| 摘要 |
PURPOSE: To provide a method for manufacturing a novel laminated white polyester film which exhibits white and which is scarcely cleaved even if fine numerous pores exist therein and has large breakage strength between layers. CONSTITUTION: A laminated white polyester film is manufactured by laminating a polyester layer in which the quantity not exceeding 30wt.% of polyolefin resin is added to polyester and polyalkyleneglycol or its copolymer of 0.5 to 5wt.% is added, and the other polyester layer A, extrusion molding it in a sheet state from a T die, and then supplying it to a biaxially orienting step. |
