An undersea optical cable

Abstract

The application belongs to the field of optical cables, and particularly relates to a submarine optical cable. The submarine optical cable comprises, from outside to inside, an outer sheath, an inner sheath, a multilayer buffer structure and an optical fiber line at the optical cable axis; a repelling structure layer is arranged between the outer sheath and the inner sheath; and the repelling structure layer is filled with a special marine repelling filler. The submarine optical cable develops and uses a special marine repelling filler, can effectively repel marine organisms, and the repelling effective component in the repelling filler has high stability, is not prone to leakage or leakage, is friendly to the environment, and meanwhile, the multilayer compression-resistant structure ensures that the submarine cable has good compression resistance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical cables, and particularly relates to a submarine optical cable. BACKGROUND

[0002] The submarine cable is a special cable used for setting across the sea or the ocean, which usually has good waterproof and water-resistant performance and can realize the transmission of optical signals and / or electric signals and / or power.

[0003] The existing submarine cable is mostly strengthened and improved in mechanical performance, and the improvement in compression resistance is the research focus. However, for the submarine cable in the near-shore and shallow sea area, damage caused by external force is not very common, and the unique biological damage in the near-shore is more common.

[0004] In the near-shore and shallow sea area, barnacles are a very common parasitic marine organism. Barnacles not only parasitize marine animals, but also parasitize objects such as ships, and after the barnacles parasitize, they will bring great trouble and damage to human life, especially the surface of the submarine optical cable, which may also be parasitized by barnacles. After the surface of the submarine optical cable is parasitized by barnacles, with the growth and reproduction of the barnacles, the submarine cable will bear a huge weight, and the growth process of the barnacles will gradually damage the structure of the submarine cable, resulting in water seepage of the submarine cable. Therefore, how to avoid the parasitization of barnacles is also an important research direction of the current part of the submarine cable. SUMMARY

[0005] In order to solve the problem that the current submarine cable mostly cannot effectively cope with the parasitization of marine organisms such as barnacles and the damage to the submarine cable, resulting in a high damage rate of the submarine cable in the near-shore and shallow sea area, the present application provides a submarine optical cable.

[0006] The purpose of the present application is to:

[0007] I. effectively realize the parasitization of harmful marine organisms and the damage to the optical cable;

[0008] II. ensure a certain compression resistance;

[0009] III. be environmentally friendly and not pollute the marine environment.

[0010] In order to achieve the above purpose, the present application adopts the following technical solutions.

[0011] A submarine optical cable comprises:

[0012] an outer sheath, an inner sheath, a multi-layer buffer structure and an optical fiber line at the optical cable axis arranged in sequence from the outside to the inside;

[0013] a repulsion structure layer is arranged between the outer sheath and the inner sheath;

[0014] The avoiding structure layer is filled with a special marine avoiding filler;

[0015] The marine avoiding filler is composed of the following materials:

[0016] Synthetic capsaicin 6-8 parts by weight, tannic acid 4-5 parts by weight, silicon dioxide powder 13-18 parts by weight, 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane 2-4 parts by weight, DC191 resin 15-25 parts by weight, butyl rubber 20-28 parts by weight, 2,5-di-tert-butyl phenol 0.3-0.5 parts by weight, oxidized polyethylene wax 6-8 parts by weight, white oil 45-65 parts by weight and hydrogenated SBS 6-8 parts by weight.

[0017] As a preferred,

[0018] The preparation method of the marine avoiding filler is:

[0019] 1) 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane is added to anhydrous ethanol to prepare a solution, silicon dioxide powder is ultrasonically dispersed, the pH value is adjusted to be acidic, and then dried to obtain a composite powder, the composite powder is mixed with synthetic capsaicin and tannic acid, water is added to immerse the materials, and then centrifugal treatment is performed, followed by filtration and drying to obtain a composite avoiding agent;

[0020] 2) White oil is heated to above 150℃, hydrogenated SBS is added, and then 2,5-di-tert-butyl phenol and oxidized polyethylene wax are added and stirred at a temperature above 150℃ until uniform, and then butyl rubber and DC191 resin are added and stirred until completely mixed, and then the temperature is reduced to below 80℃, the prepared composite avoiding agent is added, and then stirred until uniform, and then discharged to obtain the marine avoiding filler.

