KR100537177B1 - UV Curable Resin Composition for Optical Fiber Cable Strength Member - Google Patents

Abstract

The present invention relates to a resin composition for producing a tensile wire of an optical fiber cable applied to optical communication, and more particularly, to a resin composition suitable for producing a tensile wire of an FRP material for an optical fiber cable manufactured by impregnating glass fiber with a glass fiber impregnated resin. will be. The present invention provides a resin composition for producing a tensile line of an optical fiber cable that is excellent in the impregnation force on the glass fiber and can be rapidly cured by ultraviolet rays to produce a tensile line at a high speed of up to 80 m / min. In addition, the present invention is a polyfunctional urethane (meth) acrylate oligomer, epoxy (meth) acrylate oligomer, a photocurable type having a plurality of urethane bonds or urea bonds in the molecule in the composition of the photocurable resin cured by the ultraviolet light Provided is a resin composition for preparing a tensile wire of an optical fiber cable prepared by mixing a reactive monomer diluent and a photoinitiator in an appropriate ratio. Accordingly, the resin composition according to the present invention is excellent in physical properties such as tensile modulus, elongation rate and thermal stability of the tensile wire, and can be rapidly cured by ultraviolet light to maximize the production rate of the tensile wire.

Description

{UV Curable Resin Composition for Optical Fiber Cable Strength Member}

The present invention relates to a resin composition for preparing a tensile wire of an optical fiber cable applied to optical communication, and more particularly, glass fiber reinforced plastic (hereinafter referred to as "FRP") manufactured by impregnating glass fiber in a glass fiber impregnated resin. In preparing the tensile wire of the material, the glass fiber impregnated resin is composed of a photocurable resin which has excellent impregnation force on the glass fiber and can be cured quickly by ultraviolet rays, thereby obtaining physical properties such as tensile modulus, elongation rate and thermal stability of the tensile wire. The present invention relates to a resin composition for manufacturing a tensile wire of an optical fiber cable which can be made to be excellent and can be cured at a rapid time to maximize the production speed of the tensile wire.

Fiber optic cable is capable of transmitting a large amount of information, including television images and computer data, over a long distance through optical fibers with little loss, alteration, or noise. An optical fiber is a glass wire made of quartz as a main raw material, and its diameter is as thin as hair, so it is easy to handle and install. The optical fiber is composed of a core that propagates light inside, a clad serving to trap light propagating into the core, and a cladding that surrounds the clad. It is also possible to transmit television channels at the same time.

However, since the optical fiber is made of glass, it is easy to be damaged by tensile force, sharp bending and various other external forces, and is particularly weak in the tensile force applied in the longitudinal direction. Accordingly, the optical fiber cable, in which the optical fiber is integrated at a high density, is usually provided with a tensile wire to protect the optical fiber against external tensile force during embedding and installation, and to increase the tensile force of the cable itself. Tensile wires embedded in the optical fiber cable are largely divided into the center tension line used for the center line of the cable and the external tension line used for the outer layer, and tension lines of various diameters of 1.0 mm to 4.5 mm are used depending on the type of cable. This will be described with reference to FIG. 1.

1 is a cross-sectional view of an optical fiber cable, which is a cross-sectional view for explaining the internal structure of the optical fiber cable.

As shown in FIG. 1, the optical fiber cable has a central tension line 10 embedded in the center thereof, and a plurality of tubes 12 are gathered around the central tension line 10, and within the tube 12. The multi-core optical fiber 15 is mounted at a high density. The waterproof tape 14 and the inner sheath layer 16 surround the circumferences of the tubes 12. In addition, a plurality of outer tensile lines 10 'are arranged around the inner sheath layer 16 so as to form an outer sheath layer 18, and an outer sheath layer around the outer sheath layer 18. 20 is finally covered and formed.

Tensile wires 10 and 10 ′ may be formed in the center and outer layer 18 of the cable as shown in FIG. 1, but may also be embedded within the tube 12.

Tensile wires used in optical fiber cables include metal galvanized tensile wires and tensile wires of non-metallic FRP material. However, the metal-based galvanized tensile wire has a disadvantage of corrosion in the cable. Therefore, the tensile wire of the non-corrosive FRP material is used a lot, the conventional FRP tensile wire is made of glass fibers such as epoxy resins or unsaturated ester resins, such as thermosetting resins and additives such as calcium carbonate, talc, titanium oxide It is made to impregnate the mixed glass fiber impregnated resin and harden | cure by electric heat.

