KR100373235B1 - Optical fiber cable manufacturing process - Google Patents

Abstract

The present invention is limited to the number of twisted lip cord yarn (aramid yarn) of expensive fiber optic cable, which is entirely dependent on foreign imports in Korea, and low cost polyester yarn is twisted 200-500 times / M. Manufactured polyester yarn with high strength (e.g., tensile strength of 21.8kg / cm or more, tensile elongation of 25% or less, heat resistance temperature of 190 ° C or more and heat shrinkage of 5% or less) based on 15 minutes It is possible to provide a lip cord yarn that can adequately handle lip cord yarn tolerance (20kg / cm of tensile strength, 30% tensile elongation, heat resistance temperature of 160 ℃ and 15% heat shrinkage rate). It has the effect of inducing vital industries, lowering the production cost of optical cables, and replacing imports.

Description

Manufacturing method of lip cord yarn of optical cable. {Optical fiber cable manufacturing process}

The present invention is a manufacturing method of a lip cord company which is essentially used to cut the outer skin of the optical fiber produced from quartz, silica (Sio2), Germania (Geo2), etc. as a main raw material or to cut the outer skin of the combination optical cable containing a plurality of unit optical cables It is about. As is well known, the unit optical cable is constructed by wrapping synthetic resin buffers in the outer periphery of optical fibers, aromatic synthetic polyamides used in heat resistant fiber products, and synthetic resin covers.

Such unit optical cable is manufactured by single cord, dual cord 4 wire (quad cord cable) and 6 wire (inside cable) according to the application. It prevents cutting, contraction, elongation, and wraps the outer surface with an endothelial cover and an outer cover.

In addition, it is necessary to peel off the sheath to connect the fiber to the fiber of the unit optical cable and the combination optical cable. At this time, the outer skin can be easily torn without a separate tool by being close to the optical fiber or through a lip cord yarn in the inner cover of the optical fiber. It is common for unit optical cables to be exposed.

Lipcods for this purpose have been mainly using expensive Aramid yarns which depend on imports.

Aramid is an aromatic synthetic polyamide yarn used in heat resistant textile products. It is excellent in heat resistance (melting point temperature 489 ℃), tensile elongation (5%) and strength (23kg / cm), and is applicable to the fields of electricity, electronics, information and communication, and dustproofing. It can be widely used for various purposes such as battery, cable, human body, sports, laser, marine, construction, aerospace industry, body armor, parachute, parachute, etc. As domestic situation to rely on is very expensive, the situation is limited to high temperature or special fields that require high reliability of nuclear facilities or equipment.

In view of the above-described problems, the present invention is produced in an unlimited amount and the tensile cost is increased by 1500 to 12000 denier (Denire) to produce a polyester yarn of less than half level compared to aramid yarn to meet the needs of the lip cord yarn. 21.8-41kg / cm, heat resistance (melting point temperature 190 ℃ or more (15 minutes)) adjust to tensile elongation (within 25%) and provide high strength polyester lip cord yarn with good waterproofing It relates to the speaker and the method of consolation.

This will be described in detail based on the accompanying drawings.

1 is a cross-sectional view of a unit optical cable of the present invention.

Figure 2 shows a part of the front end of the present invention and the rear part is a perspective view cut away.

3 is a cross-sectional view showing a combination optical cable of the present invention.

4 is a perspective view of a portion of FIG. 3;

5 is a manufacturing flowchart of the present invention.

[Explanation of symbols on the main parts of the drawings]

1. Optical fiber cable.

2. Optical fiber

3. Synthetic Buffer

4. Aromatic synthetic polyamide yarn (Aaramid yarn)

5.5a. First and second rip cord yarn

6. PVC jacket

7. Combination Optical Cable

8. Central strength member

9. Plastic tape or aramid yarn

10. pvc outer jacket

11. Polyester yarn

12. Bobbins.

13. Tension adjustment section

14. Envoy.

15. Winding section.

1 is a cross-sectional view of a unit optical cable of the present invention,

Fig. 2 is a perspective view showing the front end portion of the present invention and cutting the rear part thereof, wherein the optical fiber 2 produced mainly from quartz, silica, germania, etc. is placed at the center thereof, and the synthetic resin buffer 3, aromatic, Poly-polyamide yarn (4), synthetic resin cover (6) in order to wrap up the unit optical cable (1) as usual, but the polypropylene yarn about 1500 denier between the optical fiber (2) and the synthetic resin buffer (3) The ester yarn 11 is installed with the primary grain cord yarn 5.

