sum of the length of one intermittent joint and the length of the non-joint part between axially adjacent intermittent joints, L3=90mm, and the phase difference is L2=30 mm. The connecting points are synchronously arranged in the positive and negative directions, so that the working frequency of the connecting part can be reduced, and the manufacturing speed can be doubled.
A cross-sectional view of the connecting portion can be seen by cutting the ribbon along sections a-a and B-B, respectively, as shown in fig. 6:
at A-A, the connectorized portion is present in the + Z direction of the ribbon plane and is absent in the-Z direction. At B-B, the linking moiety is present in the-Z direction and absent in the + Z direction. The intermittent connecting part does not exceed the symmetrical axis of the optical fiber arrangement direction, and one surface of the intermittent connecting part, which is far away from the symmetrical axis of the optical fiber arrangement direction, is sunken towards the symmetrical axis of the optical fiber arrangement direction; its range of caving in of intermittent type nature connecting portion, it arrives promptly to cave in the lowest the distance d of the face that the optic fibre of intermittent type nature connecting portion homonymy was arranged is more than 10um, the adjacent single core optic fibre that intermittent type nature connecting portion connected is close to each other, makes intermittent type nature connecting portion form the Y style of calligraphy.
The five formulations of resins are applied to the optical fiber ribbon by changing the distribution ratio, and the subsequent procedure is performed after cabling. The cross section of the optical cable is shown in FIG. 4, the diameter is 15.0mm, the number of optical fiber cores is 432, and the optical fiber density is 2.44f/mm2The test probability of banding is shown in the following table:
it will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (15)
1. A flexible optical fiber ribbon is characterized by comprising more than 3 single-core optical fibers which are arranged side by side on the same plane to form optical fiber arrangement; two sides of the optical fiber array are respectively provided with intermittent connecting parts which are not axially connected; the intermittent connecting part is used for flexibly connecting two adjacent single-core optical fibers; the intermittent connecting parts are distributed in a staggered manner, so that any one non-edge fiber is respectively connected with the left adjacent fiber and the right adjacent fiber at different axial positions; the two sides of the optical fiber array are respectively provided with intermittent connecting parts which are uniformly distributed and have the same number; the intermittent connection part has asymmetry about a symmetry axis of an arrangement direction of the optical fibers; the intermittent connecting part is not more than the symmetry axis of the optical fiber arrangement direction, and one surface of the intermittent connecting part, which is far away from the symmetry axis of the optical fiber arrangement direction, is sunken towards the symmetry axis of the optical fiber arrangement direction.
2. The flexible optical fiber ribbon of claim 1, wherein the depressions have an amplitude of greater than 10 um.
3. The flexible optical fiber ribbon of claim 2, wherein adjacent single core optical fibers connected by said intermittent connection portions are positioned close to each other so that said intermittent connection portions form a Y-shape.
4. The flexible optical fiber ribbon of any one of claims 1 to 3, wherein the intermittent connection portions cover more than half of the width of the optical fibers in the optical fiber arrangement direction.
5. The flexible optical fiber ribbon as claimed in any one of claims 1 to 3, wherein said intermittent connecting portions have a length of 5 to 20mm and comprise more than 10 said intermittent connecting portions per meter between adjacent single-core optical fibers.
6. The flexible optical fiber ribbon of claim 1, wherein said intermittent connections are periodically arranged on both sides of the arrangement of optical fibers at the same pitch axially, the intermittent connections distributed between different optical fibers on the same side being arranged side by side at the same phase, the intermittent connections on different sides of the same pair of adjacent optical fibers being arranged at equal intervals; the period pitch is 20-200 mm, and the period pitch is the sum of the length of one intermittent connecting part and the length of a non-connecting part between axially adjacent intermittent connecting parts.
7. The flexible optical fiber ribbon of claim 1, wherein the intermittent connections are periodically arranged on both sides of the array of optical fibers at the same pitch axially, respectively, and wherein the series of adjacent axial intermittent connections distributed between different optical fibers on the same side are staggered by a predetermined phase difference, and the intermittent connections on different sides of the same pair of adjacent optical fibers are equidistantly spaced; the period pitch is 20-200 mm, and the period pitch is the sum of the length of one intermittent connecting part and the length of a non-connecting part between axially adjacent intermittent connecting parts.
