WO2024154414A1 - 光ファイバ着色被覆用の樹脂組成物、光ファイバ、および光ファイバリボン - Google Patents

光ファイバ着色被覆用の樹脂組成物、光ファイバ、および光ファイバリボン Download PDF

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WO2024154414A1
WO2024154414A1 PCT/JP2023/040101 JP2023040101W WO2024154414A1 WO 2024154414 A1 WO2024154414 A1 WO 2024154414A1 JP 2023040101 W JP2023040101 W JP 2023040101W WO 2024154414 A1 WO2024154414 A1 WO 2024154414A1
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Prior art keywords
resin layer
meth
acrylate
optical fiber
resin composition
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PCT/JP2023/040101
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English (en)
French (fr)
Japanese (ja)
Inventor
勝史 浜窪
矩章 岩口
未歩 池川
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Priority to JP2024571626A priority Critical patent/JPWO2024154414A1/ja
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    • 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
    • C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C03C25/285—Acrylic resins
    • 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
    • C03C25/465—Coatings containing composite materials
    • C03C25/475—Coatings containing composite materials containing colouring agents
    • 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
    • C03C25/62—Surface treatment of fibres or filaments made from glass, minerals or slags by application of electric or wave energy; by particle radiation or ion implantation
    • C03C25/6206—Electromagnetic waves
    • C03C25/6226—Ultraviolet
    • 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

Definitions

  • the present disclosure relates to a resin composition for colored coating of optical fibers, an optical fiber, and an optical fiber ribbon.
  • optical fibers have a coating resin layer to protect the glass fiber that transmits light.
  • the coating resin layer has, for example, a primary resin layer and a secondary resin layer.
  • the outermost layer of the coating resin layer is composed of a colored resin layer for identifying the optical fiber (see, for example, Patent Documents 1 to 3).
  • the resin composition for optical fiber coloring coating contains a photopolymerizable compound, a polymer dispersant having an acidic functional group, a photopolymerization initiator, and surface-treated titanium oxide particles, the content of the polymer dispersant being 0.01% by mass or more and 18% by mass or less based on the content of the surface-treated titanium oxide particles, and the acid value of the polymer dispersant being 25 mgKOH/g or more and 180 mgKOH/g or less.
  • FIG. 1 is a schematic cross-sectional view showing an example of an optical fiber according to the present embodiment.
  • FIG. 2 is a schematic cross-sectional view showing an example of the optical fiber according to the present embodiment.
  • FIG. 3 is a schematic cross-sectional view showing an example of an optical fiber ribbon according to the present embodiment.
  • the resin composition for forming the colored resin layer contains an inorganic pigment such as titanium oxide. Since the inorganic pigment has a larger specific gravity than the resin component, the inorganic pigment may settle during storage of the prepared resin composition. Therefore, the resin composition for colored coating of optical fiber is required to have excellent storage stability.
  • the present disclosure aims to provide a resin composition for colored coating of optical fibers that has excellent storage stability, an optical fiber, and an optical fiber ribbon.
  • a resin composition for coloring and coating optical fibers contains a photopolymerizable compound, a polymer dispersant having an acidic functional group, a photopolymerization initiator, and surface-treated titanium oxide particles, the content of the polymer dispersant being 0.01% by mass or more and 18% by mass or less based on the content of the surface-treated titanium oxide particles, and the acid value of the polymer dispersant being 25 mgKOH/g or more and 180 mgKOH/g or less.
  • Such a resin composition can have excellent storage stability by containing a polymer dispersant having an acidic functional group in a specific range and by setting the acid value of the polymer dispersant in a specific range.
  • the acidic functional group may be a phosphoric acid group or a carboxyl group in order to further improve the storage stability of the resin composition.
  • the surface-treated titanium oxide particles may have a surface treatment layer containing at least one selected from the group consisting of aluminum oxide, silicon dioxide, and zirconium dioxide.
  • the photopolymerizable compound may contain epoxy di(meth)acrylate in order to increase the strength of the resin layer.
  • An optical fiber according to one aspect of the present disclosure comprises a glass fiber including a core and a cladding, a primary resin layer that contacts the glass fiber and covers the glass fiber, a secondary resin layer that covers the primary resin layer, and a colored resin layer that covers the secondary resin layer, the colored resin layer containing a cured product of the resin composition described in any one of (1) to (4) above.
