WO2019221248A1 - 光ファイバ - Google Patents
光ファイバ Download PDFInfo
- Publication number
- WO2019221248A1 WO2019221248A1 PCT/JP2019/019577 JP2019019577W WO2019221248A1 WO 2019221248 A1 WO2019221248 A1 WO 2019221248A1 JP 2019019577 W JP2019019577 W JP 2019019577W WO 2019221248 A1 WO2019221248 A1 WO 2019221248A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin layer
- optical fiber
- meth
- acrylate
- resin composition
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
-
- 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
- C03C25/105—Organic claddings
-
- 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
-
- 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
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/325—Polycarbonates
-
- 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
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/326—Polyureas; Polyurethanes
-
- 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
- C03C25/24—Coatings containing organic materials
- C03C25/40—Organo-silicon compounds
-
- 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
- C03C25/42—Coatings containing inorganic materials
-
- 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
- C03C25/48—Coating with two or more coatings having different compositions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
- C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
Definitions
- the present disclosure relates to optical fibers.
- This application claims priority based on Japanese Patent Application No. 2018-094592 filed on May 16, 2018, and incorporates all the description content described in the above Japanese application.
- an optical fiber has a coating resin layer for protecting a glass fiber that is an optical transmission body.
- the covering resin layer is composed of, for example, a primary resin layer and a secondary resin layer.
- the optical fiber is required to have an improved side pressure characteristic.
- Patent Document 1 a resin composition containing a urethane oligomer obtained by reacting a monohydric alcohol and a hydroxyl group-containing (meth) acrylate with a reaction product of an aliphatic polyether diol and a diisocyanate is used. It has been studied to achieve both flexibility (low Young's modulus) and mechanical strength.
- An optical fiber includes a glass fiber including a core and a cladding, a primary resin layer that is in contact with the glass fiber and covers the glass fiber, and a secondary resin layer that covers the primary resin layer.
- the resin layer contains a cured product of a resin composition containing a urethane (meth) acrylate oligomer, a monomer, a photopolymerization initiator, and an aromatic acidic compound, and the content of the aromatic acidic compound is based on the total amount of the resin composition
- the Young's modulus of the primary resin layer is 0.6 MPa or less at 23 ° C. ⁇ 2 ° C.
- FIG. 2A is a diagram showing a configuration of a metal mesh material used for a mesh side pressure test.
- FIG. 2B is a partially enlarged view of FIG. 2A.
- an optical fiber including a primary resin layer having a low Young's modulus tends to have a low glass strength maintenance rate when immersed in water. Therefore, an object of the present disclosure is to provide an optical fiber that can suppress a decrease in glass strength even when immersed in water for a long period of time.
- An optical fiber according to an aspect of the present disclosure includes a glass fiber including a core and a cladding, a primary resin layer that is in contact with the glass fiber and covers the glass fiber, and a secondary resin layer that covers the primary resin layer.
- the resin layer contains a cured product of a resin composition containing a urethane (meth) acrylate oligomer, a monomer, a photopolymerization initiator, and an aromatic acidic compound, and the content of the aromatic acidic compound is based on the total amount of the resin composition
- the Young's modulus of the primary resin layer is 0.6 MPa or less at 23 ° C. ⁇ 2 ° C.
- the resin composition may contain two or more aromatic acidic compounds.
- the aromatic acidic compound may contain diphenylphosphinic acid and trimethylbenzoic acid.
- the resin composition contains a polar monomer as a monomer, and the content of the polar monomer is based on the total amount of the resin composition. 3 mass% or more and 15 mass% or less may be sufficient.
- the resin composition may further contain two or more silane coupling agents from the viewpoint of improving the adhesion of the primary resin layer to the glass fiber and further increasing the glass strength maintenance rate under high temperature and high humidity.
- FIG. 1 is a schematic cross-sectional view showing an example of an optical fiber according to the present embodiment.
- the optical fiber 10 includes a glass fiber 13 including a core 11 and a clad 12, and a covering resin layer 16 including a primary resin layer 14 and a secondary resin layer 15 provided on the outer periphery of the glass fiber 13.
- the clad 12 surrounds the core 11.
- the core 11 and the clad 12 mainly include glass such as quartz glass.
- the core 11 can be made of quartz to which germanium is added, and the clad 12 is made of pure quartz or quartz to which fluorine is added. be able to.
- the outer diameter (D2) of the glass fiber 13 is about 125 ⁇ m, and the diameter (D1) of the core 11 constituting the glass fiber 13 is about 7 to 15 ⁇ m.
- the thickness of the coating resin layer 16 is usually about 60 to 70 ⁇ m.
- the thickness of each of the primary resin layer 14 and the secondary resin layer 15 may be about 10 to 50 ⁇ m.
- the thickness of the primary resin layer 14 is 35 ⁇ m and the thickness of the secondary resin layer 15 is 25 ⁇ m. May be.
