MOLDED STRUCTURE AND MOTOR
A molded structure according to the present invention is formed from a molding resin which includes at least a thermosetting resin, a thermoplastic resin, and an electrically insulating inorganic filler subjected to a surface treatment with a coupling agent, and which contains the coupling agent in an amount 0.5 times to 2 times the amount of the coupling agent necessary to cover the total surface area of the inorganic filler. Thus, the adhesion is improved between the resin and the inorganic filler in the molding resin, and a molded structure can be achieved which has a high thermal conductivity and high dimensional stability.
1 . A molded structure formed from a molding resin,
the molding resin including:
at least a thermosetting resin;
a thermoplastic resin; and
an electrically insulating inorganic filler subjected to a surface treatment with a coupling agent, and
the molding resin containing the coupling agent in an amount 0.5 times to 2 times an amount of the coupling agent necessary to cover a total surface area of the inorganic filler.
2 . The molded structure according to claim 1 , wherein the thermosetting resin is an unsaturated polyester resin, and the thermoplastic resin is a polystyrene resin incompatible with the unsaturated polyester resin.
3 . The molded structure according to claim 1 , wherein the inorganic filler contains a metal hydrate.
4 . The molded structure according to claim 3 , wherein a content of the metal hydrate is twice or more than a total content of the thermosetting resin and the thermoplastic resin.
5 . The molded structure according to claim 1 , wherein a total content of the thermosetting resin and the thermoplastic resin in the molding resin ranges from 16% to 25% of the molding resin, and a mixture ratio of the thermoplastic resin to the total content ranges from 11% to 67%.
6 . A motor comprising a molded structure obtained by mold forming of a magnet coil wound on at least an iron core with the molding resin according to claim 1 .