  • An optical fiber according to one aspect of the present disclosure comprises a glass fiber including a core and a cladding, a primary resin layer that contacts the glass fiber and covers the glass fiber, and a secondary resin layer that covers the primary resin layer, the secondary resin layer containing a cured product of the resin composition described in any one of (1) to (4) above.
  • an optical fiber ribbon In an optical fiber ribbon according to one aspect of the present disclosure, a plurality of optical fibers as described in (5) or (6) above are arranged in parallel and coated with a ribbon resin. Such an optical fiber ribbon is less likely to peel off when the optical fibers are removed, and the optical fibers can be easily identified.
  • the resin composition for coloring and coating an optical fiber contains a photopolymerizable compound, a polymer dispersant having an acidic functional group, a photopolymerization initiator, and surface-treated titanium oxide particles, and the content of the polymer dispersant is 0.01 mass % or more and 18 mass % or less based on the content of the surface-treated titanium oxide particles, and the acid value of the polymer dispersant is 25 mg KOH/g or more and 180 mg KOH/g or less.
  • the polymer dispersant adsorbs to the surface of the surface-treated titanium oxide particles via the acidic functional groups, dispersing the surface-treated titanium oxide particles in the resin composition and suppressing the aggregation of the surface-treated titanium oxide particles.
  • acidic functional groups examples include phosphate groups and carboxy groups.
  • the acidic functional group is a phosphate group or a carboxy group, the storage stability of the resin composition can be further improved.
  • the structure of the polymer dispersant may be a straight-chain type having an acidic functional group at the end, or a comb-shaped type having multiple acidic functional groups in the side chain. By using a comb-shaped polymer dispersant, the storage stability of the resin composition can be further improved.
  • the polymer dispersant may be a random copolymer, a block copolymer, or a graft copolymer.
  • polymeric dispersants examples include polyurethane-based dispersants, polyether-based dispersants, and polyester-based dispersants.
  • a comb-shaped polyester-based dispersant having a phosphate group on the side chain may be used.
  • the content of the polymer dispersant may be 0.05 mass% or more, 0.08 mass% or more, 0.1 mass% or more, or 0.3 mass% or more based on the content of the surface-treated titanium oxide particles, and may be 16 mass% or less, 15 mass% or less, or 12 mass% or less.
  • the acid value of the polymer dispersant may be 30 mgKOH/g or more, 35 mgKOH/g or more, 45 mgKOH/g or more, or 50 mgKOH/g or more, and may be 160 mgKOH/g or less, 150 mgKOH/g or less, 140 mgKOH/g or less, or 120 mgKOH/g or less.
  • the acid value of the polymer dispersant can be measured, for example, in accordance with DIN EN ISO 2114.
  • the photopolymerizable compound is not particularly limited, but may contain epoxy di(meth)acrylate from the viewpoint of increasing the strength of the resin layer.
  • epoxy di(meth)acrylate a reaction product of a diglycidyl ether compound having a bisphenol skeleton and a compound having a (meth)acryloyl group such as (meth)acrylic acid can be used.
  • epoxy di(meth)acrylates examples include (meth)acrylic acid adducts of bisphenol A diglycidyl ether, (meth)acrylic acid adducts of bisphenol AF diglycidyl ether, and (meth)acrylic acid adducts of bisphenol F diglycidyl ether.
  • the content of the epoxy di(meth)acrylate may be 30 parts by mass or more, 40 parts by mass or more, or 45 parts by mass or more, and may be 70 parts by mass or less, 65 parts by mass or less, or 60 parts by mass or less, relative to 100 parts by mass of the total amount of the photopolymerizable compound.
  • the photopolymerizable compound may further contain a urethane (meth)acrylate from the viewpoint of adjusting the Young's modulus of the resin layer.
  • a urethane (meth)acrylate for example, a urethane oligomer obtained by reacting a polyol compound, a polyisocyanate compound, and a hydroxyl group-containing (meth)acrylate compound can be used.
  • the urethane (meth)acrylate may be used alone or in combination of two or more types.
