Method of producing molded product, molded product and rectangular wire

A method of producing a molded product in which a fluorine-type thermoplastic resin F is dispersed in a polyimide-type thermoplastic resin P, the method comprising:

• preparing a composition comprising the polyimide-type thermoplastic resin P and the fluorine-type thermoplastic resin F which has a lower glass transition temperature than the polyimide-type thermoplastic resin P, wherein a difference ΔTg between a glass transition temperature Tg−p of the polyimide-type thermoplastic resin P and a glass transition temperature Tg−f of the fluorine-type thermoplastic resin F is from 75 to 175° C.;
• melting the composition at a temperature equal to or higher than a higher melting point between a melting point of the polyimide-type thermoplastic resin P and a melting point of the fluorine-type thermoplastic resin F, and obtaining a molten product;
• and
• starting cooling of the molten product at a cooling rate of 10° C./min or more and obtaining a molded product.