- the outer diameter of the optical fiber 10 may be about 245 to 265 ⁇ m.
- the thickness of the coating resin layer 16 may be about 27 to 48 ⁇ m.
- the thickness of each of the primary resin layer 14 and the secondary resin layer 15 may be about 10 to 38 ⁇ m.
- the thickness of the primary resin layer 14 is 25 ⁇ m and the thickness of the secondary resin layer 15 is May be 10 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 180 to 220 ⁇ m.
- the Young's modulus of the primary resin layer is 0.6 MPa or less at 23 ° C., preferably 0.5 MPa or less, and more preferably 0.3 MPa or less.
- the lower limit of the Young's modulus of the primary resin layer is not particularly limited, it is about 0.05 MPa.
- the Young's modulus of the primary resin layer can be measured by a Pullout Modulus test at 23 ° C.
- the Young's modulus of the primary resin layer can be adjusted by the type of oligomer, the molecular weight of the oligomer, the type of monomer, the amount of monomer blended, and the like.
- the primary resin layer 14 can be formed by curing an ultraviolet curable resin composition containing a urethane (meth) acrylate oligomer, a monomer, a photopolymerization initiator, and an aromatic acidic compound.
- (meth) acrylate means acrylate or methacrylate corresponding thereto.
- Examples of the urethane (meth) acrylate oligomer include oligomers obtained by reacting a polyol compound, a polyisocyanate compound, and a hydroxyl group-containing (meth) acrylate compound.
- polystyrene resin examples include polytetramethylene glycol, polypropylene glycol, and bisphenol A / ethylene oxide addition diol. From the viewpoint of reducing the Young's modulus of the primary resin layer, the number average molecular weight of the polyol compound may be 1000 to 8000.
- polyisocyanate compound examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane 4,4'-diisocyanate.
- Examples of the hydroxyl group-containing (meth) acrylate compound include 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 1,6-hexanediol mono (meth) acrylate, pentaerythritol tri (meth) acrylate, Examples include 2-hydroxypropyl (meth) acrylate and tripropylene glycol (meth) acrylate.
- An organotin compound is generally used as a catalyst for synthesizing a urethane (meth) acrylate oligomer.
- the organic tin compound include dibutyltin dilaurate, dibutyltin diacetate, dibutyltin malate, dibutyltin bis (2-ethylhexyl mercaptoacetate), dibutyltin bis (isooctyl mercaptoacetate) and dibutyltin oxide. From the viewpoint of easy availability or catalyst performance, it is preferable to use dibutyltin dilaurate or dibutyltin diacetate as the catalyst.
- a lower alcohol having 5 or less carbon atoms may be used during the synthesis of the urethane (meth) acrylate oligomer.
- the lower alcohol include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, 1-pentanol, 2-pentanol, 3-pentanol, Examples include 2-methyl-1-butanol, 3-methyl-1-butanol, 2-methyl-2-butanol, 3-methyl-2-butanol and 2,2-dimethyl-1-propanol.
- urethane (meth) acrylate oligomer preparation of the urethane (meth) acrylate oligomer will be described with specific examples.
- polypropylene glycol is used as the polyol
- isophorone diisocyanate is used as the polyisocyanate
- 2-hydroxyethyl acrylate is used as the hydroxyl group-containing (meth) acrylate
- methanol is used as the alcohol
- a urethane (meth) acrylate oligomer containing the following three types of reaction products is used. Can be obtained.
- H represents a residue of 2-hydroxyethyl acrylate
- I represents a residue of isophorone diisocyanate
- PPG represents a residue of polypropylene glycol
- Me represents a residue of methanol
- n represents 1 or more. Represents an integer.
- reaction product (1) is a double-end reactive oligomer
- the crosslink density of the cured product is increased.
- the reaction product (2) is a single-end reactive oligomer
- the crosslink density of the cured product is decreased. There is an effect, and Young's modulus can be reduced.
- the reaction product (3) is a non-reactive oligomer at both ends and does not undergo UV curing, it is preferably prepared so as to be as small as possible. Even if alcohol other than methanol is used, a single-terminal nonreactive oligomer or a double-terminal nonreactive oligomer can be prepared.
- a silane coupling agent having a functional group that reacts with an isocyanate group When synthesizing a urethane (meth) acrylate oligomer, a silane coupling agent having a functional group that reacts with an isocyanate group may be used.
- the silane coupling agent having a functional group that reacts with an isocyanate group include N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane and N-2- (aminoethyl) -3-aminopropyltrimethoxy.
- Examples include silane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropylmethyldimethoxysilane and 3-mercaptopropyltrimethoxysilane.
- a polyol compound and an isocyanate compound are reacted, and a hydroxyl group-containing (meth) acrylate compound and a silane coupling agent are used in combination with an isocyanate group at both ends, and reacted with an isocyanate group.
