KR101476996B1 - Cables for ship and ocean using CCA conduct and CCAM braid - Google Patents

Abstract

The present invention relates to a ship and a marine cable, and more particularly, to a cable for marine and marine cables, which comprises a core wire conductor, an insulation layer which can insulate the core wire conductor, an aggregate of a core conductor coated with the insulation layer and a filler, A primary sheath surrounding the primary sheath, and a secondary sheath surrounding the primary sheath, the secondary sheath surrounding the primary sheath, wherein the strand is braided by copper coating an alloy wire comprising aluminum, magnesium and iron Ships that have excellent flexibility and stiffness at various temperature changes while reducing cost by significantly reducing weight, and exhibiting thermal deformation, oil resistance, flame retardancy, water resistance, and corrosion resistance to salt. Provide marine cables.

Description

{Cables for ship and ocean using CCA conductor and CCAM braid}

The present invention relates to ships and marine cables.

Cables used in ships and offshore are more susceptible to harsh environments, such as extreme temperature changes, oil contact, and submersion in seawater, compared to general land cables. Therefore, ships and marine cables are required to have flexibility, stiffness, heat distortion, stain resistance, flame retardancy, and water resistance, and corrosion resistance to salt. In addition, lightness is also required to load more people and goods.

In order to satisfy various physical properties as described above, the compositional components of the conductor, insulating layer, braided layer or sheath in the cable are important.

As a result, the conductor used mainly copper, which is expensive nonferrous metal, puts a burden on the weight and causes an increase in cost cost. Korean Patent Publication No. 2010-0132289 discloses that it is possible to reduce the weight and the manufacturing cost by providing the copper-clad aluminum wire.

As the other component, a halogen-containing polymer resin such as ethylene propylene rubber, crosslinked polyethylene, chloroprene rubber, chlorosulfonation, polyethylene, chlorinated polyethylene and the like is generally used as the resin including the insulating layer in the cable. Resin is required.

As another component, the metal braided layer is provided in a braided structure by metal such as copper or iron, which causes a burden on the load and raises the cost of the raw material. Further, such a braided layer is surrounded by an inner sheath or an outer sheath to protect the cable from an external impact, and it is difficult to carry out a working operation for this purpose and is not easy to handle, and there is a fear that power leakage may occur between the conductor and the metal braided layer have. Therefore, there is a problem in that a metal braid layer is provided and a thicker thickness design is used to increase the strength, which leads to an increase in weight as well as an increase in cost, and an excessive strength is imparted to the metal braid layer.

Korean Patent Publication No. 2009-0132289 (December 30, 2009)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a polyurethane foam which is excellent in flexibility and stiffness in various temperature ranges, exhibits thermal deformation, oil resistance, flame retardancy and water resistance, And to provide a lightweight vessel and marine cable excellent in electric conductivity.

The present invention relates to a laminate comprising an insulation layer capable of insulation-coating a core wire conductor and the core wire conductor, an aggregate formed by combining the core wire conductor and the filler coated with the insulation layer, a primary sheath surrounding the aggregate, And a secondary sheath surrounding the braided layer, wherein the braided layer is formed by copper braiding and braiding of an alloy wire comprising aluminum, magnesium, and iron, thereby exposing the braided layer to salt water containing salinity, Provides ships and marine cables that can reduce cost by having excellent rigidity, flexibility and durability in a rolling environment while reducing weight.

In the ship and marine cable according to an embodiment of the present invention, the alloy wire may further include at least one metal selected from silicon, chromium, and manganese.

In one preferred embodiment of the alloy wire according to one embodiment of the present invention, any one metal selected from aluminum, magnesium, iron, silicon, chromium, manganese, copper, zinc, Can be used.

In the ship and marine cable according to one embodiment of the present invention, the alloy wire of the braided layer contains 50 to 98.9% by weight of aluminum, 1 to 30% by weight of magnesium and 0.01 to 20% by weight of iron.

