WO2022138119A1 - 樹脂組成物、樹脂組成物の製造方法、光ファイバ、光ファイバの製造方法、光ファイバリボン、及び光ファイバケーブル - Google Patents
樹脂組成物、樹脂組成物の製造方法、光ファイバ、光ファイバの製造方法、光ファイバリボン、及び光ファイバケーブル Download PDFInfo
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- WO2022138119A1 WO2022138119A1 PCT/JP2021/044777 JP2021044777W WO2022138119A1 WO 2022138119 A1 WO2022138119 A1 WO 2022138119A1 JP 2021044777 W JP2021044777 W JP 2021044777W WO 2022138119 A1 WO2022138119 A1 WO 2022138119A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- meth
- acrylate
- optical fiber
- resin composition
- urethane
- Prior art date
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 165
- 239000011342 resin composition Substances 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 201
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 150000001346 alkyl aryl ethers Chemical class 0.000 claims abstract description 37
- 150000002009 diols Chemical class 0.000 claims abstract description 34
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 30
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 22
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 239000003999 initiator Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims description 133
- 239000011347 resin Substances 0.000 claims description 133
- -1 polyoxypropylene monobutyl ether Polymers 0.000 claims description 54
- 239000011248 coating agent Substances 0.000 claims description 35
- 238000000576 coating method Methods 0.000 claims description 35
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 34
- 239000003365 glass fiber Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 239000007795 chemical reaction product Substances 0.000 claims description 16
- 229920001451 polypropylene glycol Polymers 0.000 claims description 14
- 230000002194 synthesizing effect Effects 0.000 claims description 9
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims 1
- 230000037452 priming Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 97
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 29
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 17
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 12
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 12
- 239000012975 dibutyltin dilaurate Substances 0.000 description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000000178 monomer Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 229920001223 polyethylene glycol Polymers 0.000 description 7
- 229910000077 silane Inorganic materials 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 6
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 5
- 239000002202 Polyethylene glycol Substances 0.000 description 5
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 5
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 5
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- 239000006087 Silane Coupling Agent Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 3
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 3
- DPNXHTDWGGVXID-UHFFFAOYSA-N 2-isocyanatoethyl prop-2-enoate Chemical compound C=CC(=O)OCCN=C=O DPNXHTDWGGVXID-UHFFFAOYSA-N 0.000 description 3
- QPRQEDXDYOZYLA-UHFFFAOYSA-N 2-methylbutan-1-ol Chemical compound CCC(C)CO QPRQEDXDYOZYLA-UHFFFAOYSA-N 0.000 description 3
- MSXVEPNJUHWQHW-UHFFFAOYSA-N 2-methylbutan-2-ol Chemical compound CCC(C)(C)O MSXVEPNJUHWQHW-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 2
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 2
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 2
- ZFGOPJASRDDARH-UHFFFAOYSA-N 3-[[10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1h-cyclopenta[a]phenanthren-3-yl]oxy]-10,13-dimethyl-17-(6-methylheptan-2-yl)-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1h-cyclopenta[a]phenanthrene Chemical compound C12CCC3(C)C(C(C)CCCC(C)C)CCC3C2CC=C(C2)C1(C)CCC2OC1CC2=CCC3C4CCC(C(C)CCCC(C)C)C4(C)CCC3C2(C)CC1 ZFGOPJASRDDARH-UHFFFAOYSA-N 0.000 description 2
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- KBQVDAIIQCXKPI-UHFFFAOYSA-N 3-trimethoxysilylpropyl prop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C=C KBQVDAIIQCXKPI-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
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- 239000004593 Epoxy Substances 0.000 description 2
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- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 2
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
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- GJBXIPOYHVMPQJ-UHFFFAOYSA-N hexadecane-1,16-diol Chemical compound OCCCCCCCCCCCCCCCCO GJBXIPOYHVMPQJ-UHFFFAOYSA-N 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 2
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- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 1
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- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 1
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- VZXPHDGHQXLXJC-UHFFFAOYSA-N 1,6-diisocyanato-5,6-dimethylheptane Chemical compound O=C=NC(C)(C)C(C)CCCCN=C=O VZXPHDGHQXLXJC-UHFFFAOYSA-N 0.000 description 1
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- GGSRTHRSSCWGGK-UHFFFAOYSA-L 2,2-dibutyl-5-hydroxy-1,3,2-dioxastannepane-4,7-dione Chemical compound CCCC[Sn]1(CCCC)OC(=O)CC(O)C(=O)O1 GGSRTHRSSCWGGK-UHFFFAOYSA-L 0.000 description 1
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- CZZVAVMGKRNEAT-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diol;3-hydroxy-2,2-dimethylpropanoic acid Chemical compound OCC(C)(C)CO.OCC(C)(C)C(O)=O CZZVAVMGKRNEAT-UHFFFAOYSA-N 0.000 description 1
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- PUBNJSZGANKUGX-UHFFFAOYSA-N 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=C(C)C=C1 PUBNJSZGANKUGX-UHFFFAOYSA-N 0.000 description 1
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- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
- PRIUALOJYOZZOJ-UHFFFAOYSA-L 2-ethylhexyl 2-[dibutyl-[2-(2-ethylhexoxy)-2-oxoethyl]sulfanylstannyl]sulfanylacetate Chemical compound CCCCC(CC)COC(=O)CS[Sn](CCCC)(CCCC)SCC(=O)OCC(CC)CCCC PRIUALOJYOZZOJ-UHFFFAOYSA-L 0.000 description 1
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- QISZCVLALJOROC-UHFFFAOYSA-N 3-(2-hydroxyethyl)-4-(2-prop-2-enoyloxyethyl)phthalic acid Chemical compound OCCC1=C(CCOC(=O)C=C)C=CC(C(O)=O)=C1C(O)=O QISZCVLALJOROC-UHFFFAOYSA-N 0.000 description 1
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- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 description 1
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- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
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- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- 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
- G02B6/4402—Optical cables with one single optical waveguide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
- G02B6/4404—Multi-podded
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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
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
Definitions
- the present disclosure relates to a resin composition for primary coating of an optical fiber, a method for producing a resin composition, an optical fiber, a method for producing an optical fiber, an optical fiber ribbon, and an optical fiber cable.
- the optical fiber includes a coating resin layer for protecting the glass fiber which is an optical transmitter.
- the coating resin layer is composed of, for example, two layers, a primary resin layer in contact with the glass fiber and a secondary resin layer formed on the outer layer of the primary resin layer.
- an external force lateral pressure
- the Young's modulus of the primary resin layer is lowered and the Young's modulus of the secondary resin layer is increased in order to improve the microbend resistance of the optical fiber.
- Patent Documents 1 to 5 describe resin compositions for primary coating containing urethane (meth) acrylate, which is a reaction product of polyol, diisocyanate, and hydroxyl group-containing (meth) acrylate.
- the resin composition for the primary coating of the optical fiber contains a photopolymerizable compound containing a bifunctional urethane (meth) acrylate and a monofunctional urethane (meth) acrylate, and a photopolymerization initiator.
- the bifunctional urethane (meth) acrylate is a reaction product of a diol, a diisocyanate, and a hydroxyl group-containing (meth) acrylate
- the monofunctional urethane (meth) acrylate is a polyoxyalkylene monoalkyl ether, a diisocyanate, and the like. It is a reaction product with a hydroxyl group-containing (meth) acrylate, or a reaction product of a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth) acrylate.
- 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 optical fiber ribbon according to an embodiment.
