CN203192455U - A flame-retardant and fire-resistant marine overall shielded instrument cable - Google Patents

Abstract

The utility model relates to a flame-retardant and fire-resistant marine overall shielded instrument cable. The outer periphery of the stranded copper conductor is extruded with a flame-retardant and fire-resistant ethylene-propylene rubber insulating layer to form an insulating core, and the insulating cores are twisted in pairs to form a pair of twisted wires. The gaps of the twisted wire pairs are filled with flame-retardant non-hygroscopic fiber cores, and multiple pairs of twisted wire pairs are twisted to form a cable core. and copper foil polyester composite tape shielding layer, the inner side of the copper foil polyester composite tape shielding layer is provided with tinned stranded copper wire drain wire, the outer periphery of the copper foil polyester composite tape shielding layer is covered with an armored braiding layer, and the armored The outer periphery of the braided layer is extruded with an outer sheath. The longitudinal cladding of low-strength non-woven fabric completely conforms to the shape of the cable core, eliminating the gap between the longitudinal cladding of low-strength non-woven fabric and the cable core, which is convenient to prevent the flame from extending inward; There is no adhesion between the cores, so that the insulated cores will not be damaged when the sheath is stripped off during the construction process.

Description

A flame-retardant and fire-resistant marine overall shielded instrument cable

technical field

The utility model relates to an integrally shielded instrument cable, in particular to an integrally shielded instrument cable for flame-retardant and fire-resistant ships.

Background technique

At present, fire-resistant marine overall shielded instrument cables generally adopt several structures such as mica tape wrapped conductor, mineral insulation, and extruded refractory silicone rubber outer braided glass fiber wire combination insulation, etc., but these types of fire-resistant cables have great disadvantages:

Mica tape wrapped fire-resistant cables are wrapped with mica tapes overlapping outside the conductor. Due to the large number of cores in marine cables, wrapping with mica tapes will result in large outer diameter and heavy weight of the finished cable, which is not conducive to ship loads.

The remarkable feature of mineral insulated cables is that the conductor is covered with a layer of inorganic refractory mineral insulating layer to achieve fire resistance. It has excellent fire resistance, but its laying efficiency is low, and its bending performance is very poor, which cannot meet the flexibility requirements of the cable in the narrow space of the ship. Moreover, the manufacturing process of the cable head terminal is complicated, and the cable manufacturing cost is expensive.

Fire-resistant silicone rubber outer braided glass fiber wire combined insulation fire-resistant cable, the fire-resistant layer is a double composite structure, the inner layer is extruded ceramizable silicone rubber refractory layer, and the outer layer is flame-retardant glass fiber wire braided layer. The base material of ceramizable silicone rubber is silicone rubber, the main components are organic silicon and inorganic silicon dioxide, and it is combined with ceramic powder and environmentally friendly refractory agent. It is soft at room temperature and has excellent processing performance, but when the combustion temperature exceeds 600°C, it will be sintered in a short time to form a hard ceramic shell. The ceramic-shaped shell is calcined by high-temperature flames to produce hard silica ceramics with a temperature resistance of not less than 1100°C, which can insulate and block the flame from continuing to burn, thus playing the role of fire prevention. However, the gravitational force between the ceramizable silicone rubber molecules is small, and it has an amorphous structure, and its physical and mechanical properties are very poor. According to the provisions of "Flexible Cord", refractory glass fiber wire must be braided outside the silicone rubber insulation to enhance the mechanical properties, which makes the structure and production process of the finished cable complicated; and the high temperature water vapor resistance and acid and alkali resistance of silicone rubber are poor, which is not conducive to the ship's equipment. It is used in acid and alkali corrosion environment; in addition, silicone rubber is expensive and does not meet the economic requirements of the product.

If the outer periphery of the cable core is directly extruded with the inner sheath, the inner sheath will be bonded to the surface of the insulated wire core, making it difficult to remove during construction, and it is easy to damage the insulated wire core when cutting with an electrician's knife; A wrapping tape is wound along the circumferential direction of the cable core. Since a wrapping tape is continuously wound along the circumferential direction of the cable core, the tension of the wrapping tape is relatively large during winding, and the wrapping tape between two adjacent insulated cores is The wire core is wound in the direction of the common tangent line, so there is a gap between the wrapping tape and the insulated core. Since the wrapping tape is tightly stretched, the inner sheath cannot be eliminated when the wrapping tape is wrapped around the outer periphery of the wrapping tape. And this gap can become a channel for the flame to spread forward.

