| 摘要 |
<p>A polyester resin composition to be used mainly for metal cans, which can be extruded directly on a metal sheet to form a laminate, can satisfactorily withstand the severe conditions of can-making, drying and baking steps, and is excellent in flavor; and films and laminates having such properties. A polyester resin composition which comprises a polyester mainly comprising ethylene terephthalate units, having a melting point of 220 °C or above and containing a polyfunctional compound and a copolyester mainly comprising butylene terephthalate units and having a melting point of 150 to 210 °C and a glass transition temperature of 20 °C or below and contains a hindered phenol and tocopherol; a polyester mainly comprising ethylene terephthalate units, having a melting point of 220 °C or above, containing a polyfunctional compound and exhibiting a die swell of 1.3 or above at the melting point plus 40 °C; and a copolyester mainly comprising butylene terephthalate units and having a melting point of 150 to 210 °C, a glass transition temperature of 20 °C or below and a free TPA content of 20 ppm or below; and films and metal laminates made by using the polyethylene terephthalate resin or the polyester resin composition.</p> |