- FIG. 3 is a schematic cross-sectional view showing an optical fiber ribbon according to an embodiment.
- FIG. 4 is a plan view showing the appearance of the optical fiber ribbon according to the embodiment.
- FIG. 5 is a schematic cross-sectional view showing an optical fiber cable according to an embodiment.
- FIG. 6 is a schematic cross-sectional view showing an optical fiber cable according to an embodiment.
- the breaking strength tends to decrease as the Young's modulus decreases, defects (voids) occur in the primary resin layer, and transmission loss tends to increase particularly at low temperatures.
- the present disclosure provides a resin composition capable of forming a resin layer suitable for the primary coating of an optical fiber, which has both a low Young's modulus and a high breaking strength, and an optical fiber having excellent microbend resistance and low temperature characteristics.
- the purpose is.
- a resin composition capable of forming a resin layer suitable for the primary coating of an optical fiber having both a low Young's modulus and a high breaking strength, and an optical fiber having excellent microbend resistance and low temperature characteristics are provided. Can be provided.
- the resin composition for primary coating of an optical fiber contains a photopolymerizable compound containing a bifunctional urethane (meth) acrylate and a monofunctional urethane (meth) acrylate, and a photopolymerization initiator.
- the bifunctional urethane (meth) acrylate is a reaction product of a diol, a diisocyanate, and a hydroxyl group-containing (meth) acrylate
- the monofunctional urethane (meth) acrylate is a polyoxyalkylene monoalkyl ether, a diisocyanate, and a hydroxyl group. It is a reaction product with a contained (meth) acrylate, or a reaction product of a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth) acrylate.
- Such a resin composition can achieve both a low Young's modulus and a high breaking strength and does not cause defects in the primary resin layer, it is possible to form a resin layer suitable for the primary coating of an optical fiber. It is possible to improve the microbend resistance and low temperature characteristics of the fiber.
- the number average molecular weight of the diol may be 2500 or more and 20000 or less.
- the number average molecular weight of the diol may be 6000 or more and 20000 or less in order to further increase the breaking strength of the primary resin layer.
- the diol may be polypropylene glycol because it is easy to adjust the Young's modulus of the primary resin composition.
- the number average molecular weight of the polyoxyalkylene monoalkyl ether may be 2000 or more and 10000 or less.
- the polyoxyalkylene monoalkyl ether may be a polyoxypropylene monobutyl ether in order to enhance compatibility with other components.
- the content of the monofunctional urethane (meth) acrylate may be 10 parts by mass or more and 70 parts by mass or less based on 100 parts by mass of the total amount of the resin composition. good.
- the photopolymerizable compound may further contain an N-vinyl compound.
- the method for producing a resin composition includes a step of synthesizing a bifunctional urethane (meth) acrylate by a reaction of a diol, a diisocyanate, and a hydroxyl group-containing (meth) acrylate, and a polyoxyalkylene monoalkyl.
- a photopolymerizable compound containing a bifunctional urethane (meth) acrylate and a monofunctional urethane (meth) acrylate with a photopolymerization initiator to prepare a resin composition.
- the optical fiber according to one aspect of the present disclosure includes a glass fiber including a core and a clad, a primary resin layer in contact with the glass fiber and covering the glass fiber, and a secondary resin layer covering the primary resin layer.
- the resin layer contains a cured product of the above resin composition.
- Such an optical fiber is excellent in microbend resistance and low temperature characteristics without causing defects in the primary resin layer.
- the method for producing an optical fiber according to one aspect of the present disclosure includes a coating step of applying the above resin composition to the outer periphery of a glass fiber including a core and a clad, and a coating step of applying ultraviolet rays after the coating step to apply the resin composition. Including a curing step of curing. This makes it possible to manufacture an optical fiber having excellent microbend resistance and low temperature characteristics.
- optical fiber ribbon a plurality of the above optical fibers are arranged in parallel and coated with a ribbon resin.
- Such an optical fiber ribbon is excellent in microbend resistance and low temperature characteristics, and can be filled in an optical fiber cable at a high density.
- the optical fiber ribbon is housed in the cable.
- the optical fiber cable according to the present disclosure may have a mode in which a plurality of the above optical fibers are housed in the cable.
- the optical fiber cable provided with the optical fiber or the optical fiber ribbon according to the present embodiment is excellent in microbend resistance and low temperature characteristics.
- the resin composition according to the present embodiment contains a photopolymerizable compound containing a bifunctional urethane (meth) acrylate and a monofunctional urethane (meth) acrylate, and a photopolymerization initiator.
- the bifunctional urethane (meth) acrylate according to the present embodiment is a reaction product of a diol, a diisocyanate, and a hydroxyl group-containing (meth) acrylate.
- Bifunctional urethane (meth) acrylate is a component having two (meth) acryloyl groups.
- the urethane (meth) acrylate containing a bifunctional urethane (meth) acrylate as a main component may be referred to as “urethane (meth) acrylate (A)”.
- the bifunctional urethane (meth) acrylate can be represented by the following formula (1).
- A represents a residue of a hydroxyl group-containing (meth) acrylate
- U represents a urethane bond
- I represents a residue of diisocyanate
- P2 represents a residue of diol
- n is an integer of 1 or more. ..
- Examples of the diol include a polyether diol, a polyester diol, a polycaprolactone diol, a polycarbonate diol, a polybutadiene diol, and a bisphenol A / ethylene oxide-added diol.
- Examples of the polyether diol include polytetramethylene glycol (PTMG), polyethylene glycol (PEG), polypropylene glycol (PPG), a block polymer of PTMG-PPG-PTMG, and a block copolymer of PEG-PPG-PEG. Examples thereof include a random copolymer of PTMG-PEG and a random copolymer of PTMG-PPG. Since it is easy to adjust the Young's modulus and breaking strength of the resin layer, it is preferable to use polypropylene glycol as the diol.
- the number average molecular weight (Mn) of the diol may be 2500 or more and 20000 or less, 4000 or more and 20000 or less, or 5000 or more and 20000 or less. From the viewpoint of further increasing the breaking strength of the primary resin layer, the Mn of the diol may be 6000 or more and 20000 or less, 8000 or more and 19000 or less, or 10000 or more and 18500 or less.
- diisocyanate examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, 1, Examples thereof include 5-naphthalenedi isocyanate, norbornene diisocyanate, 1,5-pentamethylene diisocyanate, tetramethylxylylene diisocyanate, and trimethylhexamethylene diisocyanate.
- Examples of the hydroxyl group-containing (meth) acrylate include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, caprolactone (meth) acrylate, and 2-hydroxy-3-.
- Examples thereof include propandi (meth) acrylate and pentaerythritol tri (meth) acrylate. From the viewpoint of reactivity, 2-hydroxyethyl acrylate is preferable.
- the urethane (meth) acrylate (A) may further contain a reaction product of a diol, a diisocyanate, a hydroxyl group-containing (meth) acrylate, and an active hydrogen-containing silane compound.
- a group based on an active hydrogen-containing silane compound into urethane (meth) acrylate, the proportion of (meth) acryloyl group, which is a photopolymerizable group, can be reduced, and the Young's modulus of the primary resin layer can be reduced. , The adhesion with the glass fiber can be improved.
- Examples of the active hydrogen-containing silane compound include N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, and 3-aminopropyltrimethoxy.
- the urethane (meth) acrylate (A) may further contain a reaction product of a diol, a diisocyanate, a hydroxyl group-containing (meth) acrylate, and a monohydric alcohol from the viewpoint of adjusting the Young's modulus of the primary resin layer.