- the one-terminal silane coupling agent-added oligomer can be synthesized. As a result, since the oligomer can react with the glass, the adhesion between the glass fiber 13 and the primary resin layer 14 can be improved.
- a monofunctional monomer having one polymerizable group or a polyfunctional monomer having two or more polymerizable groups can be used. Two or more kinds of monomers may be mixed and used.
- Examples of the monofunctional monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, s-butyl (meth) acrylate, tert-butyl (meth) acrylate, Isobutyl (meth) acrylate, n-pentyl (meth) acrylate, isopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, isoamyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (Meth) acrylate, isooctyl (meth) acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, phenoxyethyl (meth) acrylate,
- a polar monomer may be used as the monofunctional monomer because it accelerates the curing of the resin composition by ultraviolet rays and reduces the residual uncured components in the primary resin layer.
- the polar monomer include the heterocyclic ring-containing (meth) acrylate, N-substituted amide monomer, aminoalkyl (meth) acrylate monomer, and succinimide monomer.
- a heterocycle-containing (meth) acrylate is preferable as the polar monomer, and N-vinylcaprolactam is more preferable because it is difficult to be inhibited by oxygen.
- the content of the polar monomer is preferably 3% by mass or more and 15% by mass or less, and more preferably 7% by mass or more and 15% by mass or less based on the total amount of the resin composition.
- polyfunctional monomer examples include ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, Di (meth) acrylates of alkylene oxide adducts of bisphenol A, tetraethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate hydroxypivalate, 1,4-butanediol di (meth) acrylate, 1,6 -Hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,12-dodecanediol di (meth) acrylate, 1,14-tetradecanediol (Meth) acrylate, 1,16-hexadecaned
- the photopolymerization initiator can be appropriately selected from known radical photopolymerization initiators.
- the photopolymerization initiator include 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, bis ( 2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propan-1-one (Omnirad 907, IGM Resins) 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Omnirad TPO, manufactured by IGM Resins) and bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide (Omnirad 819, manufactured by IGM Resins) It is.
- the aromatic acidic compound is not particularly limited as long as it is a compound having an aromatic ring and an acidic group.
- aromatic acidic compounds include aromatic carboxylic acids, aromatic phosphinic acids, and aromatic phosphonic acids. From the viewpoint of adjusting the acidity of the primary resin layer, two or more compounds having different acidities may be mixed and used as the aromatic acidic compound.
- aromatic carboxylic acid examples include benzoic acid, phthalic acid, methyl benzoic acid, dimethyl benzoic acid, trimethyl benzoic acid, hydroxymethyl benzoic acid, propyl benzoic acid, butyl benzoic acid, hexyl benzoic acid, naphthalene carboxylic acid and anthra carboxylic Examples include acids.
- aromatic phosphinic acid examples include diphenylphosphinic acid and phenylphosphinic acid.
- aromatic phosphonic acid examples include phenylphosphonic acid and 4-methoxyphenylphosphonic acid.
- aromatic carboxylic acid and an aromatic phosphinic acid in combination as the aromatic acidic compound. More preferably, diphenylphosphinic acid and trimethylbenzoic acid are used in combination.
- the content of the aromatic acidic compound is 20 ppm or more and 12000 ppm or less based on the total amount of the resin composition, and 25 ppm or more and 11000 ppm or less because it suppresses the decrease in the glass strength of the optical fiber when immersed in water for a long period of time. Is preferable, and 30 ppm or more and 10,000 ppm or less are more preferable.
- the resin composition may further contain a silane coupling agent, a photoacid generator, a leveling agent, an antifoaming agent, an antioxidant, and the like.
- silane coupling agent By using a silane coupling agent, it is possible to adjust the adhesion between the glass fiber 13 and the primary resin layer 14 or to improve the dynamic fatigue characteristics.
- the silane coupling agent is not particularly limited as long as it does not hinder the curing of the resin composition.
- Examples of silane coupling agents include tetramethyl silicate, tetraethyl silicate, mercaptopropyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris ( ⁇ -methoxy-ethoxy) silane, ⁇ - (3,4-epoxycyclohexyl).
- the resin composition forming the primary resin layer is composed of two or more silanes having different reactivities. It is preferable that a coupling agent is included.
- an onium salt having a structure of A + B ⁇ may be used.
- the photoacid generator examples include UVACURE 1590 (manufactured by Daicel Cytec), sulfonium salts such as CPI-100P, 110P, and 210S (manufactured by San Apro), Omnicat 250 (manufactured by IGM Resins), WPI-113 (Fuji Film Wako Pure). And iodonium salts such as Rp-2074 (manufactured by Rhodia Japan).
- the secondary resin layer 15 can be formed, for example, by curing an ultraviolet curable resin composition containing a urethane (meth) acrylate oligomer, a monomer, and a photopolymerization initiator.
