WO2004074898A1 - 被覆光ファイバ心線及びコネクタ付被覆光ファイバ心線 - Google Patents
被覆光ファイバ心線及びコネクタ付被覆光ファイバ心線 Download PDFInfo
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- WO2004074898A1 WO2004074898A1 PCT/JP2004/001888 JP2004001888W WO2004074898A1 WO 2004074898 A1 WO2004074898 A1 WO 2004074898A1 JP 2004001888 W JP2004001888 W JP 2004001888W WO 2004074898 A1 WO2004074898 A1 WO 2004074898A1
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- Prior art keywords
- optical fiber
- resin
- coated optical
- layer
- coating layer
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/1065—Multiple coatings
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
-
- 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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
Definitions
- the present invention relates to a coated optical fiber core and a coated optical fiber core with a connector. Background technology>
- the outside of a glass fiber mainly composed of quartz glass with an outer diameter of 125 ⁇ is used as a primary coating layer, and a thermosetting silicone resin coating is coated so as to have an outer diameter of 400 ⁇ .
- a coated optical fiber core coated with a polyamide-based thermoplastic resin as a secondary coating layer on the outer periphery is used for optical cords and the like (conventional example 1: see Patent Document 1).
- the optical cord usually has a form in which a tensile strength wire is arranged outside the optical fiber core wire and a sheath layer made of chloride chloride or the like is provided, and is used for wiring of an optical communication device or the like.
- a flame-retardant conductor cable that does not generate harmful gas
- an unshielded pair consisting of a twisted pair of twisted insulated cores with conductors insulated by an insulator, and bundling these twisted pairs to form a sheath.
- Type cables are known.
- a flame retardant is added to at least the outer surface and the collective sheath of the insulator.
- the flame retardant include a phosphorus compound, a hydrated metal compound, and a metal oxide compound (Conventional Example 2: see Patent Document 2).
- Patent Document 1 Japanese Patent Application Laid-Open No. 62-99708
- Patent Document 2 Japanese Patent Application Laid-Open No. H08-1388454
- the load on the environment is small and the flame resistance is high.
- a coated optical fiber core having a property is not obtained.
- the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a coated optical fiber core wire having a low environmental load, high flame retardancy, and excellent optical transmission characteristics. It is to provide.
- the coated optical fiber according to the present invention is a coated optical fiber obtained by providing a secondary coating layer on the outer peripheral surface of an optical fiber obtained by providing a primary coating layer on the outer peripheral surface of a glass fiber.
- the second resin composition constituting the secondary coating layer comprises: a base resin; 100 to 250 parts by weight of a metal hydroxide based on 100 parts by weight of the base resin; and 10 to 100 parts by weight of nitrogen.
- a second flame retardant, and the second resin composition does not contain a halogen.
- the base resin is composed of an amorphous resin.
- the second resin composition comprises, as the base resin, a polystyrene-based resin alone, a polystyrene-based elastomer alone, a mixture of a polystyrene-based resin and polyphenylene ether, and a polystyrene-based elastomer and a polyphenylene-based resin.
- a mixture with diene ether is preferably, butanol.
- a part of the polystyrene-based resin or the polystyrene-based elastomer is acid-modified.
- the secondary coating layer is formed from two or more coating layers. More preferably, the transmission loss variation (dB / km) defined below is configured to be 0.2 dBZ km or less.
- Transmission loss change (dB / km): The amount of transmission loss (wavelength: 1.55) during the heat cycle exposure test, which is repeated between 40 ° C (0.5 hours hold) and 85 ° C (0.5 hours hold) ⁇ , unit: dB / km, including the transmission loss immediately after the start of the test.)
- the linear expansion coefficient of the second resin composition is 4. OX l O—l / K) It is as follows.
- the processing strain defined below is 150 / xm or less.
- Processing strain Distance between the tip face of the glass fiber and the tip face of the secondary coating layer in a coated optical fiber core that has been subjected to heat treatment at 120 ° C for 168 hours.
- the primary coating layer is a UV-curable resin layer, and cut from the secondary coating layer in the direction of the glass fiber so that the apex of the cut does not reach the glass fiber.
- the length of the ultraviolet-curable resin layer in the separated coating removal piece Z length of the separated secondary coating layer Is between 15% and 85%.
- an inner layer and an outer layer are sequentially provided as the secondary coating layer in a direction away from the optical fiber core, and the inner layer is a polystyrene-based thermoplastic resin.
- a polystyrene-based thermoplastic resin 100 to 250 parts by weight of a metal hydroxide, and less than 100 parts by weight, based on 100 parts by weight of resin, polyolefin-based thermoplastic resin or polyolefin ether, or a resin mixture thereof. It contains a nitrogen-based flame retardant.
- an inner layer and an outer layer are sequentially provided on the outer peripheral surface of the optical fiber core in a direction away from the optical fiber core as the secondary coating layer, and the outer layer is a polystyrene-based thermoplastic resin. 100 to 250 parts by weight of metal hydroxide and 100 to less than 100 parts by weight per 100 parts by weight of resin, polyolefin-based thermoplastic resin or polyolefin ether, or a mixed resin thereof And a nitrogen-based flame retardant.
- the coated optical fiber with connector according to the present invention includes a coated optical fiber according to the present invention having a glass fiber exposed portion and a coated end surface by exposing the glass fiber from a terminal at a predetermined length.
- the glass fiber exposed part can be accommodated
- FIG. 1 is a schematic sectional view of a coated optical fiber core according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating the production of the coated optical fiber core according to the embodiment of the present invention.
- -FIG. 3 (A) is a schematic cross-sectional view of a coated optical fiber according to an embodiment of the present invention, and (B) is a schematic cross-sectional view of an optical fiber according to an embodiment of the present invention.