- Examples of the monohydric alcohol include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, 1-pentanol, 2-pentanol and 3-pentanol. , 2-Methyl-1-butanol, 3-methyl-1-butanol, 2-methyl-2-butanol, and 3-methyl-2-butanol.
- urethane (meth) acrylate (A) As a method for preparing urethane (meth) acrylate (A), for example, a diol is reacted with diisocyanate to synthesize an isocyanate group (NCO) -terminated prepolymer, and then a hydroxyl group (OH) -containing (meth) acrylate is reacted. Method of reacting; a method of reacting diisocyanate with a hydroxyl group-containing (meth) acrylate and then reacting with a diol; a method of simultaneously reacting diol, diisocyanate and a hydroxyl group-containing (meth) acrylate can be mentioned.
- a hydroxyl group-containing (meth) acrylate may be mixed with an active hydrogen-containing silane compound or a monohydric alcohol, if necessary.
- the molar ratio (NCO / OH) of NCO and OH when reacting a diol with a diisocyanate is preferably 1.1 or more and 4.0 or less, more preferably 1.2 or more and 3.5 or less, and 1.4 or more and 3 It is more preferably 0.0 or less.
- the total molar ratio of the OH group-containing (meth) acrylate, the active hydrogen-containing silane compound, and the monohydric alcohol to the NCO of the NCO-terminated prepolymer is preferably 1.00 or more and 1.15 or less, and 1.03 or more. 10 or less is more preferable.
- the total molar ratio of the active hydrogen-containing silane compound and the monohydric alcohol to the NCO of the NCO-terminated prepolymer is preferably 0 or more and 0.5 or less.
- the monofunctional urethane (meth) acrylate is a reaction product of a polyoxyalkylene monoalkyl ether, a diisocyanate and a hydroxyl group-containing (meth) acrylate, or a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth). ) It is a reaction product with acrylate.
- the monofunctional urethane (meth) acrylate is a component having one (meth) acryloyl group.
- the urethane (meth) acrylate containing a monofunctional urethane (meth) acrylate as a main component may be referred to as “urethane (meth) acrylate (B)”.
- the monofunctional urethane (meth) acrylate (B1) which is a reaction product of a polyoxyalkylene monoalkyl ether, a diisocyanate, and a hydroxyl group-containing (meth) acrylate, can be represented by the following formula (2).
- A represents a residue of a hydroxyl group-containing (meth) acrylate
- U represents a urethane bond
- I represents a residue of diisocyanate
- P1 represents a residue of polyoxyalkylene monoalkyl ether.
- the monofunctional urethane (meth) acrylate (B1) has a (meth) acryloyl group derived from a hydroxyl group-containing (meth) acrylate and an alkoxy group derived from a polyoxyalkylene monoalkyl ether.
- a method for synthesizing the monofunctional urethane (meth) acrylate (B1) for example, a method of reacting a polyoxyalkylene monoalkyl ether with a diisocyanate and then reacting with a hydroxyl group-containing (meth) acrylate; a diisocyanate and a hydroxyl group-containing (meth).
- a method of reacting the polyoxyalkylene monoalkyl ether with the acrylate followed by the polyoxyalkylene monoalkyl ether; a method of simultaneously reacting the polyoxyalkylene monoalkyl ether with the diisocyanate and the hydroxyl group-containing (meth) acrylate can be mentioned.
- the monofunctional urethane (meth) acrylate (B2) which is a reaction product of the polyoxyalkylene monoalkyl ether and the isocyanate group-containing (meth) acrylate, can be represented by the following formula (3).
- AI represents a residue of an isocyanate group-containing (meth) acrylate
- U represents a urethane bond
- P1 represents a residue of a polyoxyalkylene monoalkyl ether.
- the monofunctional urethane (meth) acrylate (B2) has a (meth) acryloyl group derived from an isocyanate group-containing (meth) acrylate and an alkoxy group derived from a polyoxyalkylene monoalkyl ether.
- AI-U-P1 (3)
- the polyoxyalkylene monoalkyl ether is a compound having an oxyalkylene group, an alkoxy group and a hydroxyl group.
- Examples of the polyoxyalkylene monoalkyl ether according to the present embodiment include polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, and polyoxyethylene alkyl (C 12 to C 14 ).
- Ether polyoxyethylene tridecyl ether, polyoxyethylene myristyl ether, polyoxyethylene isostearyl ether, polyoxyethylene octyldodecyl ether, polyoxyethylene cholesteryl ether, polyoxypropylene butyl ether, polyoxypropylene myristyl ether, polyoxypropylene Cetyl ether, polyoxypropylene stearyl ether, polyoxypropylene lanolin alcohol ether, polyoxyethylene polyoxypropylene butyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene stearyl ether , And polyoxyethylene polyoxypropylene decyltetradecyl ether.
- the polyoxyalkylene monoalkyl ether is preferably polyoxypropylene monobutyl ether.
- the Mn of the polyoxyalkylene monoalkyl ether is preferably 2000 or more and 10000 or less, may be 2100 or more or 2200 or more, and is 8000 or less or 7000 or less. There may be.
- the Mn of the diol and the polyoxyalkylene monoalkyl ether can be calculated from the following formula by measuring the hydroxyl value based on JIS K 0070.
- the number of functional groups of the diol is 2, and the number of functional groups of the polyoxyalkylene monoalkyl ether is 1.
- Mn 56.1 x number of functional groups x 1000 / hydroxyl value
- the polyoxyalkylene monoalkyl ether may have an asymmetric molecular weight distribution containing a high molecular weight component having a molecular weight of 50,000 or more and having a tail on the high molecular weight side. ..
- examples of such polyoxyalkylene monoalkyl ethers include the trade names "Acrobute MB-90" and "Acrobute MB-52" manufactured by NOF CORPORATION.
- the presence or absence of a high molecular weight component having a molecular weight of 50,000 or more can be confirmed by measurement by gel permeation chromatography (GPC).
- the molecular weight of the high molecular weight component may be 100,000 or more and 1,000,000 or less.
- Examples of the isocyanate group-containing (meth) acrylate include 2-acryloyloxyethyl isocyanate, 2-methacryloyloxyethyl isocyanate, 2- (2-isocyanateethoxy) ethyl methacrylate, and 1,1- (bisacryloyloxymethyl) ethyl isocyanate. And 1,1- (bismethacryloyloxymethyl) ethyl isocyanate. From the viewpoint of reactivity, 2-acryloyloxyethyl isocyanate is preferable.
- An organotin compound or an amine compound is used as a catalyst for synthesizing urethane (meth) acrylate.
- the organotin compound include dibutyltin dilaurate, dibutyltin diacetate, dibutyltinmalate, dibutyltinbis (2-ethylhexyl mercaptoacetate), dibutyltinbis (isooctyl mercaptoacetate), and dibutyltin oxide. From the viewpoint of easy availability or catalytic performance, it is preferable to use dibutyltin dilaurate or dibutyltin diacetate as the catalyst.
- the Mn of the urethane (meth) acrylate (A) may be 6000 or more and 50,000 or less, 8000 or more and 45,000 or less, or 10,000 or more and 40,000 or less from the viewpoint of obtaining a Young's modulus suitable for the primary resin layer.
- the Mn of the urethane (meth) acrylate (B) may be 4000 or more and 20000 or less, 5000 or more and 18000 or less, or 6000 or more and 15000 or less.
- the Mn of urethane (meth) acrylate can be measured by GPC.