Utility model content

The purpose of this utility model is to overcome the problems existing in the prior art, and provide a flame-retardant and fire-resistant marine overall shielded instrument cable, which has good flame-retardant performance, no adhesion between the inner sheath and the cable core, and is convenient for stripping the sheath during construction. Do not damage the insulated wire core when covering.

In order to achieve the above objectives, the utility model provides a flame-retardant and fire-resistant marine overall shielded instrument cable. The outer periphery of the stranded copper conductor is extruded with a flame-retardant and fire-resistant ethylene-propylene rubber insulating layer to form an insulating core, and the insulating cores are twisted in pairs. A pair of twisted wires is formed, and the gaps of the pair of twisted wires are filled with a flame-retardant non-hygroscopic fiber core, and each pair of the twisted wires adopts a different twisting pitch, and multiple sets of the twisted wire pairs Twisted to form a cable core, the outer periphery of the cable core is wrapped with a low-strength non-woven longitudinal cladding, the outer periphery of the low-strength non-woven longitudinal cladding is extruded with an inner sheath, and the outer periphery of the inner sheath is wrapped Wrapped with a copper foil polyester composite tape shielding layer and the copper foil faces inward, the inner side of the copper foil polyester composite tape shielding layer is provided with a tinned stranded copper wire drainage wire, and the tinned stranded copper wire drainage wire runs through The entire length of the cable core is close to the copper foil surface; the outer periphery of the copper foil polyester composite tape shielding layer is covered with an armored braided layer, and the outer periphery of the armored braided layer is extruded with an outer sheath.

Compared with the prior art, the utility model has achieved the following beneficial effects: the cable of the utility model adopts the longitudinal cladding of low-strength non-woven fabric, and the feature of the longitudinal cladding can only be that the non-woven fabric of a certain width is divided into several sections, along which The axial direction of the cable core is wrapped one by one. The tension of the low-strength non-woven longitudinal cladding in the circumferential direction is very small. When the inner sheath is squeezed, it is easy to press the low-strength non-woven longitudinal cladding on the outer surface of the insulating core. That is, the shape of the longitudinal cladding of the low-strength non-woven fabric completely matches the shape of the insulated wire core, eliminating the gap between the longitudinal cladding of the low-strength non-woven fabric and the insulating wire core, which is convenient for preventing the flame from extending to the inside under burning conditions transmission, and can enhance the resistance to moisture impregnation; at the same time, the low-strength non-woven longitudinal cladding can ensure that there is no adhesion between the inner sheath and the insulated wire core, so that the insulated wire core is not damaged when the sheath is stripped during the construction process; the shielding layer is in the The outside of the inner sheath ensures that the shielding is not subject to the inward pressure of the inner sheath, ensures the overall continuity of the copper foil in the shielding material, and is conducive to the realization of the shielding effect.

As a preferred solution of the present utility model, the thickness of the longitudinal cladding of the low-strength non-woven fabric is 0.05-0.1mm, and the longitudinal cladding is sequentially overlapped along the axis of the cable core, and the longitudinal cladding of the low-strength non-woven fabric in each section is The width is 3.5~3.8 times the diameter of the cable core.

Description of drawings

Fig. 1 is a structural schematic diagram of a flame-retardant and fire-resistant marine overall shielded instrument cable of the present invention.

In the figure: 1. Insulated wire core; 1a. Stranded copper conductor; 1b. Flame-retardant and fire-resistant ethylene-propylene rubber insulation layer; 2. Flame-retardant non-hygroscopic fiber core; 3. Longitudinal cladding of low-strength non-woven fabric; 4 .Inner sheath; 5. Copper foil polyester composite tape shielding layer; 5a. Tinned stranded copper wire drainage wire; 6. Armored braiding layer; 7. Outer sheath. the