- FIG. 4 is a diagram for explaining the production of the coated optical fiber according to the embodiment of the present invention.
- FIG. 6 is a diagram for explaining the manufacture of the coated optical fiber with connector according to the embodiment of the present invention.
- FIGS. 7 (A) and 7 (B) are views showing a coating removing tool used for removing the coating of the coated optical fiber.
- FIG. 8 is a diagram for explaining a method of a flame retardancy test on a coated optical fiber core of the example.
- 10 and 50 are coated optical fiber cores
- 11, 51 are glass fibers
- 12, 52 are primary coating layers
- 13, 53 are optical fiber cores
- 54 is an inner layer
- 55 is an outer layer.
- Part layers, 16 and 56 are secondary coating layers
- 56A is a coated end face
- 17 is a ferrule
- 17A is hollow
- 17B is a ferrule abutting end face
- 17C is an open ferrule end face
- 18 is a connector
- 19 is a coated light with a connector.
- a coated optical fiber core 10 As shown in the schematic cross-sectional view of FIG. 1, a coated optical fiber core 10 according to an embodiment of the present invention has an outer peripheral surface of an optical fiber core 13 having a primary coating layer 12 provided on the outer peripheral surface of a glass fiber 11. Further, a secondary coating layer 16 is provided.
- the secondary coating layer 16 is composed of a second resin composition.
- the second resin composition does not contain a halogen. This means that the second resin composition does not contain a compound having a halogen group.
- the base resin of the second resin composition (hereinafter, referred to as the second resin) is a resin having no halogen. As a result, it has the characteristic of not generating toxic gas during combustion.
- the second resin is preferably an amorphous resin, whereby the coated optical fiber core wire 10 having more excellent light transmission characteristics can be obtained.
- the second resin is a crystalline resin
- the orientation of the material itself becomes high, and particularly when the resin is extruded toward an optical fiber core moving at high speed to produce a coated optical fiber core,
- the second resin tends to give processing distortion to the glass fiber at the time of manufacturing, and tends to have poor optical transmission characteristics.
- another step such as annealing of the optical fiber is required after the second resin is extruded.
- the second resin composition includes, as a second resin, a polystyrene resin alone, a polystyrene elastomer alone, a mixture of a polystyrene resin and polyphenylene ether, or a mixture of a polystyrene elastomer and polyphenylene ether, It is preferable to contain any one of these.
- the second resin composition preferably contains a polystyrene-based thermoplastic resin as the second resin, whereby the heat resistance can be improved, and the adhesiveness to the epoxy adhesive used for connecting the connector can be improved. Becomes better.
- polystyrene-based thermoplastic resin examples include impact-resistant polystyrene (HIPS) in which a rubber component such as styrene-butadiene rubber is finely dispersed in polystyrene as a domain.
- HIPS impact-resistant polystyrene
- coated optical fibers with excellent optical transmission characteristics can be used. Can be obtained reliably.
- the second resin composition preferably contains a polystyrene-based elastomer and polyphenylene ether as the second resin, whereby heat resistance and flame retardancy can be particularly improved.
- the polystyrene-based elastomer is a block copolymer having a hard segment of polystyrene and a soft segment of diene polymer polyethylene propylene rubber such as polybutadiene, hydrogenated polybutadiene, and polyisoprene.
- the soft segment is polybutadiene.
- Styrene butadiene styrene block copolymer SBS
- styrene isoprene styrene block copolymer SIS
- SEBS styrene ethylene butylene styrene block copolymer
- SEPS styrene-ethylene-propylene-styrene block copolymer
- SEBC styrene ethylene butylene olefin crystal copolymer
- SEBC styrene ethylene butylene olefin crystal copolymer
- the weight ratio of the polystyrene-based elastomer to the polyphenylene ether is usually preferably from 8: 2 to 2: 8.
- a part of the polystyrene resin or a part of the polystyrene elastomer may be acid-modified.
- acid-modified means that a part of the molecular skeleton of polystyrene in the polystyrene-based resin or the polystyrene-based elastomer is treated with an organic acid such as maleic acid.
- the second resin is only polyphenylene ether as in Conventional Example 1, the resin cannot be extruded due to an increase in the extrusion pressure, and the appearance of the coated optical fiber core becomes poor, In addition, the resistance to temperature change (the characteristic that maintains the optical transmission characteristics at a high level even when the temperature fluctuates) is poor, and the processing distortion tends to increase.
- the second resin composition contains the second resin and 100 to 250 parts by weight of a metal hydroxide based on 100 parts by weight of the second resin.
- a metal hydroxide Magnesium hydroxide, aluminum hydroxide and the like can be preferably exemplified.
- the amount of the metal hydroxide is 100 parts by weight or more with respect to 100 parts by weight of the second resin, flame retardancy can be enhanced, and the amount of the metal hydroxide can be 100 parts by weight of the second resin.
- the amount is not more than 250 parts by weight, the extrudability of the second resin composition can be ensured, and the appearance can be improved without any problem.
- the second resin composition contains the second resin and 100 to 100 parts by weight of a nitrogen-based flame retardant based on 100 parts by weight of the second resin.
- the nitrogen-based flame retardant is not particularly limited as long as it does not have a halogen group, and examples thereof include melamine cyanurate, a melamine derivative, and tris (/ 3-cyanoethyl) isocyanurate.
- melamine cyanurate a melamine derivative
- tris (/ 3-cyanoethyl) isocyanurate By adopting such a nitrogen-based flame retardant, it is possible to obtain a coated fiber core having high flame retardancy and to suppress the generation of harmful gases such as hydrogen chloride gas and polyphosphoric acid during combustion. Therefore, it is possible to use a V-coated optical fiber core wire that has a small load on the environment.