- the content of the urethane (meth) acrylate (A) is preferably 10 parts by mass or more and 70 parts by mass or less, preferably 15 parts by mass, based on 100 parts by mass of the total amount of the resin composition. It is more preferably 20 parts by mass or more and 65 parts by mass or less, and further preferably 20 parts by mass or more and 60 parts by mass or less.
- the content of urethane (meth) acrylate (B) is 10 parts by mass or more and 70 parts by mass or less based on 100 parts by mass of the total amount of the resin composition. Is more preferable, 15 parts by mass or more and 65 parts by mass or less is more preferable, and 20 parts by mass or more and 60 parts by mass or less is further preferable.
- the total content of urethane (meth) acrylate (A) and urethane (meth) acrylate (B) is 50 parts by mass or more and 90 parts by mass or less, and 60 parts by mass or more and 90 parts by mass or less, based on the total amount of the resin composition. , Or 65 parts by mass or more and 85 parts by mass or less.
- the photopolymerizable compound according to the present embodiment may further contain a photopolymerizable compound having no urethane bond (hereinafter referred to as "monomer").
- the monomer include (meth) acrylic acid ester, N-vinyl compound, and (meth) acrylamide compound.
- the monomer may be a monofunctional monomer having one photopolymerizable ethylenically unsaturated group, or may be a polyfunctional monomer having two or more ethylenically unsaturated groups. Two or more kinds of monomers may be mixed and used.
- Examples of the monofunctional (meth) acrylic acid ester include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, s-butyl (meth) acrylate, and t-.
- polyfunctional (meth) acrylic acid ester examples include ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and tripropylene glycol.
- the Young's modulus of the resin layer can be adjusted by including the (meth) acrylic acid ester in the photopolymerizable compound.
- the content of the (meth) acrylic acid ester is 1 part by mass or more and 50 parts by mass or less, 3 parts by mass or more and 45 parts by mass or less, or 5 parts by mass or more and 40 parts by mass or less, based on 100 parts by mass of the total amount of the resin composition. May be.
- N-vinyl compound examples include N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylmethyloxazolidinone, N-vinylimidazole, and N-vinyl-N-methylacetamide.
- the curing rate of the resin composition can be further improved.
- the content of the N-vinyl compound is 1 part by mass or more and 30 parts by mass or less, 2 parts by mass or more and 20 parts by mass or less, or 5 parts by mass or more and 15 parts by mass or less, based on 100 parts by mass of the total amount of the resin composition. You may.
- Examples of the (meth) acrylamide compound include dimethyl (meth) acrylamide, diethyl (meth) acrylamide, (meth) acryloylmorpholin, hydroxymethyl (meth) acrylamide, hydroxyethyl (meth) acrylamide, isopropyl (meth) acrylamide, and dimethylamino.
- the curing rate of the resin composition can be further improved.
- the content of the (meth) acrylamide compound is 1 part by mass or more and 30 parts by mass or less, 2 parts by mass or more and 20 parts by mass or less, or 3 parts by mass or more and 15 parts by mass or less, based on 100 parts by mass of the total amount of the resin composition. There may be.
- the photopolymerization initiator can be appropriately selected from known radical photopolymerization initiators and used.
- Examples of the photopolymerization initiator include 1-hydroxycyclohexylphenylketone (Omnirad 184, manufactured by IGM Resins), 2,2-dimethoxy-2-phenylacetophenone (Omnirad 651, manufactured by IGM Resins), 2,4,6.
- the photopolymerization initiator may be used as a mixture of two or more.
- the photopolymerization initiator preferably contains 2,4,6-trimethylbenzoyldiphenylphosphine oxide because the resin composition is excellent in quick-curing property.
- the content of the photopolymerization initiator is preferably 0.2 parts by mass or more and 5 parts by mass or less, more preferably 0.3 parts by mass or more and 4 parts by mass or less, and 0.4 parts by mass or more, based on the total amount of the resin composition. More preferably, it is 3 parts by mass or less.
- the resin composition according to the present embodiment can achieve both low Young's modulus and high breaking strength and does not cause defects in the primary resin layer, it is possible to form a resin layer suitable for the primary coating of an optical fiber. ..
- the resin composition according to the present embodiment comprises a step of synthesizing a bifunctional urethane (meth) acrylate by a reaction of a diol, a diisocyanate, and a hydroxyl group-containing (meth) acrylate, a polyoxyalkylene monoalkyl ether, and a diisocyanate.
- a step of synthesizing a monofunctional urethane (meth) acrylate by a reaction with a hydroxyl group-containing (meth) acrylate or a reaction between a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth) acrylate, and a bifunctional urethane It can be produced by a step of mixing a photopolymerizable compound containing a meta) acrylate and a monofunctional urethane (meth) acrylate with a photopolymerization initiator to prepare a resin composition.
- the resin composition according to the present embodiment may further contain a photoacid generator, a silane coupling agent, a leveling agent, an antifoaming agent, an antioxidant, an ultraviolet absorber and the like.
- an onium salt having an A + B - structure may be used.
- the photoacid generator include sulfonium salts such as CPI-100P, 101A, 110P, 200K, 210S, 310B, 410S (manufactured by Sun Appro Co., Ltd.), Omnicat 270, 290 (manufactured by IGM Resins), and CPI-IK-.
- iodonium salts such as 1 (manufactured by Sun Appro Co., Ltd.), Omnicat 250 (manufactured by IGM Resins), WPI-113, 116, 124, 169, 170 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).
- silane coupling agent examples include tetramethylsilicate, tetraethylsilicate, mercaptopropyltrimethoxysilane, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris ( ⁇ -methoxy-ethoxy) silane, and ⁇ - (3,4-epoxycyclohexyl).
- the viscosity of the resin composition according to the present embodiment at 25 ° C. is preferably 0.5 Pa ⁇ s or more and 20 Pa ⁇ s or less, preferably 0.8 Pa ⁇ s or more and 18 Pa ⁇ s or less, from the viewpoint of coatability. It is more preferable that there is, and it is further preferable that it is 1 Pa ⁇ s or more and 15 Pa ⁇ s or less.
- the viscosity of the resin composition at 25 ° C. was determined by using a B-type viscometer (“Digital Viscometer DV-II” manufactured by Brookfield). It can be measured under the conditions of 18. and the rotation speed of 10 rpm.
- 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 coated 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 contain glass such as quartz glass.
- glass such as quartz glass.
- quartz glass or pure quartz glass to which germanium is added can be used for the core 11, and pure quartz glass or pure quartz glass or pure quartz glass can be used for the clad 12. Quartz glass to which fluorine is added can be used.
- the outer diameter (D2) of the glass fiber 13 is about 100 ⁇ m to 125 ⁇ m, and the diameter (D1) of the core 11 constituting the glass fiber 13 is about 7 ⁇ m to 15 ⁇ m.
- the thickness of the coating resin layer 16 is usually about 22 ⁇ m to 70 ⁇ m.
- the thickness of each of the primary resin layer 14 and the secondary resin layer 15 may be about 5 ⁇ m to 50 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 10 ⁇ m to 50 ⁇ m.
- the thickness of the primary resin layer 14 may be 35 ⁇ m
- the thickness of the secondary resin layer 15 may be 25 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 245 ⁇ m to 265 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 8 ⁇ m to 38 ⁇ m.
- the thickness of the primary resin layer 14 may be 25 ⁇ m
- the thickness of the secondary resin layer 15 may be 10 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 165 ⁇ m to 221 ⁇ m.
