UV-curable resin composition, optical fiber strands, colored optical fiber cores, optical fiber ribbon, method for manufacturing optical fiber strands, method for manufacturing colored optical fiber cores, and method for manufacturing optical fiber ribbon.

Abstract

It recovers from a state where the primary layer has peeled off from a bare optical fiber. [Solution] The ultraviolet-curable resin composition according to the present invention is an ultraviolet-curable resin composition for forming the primary layer in an optical fiber colored core having an optical fiber bare wire, a primary layer covering the optical fiber bare wire, and a secondary layer covering the primary layer, and includes a silane coupling agent that reversibly bonds the optical fiber bare wire and the primary layer.

Claims

1. An ultraviolet-curable resin composition for forming the primary layer in a colored optical fiber core having a bare optical fiber, a primary layer covering the bare optical fiber, and a secondary layer covering the primary layer, An ultraviolet-curable resin composition characterized by containing a silane coupling agent that reversibly bonds the bare optical fiber and the primary layer.

2. The ultraviolet-curable resin composition according to claim 1, characterized in that the silane coupling agent is a compound that does not contain a functional group that irreversibly bonds the optical fiber bare wire and the primary layer.

3. The ultraviolet-curable resin composition according to claim 1, further comprising another silane coupling agent that irreversibly bonds the optical fiber bare wire and the primary layer.

4. The ultraviolet-curable resin composition according to claim 1, characterized in that the silane coupling agent contains 0.00038 equivalents or more of a portion that reversibly bonds the bare optical fiber and the primary layer per 100 g of the ultraviolet-curable resin composition.

5. The silane coupling agent is a compound represented by the following chemical formula I, 【Chemistry 1】 In the aforementioned chemical formula I, x represents an integer from 1 to 3, y represents an integer from 0 to 2, and x + y ≤ 3, R １ R is one of an alkoxy group, an acetoxy group, or a halogen group. ２ is H or CH ３ And R ３ The ultraviolet-curable resin composition according to claim 1, characterized in that a part of the molecular chain contains a functional group that forms one or more reversible bonds between the optical fiber bare wire and the primary layer.

6. The ultraviolet-curable resin composition according to claim 1, characterized in that the silane coupling agent reversibly bonds the optical fiber bare wire and the primary layer by any of hydrogen bonding, dynamic covalent bonding, ionic bonding, or intermolecular force bonding.

7. The ultraviolet-curable resin composition according to claim 1, characterized in that the silane coupling agent comprises any one of a carboxyl group, a hydroxyl group, or an ester group.

8. The ultraviolet-curable resin composition according to claim 1, characterized in that the ultraviolet-curable resin and the silane coupling agent constituting the ultraviolet-curable resin composition have a molecular structure including a portion in which a urethane bond is formed, and the portion of the ultraviolet-curable resin and the portion of the silane coupling agent are bonded by hydrogen bonds.

9. Bare optical fiber and A primary layer formed from a first ultraviolet-curable resin composition, covering the bare optical fiber, A secondary layer formed from a second ultraviolet-curable resin composition, covering the primary layer, It has, The optical fiber strand is characterized in that the first ultraviolet-curable resin composition contains a silane coupling agent that reversibly bonds the bare optical fiber strand and the primary layer.

10. The optical fiber strand described in claim 9, A third ultraviolet-curable resin composition is formed, and a colored layer covers the secondary layer of the optical fiber strand, A colored optical fiber core characterized by having the following features.

11. A colored optical fiber core, characterized in that the secondary layer of the optical fiber core described in claim 9 is colored.

12. Having a plurality of colored optical fiber cores as described in claim 10 or 11, An optical fiber ribbon characterized by having a ribbon layer formed from a fourth ultraviolet-curable resin composition covering a plurality of the aforementioned colored optical fiber cores, and connecting the plurality of aforementioned colored optical fiber cores.

13. The process of drawing bare optical fibers from optical fiber preforms, The steps include applying a first ultraviolet-curable resin composition around the bare optical fiber to form a primary layer, A step of applying a second UV-curable resin composition around the primary layer to form a secondary layer, A step of curing the first UV-curable resin composition and the second UV-curable resin composition by irradiating them with ultraviolet light, Equipped with, A method for producing optical fiber strands, characterized in that the first ultraviolet-curable resin composition contains a silane coupling agent that reversibly bonds the bare optical fiber strand and the primary layer.

14. The method for manufacturing optical fiber strands according to claim 13, characterized in that, in the step of forming the primary layer, the first ultraviolet-curable resin composition is irradiated with ultraviolet light.

15. A method for manufacturing an optical fiber core according to claim 13, further comprising the step of applying a third ultraviolet-curable resin composition containing a coloring agent around the secondary layer to form a colored layer.

16. The method for producing a colored optical fiber core according to claim 15, characterized in that, in the step of forming the primary layer, the first ultraviolet-curable resin composition is irradiated with ultraviolet light.

17. A method for manufacturing an optical fiber strand according to claim 13, characterized in that the second ultraviolet-curable resin composition contains a coloring agent.

18. A method for manufacturing an optical fiber strand according to claim 13, characterized in that, in the step of forming the primary layer, the first ultraviolet-curable resin composition is irradiated with ultraviolet light.

19. A method for manufacturing an optical fiber ribbon, further comprising the steps of: applying a fourth ultraviolet-curable resin composition around a plurality of optical fiber colored cores manufactured by the method for manufacturing optical fiber colored cores described in any one of claims 15 to 18; and irradiating the fourth ultraviolet-curable resin composition with ultraviolet light to form a ribbon layer that connects the plurality of optical fiber colored cores.

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