Provided is a power cable and a method for manufacturing a power cable that reduces occurrence of uneven thickness of an insulating layer and voids and peeling due to shrinkage and has good dielectric breakdown strength. The power cable includes the insulating layer containing 15 mass % or more of a propylene-based resin having a melting point of 110? C. or higher with respect to a whole. The power cable further includes a relationship between a cooling rate X [? C./min] at the time of manufacturing an interface portion in the insulating layer with the inner semiconductive layer and a cooling rate Y [? C./min] at the time of manufacturing a central portion of the insulating layer and is expressed by the relationship (Z), wherein X?Y?0.8 . . . (Z).

An energy cable comprising at least one cable core comprising an electric conductor, a crosslinked electrically insulating system comprising an inner semiconducting layer, an insulating layer and an outer semiconducting layer and zeolite particles placed between the electric conductor and the inner semiconducting layer of the insulating system. The zeolite particles are able to efficiently extract and irreversibly absorb the by-products deriving from the cross-linking reaction, so as to avoid space charge accumulation in the insulating material during cable lifespan. This allows to eliminate the high temperature, long lasting degassing process of the energy cable cores having a crosslinked insulating layer, or at least to reduce temperature and/or duration of the same, so as to increase productivity and reduce manufacturing costs.

An insulated wire and a preparation method therefor, a coil, and an electronic/electrical device are provided. In the preparation method, the thermoplastic polyimide is extruded to mold by adopting the extrusion process, so as to form the insulating layer on the core material, which can significantly improve the production efficiency compared to the traditional multiple-time coating process. The preparation process of the bonding layer and the extrusion process are optimized; the bonding layer is prepared by a specific bonding layer formulation; and then the insulating layer is extruded under a specific negative pressure, so that the prepared thermoplastic polyimide insulating layer has fewer bubbles, and the size of the bubbles is smaller, which ensures the insulating layer to have a higher breakdown voltage.

An insulated wire and a preparation method therefor, a coil, and an electronic/electrical device are provided. In the preparation method, the thermoplastic polyimide is extruded to mold by adopting the extrusion process, so as to form the insulating layer on the core material, which can significantly improve the production efficiency compared to the traditional multiple-time coating process. The preparation process of the bonding layer and the extrusion process are optimized; the bonding layer is prepared by a specific bonding layer formulation; and then the insulating layer is extruded under a specific negative pressure, so that the prepared thermoplastic polyimide insulating layer has fewer bubbles, and the size of the bubbles is smaller, which ensures the insulating layer to have a higher breakdown voltage.

An insulated wire, coil, and electronic or electrical device, and relates to the technical field of electrochemical components. An insulated wire, wherein, the insulated wire comprises the core material and the insulating layer coating the core material; the core material comprises a conductor and a bonding layer coated on the conductor; and the insulating layer is formed by the thermoplastic polyimide; the bonding layer comprises the following components: the polyamide-imide, the polyimide, and the organic solvent.