ADHESIVE COMPOSITION, INSULATING FILM, INSULATING FILM PRODUCTION METHOD, AND FLAT CABLE

摘要

The purpose of the present invention is to provide an adhesive composition that has excellent post-hardening heat resistance, appearance, flame retardancy, and electrical characteristics. The adhesive composition according to one embodiment of the present invention contains at least one type of a first polyester that has a melt viscosity at 200 ℃ of less than 350 Pa·s, at least one type of a second polyester that has a melt viscosity at 200 ℃ of 350 Pa·s or more, and a phosphorus-based flame retardant, the content of the phosphorus-based flame retardant being 20-100 parts by mass per 100 total parts by mass of the first polyester and the second polyester. The adhesive composition preferably also contains a nitrogen-based flame retardant, the content of the nitrogen-based flame retardant preferably being 10-75 parts by mass per 100 total parts by mass of the first polyester and the second polyester. The difference between the melt viscosity of the first polyester at 200 ℃ and the melt viscosity of the second polyester at 200 ℃ is preferably 100 Pa·s or more.