KR100469986B1 - Painting composite for optical cable - Google Patents

Abstract

The coating composition for an optical cable according to the present invention is a surface layer of a component of an optical cable for treating the surface layer of a component of the optical cable such as a tube, a center tensile line, a sheath, a ribbon carrier, and a ribbon slot with a function of waterproofing, flame retardant, insect repellent, and anti-proof. In the coating composition to be applied to, the superabsorbent waterproofing agent and the flame retardant which combine with water and expand, are mixed with a water-soluble oil-based adhesive having fast drying properties.

Therefore, in the present invention, the waterproof portion to be expanded by mixing with water can be applied to the necessary parts, such as the surface layer of the tube, the center tension line, sheath, ribbon carrier and ribbon slot of the optical cable, so that the waterproof function can be performed In addition, it has the effect of absorbing and swelling the water introduced by breakage of the optical cable by the expansion ability of the superabsorbent waterproofing agent applied to each element to prevent further water penetration, thereby easily maintaining the performance of the optical cable.

Description

Coating composition for optical cable {PAINTING COMPOSITE FOR OPTICAL CABLE}

The present invention relates to a coating composition for imparting waterproof, flame retardant, insect repellent, and anti-defense functions to an optical cable, and more particularly, by waterproofing a surface layer of a tube, a central tensile line, a sheath, a ribbon carrier, and a ribbon slot of the optical cable with a coating agent. The present invention relates to a coating composition for an optical cable, which easily prevents water from penetrating into an optical cable and provides a flame retardant, insect repellent, and anti-fog function to prolong the life of the optical cable.

The optical cable is coated with a sheath that can be used for communication with glass fibers of 0.1mm or less in diameter, and it has a wide bandwidth that can transmit more than gigabit per second and a small amount of light. Can be sent over long distances.

In order to waterproof the optical cable, jelly is charged inside the cable, and the inner surface of the inner line of the cable structure is wound with a waterproof chamber or a waterproof tape is wrapped around the cable, and the waterproof chamber and the waterproof tape are mixed. do.

In addition, the conventional optical fiber waterproofing method was developed in US Patent No. 5,388,175, which melts the surface layer by heating the outer surface of the synthetic tube, the inner skin and the outer shell, and applies a waterproof powder or flame retardant to the melted surface. It is.

Accordingly, when water is infiltrated by cracks in the tube, the inner skin and the outer skin, the waterproof powder prevents the penetration of water in the cracked portion, so that water does not easily enter the inside of the optical cable.

However, in the related art, even if the waterproofing layer is melted by melting the surface layer of the synthetic resin tube, the endothelial layer and the outer shell, the waterproofing powder is hardly evenly attached to the entire surface, and thus the waterproofing capability is not high.

In addition, conventionally, the waterproof powder may fall from the surface layer of the tube, the endothelial and the outer shell of the synthetic resin material, and also because the synthetic resin itself used as a coating agent is not soluble in water, there is a disadvantage that can lead to a decrease in the waterproof ability.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to waterproof the surface layer of the tube, the center tension line, the sheath, the ribbon carrier and the ribbon slot of the optical cable into the interior of the optical cable by The present invention provides a coating composition for an optical cable that can easily prevent water from penetrating and provide a flame retardant, insect repellent, and anti-fog function to extend the life of the optical cable and simplify the waterproofing process to improve workability.

In order to realize this, the present invention relates to a coating composition of an optical cable applied to the surface layer of components of an optical cable such as a tube, a central tensile line, a sheath, a ribbon carrier, and a ribbon slot, wherein the superabsorbent waterproofing agent and the flame retardant have a volatile water-soluble oily property. The coating composition for optical cables which consists of mixing with an adhesive agent is provided.

1 is a schematic configuration diagram showing an example of applying the coating composition for an optical cable according to the present invention,

2 is a schematic configuration diagram showing another example of applying the composition of the coating agent for an optical cable according to the present invention;

3 is a cross-sectional view of an example of an optical cable to which the coating agent composition according to the present invention is applied;

4 is a cross-sectional view of another example of an optical cable to which the coating composition according to the present invention is applied;

5 is a cross-sectional view of another example of an optical cable to which the coating agent composition according to the present invention is applied.

