| abstract |
In the biaxially stretched saturated polyester film (for example, PET film) of the present invention, the surface of the film is subjected to a low temperature plasma treatment using a low temperature plasma processor (1), whereby the number of oxygen atoms (0) and the number of carbon atoms (C) on the surface of the film are reduced. The composition ratio X (O / C) is larger than the theoretical value in the range of 2.5% to 20%. Thereby, it becomes heat-sealable at the heating temperature of 100 degreeC-200 degreeC, For example, a laminated body is easily formed between the same kind of films, or metal foil or a different kind of plastic film by a hot press or a heat roll. It can manufacture. |