- the amount of the nitrogen-based flame retardant is less than 100 parts by weight with respect to 100 parts by weight of the second resin, the flame retardancy will not be sufficiently exhibited, while if it exceeds 100 parts by weight, the coated optical fiber core will be used. Poor appearance occurs on the surface.
- the secondary coating layer is formed of a second resin.
- the metal hydroxide is added in an amount of 100 to 250 parts by weight, and the nitrogen-based flame retardant is added in an amount of 100 to 100 parts by weight, based on 100 parts by weight. According to such a configuration, high flame retardancy can be exhibited because a metal hydroxide that exhibits endothermicity during combustion is added and a nitrogen-based flame retardant that has a combustion suppressing effect is added.
- metal hydroxide that exhibits endothermicity during combustion is added and a nitrogen-based flame retardant that has a combustion suppressing effect is added.
- the resin composition is extruded and coated on the optical fiber at the time of manufacturing the coated optical fiber. Can be performed well.
- the Young's modulus of the secondary coating layer 16 at 25 ° C. is preferably 10 OMPa to 80 OMPa.
- the Young's modulus refers to the Young's modulus measured using a No. 2 type test piece according to JIS K7113.
- the Young's modulus of the secondary coating layer 16 depends on the type of the second resin constituting the second resin composition and its Young's modulus. By adjusting the content of, the type and content of the nitrogen-based flame retardant, and the type and content of the following additives, the content is preferably within the above range.
- the second resin composition may contain additives such as a light stabilizer (HALS), an antioxidant (such as a sulfur-based antioxidant), a lubricant, and an antioxidant, as necessary.
- a light stabilizer HALS
- an antioxidant such as a sulfur-based antioxidant
- a lubricant such as a lubricant
- an antioxidant such as a sulfur-based antioxidant
- an antioxidant such as a sulfur-based antioxidant
- an antioxidant such as a sulfur-based antioxidant
- the Young's modulus of the secondary coating layer ie is within the above-described range by adding a compounding agent such as a known plasticizer, softening agent, rubber softening agent, process oil, eta stain oil, or a crosslinking agent as an additive. May be adjusted.
- a compounding agent such as a known plasticizer, softening agent, rubber softening agent, process oil, eta stain oil, or a crosslinking agent. May be adjusted.
- the rubber softener include paraffin-based oils and non-aromatic rubber-softeners.
- the second resin composition is preferably obtained by mixing the respective constituent components, and can be mixed using a known melt mixing apparatus such as a Banbury mixer, a pressurized kneader, or a twin-screw mixer according to the embodiment of the present invention.
- the optical fiber core 13 used for the coated optical fiber core 10 is preferably formed by providing an ultraviolet curable resin layer as a primary coating layer 12 on the outer peripheral surface of a glass fiber 11. More specifically, an optical fiber core having an outer diameter (D) of 0.240 mm to 0.26 O mm obtained by coating a glass fiber 11 having an outer diameter of 0.125 mm with an ultraviolet-curable resin layer is used. This can be suitably exemplified.
- the glass fiber 11 is mainly composed of quartz glass, and as the resin of the ultraviolet-curable resin layer 12, urethane acrylate resin is widely known, and these can be used without limitation.
- the UV-curable resin layer 12 includes an inner layer (first UV-curable resin layer) and an outer layer (second UV-curable resin layer) having different physical properties (two-layer structure), Those having a coloring layer as the outermost layer are also known, and these can be used without limitation.
- the first UV-curable resin layer has a Young's modulus of 0.5 MPa to 2 MPa
- the modified resin layer preferably has a Young's modulus of 5 MPa to 150 OMPa
- the colored layer preferably has a Young's modulus of 500 MPa to 150 OMPa.
- the resin of the first ultraviolet-curable resin layer In order to express such a Young's modulus, in the production of the resin of the first ultraviolet-curable resin layer, it is obtained by reacting polyether diol, isophorone diisocyanate, and hydroxyshethyl acrylate. Urethane acrylate, N-vinylcaprolatatam, isopropyl acrylate, nonanediol acrylate, noenolephenol phthalate as a polymerizable unsaturated monomer, and lucirin TPO (manufactured by BASF) as a photopolymerization initiator.
- additives such as tetrakis ⁇ methylene-3- (3-5-di-t-butylinole-4-hydrodoxyfincinole) probionone ⁇ methane, mercaptoprovirtrimethoxysilane and 2,2,6 , 6-tetramethyl-1-piperidyl alcohol is mixed, and the mixture is irradiated with ultraviolet light to produce the mixture.
- the propylene acrylate and the polymer obtained by reacting toluene succinate and hydroxysethyl acrylate are obtained by reacting polypropylene acrylate glycol, toluene succinate and hydroxybenzene.
- N-Butyl Caprolactam Tricyclodecane dimethanol diatalylate as the unsaturated monomer
- Lucirin TPO manufactured by BASF
- Irgacure 1884 manufactured by Ciba Supharti Chemicals
- tetrakis ⁇ methylene-1- (3-5-g-t-butynole_4-hydrodroxyquif-nore) propionate ⁇ methane is mixed as another additive, and the mixture is irradiated with ultraviolet light to produce the mixture. preferable.
- the colored layer is also usually in the form of an ultraviolet curable resin layer.
- an epoxy resin obtained by reacting bisphenol A with 2-hydroxybutyl (meth) acrylate is used.
- Urethane acrylate obtained by reacting acrylate and / or propylene oxide glycol with tonorendi succinate and hydroxyxetino acrylate, and modified with bisphenol A ethylenoxide as a polymerizable unsaturated monomer
- Acrylates trimethylol pulp pantrioxyethyl (meth) acrylate, silicon acrylate, benzophenone, benzoin ether, and other additives as photopolymerizable initiators
- tetrakis ⁇ methylene-1-3- (3-5-di-tert-butyl-4-hydrocyclyl) propionate ⁇ methane is mixed, and the mixture is irradiated with ultraviolet rays to produce the compound.