Detailed ways

Embodiment one

As shown in Figure 1, the overall shielded instrument cable for flame-retardant and fire-resistant ships of the present utility model includes the following steps in turn: extrude the outer periphery of the stranded copper conductor 1a to wrap the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer 1b to form the insulating core 1, and the insulating wire The core 1 is twisted in pairs to form a pair of twisted wires, and the gap between the pair of twisted wires is filled with a flame-retardant non-hygroscopic fiber core 2, each pair of twisted wires adopts a different twisting pitch, and multiple pairs are twisted Wire pairs are twisted to form a cable core, and the outer periphery of the cable core is wrapped with a low-strength non-woven longitudinal cladding 3, and then an inner sheath 4 is extruded on the outer periphery of the low-strength non-woven longitudinal cladding 3, and the inner sheath 4 The outer circumference is wrapped with copper foil polyester composite tape shielding layer 5 and the copper foil faces inward. The inner side of the copper foil polyester composite tape shielding layer 5 is provided with a tinned stranded copper wire drain wire 5a, and a tinned stranded copper wire drain wire 5a Run through the entire length of the cable core and close to the copper foil surface; then braid the armor braid 6 on the outer periphery of the copper foil polyester composite tape shielding layer 5, and finally extrude the outer sheath 7 on the outer periphery of the armor braid 6 . The thickness of the low-strength non-woven longitudinal cladding 3 is 0.05mm, and the longitudinal cladding is sequentially overlapped along the axis of the cable core. The width of each segment of the low-strength non-woven longitudinal cladding is 3.5 times the diameter of the cable core. Both the inner sheath 4 and the outer sheath 7 are made of a flexible and highly flame-resistant sheathing material with an oxygen index not lower than 32.

Among them, the preparation steps of the insulating rubber used in the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer are as follows: (1) Prepare raw materials according to the following components and weight content, EPDM rubber 4045M: 20 parts; vulcanizing agent dicumyl peroxide ( Vulcanizing agent DCP): 0.5 parts; co-curing agent triallyl cyanurate (co-curing agent TAC): 0.2 parts; anti-aging agent 2-mercaptobenzimidazole (anti-aging agent MB): 0.1 parts; anti-aging agent 2,2,4-trimethyl-1,2-dihydroquinoline polymer (antiaging agent RD): 0.1 part; coupling agent vinyl tris(β-methoxyethoxy)silane (silane coupling agent A-172): 0.1 parts; flame retardant aluminum hydroxide (that is, Al ₂ O ₃ 3H ₂ O hydrated alumina): 15 parts; refractory agent ceramic glass powder: 3 parts; plasticizer No. 1000 steam cylinder oil : 1 part; filler fine talcum powder: 6 parts; reinforcing agent hydrated silica: 4 parts; reinforcing agent calcined clay: 5 parts.

(2) First raise the temperature of the internal mixer to 160°C, then add EPDM rubber 4045M and mix for 1 minute, then add the above-mentioned anti-aging agent 2-mercaptobenzimidazole, anti-aging agent 2,2,4- Trimethyl-1,2-dihydroquinoline polymer, coupling agent vinyl tris(β-methoxyethoxy)silane, flame retardant aluminum hydroxide, fire-resistant ceramic glass powder, plasticizer 1000 No. steam cylinder oil, filler fine talc powder, reinforcing agent hydrated silica and reinforcing agent calcined clay, mixed for 7 minutes, unloaded, and left in a dry and clean space for more than 24 hours; put the rubber into Mix on an internal mixer at a temperature of 80°C for another 2 minutes, and add the vulcanizing agent dicumyl peroxide and co-vulcanizing agent triallyl cyanurate in the last 20 seconds, and put the mixed material on three rolls for kneading Machine is carried out thin pass, and the roller pitch of three-roller mill is 1.5mm, and each four times of beating triangular bag and square bag are discharged sheet standby.

When the insulating rubber is extruded, the extruder adopts the cold feeding method, the length-to-diameter ratio of the extruder screw is 15:1, the body temperature is 55°C, the head temperature is 90°C, and the mold temperature is 120°C. The cooling method of the machine screw is water cooling, the ratio of the length of the core line of the extrusion die to the outer diameter of the extrusion is 1: 1, and the length of the shaping section of the die sleeve is 2mm.

