Magnetic recording medium

摘要

A magnetic recording medium is disclosed, comprising a non-magnetic support having an undercoating layer provided on said non-magnetic support and a magnetic layer provided on said undercoating layer, wherein said undercoating layer provided between said non-magnetic support and said magnetic layer comprises mainly a non-magnetic fine particles having an average particle size of 100 to 350 ANGSTROM and a binder; said binder is a polyester resin having a glass transition temperature (Tg) of 40 DEG C. or less, said undercoating layer has a thickness of 30 to 250 ANGSTROM ; and said magnetic layer is a ferromagnetic metal thin film.