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CN-122025235-A - Cloth wire with wear-resistant and leakage-resistant functions and preparation process thereof

CN122025235ACN 122025235 ACN122025235 ACN 122025235ACN-122025235-A

Abstract

The invention belongs to the technical field of wire and cable high polymer material formulas and cable processes, and provides a cloth wire with anti-wear and anti-leakage functions and a preparation process thereof. The invention obtains functional master batch by mixing polymer matrix, wear-resistant filler and microencapsulated repairing agent, and then extruding and molding inner insulating layer material, functional master batch and outer insulating layer material on the outer surface of a wire in sequence to form an inner insulating layer, a functional layer and an outer insulating layer which are sequentially coated from inside to outside, and then carrying out irradiation crosslinking treatment to obtain the electric wire. The process improves the mechanical strength and the wear resistance of the electric wire by introducing the functional layer containing the microencapsulated repairing agent and the wear-resistant filler, reduces the occurrence of wear damage from the source, can automatically restore the insulation integrity, radically cuts off the leakage path, ensures that the prepared electric wire can take the dual functions of wear resistance and leakage resistance into account, and improves the long-term safety and reliability of the electric wire under the complex use environment.

Inventors

  • GUAN DEBIN
  • GUAN ZIWEI
  • MENG SUFANG

Assignees

  • 启源电气股份有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (8)

  1. 1. The preparation process of the electric distribution wire with the functions of wear resistance and electric leakage resistance is characterized by comprising the following steps of: 1) Preparing functional master batches, namely mixing a polymer matrix, wear-resistant filler and a microencapsulated repairing agent, and granulating to obtain the functional master batches; 2) Extrusion molding of multiple layers, namely sequentially extruding an inner insulating layer material, a functional master batch and an outer insulating layer material on the outer surface of a wire to form an inner insulating layer, a functional layer and an outer insulating layer which are sequentially coated from inside to outside; 3) Irradiation crosslinking treatment, namely irradiating the lead wire which is sequentially coated with the inner insulating layer, the functional layer and the outer insulating layer from inside to outside to obtain a cloth wire with the functions of wear resistance and electric leakage resistance; The polymer matrix in the step 1) comprises one or more of thermoplastic polyurethane, silicone rubber, ethylene-vinyl acetate copolymer and polyolefin elastomer; The wear-resistant filler comprises one or more of nano silicon dioxide, nano aluminum oxide and nano silicon carbide; The microcapsule core of the microcapsule repairing agent comprises one or more of silicone oil, liquid epoxy resin and dimethyl siloxane, and the microcapsule wall material of the microcapsule repairing agent comprises one or more of urea formaldehyde resin, melamine resin and gelatin-Arabic gum compound; The mass ratio of the polymer matrix to the wear-resistant filler to the microencapsulated repairing agent in the step 1) is 11-13:1-3:4-6; In the step 2), the thickness ratio of the inner insulating layer to the functional layer to the outer insulating layer is 1-2:1:2-3.
  2. 2. The process for preparing the electric wire with the anti-wear and anti-creeping functions according to claim 1, wherein in the step 1), the average particle size of the microencapsulated repairing agent is 10-30 μm, the content of the capsule core is 65-75%, and the thickness of the capsule wall is 150-250 nm.
  3. 3. The process for preparing the electric wire with the anti-wear and anti-creeping functions according to claim 2, wherein the granulating temperature in the step 1) is 140-160 ℃ and the rotating speed is 200-500 rpm.
  4. 4. The process for preparing the electric wire with the anti-wear and anti-leakage functions according to any one of claims 1 to 3, wherein the mesh number of the functional master batch in the step 1) is 20 to 40.
  5. 5. The process for preparing the electric wire with the anti-wear and anti-creeping functions according to claim 4, wherein in the step 2), the inner insulating layer material and the outer insulating layer material are independently low-smoke halogen-free flame-retardant polyolefin; the lead is a copper lead.
  6. 6. The process for manufacturing the electric wire with the anti-wear and anti-creeping functions according to claim 5, wherein the temperature for extrusion molding of the inner insulating layer material in the step 2) is 155-170 ℃; the extrusion molding temperature of the functional master batch is 140-160 ℃; the extrusion molding temperature of the outer insulating layer material is 160-175 ℃.
  7. 7. The process for preparing the electric wire with the anti-wear and anti-creeping functions according to claim 6, wherein the irradiation in the step 3) is electron beam irradiation; the dose of the electron beam irradiation is 50-150 kGy, and the time is 50-60 s.
  8. 8. The electric wire with the anti-wear and anti-leakage function prepared by the preparation process of the electric wire with the anti-wear and anti-leakage function according to any one of claims 1 to 7.