- the thickness of each layer of the primary resin layer 14 and the secondary resin layer 15 may be about 5 ⁇ m to 32 ⁇ m.
- the thickness of the primary resin layer 14 may be 25 ⁇ m
- the thickness of the secondary resin layer 15 may be 10 ⁇ m.
- the outer diameter of the optical fiber 10 may be about 144 ⁇ m to 174 ⁇ m.
- the outer diameter of the optical fiber can be reduced to 220 ⁇ m or less, and an optical fiber having excellent microbend resistance and low temperature characteristics can be produced. Can be done.
- the method for manufacturing an optical fiber according to the present embodiment is a coating step of applying the above resin composition to the outer periphery of a glass fiber including a core and a clad, and curing the resin composition by irradiating ultraviolet rays after the coating step. Including a curing step.
- the Young's modulus of the primary resin layer is preferably 0.8 MPa or less at 23 ° C. ⁇ 2 ° C., and more preferably 0.5 MPa or less, from the viewpoint of improving the microbend resistance of the optical fiber. If the Young's modulus of the primary resin layer exceeds 0.8 MPa, an external force is likely to be transmitted to the glass fiber, and the increase in transmission loss due to microbend may increase.
- the Young's modulus of the primary resin layer can be measured by the Pullout Modulus (POM) method at 23 ° C.
- POM Pullout Modulus
- Two points of the optical fiber are fixed by two chuck devices, the coated resin layer (primary resin layer and secondary resin layer) portion between the two chuck devices is removed, and then one chuck device is fixed and the other. Gently move the chuck device in the opposite direction of the fixed chuck device.
- the length of the part sandwiched between the moving chuck devices in the optical fiber is L
- the moving amount of the chuck is Z
- the outer diameter of the primary resin layer is Dp
- the outer diameter of the glass fiber is Df
- the Poisson's ratio of the primary resin layer is n.
- the secondary resin layer 15 can be formed by curing, for example, a resin composition containing a photopolymerizable compound containing urethane (meth) acrylate, a photopolymerization initiator, and the like.
- the resin composition forming the secondary resin layer has a composition different from that of the resin composition for primary coating.
- the resin composition for the secondary coating can be prepared by using a conventionally known technique.
- the Young's modulus of the secondary resin layer is preferably 800 MPa or more at 23 ° C. ⁇ 2 ° C., more preferably 1000 MPa or more, still more preferably 1200 MPa or more.
- the upper limit of the Young's modulus of the secondary resin layer is not particularly limited, but may be 3000 MPa or less, 2500 MPa or less, or 2000 MPa or less at 23 ° C. ⁇ 2 ° C. from the viewpoint of imparting appropriate toughness to the secondary resin layer.
- the Young's modulus of the secondary resin layer can be measured by the following method. First, the optical fiber is immersed in a mixed solvent of acetone and ethanol, and only the coating resin layer is extracted in a tubular shape. At this time, the primary resin layer and the secondary resin layer are integrated, but the Young's modulus of the primary resin layer is 1/1000 or more and 1/10000 or less of the secondary resin layer, so that the Young's modulus of the primary resin layer is Can be ignored. Next, after removing the solvent from the coated resin layer by vacuum drying, a tensile test (tensile speed is 1 mm / min) is performed at 23 ° C., and the Young's modulus can be obtained by a secant type with a 2.5% strain.
- the optical fiber in the method for producing an optical fiber according to the present embodiment, by using the resin composition according to the present embodiment as the resin composition for primary coating, the optical fiber can be made into a small diameter of 220 ⁇ m or less. It is possible to manufacture an optical fiber having excellent microbend characteristics and low temperature characteristics.
- optical fiber ribbon An optical fiber ribbon can be manufactured using the optical fiber according to the present embodiment.
- the optical fiber ribbon a plurality of the above optical fibers are arranged in parallel and coated with a ribbon resin.
- FIG. 2 is a schematic cross-sectional view showing an optical fiber ribbon according to an embodiment.
- the optical fiber ribbon 100 has a plurality of optical fibers 10 and a connecting resin layer 40 in which the optical fibers 10 are (integrally) coated with a ribbon resin and connected to each other.
- four optical fibers 10 are shown as an example, but the number of the optical fibers 10 is not particularly limited.
- the optical fibers 10 may be integrated in a state of being in contact with each other in parallel, or a part or all of the optical fibers 10 may be integrated in a state of being arranged in parallel at regular intervals.
- the distance F between the centers of the adjacent optical fibers 10 may be 220 ⁇ m or more and 280 ⁇ m or less. When the distance between the centers is 220 ⁇ m or more and 280 ⁇ m or less, the optical fiber can be easily placed in the existing V-groove, and an optical fiber ribbon having excellent batch fusion property can be obtained.
- the thickness T of the optical fiber ribbon 100 may be 164 ⁇ m or more and 285 ⁇ m or less, although it depends on the outer diameter of the optical fiber 10.
- FIG. 3 is a schematic cross-sectional view showing an example of an optical fiber ribbon in which optical fibers are integrated in a state of being arranged in parallel at regular intervals.
- the optical fiber ribbon 100A shown in FIG. 3 two optical fibers 10 are connected by a ribbon resin at regular intervals of twelve.
- the ribbon resin forms the connecting resin layer 40.
- the ribbon resin a resin material generally known as a ribbon material can be used.
- the ribbon resin is a heat-curable resin such as a silicone resin, an epoxy resin, or a urethane resin, or an ultraviolet curable such as an epoxy acrylate, a urethane acrylate, or a polyester acrylate, from the viewpoint of damage prevention and easy fragmentation of the optical fiber 10. It may contain a mold resin.
- the thickness of the connecting portion at the center of the optical fibers 10 is , 150 ⁇ m or more and 220 ⁇ m or less may be used. Since the optical fiber ribbon is easily deformed when it is housed in the cable, the optical fiber ribbon may have a recess in the connecting portion of the optical fiber. The recess may be formed in a triangular shape with a narrow angle on one surface of the connecting portion.
- the optical fiber ribbon according to the present embodiment may have a connecting portion and a non-connecting portion intermittently in the longitudinal direction and the width direction.
- FIG. 4 is a plan view showing the appearance of the optical fiber ribbon according to the embodiment.
- the optical fiber ribbon 100B has a plurality of optical fibers, a plurality of connecting portions 20, and a non-connecting portion (divided portion) 21.
- the non-connecting portion 21 is formed intermittently in the longitudinal direction of the optical fiber ribbon.
- the optical fiber ribbon 100B is an intermittently connected optical fiber ribbon in which a connecting portion 20 and a non-connecting portion 21 are intermittently provided in the longitudinal direction for each of the two optical fibers 10A.
- the "connecting portion” means a portion where adjacent optical fibers are integrated via a connecting resin layer
- the "non-connecting portion” means a portion where adjacent optical fibers are not integrated via a connecting resin layer.
- the non-connecting portion 21 is intermittently provided in the connecting portion 20 provided for each of the two cores of the optical fiber ribbon having the above configuration, the optical fiber ribbon is easily deformed. Therefore, when the optical fiber ribbon is mounted on the optical fiber cable, it can be easily rolled and mounted, so that the optical fiber ribbon suitable for high-density mounting can be obtained. Further, since the connecting portion 20 can be easily torn from the non-connecting portion 21 as a starting point, the single core of the optical fiber 10 in the optical fiber ribbon can be easily separated.
- the optical fiber ribbon according to the present embodiment has excellent microbend resistance and low temperature characteristics, and can be filled in the optical fiber cable at high density.