- the side pressure applied to the optical fiber core 13 (the outer peripheral surface of the optical fiber core 13) is obtained.
- the second ultraviolet-curable resin layer absorbs the pressure, and
- the pressure is buffered by the first ultraviolet-curable resin layer, so that the glass fiber 11 receives the pressure.
- Optical transmission loss can be reduced.
- the coated optical fiber core wire 10 according to the embodiment of the present invention, the diameter (D s) up to the secondary coating layer 16 is 0.8 mm to 1.8 mm. A form of 0 mm can be preferably exemplified.
- the coated optical fiber core 10 according to the embodiment of the present invention is suitably manufactured by applying the second resin composition constituting the secondary coating layer 16 to the optical fiber core 13 as follows. You.
- the extruder 33 includes a housing section 33A in which the second resin composition is housed, and a cross-head that can apply the secondary coating layer 16 to the outer periphery of the optical fiber core 13 by extruding the second resin composition.
- De 33C The second resin composition is preferably applied to the outer periphery of the optical fiber core 13 in a molten state.
- the extruder 33 includes a heater (not shown) at a predetermined position.
- the extruded material from the extruder 33 is guided to a cooling water tank 34 and cooled to cure the outer coating 16 to form a coated optical fiber 10, which is wound on a take-up reel 36 through a tension controller 35. take.
- the secondary coating layer 16 may have a form of a single coating layer or a form of two or more coating layers.
- FIG. 3 (A) is a schematic cross-sectional view of a coated optical fiber core wire 50 in which the secondary coating layer is composed of two or more coating layers.
- the coated optical fiber core 50 has an outer periphery of an optical fiber core 53 in which a primary coating layer 52 is provided on the outer periphery of a glass fiber 51.
- a primary coating layer 52 is provided on the outer periphery of a glass fiber 51.
- an inner layer 54 and an outer layer 55 are sequentially provided in a direction away from the optical fiber core 53.
- the primary coating layer 52 includes a first UV-curable resin layer 52A and a second UV-curable resin layer 52B in a direction away from the glass fiber 51. And a coloring layer 52C.
- the resin compositions constituting the inner layer 54 and the outer layer 55 are combined to form a second resin composition.
- the second resin composition used for the secondary coating 56 is the same as the second resin composition used for the above-mentioned secondary coating layer 16 (FIG. 1) and the base resin (the resin constituting the inner layer and the outer layer).
- a metal hydroxide containing 100 to 250 parts by weight of a metal hydroxide and 100 to 100 parts by weight of a nitrogen-based flame retardant based on 100 parts by weight of a base resin, and does not contain halogen.
- Additives such as a light stabilizer (HALS), an antioxidant, a lubricant, and an antioxidant can be added to the second resin composition.
- the inner layer 54 is preferably made of a base resin of a polystyrene-based thermoplastic resin, a polyolefin-based thermoplastic resin, a polyphenylene ether, or a mixed resin thereof.
- the inner layer 54 is composed of 100 to 250 parts by weight of a metal hydroxide and less than 100 parts by weight of a nitrogen-based flame retardant with respect to 100 parts by weight of the base resin constituting the inner layer 54. Is preferably added.
- the outer layer 55 is made of a base resin made of a polystyrene-based thermoplastic resin, a polyolefin-based thermoplastic resin, a polyphenylene ether, or a mixed resin thereof. Is preferred.
- the outer layer 55 is prepared by adding 100 to 250 parts by weight of a metal hydroxide and less than 100 parts by weight of a nitrogen-based flame retardant to 100 parts by weight of the base resin constituting the outer layer 55.
- the Young's modulus of the inner layer 54 is 1 MPa to; L0 OMPa (more preferably, 5 MPa to 50 MPa), and the outer layer.
- the Young's modulus of the layer 55 is 20 OMPa to 150 OMPa (more preferably, 250 MPa to: 1 000 MPa), and the outer diameter (Dp) force to the inner layer 54 is 0.3 mm ⁇ . 0 ⁇ (more preferably, 0.35 ⁇ to 0.60 mm ⁇ ), and the outer diameter (D s) up to the outer layer 55 is 0.75 mm ⁇ to 1.0 mm ⁇ (more preferably, , 0.85m ⁇ ⁇ 0.95 ⁇ ).
- the Young's modulus of the inner layer 54 and the outer layer 55 is suitably adjusted by changing the types and amounts of the respective compounds constituting the inner layer 54 and the outer layer 55 described above.
- the inner layer 54 As described above, by forming the inner layer 54 as a flexible layer and the outer layer 55 as a rigid layer, the lateral pressure received by the coated optical fiber 50 (the external pressure received from the outer peripheral surface of the coated optical fiber 50) is obtained. Pressure), the outer layer 55 absorbs the pressure, and the inner layer 54 buffers the pressure even if the pressure cannot be completely absorbed by the outer layer 55. Therefore, light transmission loss due to the pressure applied to the glass fiber 51 can be reduced.
- the first UV curable resin layer 52 ⁇ has a Young's modulus of 0.5 MPa to 2 MPa
- the second UV curable resin layer 52B has a Young's modulus of 5 MPa to 150 OMPa
- the colored layer 52C has a Young's modulus of 52 MPa. It is preferably 500 MPa to 1500 MPa.
- the Young's modulus of the second ultraviolet curable resin layer 52B is 5 MPa to 60 OMPa. If the Young's modulus is less than 5 MPa, it is difficult to absorb the pressure from the outside and the glass fiber is easily damaged. On the other hand, when the Young's modulus exceeds 60 OMPa, it is difficult for the blade of the coating removing tool 20 described later to enter the second ultraviolet-curable resin layer 52B, and to separate the primary coating layer 52 from the coated optical fiber core. . As shown in FIG.