<Explanation of symbols for the main parts of the drawings>

1,1a, 1b, 1c: optical cable

2: coating agent

3: impregnation device

4: drying device

5: Injector

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 and 2 is a schematic view showing the application of the coating composition for an optical cable according to the present invention, the coating composition of the present invention is a tube (TUBE), the center tension line (CENTRAL STRENGTH COMPONENT), It is applied to the surface layer of components such as sheaths (INNER SHEATH or OUTER SHEATH), ribbon carriers and ribbon slots.

In other words, the present invention is a coating agent (2) in which a powder-like superabsorbent waterproofing agent which expands in combination with water and a flame retardant for increasing heat resistance in an optical cable are mixed with a water-soluble oily adhesive having fast drying property. In addition to the flame retardant, an additional insect repellent for preventing insects from accessing the optical cable and an antiseptic for preventing rats from accessing the optical cable may be selectively mixed.

Here, the mixing ratio of the constituent material and the oil-based adhesive composed of one or more of the superabsorbent waterproofing agent, flame retardant, insect repellent, and antidepressant may be composed of any mixing ratio, and only one of the superabsorbent waterproofing agent, flame retardant, insect repellent, and antiseptic agent or a combination thereof It is sufficient that the components are bonded so that they can be distributed throughout the components of the optical cable.

Of course, the coating agent 2 is preferably configured by mixing 35% to 60% of the constituent material consisting of a super absorbent waterproofing agent and a flame retardant and 40% to 65% of an oily adhesive in a weight ratio in consideration of coating degree, adhesive strength, drying time, and the like. .

In the present embodiment, the components of the optical cable 1 are coated with the coating agent 2, and then the components of the optical cable 1 to which the coating agent 2 is applied are dried.

As an example of applying the coating agent 2 of the present invention, as shown in FIG. 1, the components of the optical cable 1 are impregnated into the coating agent 2 so that the coating agent 2 of the optical cable 1 is applied. By applying to the surface, when the optical cable 1 continuously passes the impregnation device 3 in the longitudinal direction, the coating agent 2 incorporated in the impregnation device 3 is applied to the surface of the optical cable 1.

As described above, the optical cable 1 coated with the coating agent 2 is continuously dried while passing through the drying apparatus 4 emitting hot air or infrared rays in the longitudinal direction, thereby completing waterproofing of the optical cable 1.

At this time, the coating agent is a polyacrylate-based superabsorbent waterproofing agent and flame retardant 35% to 60%, styrene butadiene copolymerized cellulose acetate system and then blended in the weight ratio of 40% to 65% of the oil-based adhesive.

In addition, the optical cable 1 coated with the coating agent 2 by the drying device 4 is preferably dried in a temperature environment of 70 ℃ ~ 80 ℃.

The superabsorbent waterproofing agent is in the form of a powder, and a known polyacrylate polymer having excellent ability to absorb water is used. The superabsorbent polymer absorbs water and expands itself to expand to a volume of several tens to hundreds of times. In other words, the superabsorbent waterproofing agent is currently used in many fields, for example, it is a known material that is used in diapers and the like to quickly absorb the urine of a baby and expands itself. It is the same as the super absorbent polymer manufactured by the company.

Of course, the flame retardant, insect repellent and antiseptic agent are known materials, and it is sufficient to apply an optical cable after mixing with the oil-based adhesive, whether powder or liquid material. That is, the flame retardant is Shinwon Chemical Co., Ltd. It is a known material manufactured by the same company, the insect repellent is a known material manufactured by companies such as Kobico Co., Ltd., which produces products such as powdery naphthalene, Sumityon, etc. Phosphorus (것 인) of phosphorus and arsenic (아 系) and repellent (쥐) that do not want to get close to rats, using organic fluoride, pratol, wa It is a well-known substance manufactured by companies which produce warfarin, tomorin, etc., ie, green cross pharmacy.

The oil-based adhesive is water-soluble and quick-drying, and can be prepared by copolymerizing cellulose acetate system in styrene butadiene, and then saponifying it, and can be used in the first liquid phase, then later solidified to mix well with the superabsorbent waterproofing agent. Obviously, it is a known substance manufactured by a company such as Daeheung Chemical Industry Co., Ltd. at present.