- a urethane (meth) acrylate oligomer, a monomer, and a photoinitiator it can select suitably from what was illustrated with the resin composition which forms a primary resin layer.
- the secondary resin layer 15 may contain inorganic oxide particles such as silica and alumina. However, the resin composition forming the secondary resin layer has a different composition from the resin composition forming the primary resin layer.
- the Young's modulus of the secondary resin layer is preferably 500 MPa or more at 23 ° C., more preferably 800 MPa or more.
- the Young's modulus of the secondary resin layer may be 3000 MPa or less, 2500 MPa or less, 1400 MPa or less, or 1200 MPa or less at 23 ° C.
- the Young's modulus of the secondary resin layer is 500 MPa or more, it is easy to improve the lateral pressure resistance, and when it is 3000 MPa or less, it has an appropriate elongation at break, so that it is difficult to be destroyed at the time of coating removal and is excellent in coating removability.
- a secondary resin layer is thin, there exists a tendency for glass strength to fall easily under water immersion.
- the higher the Young's modulus of the secondary resin layer the higher the crosslink density of the secondary resin layer and the higher the barrier property. Therefore, the Young's modulus of the secondary resin layer may be 1500 MPa or more.
- the characteristics of the optical fiber applied to the present disclosure include, for example, when the mode field diameter at a wavelength of 1310 nm is 8.2 ⁇ m or more and 9.6 ⁇ m or less, the cable cutoff wavelength is 1260 nm or less, and is wound 100 times on a mandrel having a radius of 30 mm (
- the increase in loss at a wavelength of 1625 nm (per 100 turns) may be 0.1 dB or less, and the increase in loss at a wavelength of 1625 nm when wound around a mandrel with a radius of 15 mm (per 10 turns) is 1.0 dB. It may be the following.
- the characteristics of the optical fiber are: transmission loss at a wavelength of 1550 nm when the optical fiber is wound at a tension of 80 g around a bobbin in which a metal mesh material having a vertical line diameter of 50 ⁇ m, a horizontal line diameter of 50 ⁇ m, and a pitch of 150 ⁇ m is wound;
- the difference in transmission loss at a wavelength of 1550 nm may be 1.0 dB / km or less.
- the characteristics of the optical fiber of the present disclosure are not limited to the above examples.
- Resin composition for primary resin layer (Oligomer)
- Urethane acrylate oligomers a1, a2, a3 and a4 obtained by reacting polypropylene glycol having a molecular weight of 4000, isophorone diisocyanate, hydroxyethyl acrylate and methanol were prepared.
- urethane acrylate oligomers a1, a2, a3 and a4 by changing the mixing ratio of hydroxyethyl acrylate and methanol, an oligomer having acryloyl groups at both ends (both end reactive oligomers) and an acryloyl group at one end The ratio with the oligomer (one-end reactive oligomer) is adjusted.
- Diphenylphosphinic acid and trimethylbenzoic acid were prepared as aromatic acidic compounds. Lactic acid was prepared as an aliphatic acidic compound.
- silane coupling agent As a silane coupling agent, 3-mercaptopropyltrimethoxysilane (MPTS) and tetraethyl silicate (TEOS) were prepared.
- MPTS 3-mercaptopropyltrimethoxysilane
- TEOS tetraethyl silicate
- Resin composition The above oligomer, monomer, photopolymerization initiator, acidic compound, and silane coupling agent were mixed to prepare resin compositions for primary resin layers shown in Tables 1 to 4, respectively.
- lactic acid is contained as the aliphatic acidic compound.
- the numerical values of N-vinylcaprolactam, MPTS, TEOS, diphenylphosphinic acid, trimethylbenzoic acid and lactic acid in the table are contents based on the total amount of the resin composition. In addition, you may consider that the total amount of a resin composition is the same as the total amount of the hardened
- Resin composition for secondary resin layer A urethane acrylate oligomer which is a reaction product of polypropylene glycol having a molecular weight of 1000, isophorone diisocyanate and 2-hydroxyethyl acrylate was prepared. A secondary resin layer obtained by mixing 60 parts by mass of urethane acrylate oligomer, 19 parts by mass of isobornyl acrylate, 20 parts by mass of trimethylolpropane triacrylate, and 1 part by mass of 2,4,6-trimethylbenzoyldiphenylphosphine oxide. Resin composition b1 was prepared. Silica particles were added to the resin composition b1 to prepare a resin composition b3 for the secondary resin layer.
- Resin composition for secondary resin layer by changing mixing ratio of urethane acrylate oligomer, isobornyl acrylate, trimethylolpropane triacrylate, epoxy acrylate having bisphenol A skeleton, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide Products b2, b4 and b5 were prepared.
- a primary resin layer having a thickness of 15 to 35 ⁇ m is formed on the outer periphery of a glass fiber having a diameter of 125 ⁇ m composed of a core and a clad using a resin composition for a primary resin layer, and a resin for a secondary resin layer is further formed on the outer periphery.