- the coated optical fiber core 50 has a structure in which the primary coating layer 52 is separated from the glass fiber 51 so that the first ultraviolet curable resin layer 52A and the second An ultraviolet curable resin layer 52B and a colored layer 52C are provided.
- first, first, a first ultraviolet curable resin layer 52A and a second ultraviolet curable resin layer 52B are provided on the outer periphery of the glass fiber 51, and then the resin is formed.
- the coloring layer 52C using a coating device and an ultraviolet irradiation device, the optical fiber core 53 can be suitably obtained.
- the colorant composition constituting the color layer 52C examples include a composition obtained by adding a pigment (such as an organic pigment) as a colorant and a known pigment dispersant to the ultraviolet-curable resin composition.
- the colorant composition can suitably contain, as the polymerizable oligomer, other curable oligomers such as epoxy (meth) acrylate, urethane acrylate, or ester-based acrylate 1.
- the coated optical fiber 50 can be suitably manufactured by applying a secondary coating layer 56 to the outer periphery of the optical fiber 53 obtained as described above.
- an optical fiber core 53 is fed out from a supply reel 61 and supplied to an extruder 63 through a tension control device 62.
- the extruder 63 comprises a first storage section 63A in which the components of the inner layer 54 are stored, a second storage section 63B in which the components of the outer layer 55 are stored, and the components of the inner layer 54 and the outer layer 55.
- a crosshead 63C capable of applying a secondary coating layer 56 to the outer periphery of the optical fiber core 53 by extruding the components in order.
- the components of the inner layer 54 and the components of the outer layer 55 are preferably applied to the outer periphery of the optical fiber core 53 in a molten state.
- the extruder 63 includes a heater (not shown) at a predetermined position. Prepare.
- the coated optical fiber cores 10 and 50 are preferably configured so that the transmission loss change (d BZ km) defined below is 0.2 dB / km or less, and is 0.1 ld BZkm or less. It is more preferred that
- Transmission loss change (dB / km): Transmission loss (wavelength: 1.5) during a heat cycle exposure test where -40 ° C (0.5 hours hold) to 85 ° C (0.5 hours hold) is repeated. 5 m, unit: dBZkm, including the transmission loss immediately after the start of the test) and the difference between the maximum transmission loss and the minimum transmission loss
- the first resin composition constituting the primary coating layer includes a first resin composed of an ultraviolet curable resin, and the secondary coating layer has a single-layer structure.
- the first resin means a resin of the first resin composition.
- the first resin is a silicone resin composition
- the secondary coating layer is a resin composition containing polyphenylene oxide
- the outer diameter up to the primary coating layer is 0.
- the linear expansion coefficient between the primary coating layer and the secondary coating layer may be due to the large thickness of the primary coating layer. Differences become apparent.
- the coated optical fiber core of the conventional example 1 was subjected to a rapid temperature change, the glass fiber was likely to be distorted due to uneven stress applied to the glass fiber, and the heat cycle test was performed.
- the amount of change in transmission loss is large. Therefore, in the coated optical fiber core of Conventional Example 1, the transmission loss due to the temperature change increases.
- the linear expansion coefficient of the second resin composition 4. is preferably not 0 X 10- 4 (1 / K ) or less.
- it refers to the coefficient of linear expansion of a sheet formed by curing the second resin composition.
- the coated optical fibers 10 and 50 according to the embodiment of the present invention are preferably configured such that the processing strain defined below is 150 tm or less.
- Processing strain Distance between the tip surface of the glass fiber and the tip surface of the secondary coating layer in the coated optical fiber core that has been subjected to heat treatment at 120 ° C for 168 hours.
- the thermal stress applied to the glass fiber (the primary coating) during extrusion molding is small, so that the temperature change may be caused by a temperature change such as a heat cycle test. It is estimated that there is little deterioration in characteristics such as an increase in transmission loss.
- the bistoning characteristics since the relative displacement of the glass fiber and the coating layer in the longitudinal direction is small due to the processing strain being in the above range, the bistoning characteristics (by giving a rapid temperature change for a long time, the glass fiber The primary coating including the tip surface and the glass fiber protrudes from the tip surface of the secondary coating layer).
- Conventional example 2 is a cable (electric wire) in which a flame retardant (a nitrogen-based flame retardant is not intended) is added to at least the outer surface of the insulator covering the conductor and the collective sheath.
- Patent Document 2 describes, as an insulator of Conventional Example 2, a material containing polyphenylene oxide, low-density polyethylene, and SEBS as resin components.
- the tip of the conductor may protrude from the tip of the insulator due to rapid temperature changes (this phenomenon is also referred to as "protrusion").
- protrusion even if such a cable protrudes when the cable is connected to another communication member at the end face, the problem of conduction does not become apparent.
- protrusion occurs when the coated optical fiber core is connected to another communication member at the end face, unintended stress is applied to the glass fiber, resulting in poor optical transmission characteristics or, in the worst case, breakage. Become.
- the insulator of Conventional Example 2 is applied to the coated optical fiber core of Conventional Example 1, the insulator of Conventional Example 2 and the insulator of the coated optical fiber core according to the embodiment of the present invention are nitrogen Coatings according to embodiments of the present invention by not being identical in that they do not contain flame retardants
- a person skilled in the art can apply the insulator of Conventional Example 2 which does not become an optical fiber core and in which the problem of "projection" of the optical fiber occurs, to the coated optical fiber core according to the embodiment of the present invention. Is not usually what you think.
- the second resin composition can be achieved by including 100 parts by weight to 250 parts by weight of the metal hydroxide based on 100 parts by weight of the second resin.