Description

Cloth wire with wear-resistant and leakage-resistant functions and preparation process thereof Technical Field The invention relates to the technical field of wire and cable high polymer material formulas and cable processes, in particular to a cloth wire with wear-resistant and leakage-resistant functions and a preparation process thereof. Background The electric wires (such as BV wires and BVR wires) are used as terminal core carriers for power transmission, and are widely used for fixed laying in buildings and structures, and the safety and durability of the electric wires directly determine the operation safety and long-term reliability of the electric system. However, in the long-term practical use process of the traditional electric distribution wire, the insulating layer has obvious defects in two key performances of wear resistance and electric leakage resistance, and becomes a potential safety hazard. In the aspect of wear resistance, the electric wires inevitably rub and scrape the surfaces of hard components such as walls, wire pipes, bridges and the like in the installation and laying process, and continuous micro mechanical friction can be generated due to environmental vibration, periodical extrusion caused by expansion and contraction or external force disturbance in the long-term service process. The insulating layer of the existing common electric wire is mostly made of conventional materials such as polyvinyl chloride (PVC), and the like, has limited wear resistance, and is easy to generate surface abrasion, scratch and even locally thin under the working conditions. The mechanical damage not only can directly weaken the physical barrier effect of the insulating layer, but also can provide a convenient channel for invasion of harmful substances such as moisture, conductive impurities and the like, thereby becoming an initial cause of gradual deterioration of the insulating performance and accelerating the aging failure of the electric distribution wires. In the aspect of electric leakage prevention, the mechanical damage of the insulating layer is realized, and micro cracks and pinholes generated in the long-term heat and oxygen aging process of the insulating material and possible inherent defects in the production and processing links are superimposed to form the weak link of the electric wire insulation system. Particularly in the severe environment with humidity, high temperature, multiple dust or corrosive gas, the tiny damage points are easy to develop into preferential conduction paths of leakage current, moisture permeation along microcracks can lead to the rapid decrease of the insulation resistance of the distribution wires, local electric field distortion can cause electrical dendrite phenomena, finally lead to breakdown of insulation layers and electrical short circuit, further induce serious safety accidents such as fire and the like, and seriously threaten the life and property safety of human beings. In view of the above problems, various improvements have been proposed in the prior art, but all have significant drawbacks. A common improvement mode is that mechanical protection structures such as metal or plastic sleeves and wire slots are additionally arranged outside the electric wire, the abrasion problem can be relieved to a certain extent, but the material cost and construction complexity are remarkably increased, meanwhile, the wiring flexibility is reduced, the existing damage generated by an insulating layer of the electric wire cannot be repaired, hidden danger is difficult to solve fundamentally, the thickness of the insulating layer is directly increased, the mechanical strength and the insulation margin are improved, but the external diameter of the electric wire is increased, the flexibility is poor, the material cost is increased, and the construction and cost control are also not facilitated. Therefore, it is needed to provide a distribution wire which can give consideration to the dual functions of wear resistance and leakage resistance and has both economical efficiency and construction convenience, so as to fundamentally improve the long-term safety and reliability of the distribution wire in a complex use environment. Disclosure of Invention In view of the above, the invention provides a cloth wire with wear-resistant and anti-creeping functions and a preparation process thereof, so as to solve the problems that an existing cloth wire insulating layer is easy to wear and damage, and is easy to cause electric leakage hidden trouble, and the existing cloth wire is high in preparation cost and inconvenient to construct. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a preparation process of a cloth wire with wear-resistant and anti-creeping functions, which comprises the following steps: 1) Preparing functional master batches, namely mixing a polymer matrix, wear-resistant filler and a microe