  • polyol compounds include polytetramethylene glycol, polypropylene glycol, and bisphenol A-ethylene oxide addition diol.
  • polyisocyanate compounds include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane 4,4'-diisocyanate.
  • hydroxyl group-containing (meth)acrylate compounds include 2-hydroxyethyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 1,6-hexanediol mono(meth)acrylate, pentaerythritol tri(meth)acrylate, 2-hydroxypropyl (meth)acrylate, and tripropylene glycol mono(meth)acrylate.
  • the number average molecular weight (Mn) of the polyol compound may be 300 or more and 3000 or less, 400 or more and 3000 or less, or 500 or more and 2500 or less.
  • Organotin compounds are generally used as catalysts in the synthesis of urethane (meth)acrylates.
  • organotin compounds include dibutyltin dilaurate, dibutyltin diacetate, dibutyltin maleate, dibutyltin bis(2-ethylhexyl mercaptoacetate), dibutyltin bis(isooctyl mercaptoacetate) and dibutyltin oxide. From the standpoint of easy availability or catalytic performance, dibutyltin dilaurate or dibutyltin diacetate may be used as the catalyst.
  • a lower alcohol having 5 or less carbon atoms may be used.
  • lower alcohols include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, 2-methyl-2-butanol, 3-methyl-2-butanol, and 2,2-dimethyl-1-propanol.
  • the photopolymerizable compound according to this embodiment may further contain a photopolymerizable compound (hereinafter referred to as "monomer") other than epoxy di(meth)acrylate.
  • a photopolymerizable compound hereinafter referred to as "monomer”
  • a monofunctional monomer having one polymerizable group or a polyfunctional monomer having two or more polymerizable groups can be used. Two or more types of monomers may be mixed and used.
  • monofunctional monomers 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, 2-phenoxyethyl (meth)acrylate, 3-phenoxyethyl (meth)acrylate, (Meth)acrylate mono
  • carboxy group-containing monomers such as N-(meth)acryloylmorpholine, N-vinylpyrrolidone, N-vinylcaprolactam, N-(meth)acryloylpiperidine, N-(meth)acryloylpyrrolidine, 3-(3-pyridine)propyl(meth)acrylate, and cyclic trimethylolpropane formal acrylate; heterocycle-containing monomers such as maleimide, N-cyclohexylmaleimide, and N-phenylmaleimide; (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, N-hexyl(meth)acrylamide, N Amide monomers such as N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-butyl(meth)acrylamide, N-methylol(meth)acrylamide, and N-methylolpropane(meth
  • polyfunctional monomers examples include polyethylene glycol di(meth)acrylate, isocyanuric acid ethylene oxide modified di(meth)acrylate, ethylene oxide modified bisphenol F di(meth)acrylate, ethylene oxide modified bisphenol A di(meth)acrylate, polypropylene glycol di(meth)acrylate, propylene oxide modified bisphenol A di(meth)acrylate, propylene oxide modified neopentyl glycol di(meth)acrylate, polytetraethylene glycol di(meth)acrylate, p) acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, 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 di(me
  • the photopolymerizable compound according to this embodiment may contain an alkylene oxide-modified polyfunctional monomer from the viewpoint of adjusting the Young's modulus of the resin layer.
  • the alkylene oxide-modified polyfunctional monomer may have at least one selected from the group consisting of an ethylene oxide (EO) chain and a propylene oxide (PO) chain.
  • EO ethylene oxide
  • PO propylene oxide
  • the ethylene oxide chain can be represented as "(EO)n” and the propylene oxide chain as "(PO)n".
  • n is an integer of 1 or more, and may be 2 or more or 3 or more, and may be 30 or less, 25 or less, or 20 or less.
  • alkylene oxide modified di(meth)acrylates examples include polyethylene glycol di(meth)acrylate, isocyanuric acid ethylene oxide modified di(meth)acrylate, ethylene oxide modified bisphenol F di(meth)acrylate, ethylene oxide modified bisphenol A di(meth)acrylate polypropylene glycol di(meth)acrylate, propylene oxide modified bisphenol A di(meth)acrylate, and propylene oxide modified neopentyl glycol di(meth)acrylate.