[0021] As a preferred,

[0022] The multi-layer buffer structure comprises, from outside to inside, a first compression-resistant buffer layer, a second compression-resistant buffer layer and a third compression-resistant buffer layer.

[0023] As a preferred,

[0024] The first compression-resistant buffer layer and the second compression-resistant buffer layer are arranged in close contact with each other;

[0025] The inner surface of the first compression-resistant buffer layer is provided with a plurality of protrusions arranged along the axial direction of the optical cable, and the plurality of protrusions are uniformly distributed around the circumference of the optical cable;

[0026] The outer surface of the second compression-resistant buffer layer is arranged in close contact with the first compression-resistant buffer layer, and the outer surface thereof is provided with grooves matched with the protrusions, and the protrusions and the grooves are arranged in a nested manner.

[0027] As a preferred,

[0028] The second pressure-resistant buffer layer is provided with a first buffer cavity;

[0029] The first buffer cavity is a regular polygon in the radial cross section of the optical cable, and the number of its sides is equal to the number of protrusions provided in the first pressure-resistant buffer layer, and the corners of the polygon are respectively arranged on the radial inner side of the protrusions.

[0030] As a preferred option

[0031] The third pressure-resistant buffer layer is in the radial cross-section of the optical cable in the shape of a regular polygonal tube with the same number of sides as the first buffer cavity. Its outer corners are chamfered and abut against the edge of the first buffer cavity. Inside it is a second buffer cavity in the shape of a regular polygon with the same number of sides as the first buffer cavity.

[0032] The second buffer cavity and the first buffer cavity are arranged at staggered angles.

[0033] As a preferred option

[0034] The optical fiber is filled and arranged in the wire bundle tube along the optical cable axis. The outer surface of the wire bundle tube is a regular polygon on the radial cross section of the optical cable. The number of its sides is equal to the number of sides of the second buffer cavity, and the corners are chamfered and fitted to the inner wall of the second buffer cavity.

[0035] As a preferred option

[0036] The wire harness tube has a central cavity, and the surface of the central cavity is provided with a water-blocking layer.

[0037] The beneficial effects of this invention are:

[0038] Based on previous research on biological repellency optical cables, this invention has developed and used a specific marine repellency filler that can effectively repel marine organisms. Furthermore, the repellency-repelling active ingredients in this filler are highly stable, not prone to leakage, and environmentally friendly. At the same time, the multi-layered compressive strength structure ensures that the submarine cable has good compressive strength. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the axial structure of the present invention;

[0041] Figure 3 This describes the deformation trend of the first and second compressive buffer layers in this invention.

[0042] In the figure: 100 outer sheath, 200 inner sheath, 300 repulsion structure layer, 400 first compression buffer layer, 401 protrusion, 500 second compression buffer layer, 501 groove, 502 first buffer cavity, 600 third compression buffer layer, 601 second buffer cavity, 700 wire bundle tube, 701 shaft cavity, 702 water blocking layer, 800 optical fiber wire. DETAILED DESCRIPTION

[0043] The present application will be further described in greater detail by way of specific embodiments and with reference to the attached drawings. Those skilled in the art will be able to make and use the present application based on the description and drawings. In addition, the embodiments of the present application described in the following description are merely exemplary embodiments of the present application and are not intended to be limiting. Therefore, the scope of the present application is not limited to the embodiments described herein. Rather, the scope of the present application encompasses all possible embodiments that would be apparent to those skilled in the art.

[0044] In the description of the present application, it should be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited, and the meaning of "several" is one or more.

[0045] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Unless otherwise specified, the raw materials used in the embodiments of the present application are commercially available or obtainable by those skilled in the art. Unless otherwise specified, the methods used in the embodiments of the present application are methods mastered by those skilled in the art.

