CN105367859A - High-temperature-resistant and dampproof cable for industry - Google Patents

Abstract

The invention belongs to the technical field of cables, and discloses a high-temperature-resistant and moisture-proof industrial cable, which is prepared by wrapping a wire with an insulating outer layer, and is characterized in that the insulating outer layer is prepared from the following raw materials: graphite, silicon carbide , aluminum oxide, triphenyl phosphate, oleic acid amide, zinc borate, glass fiber, borax, palygorskite, stearic acid, aluminum nitride, egg shell, triallyl cyanurate, polypropylene resin, three EPDM, PVC, HNBR. The cable of the present invention has better high temperature resistance, moisture resistance and waterproof performance and mechanical performance.

Description

A high temperature resistant and moisture proof industrial cable

technical field

The invention belongs to the technical field of cables, in particular to a high-temperature-resistant and moisture-proof industrial cable.

Background technique

The high temperature and moisture resistance of the cable is particularly important, which is the guarantee for the normal transportation of electricity. Most of the existing fire-resistant and high-temperature-resistant cables are made of magnesium oxide cables. Although this cable has high fire resistance, its softness is particularly poor. The insulation inside is filled with magnesium oxide, and copper tubes are used as the sheath outside. Its characteristics are: The weight is heavy, the bending performance is poor, and it cannot be manufactured in a large length, which causes great inconvenience to production and use. Even if the current ordinary flexible fireproof cable is used, it also has a great disadvantage. The fireproof layer is wrapped with mica tape. If the outer copper sheath is damaged, moisture will invade. Once the mica absorbs moisture, it will fail and will It loses its insulating properties and does not have the function of fire resistance. Another point is that mica is a very brittle material that is easily broken, and it will fail after being broken, that is, it does not have a fireproof function, and its weight is also large, its outer diameter is also large, and its flexibility is poor. It is particularly important to develop a high-temperature-resistant and moisture-proof industrial cable.

Contents of the invention

The purpose of the present invention is to solve many defects of cables in the prior art. After a lot of tests and explorations, the existing raw material composition and preparation method are changed to provide a high temperature resistant and moisture-proof industrial cable. The insulating outer layer of the cable has better Excellent high temperature resistance, moisture resistance, waterproof performance, corrosion resistance, flame retardancy and mechanical properties; the preparation process of the above-mentioned cables is simple and suitable for large-scale industrial production.

In order to achieve the above object, the technical solution of the present invention is achieved in the following manner:

A high-temperature and moisture-proof industrial cable, which is prepared by wrapping a wire with an insulating outer layer,

The insulating outer layer is prepared from the following raw materials:

Graphite, silicon carbide, aluminum oxide, triphenyl phosphate, oleamide, zinc borate, glass fiber, borax, palygorskite, stearic acid, aluminum nitride, egg shell, triallyl cyanurate, poly Acrylic resin, EPDM rubber, polyvinyl chloride, hydrogenated nitrile rubber.

Specifically, it is prepared from the following raw materials in parts by weight:

1-2 parts of graphite, 1-2 parts of silicon carbide, 1-2 parts of aluminum oxide, 2-3 parts of triphenyl phosphate, 2-3 parts of oleic acid amide, 2-3 parts of zinc borate, 3-4 parts of glass fiber , 3-4 parts of borax, 3-4 parts of palygorskite, 3-4 parts of stearic acid, 4-5 parts of aluminum nitride, 5-7 parts of egg shell, 6-8 parts of triallyl cyanurate , 10-12 parts of polypropylene resin, 20-25 parts of EPDM rubber, 30-40 parts of polyvinyl chloride, 40-50 parts of hydrogenated nitrile rubber.

Preferably, the particle size of graphite, silicon carbide, aluminum oxide, zinc borate and aluminum nitride is all controlled at 100 mesh; the diameter of glass fiber is 10-20um, and the length is 30-50um.

The preparation method of the above-mentioned insulating outer layer comprises the following steps:

Step 1) Preparation of material 1: Add borax, palygorskite and egg shells to the crusher in sequence for crushing, and then grind to obtain a powder with a particle size of 100 mesh, which is material 1;

Step 2) Preparation of material 2: Put oleic acid amide, glass fiber, stearic acid and aluminum nitride into the stirred reactor, stir at 200 rpm for 10 minutes, then heat to 70°C, keep it warm for 3 minutes, and finally drop to 30°C , get material 2;

Step 3) Preparation of material 3: Mix triphenyl phosphate, triallyl cyanurate, polypropylene resin, EPDM rubber, polyvinyl chloride and hydrogenated nitrile rubber evenly, add to an internal mixer, and The refining time is 5 minutes, the banburying temperature is 90°C, and the material 3 is obtained;

Step 4) Prepare the insulating outer layer: put graphite, silicon carbide, alumina, zinc borate, material 1, material 2 and material 3 into the centrifuge in turn, and centrifuge at 1200 rpm for 3 minutes. After mixing evenly, enter the double The screw extruder is extruded into a molten state, and after the mixture is completely melted, it is extruded into an injection molding machine, and injection molding is obtained.