- the first resin composition constituting the second coating layer contains the first resin made of an ultraviolet curable resin; It is preferable to use a coated optical fiber having a structure in which the coating layer has two or more layers.
- a coated optical fiber core with a connector manufactured using the coated optical fiber core 50 whose secondary coating layer has a two-layer structure will be described.
- the end of the coated optical fiber 50 is added using the coating removing tool 20 (see FIG. 7). That is, the coated optical fiber 50 is held in the V-groove 23a of the coating removing device 20, and a portion approximately 3 O mm to 10 O mm away from the end of the coated optical fiber 50 is fixed by the fixing device 24.
- the cut is made by sandwiching the plate-like lever members 21a and 21b.
- the coating removing tool 20 prevents the blade tip 22A (the apex of the cut) of the blade 22 from reaching the glass fiber when the plate-like lever members 21a and 21b come into contact with each other.
- the glass fiber 51 is not damaged, and the secondary coating layer 56 is reliably cut. .
- the secondary coating layer 56 is completed. Since it has been completely cut, it moves together with the blade 22. However, since the primary coating layer 52 is not completely cut (the inside of the primary coating layer 52 has an apex of a cut), even if the blade moves, Is stretched, and the portion in close contact with the glass fiber 51 does not move with the blade 22 (see FIG. 5 (B)). During this time, the secondary coating layer 56 slides on the secondary coating layer 52. Here, the primary coating layer 52 near the blade 22 is compressed. ing.
- the length (L uv ) of the primary coating layer 52 ′ in the separated coating removal piece is preferably 15% to 85%.
- the force for closing the plate-like lever members 21a and 21b is usually related to the separation between the composite coating in which the secondary coating layer 56 is added to the primary coating layer 52 using the coating removing tool 20 and the glass fiber 51.
- the speed at which the primary coating layer 52 and the secondary coating layer 56 are pulled out is about 50 mmZ. At this time, the force of moving the coating removing tool 20 to pull out the primary coating layer 52 and the secondary coating layer 56 is the pulling force.
- the coefficient of friction between the coloring layer 52C (the outermost layer of the primary coating layer 52) and the inner layer 54 is adjusted to 0-2 to 0.5.
- a method for adjusting the coefficient of friction between the colored layer 52C and the inner layer 54 within the above range include a method of adjusting the type and the amount of the compound constituting these layers.
- a method of adjusting the coefficient of friction by adding a release agent to the inner layer 54 can be suitably used.
- the colored layer 52C containing a release agent can be suitably obtained by using a colorant composition to which a silicon acrylate is added as a part of the reaction dilutable monomer.
- silicone oil may be added to the colorant composition as a release agent.
- Examples of the release agent added to the inner layer 54 include silicone compounds such as silicone oil and mold release silicone (varnish / rubber type). It is added in the range of 0.5 to 10 parts by weight with respect to 100 parts by weight of the resin constituting the inner layer 54.
- the respective compositions of the inner layer 54 and the outer layer 55 are as follows. preferable.
- Inner layer 100 to 250 parts by weight of a metal hydroxide and less than 100 parts by weight of a nitrogen-based flame retardant, based on 100 parts by weight of a polyolefin-based thermoplastic resin.
- Outer layer 100 to 250 parts by weight of a metal hydroxide and 100 parts by weight of a nitrogen-based flame retardant with respect to 100 parts by weight of a polyolefin-based thermoplastic resin and / or a thermoplastic elastomer resin. Less than 0 parts by weight.
- the pulling force at the time of pulling out the primary coating layer 52 and the secondary coating layer 56 from the glass fiber 51 as described above is 2.5 kgf or less. This makes it possible to easily (without feeling a large load) pull out the primary coating layer 52 and the secondary coating layer 56 and expose the glass fiber 51 using the coating removing tool 20 described above.
- the pulling force is defined as the force applied in the direction of pulling out the resin layer (that is, the pulling force of the coating removing tool 20).
- the coated optical fiber 50 having the glass fiber exposed portion 51A and the coated end surface 56A produced by processing the end of the coated optical fiber 50 using the coating removing tool 20 see FIG. 7.
- the coated optical fiber core with connector 19 is manufactured (see FIG. 6). More specifically, while holding the exposed portion 51A of the glass fiber in the hollow 17A without applying a strain force, the coated end surface 56A is brought into contact with the abutting end surface 17B of the ferrule, and usually, fixing means is used to maintain this state. (Not shown) connect the coated optical fiber 50 and the connector 18. Therefore, the coated optical fiber core with connector 19 has no transmission loss due to distortion.
- the tip end face 51B of the glass fiber and the open end face 17C of the ferrule are polished or the like to be processed into a desired shape.
- the surface formed by the end face 51B of the glass fiber and the open end face 17C of the ferrule can be a flat surface, a spherical surface, or a curved surface, and can be appropriately selected according to the specifications of the coated optical fiber core with connector 19. Selected.
- the coated optical fiber core wire with connector 19 has no ultraviolet curable resin layer 12 remaining on the glass fiber exposed portion 11A, so that the glass fiber exposed portion 51A is housed in the hollow 17A without receiving a strain force.
- the contact between the coating end face 56A and the end face 17B of the ferrule is secured.
- the center of the distal end face 51B of the glass fiber exists at a desired position. Therefore, the coated optical fiber core with connector 19 has excellent optical transmission characteristics because there is no connection loss due to the displacement of the position of the glass fiber.
- the coated optical fiber core wire 19 with the connector uses the coated optical fiber core wire 50 according to the embodiment of the present invention, it hardly burns and does not generate toxic gas even when it burns.
- the metal hydroxide and the nitrogen-based flame retardant were added to 100 parts by weight of the second resin as shown in Table 1. Then, the second resin compositions used in Examples 1, 2-1, 2-3, and 3-1, 3-2 are prepared.