[0047] EMBODIMENT

[0048] A submarine optical cable as shown in Figure 1 , specifically comprising:

[0049] The outer sheath 100, the inner sheath 200, the multi-layer buffer structure and the optical fiber line 800 at the axis of the optical cable are sequentially arranged from outside to inside;

[0050] The outer sheath 100 and the inner sheath 200 are provided with an avoiding structure layer 300;

[0051] The avoiding structure layer 300 is used for realizing biological avoidance of the submarine optical cable, so as to prolong the service life of the submarine optical cable;

[0052] Specifically,

[0053] With the further development and expansion of the communication network, more and more submarine optical cables are laid and used, and the submarine optical cables also face more and more problems;

[0054] For example, in the shallow sea area, the most common damage form of the submarine optical cable is not the damage caused by the water pressure, but the surface damage caused by the marine organisms. After the surface damage, the internal structure is quickly aged by contacting seawater, causing a chain damage phenomenon. For this, the conventional processing method is mostly to set a high-hardness armored structure. Although this armored structure has obvious effect on fish biting, it has poor protection effect on some special marine organisms, and even cannot form effective protection.

[0055] For example, the barnacle is a common marine organism in the shallow sea area. As a parasitic marine organism, the barnacle has become one of the important damage sources of the submarine optical cable. After parasitization, it can cause rapid damage and aging of the surface of the submarine optical cable, and its reproduction efficiency is very high, which can easily reproduce and grow rapidly after attaching to a single point. The armored structure cannot effectively prevent the barnacle from damaging the submarine optical cable due to the existence of pores.

[0056] For this, the application sets a special avoiding structure layer 300;

[0057] The avoiding structure layer 300 is specifically filled with a special marine avoiding filler;

[0058] The marine avoiding filler comprises the following components:

[0059] 6-8 parts by weight of synthetic capsaicin, 4-5 parts by weight of tannic acid, 13-18 parts by weight of 80-300 mesh silicon dioxide powder, 2-4 parts by weight of 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane, 15-25 parts by weight of DC191 resin, 20-28 parts by weight of butyl rubber, 0.3-0.5 parts by weight of 2, 5-di-tert-butyl phenol, 6-8 parts by weight of oxidized polyethylene wax, 45-65 parts by weight of white oil and 6-8 parts by weight of hydrogenated SBS;

[0060] Specifically, in the embodiment, 8 parts by weight of synthetic capsaicin, 5 parts by weight of tannic acid, 17 parts by weight of 200-mesh silicon dioxide powder, 3 parts by weight of 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane, 20 parts by weight of DC191 resin, 22 parts by weight of butyl rubber, 0.5 parts by weight of 2,5-di-tert-butyl-p-cresol, 8 parts by weight of oxidized polyethylene wax, 60 parts by weight of white oil, and 8 parts by weight of hydrogenated SBS are selected.

[0061] The above-mentioned proportions are used to specifically prepare the following process:

[0062] 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane is added to anhydrous ethanol to prepare a 3wt% solution, and the silicon dioxide powder is ultrasonically dispersed for 2h, then anhydrous acetic acid is added to adjust the pH value to 4, and the composite powder is dried at 60℃ to obtain a composite powder, the composite powder and synthetic capsaicin and tannic acid are mixed, water is added to immerse the material, and then centrifugal treatment is carried out at a speed of 600r / min, followed by filtration and drying to obtain a composite repellent, then the white oil is heated to above 150℃, the hydrogenated SBS is added, and the mixture is uniformly mixed, then 2,5-di-tert-butyl-p-cresol and oxidized polyethylene wax are added and stirred at a temperature above 150℃ until the mixture is uniformly mixed, then butyl rubber and DC191 resin are added and stirred until they are completely mixed, then the temperature is reduced to below 80℃, the prepared composite repellent is added, and the mixture is uniformly stirred and then discharged to obtain the marine repellent filler.

[0063] The marine repellent filler has good aging resistance and viscosity, can be used as a binder while having the function of repelling marine organisms, can rapidly solidify to a certain extent on the surface after the outer sheath 100 is damaged and the repellent structure layer 300 is exposed to the seawater environment, can prevent the loss of capsaicin and tannic acid, and can form a molecular crosslinking network to capture and fix synthetic capsaicin and tannic acid by combining 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane with silicon dioxide, mixing synthetic capsaicin and tannic acid, and placing them in water to hydrolyze, the crosslinking network formed has hydrophobicity, the silicon dioxide particles have hydrophilicity, the silicon dioxide powder can gradually fill the damage of the outer sheath 100 when exposed to the seawater environment, can form solidification protection while preventing seawater from entering the repellent structure layer 300, on the other hand, synthetic capsaicin and tannic acid are also wrapped by the joint action of 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane and silicon dioxide, and are not easy to lose when exposed to seawater.