  • alkylene oxide modified tri(meth)acrylates include trimethylolpropane tri(meth)acrylate, trimethyloloctane tri(meth)acrylate, trimethylolpropane polyethoxy tri(meth)acrylate, trimethylolpropane polypropoxy tri(meth)acrylate, trimethylolpropane polyethoxy polypropoxy tri(meth)acrylate, tris[(meth)acryloyloxyethyl]isocyanurate, and pentaerythritol tri(meth)acrylate.
  • the photopolymerization initiator can be appropriately selected from known radical photopolymerization initiators.
  • photopolymerization initiators include 1-hydroxycyclohexyl phenyl ketone (Omnirad 184, manufactured by IGM Resins), 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, IGM Resins), and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide (Omnirad 819, IGM Resins).
  • the content of the photopolymerization initiator may be 1 part by mass or more and 10 parts by mass or less, 2 parts by mass or more and 8 parts by mass or less, or 3 parts by mass or more and 7 parts by mass or less, relative to 100 parts by mass of the total amount of the photopolymerizable compounds.
  • the resin composition according to this embodiment contains surface-treated titanium oxide particles in order to color the resin layer.
  • the surface-treated titanium oxide particles are particles in which titanium oxide has been surface-treated with an inorganic substance, and have excellent dispersibility in the resin composition.
  • Examples of inorganic substances used for surface treatment include aluminum oxide, silicon dioxide, and zirconium dioxide.
  • a surface treatment layer containing at least one selected from the group consisting of aluminum oxide, silicon dioxide, and zirconium dioxide the dispersibility can be further improved.
  • the surface treatment layer may be formed on at least a portion of the surface of the titanium oxide particles, or may be formed on the entire surface of the titanium oxide particles.
  • the surface treatment layer is formed by surface treatment of the titanium oxide particles.
  • the amount of the surface treatment layer in the surface-treated titanium oxide particles may be 1 mass% or more, 1.5 mass% or more, or 2 mass% or more from the viewpoint of further improving dispersibility, and may be 10 mass% or less, 9 mass% or less, or 8 mass% or less from the viewpoint of increasing hiding power.
  • the amount of the surface treatment layer can be calculated by measuring the amount of titanium element and inorganic elements other than titanium contained in the surface-treated titanium oxide particles using inductively coupled mass spectrometry (ICP-MS).
  • the average primary particle size of the surface-treated titanium oxide particles may be 300 nm or less, 295 nm or less, or 290 nm or less, from the viewpoint of improving the lateral pressure resistance of the coating resin layer.
  • the average primary particle size of the surface-treated titanium oxide particles may be 100 nm or more, 150 nm or more, or 200 nm or more, or may be 200 nm or more and 300 nm or less, from the viewpoint of improving hiding power.
  • the average primary particle size can be measured, for example, by image analysis of electron microscope photographs, light scattering method, BET method, etc.
  • the content of the surface-treated titanium oxide particles may be 0.6 mass% or more, 1 mass% or more, 2 mass% or more, or 3 mass% or more based on the total amount of the resin composition from the viewpoint of improving the visibility of the resin layer.
  • the content of the surface-treated titanium oxide particles may be 20 mass% or less, 15 mass% or less, 10 mass% or less, or 8 mass% or less based on the total amount of the resin composition from the viewpoint of improving the curability of the resin composition.
  • the resin composition according to this embodiment may further contain a silane coupling agent, a leveling agent, an antifoaming agent, an antioxidant, a sensitizer, etc.
  • silane coupling agent is not particularly limited as long as it does not interfere with the curing of the resin composition.
  • silane coupling agents include tetramethyl silicate, tetraethyl silicate, mercaptopropyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris( ⁇ -methoxy-ethoxy)silane, ⁇ -(3,4-epoxycyclohexyl)-ethyltrimethoxysilane, dimethoxydimethylsilane, diethoxydimethylsilane, 3-acryloxypropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropylmethyldiethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, N-( ⁇ -aminoethyl)- ⁇ -aminopropyltrimethoxysilane, N
  • the viscosity of the resin composition according to this embodiment at 25°C may be 1000 mPa ⁇ s or more, 1500 mPa ⁇ s or more, or 2000 mPa ⁇ s or more from the viewpoint of storage stability, and may be less than 10000 mPa ⁇ s, 8000 mPa ⁇ s or less, or 6000 mPa ⁇ s or less from the viewpoint of coatability.
