High-temperature-resistant aluminum alloy cable

Abstract

The invention relates to the technical field of aluminum alloy cables, and provides a high-temperature-resistant aluminum alloy cable which sequentially comprises a conductor, an insulating layer, a high-temperature-resistant layer, an armor layer and a sheath layer from inside to outside, and the high-temperature-resistant layer is prepared from, by weight, 20-30 parts of graphite, 10-20 parts of M5 fiber, 60-70 parts of polyethylene and 10-15 parts of ethylene-vinyl acetate copolymer. 2-5 parts of a polyolefin thermoplastic elastomer, 1-3 parts of a compatilizer and 1-3 parts of an antioxidant. According to the technical scheme, the problem of poor high temperature resistance of the aluminum alloy cable in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy cables, and in particular to a high temperature resistant aluminum alloy cable. Background Art

[0002] Cables are a vital electrical product in modern society. They mainly use conductor materials such as metals and aluminum alloys to achieve power transmission, signal transmission, and electromagnetic conversion. The outer layer of the conductor material is usually wrapped with an insulating layer and a protective layer to ensure that the conductor current is transmitted safely and effectively and to prevent the signal from being interfered with, thereby ensuring the normal operation of the cable and extending the service life of the cable. However, the high temperature resistance of the current aluminum alloy cable during use is not ideal. Therefore, an aluminum alloy cable with good high temperature resistance is urgently needed. Summary of the invention

[0003] The present invention provides a high temperature resistant aluminum alloy cable, which solves the problem of poor high temperature resistance of the aluminum alloy cable in the related art.

[0004] The technical solution of the present invention is as follows: The present invention provides a high-temperature resistant aluminum alloy cable, which comprises a conductor, an insulating layer, a high-temperature resistant layer, an armor layer and a sheath layer in order from the inside to the outside. The raw materials of the high-temperature resistant layer include the following components in parts by weight: 20 to 30 parts of graphite, 10 to 20 parts of M5 fiber, 60 to 70 parts of polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 2 to 5 parts of polyolefin thermoplastic elastomer, 1 to 3 parts of compatibilizer, and 1 to 3 parts of antioxidant.

[0005] As a further technical solution, the mass ratio of the graphite to the M5 fiber is 5:3.

[0006] The present invention further improves the high temperature resistance of the high temperature resistant aluminum alloy cable by limiting the mass ratio of graphite to M5 fiber to 5:3.

[0007] As a further technical solution, the graphite is modifier-modified graphite, the modifier includes a first modifier and / or a second modifier, the first modifier is 1,4-phenylene diisocyanate, and the second modifier is 4-(2-oxiranylmethoxy)-phenylethanol.

[0008] The invention further improves the high temperature resistance of the high temperature resistant aluminum alloy cable by limiting the graphite to 1,4-phenylenediisocyanate and / or 4-(2-oxiranylmethoxy)-phenylethanol modified graphite.

[0009] As a further technical solution, the modifier in the modifier-modified graphite includes a first modifier and a second modifier in a mass ratio of 1:3 to 3:1.

[0010] The present invention further improves the high temperature resistance of the high temperature resistant aluminum alloy cable by using the first modifier and the second modifier in a mass ratio of 1:3 to 3:1.

[0011] As a further technical solution, the mass ratio of the first modifier to the second modifier is 3:5~5:3.

[0012] The present invention further improves the high temperature resistance of the high temperature resistant aluminum alloy cable by limiting the mass ratio of the first modifier to the second modifier to 3:5-5:3.

[0013] As a further technical solution, the compatibilizer includes one or more of PP-g-MAH, PP-g-BA, and PP-g-DBM.

[0014] As a further technical solution, the particle size of the graphite is 1 μm.

[0015] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 1035, antioxidant 2246, and antioxidant 1024.

[0016] As a further technical solution, the polyolefin thermoplastic elastomer includes one or more of TPO, TPV, and POE.

[0017] As a further technical solution, the raw material of the modifier-modified graphite includes the modifier and graphite in a mass ratio of 1 to 5:50.

[0018] As a further technical solution, the preparation method of the modifier-modified graphite comprises the following steps: After the first modifier is dissolved in a solvent, graphite is added and mixed evenly, and then the second modifier is added and mixed evenly, filtered, and dried to obtain modifier-modified graphite.