- the optical fiber ribbon is housed in the cable.
- the optical fiber cable include a slot-type optical fiber cable having a plurality of slot grooves.
- the optical fiber ribbon can be mounted in the slot groove so that the mounting density in each slot groove is about 25% to 65%.
- the mounting density means the ratio of the cross-sectional area of the optical fiber ribbon mounted in the slot groove to the cross-sectional area of the slot groove.
- the optical fiber cable according to the present embodiment may have a mode in which the plurality of optical fibers are housed in the cable without being covered with the ribbon resin.
- FIGS. 5 and 6 An example of the optical fiber cable according to this embodiment will be described with reference to FIGS. 5 and 6.
- the intermittently connected optical fiber ribbon is stored, but a plurality of optical fibers not coated with the ribbon resin may be stored in a bundled state.
- FIG. 5 is a schematic cross-sectional view of a slotless optical fiber cable 60 using the above-mentioned intermittently connected optical fiber ribbon 100B.
- the optical fiber cable 60 has a cylindrical tube 61 and a plurality of optical fiber ribbons 100B.
- the plurality of optical fiber ribbons 100B may be bundled by an interposition 62 such as an aramid fiber. Further, the plurality of optical fiber ribbons 100B may have different markings.
- the optical fiber cable 60 has a structure formed by twisting a plurality of bundled optical fiber ribbons 100B, extruding a resin to be a tube 61 around the bundled optical fiber ribbons 100B, and covering the tension member 63 with an outer cover 64. ..
- the absorbent yarn may be inserted inside the tube 61.
- the tube 61 can be formed by using, for example, a resin such as polybutylene terephthalate or high-density polyethylene.
- a tear string 65 may be provided on the outside of the tube 61.
- FIG. 6 is a schematic cross-sectional view of a slot-type optical fiber cable 70 using the above-mentioned intermittently connected optical fiber ribbon 100B.
- the optical fiber cable 70 has a slot rod 72 having a plurality of slot grooves 71 and a plurality of optical fiber ribbons 100B.
- the optical fiber cable 70 has a structure in which a plurality of slot grooves 71 are radially provided on a slot rod 72 having a tension member 73 in the center.
- the plurality of slot grooves 71 may be provided in a spiral or SZ-like twisted shape in the longitudinal direction of the optical fiber cable 70.
- a plurality of optical fiber ribbons 100B separated from the parallel state and made into a dense state are housed.
- Each optical fiber ribbon 100B may be bundled with an identification bundle material.
- a presser winding tape 74 is wound around the slot rod 72, and an outer cover 75 is formed around the presser roll tape 74.
- the optical fiber cable provided with the optical fiber or the optical fiber ribbon according to this embodiment is excellent in microbend resistance and low temperature characteristics.
- A-1) Mn3000 polypropylene glycol (trade name "Sannicks PP-3000” manufactured by Sanyo Kasei Kogyo Co., Ltd.) and 2,4-toluene diisocyanate (TDI) have a molar ratio of NCO to OH (NCO / OH) of 1.
- NCO / OH 2,4-toluene diisocyanate
- A-2) Mn12000 polypropylene glycol (trade name "PREMINOL S4013F” manufactured by AGC Inc.) and TDI were reacted at NCO / OH of 2.0 at 60 ° C. for 1 hour to prepare an NCO-terminated prepolymer.
- 200 ppm of dibutyltin dilaurate was added to the final total charge.
- HEA was added to the NCO of the NCO-terminated prepolymer so that the molar ratio of OH of HEA was 1.05, and the mixture was reacted at 60 ° C. for 1 hour to obtain a urethane acrylate (A-2) of Mn24500.
- (B-1) Mn2300 polyoxypropylene monobutyl ether (trade name "Unilube MB-370" manufactured by NOF CORPORATION) and TDI are reacted at NCO / OH of 2.0 at 60 ° C. for 1 hour to obtain an NCO-terminated prepolymer.
- NCO-terminated prepolymer preparedd. 200 ppm of dibutyltin dilaurate was added to the final total charge.
- HEA was added to the NCO of the NCO-terminated prepolymer so that the molar ratio of OH of 2-hydroxyethyl acrylate (HEA) was 1.05, and the mixture was reacted at 60 ° C. for 1 hour to obtain Mn6200.
- Urethane acrylate (B-1) was obtained.
- B-2 Mn3070 polyoxypropylene monobutyl ether (trade name "Nieuport LB3000" manufactured by Sanyo Chemical Industries, Ltd.) and TDI are reacted at NCO / OH of 2.0 at 60 ° C. for 1 hour to prepare an NCO-terminated prepolymer. did. 200 ppm of dibutyltin dilaurate was added to the final total charge. Next, HEA was added to the NCO of the NCO-terminated prepolymer so that the molar ratio of OH of 2-hydroxyethyl acrylate (HEA) was 1.05, and the mixture was reacted at 60 ° C. for 1 hour to obtain Mn8900. Urethane acrylate (B-2) was obtained.
- HEA 2-hydroxyethyl acrylate
- Mn of polypropylene glycol and polyoxypropylene butyl monoether is a value obtained from the hydroxyl value, and is a value described in the catalog of each product.
- Mn of urethane acrylate ACQUITY APC RI system manufactured by Waters was used, sample concentration: 0.2 mass% THF solution, injection amount: 20 ⁇ L, sample temperature: 15 ° C., mobile phase: THF, XT column for organic solvent: particles.
- the measurement was performed under the conditions of a column length of 150 mm, a column temperature of 40 ° C., and a flow velocity of 0.8 mL / min.
- nonylphenol polyethylene glycol acrylate (trade name "Aronix M-113" manufactured by Toa Synthetic Co., Ltd.), isobornyl acrylate (IBXA), N-vinylcaprolactam (NVCL), acryloylmorpholin (ACMO), bisphenol A epoxydi ( Meta) acrylate (trade name "Viscoat # 540" manufactured by Osaka Organic Chemical Industry Co., Ltd.) and tripropylene glycol diacrylate (TPGDA) were prepared.
- 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Omnirad TPO) and 1-hydroxycyclohexylphenylketone (Omnirad 184) were prepared as photopolymerization initiators.
- 3-Acryloxypropyltrimethoxysilane (APTMS) was prepared as a silane coupling agent.
- viscosity The viscosity of the resin composition at 25 ° C. was measured using a B-type viscometer (“Digital Viscometer DV-II” manufactured by Brookfield), and the spindle: No. It was measured under the conditions of 18 and the rotation speed of 10 rpm.
- the resin film is punched into a JIS K 7127 type 5 dumbbell shape, and pulled under the conditions of 23 ⁇ 2 ° C., 50 ⁇ 10% RH, a tensile speed of 1 mm / min, and a distance between marked lines of 25 mm using a tensile tester. , A stress-strain curve was obtained.
- the Young's modulus of the resin film was obtained by dividing the stress obtained by the secant method of 2.5% strain by the cross-sectional area of the resin film.
- the resin film is punched into a JIS K 7127 type 5 dumbbell shape, and pulled under the conditions of 23 ⁇ 2 ° C., 50 ⁇ 10% RH, a tensile speed of 50 mm / min, and a distance between marked lines of 25 mm using a tensile tester. , A stress-strain curve was obtained.
- the breaking strength of the resin film was obtained by dividing the stress at the time of breaking by the cross-sectional area of the resin film. Further, the breaking elongation of the resin film was obtained by dividing the displacement at the time of breaking between the marked lines.