In general, in producing a tensile line of an FRP material, the following properties are required as the glass fiber-impregnated resin for impregnating the glass fiber, that is, the resin composition for tension line production.

(1) Manufactured tensile wire should have high tensile modulus and flexibility.

(2) Less change in physical properties under high temperature and humidity conditions

(3) Excellent flexibility

(4) It should have dimensional stability after curing.

In addition, in order to compensate for the above-mentioned disadvantages of the optical fiber mounted in the optical fiber cable, the tensile wire should be made of a material having excellent mechanical properties with high tensile modulus of elasticity of 6,000 MPa or more at 25 ° C., especially to withstand external tensile forces of 5,000 MPa or more. In addition, the tension line should have thermal stability that does not change its properties even under high temperature and high humidity conditions as the cable is buried underground or installed in the cable duct. That is, when transformed into a shape having a circumference of 30 to 100 times the diameter in a 150 ℃ environment, there should be no change and no break more than 24 hours.

However, the resin composition itself for producing a tensile wire for the FRP tensile wire for the optical fiber cable itself, as well as the tensile wire produced using the same has a low tensile modulus, lack of flexibility and elongation, and thus has a circumference of 30 times the diameter of the tensile wire. There was a problem such as a phenomenon that the breakage occurs easily when deformed into a shape having. In addition, it is composed of a thermosetting resin which is cured by electric heat, and has a slow curing speed of about 3 to 4 m / min. As a result, the production efficiency of tensile wire per hour is lowered, and thermal stability is deteriorated. .

The present invention has been invented to solve the above problems, an object of the present invention is to be suitable for the resin composition for the production of tensile wire of FRP material having a high tensile modulus, high elongation rate, to produce a tensile wire with a high draw rate It is an object of the present invention to provide a resin composition for producing a tensile line of an optical fiber cable.

The present invention is simply a mixture of epoxy resin and a thermosetting agent is cured by electric heat, so that the workability and productivity of the conventional thermosetting resin composition is poor in the production of FRP tensile line can be quickly cured by ultraviolet light photocurable resin composition The composition of the present invention can solve the conventional problems as described above and achieve the object of the present invention.

In addition, the present invention in the composition of the photo-curable resin, a urethane (meth) by mixing a polyfunctional urethane (meth) acrylate oligomer and an epoxy (meth) acrylate oligomer having a plurality of urethane bonds or urea bonds in the molecule Improved bendability and workability by acrylate oligomer and less breakage inside the cable when winding into bobbin after cabling.The structure of epoxy (meth) acrylate oligomer not only provides excellent thermal stability but also high tensile modulus. In addition, by mixing a proper amount of the reactive monomer diluent and a photoinitiator, the resin composition can be cured in a short time to achieve the object of the present invention.

The present invention provides a resin composition for preparing a tensile line of an optical fiber cable, wherein the resin composition is a photocurable resin composition cured by ultraviolet rays.

The said photocurable resin composition consists of a urethane (meth) acrylate oligomer, an epoxy (meth) acrylate oligomer, a reactive monomer diluent, and a photoinitiator mixed in a fixed ratio. In addition, optionally, additives such as an antifoaming agent, a filler, a coupling agent, etc. may be added to adjust the solution properties, curing properties, and the like of the resin composition.

The urethane (meth) acrylate oligomer is a polyfunctional oligomer having a (meth) acrylate end group and having 1 to 6 urethane bonds or urea bonds in the molecule, and preferably has a high tensile modulus of 4,000 MPa to 7,000 MPa and 2 to Poly [(2,4-toluene diisocyanate) -1,4-butanediol] di (meth) acrylate, in which a (meth) acrylate containing a hydroxyl group and a urethane prepolymer were reacted as having a high elongation of 8%, Poly [(2,6-toluene diisocyanate) -1,4-butanediol] di (meth) acrylate, poly [4,4'-methylenebis (phenyl isocyanate) -1,4-butanediol] di (meth) acrylic , Poly [(2,4-toluene diisocyanate) -1,4-butanediol / dipropylglycol] di (meth) acrylate, poly [(2,6-toluene diisocyanate) -1,4-butanediol / Dipropylglycol] di (meth) acrylate Gin alone or in combination of two or more from the group can be used as a mixture. Commercially available CN 965, 980, 984, 986 (above, Sartomer, USA), Ebecryl 284, 4830, 8301, IRR 1029 (above, Belgium, BC), Elle (LR) 8739, 8861, 8862 (above, German, BASF) etc. can be used 1 type or in mixture of 2 or more types.