- the optical fiber core used is an optical fiber core made by providing an ultraviolet-curable resin layer (urethane acrylate resin layer) around the outer periphery of a glass fiber (outside diameter: 125 ⁇ ) composed mainly of quartz glass. I do.
- the UV-curable resin layer has a three-layer structure including a first UV-curable resin layer, a second UV-curable resin layer, and a colored layer, and the outer diameter up to the first UV-curable resin layer is 200 ⁇ m.
- outer diameter up to the second UV-curable resin layer is 245 m
- outer diameter up to the colored layer is 255 / im
- Young's modulus of the first UV-curable resin layer is 1 MPa (25 ° C )
- the Young's modulus of the second UV-curable resin layer is 40 OMPa (25 ° C)
- the Young's modulus of the colored layer is 110 OMPa (25 ° C).
- An optical fiber core is formed on the outer periphery of a glass fiber (outside diameter: 125 ⁇ ) mainly composed of quartz glass by an ultraviolet curing resin layer (urethane phthalate resin layer) in the same manner as in Examples 1 to 3. Is used.
- the UV-curable resin layer includes a first UV-curable resin layer, a second UV-curable resin layer, and a colored layer.
- the outer diameter up to the first UV-curable resin layer is 200 ⁇ m
- the outer diameter up to the second UV-curable resin layer is 245 ⁇ m
- the outer diameter up to the colored layer is 2 ⁇ m.
- the Young's modulus of the first UV-curable resin layer is IMP a (25 ° C)
- the Young's modulus of the second UV-curable resin layer is 400 MPa (25 ° C)
- the Young's modulus of the colored layer is 110 OMPa (25 ° C).
- the coated optical fibers of Comparative Examples 1 and 2 are prepared in the same manner as in Examples 1 to 3.
- Table 1 shows the composition of the second resin composition and each characteristic value of the coated optical fiber ribbon.
- Example 4-1 Example 4-2 Second resin composition
- test specimen sheet formed by curing the second resin composition
- TMA thermomechanical analyzer
- the second resin composition corresponding to each example and each comparative example is melt-kneaded with a resin composition using a known apparatus including a twin-screw kneading extruder, a pressure eder, a Banbury mixer, a roll, and the like. As a result, a film having a thickness of about 300 Aim is formed.
- a dumbbell-shaped No. 2 test piece (based on JIS K71113) is manufactured from the film-like material. Using this test piece, it means the Young's modulus measured by performing a tensile test under the conditions of a mark line distance of 25 mm and a tensile speed of 1 mm / min.
- the evaluation for the coated optical fiber core is performed as follows.
- the coated optical fiber with the end faces flush with the glass fiber, primary coating layer, and secondary coating layer is subjected to heat treatment at 120 ° C for 168 hours.
- the “distance between the tip surface of the glass fiber and the tip surface of the secondary coating layer” after the heat treatment is measured as the processing strain.
- the transmission loss (dB) of the coated optical fiber was measured with an OTDR measuring device (wavelength: 1.55 ⁇ ) (23 ° C), and the transmission loss per unit length was measured as “initial loss (dB / dB). km)
- the coated optical fiber core was subjected to the heat cycle exposure test described in the above temperature resistance characteristics 200 times, and the amount of protrusion of the glass fiber (distance between the tip end surface of the glass fiber and the tip end surface of the secondary coating layer) was measured. Measure. Table 2 shows the results. The smaller the amount of protrusion, the better the bistoning characteristics.
- the appearance of the coated optical fiber is visually observed and touched, and the condition satisfying “there is no“ roughness of surface shape ”and“ no convex foreign matter of about 10 to 100 zm ”” is defined as “ ⁇ ”. Those that do not satisfy are judged as "X”.
- the upper end of the coated optical fiber core wire 10 (or 50) having a predetermined length is gripped by the gripper 84, and the lower end is gripped by the gripper 85.
- the core wire 10 is installed so that the longitudinal direction is vertical, and absorbent cotton 83 is arranged below the lower end of the coated optical fiber core wire 10.
- Kraft paper 81 is stuck to a position slightly below the gripping portion 84 of the coated optical fiber 10.
- the burner 82 is exposed to a burner flame (ignition time: 15 seconds, extinguishing time: 15 seconds, 5 cycles) at a position 254 mm below the craft paper 81.
- the burner flame is 4 mm in internal flame and 125 mm in external flame.
- the part 3 mm in length from the end of the core wire is used for the stripping tool shown in Fig. 7.
- Luv ZL SH 0%
- L UV ZL SH 100 ° / 0
- the coated optical fiber of the embodiment is excellent in appearance and flame retardancy.
- the coated optical fiber core wire of Comparative Example 1 is inferior in flame retardancy because the amount of the nitrogen-based flame retardant is too small.
- the coated optical fiber core wire of Comparative Example 2 is inferior in appearance due to an excessive amount of the nitrogen-based flame retardant.
- the second resin composition constituting the secondary coating layer of the coated optical fiber cores of Examples and Comparative Examples does not contain Hakugen and phosphorus, the load on the environment is small. That is, the generation of toxic gas during combustion is suppressed. Phosphoric acid compounds do not flow into rivers and lakes, resulting in overnutrition of the rivers and lakes. Industrial applicability
- a coated optical fiber core that has a small load on the environment, has high flame retardancy, and can suppress a decrease in optical transmission characteristics even when a connector is connected.
- a coated optical fiber core with a connector having excellent environmental characteristics, mechanical characteristics and optical transmission characteristics can be provided.