- a resin composition for secondary coating by mixing 25 parts by mass of urethane acrylate (Z-1), 36 parts by mass of TPGTA, 37 parts by mass of Viscoat # 540, 1 part by mass of Omnirad TPO, and 1 part by mass of Omnirad 184.
- a resin composition for primary coating and a resin composition for secondary coating were applied to the outer peripheral surface of the glass fiber 13 having a diameter of 125 ⁇ m, respectively.
- each resin composition was cured by irradiating with ultraviolet rays to form a coated resin layer 16 including a primary resin layer 14 and a secondary resin layer 15, and an optical fiber 10 was produced.
- the thickness of the primary resin layer 14 was 20 ⁇ m
- the thickness of the secondary resin layer 15 was 15 ⁇ m
- an optical fiber having an outer diameter of 195 ⁇ m was obtained.
- the resin composition for primary coating does not contain urethane acrylate (A), an optical fiber could not be produced.
- the transmission loss of light having a wavelength of 1550 nm when the optical fiber 10 was wound in a single layer on a bobbin having a diameter of 280 mm covered with sandpaper was measured by an OTDR (Optical Time Domain Reflectometer) method. Further, when the optical fiber 10 is wound in a single layer on a bobbin having a diameter of 280 mm without sandpaper, the difference in transmission loss of light having a wavelength of 1550 nm is "A", 0.5 dB / km or more, if it is less than 0.5 dB / km. The case of 1.0 dB / km or less was evaluated as "B", and the case of exceeding 1.0 dB / km was evaluated as "C".
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Abstract
Description
本出願は、2020年12月21日出願の日本出願第2020-211203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。
プライマリ被覆用の樹脂組成物は、ヤング率を低くするにつれて、破断強度も低下する傾向があり、プライマリ樹脂層に欠陥(ボイド)が生じて、特に低温において伝送損失の増加を招き易くなる。
本開示によれば、低ヤング率と高破断強度を両立する、光ファイバのプライマリ被覆に好適な樹脂層を形成することができる樹脂組成物、及び耐マイクロベンド特性と低温特性に優れ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のプライマリ被覆用樹脂組成物は、2官能ウレタン(メタ)アクリレート及び単官能ウレタン(メタ)アクリレートを含む光重合性化合物と、光重合開始剤と、を含有し、2官能ウレタン(メタ)アクリレートが、ジオールと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応物であり、単官能ウレタン(メタ)アクリレートが、ポリオキシアルキレンモノアルキルエーテルと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応物、又はポリオキシアルキレンモノアルキルエーテルと、イソシアネート基含有(メタ)アクリレートとの反応物である。
本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、本開示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。本明細書における(メタ)アクリレートとは、アクリレート又はそれに対応するメタクリレートを意味し、(メタ)アクリロイル等の他の類似表現についても同様である。
本実施形態に係る樹脂組成物は、2官能ウレタン(メタ)アクリレート及び単官能ウレタン(メタ)アクリレートを含む光重合性化合物と、光重合開始剤と、を含有する。
A-(U-I-U-P2)n-U-I-U-A (1)
A-U-I-U-P1 (2)
AI-U-P1 (3)
Mn=56.1×官能基数×1000/水酸基価
図1は、本実施形態に係る光ファイバの一例を示す概略断面図である。光ファイバ10は、コア11及びクラッド12を含むガラスファイバ13と、ガラスファイバ13の外周に設けられたプライマリ樹脂層14及びセカンダリ樹脂層15を含む被覆樹脂層16とを備えている。
ヤング率(MPa)=((1+n)W/πLZ)×ln(Dp/Df)
本実施形態に係る光ファイバを用いて光ファイバリボンを作製することができる。光ファイバリボンは、上記光ファイバが複数並列され、リボン用樹脂で被覆されている。
本実施形態に係る光ファイバケーブルは、上記光ファイバリボンがケーブル内に収納されている。光ファイバケーブルとしては、例えば、複数のスロット溝を有するスロット型の光ファイバケーブルが挙げられる。スロット溝内には、上記光ファイバリボンを、各スロット溝における実装密度が25%から65%程度となるように実装することができる。実装密度とは、スロット溝の断面積に対するスロット溝内に実装される光ファイバリボンの断面積の割合を意味する。本実施形態に係る光ファイバケーブルは、上記複数の光ファイバをリボン用樹脂で被覆せずにケーブル内に収納した態様であってもよい。
2官能ウレタンアクリレートを主成分として含むウレタンアクリレート(A)を以下の手順で合成した。
Mn3000のポリプロピレングリコール(三洋化成工業株式会社製の商品名「サンニックス PP-3000」)と2,4-トリレンジイソシアネート(TDI)とを、NCOとOHのモル比(NCO/OH)が1.5で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。触媒として、ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、OHのモル比が1.05となるように2-ヒドロキシエチルアクリレート(HEA)を添加し、60℃で1時間反応させて、Mn11300のウレタンアクリレート(A-1)を得た。
Mn12000のポリプロピレングリコール(AGC株式会社製の商品名「PREMINOL S4013F」)とTDIとをNCO/OHが2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、HEAのOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn24500のウレタンアクリレート(A-2)を得た。
Mn18000のポリプロピレングリコール(AGC株式会社製の商品名「PREMINOL S4318F」)とTDIとをNCO/OHが2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、HEAのOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn36700のウレタンアクリレート(A-3)を得た。
PREMINOL S4318FとTDIとをNCO/OHが2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、SHのモル比が0.2となるように3-メルカプトプロピルトリメトキシシラン(MPTS)を、OHのモル比が0.85となるようにHEAを添加し、60℃で1時間反応させて、Mn36800のウレタンアクリレート(A-4)を得た。
PP-3000とTDIとをNCO/OHが1.5で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、OHのモル比が0.4となるようにメタノールを、OHのモル比が0.65となるようにHEAを添加し、60℃で1時間反応させて、Mn11200のウレタンアクリレート(Y-1)を得た。
Mn600のポリプロピレングリコール(三洋化成工業株式会社製の商品名「PP-600」)とTDIとをNCO/OHが2.0で反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、OHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn2200のウレタンアクリレート(Z-1)を得た。