According to the experimental considerations of the present inventors, it was found that the urethane (meth) acrylate oligomer as described above increases the bendability and elongation of the tensile line. However, the use of this alone results in a relatively low tensile modulus. Thus, in the present invention, an epoxy (meth) acrylate oligomer showing high tensile modulus is mixed and used. Accordingly, it is possible to increase the flexural strength and the elongation rate of the tensile line, increase the tensile modulus at the same time, increase the thermal stability, and reduce the shrinkage rate.

The epoxy (meth) acrylate oligomer used in the present invention is a photocurable oligomer having a (meth) acrylate end group and having a structure such as bisphenol A, bisphenol F and the like, and preferably has a high tensile modulus of 7,000 MPa to 10,000 MPa. Bisphenol Aglycerol Di (meth) acrylate, Bisphenol A Propoxylate Di (meth) acrylate, Bisphenol Ethoxylate Di having a high elongation rate of 0.8% to 1.5% and reacted with epoxy and (meth) acrylate. It can be used 1 type or in mixture of 2 or more types from the group which consists of (meth) acrylates. Commercially, it is a compound obtained by reacting epoxy and (meth) acrylate as CN 104, 112, 115, 120 (above, Sartomer Co., USA), LR 8765, 8777, 8819, EI (EA) 81 (above, Germany, BASF Corporation), Ebecryl 600, 605, 616, 629, 9636 (above, Belgium, BC) can be used in combination of one or two or more. Due to the characteristics of the aromatic and aliphatic structures they have, not only the thermal stability is excellent, but the shrinkage rate during curing is low, and the wear resistance and the like are excellent.

In addition, since the mixture of the urethane (meth) acrylate oligomer and the epoxy (meth) acrylate oligomer has high viscosity and poor coating property, a reactive monomer diluent is added for this purpose. The reactive monomer diluent uses a photocurable (meth) acrylate monomer, and this reactive monomer diluent serves to lower the viscosity of the mixture and to act as a crosslinkable monomer to control physical properties of the cured product.

As the reactive monomer diluent, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, butoxy ethyl (meth) acrylate, 2-dica Prolactone ethyl acrylate, ethyl diethylene glycol (meth) acrylate, 2-ethyl texyl (meth) acrylate, cyclohexyl (meth) acrylate, phenoxyethyl (meth) acrylate, dicyclopentadiene (meth) Acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, methyl triethylene diglycol (meth) acrylate, isobornyl (meth) acrylate, N-vinylpyrrolidone, N-vinyl caprolactam , Diacetone acrylamide, isobutoxymethyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, t-octyl (meth) acrylamide, dimethylaminoethyl (meth) arc Elate, acryloyl morpholine, dicyclopentenyl (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, ethylene glycol di (Meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, Neopentylglycol di (meth) acrylate, trimethylolpropanetrioxyethyl (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate, dicyclodecane dimethanol di (meth) acrylate, tripropylene glycol di (Meth) acrylate, dicyclopentanedi (meth) acrylate, dicyclopentadiene (meth) acrylate, etc. can be used.

Of these, 2-ethylhexyl (meth) acrylate, 2-dicaprolactone ethyl acrylate, cyclohexyl (meth) acrylate, phenoxyethyl (meth) acrylate, isobornyl (meth) acrylate, Acryloylmorpholine, N-vinylpyrrolidone, N-vinylcaprolactam, dimethylaminoethyl (meth) acrylate, tripropylene glycol di (meth) acrylate, cyclopentenyl (meth) acrylate, tricyclodecanedimethanol Di (meth) acrylate, trimethylolpropane tri (meth) acrylate, etc. can be used, and can be used 1 type or in mixture of 2 or more types from the group which consists of said.

