Laminated polyester film
The present invention provides a laminated polyester film which can be suitably used for extrusion lamination with polyolefins and comprises a coating layer having an excellent adhesion property to the polyolefins, in particular, a coating layer having a remarkably excellent adhesion property to polypropylene. The laminated polyester film of the present invention comprises a polyester film and a coating layer formed on a surface of the polyester film which is formed by applying a coating composition comprising (A) a modified polyolefin having two melting points, and at least one crosslinking agent, and then drying the coating composition applied.
1. A laminated polyester film comprising a polyester film and a coating layer formed on a surface of the polyester film which is formed by applying a coating composition comprising a modified polyolefin which is copolymerized with a polyalkyleneoxide or a polyalkyleneimine and has two melting points, and at least one crosslinking agent, and then drying the coating composition applied, wherein a coating amount of the coating composition is 0.005 to 0.08 g/m 2 .
2. A laminated polyester film according to claim 1 , wherein a coating amount of the coating composition is 0.005 to 0.06 g/m 2 .
3. A laminated polyester film according to claim 1 , wherein the modified polyolefin is a modified polypropylene.
4. A laminated polyester film according to claim 1 , wherein the two melting points are a first melting point and a second melting point,
wherein the first melting point is in the range of 0 to 50° C., and
the second melting point is in the range of 50 to 180° C.