In the ship and marine cable according to one embodiment of the present invention, the alloy wire of the braided layer is composed of 50 to 98.9 wt% of aluminum, 1 to 30 wt% of magnesium, 0.01 to 20 wt% of iron, 0.01 to 5 wt% More preferably 0.01 to 5% by weight of chromium, 0.01 to 5% by weight of manganese, 0.001 to 5% by weight of copper and 0.001 to 5% by weight of zinc.

In the ship and marine cable according to an embodiment of the present invention, the core conductor may be copper clad aluminum. The copper clad aluminum (CCA) can reduce weight and durability by minimizing copper, which is an expensive non-ferrous metal, and reduce manufacturing cost. At this time, the copper content is preferably 5 to 40% by weight, more preferably 15 to 20% by weight. If the content exceeds the above range, the weight will increase and the cost will increase. If the content is below the range, the conductivity decreases and the conductor cross-sectional area will increase.

In a ship and marine cable according to an embodiment of the present invention, the thickness of the braided layer is 0.1 to 5% of the total diameter of the cable depending on the use for power or control and instrumentation.

In the cable for ships and marine cables according to an embodiment of the present invention, the insulating layer can insulate the core conductor for supplying power and has an insulation resistance of 1 x 10 ¹⁵ Ω · cm or more, Layer composition may be used.

The insulating layer preferably includes low density polyethylene, an inorganic filler, and a crosslinking agent.

The insulating layer is preferably used in an amount of 50 to 200 parts by weight of an inorganic filler and 0.5 to 10 parts by weight of a crosslinking agent per 100 parts by weight of low density polyethylene. Here, the crosslinking agent may be a silane coupling agent or a peroxide crosslinking agent, and may further include a crosslinking auxiliary agent.

The insulating layer may be formed of an ethylene-alpha olefin copolymer, a propylene-alpha olefin copolymer, an ethylene-vinyl acetate (EVA) copolymer, an ethylene-methyl acrylate (EMA) copolymer, an ethylene-propylene monomer (EPM) A rubber resin selected from the group consisting of propylene-diene resins and polyolefin elastomers (POE); Or a polar modified resin which is an ethylene-propylene-diene monomer or a polyolefin elastomer grafted with any one material selected from the group consisting of maleic anhydride, fatty acid, aminosilane and vinylsilane, or a mixture of two or more thereof; At least one auxiliary resin among the at least one auxiliary resin.

In the ship and marine cable according to an embodiment of the present invention, the inorganic filler includes at least one material selected from the group consisting of calcium carbonate, magnesium carbonate, calcium silicate, titanium white, talc, and mica. At this time, the inorganic filler may include 50 to 200 parts by weight based on 100 parts by weight of the low-density polyethylene, thereby improving mechanical properties and durability.

In this case, the inorganic filler may be one which is not coated or one which is coated with a hydrophobic substance selected from the group consisting of stearic acid, oleic acid, fatty acid, aminosilane and vinylsilane.

The silane coupling agent may be at least one selected from the group consisting of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, But are not limited to, trimethoxysilane, trimethoxysilane, propyltriethoxysilane, butyltrimethoxysilane, butyltriethoxysilane, pentyltrimethoxysilane, pentyltriethoxysilane, heptyltrimethoxysilane, heptyltriethoxysilane, Hexadecyltrimethoxysilane, hexadecyltrimethoxysilane, octadecyltrimethoxysilane, octadecyltriethoxysilane, hexadecyltrimethoxysilane, hexadecyltrimethoxysilane, hexadecyltrimethoxysilane, octadecyltrimethoxysilane, octadecyltrimethoxysilane, , Phenyltrimethoxysilane, phenyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane,? -Aminopropyltrimethoxysilane,? -Aminopropyltriethoxysilane,? -Glycidoxypropyl tri Methoxy Is selected from? -Glycidoxypropyltriethoxysilane,? -Methacryloxypropyltrimethoxysilane,? -Methacryloxypropyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane or vinylsiloxane oligomer , But is not limited thereto.