[0019] The working principle and beneficial effects of the present invention are: In the present invention, graphite and M5 fiber are selected and combined with polyethylene, ethylene-vinyl acetate copolymer, polyolefin thermoplastic elastomer, compatibilizer, antioxidant and other components to prepare a high-temperature resistant layer of a high-temperature resistant aluminum alloy cable. By compounding graphite and M5 fiber, the two synergistically improve the high-temperature resistance of the high-temperature resistant layer, thereby improving the high-temperature resistance of the aluminum alloy cable, and solving the problem of poor high-temperature resistance of the aluminum alloy cable in the prior art. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] A high temperature resistant aluminum alloy cable comprises, from the inside to the outside, a conductor, an insulating layer, a high temperature resistant layer, an armor layer and a sheath layer, wherein the high temperature resistant layer is prepared by the following method: In the following examples and comparative examples, the types of raw materials are as follows: Polyethylene is LDPE Lanzhou Petrochemical 2420H; Ethylene-vinyl acetate copolymer is EVA14-2 from Yanshan Petrochemical; TPO is TPO-8150; PP-g-MAH is maleic anhydride grafted polypropylene ZJ-900P; The particle size of graphite is 1 μm.

[0022] Example 1 20 parts of graphite, 20 parts of M5 fiber, 60 parts of polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 2 parts of TPO, 1 part of PP-g-MAH and 1 part of antioxidant 1010 were mixed evenly and melt-extruded outside the insulation layer to obtain the high temperature resistant layer of the aluminum alloy cable.

[0023] Example 2 30 parts of graphite, 10 parts of M5 fiber, 70 parts of polyethylene, 15 parts of ethylene-vinyl acetate copolymer, 5 parts of TPO, 3 parts of PP-g-MAH and 3 parts of antioxidant 1035 were mixed evenly and melt-extruded outside the insulation layer to obtain the high temperature resistant layer of the aluminum alloy cable.

[0024] Example 3 The only difference from Example 1 is: 30 parts of graphite and 10 parts of M5 fiber.

[0025] Example 4 The only difference from Example 1 is that: 25 parts of graphite and 15 parts of M5 fiber.

[0026] Example 5 S1. Dissolve 4 parts of 1,4-phenylene diisocyanate in 100 parts of THF, add 50 parts of graphite, mix well, filter, and dry to obtain modifier-modified graphite; S2. Mix 25 parts of modifier-modified graphite, 15 parts of M5 fiber, 60 parts of polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 2 parts of TPO, 1 part of PP-g-MAH and 1 part of antioxidant 1010, and melt-extrude them outside the insulation layer to obtain a high temperature resistant layer of the aluminum alloy cable.

[0027] Example 6 The only difference from Example 5 is that 1,4-phenylenediisocyanate is replaced by an equal amount of 4-(2-oxiranylmethoxy)-phenylethanol.

[0028] Example 7 S1. Dissolve 1 part of 1,4-phenylenediisocyanate in 100 parts of THF, add 50 parts of graphite and mix evenly, then add 3 parts of 4-(2-oxiranylmethoxy)-phenylethanol and mix evenly, filter, and dry to obtain modifier-modified graphite; S2. Mix 25 parts of modifier-modified graphite, 15 parts of M5 fiber, 60 parts of polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 2 parts of TPO, 1 part of PP-g-MAH and 1 part of antioxidant 1010, and melt-extrude them outside the insulation layer to obtain a high temperature resistant layer of the aluminum alloy cable.

[0029] Example 8 The only difference from Example 7 is that: 3 parts of 1,4-phenylenediisocyanate and 1 part of 4-(2-oxiranylmethoxy)-phenylethanol.

[0030] Example 9 The only difference from Example 7 is that: 1.5 parts of 1,4-phenylene diisocyanate and 2.5 parts of 4-(2-oxiranylmethoxy)-phenylethanol.

[0031] Example 10 The only difference from Example 7 is that: 2.5 parts of 1,4-phenylenediisocyanate and 1.5 parts of 4-(2-oxiranylmethoxy)-phenylethanol.

[0032] Comparative Example 1 40 parts of graphite, 60 parts of polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 2 parts of TPO, 1 part of PP-g-MAH and 1 part of antioxidant 1010 were mixed evenly and melt-extruded outside the insulation layer to obtain a high temperature resistant layer of the aluminum alloy cable.

[0033] Test example The samples to be tested were prepared according to the raw materials and production process of the high temperature resistant layer of Examples 1 to 10 and Comparative Example 1, respectively, and cut into dumbbell specimens. The tensile properties were tested before and after high temperature treatment according to the method in GB / T 2951.11-2008. The high temperature treatment was: 80°C for 30 days, and the change rate of tensile strength was calculated according to the following formula: Tensile strength change rate (%) = (tensile strength before treatment - tensile strength after treatment) ÷ tensile strength before treatment × 100; The results are shown in Table 1.