In addition, a photoinitiator is added to cure at a high rate when curing with ultraviolet light. As photoinitiator, for example, 1-hydroxycyclohexylphenyl ketone, 2,2-dimethoxy-2-phenyl-acetophenone, xanthone, benzaldehyde, anthraquinone, 3-methylacetophenone, 4-chlorobenzophenone, 4 , 4'-dimethoxy benzophenone, 4,4'-diaminobenzophenone, benzoin propyl ether, benzoin ethyl ether, 1- (4-isopropyl-phenol) -2-hydroxy-2-methyl propane- 1-one, thioxanthone, etc. can be used. For commercial use, Igacure 184, 369, 651, 819, 907, 1700, 1800 (above, Switzerland, Sivagai) and Darocure 1173, 1116 (above, Germany, Merck) , Lucirine LR 8728 (German, BASF), Ubecyl-936 (Belgium, BC) and the like can be used, one or two or more of the above group can be used in combination have.

In addition, in the present invention, additives such as an antifoaming agent, a filler, a coupling agent, and the like may be optionally added to adjust the solution properties, the curing properties, and the like of the resin composition.

That is, in order to prevent bubbles generated during mixing and stirring of the resin composition and bubbles generated during tensile wire production, the antifoaming agent such as A501 (German, BW Kay Co., Ltd.), mechanical strength, etc. are reinforced. Fillers such as calcium carbonate, talc, titanium oxide, and additives such as silane coupling agents such as KBM 503 (Japan, Shinnets Co., Ltd.) to increase the strength and water resistance by improving the adhesion between the glass fiber and the resin composition. You can add

In the preferable composition ratio of the resin composition for tension line manufacture of the optical fiber cable which concerns on this invention as mentioned above, 50-90 weight% of mixtures of a urethane (meth) acrylate oligomer and an epoxy (meth) acrylate oligomer, and a photocurable reactive monomer 3 to 50% by weight of the diluent and 1 to 15% by weight of the photoinitiator are mixed.

The mixture of the urethane (meth) acrylate oligomer and the epoxy (meth) acrylate oligomer is a factor that determines the physical properties such as tensile modulus, elongation and thermal stability of the tensile wire, and less than 50% by weight has satisfactory effects in terms of physical properties. If it is more than 90% by weight, a relatively small amount of the reactive monomer diluent and the photoinitiator are added to increase the viscosity of the resin composition, resulting in a decrease in coating properties and a slow curing rate. In addition, when the reactive monomer diluent is less than 3% by weight, the viscosity is increased to reduce the coating property, and when the reactive monomer diluent is higher than 50% by weight, a relatively small amount of the mixture of the oligomer is added to deteriorate the physical properties. And, if the photoinitiator is less than 1% by weight, the curing rate of the resin composition is lowered, and the tensile line drawing rate is lowered. If the photoinitiator is more than 15% by weight, a relatively small amount of the mixture of the oligomer and the reactive monomer diluent is added to deteriorate the physical properties and the coating property.

In addition, in consideration of bubble prevention of the resin composition, mechanical strength reinforcement, glass fiber and adhesion improvement, additives such as an antifoaming agent, a filler and a coupling agent may be preferably added in an amount of 1 to 10% by weight.

In the mixture of the urethane (meth) acrylate oligomer and the epoxy (meth) acrylate oligomer, 15 to 50 wt% of the urethane (meth) acrylate oligomer and 50 to 85 wt% of the epoxy (meth) acrylate oligomer are preferable. When the urethane (meth) acrylate oligomer is less than 15% by weight and the epoxy (meth) acrylate oligomer is more than 85% by weight, the tensile modulus is increased to improve tensile strength and thermal stability, thereby reducing shrinkage. On the other hand, the elongation drops and can be broken in the cable when the bobbin is wound. In addition, when the urethane (meth) acrylate oligomer is more than 50% by weight and the epoxy (meth) acrylate oligomer is less than 50% by weight, the elongation is increased and the flexibility is excellent, but the tensile modulus and thermal stability Is lowered.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Example 1

