ADHESIVE FILM FOR OPTICAL SHEET PROTECTION AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an adhesive film for optical sheet protection capable of enlarging surface roughness of a substrate film easily and efficiently, leaving no open cell involved on an adhesive surface and presenting a good film appearance. SOLUTION: The adhesive film for optical sheet protection comprises a substrate layer laminated with an adhesive layer on one side of it; wherein the substrate layer consists of a resin composition containing 55-80 wt.% of a propylene-based polymer and 45-20 wt.% of an ethylene-based polymer and the value of melt mass flow rate (MFR) of the propylene-based polymer divided by MFR of the ethylene based polymer is 5.0 or more and 30.0 or less. The substrate layer in the side opposite to the side laminated with the adhesive layer is preferably 4.0μm or more and 15.0μm or less in ten point average roughness in machine direction (MD). COPYRIGHT: (C)2010,JPO&INPIT