The silane coupling agent is preferably contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the low-density polyethylene. If the content is less than 0.5 parts by weight, the tensile strength may be lowered or the elongation percentage may be excessively increased. If the content is more than 10 parts by weight, the elongation percentage may be lowered.

The peroxide cross-linking agent is preferably contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the low-density polyethylene. If the content is less than 0.5 parts by weight, the tensile strength and heat resistance may deteriorate, or the insulation may be deformed due to a pressing phenomenon at a high temperature. If the content is more than 10 parts by weight, heat resistance and elongation may be deteriorated.

Here, preferred crosslinking agents include di- (2,4-dichlorobenzoyl) -peroxide, dibenzoyl peroxide, tertiary-butyl peroxybenzoate tert-butyl peroxybenzoate, 1,1-di- (tertiary-butylperoxy) -3,3,5-trimethylcyclohexane, trimethylcyclohexane, dicumyl peroxide, di- (2-tert-butyl-peroxyisopropyl) -benzene, tertiary- 2,5-dimethyl-2,5-di- (tert-butylperoxy) -hexane [2,5-dimethyl-2,5-di- (tert-butylperoxy) ) -hexane, Di-tert-butylperoxide and 2,5-dimethyl-2,5-di (tertiarybutylperoxy) -2,5-di (tert-butylperoxy) hexyme-3 may be used.

The crosslinking aid is preferably at least one selected from triaryl cyanurate or triaryl isocyanurate, but is not limited thereto. The crosslinking assistant is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the low-density polyethylene. When the content is less than 0.5 parts by weight, the tensile strength is lowered and the insulator can be deformed by pressing at a high temperature. When the content is more than 10 parts by weight, the elongation percentage is decreased.

In a ship and a marine cable according to an embodiment of the present invention, a primary sheath protects an internal conductor line assembly, and a polymer resin can be used. As the preferable polymer resin, polyvinyl chloride, polyvinyl Chloride-based mixture. In addition, the primary sheath may be provided as a binder layer, and a foamed polypropylene tape may be used.

In a ship and a marine cable according to an embodiment of the present invention, the secondary sheath surrounds the outer side of the braided layer and is not limited to a different application depending on the conditions such as the exposure environment and the working environment, A base resin containing an ethylene vinyl acetate copolymer, a non-halogen type flame retardant, and a cross-linking agent.

Wherein the base resin comprises 30 to 50% by weight of an ethylene vinyl acetate copolymer having an ethylene vinyl acetate copolymer and a vinyl acetate content of 5 to 33% by weight, 30 to 50% by weight of a linear low density polyethylene (LLDPE) resin and a polyolefin elastomer POE) in an amount of 10 to 30% by weight. In this case, the vinyl acetate copolymer is contained in the base resin in an amount of 30 to 50 wt%, which is preferable for improving the tackiness and mechanical properties. The linear low density polyethylene resin is preferably contained in the base resin in an amount of 30 to 50 wt% and the density (g / cm 3) in the range of 0.92 to 0.94 is preferable for improving the flexibility of the product. The polyolefin elastomer To 30% by weight and a density in the range of 0.5 to 30 is preferable for improving flexibility and heat resistance.

The non-halogen flame retardant is preferably used in an amount of 50 to 200 parts by weight based on 100 parts by weight of the base resin. Outside of the above range, flame retardancy may be deteriorated or mechanical properties may be deteriorated.

The non-halogen flame retardant may include at least one metal hydroxide selected from the group consisting of aluminum hydroxide, magnesium hydroxide, calcium hydroxide, hydrotalcite, Huntite and hydro-magneite, and the metal hydroxide may be surface- Can be used.

In addition, the metal hydroxide may be improved in mechanical properties and flame retardancy by using 40 to 150 parts by weight of the non-surface-treated metal hydroxide and 50 to 200 parts by weight of the metal hydroxide consisting of 10 to 50 parts by weight of the silane-treated metal hydroxide. Outside of the above range, the flame retardancy may deteriorate or the elongation percentage may decrease.