- the secondary resin layer was formed using the composition, and the optical fiber of the Example and the comparative example was produced.
- the linear velocity was 1500 m / min.
- the Young's modulus of the primary resin layer was measured by a Pullout Modulus test at 23 ° C. Specifically, the coating resin layer of the optical fiber was cut with a razor or the like to cut the coating resin layer, the coating resin layers (primary resin layer and secondary resin layer) were fixed, and the glass fiber was drawn. The stress of the primary resin layer was determined from the amount of elastic deformation of the primary resin layer before the glass fiber was pulled out and the force that pulled the glass fiber.
- Glass strength of optical fiber The optical fiber bundle was immersed in warm water at 85 ° C. for 60 days, and the glass strength before and after immersion was evaluated. The glass strength was judged by measuring 50% strength. The 50% strength is the strength at which half of the optical fiber under test breaks in the tensile test of the optical fiber. In this example, a tensile test of each optical fiber to be tested was performed at a tensile speed of 25 mm / min. When the 50% strength value of the glass strength after immersion is less than 80% with respect to the 50% strength value of the glass strength before immersion, “bad” (C), and “good (B ) ”, A case where it was larger than 90% was judged as“ particularly good (A) ”.
- FIG. 2A is a diagram showing a configuration of the metal mesh material 30 used in the mesh side pressure test
- FIG. 2B is a partially enlarged view of B in FIG. 2A.
- the metal mesh member 30 has a mesh-like form in which a plurality of metal wires are stretched in each direction.
- the vertical wire diameter ⁇ 1 and the horizontal wire diameter ⁇ 2 are 50 ⁇ m.
- the pitch P between the center lines of the vertical lines and the center line of the horizontal lines is 150 ⁇ m.
- the vertical line protrusion length L1 is 100 ⁇ m
- the horizontal line protrusion length L2 is 100 ⁇ m.
- the optical fiber 10 is wound at a tension of 80 g, for example, on a bobbin obtained by winding the metal mesh material 30 shown in FIGS. This was performed by obtaining the difference between the transmission loss value and the transmission loss value at a wavelength of 1550 nm in a state after bundling (a state where the optical fiber 10 was removed from the bobbin). The results are shown in Table 4.
- SYMBOLS 10 Optical fiber, 11 ... Core, 12 ... Cladding, 13 ... Glass fiber, 14 ... Primary resin layer, 15 ... Secondary resin layer, 16 ... Covering resin layer, 30 ... Metal mesh material.
Abstract
Description
本出願は、2018年5月16日出願の日本出願第2018-094592号に基づく優先権を主張し、前記日本出願に記載された全ての記載内容を援用するものである。
光ファイバは、長期間水に浸漬された場合にも強度等の特性を維持することが求められている。しかしながら、低ヤング率のプライマリ樹脂層を備える光ファイバは、水浸漬下でガラス強度の維持率が低くなり易い傾向がある。そこで、本開示は、長期間水に浸漬された場合にもガラス強度の低下を抑制できる光ファイバを提供することを目的とする。
本開示によれば、長期間水に浸漬された場合にもガラス強度の低下を抑制できる光ファイバを提供することができる。