35 wt% urethane (meth) acrylate (Belgium, Ebecryl 284) and 42 wt% epoxy (meth) acrylate (Belgium, Ebecryl 605) were added to a reactor equipped with a stirrer, followed by reactive monomers. As a diluent, 5 weight% of 2-dicaprolactone ethyl acrylate, 6 weight% of phenoxyethyl (meth) acrylate, 5 weight% of acryloylmorpholine, and 3 weight% of pentaerythritol tetra (meth) acrylates were added, As a photoinitiator, 3 parts by weight of Irgacure 1700, 907 (Sivagai Co., Switzerland) and Darocure 1173 (Merck, Germany) of 3 weight% in total, and 0.5 weight% of an antifoaming agent (A501 of Bukkei, Germany) and a coupling agent 0.5 wt% of KBM 503 (Cinetsu, Japan) was added, followed by stirring at 400 rpm for 2 hours at room temperature to obtain a clear liquid composition having a viscosity of 12,000 cps.

The liquid composition is accommodated in the impregnation tank and passed through the glass fiber yarn which has been flammed (twisted) to impregnate the liquid composition on the periphery of the glass fiber yarn, and at the same time withdrawal rate of 10m / min while irradiating UV rays to cure the liquid composition. A cylindrical tensile wire having a diameter of 2.7 mm was prepared. Tensile modulus, elongation and thermal stability of the tensile wires thus prepared were measured in the following manner. The results are shown in the following [Table 1].

① tensile modulus

1m of the prepared tension line was taken using a tensile tester (Instron, Inc., 4465P3262) to measure the pressure at break by pulling at a rate of 50mm per minute at a gauge distance of 80cm at 25 ℃, 50% relative humidity conditions.

② elongation rate

The initial length of the prepared tensile line and the tensile length at break were measured and expressed in% by the following equation.

③ thermal stability

30 times the diameter was made of the prepared tensile line to measure the time (min) to break in a 150 ℃ thermostat.

Example 2

25 weight% of urethane (meth) acrylate (Belgium, Ebecryl 284, BC) and 52 weight% of epoxy (meth) acrylate (Belgium, Ebecryl 605) were used in the reactor with a stirrer. After the addition, the other composition was added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition. In addition, the tensile wire was molded in the same manner as in Example 1, and the tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Example 3

15% by weight of the urethane (meth) acrylate (Belgium, Ebecryl 284, BC) and 62% by weight of epoxy (meth) acrylate (Belgium, Ebecryl 605) were used in the reactor equipped with a stirrer. After the addition, the other composition was added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition. In addition, the tensile wire was molded in the same manner as in Example 1, and the tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Comparative Example 1

77 wt% of the urethane (meth) acrylate (Belgium, Ebecryl 284, Inc.) used in Example 1 was added to a reactor equipped with a stirrer, and no epoxy (meth) acrylate was added. In the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition. In addition, the tensile wire was molded in the same manner as in Example 1, and the tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Comparative Example 2

77 wt% of epoxy (meth) acrylate (Belgium, Ebecryl 605, BC) was used in a reactor equipped with a stirrer, and urethane (meth) acrylate was not added. In the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition. In addition, the tensile wire was molded in the same manner as in Example 1, and the tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Example 4

15% by weight of the urethane (meth) acrylate (Belgium, Ebecryl 284, BC) and 62% by weight of epoxy (meth) acrylate (Belgium, Ebecryl 605) were used in the reactor with a stirrer. After the addition, the other composition was added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition.

The liquid composition is accommodated in the impregnation tank and passed through the glass fiber yarn which has been twisted (twisted) to impregnate the liquid composition on the periphery of the glass fiber yarn, and at the same time withdrawal rate of 20 m / min while irradiating UV rays to cure the liquid composition. A cylindrical tensile wire having a diameter of 2.7 mm was prepared. Tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Example 5

15% by weight of the urethane (meth) acrylate (Belgium, Ebecryl 284, BC) and 62% by weight of epoxy (meth) acrylate (Belgium, Ebecryl 605) were used in the reactor equipped with a stirrer. After the addition, the other composition was added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition.