The crosslinking agent may be a silane coupling agent or a peroxide crosslinking agent, and is preferably used in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the base resin.

The silane coupling agent and the peroxide crosslinking agent may be materials used for the insulating layer, but are not limited thereto.

The secondary sheath may further include at least one flame-retardant auxiliary selected from a phosphorus-based flame retardant, a borate, a boric acid compound, a silicon-based compound or a molybdenum-based compound.

The composition in the cable according to the present invention may further include stabilizers, processing aids, antioxidants and ultraviolet stabilizers as additives, but is not limited thereto.

The stabilizer may be an organic metal salt including zinc, calcium, magnesium, or a mixture thereof or an organic acid metal salt. Zinc stearate may be used as the stabilizer. Examples of the stabilizer include a hydrocarbon-based material such as paraffin wax, a stearic acid, , And silicon-based materials can be used. As the antioxidant, a phenol antioxidant, a sulfur antioxidant or a phosphoric acid antioxidant may be used singly or in combination of two or more. The ultraviolet stabilizer may be at least one selected from a benzotriazole-based compound, a benzophenone-based compound, a HALS-based compound, a hydroxyaryl-1,3,5-triazine-based compound and a steric hindrance amine-based compound. The content of these additives is preferably 0.01 to 10 parts by weight based on 100 parts by weight of the base resin so as to meet the respective properties.

The ship and marine cable according to an embodiment of the present invention exhibits the same characteristics as general ships and marine cables using copper, but its weight is reduced by 20% or more, which is advantageous in terms of process and cost.

The ship and marine cable according to the present invention has high corrosion resistance against salt, brine has excellent flexibility and stiffness in various temperature ranges, excellent electric conduction property, stain resistance, heat resistance, oil resistance and flame retardancy, Which is economically advantageous.

1 is a perspective view of a ship and a marine cable according to the present invention.
2 is a sectional view of a ship and a marine cable according to the present invention.

Preferred embodiments of the ship and the marine cable according to the present invention are shown in Figs. 1 and 2. Fig. The cable includes a core wire conductor 10, an insulation layer 20 that can insulate the core wire conductor from the core wire conductor, a primary sheath 40 that surrounds the aggregate of the core wire conductor coated with the insulation layer and the filler 30 A braided layer 50 surrounding the primary sheath 40, and a secondary sheath 60 surrounding the braided layer.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited by the following Examples.

[evaluation]

1) Tensile strength and elongation

Tensile strength and elongation shall be measured in accordance with IEC 60811-1-1. The tensile strength shall be 0.92 kgf / ㎟ and the elongation shall exceed 120%.

2) Specific gravity: Electronic Densimeter (MFD by A & D, MD-200S)

According to KS M 0602, the weight and volume value are calculated by calculating the average value of the weight of the object in air and water vapor by the underwater substitution method.

[Production Example 1]

1) Conductor: CCA [CCA-15A 2.14mm, ASTM B566-4a (2011)]

2) Insulating layer: An insulating layer resin composition containing 100 parts by weight of an inorganic filler and 8 parts by weight of a silane coupling agent with respect to 100 parts by weight of low density polyethylene (CAS No. 9002-88-4) was used.

3) Filler: PP binder (FA ND 55,000D)

4) Primary sheath: PP FOAM TAPE (0.17 * 70)

5) Secondary sheath: 150 parts by weight of magnesium hydroxide not subjected to surface treatment with respect to 100 parts by weight of a base resin containing 65% by weight of an ethylene vinyl acetate copolymer having a vinyl acetate content of 18% by weight (EVA 1159, Hanwha Chemical Co., And a secondary sheath composition containing 8 parts by weight of a coupling agent was used.

[Examples and Comparative Examples]

Using the composition of Preparation Example 1, a cable as shown in Fig. 1 was prepared.