[0064] The barnacle parasites will gradually destroy the outer sheath 100, and after the outer sheath 100 is destroyed, the barnacle parasites enter the repelling structure layer 300, and the synthetic capsaicin first produces a repelling effect to avoid the barnacle from deep parasitizing and breeding, and the tannic acid can inhibit the growth and development of the barnacle, so that the damage of the barnacle to the optical cable can be greatly reduced, so that a good marine biological repelling effect is produced. Similarly, the synthetic capsaicin has a wide repelling effect on organisms, and can also effectively achieve the effect of preventing fish from biting.

[0065] Biological repelling tests were carried out, three 2m*2m*2m size full transparent glass rooms were set up, 5 test cables with a length of 1.5m were set up at a height of 0.35m, and an equal amount of seaweed was evenly laid on the surface of each test cable as an attachment base, 1.8m deep seawater was injected, and the test was carried out in a light-proof environment to carry out juvenile repelling test and adult repelling test.

[0066] The juvenile repelling test uses optical cable as attachment base to attach wild barnacle nauplii, the initial attachment number of each optical cable is the same, the selected nauplii activity is the same, the attachment rate is observed after 3 weeks of cultivation, and the detachment rate of nauplii is observed after 5 weeks of cultivation;

[0067] The adult repelling test uses optical cable as attachment base to attach wild barnacle adults, the initial attachment number of each optical cable is the same, the selected barnacle adults activity is the same, the detachment rate of barnacle adults is observed after 5 weeks of cultivation;

[0068] After the above two groups of tests are completed, the optical cable is dried and cut at the attachment place to observe the internal water penetration condition of the attachment place.

[0069] The test results are shown in Table 1 below.

[0070] Table 1: Juvenile repelling test and adult repelling test results.

[0071]

[0072] From the above test results, it can be seen that the optical cable of the present application has good avoidance effect on both the larvae and adults of barnacles. In terms of the attachment rate of larvae, there is no significant difference between the present application and the conventional commercially available submarine cable, indicating that the effective components of the marine avoidance filler do not directly escape into the seawater environment, thus having good environmental friendliness and not directly causing pollution. In the larva detachment test, it can be seen that after 3 weeks of development, the larvae grow into gland larva, which begins to secrete a certain amount of mucus and glue and begins to metamorphosis. During metamorphosis, the surface of the optical cable is easily damaged, extending to the inside of the optical cable, resulting in surface damage at the attachment site. After the barnacles come into contact with the marine avoidance filler, they are stimulated by capsaicin and tannic acid and detach from the optical cable. The hard stone-like structure formed on the surface of the optical cable of the present application at the attachment site seals the damage. It has been verified that this part is hardened and repaired by the marine avoidance filler. This is because the difference in hydrophobicity between the cross-linked network and the silica particles causes the silica particles to segregate and enrich at the damage site. Under the action of the mucus secreted by the barnacles, a stone-like structure is formed, which has good self-repairing and water-repellent ability. The commercially available submarine cable is not detached in time, and the gland larva continues to grow and damage the surface of the submarine cable. After cutting the attachment site, slight water seepage is observed.

[0073] From the adult test, it can be seen that the detachment rate of adults is higher than that of larvae. This is because the adults have good biological activity and are more likely to be stimulated by the marine avoidance filler. The shell is also more likely to damage the outer sheath 100 of the optical cable surface, thus causing more stimulation by capsaicin and tannic acid, and then spontaneously detaching from the surface of the optical cable. Although the attachment of gland larvae is the main in the marine environment, the attachment of adults is inevitable and can cause more harm due to their strong reproductive ability. Therefore, the ability to resist the attachment of adults is also very important. In addition, from the comparison of commercially available submarine cables, it can be seen that the harm of adult barnacles to submarine cables is significantly greater than that of larvae, causing more obvious damage to the outer surface of the submarine cable. After cutting, it is observed that there is obvious water seepage inside. Therefore, conventional submarine cables need to have multiple layers of waterproof structure. However, with the attachment and reproduction of barnacles, it can be predicted that the inner waterproof structure will eventually be damaged, causing water seepage in the core. This is one of the performances of general barnacles causing serious damage to submarine cables.