  • the Young's modulus of the resin film may be 500 MPa or more, 600 MPa or more, or 700 MPa or more at 23°C. From the viewpoint of forming a resin layer with excellent toughness, the Young's modulus of the resin film may be 1500 MPa or less, 1300 MPa or less, or 1200 MPa or less at 23°C.
  • the resin composition according to this embodiment can be suitably used as a colored coating material for optical fibers.
  • the outermost layer of the coating resin layer using a colored coating material containing the resin composition according to this embodiment, the single-core separation property of the optical fiber can be improved.
  • Fig. 1 is a schematic cross-sectional view showing the configuration of an optical fiber according to an embodiment.
  • the optical fiber 1 of the present embodiment includes a glass fiber 10 and a coating resin layer 20 that contacts the glass fiber 10 and covers the outer periphery of the glass fiber 10.
  • the glass fiber 10 is a light-guiding optical transmission body that transmits light introduced into the optical fiber 1.
  • the glass fiber 10 is a glass member, and is configured, for example, with silica (SiO 2 ) glass as a base material (main component).
  • the glass fiber 10 includes a core 12 and a clad 14 that covers the core 12.
  • the glass fiber 10 transmits light introduced into the optical fiber 1.
  • the core 12 is provided, for example, in a region that includes the central axis of the glass fiber 10.
  • the core 12 is made of, for example, pure SiO 2 glass, or SiO 2 glass containing germanium dioxide (GeO 2 ), fluorine element, or the like.
  • the clad 14 is provided in a region that surrounds the core 12.
  • the clad 14 has a refractive index lower than that of the core 12.
  • the clad 14 is made of, for example, pure SiO 2 glass, or SiO 2 glass to which fluorine element is added.
  • the outer diameter of the glass fiber 10 is about 100 ⁇ m to 125 ⁇ m, and the diameter of the core 12 constituting the glass fiber 10 is about 7 ⁇ m to 15 ⁇ m.
  • the coating resin layer 20 is an ultraviolet-curable resin layer that covers the clad 14.
  • the coating resin layer 20 includes a primary resin layer 22 that coats the outer periphery of the glass fiber 10, a secondary resin layer 24 that coats the outer periphery of the primary resin layer 22, and a colored resin layer 26 that coats the outer periphery of the secondary resin layer 24.
  • the primary resin layer 22 is in contact with the outer periphery of the clad 14 and coats the entire clad 14.
  • the secondary resin layer 24 is in contact with the outer periphery of the primary resin layer 22 and coats the entire primary resin layer 22.
  • the colored resin layer 26 is in contact with the outer periphery of the secondary resin layer 24 and coats the outer periphery of the secondary resin layer 24.
  • the thickness of the primary resin layer 22 is, for example, 10 ⁇ m or more and 50 ⁇ m or less.
  • the thickness of the secondary resin layer 24 is, for example, 10 ⁇ m or more and 40 ⁇ m or less.
  • the thickness of the colored resin layer 26 is, for example, 3 ⁇ m or more and 10 ⁇ m or less.
  • the primary resin layer 22 may be formed using a resin composition for primary resin layers that is conventionally known.
  • the primary resin layer 22 may be formed, for example, by curing a resin composition that includes urethane (meth)acrylate, a monomer, a photopolymerization initiator, and a silane coupling agent.
  • the secondary resin layer 24 may be formed using a conventionally known resin composition for secondary resin layers.
  • the secondary resin layer 24 can be formed, for example, by curing a resin composition containing urethane (meth)acrylate, a monomer, and a photopolymerization initiator.
  • the resin composition according to this embodiment can be applied to the colored resin layer 26.
  • the colored resin layer 26 can be formed by curing the resin composition.
  • the colored resin layer 26 contains the cured product of the resin composition according to this embodiment, thereby improving the single-core separation property of the optical fiber.
  • the colored resin layer 26 and the secondary resin layer 24 are less likely to peel off when the ribbon material is removed.
  • FIG. 2 is a schematic cross-sectional view showing the configuration of an optical fiber according to one embodiment.
  • the optical fiber 1A includes a glass fiber 10 and a coating resin layer 20A that contacts the glass fiber 10 and covers the outer periphery of the glass fiber 10.