Embodiment two

As shown in Figure 1, the overall shielded instrument cable for flame-retardant and fire-resistant ships of the present utility model includes the following steps in turn: extrude the outer periphery of the stranded copper conductor 1a to wrap the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer 1b to form the insulating core 1, and the insulating wire The core 1 is twisted in pairs to form a pair of twisted wires, and the gap between the pair of twisted wires is filled with a flame-retardant non-hygroscopic fiber core 2, each pair of twisted wires adopts a different twisting pitch, and multiple pairs are twisted Wire pairs are twisted to form a cable core, and the outer periphery of the cable core is wrapped with a low-strength non-woven longitudinal cladding 3, and then an inner sheath 4 is extruded on the outer periphery of the low-strength non-woven longitudinal cladding 3, and the inner sheath 4 The outer circumference is wrapped with copper foil polyester composite tape shielding layer 5 and the copper foil faces inward. The inner side of the copper foil polyester composite tape shielding layer 5 is provided with a tinned stranded copper wire drain wire 5a, and a tinned stranded copper wire drain wire 5a Run through the entire length of the cable core and close to the copper foil surface; then braid the armor braid 6 on the outer periphery of the copper foil polyester composite tape shielding layer 5, and finally extrude the outer sheath 7 on the outer periphery of the armor braid 6 . The thickness of the low-strength non-woven longitudinal cladding 3 is 0.08mm, and the longitudinal cladding is sequentially overlapped along the axis of the cable core. The width of each segment of the low-strength non-woven longitudinal cladding is 3.7 times the diameter of the cable core. Both the inner sheath 4 and the outer sheath 7 are made of a flexible and highly flame-retardant sheathing material with an oxygen index not lower than 32.

Among them, the preparation steps of the insulating rubber used in the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer are as follows: (1) Prepare raw materials according to the following components and weight content, EPDM rubber 4045M: 20 parts; vulcanizing agent dicumyl peroxide: 0.55 parts; co-vulcanizing agent triallyl cyanurate: 0.25 parts; anti-aging agent 2-mercaptobenzimidazole: 0.2 parts; anti-aging agent 2,2,4-trimethyl-1,2-dihydrogenation Quinoline polymer: 0.2 parts; coupling agent vinyl tris(β-methoxyethoxy) silane: 0.15 parts; flame retardant aluminum hydroxide: 18 parts; refractory ceramic glass powder: 4 parts; plasticizer Agent No. 1000 steam cylinder oil: 1.2 parts; filler fine talcum powder: 7 parts; reinforcing agent hydrated silica: 5 parts; reinforcing agent calcined clay: 7 parts.

(2) First raise the temperature of the internal mixer to 170°C, then add EPDM rubber 4045M and mix for 1.2 minutes, then add the above-mentioned anti-aging agent 2-mercaptobenzimidazole, anti-aging agent 2,2,4- Trimethyl-1,2-dihydroquinoline polymer, coupling agent vinyl tris(β-methoxyethoxy)silane, flame retardant aluminum hydroxide, fire-resistant ceramic glass powder, plasticizer 1000 No. steam cylinder oil, filler fine talc powder, reinforcing agent hydrated silica and reinforcing agent calcined clay, mixed for 7.5 minutes, unloaded, and left in a dry and clean space for more than 24 hours; put the rubber into Mix on the internal mixer at 90°C for another 2.5 minutes, add the vulcanizing agent dicumyl peroxide and co-vulcanizing agent triallyl cyanurate in the last 20 seconds, and put the mixed material on three rolls for kneading Machine is carried out thin pass, and the roller pitch of three-roller mill is 1.8mm, and each four times of beating triangular bag and square bag are discharged sheet standby.

When the insulating rubber is extruded, the extruder adopts the cold feeding method, the length-to-diameter ratio of the extruder screw is 18:1, the body temperature is 60°C, the head temperature is 95°C, and the mold temperature is 125°C. The cooling method of the machine screw is water cooling, the ratio of the length of the core support line of the extrusion mold to the outer diameter of the extrusion is 1:1.1, and the length of the shaping section of the mold sleeve is 3mm.