[0074] Further,

[0075] The multi-layer buffer structure includes a first pressure-resistant buffer layer 400, a second pressure-resistant buffer layer 500, and a third pressure-resistant buffer layer 600.

[0076] The inner sheath 200 is arranged on the outside of the first pressure-resistant buffer layer 400, the first pressure-resistant buffer layer 400 and the second pressure-resistant buffer layer 500 are arranged in close contact with each other, the inner surface of the first pressure-resistant buffer layer 400 is provided with a plurality of protrusions 401 arranged along the axial direction of the optical cable, the protrusions 401 are in the form of ribs as shown in Figure 2 A plurality of protrusions 401 are uniformly distributed around the circumference of the optical cable, the outer surface of the second pressure-resistant buffer layer 500 is arranged in close contact with the first pressure-resistant buffer layer 400, and the outer surface thereof is provided with recesses 501 corresponding to the protrusions 401, and the two are arranged in close contact with each other;

[0077] The arrangement of the protrusions 401 can enhance the rigidity of the first pressure-resistant buffer layer 400 in the radial direction, and the arrangement of the recesses 501 can weaken the rigidity of the second pressure-resistant buffer layer 500 in the radial direction to a certain extent, the second pressure-resistant buffer layer 500 is provided with a first buffer cavity 502, the first buffer cavity 502 is in the form of a regular polygon in the radial cross-section of the optical cable, the number of sides of the regular polygon is equal to the number of protrusions 401 of the first pressure-resistant buffer layer 400, and the corner portions of the regular polygon are arranged on the radial inner side of the protrusions 401;

[0078] As shown in Figure 3 Under the cooperation of the above structure, when subjected to the static pressure of the ocean and the load pressure of marine organisms, the first pressure-resistant buffer layer 400 and the second pressure-resistant buffer layer 500 can form preferential deformation along the radial direction of the protrusions 401 after cooperating with each other, because the arrangement of the recesses 501 and the special structure of the first buffer cavity 502 of the second pressure-resistant buffer layer 500 weaken the rigidity of the second pressure-resistant buffer layer 500 in the radial direction of the protrusions 401, so that this part can serve as the main stress point, but at the same time, the protrusions 401 of the first pressure-resistant buffer layer 400 increase the rigidity of this part, so that the pressure deformation resistance of this part is improved, thereby reducing the actual deformation;

[0079] In addition, the third pressure-resistant buffer layer 600 is arranged on the inner side of the second pressure-resistant buffer layer 500, the third pressure-resistant buffer layer 600 is in the form of a regular polygon tube with a number of sides equal to that of the first buffer cavity 502 in the radial cross-section of the optical cable, the outer corner portions thereof are chamfered and abut against the side portions of the first buffer cavity 502, and the inner side thereof is provided with a second buffer cavity 601 in the form of a regular polygon with a number of sides equal to that of the first buffer cavity 502 and staggered with the first buffer cavity 502;

[0080] Under the cooperation of the above structure, since preferential deformation will occur in the radial direction corresponding to the protrusions 401, the unique structure of the third pressure-resistant buffer layer 600 arranged in cooperation can effectively avoid direct stress on the third pressure-resistant buffer layer 600, further protecting the inside, especially in the case of parasitic attachment of marine organisms, the optical fiber line 800 inside can be more effectively protected from direct stress.

[0081] The optical fiber line 800 is arranged in the line bundle tube 700 along the cable axial direction, the line bundle tube 700 is a regular polygon in the outer surface in the radial cross section of the cable, the number of sides is equal to the number of sides of the first buffer cavity 502 and the second buffer cavity 601, and the corner is chamfered and arranged on the inner wall of the second buffer cavity 601, and the center is provided with the axial cavity 701, and the surface of the axial cavity 701 is provided with the water blocking layer 702.

[0082] Through the above-mentioned multi-layer buffer structure, the submarine cable has more excellent compression resistance.

