| 摘要 |
PROBLEM TO BE SOLVED: To provide a capacitor thermal adhesive polyester film as a dielectric film which is suitable for reducing electronic equipment in size and weight and given an external packaging function, without increasing the external packaging in size and weight, improved in adhesion properties and blocking resistance properties, uses a water-soluble dopant which gives no hazard to an environment, and is capable of shortening a thermal bonding time required for an external packaging. SOLUTION: This thermal adhesive polyester film is composed of a polyester resin base film and a water-dispersed urethane thermal adhesive resin layer 0.1 g/m<2> to 2.0 g/m<2> formed, at least, on its one surface. Furthermore, 1.0 to 15 mass% spherical and monodispersive inactive particles are contained in the resin layer, and it is preferable that a capacitor polyester film contain 100 ppm to 300 ppm antimony compound in terms of antimony element used as a polymerizing catalyst of polyester resin, has a thermal adhesion starting temperature of 80 to 120 deg.C, and is 3 to 30μm in thickness. |