3 is a cross-sectional view showing a combination cable of the present invention;

4 is a perspective view of a portion of FIG. 3;

According to the purpose of use, the combination optical cable (7) having a proper number of unit optical cables (1) is placed in the center of the reinforcing core (8), the outer edge of the unit optical cable (1) inner cover (9) and the outer cover The polyester yarn 11 covered with (10) and plyed over 3000 denier or more in the space between each unit optical cable 1 and the endothelial cover 9 is used as the secondary lip cord yarn 5a.

As described above, primary and secondary lip cord yarns (5) (5a) As shown in Fig. 5, the polyester yarn 11 twists the bobbin 12 in which the single wire is wound. The number should not exceed 200-500 times / M, that is, the right twisted twist (S twist) is 380 times / M and the left twist twist (Z twist) is 320 times / M.

1. Let the left twisted yarn (Z twist) be 1000 denier (Denier) thick, and the right twisted yarn (S twist) be 500 denier thick and then twisted to 1500 denier.

2. The left twisted yarn (Z twist) is 1000 denier and the right twisted yarn (S twist) is 1000 denier.

3. The left twisted yarn (Z twist) is 1000 denier, the right twisted yarn (S twist) is 1000 denier, and the central yarn is also 1000 denier.

4. The left twisted yarn, right twisted yarn, and central yarn are all set to 2000 denier and 6000 denier after plunge.

5. The left twisted yarn and the right twisted yarn are each set to 3,000 deniers after pulverizing.

6. The left and right twisted yarns shall be 6000 denier each, and shall be 12000 denier.

In this case, it is necessary to adjust the tension of the polyester yarn so as not to be stretched between the bobbin 12 wound around the polyester yarn 11 and the weaving portion 14. After that, in the reel-shaped winding unit 15, the polyester yarn completed in the yarn is wound in a separate bobbin.

Therefore, if you look at the standard value of the rip cord yarn of the unit optical cable (1), the tensile strength of the yarn is 20kg / cm, the elongation rate is less than 30%, the heat resistance temperature is maintained at 160 ℃ for 15 minutes and the heat shrinkage is less than 5% It must be maintained.

This is applied to the heating temperature during the coating coating of the optical cable.

Once manufactured by plywood with the denier unit of polyester yarn 11 of the present invention as a multiple (3000 denier), it can be equipped with high quality constituent requirements of lip cord yarn produced domestically and the unit and combination optical cable (1) (7) In accordance with the application criteria of the above 1 to 6, the denier unit, color, length and the like can be selectively twisted as expressed in the above items as the constituent requirements of the invention.

As an example, looking at the performance of 3000 denier of the polyester yarn 11, the tensile strength of the yarn is 21.879kg / cm, the tensile elongation 25%, the heat resistance temperature is 190 ℃ in 15 quarters and the heat shrinkage rate of 5% Although the strength and heat resistance are somewhat inferior to that of aramid fibers, there is an effect that can be sufficiently used as a lip cord yarn.

Table 1. Aramid, polyester test results comparison table.

As described above, the present invention is a polyester yarn (11) that mass-produces cheaply in Korea instead of aramid yarn for expensive optical cables (1) and (7), which depended on imports from foreign countries in manufacturing the lip cord yarn (5) (5a). The high efficiency is maintained by efficiently managing the coordination of the fiber cable, so that the outer sheath of the optical cable (1) and (7) can be torn off without tools, thereby reducing the production cost of the optical cable and preventing the production line from being disrupted due to lack of quantity. It is aimed at making a great contribution to this.

Claims (1)

correction 1 between the optical fiber (2) of the unit optical cable (1) and the combination optical cable (7) having several built-in, and the shell (3) (4) (6) and the inner and outer cover (8) (9) of the unit optical cable (1). In the manufacturing method of the lip cord yarn to tear the outer skin when the optical cable (1) (7) is connected through the secondary, secondary lip cord yarn, The twist number of the polyester yarn 11 is limited to 200-500 times / M, and then spun to 1500-12000 denier to suit the purpose, and the tensile strength of the yarn is not less than 21.8kg / cm, the tensile elongation is less than 25%, and the heat resistance temperature is A method for manufacturing a lip cord yarn of an optical cable, characterized in that the allowable value of the lip cord yarn (5) (5a) can be sufficiently achieved by being 190 ° C. or more and a heat shrinkage rate of 5% or less on a 15-minute basis.