Claims

1. A submarine optical cable, characterized by, The application relates to a submarine optical cable. The outer sheath, the inner sheath, the multi-layer buffer structure and the optical fiber line at the optical cable axis are sequentially arranged from outside to inside. The repulsion structure layer is arranged between the outer sheath and the inner sheath. The repulsion structure layer is filled with special marine repulsion fillers. The marine repulsion fillers are composed of the following materials: 6-8 parts of synthetic capsaicin, 4-5 parts of tannic acid, 13-18 parts of silicon dioxide powder, 2-4 parts of 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane, 15-25 parts of DC191 resin, 20-28 parts of butyl rubber, 0.3-0.5 parts of 2,5-di-tert-butyl-p-cresol, 6-8 parts of oxidized polyethylene wax, 45-65 parts of white oil and 6-8 parts of hydrogenated SBS. The multi-layer buffer structure comprises a first pressure-resistant buffer layer, a second pressure-resistant buffer layer and a third pressure-resistant buffer layer which are sequentially arranged from outside to inside. The first pressure-resistant buffer layer and the second pressure-resistant buffer layer are arranged in close contact with each other. The inner surface of the first pressure-resistant buffer layer is provided with a plurality of protrusions arranged along the axial direction of the optical cable, and the plurality of protrusions are uniformly distributed around the circumference of the optical cable. The outer surface of the second pressure-resistant buffer layer is arranged in close contact with the first pressure-resistant buffer layer, and the outer surface of the second pressure-resistant buffer layer is provided with grooves corresponding to the protrusions, and the protrusions and the grooves are arranged in close contact with each other. The first buffer cavity is arranged in the second pressure-resistant buffer layer. The first buffer cavity is a regular polygon in the radial cross section of the optical cable, and the number of sides of the first buffer cavity is equal to the number of protrusions arranged on the first pressure-resistant buffer layer, and the corner parts of the first buffer cavity are arranged on the inner side of the protrusions in the radial direction. The third pressure-resistant buffer layer is a regular polygon tube in the radial cross section of the optical cable, and the number of sides of the third pressure-resistant buffer layer is equal to the number of sides of the first buffer cavity, and the outer corner parts of the third pressure-resistant buffer layer are chamfered and abutted on the side parts of the first buffer cavity, and the inner part of the third pressure-resistant buffer layer is provided with a second buffer cavity which is a regular polygon and has a number of sides equal to that of the first buffer cavity. The second buffer cavity and the first buffer cavity are arranged in an angle staggered manner.

2. The submarine optical cable according to claim 1, wherein the preparation method of the marine repulsion filler is as follows: 1) 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane is added to anhydrous ethanol to prepare a solution, and then the solution is ultrasonically dispersed after the addition of silicon dioxide powder, and the pH value is adjusted to be acidic, and then the solution is dried to obtain a composite powder, the composite powder is mixed with synthetic capsaicin and tannic acid, and then the mixture is soaked in water and subjected to centrifugal treatment, and then the mixture is filtered and dried to obtain a composite repulsion agent; 2) white oil is heated to 150 DEG C or above, and then hydrogenated SBS is added, and then the mixture is uniformly mixed, and then 2,5-di-tert-butyl-p-cresol and oxidized polyethylene wax are added and stirred at a temperature of 150 DEG C or above until the mixture is uniformly mixed, and then butyl rubber and DC191 resin are added and stirred until the mixture is uniformly mixed, and then the temperature is reduced to 80 DEG C or below, and then the prepared composite repulsion agent is added, and then the mixture is uniformly stirred and discharged to obtain the marine repulsion filler.

3. The submarine optical cable according to claim 1, wherein the optical fiber line is arranged in the wire bundle tube in the axial direction of the optical cable, and the outer surface of the wire bundle tube is a regular polygon in the radial cross section of the optical cable, and the number of sides of the wire bundle tube is equal to the number of sides of the second buffer cavity, and the corner parts of the wire bundle tube are chamfered and arranged in close contact with the inner wall of the second buffer cavity. ​ ​ ​ 4. The submarine cable according to claim 3, wherein the cable tube is provided with an axial cavity, and a water-blocking layer is arranged on the surface of the axial cavity. ​

Images