Laminate of conductor and insulating coating, coil, rotating electric machine, insulating paint, and insulating film

A laminate comprising at least a conductor, an insulating coating, a composite layer and an inorganic insulating layer, wherein:

• the insulating coating is formed of a resin composition containing a metal oxide hydrate,
• the resin composition contains the metal oxide hydrate in an amount of 6 to 50 parts by mass per 100 parts by mass of the resin, wherein the metal oxide hydrate is in a shape of flat fine particles having a high aspect ratio (one side/thickness) of 4 to 200,
• the resin in the resin composition is at least one selected from the group consisting of a polyamide-imide, a polyimide, and precursors thereof,
• the inorganic insulating layer is formed on the insulating coating when the laminate is exposed to partial discharge caused by inverter surges occurring due to switching at a frequency of 1 to 100 kHz, and the composite layer is also formed between the conductor and the inorganic insulating layer, wherein a thickness of the inorganic insulating layer is 10 nm or more and wherein a void ratio of the inorganic insulating layer is lower than 20%, and
• the composite layer contains a mixture of the resin and the metal oxide hydrate contained in the insulating coating, and a metal oxide or a metal oxide hydrate formed by dehydration of the metal oxide hydrate contained in the inorganic insulating layer, wherein the composite layer contains voids that are formed upon elimination of a portion of the resin from the composite layer by the partial discharge, wherein a void ratio of the composite layer is 20% or more.