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/523,994 US7542644B2 (en) | 2003-02-20 | 2004-02-19 | Coated optical fiber and coated optical fiber with connector |
EP04712701A EP1596234A4 (en) | 2003-02-20 | 2004-02-19 | COATED OPTICAL FIBER AND COATED OPTICAL FIBER HAVING A CONNECTOR |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2003043338A JP3912531B2 (ja) | 2003-02-20 | 2003-02-20 | 被覆光ファイバ心線 |
JP2003-43338 | 2003-02-20 | ||
JP2003044074A JP3912532B2 (ja) | 2002-02-21 | 2003-02-21 | 被覆光ファイバ心線、コネクタ付被覆光ファイバ心線、及び、光ファイバケーブル |
JP2003-44074 | 2003-02-21 |
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WO2004074898A1 true WO2004074898A1 (ja) | 2004-09-02 |
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PCT/JP2004/001888 WO2004074898A1 (ja) | 2003-02-20 | 2004-02-19 | 被覆光ファイバ心線及びコネクタ付被覆光ファイバ心線 |
Country Status (3)
Country | Link |
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US (1) | US7542644B2 (ja) |
EP (1) | EP1596234A4 (ja) |
WO (1) | WO2004074898A1 (ja) |
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JP2007333795A (ja) * | 2006-06-12 | 2007-12-27 | Furukawa Electric Co Ltd:The | 光ファイバ心線及びその製造方法 |
WO2008096637A1 (ja) * | 2007-02-08 | 2008-08-14 | Sumitomo Electric Industries, Ltd. | 光ケーブル |
JP4325687B2 (ja) | 2007-02-23 | 2009-09-02 | 株式会社デンソー | 電子装置 |
JP5008644B2 (ja) * | 2008-02-25 | 2012-08-22 | 株式会社フジクラ | 光ファイバ付き光フェルール |
ITMI20080421A1 (it) * | 2008-03-13 | 2009-09-14 | Tratos Cavi S P A | Cavo a fibre ottiche e procedimento per la sua messa in opera |
JP4657327B2 (ja) * | 2008-07-17 | 2011-03-23 | 三菱電線工業株式会社 | 光ファイバ心線へのコネクタの固定構造 |
JP2010152340A (ja) * | 2008-11-18 | 2010-07-08 | Fujikura Ltd | 光ファイバケーブルおよびこれに用いられる樹脂組成物 |
WO2011100273A1 (en) * | 2010-02-11 | 2011-08-18 | Corning Incorporated | Fiber optic connectors and structures for optical fibers and methods for using the same |
EP2722699A4 (en) * | 2011-06-14 | 2015-01-14 | Mitsubishi Rayon Co | COMPOSITION FOR COATING AN OPTICAL FIBER AND OPTICAL FIBER CABLE |
US8855455B2 (en) * | 2011-11-23 | 2014-10-07 | Nexans | Fiber optic cable |
TWI571664B (zh) * | 2012-09-14 | 2017-02-21 | 鴻海精密工業股份有限公司 | 矽工作台 |
US9453980B2 (en) * | 2013-03-22 | 2016-09-27 | Mitsubishi Rayon Co., Ltd. | Optical fiber cable |
WO2014148609A1 (ja) * | 2013-03-22 | 2014-09-25 | 三菱レイヨン株式会社 | 光ファイバケーブル及び移動媒体 |
US10222547B2 (en) | 2015-11-30 | 2019-03-05 | Corning Incorporated | Flame-retardant optical fiber coating |
US11169323B2 (en) * | 2016-04-15 | 2021-11-09 | Zeus Industrial Products, Inc. | Thermoplastic-coated optical elements |
EP3521883A4 (en) * | 2016-09-30 | 2020-05-13 | Fujikura Ltd. | COLORED FIBERGLASS CORE, FIBERGLASS CABLE AND METHOD FOR PRODUCING A COLORED FIBERGLASS CORE |
CN109716195A (zh) | 2016-09-30 | 2019-05-03 | 株式会社藤仓 | 光纤带、光缆以及光纤带的制造方法 |
US10167396B2 (en) | 2017-05-03 | 2019-01-01 | Corning Incorporated | Low smoke fire-resistant optical ribbon |
US11287590B2 (en) * | 2017-06-12 | 2022-03-29 | Corning Research & Development Corporation | In-road interface protected cable |
JP6728107B2 (ja) | 2017-06-22 | 2020-07-22 | 株式会社クボタ | 牧草管理システム |
EP3778682A4 (en) | 2018-04-02 | 2021-12-15 | Sumitomo Electric Industries, Ltd. | COMPOSITION OF RESIN, SECONDARY COATING MATERIAL FOR FIBER OPTIC AND FIBER OPTIC |
KR102669759B1 (ko) | 2018-04-16 | 2024-05-27 | 스미토모 덴키 고교 가부시키가이샤 | 광섬유 |
WO2020040223A1 (ja) | 2018-08-22 | 2020-02-27 | 住友電気工業株式会社 | 光ファイバ |
WO2020054753A1 (ja) | 2018-09-13 | 2020-03-19 | 古河電気工業株式会社 | 光ファイバ心線及び光ファイバケーブル |
KR20220024446A (ko) * | 2019-06-18 | 2022-03-03 | 스미토모 덴키 고교 가부시키가이샤 | 광파이버 |
DE102019120052A1 (de) * | 2019-07-24 | 2021-01-28 | SchäferRolls GmbH & Co. KG | Technische Walze, insbesondere für die Papierherstellung, Verfahren zum Einbringen einer Polymerfaser in ein Leerrohr einer technischen Walze und Verwendung einer Polymerfaser |
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Also Published As
Publication number | Publication date |
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EP1596234A1 (en) | 2005-11-16 |
US20060088263A1 (en) | 2006-04-27 |
US7542644B2 (en) | 2009-06-02 |
EP1596234A4 (en) | 2006-03-22 |
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