最初に、本開示の実施形態の内容を列記して説明する。本開示の一態様に係る光ファイバは、コア及びクラッドを含むガラスファイバと、ガラスファイバに接して該ガラスファイバを被覆するプライマリ樹脂層と、プライマリ樹脂層を被覆するセカンダリ樹脂層とを備え、プライマリ樹脂層が、ウレタン(メタ)アクリレートオリゴマー、モノマー、光重合開始剤及び芳香族酸性化合物を含む樹脂組成物の硬化物を含有し、芳香族酸性化合物の含有量が、樹脂組成物の総量を基準として20ppm以上12000ppm以下であり、プライマリ樹脂層のヤング率が、23℃±2℃で0.6MPa以下である。
本開示の実施形態に係る樹脂組成物及び光ファイバの具体例を、必要により図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されず、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。以下の説明では、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
(1)H-I-(PPG-I)n-H
(2)H-I-(PPG-I)n-Me
(3)Me-I-(PPG-I)n-Me
ここで、Hは2-ヒドロキシエチルアクリレートの残基を表し、Iはイソホロンジイソシアネートの残基を表し、PPGはポリプロピレングリコールの残基を表し、Meはメタノールの残基を表し、nは1以上の整数を表す。
(オリゴマー)
分子量4000のポリプロピレングリコール、イソホロンジイソシアネート、ヒドロキシエチルアクリレート及びメタノールを反応させて得られるウレタンアクリレートオリゴマーa1、a2、a3及びa4を準備した。ウレタンアクリレートオリゴマーa1、a2、a3及びa4では、ヒドロキシエチルアクリレート及びメタノールの配合割合を変更することで、アクリロイル基を両末端に有するオリゴマー(両末端反応性オリゴマー)と、アクリロイル基を片末端に有するオリゴマー(片末端反応性オリゴマー)との割合を調整している。
モノマーとして、エチレンオキシド変性ノニルフェニルアクリレート、N-ビニルカプロラクタム及び1,6-ヘキサンジオールジアクリレートを準備した。
光重合開始剤として、2,4,6-トリメチルベンゾイルジフェニルホスフィンオキシドを準備した。
芳香族酸性化合物として、ジフェニルホスフィン酸及びトリメチル安息香酸を準備した。脂肪族酸性化合物として、乳酸を準備した。
シランカップリング剤として、3-メルカプトプロピルトリメトキシシラン(MPTS)及びテトラエチルシリケート(TEOS)を準備した。
上記オリゴマー、モノマー、光重合開始剤、酸性化合物及びシランカップリング剤を混合して、表1~4に示すプライマリ樹脂層用の樹脂組成物をそれぞれ作製した。比較例3では、脂肪族酸性化合物として乳酸を含有している。表中のN-ビニルカプロラクタム、MPTS、TEOS、ジフェニルホスフィン酸、トリメチル安息香酸及び乳酸の数値は、樹脂組成物の総量を基準とする含有量である。なお、樹脂組成物の総量は樹脂組成物の硬化物の総量と同じと考えてよい。
分子量1000のポリプロピレングリコール、イソホロンジイソシアネート及び2-ヒドロキシエチルアクリレートの反応物であるウレタンアクリレートオリゴマーを準備した。ウレタンアクリレートオリゴマー60質量部と、イソボルニルアクリレート19質量部と、トリメチロールプロパントリアクリレート20質量部と、2,4,6-トリメチルベンゾイルジフェニルホスフィンオキシド1質量部とを混合して、セカンダリ樹脂層用の樹脂組成物b1を作製した。樹脂組成物b1にシリカ粒子を添加して、セカンダリ樹脂層用の樹脂組成物b3を調製した。
コア及びクラッドから構成される直径125μmのガラスファイバの外周に、プライマリ樹脂層用の樹脂組成物を用いて厚さ15~35μmのプライマリ樹脂層を形成し、更にその外周にセカンダリ樹脂層用の樹脂組成物を用いてセカンダリ樹脂層を形成して、実施例及び比較例の光ファイバを作製した。線速は1500m/分とした。
プライマリ樹脂層のヤング率は、23℃でのPullout Modulus試験によって測定した。具体的には、光ファイバの被覆樹脂層にカミソリ等で切れ目を入れて被覆樹脂層を切り、被覆樹脂層(プライマリ樹脂層及びセカンダリ樹脂層)を固定してガラスファイバを引き抜いた。ガラスファイバが引き抜かれる前にプライマリ樹脂層が弾性変形する量と、ガラスファイバを引っ張った力からプライマリ樹脂層の応力を求めた。
セカンダリ樹脂層のヤング率は、光ファイバを溶剤( エタノール: アセトン=3:7)に浸漬して被覆樹脂層をガラスファイバからパイプ抜きしたサンプル(50mm以上)を用いて測定した。パイプ抜きしたサンプルを23±2℃、50±10%RHの条件下で1日以上静置した後、引張試験機を用いて1mm/分の引張速度、標線間25mmの条件で引っ張り、応力-歪み曲線を得た。その曲線の2.5%割線によりヤング率を求めた。
光ファイバの束を85℃の温水中に60日間浸漬し、浸漬前後のガラス強度を評価した。ガラス強度は50%強度の測定により良否を判断した。50%強度は、光ファイバの引張試験において被試験光ファイバの半数が破断する強度である。本実施例では、引張速度25mm/分で各被試験光ファイバの引張試験を行った。浸漬前のガラス強度の50%強度値に対し、浸漬後のガラス強度の50%強度値が、80%よりも小さい場合を「不良(C)」、80~90%の場合を「良好(B)」、90%よりも大きい場合を「特に良好(A)」と判断した。
半径15mmのマンドレルに光ファイバを10ターン巻きつけた時の伝送損失変化(損失増)を求めた(R15mm×10ターン)。波長1625nmにおける伝送損失の増加が1.0dB以下を許容値とした。
光ファイバの耐側圧特性をメッシュ側圧試験により評価した。図2Aは、メッシュ側圧試験に使用される金属メッシュ材30の構成を示す図であり、図2Bは図2AのBの部分拡大図である。図2A及び図2Bに示されるように、金属メッシュ材30は、縦横それぞれ複数本の金属線が張り巡らされたメッシュ状の形態を有する。縦線径φ1及び横線径φ2は、50μmである。縦線の中心線間、及び横線の中心線間のピッチPは、150μmである。縦線突出長さL1は100μmであり、横線突出長さL2は100μmである。
Claims (8)
- コア及びクラッドを含むガラスファイバと、前記ガラスファイバに接して該ガラスファイバを被覆するプライマリ樹脂層と、前記プライマリ樹脂層を被覆するセカンダリ樹脂層と、を備え、
前記プライマリ樹脂層が、ウレタン(メタ)アクリレートオリゴマー、モノマー、光重合開始剤及び芳香族酸性化合物を含む樹脂組成物の硬化物を含有し、
前記芳香族酸性化合物の含有量が、前記樹脂組成物の総量を基準として20ppm以上12000ppm以下であり、
前記プライマリ樹脂層のヤング率が、23℃±2℃で0.6MPa以下である、光ファイバ。 - 前記樹脂組成物が、前記芳香族酸性化合物を2種以上含む、請求項1に記載の光ファイバ。
- 前記芳香族酸性化合物が、ジフェニルホスフィン酸及びトリメチル安息香酸を含む、請求項2に記載の光ファイバ。
- 前記樹脂組成物が、前記モノマーとして極性モノマーを含み、前記極性モノマーの含有量が、前記樹脂組成物の総量を基準として3質量%以上15質量%以下である、請求項1から請求項3のいずれか一項に記載の光ファイバ。