単官能ウレタンアクリレートを主成分として含むウレタンアクリレート(B)を以下の手順で合成した。
Mn2300のポリオキシプロピレンモノブチルエーテル(日油株式会社製の商品名「ユニルーブMB-370」)とTDIとを、NCO/OHが2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、2-ヒドロキシエチルアクリレート(HEA)のOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn6200のウレタンアクリレート(B-1)を得た。
Mn3070のポリオキシプロピレンモノブチルエーテル(三洋化成株式会社製の商品名「ニューポールLB3000」)とTDIとを、NCO/OHが2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対して、2-ヒドロキシエチルアクリレート(HEA)のOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn8900のウレタンアクリレート(B-2)を得た。
Mn5000のポリオキシプロピレンモノブチルエーテル(日油株式会社製の商品名「アクロビュートMB-90」)と2,4-トリレンジイソシアネート(TDI)とを、NCOとOHのモル比(NCO/OH)が2.0で、60℃で1時間反応させ、NCO末端プレポリマーを調製した。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。次に、NCO末端プレポリマーのNCOに対してOHのモル比が1.05となるようにHEAを添加し、60℃で1時間反応させて、Mn10000のウレタンアクリレート(B-3)を得た。
アクロビュートMB-90と2-アクリロイルオキシエチルイソシアネート(昭和電工株式会社製の商品名「カレンズAOI」)とを、NCO/OHが1.0で、60℃で1時間反応させ、Mn8500のウレタンアクリレート(B-4)を得た。ジブチルスズジラウレートを最終的な全仕込み量に対して、200ppm添加した。
表1又は表2に示す配合量(質量部)で、光重合性化合物、光重合開始剤、及びシランカップリング剤を混合して、各試験例のプライマリ被覆用の樹脂組成物を作製した。試験例1~9は、実施例に相当し、試験例10~14は比較例に相当する。
樹脂組成物の25℃における粘度を、B型粘度計(ブルックフィールド社製の「デジタル粘度計DV-II」)を用いて、スピンドル:No.18、回転数10rpmの条件で測定した。
スピンコータを用いて、樹脂組成物をポリエチレンテレフタレート(PET)フィルムの上に塗布した後、無電極UVランプシステム(Dバルブ、ヘレウス製)を用いて、10mJ/cm2及び100mW/cm2の条件で硬化させ、PETフィルム上に厚み200μmの樹脂フィルムを形成した。PETフィルムから剥がし、樹脂フィルムを得た。試験例14では、樹脂組成物がウレタンアクリレート(A)を含有していないため、樹脂フィルムを作製できなかった。
樹脂フィルムをJIS K 7127 タイプ5のダンベル形状に打ち抜き、23±2℃、50±10%RHの条件下で、引張試験機を用いて1mm/分の引張速度、標線間25mmの条件で引張り、応力-歪み曲線を得た。2.5%歪の割線式により求めた応力を樹脂フィルムの断面積で割ることで、樹脂フィルムのヤング率を求めた。
樹脂フィルムをJIS K 7127 タイプ5のダンベル形状に打ち抜き、23±2℃、50±10%RHの条件下で、引張試験機を用いて50mm/分の引張速度、標線間25mmの条件で引張り、応力-歪み曲線を得た。破断時の応力を樹脂フィルムの断面積で割ることで、樹脂フィルムの破断強度を求めた。また、破断時の変位を標線間で割ることで、樹脂フィルムの破断伸びを求めた。
ウレタンアクリレート(Z-1)を25質量部、TPGTAを36質量部、ビスコート#540を37質量部、Omnirad TPOを1質量部、Omnirad 184を1質量部混合して、セカンダリ被覆用の樹脂組成物を得た。
直径125μmのガラスファイバ13の外周面に、プライマリ被覆用の樹脂組成物とセカンダリ被覆用の樹脂組成物とをそれぞれ塗布した。次いで、紫外線を照射することでそれぞれの樹脂組成物を硬化し、プライマリ樹脂層14及びセカンダリ樹脂層15を備える被覆樹脂層16を形成し、光ファイバ10を作製した。プライマリ樹脂層14の厚さを20μm、セカンダリ樹脂層15の厚さを15μmとし、外径195μmの光ファイバを得た。試験例14では、プライマリ被覆用の樹脂組成物がウレタンアクリレート(A)を含有していないため、光ファイバを作製できなかった。
サンドペーパーで表面を覆った280mm径のボビンに、光ファイバ10を単層状に巻き付けた時の1550nmの波長の光の伝送損失を、OTDR(Optical Time Domain Reflectometer)法により測定した。また、サンドペーパーのない280mm径のボビンに、光ファイバ10を単層状に巻き付けた時の1550nmの波長の光の伝送損失差が0.5dB/km未満を「A」、0.5dB/km以上1.0dB/km以下の場合を「B」、1.0dB/kmを超える場合を「C」と評価した。
ガラスボビンに張力50gで一層巻に光ファイバを巻き付け、23℃及び-40℃のそれぞれの温度条件下で、波長1550nmの信号光の伝送特性を測定し、23℃と-40℃とでの伝送損失を求めた。-40℃での伝送損失から23℃での伝送損失を引いた伝送損失差が0dB未満を「A」、0dB以上0.01dB/km以下の場合を「B」、0.01dB/km超の場合を「C」と評価した。
11 コア
12 クラッド
13 ガラスファイバ
14 プライマリ樹脂層
15 セカンダリ樹脂層
16 被覆樹脂層
20 連結部
21 非連結部
40 連結樹脂層
60,70 光ファイバケーブル
61 円筒型のチューブ
62 介在
63,73 テンションメンバ
64,75 外被
65 引き裂き紐
71 スロット溝
72 スロットロッド
74 押さえ巻きテープ
100,100A,100B 光ファイバリボン
Claims (14)
- 2官能ウレタン(メタ)アクリレート及び単官能ウレタン(メタ)アクリレートを含む光重合性化合物と、光重合開始剤と、を含有し、
前記2官能ウレタン(メタ)アクリレートが、ジオールと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応物であり、
前記単官能ウレタン(メタ)アクリレートが、ポリオキシアルキレンモノアルキルエーテルと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応物、又はポリオキシアルキレンモノアルキルエーテルと、イソシアネート基含有(メタ)アクリレートとの反応物である、光ファイバのプライマリ被覆用の樹脂組成物。 - 前記ジオールの数平均分子量が、2500以上20000以下である、請求項1に記載の樹脂組成物。
- 前記ジオールの数平均分子量が、6000以上20000以下である、請求項1に記載の樹脂組成物。
- 前記ジオールが、ポリプロピレングリコールである、請求項1から請求項3のいずれか一項に記載の樹脂組成物。
- 前記ポリオキシアルキレンモノアルキルエーテルの数平均分子量が、2000以上10000以下である、請求項1から請求項4のいずれか一項に記載の樹脂組成物。
- 前記ポリオキシアルキレンモノアルキルエーテルが、ポリオキシプロピレンモノブチルエーテルである、請求項1から請求項5のいずれか一項に記載の樹脂組成物。
- 前記単官能ウレタン(メタ)アクリレートの含有量が、前記樹脂組成物の総量100質量部を基準として、10質量部以上70質量部以下である、請求項1から請求項6のいずれか一項に記載の樹脂組成物。
- 前記光重合性化合物が、N-ビニル化合物を更に含む、請求項1から請求項7のいずれか一項に記載の樹脂組成物。
- ジオールと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応により、2官能ウレタン(メタ)アクリレートを合成する工程と、
ポリオキシアルキレンモノアルキルエーテルと、ジイソシアネートと、水酸基含有(メタ)アクリレートとの反応、又は、ポリオキシアルキレンモノアルキルエーテルと、イソシアネート基含有(メタ)アクリレートとの反応により、単官能ウレタン(メタ)アクリレートを合成する工程と、
前記2官能ウレタン(メタ)アクリレート及び前記単官能ウレタン(メタ)アクリレートを含む光重合性化合物を、光重合開始剤と混合して樹脂組成物を調製する工程と、
を備える、請求項1から請求項8のいずれか一項に記載の樹脂組成物の製造方法。 - 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前記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、請求項1から請求項8のいずれか一項に記載の樹脂組成物の硬化物を含む、光ファイバ。 - コア及びクラッドを含むガラスファイバの外周に、請求項1から請求項8のいずれか一項に記載の樹脂組成物を塗布する塗布工程と、
前記塗布工程の後に紫外線を照射することにより前記樹脂組成物を硬化させる硬化工程と、
を含む、光ファイバの製造方法。 - 請求項10に記載の光ファイバが複数並列され、リボン用樹脂で被覆された、光ファイバリボン。
- 請求項12に記載の光ファイバリボンが、ケーブル内に収納された、光ファイバケーブル。
- 請求項10に記載の光ファイバが、ケーブル内に複数収納された、光ファイバケーブル。
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