The liquid composition is accommodated in the impregnation tank and passed through the glass fiber yarn which has been twisted (twisted) to impregnate the liquid composition on the periphery of the glass fiber yarn, and at the same time withdrawal rate of 50m / min while irradiating UV rays to cure the liquid composition. A cylindrical tensile wire having a diameter of 2.7 mm was prepared. Tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Example 6

15% by weight of the urethane (meth) acrylate (Belgium, Ebecryl 284, BC) and 62% by weight of epoxy (meth) acrylate (Belgium, Ebecryl 605) were used in the reactor equipped with a stirrer. After the addition, the other composition was added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a transparent liquid composition.

The liquid composition is accommodated in the impregnation tank and passed through the glass fiber yarn which has been flammed (twisted) to impregnate the liquid composition on the periphery of the glass fiber yarn, and at the same time withdrawal rate of 80 m / min while irradiating UV rays to cure the liquid composition. A cylindrical tensile wire having a diameter of 2.7 mm was prepared. Tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Example 7

15% by weight of the urethane (meth) acrylate (Belgium, Ebecryl 284, Inc.) and 62% by weight of epoxy (meth) acrylate (Ebecryl 605, Belgium) were used. After that, other compositions were added in the same manner as in Example 1 and stirred at 400 rpm for 30 minutes at room temperature to obtain a clear liquid composition.

The liquid composition is accommodated in the impregnation tank and passed through the glass fiber yarn which has been twisted (twisted) to impregnate the liquid composition on the periphery of the glass fiber yarn, and at the same time withdrawal rate of 100 m / min while irradiating UV rays to cure the liquid composition. A cylindrical tensile wire having a diameter of 2.7 mm was prepared. Tensile modulus, elongation, and thermal stability thereof were measured in the same manner as in Example 1, and the results are shown in the following [Table 1].

Comparative Example 3

Purchasing a cylindrical FRP product having a diameter of 2.7 mm molded with a thermosetting resin that is used commercially to measure the tensile modulus, elongation and thermal stability in the same manner as in Example 1 and the results are shown in Table 1 below.

Example Comparative example One 2 3 4 5 6 7 One 2 3 Composition ratio (wt%)  Urethane acrylate 35 25 15 15 15 15 15 77 0 Thermosetting Suzy  Epoxy acrylate 42 52 62 62 62 62 62 0 77  Reactive monomer diluent 19 19 19 19 19 19 19 19 19  Photoinitiator 3 3 3 3 3 3 3 3 3  Antifoam 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5  Coupling agent 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5        Tensile Modulus (MPa) 5000 5600 6500 6500 6500 6500 5000 4000 7000 5000        Elongation (%) 6.2 4.8 3.5 3.5 3.52 3.52 5.52 8 0.8 1.2        Thermal stability (min) 60 120 180 180 180 180 1.2 4 180 4        Draw out speed (m / min) 10 10 10 20 50 80 100 10 10 4

As can be seen in Examples 1 to 3 of Table 1, as the content of the epoxy (meth) acrylate oligomer increases, the tensile modulus and thermal stability increase, whereas the content of the urethane (meth) acrylate oligomer As this increases, the elongation rate increases. In addition, as can be seen in Comparative Examples 1 and 2, when any one of the urethane (meth) acrylate oligomer and the epoxy (meth) acrylate oligomer is not mixed, the tensile modulus and thermal stability are lowered or the elongation rate is low. And the impregnation force of the glass fibers was lowered at this time.

In addition, as can be seen in Examples 3 to 6, even when the withdrawal speed is increased, it can be seen that it shows a certain value in terms of physical properties, and even withdrawal speed of up to 80 m / min compared to the conventional (Comparative Example 3) It can be seen that it has physical properties.

Therefore, the present invention can produce a tensile line at a high speed of up to 80 m / min by ultraviolet curing by composition with a photo-curable resin that can be quickly cured by ultraviolet light.

In addition, the present invention uses the photocurable resin by mixing a polyfunctional urethane (meth) acrylate oligomer and an epoxy (meth) acrylate oligomer having a plurality of urethane bonds or urea bonds in the molecule, and using a reactive monomer diluent and a photoinitiator By mixing and improving the elongation rate, it is possible to reduce the breakage of the tensile wire inside the cable when winding it into the bobbin after cabling, and to withstand tensile strength of more than 5,000 MPa by excellent tensile modulus and thermal stability. There is an effect to prevent changes and breakage.