The core wire conductor 10, the insulating layer 20, three core wire conductors coated with an insulating layer, and the filler 30 are combined on the aggregate through an extrusion and cooling process using a T-die extruder The primary sheath 40, the braided layer 50, and the secondary sheath 60 were sequentially formed. Of these, the braided layers were made of metal wires or alloy wires having the compositions shown in Table 1 below, and Examples 1 to 4 and Comparative Examples 1 to 3 were subjected to the characteristic tests, and the results are shown in Table 2 below.

As shown in Table 2 below, tensile strength was measured from 19.52 (kgf / mm 2) to 22.52 (kgf / mm 2) in Examples 1 to 4 according to the present invention, and elongation was measured from 19.28% to 22.43% On the contrary, in Comparative Examples 1 to 3, the tensile strength is 16.15 (kgf / mm < 2 >) or less, and disconnection may occur in the braiding process. Accordingly, it has been confirmed that the ship and marine cables according to the present invention can exhibit excellent mechanical properties while reducing weight and cost.

[Table 1]

[Table 2]

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: core conductor 11: aluminum 12: copper
20: Insulation layer 30: Filler
40: primary sheath 50: braided layer 60: secondary sheath

Claims (12)

An insulation layer capable of insu- lating insulation of the core wire conductor, an aggregate formed by combining the core wire conductor and the filler coated with the insulation layer, a primary sheath surrounding the aggregate, a braid layer surrounding the primary sheath, And a second sheath surrounding the second sheath,
Wherein the braided layer is braided by copper coating an alloy wire containing 50 to 98.9% by weight, magnesium of 1 to 30% by weight and iron of 0.01 to 20% by weight.
delete The method according to claim 1,
Wherein said alloy wire further comprises at least one metal selected from silicon, chromium and manganese.
The method according to claim 1,
Wherein the braided layer has a thickness of 0.1 to 5% of the total diameter of the cable.
The method according to claim 1,
Wherein the core conductor is a copper clad aluminum having a copper content of 5 to 40% by weight.
The method according to claim 1,
Wherein the insulating layer comprises low density polyethylene, an inorganic filler and a crosslinking agent.
The method according to claim 6,
The insulating layer may be formed of an ethylene-alpha olefin copolymer, a propylene-alpha olefin copolymer, an ethylene-vinyl acetate (EVA) copolymer, an ethylene-methyl acrylate (EMA) copolymer, an ethylene-propylene monomer (EPM) A rubber resin selected from the group consisting of propylene-diene resins and polyolefin elastomers (POE); Or a polar modified resin which is an ethylene-propylene-diene monomer or a polyolefin elastomer grafted with any one material selected from the group consisting of maleic anhydride, fatty acid, aminosilane and vinylsilane, or a mixture of two or more thereof; And further comprising at least one auxiliary resin.
The method according to claim 6,
Wherein the inorganic filler comprises at least one material selected from the group consisting of calcium carbonate, magnesium carbonate, calcium silicate, titanium white, talc, mica.
9. The method of claim 8,
Wherein the inorganic filler is coated with a hydrophobic material selected from the group consisting of stearic acid, oleic acid, fatty acid, aminosilane and vinylsilane.
The method according to claim 1,
Wherein said secondary sheath comprises a base resin comprising an ethylene vinyl acetate copolymer, a non-halogen flame retardant, and a crosslinking agent.
11. The method of claim 10,
The non-halogen flame retardant includes at least one metal hydroxide selected from the group consisting of aluminum hydroxide, magnesium hydroxide, calcium hydroxide, hydrotalcite, hunting and hydro-magneite.
11. The method of claim 10,
Wherein the non-halogen flame retardant comprises 40 to 150 parts by weight of a metal hydroxide which has not been surface-treated with respect to 100 parts by weight of the base resin, and 10 to 50 parts by weight of a metal hydroxide surface-treated with silane.

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