8. The flexible optical fiber ribbon as claimed in claim 1, wherein the intermittent connection portions are formed of a cured resin adhesive having a viscosity before curing in a temperature range of 25 ℃ to 50 ℃ of 500 to 10000 Pa-s.
9. The flexible optical fiber ribbon of claim 8, wherein the cured resin adhesive has a young's modulus of between 1000 MPa and 2000MPa after formal curing.
10. The flexible optical fiber ribbon of claim 8, wherein the cured resin adhesive has an elongation at break of between 25% and 300% after formal curing.
11. A high-density optical fiber cable comprising the flexible optical fiber ribbon as claimed in any one of claims 1 to 10 as a core, and having an optical fiber density of 2.44f/mm or more2。
12. The high-density fiber optic cable of claim 11, wherein said flexible fiber optic ribbons are stranded about one another.
13. The application of the cured resin adhesive is characterized in that the cured resin adhesive is applied to manufacturing the flexible optical fiber ribbon as claimed in any one of claims 1 to 10, and the Young modulus of the cured resin adhesive after formal curing is 1000-2000 MPa; the elongation at break of the cured resin binder after formal curing is between 25 and 300 percent.
14. Use of a cured resinous binder as claimed in claim 13 in which the viscosity of the cured resinous binder before curing is in the range of 500 to 10000 Pa-s at a temperature of 25 ℃ to 50 ℃.
15. The use of the cured resin binder of claim 14 wherein the cured resin comprises 0.5wt% to 5wt% of the silane coupling agent.
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| CN202111559018.1A CN113946025B (en) | 2021-12-20 | 2021-12-20 | Flexible optical fiber ribbon, high-density optical cable and application of curing resin |
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| CN202111559018.1A CN113946025B (en) | 2021-12-20 | 2021-12-20 | Flexible optical fiber ribbon, high-density optical cable and application of curing resin |
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| CN113946025B true CN113946025B (en) | 2022-03-22 |
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| JP2016075746A (en) * | 2014-10-03 | 2016-05-12 | 住友電気工業株式会社 | Intermittent type optical fiber tape core wire and manufacturing method thereof |
| JP6569429B2 (en) * | 2015-09-25 | 2019-09-04 | 住友電気工業株式会社 | Optical fiber ribbon |
| JP6144371B1 (en) * | 2016-01-14 | 2017-06-07 | 株式会社フジクラ | Intermittently connected optical fiber tape inspection method, inspection apparatus, and manufacturing method |
| CN108474921A (en) * | 2016-02-23 | 2018-08-31 | 住友电气工业株式会社 | Manufacturing method, optical cable and the optical fiber cord of discontinuity connection type optical fiber core, discontinuity connection type optical fiber core |
| KR102534060B1 (en) * | 2016-07-27 | 2023-05-19 | 프리즈미안 에스피에이 | flexible fiber optic ribbon |
| JP6453970B1 (en) * | 2017-10-05 | 2019-01-16 | 株式会社フジクラ | Intermittently connected optical fiber tape and method for manufacturing intermittently connected optical fiber tape |
| EP3923052A4 (en) * | 2019-02-06 | 2022-03-16 | Sumitomo Electric Industries, Ltd. | Intermittent connection-type optical fiber tape core wire, optical fiber cable, and method for manufacturing intermittent connection-type optical fiber tape core wire |
| EP3978976A4 (en) * | 2019-05-28 | 2022-07-27 | Sumitomo Electric Industries, Ltd. | Optical fiber tape core wire, optical fiber cable, and method of manufacturing optical fiber tape core wire |
| CN111175887A (en) * | 2020-02-13 | 2020-05-19 | 江苏亨通光电股份有限公司 | Optical fiber ribbon, optical cable, and method for manufacturing optical fiber ribbon |
| CN113359230B (en) * | 2021-05-18 | 2022-04-29 | 烽火通信科技股份有限公司 | Flexible optical fiber ribbon and optical cable |
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