The wires can be aluminum alloys, aluminum copper alloys and other common wires.

The beneficial effects that the present invention obtains mainly comprise:

Oleic acid amide can reduce the friction between the internal friction film and the transmission equipment during the processing of resins, etc., simplify the operation of the final product, reduce the melt viscosity of resin pellets, and improve fluidity. Triallyl cyanurate can significantly improve the strength, rigidity and heat resistance of the product, allowing the product to be used for a long time at around 250°C. EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, which has excellent ozone resistance, heat resistance, weather resistance, aging resistance, waterproof and moisture resistance. Hydrogenated nitrile rubber has good heat resistance, excellent chemical corrosion resistance (good resistance to freon, acid, and alkali), excellent ozone resistance, and high compression set resistance. The advantages of glass fiber are good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Egg shells belong to domestic wastes, and the invention effectively utilizes them, has low raw materials, improves mechanical properties, turns waste into wealth, and kills two birds with one stone. Graphite has good high temperature resistance, thermoplasticity resistance and lubricating effect. Aluminum nitride is a good heat-shock-resistant material, which has good stability, high strength, good thermal conductivity, and small thermal expansion coefficient, but its compatibility with the rubber matrix is poor. The present invention modifies it so that aluminum nitride The surface of the cable is improved, its agglomeration tendency is weakened, the compatibility between it and the rubber matrix is enhanced, and the mechanical properties, heat aging resistance and wear resistance of the insulating material are improved; the cable prepared by the present invention has insulation performance, resistance Corrosion properties, flame retardant properties and mechanical properties.

detailed description

In order to enable those skilled in the art to better understand the technical solutions in the application, the following will describe the present invention more clearly and completely in conjunction with the specific embodiments of the application. Obviously, the described embodiments are only part of the implementation of the application. example, not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

A high-temperature and moisture-proof industrial cable, which is prepared by wrapping an aluminum alloy wire with an insulating outer layer,

The insulating outer layer is prepared from the following raw materials in parts by weight:

1 part of graphite, 1 part of silicon carbide, 1 part of alumina, 2 parts of triphenyl phosphate, 2 parts of oleic acid amide, 2 parts of zinc borate, 3 parts of glass fiber, 3 parts of borax, 3 parts of palygorskite, stearic acid 3 parts, 4 parts of aluminum nitride, 5 parts of egg shell, 6 parts of triallyl cyanurate, 10 parts of polypropylene resin, 20 parts of EPDM rubber, 30 parts of polyvinyl chloride, 40 parts of hydrogenated nitrile rubber share.

Among them, the particle size of graphite, silicon carbide, alumina, zinc borate and aluminum nitride is controlled at 100 mesh; the diameter of glass fiber is 10um, and the length is 30um.

The preparation method of the above-mentioned insulating outer layer comprises the following steps:

Step 1) Preparation of material 1: Add borax, palygorskite and egg shells to the crusher in sequence for crushing, and then grind to obtain a powder with a particle size of 100 mesh, which is material 1;

Step 2) Preparation of material 2: Put oleic acid amide, glass fiber, stearic acid and aluminum nitride into the stirred reactor, stir at 200 rpm for 10 minutes, then heat to 70°C, keep it warm for 3 minutes, and finally drop to 30°C , get material 2;

Step 3) Preparation of material 3: Mix triphenyl phosphate, triallyl cyanurate, polypropylene resin, EPDM rubber, polyvinyl chloride and hydrogenated nitrile rubber evenly, add to an internal mixer, and The refining time is 5 minutes, the banburying temperature is 90°C, and the material 3 is obtained;

Step 4) Prepare the insulating outer layer: put graphite, silicon carbide, alumina, zinc borate, material 1, material 2 and material 3 into the centrifuge in turn, and centrifuge at 1200 rpm for 3 minutes. After mixing evenly, enter the double The screw extruder is extruded into a molten state, and after the mixture is completely melted, it is extruded into an injection molding machine, and injection molding is obtained.

Example 2

A high-temperature-resistant and moisture-proof industrial cable is prepared by wrapping a copper-aluminum alloy wire with an insulating outer layer, and the insulating outer layer is prepared from the following raw materials in parts by weight:

2 parts of graphite, 2 parts of silicon carbide, 2 parts of alumina, 3 parts of triphenyl phosphate, 3 parts of oleic acid amide, 3 parts of zinc borate, 4 parts of glass fiber, 4 parts of borax, 4 parts of palygorskite, stearic acid 4 parts, aluminum nitride 5 parts, egg shell 7 parts, triallyl cyanurate 8 parts, polypropylene resin 12 parts, EPDM rubber 25 parts, polyvinyl chloride 40 parts, hydrogenated nitrile rubber 50 parts share.

Among them, the particle size of graphite, silicon carbide, alumina, zinc borate and aluminum nitride is controlled at 100 mesh; the diameter of glass fiber is 20um, and the length is 50um.

