Novel insulating material for cables

Abstract

The invention discloses a novel insulating material for cables. The material comprises an insulating layer, a shielding layer and a metal conductor; and the insulating layer is formed by fusing of a polypropylene polymer material and a polyethylene polymer material, and the insulation layer comprises 88 parts by weight of the polypropylene polymer material and 32 parts by weight of the polyethylene polymer material, wherein and the polypropylene polymer material includes the following components in parts by weight: 40 parts of polypropylene, 20 parts of rubber, 10 parts of polyvinyl chloride,5 parts of synthetic fibers and 7 parts of an adhesive; and the polyvinyl polymer material comprises the following components in parts by weight: 55 parts of polyethylene, 20 parts of calcium carbonate, 15 parts of polysulfone resin, and 3 parts of a binder. The insulating material for the cables contains the polyethylene, the polyethylene is odorless and non-toxic, has a hand feeling like wax, excellent low-temperature resistance, wherein the minimum usage temperature can reach -100 DEC C to 70 DEG C, good chemical stability, resistance to erosion of a plurality of acids and alkalis, insolubility in a common solvent under a normal temperature, and low water absorbing performance, thereby having excellent electrical insulating properties.

Description

technical field [0001] The invention relates to the field of cables, in particular to a novel cable insulation material. Background technique [0002] Cable is a general term for items such as optical cables and cables. There are many uses of cables, mainly used for multiple functions such as control installation, connection equipment, and power transmission. It is a common and indispensable thing in daily life. Since the cable is live, it needs to be installed carefully. Definition 1 of a cable: It is made of one or more mutually insulated conductors and an outer insulating layer, and the wire that transmits power or information from one place to another; Definition 2: Usually it is made of several or several groups of wires (Each group of at least two) twisted rope-like cables, each group of conductors are insulated from each other, and are often twisted around a center, and the entire outer surface is covered with a highly insulating coating. The cables include power cab...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantages of the cable: overload operation for a long time, the temperature of the cable will rise, the insulation will age, so that the insulation will be broken down and the construction quality will be reduced; the electrical aspects include: the construction technology of the cable head cannot meet the requirements, the sealing of the cable head is poor, Moisture invades the inside of the cable, and the insulation performance of the cable is reduced; when the cable is laid, protective measures are not taken, the protective layer is destroyed, and the insulation is reduced; in terms of civil engineering: the drainage of the well pipe trench is not smooth, and the cable is soaked in water for a long time, which damages the insulation strength of the work well Too small, the bending radius of the cable is not enough, long-term extrusion external force damage is mainly caused by mechanical brutal construction in municipal construction, digging and breaking the cable; the corrosion protection layer has been subjected to chemical corrosion or cable corrosion for a long time, resulting in failure of the protection layer and reduced insulation; the cable itself Or the quality of the cable head accessories is poor, the sealing of the cable head is poor, the insulating glue is dissolved, and it is cracked, which leads to the resonance phenomenon of the station. Ferromagnetic resonance, the use of cables in some safety protection equipment and large outdoor machinery requires high cable resistance, and the cable is required to be waterproof and tensile, especially in safety protection equipment. damage caused by safety accidents