[0034] Table 1 Tensile performance test results of aluminum alloy cables prepared in Examples 1 to 10 and Comparative Example 1

[0035] Compared with Comparative Example 1, the aluminum alloy cables prepared in Example 1 and Examples 3-4 are a compound of graphite and M5 fibers. As a result, the tensile strength of Example 1 and Examples 3-4 is higher than that of Comparative Example 1, and the change rate of tensile strength of Example 1 and Examples 3-4 is lower than that of Comparative Example 1, indicating that the compound use of graphite and M5 fibers synergistically improves the high temperature resistance of the aluminum alloy cable.

[0036] Compared with Example 1 and Example 3, the mass ratio of graphite to M5 fiber in the aluminum alloy cable prepared in Example 4 is 5:3. As a result, the tensile strength of Example 4 is higher than those of Example 1 and Example 3, and the tensile strength change rate of Example 4 is lower than those of Example 1 and Example 3, indicating that the mass ratio of graphite to M5 fiber is 5:3, which further improves the high temperature resistance of the aluminum alloy cable.

[0037] Compared with Example 4, the graphite in the aluminum alloy cables prepared in Examples 5 to 10 is 1,4-phenylene diisocyanate and / or 4-(2-oxiranylmethoxy)-phenylethanol modified graphite. As a result, the tensile strength of Examples 5 to 10 is higher than that of Example 4, and the change rate of tensile strength of Examples 5 to 10 is lower than that of Example 4, indicating that the graphite is 1,4-phenylene diisocyanate and / or 4-(2-oxiranylmethoxy)-phenylethanol modified graphite, which further improves the high temperature resistance of the aluminum alloy cable.

[0038] Compared with Examples 5-6, the modifier-modified graphite in the aluminum alloy cables prepared in Examples 7-10 is a compound of the first modifier and the second modifier. As a result, the tensile strength of Examples 7-10 is higher than that of Examples 5-6, and the change rate of tensile strength of Examples 7-10 is lower than that of Examples 5-6, indicating that the high temperature resistance of the aluminum alloy cable is further improved by the compound use of the first modifier and the second modifier.

[0039] Compared with Examples 7 to 8, the mass ratio of the first modifier to the second modifier in the modifier-modified graphite in the aluminum alloy cables prepared in Examples 9 to 10 is 3:5 to 3:5. As a result, the tensile strength of Examples 9 to 10 is higher than that of Examples 7 to 8, and the change rate of tensile strength of Examples 9 to 10 is lower than that of Examples 7 to 8, indicating that the mass ratio of the first modifier to the second modifier is 3:5 to 3:5, which further improves the high temperature resistance of the aluminum alloy cable.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant aluminum alloy cable, comprising a conductor, an insulating layer, a high temperature resistant layer, an armor layer and a sheath layer from the inside to the outside, characterized in that: The raw materials of the high temperature resistant layer include the following components in parts by weight: 20-30 parts of graphite, 10-20 parts of M5 fiber, 60-70 parts of polyethylene, 10-15 parts of ethylene-vinyl acetate copolymer, 2-5 parts of polyolefin thermoplastic elastomer, 1-3 parts of compatibilizer, and 1-3 parts of antioxidant.

2. A high temperature resistant aluminum alloy cable according to claim 1, characterized in that: The mass ratio of the graphite to the M5 fiber is 5:

3.

3. A high temperature resistant aluminum alloy cable according to claim 1, characterized in that: The graphite is modifier-modified graphite, the modifier includes a first modifier and / or a second modifier, the first modifier is 1,4-phenylene diisocyanate, and the second modifier is 4-(2-oxiranylmethoxy)-phenylethanol.

4. A high temperature resistant aluminum alloy cable according to claim 3, characterized in that: The modifier in the modifier-modified graphite includes a first modifier and a second modifier in a mass ratio of 1:3 to 3:

1.

5. A high temperature resistant aluminum alloy cable according to claim 4, characterized in that: The mass ratio of the first modifier to the second modifier is 3:5 to 5:

3.

6. A high temperature resistant aluminum alloy cable according to claim 1, characterized in that: The compatibilizer includes one or more of PP-g-MAH, PP-g-BA, and PP-g-DBM.

7. The high temperature resistant aluminum alloy cable according to claim 1, characterized in that: The particle size of the graphite is 1 μm.

8. The high temperature resistant aluminum alloy cable according to claim 1, characterized in that: The antioxidant includes one or more of antioxidant 1010, antioxidant 1035, antioxidant 2246, and antioxidant 1024.

9. The high temperature resistant aluminum alloy cable according to claim 3, characterized in that: The raw materials of the modifier-modified graphite include the modifier and graphite in a mass ratio of 1 to 5:

50.

10. A high temperature resistant aluminum alloy cable according to any one of claims 4 to 5, characterized in that: The preparation method of the modifier-modified graphite comprises the following steps: After the first modifier is dissolved in a solvent, graphite is added and mixed evenly, and then the second modifier is added and mixed evenly, filtered, and dried to obtain modifier-modified graphite.

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