As can be seen from the above [Table 1], compared to the tensile line (comparative example 3) prepared by the resin composition of the conventional thermosetting type (tensile line prepared by the resin composition according to the present invention (Examples 1 to 6) Silver is excellent in terms of properties of tensile modulus, elongation and thermal stability, and it is possible to produce a tensile wire at a drawing speed of up to 80 m / min while securing excellent physical properties. And it has excellent dimensional stability.

1 is a cross-sectional view of an optical fiber cable.

Explanation of symbols on the main parts of the drawings

10, 10 ': tension line 12: tube

14: waterproof tape 15: optical fiber

16: inner sheath layer 18: outer layer

20: outer sheath layer

Claims (9)

delete In the resin composition for producing a tensile wire made of fiber glass reinforced plastic (Fiber glass Reinforced Plastic: FRP) material, As the photocurable resin composition wherein the resin composition is cured by ultraviolet rays, 50 to 90% by weight of a mixture of a urethane (meth) acrylate oligomer and an epoxy (meth) acrylate oligomer, 3 to 50% by weight of a reactive monomer diluent and 1 to 1 photoinitiator. A resin composition for producing a tensile wire of an optical fiber cable, characterized in that the mixture composition at 15% by weight. The resin composition according to claim 2, wherein the resin composition further comprises 1 to 10% by weight of an antifoaming agent, a coupling agent, and an additive of a filler. The mixture of the urethane (meth) acrylate oligomer and the epoxy (meth) acrylate oligomer is 15 to 50% by weight of the urethane (meth) acrylate oligomer, epoxy (meth) acrylate oligomer 50 It is mixed at -85 weight%, The resin composition for tension line manufacture of the optical fiber cable. 4. The urethane (meth) acrylate oligomer according to claim 2 or 3, wherein the urethane (meth) acrylate oligomer is a polyfunctional oligomer having a (meth) acrylate end group and having 1 to 6 urethane bonds or urea bonds in the molecule, and 4,000 MPa to 7,000. A resin composition for producing a tensile wire of an optical fiber cable, having a tensile modulus of MPa and an elongation of 2 to 8%. The resin composition according to claim 2 or 3, wherein the epoxy (meth) acrylate oligomer has a tensile modulus of 7,000 MPa to 10,000 MPa and an elongation of 0.8% to 1.5%. The urethane (meth) acrylate oligomer according to claim 2 or 3, wherein the urethane (meth) acrylate oligomer is a poly [(2,4-toluene diisocyanate) -1,4-butanediol] di (meth) acrylate, poly [(2,6) -Toluene diisocyanate) -1,4-butanediol] di (meth) acrylate, poly [4,4'-methylenebis (phenyl isocyanate) -1,4-butanediol] di (meth) acrylate, poly [(2 , 4-toluene diisocyanate) -1,4-butanediol / dipropylglycol] di (meth) acrylate, poly [(2,6-toluene diisocyanate) -1,4-butanediol / dipropylglycol ] The resin composition for tensile wire manufacture of an optical fiber cable characterized by mixing 1 type (s) or 2 or more types from the group which consists of di (meth) acrylate. The epoxy (meth) acrylate oligomer according to claim 2 or 3, wherein the epoxy (meth) acrylate oligomer is bisphenol a glycerol di (meth) acrylate, bisphenol a propoxylate di (meth) acrylate, bisphenol ethoxylate di (meth). A resin composition for preparing a tensile wire of an optical fiber cable, characterized by mixing one or two or more of the group consisting of acrylates. The method of claim 2 or 3, wherein the reactive monomer diluent is 2-ethylhexyl (meth) acrylate, 2-dicaprolactone ethyl acrylate, cyclohexyl (meth) acryl fp, phenoxyethyl (meth) acrylic Elate, isobornyl (meth) acrylate, acryloyl morpholine, N-vinylpyrrolidone, N-vinyl caprolactam, dimethylaminoethyl (meth) acrylate, tripropylene glycol di (meth) acrylate, cyclopentenyl Tensile wire of an optical fiber cable characterized by mixing one or two or more of the group consisting of (meth) acrylate, tricyclodecanedimethanoldi (meth) acrylate, and trimethylolpropane tri (meth) acrylate Resin composition for manufacture.