Laminated polyester film.

摘要

Disclosed herein is a laminated film comprising a polyester film containing minute closed cells and having a density of 0.40 to 1.30 g/cm<3> and a polyester film having a density of more than 1.30 g/cm<3> laminated on one side or both sides of the polyester film containing minute closed cells. In the laminated film of the present invention, the surface smoothness, which is a serious defect of a conventional film containing a large number of minute closed cells, is improved and the ink adhesive property is also improved, thereby enhancing the printing suitability. The breakage during the stretching process of film formation is reduced and the film forming properties are improved. Thus, the productivity was enhanced, thereby enabling the film to be supplied to the market at a low cost. Application of the film to various fields is enabled and the industrial value of the film is very large.