To provide an easily adhesive film having excellent abrasion resistance and blocking resistance without damaging the adhesiveness even if the surface at the side of a coated layer formed as an easily adhesive layer is the extremely flat surface having ≤5 nm center area average surface roughness.
The easily adhesive film comprises a biaxially oriented polyester film, and a coated film layer present on one surface thereof and obtained by using a water-dispersible copolyester resin and inactive particles, and is regulated so that (1) the reduced viscosity of the water-dispersible copolyester resin is within the range of 0.5-1.0 g/dl, (2) the average particle diameter of the inactive particles is within the range of 10-50 nm, (3) the thickness of the coated film layer is within the range of 4-25 nm, and (4) the center area average roughness (WRa) of the surface at the coated film layer side of the easily adhesive film is within the range of 0.5-5 nm.
COPYRIGHT: (C)2008,JPO&INPIT
KOBAYASHI IEYASU
IIDA MAKOTO
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