  • the coating resin layer 20A includes a primary resin layer 22 and a secondary resin layer 24.
  • the resin composition according to this embodiment can be applied to the secondary resin layer 24.
  • the secondary resin layer 24 can be formed by curing the resin composition.
  • the secondary resin layer 24 functions as a colored secondary resin layer.
  • the secondary resin layer 24 contains a cured product of the resin composition according to this embodiment, thereby improving the single-core separation property of the optical fiber.
  • optical fiber ribbon The optical fiber according to this embodiment can be used to fabricate an optical fiber ribbon, which is made up of a plurality of the optical fibers arranged in parallel and coated with a ribbon resin.
  • FIG. 3 is a schematic cross-sectional view showing an optical fiber ribbon according to this embodiment.
  • the optical fiber ribbon 100 has a plurality of optical fibers 1 and a connecting resin layer 40 in which the optical fibers 1 are coated and connected with a ribbon resin.
  • the connecting resin layer 40 is formed from a ribbon resin.
  • four optical fibers are shown as an example, but the number is not particularly limited.
  • the ribbon resin resin materials generally known as ribbon materials can be used.
  • the ribbon resin may contain a thermosetting resin such as silicone resin, epoxy resin, or urethane resin, or an ultraviolet-curing resin such as epoxy acrylate, urethane acrylate, or polyester acrylate.
  • the optical fiber ribbon of this embodiment uses the above optical fiber, so that the optical fiber can be easily identified without color peeling when removing the connecting resin layer from the optical fiber ribbon to extract the optical fiber.
  • Photopolymerizable Compound As photopolymerizable compounds, bisphenol A epoxy diacrylate (EA), polypropylene glycol diacrylate (PPGDA), and the following alkylene oxide modified acrylate compound were prepared.
  • TMP(EO) 3TA Trimethylolpropane EO adduct triacrylate (EO number: 3)
  • TMP(EO) 15 TA Trimethylolpropane EO adduct triacrylate (EO number: 15)
  • BPA(EO) 30 DA EO-modified bisphenol A di(meth)acrylate (EO number: 30)
  • Photopolymerization initiator As photoinitiators, 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Omnirad TPO) and 1-hydroxycyclohexyl phenyl ketone (Omnirad 184) were prepared.
  • Surface-treated titanium oxide particles having a surface treatment layer containing aluminum oxide (Al 2 O 3 ) were prepared as surface-treated titanium oxide particles.
  • the average primary particle size of the surface-treated titanium oxide particles was 200 to 300 nm, and the amount of Al 2 O 3 calculated by ICP-MS measurement was 2.5 mass %.
  • Test Examples 1 to 7 Resin compositions were prepared by mixing the photopolymerizable compound and photopolymerization initiator in the amounts (parts by mass) shown in Table 2 with the polymer dispersant and surface-treated titanium oxide particles in the contents (% by mass) shown in Table 2.
  • the content of the polymer dispersant is a value based on the content of the surface-treated titanium oxide particles
  • the content of the surface-treated titanium oxide particles is a value based on the total amount of the resin composition.
  • Test Examples 1 to 6 correspond to Examples
  • Test Example 7 corresponds to a Comparative Example.
  • Test Examples 8 to 13 Resin compositions were prepared by mixing the photopolymerizable compound and photopolymerization initiator in the amounts (parts by mass) shown in Table 3 with the polymer dispersant and surface-treated titanium oxide particles in the contents (% by mass) shown in Table 3. Test Examples 8 to 11 correspond to Examples, and Test Examples 12 and 13 correspond to Comparative Examples.
  • viscosity The viscosity of the resin composition at 25° C. was measured using a rheometer ("MCR-102" manufactured by Anton Paar) under conditions of cone plate CP25-2 and a shear rate of 10 s ⁇ 1 .
  • the resin composition was applied onto a polyethylene terephthalate (PET) film using a spin coater, and then cured using an electrodeless UV lamp system (Heraeus's "VPS600 (D bulb)") at 1000 ⁇ 100 mJ/ cm2 to form a resin layer with a thickness of 50 ⁇ 5 ⁇ m on the PET film.