Embodiment three

As shown in Figure 1, the overall shielded instrument cable for flame-retardant and fire-resistant ships of the present utility model includes the following steps in turn: extrude the outer periphery of the stranded copper conductor 1a to wrap the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer 1b to form the insulating core 1, and the insulating wire The core 1 is twisted in pairs to form a pair of twisted wires, and the gap between the pair of twisted wires is filled with a flame-retardant non-hygroscopic fiber core 2, each pair of twisted wires adopts a different twisting pitch, and multiple pairs are twisted Wire pairs are twisted to form a cable core, and the outer periphery of the cable core is wrapped with a low-strength non-woven longitudinal cladding 3, and then an inner sheath 4 is extruded on the outer periphery of the low-strength non-woven longitudinal cladding 3, and the inner sheath 4 The outer circumference is wrapped with copper foil polyester composite tape shielding layer 5 and the copper foil faces inward. The inner side of the copper foil polyester composite tape shielding layer 5 is provided with a tinned stranded copper wire drain wire 5a, and a tinned stranded copper wire drain wire 5a Run through the entire length of the cable core and close to the copper foil surface; then braid the armor braid 6 on the outer periphery of the copper foil polyester composite tape shielding layer 5, and finally extrude the outer sheath 7 on the outer periphery of the armor braid 6 . The thickness of the low-strength non-woven longitudinal cladding 3 is 0.1 mm, and the longitudinal cladding is sequentially overlapped along the axis of the cable core. The width of each segment of the low-strength non-woven longitudinal cladding is 3.8 times the diameter of the cable core. Both the inner sheath 4 and the outer sheath 7 are made of a flexible and highly flame-retardant sheathing material with an oxygen index not lower than 32.

Among them, the preparation steps of the insulating rubber used in the flame-retardant and fire-resistant ethylene-propylene rubber insulating layer are as follows: (1) Prepare raw materials according to the following components and weight content, EPDM rubber 4045M: 20 parts; vulcanizing agent dicumyl peroxide: 0.6 parts; co-vulcanizing agent triallyl cyanurate: 0.3 parts; anti-aging agent 2-mercaptobenzimidazole: 0.3 parts; anti-aging agent 2,2,4-trimethyl-1,2-dihydrogenation Quinoline polymer: 0.3 parts; coupling agent vinyl tris(β-methoxyethoxy) silane: 0.2 parts; flame retardant aluminum hydroxide: 20 parts; refractory ceramic glass powder: 6 parts; plasticizer Agent No. 1000 steam cylinder oil: 1.5 parts; filler fine talcum powder: 8 parts; reinforcing agent hydrated silica: 7 parts; reinforcing agent calcined clay: 8 parts.

(2) First raise the temperature of the internal mixer to 180°C, then add EPDM rubber 4045M and mix for 1.5 minutes, then add the above-mentioned anti-aging agent 2-mercaptobenzimidazole, anti-aging agent 2,2,4- Trimethyl-1,2-dihydroquinoline polymer, coupling agent vinyl tris(β-methoxyethoxy)silane, flame retardant aluminum hydroxide, fire-resistant ceramic glass powder, plasticizer 1000 No. steam cylinder oil, filler fine talc powder, reinforcing agent hydrated silica and reinforcing agent calcined clay, mixed for 8 minutes, unloaded, and left in a dry and clean space for more than 24 hours; put the rubber into Mix on an internal mixer at a temperature of 100°C for another 3 minutes, add the vulcanizing agent dicumyl peroxide and co-vulcanizing agent triallyl cyanurate in the last 20 seconds, and put the mixed material on three rolls for kneading Machine is carried out thin pass, and the roller pitch of three-roller mill is 2mm, and each four times of beating triangular bag and square bag are discharged sheet for subsequent use.

When the insulating rubber is extruded, the extruder adopts the cold feeding method, the length-to-diameter ratio of the extruder screw is 20:1, the body temperature is 65°C, the head temperature is 100°C, and the mold temperature is 130°C. The cooling method of the machine screw is water cooling, the ratio of the length of the core line of the extrusion mold to the outer diameter of the extrusion is 1:1.2, and the length of the mold sleeve shaping section is 4mm.

The mechanical performance test results before aging of the insulating rubber in Examples 1 to 3 are shown in Table 1:

Table 1

Table 2 shows the mechanical performance test results of the insulating rubber ovens in Examples 1 to 3. Aging conditions: temperature 135±2° C., time: 168 hours.

Table 2

Table 3 shows the mechanical performance test results of the insulating rubber air elastics in Examples 1 to 3. Aging conditions: temperature 127±1°C, time 40h, pressure 56 N/mm2.

table 3

Table 4 shows the test results of the insulation resistance (at 20° C.) of the insulating rubber in Examples 1 to 3.