- 前記樹脂組成物が、2種以上のシランカップリング剤を更に含む、請求項1から請求項4のいずれか一項に記載の光ファイバ。
- 前記セカンダリ樹脂層のヤング率が23℃で1500MPa以上である、請求項1から請求項5のいずれか一項に記載の光ファイバ。
- 前記セカンダリ樹脂層が無機酸化物を含む、請求項1から請求項6のいずれか一項に記載の光ファイバ。
- 前記光ファイバの波長1310nmにおけるモードフィールド径が8.2μm以上9.6μm以下であり、ケーブルカットオフ波長が1260nm以下であり、
前記光ファイバを半径が15mmのマンドレルに巻いたときの、巻き数10回あたりの波長1625nmにおける曲げ損失増が1.0dB以下であり、
縦線径50μm、横線径50μm、ピッチ150μmの金属メッシュ材が巻かれたボビンに当該光ファイバが張力80gで巻き付けられたときの波長1550nmにおける伝送損失と、束状態での波長1550nmにおける伝送損失の差が1.0dB/km以下である、請求項1から請求項7のいずれか一項に記載の光ファイバ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/054,589 US11927798B2 (en) | 2018-05-16 | 2019-05-16 | Optical fiber |
KR1020207035536A KR20210009336A (ko) | 2018-05-16 | 2019-05-16 | 광 파이버 |
CN201980031689.5A CN112105979B (zh) | 2018-05-16 | 2019-05-16 | 光纤 |
JP2020519927A JP7173136B2 (ja) | 2018-05-16 | 2019-05-16 | 光ファイバ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018094592 | 2018-05-16 | ||
JP2018-094592 | 2018-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019221248A1 true WO2019221248A1 (ja) | 2019-11-21 |
Family
ID=68539732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/019577 WO2019221248A1 (ja) | 2018-05-16 | 2019-05-16 | 光ファイバ |
Country Status (5)
Country | Link |
---|---|
US (1) | US11927798B2 (ja) |
JP (1) | JP7173136B2 (ja) |
KR (1) | KR20210009336A (ja) |
CN (1) | CN112105979B (ja) |
WO (1) | WO2019221248A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022107811A1 (en) * | 2020-11-19 | 2022-05-27 | Japan Fine Coatings Co., Ltd. | Composition for forming coating layer of optical fiber and cured layer thereof, optical fiber having cured layer, and use thereof |
WO2022190693A1 (ja) * | 2021-03-11 | 2022-09-15 | 住友電気工業株式会社 | 光ファイバ及び光ファイバリボン |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3984973A4 (en) * | 2019-06-14 | 2022-07-27 | Sumitomo Electric Industries, Ltd. | COMPOSITION OF RESIN, OPTICAL FIBER AND METHOD FOR MANUFACTURING OPTICAL FIBER |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006251424A (ja) * | 2005-03-11 | 2006-09-21 | Jsr Corp | 液状硬化性樹脂組成物 |
US20120321265A1 (en) * | 2009-11-26 | 2012-12-20 | Lidia Terruzzi | Optical fiber with double coating |
US20180128970A1 (en) * | 2016-11-08 | 2018-05-10 | Sumitomo Electric Industries, Ltd. | Optical fiber |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1111986A (ja) * | 1997-04-25 | 1999-01-19 | Takeda Chem Ind Ltd | 光ファイバ被覆用樹脂組成物 |
US6584263B2 (en) * | 2000-07-26 | 2003-06-24 | Corning Incorporated | Optical fiber coating compositions and coated optical fibers |
KR100500191B1 (ko) * | 2002-09-10 | 2005-07-14 | 에스에스씨피 주식회사 | 자외선 경화성 광섬유 클래딩용 수지 조성물 |
JP2008007717A (ja) * | 2006-06-30 | 2008-01-17 | Toyobo Co Ltd | ウレタン変性アルキッド樹脂、水系ウレタン変性アルキッド塗料用樹脂組成物およびそれらの製造方法 |
KR101494057B1 (ko) * | 2009-10-09 | 2015-02-16 | 디에스엠 아이피 어셋츠 비.브이. | 슈퍼코팅으로 코팅된 단일-모드 광섬유 |
JP5788672B2 (ja) | 2009-12-28 | 2015-10-07 | Jsr株式会社 | 放射線硬化性樹脂組成物 |
JP5589618B2 (ja) | 2010-06-30 | 2014-09-17 | ぺんてる株式会社 | シャ−プペンシル |
US9057814B2 (en) * | 2013-03-28 | 2015-06-16 | Corning Incorporated | Large effective area fiber with low bending losses |
US9383511B2 (en) * | 2013-05-02 | 2016-07-05 | Corning Incorporated | Optical fiber with large mode field diameter and low microbending losses |