  • the resin layer was peeled off from the PET film to obtain a resin film.
  • the resin film was punched out into a dumbbell shape conforming to JIS K 7127 Type 5, and pulled using a tensile tester at 23 ⁇ 2°C, 50 ⁇ 10% RH, with a pulling speed of 1 mm/min and a gauge distance of 25 mm, to obtain a stress-strain curve.
  • the film Young's modulus was calculated using the 2.5% secant line.
  • Resin composition for primary resin layer A urethane acrylate obtained by reacting polypropylene glycol having a molecular weight of 4000, isophorone diisocyanate, hydroxyethyl acrylate, and methanol was prepared. 75 parts by mass of this urethane acrylate, 12 parts by mass of nonylphenol EO-modified acrylate, 6 parts by mass of N-vinyl caprolactam, 2 parts by mass of 1,6-hexanediol diacrylate, 1 part by mass of Omnirad TPO, and 1 part by mass of 3-mercaptopropyltrimethoxysilane were mixed to prepare a resin composition P.
  • Resin composition for secondary resin layer A urethane acrylate obtained by reacting polypropylene glycol having a molecular weight of 600, 2,4-tolylene diisocyanate, and 2-hydroxyethyl acrylate was prepared. Resin composition S was prepared by mixing 40 parts by mass of this urethane acrylate, 35 parts by mass of isobornyl acrylate, 24 parts by mass of epoxy acrylate which is an acrylic acid adduct of bisphenol A diglycidyl ether, 1 part by mass of Omnirad TPO, and 1 part by mass of Omnirad 184.
  • Urethane acrylate A obtained by reacting bisphenol A-ethylene oxide adduct diol, tolylene diisocyanate, and hydroxyethyl acrylate
  • urethane acrylate B obtained by reacting polytetramethylene glycol, tolylene diisocyanate, and hydroxyethyl acrylate were prepared.
  • Resin composition R was prepared by mixing 18 parts by weight of urethane acrylate A, 10 parts by weight of urethane acrylate B, 15 parts by weight of tricyclodecane dimethanol diacrylate, 10 parts by weight of N-vinylpyrrolidone, 10 parts by weight of isobornyl acrylate, 5 parts by weight of bisphenol A-ethylene oxide adduct diol diacrylate, 0.7 parts by weight of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one (Omnirad 907), and 1.3 parts by weight of Omnirad TPO.
  • a primary resin layer having a thickness of 17.5 ⁇ m was formed on the outer circumference of a glass fiber having a diameter of 125 ⁇ m, which was composed of a core and a clad, using resin composition P, and a secondary resin layer having a thickness of 15 ⁇ m was further formed on the outer circumference of the primary resin layer using resin composition S, to produce an optical fiber.
  • a colored resin layer having a thickness of 5 ⁇ m was formed on the outer circumference of the secondary resin layer using the resin compositions of Test Examples 1 to 13 while the optical fiber was reeled out using a coloring machine, thereby producing an optical fiber having a diameter of 200 ⁇ m and a colored resin layer (hereinafter referred to as "colored optical fiber").
  • the linear speed when forming each resin layer was 1500 m/min.

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  • Electromagnetism (AREA)
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  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
PCT/JP2023/040101 2023-01-18 2023-11-07 光ファイバ着色被覆用の樹脂組成物、光ファイバ、および光ファイバリボン Ceased WO2024154414A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016070966A (ja) * 2014-09-26 2016-05-09 住友電気工業株式会社 光ファイバ心線及び光ファイバテープ心線
WO2016088801A1 (ja) * 2014-12-03 2016-06-09 住友電気工業株式会社 光ファイバ心線及び光ファイバテープ心線
JP2017095531A (ja) * 2015-11-18 2017-06-01 サカタインクス株式会社 光硬化型インクジェット印刷用インク組成物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016070966A (ja) * 2014-09-26 2016-05-09 住友電気工業株式会社 光ファイバ心線及び光ファイバテープ心線
WO2016088801A1 (ja) * 2014-12-03 2016-06-09 住友電気工業株式会社 光ファイバ心線及び光ファイバテープ心線
JP2017095531A (ja) * 2015-11-18 2017-06-01 サカタインクス株式会社 光硬化型インクジェット印刷用インク組成物

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