The preparation method of the above-mentioned insulating outer layer comprises the following steps:

Step 1) Preparation of material 1: Add borax, palygorskite and egg shells to the crusher in sequence for crushing, and then grind to obtain a powder with a particle size of 100 mesh, which is material 1;

Step 2) Preparation of material 2: Put oleic acid amide, glass fiber, stearic acid and aluminum nitride into the stirred reactor, stir at 200 rpm for 10 minutes, then heat to 70°C, keep it warm for 3 minutes, and finally drop to 30°C , get material 2;

Step 3) Preparation of material 3: Mix triphenyl phosphate, triallyl cyanurate, polypropylene resin, EPDM rubber, polyvinyl chloride and hydrogenated nitrile rubber evenly, add to an internal mixer, and The refining time is 5 minutes, the banburying temperature is 90°C, and the material 3 is obtained;

Step 4) Prepare the insulating outer layer: put graphite, silicon carbide, alumina, zinc borate, material 1, material 2 and material 3 into the centrifuge in turn, and centrifuge at 1200 rpm for 3 minutes. After mixing evenly, enter the double The screw extruder is extruded into a molten state, and after the mixture is completely melted, it is extruded into an injection molding machine, and injection molding is obtained.

Example 3

The performance test of the cable prepared by the present invention:

1. The insulating outer layer prepared in Example 1 and Example 2 has better high-temperature, waterproof, and moisture-proof properties, mechanical properties and flame-retardant properties. The specific test results can be seen in Table 1, wherein the thickness of the insulating outer layer is 2mm:

Table 1

group Tensile strength (N/mm ² ) Elongation at break (%) Thermal stability time at 200°C (min) Volume resistivity×10 ^-15 (Ω·cm) Oxygen Index Example 1 18.3 483 >200 2.31 34.1 Example 2 18.6 491 >200 2.37 34.3

2. Moisture-proof and moisture-proof performance test: put the test material under the condition of 100% humidity and 60°C for 200 days, and measure the main performance parameters, see Table 2:

Table 2

group Volume resistivity retention (%) Tensile Strength Retention Rate (%) Elongation at break (%) Example 1 99.3 99.1 99.1 Example 2 99.5 99.3 99.2

The present invention has been described above in conjunction with specific embodiments, but those skilled in the art should be clear that these descriptions are all exemplary and not limiting the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.

Claims (4)

1. the industrial cable of high temperature resistant protection against the tide, it wraps up conductive line fabrication by insulating outer layer and forms, and it is characterized in that, described insulating outer layer is prepared from by following raw material:

Graphite, silicon carbide, aluminum oxide, triphenylphosphate, amine hydroxybenzene, zinc borate, glass fibre, borax, polygorskite, stearic acid, aluminium nitride, Ovum crusta Gallus domesticus, triallyl cyanurate, acrylic resin, terpolymer EP rubber, polyvinyl chloride, hydrogenated nitrile-butadiene rubber.

2. cable according to claim 1, is characterized in that, described insulating outer layer is prepared from by the raw material of following weight part:

Graphite 1-2 part, silicon carbide 1-2 part, aluminum oxide 1-2 part, triphenylphosphate 2-3 part, amine hydroxybenzene 2-3 part, zinc borate 2-3 part, glass fibre 3-4 part, borax 3-4 part, polygorskite 3-4 part, stearic acid 3-4 part, aluminium nitride 4-5 part, Ovum crusta Gallus domesticus 5-7 part, triallyl cyanurate 6-8 part, acrylic resin 10-12 part, terpolymer EP rubber 20-25 part, polyvinyl chloride 30-40 part, hydrogenated nitrile-butadiene rubber 40-50 part.

3. cable according to claim 2, is characterized in that, preferably, described graphite, silicon carbide, aluminum oxide, the particle diameter of zinc borate and aluminium nitride is 100 orders; The diameter of described glass fibre is 10-20um, and length is 30-50um.

4. the cable according to Claims 2 or 3, is characterized in that, the preparation method of described insulating outer layer comprises the steps:

Step 1) prepares material 1: borax, polygorskite and Ovum crusta Gallus domesticus are added to successively in crusher and carry out fragmentation, then grind, and obtaining particle diameter is 100 object powder, is material 1;

Step 2) prepare material 2: put in stirred reactor by amine hydroxybenzene, glass fibre, stearic acid and aluminium nitride, 200 turns/min stirs 10min, is then heated to 70 DEG C, and insulation 3min, is finally down to 30 DEG C, obtains material 2;

Step 3) prepares material 3: by triphenylphosphate, triallyl cyanurate, acrylic resin, terpolymer EP rubber, polyvinyl chloride and hydrogenated nitrile-butadiene rubber, mix, and adds Banbury mixer, the banburying time is 5 minutes, and banburying temperature is 90 DEG C, obtains material 3;

Step 4) prepares insulating outer layer: by graphite, silicon carbide, aluminum oxide, zinc borate, material 1, material 2 and material 3 are put in whizzer successively, 1200 turns/min centrifugal mixer 3 minutes, after mixing, enters twin screw extruder and is squeezed into molten state, be expressed in injection moulding machine after the complete melting of batch mixing, injection moulding and get final product.