The impregnation device 3 passes through the optical cable 1 by circulating the coating agent 2 from the top to the inside of the coating agent 2 while circulating the coating agent 2 from the top, and the injection device 5 is The viscosity of the coating agent 2 is made low and it sprays on the surface of the optical cable 1.

The drying device 4 generates a high-temperature heat flow or emits infrared rays, thereby rapidly drying the fast-drying wireline adhesive.

Meanwhile, the optical cable 1 applied to the present invention has various optical cables 1a, 1b, and 1c as shown in FIGS. 3 to 5.

As shown in FIG. 3, the coating agent 2 has a circumferential surface of the central tensile line 11, which is a component of the optical cable 1a of the example, and a circumferential surface of the plurality of tubes 13 containing the optical fiber 12. It can be applied and dried on the circumferential surface of the outer sheath 14.

In addition, as shown in FIG. 4, the coating agent 2 is formed on the circumferential surface of the filler 21, the surface of the ribbon carrier 22, and the circumferential surface of the outer sheath 23, which are components of the optical cable 1b of another example. It can be applied and dried.

In addition, the coating agent 2, as shown in Figure 5, the inner surface of the groove formed in the ribbon slot 31, which is a component of the optical cable 1c of another example, the inner surface of the inner sheath 32, the outer sheath ( 33) can be applied and dried on the circumferential surface.

The optical cable 1 coated with the superabsorbent waterproofing agent and the flame retardant containing the coating agent 2 according to the present invention has an external impact on components such as a tube, a central tensile line, a sheath, a ribbon carrier, and a ribbon slot. Due to this, even if cracks are generated, the cracks are filled by the coating agent 2.

That is, when water tries to penetrate into the cracked portion of the optical cable 1, the water is absorbed by the dried coating agent 2, and the super absorbent waterproof agent in the coating agent 2 expands, and the coating agent 2 becomes full due to the expansion of the super absorbent waterproof agent. Is in an expanded state and the crack is sealed.

Of course, the coating composition for an optical cable according to the present invention is evenly applied and dried to the components of the optical cable 1, the waterproof ability, flame retardant ability, insect repellent and anti-defense ability of the entire optical cable 1 is improved.

That is, when the coating agent 2 having the insect repellent and anti-defense function is used, it can be applied to the inner surface or the outer surface of the acussis of the optical cable 1, and when the coating agent 2 having the flame retardant function is used, the optical cable 1 Can be used for all components of).

Thus, the coating composition for an optical cable according to the present invention is easily applied and dried on the surface of the component that requires waterproofing or the like in the optical cable 1 to facilitate the absorption of water into the optical cable 1, the penetration of insects, and the like. It can be prevented.

As described above, the present invention, the superabsorbent waterproofing agent and the flame retardant which is mixed with water to expand and adhesively coated the surface layer of the tube, the central tension line, the sheath, the ribbon carrier and the ribbon slot of the optical cable as a whole to waterproof the various components of the optical cable. Because of the expansion ability of the superabsorbent waterproofing agent, it is easy to prevent water from penetrating into the inside of the optical cable through cracks generated in each component of the optical cable, thereby easily extending the life of the optical cable and maintaining the performance of the optical cable. There is an advantage.

In addition, the present invention is simpler and more convenient to apply and dry the coating agent of the present invention than the operation of winding with a tape or the like as in the prior art, and thus, there is an advantage that the workability can be improved by simplifying the waterproofing process.

Moreover, the present invention can additionally provide the advantage that the flame retardant, insect repellent and anti-detergent may be included in the coating agent to apply the components of the optical cable, thereby easily improving the flame retardant function, insect repellent and anti-defence function.

Claims (2)

In the coating composition of the optical cable applied to the surface layer of the components of the optical cable, such as tube, center tensile, sheath, ribbon carrier and ribbon slot, A coating composition for an optical cable, comprising 35% to 60% by weight of a material composed of at least one of a super absorbent waterproofing agent, a flame retardant, an insect repellent, and an antiseptic agent mixed with 40% by weight to 65% by weight of a water-soluble oil-based adhesive having a volatility. The method of claim 1, The oil-based adhesive is a coating composition for an optical cable comprising copolymerizing a cellulose acetate system in styrene butadiene, and then saponified.