US9128245B2 (en) * | 2013-05-17 | 2015-09-08 | Corning Incorporated | Low cost, fast curing optical fiber coatings |
US9488774B2 (en) * | 2014-04-01 | 2016-11-08 | Corning Incorporated | Primary optical fiber coating composition containing non-radiation curable component |
US9618692B2 (en) * | 2014-07-10 | 2017-04-11 | Corning Incorporated | High chlorine content low attenuation optical fiber |
JP2017090486A (ja) * | 2015-11-02 | 2017-05-25 | 旭化成株式会社 | 感光性樹脂組成物、及び硬化レリーフパターンの製造方法 |
-
2019
- 2019-05-16 WO PCT/JP2019/019577 patent/WO2019221248A1/ja active Application Filing
- 2019-05-16 KR KR1020207035536A patent/KR20210009336A/ko not_active Application Discontinuation
- 2019-05-16 JP JP2020519927A patent/JP7173136B2/ja active Active
- 2019-05-16 CN CN201980031689.5A patent/CN112105979B/zh active Active
- 2019-05-16 US US17/054,589 patent/US11927798B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006251424A (ja) * | 2005-03-11 | 2006-09-21 | Jsr Corp | 液状硬化性樹脂組成物 |
US20120321265A1 (en) * | 2009-11-26 | 2012-12-20 | Lidia Terruzzi | Optical fiber with double coating |
US20180128970A1 (en) * | 2016-11-08 | 2018-05-10 | Sumitomo Electric Industries, Ltd. | Optical fiber |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022107811A1 (en) * | 2020-11-19 | 2022-05-27 | Japan Fine Coatings Co., Ltd. | Composition for forming coating layer of optical fiber and cured layer thereof, optical fiber having cured layer, and use thereof |
WO2022190693A1 (ja) * | 2021-03-11 | 2022-09-15 | 住友電気工業株式会社 | 光ファイバ及び光ファイバリボン |
Also Published As
Publication number | Publication date |
---|---|
JPWO2019221248A1 (ja) | 2021-07-15 |
US11927798B2 (en) | 2024-03-12 |
CN112105979A (zh) | 2020-12-18 |
JP7173136B2 (ja) | 2022-11-16 |
KR20210009336A (ko) | 2021-01-26 |
US20210181411A1 (en) | 2021-06-17 |
CN112105979B (zh) | 2022-11-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11603331B2 (en) | Optical fiber | |
US11629269B2 (en) | Resin composition, secondary coating material for optical fiber, and optical fiber | |
WO2019221248A1 (ja) | 光ファイバ | |
JP7192801B2 (ja) | 紫外線硬化型樹脂組成物及び光ファイバ | |
WO2020255570A1 (ja) | 光ファイバ | |
US20180095221A1 (en) | Optical fiber | |
WO2019159977A1 (ja) | 紫外線硬化型樹脂組成物及び光ファイバ | |
CN109705275B (zh) | 紫外线固化型树脂组合物以及光纤 | |
US11835756B2 (en) | Optical fiber with primary and secondary coating layers | |
US20200262749A1 (en) | Resin composition and optical fiber | |
US20190064433A1 (en) | Optical fiber | |
CN114867698A (zh) | 树脂组合物、光纤以及光纤的制造方法 | |
RU2780643C2 (ru) | Оптическое волокно | |
JP7484907B2 (ja) | 光ファイバ | |
WO2020255774A1 (ja) | 樹脂組成物、光ファイバ及び光ファイバの製造方法 | |
JP6943163B2 (ja) | 光ファイバ接続構造 | |
WO2022130855A1 (ja) | 樹脂組成物、光ファイバのセカンダリ被覆材料、光ファイバ及び光ファイバの製造方法 | |
JP2019053244A (ja) | 光ファイバ接続構造 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19804271 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2020519927 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20207035536 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19804271 Country of ref document: EP Kind code of ref document: A1 |