Polyester films, vacuum-formed bodies or pressure-formed bodies, laminates for vacuum or pressure forming, and uses thereof

Abstract

The problem addressed by the present invention is to provide a polyester film and the like that exhibit excellent vacuum formability and / or pressure formability. To solve this problem, the polyester film contains: a first polyester resin, which is a polymer comprising a first acid unit containing a terephthalic acid unit and a first alcohol unit containing a 1,4-butanediol unit; and a second polyester resin, which is a polymer comprising a second acid unit containing a terephthalic acid unit and a second alcohol unit containing an ethylene glycol unit. The mass ratio (A / B) of the content A of the first polyester resin to the content B of the second polyester resin is from 0.8 to 10. When differential scanning calorimetry is performed at a heating rate of 10℃ / min and over a measurement temperature range of 0℃ to 300℃, a cold crystallization peak corresponding to cold crystallization heat is observed, the area of the cold crystallization peak is 10 J / g or more, and the peak temperature is from 50℃ to 105℃.