Table 4

Table 5 shows the test results of the AC capacitance increase rate of the insulating rubber in Examples 1 to 3 after being immersed in 50°C water. The values recorded in the table are the difference between the 14th day and the 1st day and the 7th day respectively.

table 5

In Embodiment 1 to Embodiment 3, the EPDM 4045M is preferably "Mitsui EPT" brand EPDM 4045M produced by Mitsui Chemicals Co., Ltd. of Japan. The vulcanizing agent dicumyl peroxide (vulcanizing agent DCP) can be selected from Yantai Hengnuo Chemical Technology Co., Ltd. or Shanghai Fangruida Chemicals Co., Ltd. The co-vulcanizing agent triallyl cyanurate (co-vulcanizing agent TAC) can be selected from Yantai Hengnuo Chemical Technology Co., Ltd. or Shanghai Fangruida Chemical Co., Ltd. The anti-aging agent 2-mercaptobenzimidazole (anti-aging agent MB) can be selected from Shanghai Rubber Auxiliaries Factory Co., Ltd. or Qingdao Tenuo Trading Co., Ltd. The anti-aging agent 2,2,4-trimethyl-1,2-dihydroquinoline polymer (anti-aging agent RD) can be selected from the products of Jiangsu Haian Petrochemical Plant or Nanjing Youhao Auxiliary Chemical Co., Ltd. The coupling agent vinyl tris(β-methoxyethoxy)silane (silane coupling agent A-172) can be selected from Nanjing Qianqian Chemical Co., Ltd. or Nanjing Nuojian New Material Co., Ltd. Flame retardant aluminum hydroxide (namely Al ₂ O ₃ ·3H ₂ O hydrated alumina) can be selected from Shijiazhuang Xinyuan Chemical Co., Ltd. or Shenzhen Hongtaiji Industrial Co., Ltd. products. The refractory ceramic glass powder can be selected from the products of Shijiazhuang Yunshi New Building Materials Co., Ltd. Plasticizer No. 1000 steam cylinder oil can be selected from Yancheng Huaqi Petroleum Products Co., Ltd. or Shandong Sunrise Dongfang Petrochemical Co., Ltd. products. The filler fine talcum powder is selected from products that meet the requirements of the "GB 15342-1994 Talc Powder" standard. The reinforcing agent hydrated silica can be selected from the products of Guangzhou Jibisheng Technology Industrial Co., Ltd. or Taicang Xinhong Chemical Co., Ltd. Reinforcing agent calcined clay is the product of Guangzhou Gengda Trading Co., Ltd. or Maoming Maonan Jinpeng Porcelain Clay Factory. The raw materials used in the utility model, except the above manufacturers, can be selected from other similar products that meet the requirements on the market.

The above descriptions are only preferred feasible embodiments of the present utility model, and are not intended to limit the patent protection scope of the present utility model. In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (2)

1. flame-retardant bulk shielding instrument cable peculiar to vessel, it is characterized in that: the twisted copper conductors periphery is extruded with the ethylene propylene rubber insulated layer of flame-retardant and constitutes insulated wire cores, insulated wire cores stranded formation twisted pair wire in twos is right, the right slit of described twisted pair wire is filled with fire-retardant non-hygroscopic fiber and fills out core, the twisting pitch that each described twisted pair wire has nothing in common with each other to employing, the described twisted pair wire strand of many groups constitutes cable core, the periphery of described cable core is enclosed with the vertical covering of low-intensity nonwoven fabrics, the periphery of the vertical covering of described low-intensity nonwoven fabrics is extruded with inner sheath, the periphery of described inner sheath be surrounded with Copper Foil polyester composite band screen and copper-clad surface inside, the inboard of described Copper Foil polyester composite band screen is provided with zinc-plated stranded copper wire drainage thread, and described zinc-plated stranded copper wire drainage thread runs through the cable core overall length and abuts against with copper-clad surface; The periphery of described Copper Foil polyester composite band screen is coated with the armouring braid, and the periphery of described armouring braid is extruded with oversheath.

2. flame-retardant according to claim 1 bulk shielding instrument cable peculiar to vessel, it is characterized in that, the thickness of the vertical covering of described low-intensity nonwoven fabrics is 0.05 ~ 0.1mm, overlap vertical bag successively along the cable core axis direction, the width of every section vertical covering of described low-intensity nonwoven fabrics is 3.5 ~ 3.8 times of cable core diameter.

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