CN-122000123-A - Aging-resistant cable and preparation method thereof

Abstract

The invention relates to the technical field of cables, and provides an anti-aging cable and a preparation method thereof. The aging-resistant cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, wherein the sheath layer comprises the following raw materials, by weight, 40-50 parts of high-density polyethylene A, 35-45 parts of high-density polyethylene B, 20-25 parts of high-density polyethylene C, 15-20 parts of filler and 2-3 parts of auxiliary agent, and the additive types of the high-density polyethylene A, the high-density polyethylene B and the high-density polyethylene C are different. Through the technical scheme, the problem of insufficient ageing resistance of the cable in the related technology is solved.

Inventors

• LI JIZHU
• QIAN HANJIE
• LI YANJUN

Assignees

• 沧州会友线缆股份有限公司

Dates

Publication Date

20260508

Application Date

20260210

Claims (10)

1. 1. The aging-resistant cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and is characterized in that the sheath layer comprises, by weight, 40-50 parts of high-density polyethylene A, 35-45 parts of high-density polyethylene B, 20-25 parts of high-density polyethylene C, 15-20 parts of a filler and 2-3 parts of an auxiliary agent, wherein the types of additives of the high-density polyethylene A, the high-density polyethylene B and the high-density polyethylene C are different.
2. 2. An aging resistant cable according to claim 1, wherein the conductor is copper.
3. 3. An aging resistant cable according to claim 1, wherein the insulation layer is a crosslinked polyethylene insulation layer.
4. 4. An aging resistant cable according to claim 1, wherein the additive of the high density polyethylene a is carbon black, the additive of the high density polyethylene B is an anti UV agent, and the additive of the high density polyethylene C is an antioxidant.
5. 5. An anti-ageing cable according to claim 1, wherein the filler comprises one or more of talc, carbon black, calcium carbonate.
6. 6. The aging-resistant cable according to claim 5, wherein the filler consists of carbon black and talcum powder in a mass ratio of 1-2:4.
7. 7. An aging resistant cable according to claim 6, wherein the filler is a composite filler, and the method of preparing the composite filler comprises the steps of: A1, dispersing an anilino silane compound in a solvent, adding carbon black, mixing, concentrating, and drying to obtain composite carbon black; a2, dispersing an aluminate coupling agent in a solvent, adding talcum powder, mixing, concentrating and drying to obtain composite talcum powder; A3, mixing the composite carbon black and the composite talcum powder to obtain the composite filler.
8. 8. An aging resistant cable according to claim 7, wherein said anilino silane compound comprises one or both of aminomethyl dimethoxy silane and methyl triethoxy silane.
9. 9. The aging-resistant cable according to claim 1, wherein the auxiliary agent comprises an antioxidant, a lubricant and an ultraviolet absorber in a mass ratio of 2-3:1.5:1.
10. 10. A method for preparing the aging-resistant cable, which is used for preparing the aging-resistant cable according to any one of claims 1 to 9, and is characterized by comprising the following steps: s1, extruding an insulating layer outside the conductor to obtain a semi-finished product; S2, uniformly mixing the raw materials of the sheath layer, and extruding and wrapping the semi-finished product to obtain the aging-resistant cable.

Description

Aging-resistant cable and preparation method thereof Technical Field The invention relates to the technical field of cables, in particular to an anti-aging cable and a preparation method thereof. Background The cable is used as a core carrier for electric energy transmission and signal transmission, is widely applied to the key fields of national economy such as power systems, communication networks, rail transit, constructional engineering, new energy equipment and the like, and the operation stability of the cable is directly related to the safe and reliable operation of related equipment and systems. In the selection of the cable sheath layer material, the high-density polyethylene has the advantages of excellent mechanical strength, insulating property and good processing formability, and meanwhile, the cost is relatively low, so that the high-density polyethylene becomes one of the main stream materials of the current cable sheath layer. However, the high-density polyethylene molecular chain lacks anti-aging functional groups, is easy to be irradiated by ultraviolet rays in sunlight, alternate between cold and hot at ambient temperature and oxidized and corroded by oxygen in the long-term service process, and causes degradation and crosslinking reaction of the molecular chain, and particularly shows the phenomena of pulverization, cracking, embrittlement and the like on the surface of the sheath. If the ageing resistance of the cable sheath layer is insufficient, the protective barrier of the cable is directly damaged, external water vapor and corrosive media are extremely easy to invade the inside of the cable, so that the performance of the insulating layer is deteriorated, faults such as electric leakage and short circuit are caused, and even power interruption and signal transmission failure can be caused when the faults are serious, so that the service life of the cable is greatly shortened, the operation and maintenance cost is increased, and safety accidents such as fire disaster and electric shock can be possibly caused, and serious threatens are formed on industrial production, civil electricity and public safety. Therefore, it is necessary to develop an aging-resistant cable. Disclosure of Invention The invention provides an aging-resistant cable and a preparation method thereof, which solve the problem of insufficient aging resistance of the cable in the related technology. The technical scheme is that the anti-aging cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, wherein the sheath layer comprises, by weight, 40-50 parts of high-density polyethylene A, 35-45 parts of high-density polyethylene B, 20-25 parts of high-density polyethylene C, 15-20 parts of fillers and 2-3 parts of additives, and the types of additives of the high-density polyethylene A, the high-density polyethylene B and the high-density polyethylene C are different. As a further technical scheme, the conductor is made of copper. As a further technical scheme, the insulating layer is a crosslinked polyethylene insulating layer. As a further technical scheme, the additive of the high-density polyethylene A is carbon black, the additive of the high-density polyethylene B is an anti-UV agent, and the additive of the high-density polyethylene C is an antioxidant. The additive of the high-density polyethylene A is carbon black, the carbon black can efficiently reflect and scatter ultraviolet rays to prevent ultraviolet rays from penetrating the inside of the sheath layer to cause molecular chain free radical fracture, the additive of the high-density polyethylene B is an anti-UV agent to capture ultraviolet energy and convert the ultraviolet energy into harmless heat energy to release, the anti-UV agent and the carbon black in the high-density polyethylene A form a physical and chemical dual protective effect to prevent ultraviolet rays from damaging the sheath material, the additive of the high-density polyethylene C is an antioxidant to capture active free radicals generated in the thermal oxidation aging process of the sheath material to terminate the automatic oxidation cycle of molecular chains, and the aging of the sheath material in a high-temperature environment is effectively inhibited. The three are synergistic and complementary in advantages, so that the full coverage of light, heat and oxygen induced aging is realized, and the aging resistance of the cable is improved. As a further technical scheme, the filler comprises one or more of talcum powder, carbon black and calcium carbonate. As a further technical scheme, the filler consists of carbon black and talcum powder in a mass ratio of 1-2:4. As a further technical scheme, the filler is a composite filler, and the preparation method of the composite filler comprises the following steps: A1, dispersing an anilino silane compound in a solvent, adding carbon black, mixing, concentrating, and dryi