Foaming resin composition, foam using the same and coaxial insulated cable

摘要

A foaming composition can be provided which is a fluororesin composition comprising a fluororesin and an electrical insulating whisker and which is foamed by being mixed with a foaming agent to reduce a diameter of cells. Thus, the diameter of cells of the foam obtained by foaming can be reduced. Further, a coaxial insulated cable can be provided in which an insulator layer made of this foam is arranged around a central conductor.